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Text File | 1993-08-12 | 167.1 KB | 5,680 lines

TABLE OF CONTENTS dos.library/AbortPkt dos.library/AddBuffers dos.library/AddDosEntry dos.library/AddPart dos.library/AddSegment dos.library/AllocDosObject dos.library/AssignAdd dos.library/AssignLate dos.library/AssignLock dos.library/AssignPath dos.library/AttemptLockDosList dos.library/ChangeMode dos.library/CheckSignal dos.library/Cli dos.library/CliInitNewcli dos.library/CliInitRun dos.library/Close dos.library/CompareDates dos.library/CreateDir dos.library/CreateNewProc dos.library/CreateProc dos.library/CurrentDir dos.library/DateStamp dos.library/DateToStr dos.library/Delay dos.library/DeleteFile dos.library/DeleteVar dos.library/DeviceProc dos.library/DoPkt dos.library/DupLock dos.library/DupLockFromFH dos.library/EndNotify dos.library/ErrorReport dos.library/ExAll dos.library/ExAllEnd dos.library/Examine dos.library/ExamineFH dos.library/Execute dos.library/Exit dos.library/ExNext dos.library/Fault dos.library/FGetC dos.library/FGets dos.library/FilePart dos.library/FindArg dos.library/FindCliProc dos.library/FindDosEntry dos.library/FindSegment dos.library/FindVar dos.library/Flush dos.library/Format dos.library/FPutC dos.library/FPuts dos.library/FRead dos.library/FreeArgs dos.library/FreeDeviceProc dos.library/FreeDosEntry dos.library/FreeDosObject dos.library/FWrite dos.library/GetArgStr dos.library/GetConsoleTask dos.library/GetCurrentDirName dos.library/GetDeviceProc dos.library/GetFileSysTask dos.library/GetProgramDir dos.library/GetProgramName dos.library/GetPrompt dos.library/GetVar dos.library/Info dos.library/Inhibit dos.library/Input dos.library/InternalLoadSeg dos.library/InternalUnLoadSeg dos.library/IoErr dos.library/IsFileSystem dos.library/IsInteractive dos.library/LoadSeg dos.library/Lock dos.library/LockDosList dos.library/LockRecord dos.library/LockRecords dos.library/MakeDosEntry dos.library/MakeLink dos.library/MatchEnd dos.library/MatchFirst dos.library/MatchNext dos.library/MatchPattern dos.library/MatchPatternNoCase dos.library/MaxCli dos.library/NameFromFH dos.library/NameFromLock dos.library/NewLoadSeg dos.library/NextDosEntry dos.library/Open dos.library/OpenFromLock dos.library/Output dos.library/ParentDir dos.library/ParentOfFH dos.library/ParsePattern dos.library/ParsePatternNoCase dos.library/PathPart dos.library/PrintFault dos.library/PutStr dos.library/Read dos.library/ReadArgs dos.library/ReadItem dos.library/ReadLink dos.library/Relabel dos.library/RemAssignList dos.library/RemDosEntry dos.library/RemSegment dos.library/Rename dos.library/ReplyPkt dos.library/RunCommand dos.library/SameDevice dos.library/SameLock dos.library/Seek dos.library/SelectInput dos.library/SelectOutput dos.library/SendPkt dos.library/SetArgStr dos.library/SetComment dos.library/SetConsoleTask dos.library/SetCurrentDirName dos.library/SetFileDate dos.library/SetFileSize dos.library/SetFileSysTask dos.library/SetIoErr dos.library/SetMode dos.library/SetOwner dos.library/SetProgramDir dos.library/SetProgramName dos.library/SetPrompt dos.library/SetProtection dos.library/SetVar dos.library/SetVBuf dos.library/SplitName dos.library/StartNotify dos.library/StrToDate dos.library/StrToLong dos.library/SystemTagList dos.library/UnGetC dos.library/UnLoadSeg dos.library/UnLock dos.library/UnLockDosList dos.library/UnLockRecord dos.library/UnLockRecords dos.library/VFPrintf dos.library/VFWritef dos.library/VPrintf dos.library/WaitForChar dos.library/WaitPkt dos.library/Write dos.library/WriteChars dos.library/AbortPkt dos.library/AbortPkt NAME AbortPkt -- Aborts an asynchronous packet, if possible. (V36) SYNOPSIS AbortPkt(port, pkt) D1 D2 void AbortPkt(struct MsgPort *, struct DosPacket *) FUNCTION This attempts to abort a packet sent earlier with SendPkt to a handler. There is no guarantee that any given handler will allow a packet to be aborted, or if it is aborted whether function requested completed first or completely. After calling AbortPkt(), you must wait for the packet to return before reusing it or deallocating it. INPUTS port - port the packet was sent to pkt - the packet you wish aborted BUGS As of V37, this function does nothing. SEE ALSO SendPkt(), DoPkt(), WaitPkt() dos.library/AddBuffers dos.library/AddBuffers NAME AddBuffers -- Changes the number of buffers for a filesystem (V36) SYNOPSIS success = AddBuffers(filesystem, number) D0 D1 D2 BOOL AddBuffers(STRPTR, LONG) FUNCTION Adds buffers to a filesystem. If it succeeds, the number of current buffers is returned in IoErr(). Note that "number" may be negative. The amount of memory used per buffer, and any limits on the number of buffers, are dependant on the filesystem in question. If the call succeeds, the number of buffers in use on the filesystem will be returned by IoErr(). INPUTS filesystem - Name of device to add buffers to (with ':'). number - Number of buffers to add. May be negative. RESULT success - Success or failure of command. BUGS The V36 ROM filesystem (FFS/OFS) doesn't return the right number of buffers unless preceded by an AddBuffers(fs,-1) (in-use buffers aren't counted). This is fixed in V37. The V37 and before ROM filesystem doesn't return success, it returns the number of buffers. The best way to test for this is to consider 0 (FALSE) failure, -1 (DOSTRUE) to mean that IoErr() will have the number of buffers, and any other positive value to be the number of buffers. It may be fixed in some future ROM revision. SEE ALSO IoErr() dos.library/AddDosEntry dos.library/AddDosEntry NAME AddDosEntry -- Add a Dos List entry to the lists (V36) SYNOPSIS success = AddDosEntry(dlist) D0 D1 LONG AddDosEntry(struct DosList *) FUNCTION Adds a device, volume or assign to the dos devicelist. Can fail if it conflicts with an existing entry (such as another assign to the same name or another device of the same name). Volume nodes with different dates and the same name CAN be added, or with names that conflict with devices or assigns. Note: the dos list does NOT have to be locked to call this. Do not access dlist after adding unless you have locked the Dos Device list. An additional note concerning calling this from within a handler: in order to avoid deadlocks, your handler must either be multi- threaded, or it must attempt to lock the list before calling this function. The code would look something like this: if (AttemptLockDosList(LDF_xxx|LDF_WRITE)) { rc = AddDosEntry(...); UnLockDosList(LDF_xxx|LDF_WRITE); } If AttemptLockDosList() fails (i.e. it's locked already), check for messages at your filesystem port (don't wait!) and try the AttemptLockDosList() again. INPUTS dlist - Device list entry to be added. RESULT success - Success/Failure indicator SEE ALSO RemDosEntry(), FindDosEntry(), NextDosEntry(), LockDosList(), MakeDosEntry(), FreeDosEntry(), AttemptLockDosList() dos.library/AddPart dos.library/AddPart NAME AddPart -- Appends a file/dir to the end of a path (V36) SYNOPSIS success = AddPart( dirname, filename, size ) D0 D1 D2 D3 BOOL AddPart( STRPTR, STRPTR, ULONG ) FUNCTION This function adds a file, directory, or subpath name to a directory path name taking into account any required separator characters. If filename is a fully-qualified path it will totally replace the current value of dirname. INPUTS dirname - the path to add a file/directory name to. filename - the filename or directory name to add. May be a relative pathname from the current directory (example: foo/bar). Can deal with leading '/'(s), indicating one directory up per '/', or with a ':', indicating it's relative to the root of the appropriate volume. size - size in bytes of the space allocated for dirname. Must not be 0. RESULT success - non-zero for ok, FALSE if the buffer would have overflowed. If an overflow would have occured, dirname will not be changed. BUGS Doesn't check if a subpath is legal (i.e. doesn't check for ':'s) and doesn't handle leading '/'s in 2.0 through 2.02 (V36). V37 fixes this, allowing filename to be any path, including absolute. SEE ALSO Filepart(), PathPart() dos.library/AddSegment dos.library/AddSegment NAME AddSegment - Adds a resident segment to the resident list (V36) SYNOPSIS success = AddSegment(name, seglist, type) D0 D1 D2 D3 BOOL AddSegment(STRPTR, BPTR, LONG) FUNCTION Adds a segment to the Dos resident list, with the specified Seglist and type (stored in seg_UC - normally 0). NOTE: currently unused types may cause it to interpret other registers (d4-?) as additional parameters in the future. Do NOT build Segment structures yourself! INPUTS name - name for the segment seglist - Dos seglist of code for segment type - initial usecount, normally 0 RESULT success - success or failure SEE ALSO FindSegment(), RemSegment(), LoadSeg() dos.library/AllocDosObject dos.library/AllocDosObject NAME AllocDosObject -- Creates a dos object (V36) SYNOPSIS ptr = AllocDosObject(type, tags) D0 D1 D2 void *AllocDosObject(ULONG, struct TagItem *) ptr = AllocDosObjectTagList(type, tags) D0 D1 D2 void *AllocDosObjectTagList(ULONG, struct TagItem *) ptr = AllocDosObjectTags(type, Tag1, ...) void *AllocDosObjectTags(ULONG, ULONG, ...) FUNCTION Create one of several dos objects, initializes it, and returns it to you. Note the DOS_STDPKT returns a pointer to the sp_Pkt of the structure. This function may be called by a task for all types and tags defined in the V37 includes (DOS_FILEHANDLE through DOS_RDARGS and ADO_FH_Mode through ADO_PromptLen, respectively). Any future types or tags will be documented as to whether a task may use them. INPUTS type - type of object requested tags - pointer to taglist with additional information RESULT packet - pointer to the object or NULL BUGS Before V39, DOS_CLI should be used with care since FreeDosObject() can't free it. SEE ALSO FreeDosObject(), <dos/dostags.h>, <dos/dos.h> dos.library/AssignAdd dos.library/AssignAdd NAME AssignAdd -- Adds a lock to an assign for multi-directory assigns (V36) SYNOPSIS success = AssignAdd(name,lock) D0 D1 D2 BOOL AssignAdd(STRPTR,BPTR) FUNCTION Adds a lock to an assign, making or adding to a multi-directory assign. Note that this only will succeed on an assign created with AssignLock(), or an assign created with AssignLate() which has been resolved (converted into a AssignLock()-assign). NOTE: you should not use the lock in any way after making this call successfully. It becomes the part of the assign, and will be unlocked by the system when the assign is removed. If you need to keep the lock, pass a lock from DupLock() to AssignLock(). INPUTS name - Name of device to assign lock to (without trailing ':') lock - Lock associated with the assigned name RESULT success - Success/failure indicator. On failure, the lock is not unlocked. SEE ALSO Lock(), AssignLock(), AssignPath(), AssignLate(), DupLock(), RemAssignList() dos.library/AssignLate dos.library/AssignLate NAME AssignLate -- Creates an assignment to a specified path later (V36) SYNOPSIS success = AssignLate(name,path) D0 D1 D2 BOOL AssignLate(STRPTR,STRPTR) FUNCTION Sets up a assignment that is expanded upon the FIRST reference to the name. The path (a string) would be attached to the node. When the name is referenced (Open("FOO:xyzzy"...), the string will be used to determine where to set the assign to, and if the directory can be locked, the assign will act from that point on as if it had been created by AssignLock(). A major advantage is assigning things to unmounted volumes, which will be requested upon access (useful in startup sequences). INPUTS name - Name of device to be assigned (without trailing ':') path - Name of late assignment to be resolved on the first reference. RESULT success - Success/failure indicator of the operation SEE ALSO Lock(), AssignAdd(), AssignPath(), AssignLock(), dos.library/AssignLock dos.library/AssignLock NAME AssignLock -- Creates an assignment to a locked object (V36) SYNOPSIS success = AssignLock(name,lock) D0 D1 D2 BOOL AssignLock(STRPTR,BPTR) FUNCTION Sets up an assign of a name to a given lock. Passing NULL for a lock cancels any outstanding assign to that name. If an assign entry of that name is already on the list, this routine replaces that entry. If an entry is on the list that conflicts with the new assign, then a failure code is returned. NOTE: you should not use the lock in any way after making this call successfully. It becomes the assign, and will be unlocked by the system when the assign is removed. If you need to keep the lock, pass a lock from DupLock() to AssignLock(). INPUTS name - Name of device to assign lock to (without trailing ':') lock - Lock associated with the assigned name RESULT success - Success/failure indicator. On failure, the lock is not unlocked. SEE ALSO Lock(), AssignAdd(), AssignPath(), AssignLate(), DupLock(), RemAssignList() dos.library/AssignPath dos.library/AssignPath NAME AssignPath -- Creates an assignment to a specified path (V36) SYNOPSIS success = AssignPath(name,path) D0 D1 D2 BOOL AssignPath(STRPTR,STRPTR) FUNCTION Sets up a assignment that is expanded upon EACH reference to the name. This is implemented through a new device list type (DLT_ASSIGNPATH, or some such). The path (a string) would be attached to the node. When the name is referenced (Open("FOO:xyzzy"...), the string will be used to determine where to do the open. No permanent lock will be part of it. For example, you could AssignPath() c2: to df2:c, and references to c2: would go to df2:c, even if you change disks. The other major advantage is assigning things to unmounted volumes, which will be requested upon access (useful in startup sequences). INPUTS name - Name of device to be assigned (without trailing ':') path - Name of late assignment to be resolved at each reference RESULT success - Success/failure indicator of the operation SEE ALSO AssignAdd(), AssignLock(), AssignLate(), Open() dos.library/AttemptLockDosList dos.library/AttemptLockDosList NAME AttemptLockDosList -- Attempt to lock the Dos Lists for use (V36) SYNOPSIS dlist = AttemptLockDosList(flags) D0 D1 struct DosList *AttemptLockDosList(ULONG) FUNCTION Locks the dos device list in preparation to walk the list. If the list is 'busy' then this routine will return NULL. See LockDosList() for more information. INPUTS flags - Flags stating which types of nodes you want to lock. RESULT dlist - Pointer to the beginning of the list or NULL. Not a valid node! BUGS In V36 through V39.23 dos, this would return NULL or 0x00000001 for failure. Fixed in V39.24 dos (after kickstart 39.106). SEE ALSO LockDosList(), UnLockDosList(), Forbid(), NextDosEntry() dos.library/ChangeMode dos.library/ChangeMode NAME ChangeMode - Change the current mode of a lock or filehandle (V36) SYNOPSIS success = ChangeMode(type, object, newmode) D0 D1 D2 D3 BOOL ChangeMode(ULONG, BPTR, ULONG) FUNCTION This allows you to attempt to change the mode in use by a lock or filehandle. For example, you could attempt to turn a shared lock into an exclusive lock. The handler may well reject this request. Warning: if you use the wrong type for the object, the system may crash. INPUTS type - Either CHANGE_FH or CHANGE_LOCK object - A lock or filehandle newmode - The new mode you want RESULT success - Boolean BUGS Did not work in 2.02 or before (V36). Works in V37. In the earlier versions, it can crash the machine. SEE ALSO Lock(), Open() dos.library/CheckSignal dos.library/CheckSignal NAME CheckSignal -- Checks for break signals (V36) SYNOPSIS signals = CheckSignal(mask) D0 D1 ULONG CheckSignal(ULONG) FUNCTION This function checks to see if any signals specified in the mask have been set and if so, returns them. Otherwise it returns FALSE. All signals specified in mask will be cleared. INPUTS mask - Signals to check for. RESULT signals - Signals specified in mask that were set. SEE ALSO dos.library/Cli dos.library/Cli NAME Cli -- Returns a pointer to the CLI structure of the process (V36) SYNOPSIS cli_ptr = Cli() D0 struct CommandLineInterface *Cli(void) FUNCTION Returns a pointer to the CLI structure of the current process, or NULL if the process has no CLI structure. RESULT cli_ptr - pointer to the CLI structure, or NULL. SEE ALSO dos.library/CliInitNewcli dos.library/CliInitNewcli NAME CliInitNewcli -- Set up a process to be a shell from initial packet SYNOPSIS flags = CliInitNewcli( packet ) D0 A0 LONG CliInitNewcli( struct DosPacket * ) FUNCTION This function initializes a process and CLI structure for a new shell, from parameters in an initial packet passed by the system (NewShell or NewCLI, etc). The format of the data in the packet is purposely not defined. The setup includes all the normal fields in the structures that are required for proper operation (current directory, paths, input streams, etc). It returns a set of flags containing information about what type of shell invocation this is. Definitions for the values of fn: Bit 31 Set to indicate flags are valid Bit 3 Set to indicate asynch system call Bit 2 Set if this is a System() call Bit 1 Set if user provided input stream Bit 0 Set if RUN provided output stream If Bit 31 is 0, then you must check IoErr() to determine if an error occurred. If IoErr() returns a pointer to your process, there has been an error, and you should clean up and exit. The packet will have already been returned by CliInitNewcli(). If it isn't a pointer to your process and Bit 31 is 0, reply the packet immediately. (Note: this is different from what you do for CliInitRun().) This function is very similar to CliInitRun(). INPUTS packet - the initial packet sent to your process MsgPort RESULT fn - flags or a pointer SEE ALSO CliInitRun(), ReplyPkt(), WaitPkt(), IoErr() dos.library/CliInitRun dos.library/CliInitRun NAME CliInitRun -- Set up a process to be a shell from initial packet SYNOPSIS flags = CliInitRun( packet ) D0 A0 LONG CliInitRun( struct DosPacket * ) FUNCTION This function initializes a process and CLI structure for a new shell, from parameters in an initial packet passed by the system (Run, System(), Execute()). The format of the data in the packet is purposely not defined. The setup includes all the normal fields in the structures that are required for proper operation (current directory, paths, input streams, etc). It returns a set of flags containing information about what type of shell invocation this is. Definitions for the values of fn: Bit 31 Set to indicate flags are valid Bit 3 Set to indicate asynch system call Bit 2 Set if this is a System() call Bit 1 Set if user provided input stream Bit 0 Set if RUN provided output stream If Bit 31 is 0, then you must check IoErr() to determine if an error occurred. If IoErr() returns a pointer to your process, there has been an error, and you should clean up and exit. The packet will have already been returned by CliInitNewcli(). If it isn't a pointer to your process and Bit 31 is 0, you should wait before replying the packet until after you've loaded the first command (or when you exit). This helps avoid disk "gronking" with the Run command. (Note: this is different from what you do for CliInitNewcli().) If Bit 31 is 1, then if Bit 3 is one, ReplyPkt() the packet immediately (Asynch System()), otherwise wait until your shell exits (Sync System(), Execute()). (Note: this is different from what you do for CliInitNewcli().) This function is very similar to CliInitNewcli(). INPUTS packet - the initial packet sent to your process MsgPort RESULT fn - flags or a pointer SEE ALSO CliInitNewcli(), ReplyPkt(), WaitPkt(), System(), Execute(), IoErr() dos.library/Close dos.library/Close NAME Close -- Close an open file SYNOPSIS success = Close( file ) D0 D1 BOOL Close(BPTR) FUNCTION The file specified by the file handle is closed. You must close all files you explicitly opened, but you must not close inherited file handles that are passed to you (each filehandle must be closed once and ONLY once). If Close() fails, the file handle is still deallocated and should not be used. INPUTS file - BCPL pointer to a file handle RESULTS success - returns if Close() succeeded. Note that it might fail depending on buffering and whatever IO must be done to close a file being written to. NOTE: this return value did not exist before V36! SEE ALSO Open(), OpenFromLock() dos.library/CompareDates dos.library/CompareDates NAME CompareDates -- Compares two datestamps (V36) SYNOPSIS result = CompareDates(date1,date2) D0 D1 D2 LONG CompareDates(struct DateStamp *,struct DateStamp *) FUNCTION Compares two times for relative magnitide. <0 is returned if date1 is later than date2, 0 if they are equal, or >0 if date2 is later than date1. NOTE: this is NOT the same ordering as strcmp! INPUTS date1, date2 - DateStamps to compare RESULT result - <0, 0, or >0 based on comparison of two date stamps SEE ALSO DateStamp(), DateToStr(), StrToDate() dos.library/CreateDir dos.library/CreateDir NAME CreateDir -- Create a new directory SYNOPSIS lock = CreateDir( name ) D0 D1 BPTR CreateDir(STRPTR) FUNCTION CreateDir creates a new directory with the specified name. An error is returned if it fails. Directories can only be created on devices which support them, e.g. disks. CreateDir returns an exclusive lock on the new directory if it succeeds. INPUTS name - pointer to a null-terminated string RESULTS lock - BCPL pointer to a lock or NULL for failure. SEE ALSO Lock(), UnLock() dos.library/CreateNewProc dos.library/CreateNewProc NAME CreateNewProc -- Create a new process (V36) SYNOPSIS process = CreateNewProc(tags) D0 D1 struct Process *CreateNewProc(struct TagItem *) process = CreateNewProcTagList(tags) D0 D1 struct Process *CreateNewProcTagList(struct TagItem *) process = CreateNewProcTags(Tag1, ...) struct Process *CreateNewProcTags(ULONG, ...) FUNCTION This creates a new process according to the tags passed in. See dos/dostags.h for the tags. You must specify one of NP_Seglist or NP_Entry. NP_Seglist takes a seglist (as returned by LoadSeg()). NP_Entry takes a function pointer for the routine to call. There are many options, as you can see by examining dos/dostags.h. The defaults are for a non-CLI process, with copies of your CurrentDir, HomeDir (used for PROGDIR:), priority, consoletask, windowptr, and variables. The input and output filehandles default to opens of NIL:, stack to 4000, and others as shown in dostags.h. This is a fairly reasonable default setting for creating threads, though you may wish to modify it (for example, to give a descriptive name to the process.) CreateNewProc() is callable from a task, though any actions that require doing Dos I/O (DupLock() of currentdir, for example) will not occur. NOTE: if you call CreateNewProc() with both NP_Arguments, you must not specify an NP_Input of NULL. When NP_Arguments is specified, it needs to modify the input filehandle to make ReadArgs() work properly. INPUTS tags - a pointer to a TagItem array. RESULT process - The created process, or NULL. Note that if it returns NULL, you must free any items that were passed in via tags, such as if you passed in a new current directory with NP_CurrentDir. BUGS In V36, NP_Arguments was broken in a number of ways, and probably should be avoided (instead you should start a small piece of your own code, which calls RunCommand() to run the actual code you wish to run). In V37, NP_Arguments works, though see the note above. SEE ALSO LoadSeg(), CreateProc(), ReadArgs(), RunCommand(), <dos/dostags.h> dos.library/CreateProc dos.library/CreateProc NAME CreateProc -- Create a new process SYNOPSIS process = CreateProc( name, pri, seglist, stackSize ) D0 D1 D2 D3 D4 struct MsgPort *CreateProc(STRPTR, LONG, BPTR, LONG) FUNCTION CreateProc() creates a new AmigaDOS process of name 'name'. AmigaDOS processes are a superset of exec tasks. A seglist, as returned by LoadSeg(), is passed as 'seglist'. This represents a section of code which is to be run as a new process. The code is entered at the first hunk in the segment list, which should contain suitable initialization code or a jump to such. A process control structure is allocated from memory and initialized. If you wish to fake a seglist (that will never have DOS UnLoadSeg() called on it), use this code: DS.L 0 ;Align to longword DC.L 16 ;Segment "length" (faked) DC.L 0 ;Pointer to next segment ...start of code... The size of the root stack upon activation is passed as 'stackSize'. 'pri' specifies the required priority of the new process. The result will be the process msgport address of the new process, or zero if the routine failed. The argument 'name' specifies the new process name. A zero return code indicates error. The seglist passed to CreateProc() is not freed when it exits; it is up to the parent process to free it, or for the code to unload itself. Under V36 and later, you probably should use CreateNewProc() instead. INPUTS name - pointer to a null-terminated string pri - signed long (range -128 to +127) seglist - BCPL pointer to a seglist stackSize - integer (must be a multiple of 4 bytes) RESULTS process - pointer to new process msgport SEE ALSO CreateNewProc(), LoadSeg(), UnLoadSeg() dos.library/CurrentDir dos.library/CurrentDir NAME CurrentDir -- Make a directory lock the current directory SYNOPSIS oldLock = CurrentDir( lock ) D0 D1 BPTR CurrentDir(BPTR) FUNCTION CurrentDir() causes a directory associated with a lock to be made the current directory. The old current directory lock is returned. A value of zero is a valid result here, this 0 lock represents the root of file system that you booted from. Any call that has to Open() or Lock() files (etc) requires that the current directory be a valid lock or 0. INPUTS lock - BCPL pointer to a lock RESULTS oldLock - BCPL pointer to a lock SEE ALSO Lock(), UnLock(), Open(), DupLock() dos.library/DateStamp dos.library/DateStamp NAME DateStamp -- Obtain the date and time in internal format SYNOPSIS ds = DateStamp( ds ); D0 D1 struct DateStamp *DateStamp(struct DateStamp *) FUNCTION DateStamp() takes a structure of three longwords that is set to the current time. The first element in the vector is a count of the number of days. The second element is the number of minutes elapsed in the day. The third is the number of ticks elapsed in the current minute. A tick happens 50 times a second. DateStamp() ensures that the day and minute are consistent. All three elements are zero if the date is unset. DateStamp() currently only returns even multiples of 50 ticks. Therefore the time you get is always an even number of ticks. Time is measured from Jan 1, 1978. INPUTS ds - pointer a struct DateStamp RESULTS The array is filled as described and returned (for pre-V36 compabability). SEE ALSO DateToStr(), StrToDate(), SetFileDate(), CompareDates() dos.library/DateToStr dos.library/DateToStr NAME DateToStr -- Converts a DateStamp to a string (V36) SYNOPSIS success = DateToStr( datetime ) D0 D1 BOOL DateToStr(struct DateTime *) FUNCTION StamptoStr converts an AmigaDOS DateStamp to a human readable ASCII string as requested by your settings in the DateTime structure. INPUTS DateTime - a pointer to an initialized DateTime structure. The DateTime structure should be initialized as follows: dat_Stamp - a copy of the datestamp you wish to convert to ascii. dat_Format - a format byte which specifies the format of the dat_StrDate. This can be any of the following (note: If value used is something other than those below, the default of FORMAT_DOS is used): FORMAT_DOS: AmigaDOS format (dd-mmm-yy). FORMAT_INT: International format (yy-mmm-dd). FORMAT_USA: American format (mm-dd-yy). FORMAT_CDN: Canadian format (dd-mm-yy). FORMAT_DEF: default format for locale. dat_Flags - a flags byte. The only flag which affects this function is: DTF_SUBST: If set, a string such as Today, Monday, etc., will be used instead of the dat_Format specification if possible. DTF_FUTURE: Ignored by this function. dat_StrDay - pointer to a buffer to receive the day of the week string. (Monday, Tuesday, etc.). If null, this string will not be generated. dat_StrDate - pointer to a buffer to receive the date string, in the format requested by dat_Format, subject to possible modifications by DTF_SUBST. If null, this string will not be generated. dat_StrTime - pointer to a buffer to receive the time of day string. If NULL, this will not be generated. RESULT success - a zero return indicates that the DateStamp was invalid, and could not be converted. Non-zero indicates that the call succeeded. SEE ALSO DateStamp(), StrtoDate(), <dos/datetime.h> dos.library/Delay dos.library/Delay NAME Delay -- Delay a process for a specified time SYNOPSIS Delay( ticks ) D1 void Delay(ULONG) FUNCTION The argument 'ticks' specifies how many ticks (50 per second) to wait before returning control. INPUTS ticks - integer BUGS Due to a bug in the timer.device in V1.2/V1.3, specifying a timeout of zero for Delay() can cause the unreliable timer & floppy disk operation. This is fixed in V36 and later. SEE ALSO dos.library/DeleteFile dos.library/DeleteFile NAME DeleteFile -- Delete a file or directory SYNOPSIS success = DeleteFile( name ) D0 D1 BOOL DeleteFile(STRPTR) FUNCTION This attempts to delete the file or directory specified by 'name'. An error is returned if the deletion fails. Note that all the files within a directory must be deleted before the directory itself can be deleted. INPUTS name - pointer to a null-terminated string RESULTS success - boolean SEE ALSO dos.library/DeleteVar dos.library/DeleteVar NAME DeleteVar -- Deletes a local or environment variable (V36) SYNOPSIS success = DeleteVar( name, flags ) D0 D1 D2 BOOL DeleteVar(STRPTR, ULONG ) FUNCTION Deletes a local or environment variable. INPUTS name - pointer to an variable name. Note variable names follow filesystem syntax and semantics. flags - combination of type of var to delete (low 8 bits), and flags to control the behavior of this routine. Currently defined flags include: GVF_LOCAL_ONLY - delete a local (to your process) variable. GVF_GLOBAL_ONLY - delete a global environment variable. The default is to delete a local variable if found, otherwise a global environment variable if found (only for LV_VAR). RESULT success - If non-zero, the variable was sucessfully deleted, FALSE indicates failure. BUGS LV_VAR is the only type that can be global SEE ALSO GetVar(), SetVar(), FindVar(), DeleteFile(), <dos/var.h> dos.library/DeviceProc dos.library/DeviceProc NAME DeviceProc -- Return the process MsgPort of specific I/O handler SYNOPSIS process = DeviceProc( name ) D0 D1 struct MsgPort *DeviceProc (STRPTR) FUNCTION DeviceProc() returns the process identifier of the process which handles the device associated with the specified name. If no process handler can be found then the result is zero. If the name refers to an assign then a directory lock is returned in IoErr(). This lock should not be UnLock()ed or Examine()ed (if you wish to do so, DupLock() it first). BUGS In V36, if you try to DeviceProc() something relative to an assign made with AssignPath(), it will fail. This is because there's no way to know when to unlock the lock. If you're writing code for V36 or later, it is highly advised you use GetDeviceProc() instead, or make your code conditional on V36 to use GetDeviceProc()/ FreeDeviceProc(). SEE ALSO GetDeviceProc(), FreeDeviceProc(), DupLock(), UnLock(), Examine() dos.library/DoPkt dos.library/DoPkt NAME DoPkt -- Send a dos packet and wait for reply (V36) SYNOPSIS result1 = DoPkt(port,action,arg1,arg2,arg3,arg4,arg5) D0 D1 D2 D3 D4 D5 D6 D7 LONG DoPkt(struct MsgPort *,LONG,LONG,LONG,LONG,LONG,LONG) FUNCTION Sends a packet to a handler and waits for it to return. Any secondary return will be available in D1 AND from IoErr(). DoPkt() will work even if the caller is an exec task and not a process; however it will be slower, and may fail for some additional reasons, such as being unable to allocate a signal. DoPkt() uses your pr_MsgPort for the reply, and will call pr_PktWait. (See BUGS regarding tasks, though). Only allows 5 arguments to be specified. For more arguments (packets support a maximum of 7) create a packet and use SendPkt()/WaitPkt(). INPUTS port - pr_MsgPort of the handler process to send to. action - the action requested of the filesystem/handler arg1, arg2, arg3, arg4,arg5 - arguments, depend on the action, may not be required. RESULT result1 - the value returned in dp_Res1, or FALSE if there was some problem in sending the packet or recieving it. result2 - Available from IoErr() AND in register D1. BUGS Using DoPkt() from tasks doesn't work in V36. Use AllocDosObject(), PutMsg(), and WaitPort()/GetMsg() for a workaround, or you can call CreateNewProc() to start a process to do Dos I/O for you. In V37, DoPkt() will allocate, use, and free the MsgPort required. NOTES Callable from a task (under V37 and above). SEE ALSO AllocDosObject(), FreeDosObject(), SendPkt(), WaitPkt(), CreateNewProc(), AbortPkt() dos.library/DupLock dos.library/DupLock NAME DupLock -- Duplicate a lock SYNOPSIS lock = DupLock( lock ) D0 D1 BPTR DupLock(BPTR) FUNCTION DupLock() is passed a shared filing system lock. This is the ONLY way to obtain a duplicate of a lock... simply copying is not allowed. Another lock to the same object is then returned. It is not possible to create a copy of a exclusive lock. A zero return indicates failure. INPUTS lock - BCPL pointer to a lock RESULTS newLock - BCPL pointer to a lock SEE ALSO Lock(), UnLock(), DupLockFromFH(), ParentOfFH() dos.library/DupLockFromFH dos.library/DupLockFromFH NAME DupLockFromFH -- Gets a lock on an open file (V36) SYNOPSIS lock = DupLockFromFH(fh) D0 D1 BPTR DupLockFromFH(BPTR) FUNCTION Obtain a lock on the object associated with fh. Only works if the file was opened using a non-exclusive mode. Other restrictions may be placed on success by the filesystem. INPUTS fh - Opened file for which to obtain the lock RESULT lock - Obtained lock or NULL for failure SEE ALSO DupLock(), Lock(), UnLock() dos.library/EndNotify dos.library/EndNotify NAME EndNotify -- Ends a notification request (V36) SYNOPSIS EndNotify(notifystructure) D1 VOID EndNotify(struct NotifyRequest *) FUNCTION Removes a notification request. Safe to call even if StartNotify() failed. For NRF_SEND_MESSAGE, it searches your port for any messages about the object in question and removes and replies them before returning. INPUTS notifystructure - a structure passed to StartNotify() SEE ALSO StartNotify(), <dos/notify.h> dos.library/ErrorReport dos.library/ErrorReport NAME ErrorReport -- Displays a Retry/Cancel requester for an error (V36) SYNOPSIS status = ErrorReport(code, type, arg1, device) D0 D1 D2 D3 D4 BOOL ErrorReport(LONG, LONG, ULONG, struct MsgPort *) FUNCTION Based on the request type, this routine formats the appropriate requester to be displayed. If the code is not understood, it returns DOS_TRUE immediately. Returns DOS_TRUE if the user selects CANCEL or if the attempt to put up the requester fails, or if the process pr_WindowPtr is -1. Returns FALSE if the user selects Retry. The routine will retry on DISKINSERTED for appropriate error codes. These return values are the opposite of what AutoRequest returns. Note: this routine sets IoErr() to code before returning. INPUTS code - Error code to put a requester up for. Current valid error codes are: ERROR_DISK_NOT_VALIDATED ERROR_DISK_WRITE_PROTECTED ERROR_DISK_FULL ERROR_DEVICE_NOT_MOUNTED ERROR_NOT_A_DOS_DISK ERROR_NO_DISK ABORT_DISK_ERROR /* read/write error */ ABORT_BUSY /* you MUST replace... */ type - Request type: REPORT_LOCK - arg1 is a lock (BPTR). REPORT_FH - arg1 is a filehandle (BPTR). REPORT_VOLUME - arg1 is a volumenode (C pointer). REPORT_INSERT - arg1 is the string for the volumename (will be split on a ':'). With ERROR_DEVICE_NOT_MOUNTED puts up the "Please insert..." requester. arg1 - variable parameter (see type) device - (Optional) Address of handler task for which report is to be made. Only required for REPORT_LOCK, and only if arg1==NULL. RESULT status - Cancel/Retry indicator (0 means Retry) SEE ALSO Fault(), IoErr() dos.library/ExAll dos.library/ExAll NAME ExAll -- Examine an entire directory (V36) SYNOPSIS continue = ExAll(lock, buffer, size, type, control) D0 D1 D2 D3 D4 D5 BOOL ExAll(BPTR,STRPTR,LONG,LONG,struct ExAllControl *) FUNCTION Examines an entire directory. Lock must be on a directory. Size is the size of the buffer supplied. The buffer will be filled with (partial) ExAllData structures, as specified by the type field. Type is a value from those shown below that determines which information is to be stored in the buffer. Each higher value adds a new thing to the list as described in the table below:- ED_NAME FileName ED_TYPE Type ED_SIZE Size in bytes ED_PROTECTION Protection bits ED_DATE 3 longwords of date ED_COMMENT Comment (will be NULL if no comment) ED_OWNER owner user-id and group-id (if supported) (V39) Thus, ED_NAME gives only filenames, and ED_OWNER gives everything. NOTE: V37 dos.library, when doing ExAll() emulation, and V37 filesystems will return an error if passed ED_OWNER. If you get ERROR_BAD_NUMBER, retry with ED_COMMENT to get everything but owner info. All filesystems supporting ExAll() must support through ED_COMMENT, and must check Type and return ERROR_BAD_NUMBER if they don't support the type. The ead_Next entry gives a pointer to the next entry in the buffer. The last entry will have NULL in ead_Next. The control structure is required so that FFS can keep track if more than one call to ExAll is required. This happens when there are more names in a directory than will fit into the buffer. The format of the control structure is as follows:- NOTE: the control structure MUST be allocated by AllocDosObject!!! Entries: This field tells the calling application how many entries are in the buffer after calling ExAll. Note: make sure your code handles the 0 entries case, including 0 entries with continue non-zero. LastKey: This field ABSOLUTELY MUST be initialised to 0 before calling ExAll for the first time. Any other value will cause nasty things to happen. If ExAll returns non-zero, then this field should not be touched before making the second and subsequent calls to ExAll. Whenever ExAll returns non-zero, there are more calls required before all names have been received. As soon as a FALSE return is received then ExAll has completed (if IoErr() returns ERROR_NO_MORE_ENTRIES - otherwise it returns the error that occured, similar to ExNext.) MatchString If this field is NULL then all filenames will be returned. If this field is non-null then it is interpreted as a pointer to a string that is used to pattern match all file names before accepting them and putting them into the buffer. The default AmigaDOS caseless pattern match routine is used. This string MUST have been parsed by ParsePatternNoCase()! MatchFunc: Contains a pointer to a hook for a routine to decide if the entry will be included in the returned list of entries. The entry is filled out first, and then passed to the hook. If no MatchFunc is to be called then this entry should be NULL. The hook is called with the following parameters (as is standard for hooks): BOOL = MatchFunc( hookptr, data, typeptr ) a0 a1 a2 (a0 = ptr to hook, a1 = ptr to filled in ExAllData, a2 = ptr to longword of type). MatchFunc should return FALSE if the entry is not to be accepted, otherwise return TRUE. Note that Dos will emulate ExAll() using Examine() and ExNext() if the handler in question doesn't support the ExAll() packet. INPUTS lock - Lock on directory to be examined. buffer - Buffer for data returned (MUST be at least word-aligned, preferably long-word aligned). size - Size in bytes of 'buffer'. type - Type of data to be returned. control - Control data structure (see notes above). MUST have been allocated by AllocDosObject! RESULT continue - Whether or not ExAll is done. If FALSE is returned, either ExAll has completed (IoErr() == ERROR_NO_MORE_ENTRIES), or an error occurred (check IoErr()). If non-zero is returned, you MUST call ExAll again until it returns FALSE. EXAMPLE eac = AllocDosObject(DOS_EXALLCONTROL,NULL); if (!eac) ... ... eac->eac_LastKey = 0; do { more = ExAll(lock, EAData, sizeof(EAData), ED_FOO, eac); if ((!more) && (IoErr() != ERROR_NO_MORE_ENTRIES)) { \* ExAll failed abnormally *\ break; } if (eac->eac_Entries == 0) { \* ExAll failed normally with no entries *\ continue; \* ("more" is *usually* zero) *\ } ead = (struct ExAllData *) EAData; do { \* use ead here *\ ... \* get next ead *\ ead = ead->ed_Next; } while (ead); } while (more); ... FreeDosObject(DOS_EXALLCONTROL,eac); BUGS In V36, there were problems with ExAll (particularily with eac_MatchString, and ed_Next with the ramdisk and the emulation of it in Dos for handlers that do not support the packet. It is advised you only use this under V37 and later. See note above regarding extensions to the Type parameter. SEE ALSO Examine(), ExNext(), ExamineFH(), MatchPatternNoCase(), ParsePatternNoCase(), AllocDosObject(), ExAllEnd() dos.library/ExAllEnd dos.library/ExAllEnd NAME ExAllEnd -- Stop an ExAll() (V39) SYNOPSIS ExAllEnd(lock, buffer, size, type, control) D1 D2 D3 D4 D5 ExAllEnd(BPTR,STRPTR,LONG,LONG,struct ExAllControl *) FUNCTION Stops an ExAll() on a directory before it hits NO_MORE_ENTRIES. The full set of arguments that had been passed to ExAll() must be passed to ExAllEnd(), so it can handle filesystems that can't abort an ExAll() directly. INPUTS lock - Lock on directory to be examined. buffer - Buffer for data returned (MUST be at least word-aligned, preferably long-word aligned). size - Size in bytes of 'buffer'. type - Type of data to be returned. control - Control data structure (see notes above). MUST have been allocated by AllocDosObject! SEE ALSO ExAll(), AllocDosObject() dos.library/Examine dos.library/Examine NAME Examine -- Examine a directory or file associated with a lock SYNOPSIS success = Examine( lock, FileInfoBlock ) D0 D1 D2 BOOL Examine(BPTR,struct FileInfoBlock *) FUNCTION Examine() fills in information in the FileInfoBlock concerning the file or directory associated with the lock. This information includes the name, size, creation date and whether it is a file or directory. FileInfoBlock must be longword aligned. Examine() gives a return code of zero if it fails. You may make a local copy of the FileInfoBlock, as long as it is never passed to ExNext(). INPUTS lock - BCPL pointer to a lock infoBlock - pointer to a FileInfoBlock (MUST be longword aligned) RESULTS success - boolean SPECIAL NOTE FileInfoBlock must be longword-aligned. AllocDosObject() will allocate them correctly for you. SEE ALSO Lock(), UnLock(), ExNext(), ExamineFH(), <dos/dos.h>, AllocDosObject(), ExAll() dos.library/ExamineFH dos.library/ExamineFH NAME ExamineFH -- Gets information on an open file (V36) SYNOPSIS success = ExamineFH(fh, fib) D0 D1 D2 BOOL ExamineFH(BPTR, struct FileInfoBlock *) FUNCTION Examines a filehandle and returns information about the file in the FileInfoBlock. There are no guarantees as to whether the fib_Size field will reflect any changes made to the file size it was opened, though filesystems should attempt to provide up-to-date information for it. INPUTS fh - Filehandle you wish to examine fib - FileInfoBlock, must be longword aligned. RESULT success - Success/failure indication SEE ALSO Examine(), ExNext(), ExAll(), Open(), AllocDosObject() dos.library/Execute dos.library/Execute NAME Execute -- Execute a CLI command SYNOPSIS success = Execute( commandString, input, output ) D0 D1 D2 D3 BOOL Execute(STRPTR, BPTR, BPTR) FUNCTION This function attempts to execute the string commandString as a Shell command and arguments. The string can contain any valid input that you could type directly in a Shell, including input and output redirection using < and >. Note that Execute() doesn't return until the command(s) in commandstring have returned. The input file handle will normally be zero, and in this case Execute() will perform whatever was requested in the commandString and then return. If the input file handle is nonzero then after the (possibly empty) commandString is performed subsequent input is read from the specified input file handle until end of that file is reached. In most cases the output file handle must be provided, and is used by the Shell commands as their output stream unless output redirection was specified. If the output file handle is set to zero then the current window, normally specified as *, is used. Note that programs running under the Workbench do not normally have a current window. Execute() may also be used to create a new interactive Shell process just like those created with the NewShell command. In order to do this you would call Execute() with an empty commandString, and pass a file handle relating to a new window as the input file handle. The output file handle would be set to zero. The Shell will read commands from the new window, and will use the same window for output. This new Shell window can only be terminated by using the EndCLI command. Under V37, if an input filehandle is passed, and it's either interactive or a NIL: filehandle, the pr_ConsoleTask of the new process will be set to that filehandle's process (the same applies to SystemTagList()). For this command to work the program Run must be present in C: in versions before V36 (except that in 1.3.2 and any later 1.3 versions, the system first checks the resident list for Run). INPUTS commandString - pointer to a null-terminated string input - BCPL pointer to a file handle output - BCPL pointer to a file handle RESULTS success - BOOLEAN indicating whether Execute was successful in finding and starting the specified program. Note this is NOT the return code of the command(s). SEE ALSO SystemTagList(), NewShell, EndCLI, Run dos.library/Exit dos.library/Exit NAME Exit -- Exit from a program SYNOPSIS Exit( returnCode ) D1 void Exit(LONG) FUNCTION Exit() is currently for use with programs written as if they were BCPL programs. This function is not normally useful for other purposes. In general, therefore, please DO NOT CALL THIS FUNCTION! In order to exit, C programs should use the C language exit() function (note the lower case letter "e"). Assembly programs should place a return code in D0, and execute an RTS instruction with their original stack ptr. IMPLEMENTATION The action of Exit() depends on whether the program which called it is running as a command under a CLI or not. If the program is running under the CLI the command finishes and control reverts to the CLI. In this case, returnCode is interpreted as the return code from the program. If the program is running as a distinct process, Exit() deletes the process and release the space associated with the stack, segment list and process structure. INPUTS returnCode - integer SEE ALSO CreateProc(), CreateNewProc() dos.library/ExNext dos.library/ExNext NAME ExNext -- Examine the next entry in a directory SYNOPSIS success = ExNext( lock, FileInfoBlock ) D0 D1 D2 BOOL ExNext(BPTR, struct FileInfoBlock *) FUNCTION This routine is passed a directory lock and a FileInfoBlock that have been initialized by a previous call to Examine(), or updated by a previous call to ExNext(). ExNext() gives a return code of zero on failure. The most common cause of failure is reaching the end of the list of files in the owning directory. In this case, IoErr will return ERROR_NO_MORE_ENTRIES and a good exit is appropriate. So, follow these steps to examine a directory: 1) Pass a Lock and a FileInfoBlock to Examine(). The lock must be on the directory you wish to examine. 2) Pass ExNext() the same lock and FileInfoBlock. 3) Do something with the information returned in the FileInfoBlock. Note that the fib_DirEntryType field is positive for directories, negative for files. 4) Keep calling ExNext() until it returns FALSE. Check IoErr() to ensure that the reason for failure was ERROR_NO_MORE_ENTRIES. Note: if you wish to recursively scan the file tree and you find another directory while ExNext()ing you must Lock that directory and Examine() it using a new FileInfoBlock. Use of the same FileInfoBlock to enter a directory would lose important state information such that it will be impossible to continue scanning the parent directory. While it is permissible to UnLock() and Lock() the parent directory between ExNext() calls, this is NOT recommended. Important state information is associated with the parent lock, so if it is freed between ExNext() calls this information has to be rebuilt on each new ExNext() call, and will significantly slow down directory scanning. It is NOT legal to Examine() a file, and then to ExNext() from that FileInfoBlock. You may make a local copy of the FileInfoBlock, as long as it is never passed back to the operating system. INPUTS lock - BCPL pointer to a lock originally used for the Examine() call infoBlock - pointer to a FileInfoBlock used on the previous Examine() or ExNext() call. RESULTS success - boolean SPECIAL NOTE FileInfoBlock must be longword-aligned. AllocDosObject() will allocate them correctly for you. SEE ALSO Examine(), Lock(), UnLock(), IoErr(), ExamineFH(), AllocDosObject(), ExAll() dos.library/Fault dos.library/Fault NAME Fault -- Returns the text associated with a DOS error code (V36) SYNOPSIS len = Fault(code, header, buffer, len) D0 D1 D2 D3 D4 LONG Fault(LONG, STRPTR, STRPTR, LONG) FUNCTION This routine obtains the error message text for the given error code. The header is prepended to the text of the error message, followed by a colon. Puts a null-terminated string for the error message into the buffer. By convention, error messages should be no longer than 80 characters (+1 for termination), and preferably no more than 60. The value returned by IoErr() is set to the code passed in. If there is no message for the error code, the message will be "Error code <number>\n". The number of characters put into the buffer is returned, which will be 0 if the code passed in was 0. INPUTS code - Error code header - header to output before error text buffer - Buffer to receive error message. len - Length of the buffer. RESULT len - number of characters put into buffer (may be 0) SEE ALSO IoErr(), SetIoErr(), PrintFault() BUGS In older documentation, the return was shown as BOOL success. This was incorrect, it has always returned the length. dos.library/FGetC dos.library/FGetC NAME FGetC -- Read a character from the specified input (buffered) (V36) SYNOPSIS char = FGetC(fh) D0 D1 LONG FGetC(BPTR) FUNCTION Reads the next character from the input stream. A -1 is returned when EOF or an error is encountered. This call is buffered. Use Flush() between buffered and unbuffered I/O on a filehandle. INPUTS fh - filehandle to use for buffered I/O RESULT char - character read (0-255) or -1 BUGS In V36, after an EOF was read, EOF would always be returned from FGetC() from then on. Starting in V37, it tries to read from the handler again each time (unless UnGetC(fh,-1) was called). SEE ALSO FPutC(), UnGetC(), Flush() dos.library/FGets dos.library/FGets NAME FGets -- Reads a line from the specified input (buffered) (V36) SYNOPSIS buffer = FGets(fh, buf, len) D0 D1 D2 D3 STRPTR FGets(BPTR, STRPTR, ULONG) FUNCTION This routine reads in a single line from the specified input stopping at a NEWLINE character or EOF. In either event, UP TO the number of len specified bytes minus 1 will be copied into the buffer. Hence if a length of 50 is passed and the input line is longer than 49 bytes, it will return 49 characters. It returns the buffer pointer normally, or NULL if EOF is the first thing read. If terminated by a newline, the newline WILL be the last character in the buffer. This is a buffered read routine. The string read in IS null-terminated. INPUTS fh - filehandle to use for buffered I/O buf - Area to read bytes into. len - Number of bytes to read, must be > 0. RESULT buffer - Pointer to buffer passed in, or NULL for immediate EOF or for an error. If NULL is returnd for an EOF, IoErr() will return 0. BUGS In V36 and V37, it copies one more byte than it should if it doesn't hit an EOF or newline. In the example above, it would copy 50 bytes and put a null in the 51st. This is fixed in dos V39. Workaround for V36/V37: pass in buffersize-1. SEE ALSO FRead(), FPuts(), FGetC() dos.library/FilePart dos.library/FilePart NAME FilePart -- Returns the last component of a path (V36) SYNOPSIS fileptr = FilePart( path ) D0 D1 STRPTR FilePart( STRPTR ) FUNCTION This function returns a pointer to the last component of a string path specification, which will normally be the file name. If there is only one component, it returns a pointer to the beginning of the string. INPUTS path - pointer to an path string. May be relative to the current directory or the current disk. RESULT fileptr - pointer to the last component of the path. EXAMPLE FilePart("xxx:yyy/zzz/qqq") would return a pointer to the first 'q'. FilePart("xxx:yyy") would return a pointer to the first 'y'). SEE ALSO PathPart(), AddPart() dos.library/FindArg dos.library/FindArg NAME FindArg - find a keyword in a template (V36) SYNOPSIS index = FindArg(template, keyword) D0 D1 D2 LONG FindArg(STRPTR, STRPTR) FUNCTION Returns the argument number of the keyword, or -1 if it is not a keyword for the template. Abbreviations are handled. INPUTS keyword - keyword to search for in template template - template string to search RESULT index - number of entry in template, or -1 if not found BUGS In earlier published versions of the autodoc, keyword and template were backwards. SEE ALSO ReadArgs(), ReadItem(), FreeArgs() dos.library/FindCliProc dos.library/FindCliProc NAME FindCliProc -- returns a pointer to the requested CLI process (V36) SYNOPSIS proc = FindCliProc(num) D0 D1 struct Process *FindCliProc(ULONG) FUNCTION This routine returns a pointer to the CLI process associated with the given CLI number. If the process isn't an active CLI process, NULL is returned. NOTE: should normally be called inside a Forbid(), if you must use this function at all. INPUTS num - Task number of CLI process (range 1-N) RESULT proc - Pointer to given CLI process SEE ALSO Cli(), Forbid(), MaxCli() dos.library/FindDosEntry dos.library/FindDosEntry NAME FindDosEntry -- Finds a specific Dos List entry (V36) SYNOPSIS newdlist = FindDosEntry(dlist,name,flags) D0 D1 D2 D3 struct DosList *FindDosEntry(struct DosList *,STRPTR,ULONG) FUNCTION Locates an entry on the device list. Starts with the entry dlist. NOTE: must be called with the device list locked, no references may be made to dlist after unlocking. INPUTS dlist - The device entry to start with. name - Name of device entry (without ':') to locate. flags - Search control flags. Use the flags you passed to LockDosList, or a subset of them. LDF_READ/LDF_WRITE are not required for this call. RESULT newdlist - The device entry or NULL SEE ALSO AddDosEntry(), RemDosEntry(), NextDosEntry(), LockDosList(), MakeDosEntry(), FreeDosEntry() dos.library/FindSegment dos.library/FindSegment NAME FindSegment - Finds a segment on the resident list (V36) SYNOPSIS segment = FindSegment(name, start, system) D0 D1 D2 D3 struct Segment *FindSegment(STRPTR, struct Segment *, LONG) FUNCTION Finds a segment on the Dos resident list by name and type, starting at the segment AFTER 'start', or at the beginning if start is NULL. If system is zero, it will only return nodes with a seg_UC of 0 or more. It does NOT increment the seg_UC, and it does NOT do any locking of the list. You must Forbid() lock the list to use this call. To use an entry you have found, you must: if the seg_UC is 0 or more, increment it, and decrement it (under Forbid()!) when you're done the the seglist. The other values for seg_UC are: -1 - system module, such as a filesystem or shell -2 - resident shell command -999 - disabled internal command, ignore Negative values should never be modified. All other negative values between 0 and -32767 are reserved to AmigaDos and should not be used. INPUTS name - name of segment to find start - segment to start the search after system - true for system segment, false for normal segments RESULT segment - the segment found or NULL SEE ALSO AddSegment(), RemSegment(), Forbid() dos.library/FindVar dos.library/FindVar NAME FindVar -- Finds a local variable (V36) SYNOPSIS var = FindVar( name, type ) D0 D1 D2 struct LocalVar * FindVar(STRPTR, ULONG ) FUNCTION Finds a local variable structure. INPUTS name - pointer to an variable name. Note variable names follow filesystem syntax and semantics. type - type of variable to be found (see <dos/var.h>) RESULT var - pointer to a LocalVar structure or NULL SEE ALSO GetVar(), SetVar(), DeleteVar(), <dos/var.h> dos.library/Flush dos.library/Flush NAME Flush -- Flushes buffers for a buffered filehandle (V36) SYNOPSIS success = Flush(fh) D0 D1 LONG Flush(BPTR) FUNCTION Flushes any pending buffered writes to the filehandle. All buffered writes will also be flushed on Close(). If the filehandle was being used for input, it drops the buffer, and tries to Seek() back to the last read position (so subsequent reads or writes will occur at the expected position in the file). INPUTS fh - Filehandle to flush. RESULT success - Success or failure. BUGS Before V37 release, Flush() returned a random value. As of V37, it always returns success (this will be fixed in some future release). The V36 and V37 releases didn't properly flush filehandles which have never had a buffered IO done on them. This commonly occurs on redirection of input of a command, or when opening a file for input and then calling CreateNewProc() with NP_Arguments, or when using a new filehandle with SelectInput() and then calling RunCommand(). This is fixed in V39. A workaround would be to do FGetC(), then UnGetC(), then Flush(). SEE ALSO FputC(), FGetC(), UnGetC(), Seek(), Close(), CreateNewProc(), SelectInput(), RunCommand() dos.library/Format dos.library/Format NAME Format -- Causes a filesystem to initialize itself (V36) SYNOPSIS success = Format(filesystem, volumename, dostype) D0 D1 D2 D3 BOOL Format(STRPTR, STRPTR, ULONG) FUNCTION Interface for initializing new media on a device. This causes the filesystem to write out an empty disk structure to the media, which should then be ready for use. This assumes the media has been low- level formatted and verified already. The filesystem should be inhibited before calling Format() to make sure you don't get an ERROR_OBJECT_IN_USE. INPUTS filesystem - Name of device to be formatted. ':' must be supplied. volumename - Name for volume (if supported). No ':'. dostype - Type of format, if filesystem supports multiple types. RESULT success - Success/failure indicator. BUGS Existed, but was non-functional in V36 dos. (The volumename wasn't converted to a BSTR.) Workaround: require V37, or under V36 convert volumename to a BPTR to a BSTR before calling Format(). Note: a number of printed packet docs for ACTION_FORMAT are wrong as to the arguments. SEE ALSO dos.library/FPutC dos.library/FPutC NAME FPutC -- Write a character to the specified output (buffered) (V36) SYNOPSIS char = FPutC(fh, char) D0 D1 D2 LONG FPutC(BPTR, LONG) FUNCTION Writes a single character to the output stream. This call is buffered. Use Flush() between buffered and unbuffered I/O on a filehandle. Interactive filehandles are flushed automatically on a newline, return, '\0', or line feed. INPUTS fh - filehandle to use for buffered I/O char - character to write RESULT char - either the character written, or EOF for an error. BUGS Older autodocs indicated that you should pass a UBYTE. The correct usage is to pass a LONG in the range 0-255. SEE ALSO FGetC(), UnGetC(), Flush() dos.library/FPuts dos.library/FPuts NAME FPuts -- Writes a string the the specified output (buffered) (V36) SYNOPSIS error = FPuts(fh, str) D0 D1 D2 LONG FPuts(BPTR, STRPTR) FUNCTION This routine writes an unformatted string to the filehandle. No newline is appended to the string. This routine is buffered. INPUTS fh - filehandle to use for buffered I/O str - Null-terminated string to be written to default output RESULT error - 0 normally, otherwise -1. Note that this is opposite of most other Dos functions, which return success. SEE ALSO FGets(), FPutC(), FWrite(), PutStr() dos.library/FRead dos.library/FRead NAME FRead -- Reads a number of blocks from an input (buffered) (V36) SYNOPSIS count = FRead(fh, buf, blocklen, blocks) D0 D1 D2 D3 D4 LONG FRead(BPTR, STRPTR, ULONG, ULONG) FUNCTION Attempts to read a number of blocks, each blocklen long, into the specified buffer from the input stream. May return less than the number of blocks requested, either due to EOF or read errors. This call is buffered. INPUTS fh - filehandle to use for buffered I/O buf - Area to read bytes into. blocklen - number of bytes per block. Must be > 0. blocks - number of blocks to read. Must be > 0. RESULT count - Number of _blocks_ read, or 0 for EOF. On an error, the number of blocks actually read is returned. BUGS Doesn't clear IoErr() before starting. If you want to find out about errors, use SetIoErr(0L) before calling. SEE ALSO FGetC(), FWrite(), FGets() dos.library/FreeArgs dos.library/FreeArgs NAME FreeArgs - Free allocated memory after ReadArgs() (V36) SYNOPSIS FreeArgs(rdargs) D1 void FreeArgs(struct RDArgs *) FUNCTION Frees memory allocated to return arguments in from ReadArgs(). If ReadArgs allocated the RDArgs structure it will be freed. If NULL is passed in this function does nothing. INPUTS rdargs - structure returned from ReadArgs() or NULL. SEE ALSO ReadArgs(), ReadItem(), FindArg() dos.library/FreeDeviceProc dos.library/FreeDeviceProc NAME FreeDeviceProc -- Releases port returned by GetDeviceProc() (V36) SYNOPSIS FreeDeviceProc(devproc) D1 void FreeDeviceProc(struct DevProc *) FUNCTION Frees up the structure created by GetDeviceProc(), and any associated temporary locks. Decrements the counter incremented by GetDeviceProc(). The counter is in an extension to the 1.3 process structure. After calling FreeDeviceProc(), do not use the port or lock again! It is safe to call FreeDeviceProc(NULL). INPUTS devproc - A value returned by GetDeviceProc() BUGS Counter not currently active in 2.0. SEE ALSO GetDeviceProc(), DeviceProc(), AssignLock(), AssignLate(), AssignPath() dos.library/FreeDosEntry dos.library/FreeDosEntry NAME FreeDosEntry -- Frees an entry created by MakeDosEntry (V36) SYNOPSIS FreeDosEntry(dlist) D1 void FreeDosEntry(struct DosList *) FUNCTION Frees an entry created by MakeDosEntry(). This routine should be eliminated and replaced by a value passed to FreeDosObject()! INPUTS dlist - DosList to free. SEE ALSO AddDosEntry(), RemDosEntry(), FindDosEntry(), LockDosList(), NextDosEntry(), MakeDosEntry() dos.library/FreeDosObject dos.library/FreeDosObject NAME FreeDosObject -- Frees an object allocated by AllocDosObject() (V36) SYNOPSIS FreeDosObject(type, ptr) D1 D2 void FreeDosObject(ULONG, void *) FUNCTION Frees an object allocated by AllocDosObject(). Do NOT call for objects allocated in any other way. INPUTS type - type passed to AllocDosObject() ptr - ptr returned by AllocDosObject() BUGS Before V39, DOS_CLI objects will only have the struct CommandLineInterface freed, not the strings it points to. This is fixed in V39 dos. Before V39, you can workaround this bug by using FreeVec() on cli_SetName, cli_CommandFile, cli_CommandName, and cli_Prompt, and then setting them all to NULL. In V39 or above, do NOT use the workaround. SEE ALSO AllocDosObject(), FreeVec(), <dos/dos.h> dos.library/FWrite dos.library/FWrite NAME FWrite -- Writes a number of blocks to an output (buffered) (V36) SYNOPSIS count = FWrite(fh, buf, blocklen, blocks) D0 D1 D2 D3 D4 LONG FWrite(BPTR, STRPTR, ULONG, ULONG) FUNCTION Attempts to write a number of blocks, each blocklen long, from the specified buffer to the output stream. May return less than the number of blocks requested, if there is some error such as a full disk or r/w error. This call is buffered. INPUTS fh - filehandle to use for buffered I/O buf - Area to write bytes from. blocklen - number of bytes per block. Must be > 0. blocks - number of blocks to read. Must be > 0. RESULT count - Number of _blocks_ written. On an error, the number of blocks actually written is returned. BUGS Doesn't clear IoErr() before starting. If you want to find out about errors, use SetIoErr(0L) before calling. SEE ALSO FPutC(), FRead(), FPuts() dos.library/GetArgStr dos.library/GetArgStr NAME GetArgStr -- Returns the arguments for the process (V36) SYNOPSIS ptr = GetArgStr() D0 STRPTR GetArgStr(void) FUNCTION Returns a pointer to the (null-terminated) arguments for the program (process). This is the same string passed in a0 on startup from CLI. RESULT ptr - pointer to arguments SEE ALSO SetArgStr(), RunCommand() dos.library/GetConsoleTask dos.library/GetConsoleTask NAME GetConsoleTask -- Returns the default console for the process (V36) SYNOPSIS port = GetConsoleTask() D0 struct MsgPort *GetConsoleTask(void) FUNCTION Returns the default console task's port (pr_ConsoleTask) for the current process. RESULT port - The pr_MsgPort of the console handler, or NULL. SEE ALSO SetConsoleTask(), Open() dos.library/GetCurrentDirName dos.library/GetCurrentDirName NAME GetCurrentDirName -- returns the current directory name (V36) SYNOPSIS success = GetCurrentDirName(buf, len) D0 D1 D2 BOOL GetCurrentDirName(STRPTR, LONG) FUNCTION Extracts the current directory name from the CLI structure and puts it into the buffer. If the buffer is too small, the name is truncated appropriately and a failure code returned. If no CLI structure is present, a null string is returned in the buffer, and failure from the call (with IoErr() == ERROR_OBJECT_WRONG_TYPE); INPUTS buf - Buffer to hold extracted name len - Number of bytes of space in buffer RESULT success - Success/failure indicator BUGS In V36, this routine didn't handle 0-length buffers correctly. SEE ALSO SetCurrentDirName() dos.library/GetDeviceProc dos.library/GetDeviceProc NAME GetDeviceProc -- Finds a handler to send a message to (V36) SYNOPSIS devproc = GetDeviceProc(name, devproc) D0 D1 D2 struct DevProc *GetDeviceProc(STRPTR, struct DevProc *) FUNCTION Finds the handler/filesystem to send packets regarding 'name' to. This may involve getting temporary locks. It returns a structure that includes a lock and msgport to send to to attempt your operation. It also includes information on how to handle multiple-directory assigns (by passing the DevProc back to GetDeviceProc() until it returns NULL). The initial call to GetDeviceProc() should pass NULL for devproc. If after using the returned DevProc, you get an ERROR_OBJECT_NOT_FOUND, and (devproc->dvp_Flags & DVPF_ASSIGN) is true, you should call GetDeviceProc() again, passing it the devproc structure. It will either return a modified devproc structure, or NULL (with ERROR_NO_MORE_ENTRIES in IoErr()). Continue until it returns NULL. This call also increments the counter that locks a handler/fs into memory. After calling FreeDeviceProc(), do not use the port or lock again! INPUTS name - name of the object you wish to access. This can be a relative path ("foo/bar"), relative to the current volume (":foo/bar"), or relative to a device/volume/assign ("foo:bar"). devproc - A value returned by GetDeviceProc() before, or NULL RESULT devproc - a pointer to a DevProc structure or NULL BUGS Counter not currently active in 2.0. In 2.0 and 2.01, you HAD to check DVPF_ASSIGN before calling it again. This was fixed for the 2.02 release of V36. SEE ALSO FreeDeviceProc(), DeviceProc(), AssignLock(), AssignLate(), AssignPath() dos.library/GetFileSysTask dos.library/GetFileSysTask NAME GetFileSysTask -- Returns the default filesystem for the process (V36) SYNOPSIS port = GetFileSysTask() D0 struct MsgPort *GetFileSysTask(void) FUNCTION Returns the default filesystem task's port (pr_FileSystemTask) for the current process. RESULT port - The pr_MsgPort of the filesystem, or NULL. SEE ALSO SetFileSysTask(), Open() dos.library/GetProgramDir dos.library/GetProgramDir NAME GetProgramDir -- Returns a lock on the directory the program was loaded from (V36) SYNOPSIS lock = GetProgramDir() D0 BPTR GetProgramDir(void) FUNCTION Returns a shared lock on the directory the program was loaded from. This can be used for a program to find data files, etc, that are stored with the program, or to find the program file itself. NULL returns are valid, and may occur, for example, when running a program from the resident list. You should NOT unlock the lock. RESULT lock - A lock on the directory the current program was loaded from, or NULL if loaded from resident list, etc. BUGS Should return a lock for things loaded via resident. Perhaps should return currentdir if NULL. SEE ALSO SetProgramDir(), Open() dos.library/GetProgramName dos.library/GetProgramName NAME GetProgramName -- Returns the current program name (V36) SYNOPSIS success = GetProgramName(buf, len) D0 D1 D2 BOOL GetProgramName(STRPTR, LONG) FUNCTION Extracts the program name from the CLI structure and puts it into the buffer. If the buffer is too small, the name is truncated. If no CLI structure is present, a null string is returned in the buffer, and failure from the call (with IoErr() == ERROR_OBJECT_WRONG_TYPE); INPUTS buf - Buffer to hold extracted name len - Number of bytes of space in buffer RESULT success - Success/failure indicator SEE ALSO SetProgramName() dos.library/GetPrompt dos.library/GetPrompt NAME GetPrompt -- Returns the prompt for the current process (V36) SYNOPSIS success = GetPrompt(buf, len) D0 D1 D2 BOOL GetPrompt(STRPTR, LONG) FUNCTION Extracts the prompt string from the CLI structure and puts it into the buffer. If the buffer is too small, the string is truncated appropriately and a failure code returned. If no CLI structure is present, a null string is returned in the buffer, and failure from the call (with IoErr() == ERROR_OBJECT_WRONG_TYPE); INPUTS buf - Buffer to hold extracted prompt len - Number of bytes of space in buffer RESULT success - Success/failure indicator SEE ALSO SetPrompt() dos.library/GetVar dos.library/GetVar NAME GetVar -- Returns the value of a local or global variable (V36) SYNOPSIS len = GetVar( name, buffer, size, flags ) D0 D1 D2 D3 D4 LONG GetVar( STRPTR, STRPTR, LONG, ULONG ) FUNCTION Gets the value of a local or environment variable. It is advised to only use ASCII strings inside variables, but not required. This stops putting characters into the destination when a \n is hit, unless GVF_BINARY_VAR is specified. (The \n is not stored in the buffer.) INPUTS name - pointer to a variable name. buffer - a user allocated area which will be used to store the value associated with the variable. size - length of the buffer region in bytes. flags - combination of type of var to get value of (low 8 bits), and flags to control the behavior of this routine. Currently defined flags include: GVF_GLOBAL_ONLY - tries to get a global env variable. GVF_LOCAL_ONLY - tries to get a local variable. GVF_BINARY_VAR - don't stop at \n GVF_DONT_NULL_TERM - no null termination (only valid for binary variables). (V37) The default is to try to get a local variable first, then to try to get a global environment variable. RESULT len - Size of environment variable. -1 indicates that the variable was not defined (if IoErr() returns ERROR_OBJECT_NOT_FOUND - it returns ERROR_BAD_NUMBER if you specify a size of 0). If the value would overflow the user buffer, the buffer is truncated. The buffer returned is null-terminated (even if GVF_BINARY_VAR is used, unless GVF_DONT_NULL_TERM is in effect). The number of characters put in the buffer (not including null termination) is returned, and IoErr() will return the the size of the variable on success. BUGS LV_VAR is the only type that can be global. Under V36, we documented (and it returned) the size of the variable, not the number of characters transferred. For V37 this was changed to the number of characters put in the buffer, and the total size of the variable is put in IoErr(). GVF_DONT_NULL_TERM only works for local variables under V37. For V39, it also works for globals. SEE ALSO SetVar(), DeleteVar(), FindVar(), <dos/var.h> dos.library/Info dos.library/Info NAME Info -- Returns information about the disk SYNOPSIS success = Info( lock, parameterBlock ) D0 D1 D2 BOOL Info(BPTR, struct InfoData *) FUNCTION Info() can be used to find information about any disk in use. 'lock' refers to the disk, or any file on the disk. The parameter block is returned with information about the size of the disk, number of free blocks and any soft errors. INPUTS lock - BCPL pointer to a lock parameterBlock - pointer to an InfoData structure (longword aligned) RESULTS success - boolean SPECIAL NOTE: Note that InfoData structure must be longword aligned. dos.library/Inhibit dos.library/Inhibit NAME Inhibit -- Inhibits access to a filesystem (V36) SYNOPSIS success = Inhibit(filesystem, flag) D0 D1 D2 BOOL Inhibit(STRPTR,LONG) FUNCTION Sends an ACTION_INHIBIT packet to the indicated handler. This stops all activity by the handler until uninhibited. When uninhibited, anything may have happened to the disk in the drive, or there may no longer be one. INPUTS filesystem - Name of device to inhibit (with ':') flag - New status. DOSTRUE = inhibited, FALSE = uninhibited RESULT success - Success/failure indicator SEE ALSO dos.library/Input dos.library/Input NAME Input -- Identify the program's initial input file handle SYNOPSIS file = Input() D0 BPTR Input(void) FUNCTION Input() is used to identify the initial input stream allocated when the program was initiated. Never close the filehandle returned by Input! RESULTS file - BCPL pointer to a file handle SEE ALSO Output(), SelectInput() dos.library/InternalLoadSeg dos.library/InternalLoadSeg NAME InternalLoadSeg -- Low-level load routine (V36) SYNOPSIS seglist = InternalLoadSeg(fh,table,functionarray,stack) D0 D0 A0 A1 A2 BPTR InternalLoadSeg(BPTR,BPTR,LONG *,LONG *) FUNCTION Loads from fh. Table is used when loading an overlay, otherwise should be NULL. Functionarray is a pointer to an array of functions. Note that the current Seek position after loading may be at any point after the last hunk loaded. The filehandle will not be closed. If a stacksize is encoded in the file, the size will be stuffed in the LONG pointed to by stack. This LONG should be initialized to your default value: InternalLoadSeg() will not change it if no stacksize is found. Clears unused portions of Code and Data hunks (as well as BSS hunks). (This also applies to LoadSeg() and NewLoadSeg()). If the file being loaded is an overlaid file, this will return -(seglist). All other results will be positive. NOTE to overlay users: InternalLoadSeg() does NOT return seglist in both D0 and D1, as LoadSeg does. The current ovs.asm uses LoadSeg(), and assumes returns are in D1. We will support this for LoadSeg() ONLY. INPUTS fh - Filehandle to load from. table - When loading an overlay, otherwise ignored. functionarray - Array of function to be used for read, alloc, and free. FuncTable[0] -> Actual = ReadFunc(readhandle,buffer,length),DOSBase D0 D1 A0 D0 A6 FuncTable[1] -> Memory = AllocFunc(size,flags), Execbase D0 D0 D1 a6 FuncTable[2] -> FreeFunc(memory,size), Execbase A1 D0 a6 stack - Pointer to storage (ULONG) for stacksize. RESULT seglist - Seglist loaded or NULL. NOT returned in D1! BUGS Really should use tags. SEE ALSO LoadSeg(), UnLoadSeg(), NewLoadSeg(), InternalUnLoadSeg() dos.library/InternalUnLoadSeg dos.library/InternalUnLoadSeg NAME InternalUnLoadSeg -- Unloads a seglist loaded with InternalLoadSeg() (V36) SYNOPSIS success = InternalUnLoadSeg(seglist,FreeFunc) D0 D1 A1 BOOL InternalUnLoadSeg(BPTR,void (*)(STRPTR,ULONG)) FUNCTION Unloads a seglist using freefunc to free segments. Freefunc is called as for InternalLoadSeg. NOTE: will call Close() for overlaid seglists. INPUTS seglist - Seglist to be unloaded FreeFunc - Function called to free memory RESULT success - returns whether everything went OK (since this may close files). Also returns FALSE if seglist was NULL. BUGS Really should use tags SEE ALSO LoadSeg(), UnLoadSeg(), InternalLoadSeg(), NewUnLoadSeg(), Close() dos.library/IoErr dos.library/IoErr NAME IoErr -- Return extra information from the system SYNOPSIS error = IoErr() D0 LONG IoErr(void) FUNCTION Most I/O routines return zero to indicate an error. When this happens (or whatever the defined error return for the routine) this routine may be called to determine more information. It is also used in some routines to pass back a secondary result. Note: there is no guarantee as to the value returned from IoErr() after a successful operation, unless to specified by the routine. RESULTS error - integer SEE ALSO Fault(), PrintFault(), SetIoErr() dos.library/IsFileSystem dos.library/IsFileSystem NAME IsFileSystem -- returns whether a Dos handler is a filesystem (V36) SYNOPSIS result = IsFileSystem(name) D0 D1 BOOL IsFileSystem(STRPTR) FUNCTION Returns whether the device is a filesystem or not. A filesystem supports seperate files storing information. It may also support sub-directories, but is not required to. If the filesystem doesn't support this new packet, IsFileSystem() will use Lock(":",...) as an indicator. INPUTS name - Name of device in question, with trailing ':'. RESULT result - Flag to indicate if device is a file system SEE ALSO Lock() dos.library/IsInteractive dos.library/IsInteractive NAME IsInteractive -- Discover whether a file is "interactive" SYNOPSIS status = IsInteractive( file ) D0 D1 BOOL IsInteractive(BPTR) FUNCTION The return value 'status' indicates whether the file associated with the file handle 'file' is connected to a virtual terminal. INPUTS file - BCPL pointer to a file handle RESULTS status - boolean SEE ALSO dos.library/LoadSeg dos.library/LoadSeg NAME LoadSeg -- Scatterload a loadable file into memory SYNOPSIS seglist = LoadSeg( name ) D0 D1 BPTR LoadSeg(STRPTR) FUNCTION The file 'name' should be a load module produced by the linker. LoadSeg() scatterloads the CODE, DATA and BSS segments into memory, chaining together the segments with BPTR's on their first words. The end of the chain is indicated by a zero. There can be any number of segments in a file. All necessary relocation is handled by LoadSeg(). In the event of an error any blocks loaded will be unloaded and a NULL result returned. If the module is correctly loaded then the output will be a pointer at the beginning of the list of blocks. Loaded code is unloaded via a call to UnLoadSeg(). INPUTS name - pointer to a null-terminated string RESULTS seglist - BCPL pointer to a seglist SEE ALSO UnLoadSeg(), InternalLoadSeg(), InternalUnLoadSeg(), CreateProc(), CreateNewProc(), NewLoadSeg(). dos.library/Lock dos.library/Lock NAME Lock -- Lock a directory or file SYNOPSIS lock = Lock( name, accessMode ) D0 D1 D2 BPTR Lock(STRPTR, LONG) FUNCTION A filing system lock on the file or directory 'name' is returned if possible. If the accessMode is ACCESS_READ, the lock is a shared read lock; if the accessMode is ACCESS_WRITE then it is an exclusive write lock. Do not use random values for mode. If Lock() fails (that is, if it cannot obtain a filing system lock on the file or directory) it returns a zero. Tricky assumptions about the internal format of a lock are unwise, as are any attempts to use the fl_Link or fl_Access fields. INPUTS name - pointer to a null-terminated string accessMode - integer RESULTS lock - BCPL pointer to a lock SEE ALSO UnLock(), DupLock(), ChangeMode(), NameFromLock(), DupLockFromFH() dos.library/LockDosList dos.library/LockDosList NAME LockDosList -- Locks the specified Dos Lists for use (V36) SYNOPSIS dlist = LockDosList(flags) D0 D1 struct DosList *LockDosList(ULONG) FUNCTION Locks the dos device list in preparation to walk the list. If the list is 'busy' then this routine will not return until it is available. This routine "nests": you can call it multiple times, and then must unlock it the same number of times. The dlist returned is NOT a valid entry: it is a special value. Note that for 1.3 compatibility, it also does a Forbid() - this will probably be removed at some future time. The 1.3 Forbid() locking of this list had some race conditions. The pointer returned by this is NOT an actual DosList pointer - you should use on of the other DosEntry calls to get actual pointers to DosList structures (such as NextDosEntry()), passing the value returned by LockDosList() as the dlist value. Note for handler writers: you should never call this function with LDF_WRITE, since it can deadlock you (if someone has it read-locked and they're trying to send you a packet). Use AttemptLockDosList() instead, and effectively busy-wait with delays for the list to be available. The other option is that you can spawn a process to add the entry safely. As an example, here's how you can search for all volumes of a specific name and do something with them: 2.0 way: dl = LockDosList(LDF_VOLUMES|LDF_READ); while (dl = FindDosEntry(dl,name,LDF_VOLUMES)) { Add to list of volumes to process or break out of the while loop. (You could try using it here, but I advise against it for compatability reasons if you are planning on continuing to examine the list.) } process list of volumes saved above, or current entry if you're only interested in the first one of that name. UnLockDosList(LDF_VOLUMES|LDF_READ); \* must not use dl after this! *\ 1.3/2.0 way: if (version >= 36) dl = LockDosList(LDF_VOLUMES|LDF_READ); else { Forbid(); /* tricky! note dol_Next is at offset 0! */ dl = &(...->di_DeviceList); } while (version >= 36 ? dl = FindDosEntry(dl,name,LDF_VOLUMES) : dl = yourfindentry(dl,name,DLT_VOLUME)) { Add to list of volumes to process, or break out of the while loop. Do NOT lock foo1/foo2 here if you will continue to examine the list - it breaks the forbid and the list may change on you. } process list of volumes saved above, or current entry if you're only interested in the first one of that name. if (version >= 36) UnLockDosList(LDF_VOLUMES|LDF_READ); else Permit(); \* must not use dl after this! *\ ... struct DosList * yourfindentry (struct DosList *dl, STRPTRname, type) { \* tricky - depends on dol_Next being at offset 0, and the initial ptr being a ptr to di_DeviceList! *\ while (dl = dl->dol_Next) { if (dl->dol_Type == type && stricmp(name,BADDR(dl->dol_Name)+1) == 0) { break; } } return dl; } INPUTS flags - Flags stating which types of nodes you want to lock. RESULT dlist - Pointer to the head of the list. NOT a valid node! SEE ALSO AttemptLockDosList(), UnLockDosList(), Forbid(), NextDosEntry() dos.library/LockRecord dos.library/LockRecord NAME LockRecord -- Locks a portion of a file (V36) SYNOPSIS success = LockRecord(fh,offset,length,mode,timeout) D0 D1 D2 D3 D4 D5 BOOL LockRecord(BPTR,ULONG,ULONG,ULONG,ULONG) FUNCTION This locks a portion of a file for exclusive access. Timeout is how long to wait in ticks (1/50 sec) for the record to be available. Valid modes are: REC_EXCLUSIVE REC_EXCLUSIVE_IMMED REC_SHARED REC_SHARED_IMMED For the IMMED modes, the timeout is ignored. Record locks are tied to the filehandle used to create them. The same filehandle can get any number of exclusive locks on the same record, for example. These are cooperative locks, they only affect other people calling LockRecord(). INPUTS fh - File handle for which to lock the record offset - Record start position length - Length of record in bytes mode - Type of lock requester timeout - Timeout interval in ticks. 0 is legal. RESULT success - Success or failure BUGS In 2.0 through 2.02 (V36), LockRecord() only worked in the ramdisk. Attempting to lock records on the disk filesystem causes a crash. This was fixed for V37. SEE ALSO LockRecords(), UnLockRecord(), UnLockRecords() dos.library/LockRecords dos.library/LockRecords NAME LockRecords -- Lock a series of records (V36) SYNOPSIS success = LockRecords(record_array,timeout) D0 D1 D2 BOOL LockRecords(struct RecordLock *,ULONG) FUNCTION This locks several records within a file for exclusive access. Timeout is how long to wait in ticks for the records to be available. The wait is applied to each attempt to lock each record in the list. It is recommended that you always lock a set of records in the same order to reduce possibilities of deadlock. The array of RecordLock structures is terminated by an entry with rec_FH of NULL. INPUTS record_array - List of records to be locked timeout - Timeout interval. 0 is legal RESULT success - Success or failure BUGS See LockRecord() SEE ALSO LockRecord(), UnLockRecord(), UnLockRecords() dos.library/MakeDosEntry dos.library/MakeDosEntry NAME MakeDosEntry -- Creates a DosList structure (V36) SYNOPSIS newdlist = MakeDosEntry(name, type) D0 D1 D2 struct DosList *MakeDosEntry(STRPTR, LONG) FUNCTION Create a DosList structure, including allocating a name and correctly null-terminating the BSTR. It also sets the dol_Type field, and sets all other fields to 0. This routine should be eliminated and replaced by a value passed to AllocDosObject()! INPUTS name - name for the device/volume/assign node. type - type of node. RESULT newdlist - The new device entry or NULL. SEE ALSO AddDosEntry(), RemDosEntry(), FindDosEntry(), LockDosList(), NextDosEntry(), FreeDosEntry() dos.library/MakeLink dos.library/MakeLink NAME MakeLink -- Creates a filesystem link (V36) SYNOPSIS success = MakeLink( name, dest, soft ) D0 D1 D2 D3 BOOL MakeLink( STRPTR, LONG, LONG ) FUNCTION Create a filesystem link from 'name' to dest. For "soft-links", dest is a pointer to a null-terminated path string. For "hard- links", dest is a lock (BPTR). 'soft' is FALSE for hard-links, non-zero otherwise. Soft-links are resolved at access time by a combination of the filesystem (by returning ERROR_IS_SOFT_LINK to dos), and by Dos (using ReadLink() to resolve any links that are hit). Hard-links are resolved by the filesystem in question. A series of hard-links to a file are all equivalent to the file itself. If one of the links (or the original entry for the file) is deleted, the data remains until there are no links left. INPUTS name - Name of the link to create dest - CPTR to path string, or BPTR lock soft - FALSE for hard-links, non-zero for soft-links RESULT Success - boolean BUGS In V36, soft-links didn't work in the ROM filesystem. This was fixed for V37. SEE ALSO ReadLink(), Open(), Lock() dos.library/MatchEnd dos.library/MatchEnd NAME MatchEnd -- Free storage allocated for MatchFirst()/MatchNext() (V36) SYNOPSIS MatchEnd(AnchorPath) D1 VOID MatchEnd(struct AnchorPath *) FUNCTION Return all storage associated with a given search. INPUTS AnchorPath - Anchor used for MatchFirst()/MatchNext() MUST be longword aligned! SEE ALSO MatchFirst(), ParsePattern(), Examine(), CurrentDir(), Examine(), MatchNext(), ExNext(), <dos/dosasl.h> dos.library/MatchFirst dos.library/MatchFirst NAME MatchFirst -- Finds file that matches pattern (V36) SYNOPSIS error = MatchFirst(pat, AnchorPath) D0 D1 D2 LONG MatchFirst(STRPTR, struct AnchorPath *) FUNCTION Locates the first file or directory that matches a given pattern. MatchFirst() is passed your pattern (you do not pass it through ParsePattern() - MatchFirst() does that for you), and the control structure. MatchFirst() normally initializes your AnchorPath structure for you, and returns the first file that matched your pattern, or an error. Note that MatchFirst()/MatchNext() are unusual for Dos in that they return 0 for success, or the error code (see <dos/dos.h>), instead of the application getting the error code from IoErr(). When looking at the result of MatchFirst()/MatchNext(), the ap_Info field of your AnchorPath has the results of an Examine() of the object. You normally get the name of the object from fib_FileName, and the directory it's in from ap_Current->an_Lock. To access this object, normally you would temporarily CurrentDir() to the lock, do an action to the file/dir, and then CurrentDir() back to your original directory. This makes certain you affect the right object even when two volumes of the same name are in the system. You can use ap_Buf (with ap_Strlen) to get a name to report to the user. To initialize the AnchorPath structure (particularily when reusing it), set ap_BreakBits to the signal bits (CDEF) that you want to take a break on, or NULL, if you don't want to convenience the user. ap_Flags should be set to any flags you need or all 0's otherwise. ap_FoundBreak should be cleared if you'll be using breaks. If you want to have the FULL PATH NAME of the files you found, allocate a buffer at the END of this structure, and put the size of it into ap_Strlen. If you don't want the full path name, make sure you set ap_Strlen to zero. In this case, the name of the file, and stats are available in the ap_Info, as per usual. Then call MatchFirst() and then afterwards, MatchNext() with this structure. You should check the return value each time (see below) and take the appropriate action, ultimately calling MatchEnd() when there are no more files or you are done. You can tell when you are done by checking for the normal AmigaDOS return code ERROR_NO_MORE_ENTRIES. Note: patterns with trailing slashes may cause MatchFirst()/MatchNext() to return with an ap_Current->an_Lock on the object, and a filename of the empty string (""). See ParsePattern() for more information on the patterns. INPUTS pat - Pattern to search for AnchorPath - Place holder for search. MUST be longword aligned! RESULT error - 0 for success or error code. (Opposite of most Dos calls!) BUGS In V36, there were a number of bugs with MatchFirst()/MatchNext(). One was that if you entered a directory with a name like "df0:l" using DODIR, it would re-lock the full string "df0:l", which can cause problems if the disk has changed. It also had problems with patterns such as #?/abc/def - the ap_Current->an_Lock would not be on the directory def is found in. ap_Buf would be correct, however. It had similar problems with patterns with trailing slashes. These have been fixed for V37 and later. A bug that has not been fixed for V37 concerns a pattern of a single directory name (such as "l"). If you enter such a directory via DODIR, it re-locks l relative to the current directory. Thus you must not change the current directory before calling MatchNext() with DODIR in that situation. If you aren't using DODIR to enter directories you can ignore this. This may be fixed in some upcoming release. SEE ALSO MatchNext(), ParsePattern(), Examine(), CurrentDir(), Examine(), MatchEnd(), ExNext(), <dos/dosasl.h> dos.library/MatchNext dos.library/MatchNext NAME MatchNext - Finds the next file or directory that matches pattern (V36) SYNOPSIS error = MatchNext(AnchorPath) D0 D1 LONG MatchNext(struct AnchorPath *) FUNCTION Locates the next file or directory that matches a given pattern. See <dos/dosasl.h> for more information. Various bits in the flags allow the application to control the operation of MatchNext(). See MatchFirst() for other notes. INPUTS AnchorPath - Place holder for search. MUST be longword aligned! RESULT error - 0 for success or error code. (Opposite of most Dos calls) BUGS See MatchFirst(). SEE ALSO MatchFirst(), ParsePattern(), Examine(), CurrentDir(), Examine(), MatchEnd(), ExNext(), <dos/dosasl.h> dos.library/MatchPattern dos.library/MatchPattern NAME MatchPattern -- Checks for a pattern match with a string (V36) SYNOPSIS match = MatchPattern(pat, str) D0 D1 D2 BOOL MatchPattern(STRPTR, STRPTR) FUNCTION Checks for a pattern match with a string. The pattern must be a tokenized string output by ParsePattern(). This routine is case-sensitive. NOTE: this routine is highly recursive. You must have at least 1500 free bytes of stack to call this (it will cut off it's recursion before going any deeper than that and return failure). That's _currently_ enough for about 100 levels deep of #, (, ~, etc. INPUTS pat - Special pattern string to match as returned by ParsePattern() str - String to match against given pattern RESULT match - success or failure of pattern match. On failure, IoErr() will return 0 or ERROR_TOO_MANY_LEVELS (starting with V37 - before that there was no stack checking). SEE ALSO ParsePattern(), MatchPatternNoCase(), MatchFirst(), MatchNext() dos.library/MatchPatternNoCase dos.library/MatchPatternNoCase NAME MatchPatternNoCase -- Checks for a pattern match with a string (V37) SYNOPSIS match = MatchPatternNoCase(pat, str) D0 D1 D2 BOOL MatchPatternNoCase(STRPTR, STRPTR) FUNCTION Checks for a pattern match with a string. The pattern must be a tokenized string output by ParsePatternNoCase(). This routine is case-insensitive. NOTE: this routine is highly recursive. You must have at least 1500 free bytes of stack to call this (it will cut off it's recursion before going any deeper than that and return failure). That's _currently_ enough for about 100 levels deep of #, (, ~, etc. INPUTS pat - Special pattern string to match as returned by ParsePatternNoCase() str - String to match against given pattern RESULT match - success or failure of pattern match. On failure, IoErr() will return 0 or ERROR_TOO_MANY_LEVELS (starting with V37 - before that there was no stack checking). BUGS See ParsePatternNoCase(). SEE ALSO ParsePatternNoCase(), MatchPattern(), MatchFirst(), MatchNext() dos.library/MaxCli dos.library/MaxCli NAME MaxCli -- returns the highest CLI process number possibly in use (V36) SYNOPSIS number = MaxCli() D0 LONG MaxCli(void) FUNCTION Returns the highest CLI number that may be in use. CLI numbers are reused, and are usually as small as possible. To find all CLIs, scan using FindCliProc() from 1 to MaxCLI(). The number returned by MaxCli() may change as processes are created and destroyed. RESULT number - The highest CLI number that _may_ be in use. SEE ALSO FindCliProc(), Cli() dos.library/NameFromFH dos.library/NameFromFH NAME NameFromFH -- Get the name of an open filehandle (V36) SYNOPSIS success = NameFromFH(fh, buffer, len) D0 D1 D2 D3 BOOL NameFromFH(BPTR, STRPTR, LONG) FUNCTION Returns a fully qualified path for the filehandle. This routine is guaranteed not to write more than len characters into the buffer. The name will be null-terminated. See NameFromLock() for more information. INPUTS fh - Lock of object to be examined. buffer - Buffer to store name. len - Length of buffer. RESULT success - Success/failure indicator. SEE ALSO NameFromLock() dos.library/NameFromLock dos.library/NameFromLock NAME NameFromLock -- Returns the name of a locked object (V36) SYNOPSIS success = NameFromLock(lock, buffer, len) D0 D1 D2 D3 BOOL NameFromLock(BPTR, STRPTR, LONG) FUNCTION Returns a fully qualified path for the lock. This routine is guaranteed not to write more than len characters into the buffer. The name will be null-terminated. NOTE: if the volume is not mounted, the system will request it (unless of course you set pr_WindowPtr to -1). If the volume is not mounted or inserted, it will return an error. If the lock passed in is NULL, "SYS:" will be returned. If the buffer is too short, an error will be returned, and IoErr() will return ERROR_LINE_TOO_LONG. INPUTS lock - Lock of object to be examined. buffer - Buffer to store name. len - Length of buffer. RESULT success - Success/failure indicator. BUGS Should return the name of the boot volume instead of SYS: for a NULL lock. SEE ALSO NameFromFH(), Lock() dos.library/NewLoadSeg dos.library/NewLoadSeg NAME NewLoadSeg -- Improved version of LoadSeg for stacksizes (V36) SYNOPSIS seglist = NewLoadSeg(file, tags) D0 D1 D2 BPTR NewLoadSeg(STRPTR, struct TagItem *) seglist = NewLoadSegTagList(file, tags) D0 D1 D2 BPTR NewLoadSegTagList(STRPTR, struct TagItem *) seglist = NewLoadSegTags(file, ...) BPTR NewLoadSegTags(STRPTR, ...) FUNCTION Does a LoadSeg on a file, and takes additional actions based on the tags supplied. Clears unused portions of Code and Data hunks (as well as BSS hunks). (This also applies to InternalLoadSeg() and LoadSeg()). NOTE to overlay users: NewLoadSeg() does NOT return seglist in both D0 and D1, as LoadSeg does. The current ovs.asm uses LoadSeg(), and assumes returns are in D1. We will support this for LoadSeg() ONLY. INPUTS file - Filename of file to load tags - pointer to tagitem array RESULT seglist - Seglist loaded, or NULL BUGS No tags are currently defined. SEE ALSO LoadSeg(), UnLoadSeg(), InternalLoadSeg(), InternalUnLoadSeg() dos.library/NextDosEntry dos.library/NextDosEntry NAME NextDosEntry -- Get the next Dos List entry (V36) SYNOPSIS newdlist = NextDosEntry(dlist,flags) D0 D1 D2 struct DosList *NextDosEntry(struct DosList *,ULONG) FUNCTION Find the next Dos List entry of the right type. You MUST have locked the types you're looking for. Returns NULL if there are no more of that type in the list. INPUTS dlist - The current device entry. flags - What type of entries to look for. RESULT newdlist - The next device entry of the right type or NULL. SEE ALSO AddDosEntry(), RemDosEntry(), FindDosEntry(), LockDosList(), MakeDosEntry(), FreeDosEntry() dos.library/Open dos.library/Open NAME Open -- Open a file for input or output SYNOPSIS file = Open( name, accessMode ) D0 D1 D2 BPTR Open(STRPTR, LONG) FUNCTION The named file is opened and a file handle returned. If the accessMode is MODE_OLDFILE, an existing file is opened for reading or writing. If the value is MODE_NEWFILE, a new file is created for writing. MODE_READWRITE opens a file with an shared lock, but creates it if it didn't exist. Open types are documented in the <dos/dos.h> or <libraries/dos.h> include file. The 'name' can be a filename (optionally prefaced by a device name), a simple device such as NIL:, a window specification such as CON: or RAW: followed by window parameters, or "*", representing the current window. Note that as of V36, "*" is obsolete, and CONSOLE: should be used instead. If the file cannot be opened for any reason, the value returned will be zero, and a secondary error code will be available by calling the routine IoErr(). INPUTS name - pointer to a null-terminated string accessMode - integer RESULTS file - BCPL pointer to a file handle SEE ALSO Close(), ChangeMode(), NameFromFH(), ParentOfFH(), ExamineFH() dos.library/OpenFromLock dos.library/OpenFromLock NAME OpenFromLock -- Opens a file you have a lock on (V36) SYNOPSIS fh = OpenFromLock(lock) D0 D1 BPTR OpenFromLock(BPTR) FUNCTION Given a lock, this routine performs an open on that lock. If the open succeeds, the lock is (effectively) relinquished, and should not be UnLock()ed or used. If the open fails, the lock is still usable. The lock associated with the file internally is of the same access mode as the lock you gave up - shared is similar to MODE_OLDFILE, exclusive is similar to MODE_NEWFILE. INPUTS lock - Lock on object to be opened. RESULT fh - Newly opened file handle or NULL for failure BUGS In the original V36 autodocs, this was shown (incorrectly) as taking a Mode parameter as well. The prototypes and pragmas were also wrong. SEE ALSO Open(), Close(), Lock(), UnLock() dos.library/Output dos.library/Output NAME Output -- Identify the programs' initial output file handle SYNOPSIS file = Output() D0 BPTR Output(void) FUNCTION Output() is used to identify the initial output stream allocated when the program was initiated. Never close the filehandle returned by Output(). RESULTS file - BCPL pointer to a file handle SEE ALSO Input() dos.library/ParentDir dos.library/ParentDir NAME ParentDir -- Obtain the parent of a directory or file SYNOPSIS newlock = ParentDir( lock ) D0 D1 BPTR ParentDir(BPTR) FUNCTION The argument 'lock' is associated with a given file or directory. ParentDir() returns 'newlock' which is associated the parent directory of 'lock'. Taking the ParentDir() of the root of the current filing system returns a NULL (0) lock. Note this 0 lock represents the root of file system that you booted from (which is, in effect, the parent of all other file system roots.) INPUTS lock - BCPL pointer to a lock RESULTS newlock - BCPL pointer to a lock SEE ALSO Lock(), DupLock(), UnLock(), ParentOfFH(), DupLockFromFH() dos.library/ParentOfFH dos.library/ParentOfFH NAME ParentOfFH -- returns a lock on the parent directory of a file (V36) SYNOPSIS lock = ParentOfFH(fh) D0 D1 BPTR ParentOfFH(BPTR) FUNCTION Returns a shared lock on the parent directory of the filehandle. INPUTS fh - Filehandle you want the parent of. RESULT lock - Lock on parent directory of the filehandle or NULL for failure. SEE ALSO Parent(), Lock(), UnLock() DupLockFromFH() dos.library/ParsePattern dos.library/ParsePattern NAME ParsePattern -- Create a tokenized string for MatchPattern() (V36) SYNOPSIS IsWild = ParsePattern(Source, Dest, DestLength) d0 D1 D2 D3 LONG ParsePattern(STRPTR, STRPTR, LONG) FUNCTION Tokenizes a pattern, for use by MatchPattern(). Also indicates if there are any wildcards in the pattern (i.e. whether it might match more than one item). Note that Dest must be at least 2 times as large as Source plus bytes to be (almost) 100% certain of no buffer overflow. This is because each input character can currently expand to 2 tokens (with one exception that can expand to 3, but only once per string). Note: this implementation may change in the future, so you should handle error returns in all cases, but the size above should still be a reasonable upper bound for a buffer allocation. The patterns are fairly extensive, and approximate some of the ability of Unix/grep "regular expression" patterns. Here are the available tokens: ? Matches a single character. # Matches the following expression 0 or more times. (ab|cd) Matches any one of the items seperated by '|'. ~ Negates the following expression. It matches all strings that do not match the expression (aka ~(foo) matches all strings that are not exactly "foo"). [abc] Character class: matches any of the characters in the class. [~bc] Character class: matches any of the characters not in the class. a-z Character range (only within character classes). % Matches 0 characters always (useful in "(foo|bar|%)"). * Synonym for "#?", not available by default in 2.0. Available as an option that can be turned on. "Expression" in the above table means either a single character (ex: "#?"), or an alternation (ex: "#(ab|cd|ef)"), or a character class (ex: "#[a-zA-Z]"). INPUTS source - unparsed wildcard string to search for. dest - output string, gets tokenized version of input. DestLength - length available in destination (should be at least as twice as large as source + 2 bytes). RESULT IsWild - 1 means there were wildcards in the pattern, 0 means there were no wildcards in the pattern, -1 means there was a buffer overflow or other error BUGS Should set IoErr() to something useful (not currently set) on an error. SEE ALSO ParsePatternNoCase(), MatchPattern(), MatchFirst(), MatchNext() dos.library/ParsePatternNoCase dos.library/ParsePatternNoCase NAME ParsePatternNoCase -- Create a tokenized string for MatchPatternNoCase() (V37) SYNOPSIS IsWild = ParsePatternNoCase(Source, Dest, DestLength) d0 D1 D2 D3 LONG ParsePatternNoCase(STRPTR, STRPTR, LONG) FUNCTION Tokenizes a pattern, for use by MatchPatternNoCase(). Also indicates if there are any wildcards in the pattern (i.e. whether it might match more than one item). Note that Dest must be at least 2 times as large as Source plus 2 bytes. For a description of the wildcards, see ParsePattern(). INPUTS source - unparsed wildcard string to search for. dest - output string, gets tokenized version of input. DestLength - length available in destination (should be at least as twice as large as source + 2 bytes). RESULT IsWild - 1 means there were wildcards in the pattern, 0 means there were no wildcards in the pattern, -1 means there was a buffer overflow or other error BUGS Should set IoErr() to something useful (not currently set) on an error. In V37, it didn't properly convert character-classes ([x-y]) to upper case. Workaround: convert the input pattern to upper case using ToUpper() from utility.library before calling ParsePatternNoCase(). Fixed in V39 dos. SEE ALSO ParsePattern(), MatchPatternNoCase(), MatchFirst(), MatchNext(), utility.library/ToUpper() dos.library/PathPart dos.library/PathPart NAME PathPart -- Returns a pointer to the end of the next-to-last (V36) component of a path. SYNOPSIS fileptr = PathPart( path ) D0 D1 STRPTR PathPart( STRPTR ) FUNCTION This function returns a pointer to the character after the next-to-last component of a path specification, which will normally be the directory name. If there is only one component, it returns a pointer to the beginning of the string. The only real difference between this and FilePart() is the handling of '/'. INPUTS path - pointer to an path string. May be relative to the current directory or the current disk. RESULT fileptr - pointer to the end of the next-to-last component of the path. EXAMPLE PathPart("xxx:yyy/zzz/qqq") would return a pointer to the last '/'. PathPart("xxx:yyy") would return a pointer to the first 'y'). SEE ALSO FilePart(), AddPart() dos.library/PrintFault dos.library/PrintFault NAME PrintFault -- Returns the text associated with a DOS error code (V36) SYNOPSIS success = PrintFault(code, header) D0 D1 D2 BOOL PrintFault(LONG, STRPTR) FUNCTION This routine obtains the error message text for the given error code. This is similar to the Fault() function, except that the output is written to the default output channel with buffered output. The value returned by IoErr() is set to the code passed in. INPUTS code - Error code header - header to output before error text RESULT success - Success/failure code. SEE ALSO IoErr(), Fault(), SetIoErr(), Output(), FPuts() dos.library/PutStr dos.library/PutStr NAME PutStr -- Writes a string the the default output (buffered) (V36) SYNOPSIS error = PutStr(str) D0 D1 LONG PutStr(STRPTR) FUNCTION This routine writes an unformatted string to the default output. No newline is appended to the string and any error is returned. This routine is buffered. INPUTS str - Null-terminated string to be written to default output RESULT error - 0 for success, -1 for any error. NOTE: this is opposite most Dos function returns! SEE ALSO FPuts(), FPutC(), FWrite(), WriteChars() dos.library/Read dos.library/Read NAME Read -- Read bytes of data from a file SYNOPSIS actualLength = Read( file, buffer, length ) D0 D1 D2 D3 LONG Read(BPTR, void *, LONG) FUNCTION Data can be copied using a combination of Read() and Write(). Read() reads bytes of information from an opened file (represented here by the argument 'file') into the buffer given. The argument 'length' is the length of the buffer given. The value returned is the length of the information actually read. So, when 'actualLength' is greater than zero, the value of 'actualLength' is the the number of characters read. Usually Read will try to fill up your buffer before returning. A value of zero means that end-of-file has been reached. Errors are indicated by a value of -1. Note: this is an unbuffered routine (the request is passed directly to the filesystem.) Buffered I/O is more efficient for small reads and writes; see FGetC(). INPUTS file - BCPL pointer to a file handle buffer - pointer to buffer length - integer RESULTS actualLength - integer SEE ALSO Open(), Close(), Write(), Seek(), FGetC() dos.library/ReadArgs dos.library/ReadArgs NAME ReadArgs - Parse the command line input (V36) SYNOPSIS result = ReadArgs(template, array, rdargs) D0 D1 D2 D3 struct RDArgs * ReadArgs(STRPTR, LONG *, struct RDArgs *) FUNCTION Parses and argument string according to a template. Normally gets the arguments by reading buffered IO from Input(), but also can be made to parse a string. MUST be matched by a call to FreeArgs(). ReadArgs() parses the commandline according to a template that is passed to it. This specifies the different command-line options and their types. A template consists of a list of options. Options are named in "full" names where possible (for example, "Quick" instead of "Q"). Abbreviations can also be specified by using "abbrev=option" (for example, "Q=Quick"). Options in the template are separated by commas. To get the results of ReadArgs(), you examine the array of longwords you passed to it (one entry per option in the template). This array should be cleared (or initialized to your default values) before passing to ReadArgs(). Exactly what is put in a given entry by ReadArgs() depends on the type of option. The default is a string (a sequence of non-whitespace characters, or delimited by quotes, which will be stripped by ReadArgs()), in which case the entry will be a pointer. Options can be followed by modifiers, which specify things such as the type of the option. Modifiers are specified by following the option with a '/' and a single character modifier. Multiple modifiers can be specified by using multiple '/'s. Valid modifiers are: /S - Switch. This is considered a boolean variable, and will be set if the option name appears in the command-line. The entry is the boolean (0 for not set, non-zero for set). /K - Keyword. This means that the option will not be filled unless the keyword appears. For example if the template is "Name/K", then unless "Name=<string>" or "Name <string>" appears in the command line, Name will not be filled. /N - Number. This parameter is considered a decimal number, and will be converted by ReadArgs. If an invalid number is specified, an error will be returned. The entry will be a pointer to the longword number (this is how you know if a number was specified). /T - Toggle. This is similar to a switch, but when specified causes the boolean value to "toggle". Similar to /S. /A - Required. This keyword must be given a value during command-line processing, or an error is returned. /F - Rest of line. If this is specified, the entire rest of the line is taken as the parameter for the option, even if other option keywords appear in it. /M - Multiple strings. This means the argument will take any number of strings, returning them as an array of strings. Any arguments not considered to be part of another option will be added to this option. Only one /M should be specified in a template. Example: for a template "Dir/M,All/S" the command-line "foo bar all qwe" will set the boolean "all", and return an array consisting of "foo", "bar", and "qwe". The entry in the array will be a pointer to an array of string pointers, the last of which will be NULL. There is an interaction between /M parameters and /A parameters. If there are unfilled /A parameters after parsing, it will grab strings from the end of a previous /M parameter list to fill the /A's. This is used for things like Copy ("From/A/M,To/A"). ReadArgs() returns a struct RDArgs if it succeeds. This serves as an "anchor" to allow FreeArgs() to free the associated memory. You can also pass in a struct RDArgs to control the operation of ReadArgs() (normally you pass NULL for the parameter, and ReadArgs() allocates one for you). This allows providing different sources for the arguments, providing your own string buffer space for temporary storage, and extended help text. See <dos/rdargs.h> for more information on this. Note: if you pass in a struct RDArgs, you must still call FreeArgs() to release storage that gets attached to it, but you are responsible for freeing the RDArgs yourself. If you pass in a RDArgs structure, you MUST reset (clear or set) RDA_Buffer for each new call to RDArgs. The exact behavior if you don't do this varies from release to release and case to case; don't count on the behavior! See BUGS regarding passing in strings. INPUTS template - formatting string array - array of longwords for results, 1 per template entry rdargs - optional rdargs structure for options. AllocDosObject should be used for allocating them if you pass one in. RESULT result - a struct RDArgs or NULL for failure. BUGS In V36, there were a couple of minor bugs with certain argument combinations (/M/N returned strings, /T didn't work, and /K and /F interacted). Also, a template with a /K before any non-switch parameter will require the argument name to be given in order for line to be accepted (i.e. "parm/K,xyzzy/A" would require "xyzzy=xxxxx" in order to work - "xxxxx" would not work). If you need to avoid this for V36, put /K parameters after all non-switch parameters. These problems should be fixed for V37. Currently (V37 and before) it requires any strings passed in to have newlines at the end of the string. This may or may not be fixed in the future. SEE ALSO FindArg(), ReadItem(), FreeArgs(), AllocDosObject() dos.library/ReadItem dos.library/ReadItem NAME ReadItem - reads a single argument/name from command line (V36) SYNOPSIS value = ReadItem(buffer, maxchars, input) D0 D1 D2 D3 LONG ReadItem(STRPTR, LONG, struct CSource *) FUNCTION Reads a "word" from either Input() (buffered), or via CSource, if it is non-NULL (see <dos/rdargs.h> for more information). Handles quoting and some '*' substitutions (*e and *n) inside quotes (only). See dos/dos.h for a listing of values returned by ReadItem() (ITEM_XXXX). A "word" is delimited by whitespace, quotes, '=', or an EOF. ReadItem always unreads the last thing read (UnGetC(fh,-1)) so the caller can find out what the terminator was. INPUTS buffer - buffer to store word in. maxchars - size of the buffer input - CSource input or NULL (uses FGetC(Input())) RESULT value - See <dos/dos.h> for return values. BUGS Doesn't actually unread the terminator. SEE ALSO ReadArgs(), FindArg(), UnGetC(), FGetC(), Input(), <dos/dos.h>, <dos/rdargs.h>, FreeArgs() dos.library/ReadLink dos.library/ReadLink NAME ReadLink -- Reads the path for a soft filesystem link (V36) SYNOPSIS success = ReadLink( port, lock, path, buffer, size) D0 D1 D2 D3 D4 D5 BOOL ReadLink( struct MsgPort *, BPTR, STRPTR, STRPTR, ULONG) FUNCTION ReadLink() takes a lock/name pair (usually from a failed attempt to use them to access an object with packets), and asks the filesystem to find the softlink and fill buffer with the modified path string. You then start the resolution process again by calling GetDeviceProc() with the new string from ReadLink(). Soft-links are resolved at access time by a combination of the filesystem (by returning ERROR_IS_SOFT_LINK to dos), and by Dos (using ReadLink() to resolve any links that are hit). INPUTS port - msgport of the filesystem lock - lock this path is relative to on the filesystem path - path that caused the ERROR_IS_SOFT_LINK buffer - pointer to buffer for new path from handler. size - size of buffer. RESULT Success - boolean BUGS In V36, soft-links didn't work in the ROM filesystem. This was fixed for V37. SEE ALSO MakeLink(), Open(), Lock(), GetDeviceProc() dos.library/Relabel dos.library/Relabel NAME Relabel -- Change the volume name of a volume (V36) SYNOPSIS success = Relabel(volumename,name) D0 D1 D2 BOOL Relabel(STRPTR,STRPTR) FUNCTION Changes the volumename of a volume, if supported by the filesystem. INPUTS volumename - Full name of device to rename (with ':') newname - New name to apply to device (without ':') RESULT success - Success/failure indicator SEE ALSO dos.library/RemAssignList dos.library/RemAssignList NAME RemAssignList -- Remove an entry from a multi-dir assign (V36) SYNOPSIS success = RemAssignList(name,lock) D0 D1 D2 BOOL RemAssignList(STRPTR,BPTR) FUNCTION Removes an entry from a multi-directory assign. The entry removed is the first one for which SameLock with 'lock' returns that they are on the same object. The lock for the entry in the list is unlocked (not the entry passed in). INPUTS name - Name of device to remove lock from (without trailing ':') lock - Lock associated with the object to remove from the list RESULT success - Success/failure indicator. BUGS In V36 through V39.23 dos, it would fail to remove the first lock in the assign. Fixed in V39.24 dos (after the V39.106 kickstart). SEE ALSO Lock(), AssignLock(), AssignPath(), AssignLate(), DupLock(), AssignAdd(), UnLock() dos.library/RemDosEntry dos.library/RemDosEntry NAME RemDosEntry -- Removes a Dos List entry from it's list (V36) SYNOPSIS success = RemDosEntry(dlist) D0 D1 BOOL RemDosEntry(struct DosList *) FUNCTION This removes an entry from the Dos Device list. The memory associated with the entry is NOT freed. NOTE: you must have locked the Dos List with the appropriate flags before calling this routine. Handler writers should see the AddDosEntry() caveats about locking and use a similar workaround to avoid deadlocks. INPUTS dlist - Device list entry to be removed. RESULT success - Success/failure indicator SEE ALSO AddDosEntry(), FindDosEntry(), NextDosEntry(), LockDosList(), MakeDosEntry(), FreeDosEntry() dos.library/RemSegment dos.library/RemSegment NAME RemSegment - Removes a resident segment from the resident list (V36) SYNOPSIS success = RemSegment(segment) D0 D1 BOOL RemSegment(struct Segment *) FUNCTION Removes a resident segment from the Dos resident segment list, unloads it, and does any other cleanup required. Will only succeed if the seg_UC (usecount) is 0. INPUTS segment - the segment to be removed RESULT success - success or failure. SEE ALSO FindSegment(), AddSegment() dos.library/Rename dos.library/Rename NAME Rename -- Rename a directory or file SYNOPSIS success = Rename( oldName, newName ) D0 D1 D2 BOOL Rename(STRPTR, STRPTR) FUNCTION Rename() attempts to rename the file or directory specified as 'oldName' with the name 'newName'. If the file or directory 'newName' exists, Rename() fails and returns an error. Both 'oldName' and the 'newName' can contain a directory specification. In this case, the file will be moved from one directory to another. Note: it is impossible to Rename() a file from one volume to another. INPUTS oldName - pointer to a null-terminated string newName - pointer to a null-terminated string RESULTS success - boolean SEE ALSO Relabel() dos.library/ReplyPkt dos.library/ReplyPkt NAME ReplyPkt -- replies a packet to the person who sent it to you (V36) SYNOPSIS ReplyPkt(packet, result1, result2) D1 D2 D3 void ReplyPkt(struct DosPacket *, LONG, LONG) FUNCTION This returns a packet to the process which sent it to you. In addition, puts your pr_MsgPort address in dp_Port, so using ReplyPkt() again will send the message to you. (This is used in "ping-ponging" packets between two processes). It uses result 1 & 2 to set the dp_Res1 and dp_Res2 fields of the packet. INPUTS packet - packet to reply, assumed to set up correctly. result1 - first result result2 - secondary result SEE ALSO DoPkt(), SendPkt(), WaitPkt(), IoErr() dos.library/RunCommand dos.library/RunCommand NAME RunCommand -- Runs a program using the current process (V36) SYNOPSIS rc = RunCommand(seglist, stacksize, argptr, argsize) D0 D1 D2 D3 D4 LONG RunCommand(BPTR, ULONG, STRPTR, ULONG) FUNCTION Runs a command on your process/cli. Seglist may be any language, including BCPL programs. Stacksize is in bytes. argptr is a null- terminated string, argsize is its length. Returns the returncode the program exited with in d0. Returns -1 if the stack couldn't be allocated. NOTE: the argument string MUST be terminated with a newline to work properly with ReadArgs() and other argument parsers. RunCommand also takes care of setting up the current input filehandle in such a way that ReadArgs() can be used in the program, and restores the state of the buffering before returning. It also sets the value returned by GetArgStr(), and restores it before returning. NOTE: the setting of the argument string in the filehandle was added in V37. It's usually appropriate to set the command name (via SetProgramName()) before calling RunCommand(). RunCommand() sets the value returned by GetArgStr() while the command is running. INPUTS seglist - Seglist of command to run. stacksize - Number of bytes to allocate for stack space argptr - Pointer to argument command string. argsize - Number of bytes in argument command. RESULT rc - Return code from executed command. -1 indicates failure SEE ALSO CreateNewProc(), SystemTagList(), Execute(), GetArgStr(), SetProgramName(), ReadArgs() dos.library/SameDevice dos.library/SameDevice NAME SameDevice -- Are two locks are on partitions of the device? (V37) SYNOPSIS same = SameDevice(lock1, lock2) D0 D1 D2 BOOL SameDevice( BPTR, BPTR ) FUNCTION SameDevice() returns whether two locks refer to partitions that are on the same physical device (if it can figure it out). This may be useful in writing copy routines to take advantage of asynchronous multi-device copies. Entry existed in V36 and always returned 0. INPUTS lock1,lock2 - locks RESULT same - whether they're on the same device as far as Dos can determine. dos.library/SameLock dos.library/SameLock NAME SameLock -- returns whether two locks are on the same object (V36) SYNOPSIS value = SameLock(lock1, lock2) D0 D1 D2 LONG SameLock(BPTR, BPTR) FUNCTION Compares two locks. Returns LOCK_SAME if they are on the same object, LOCK_SAME_VOLUME if on different objects on the same volume, and LOCK_DIFFERENT if they are on different volumes. Always compare for equality or non-equality with the results, in case new return values are added. INPUTS lock1 - 1st lock for comparison lock2 - 2nd lock for comparison RESULT value - LOCK_SAME, LOCK_SAME_VOLUME, or LOCK_DIFFERENT BUGS Should do more extensive checks for NULL against a real lock, checking to see if the real lock is a lock on the root of the boot volume. In V36, it would return LOCK_SAME_VOLUME for different volumes on the same handler. Also, LOCK_SAME_VOLUME was LOCK_SAME_HANDLER (now an obsolete define, see <dos/dos.h>). SEE ALSO <dos/dos.h> dos.library/Seek dos.library/Seek NAME Seek -- Set the current position for reading and writing SYNOPSIS oldPosition = Seek( file, position, mode ) D0 D1 D2 D3 LONG Seek(BPTR, LONG, LONG) FUNCTION Seek() sets the read/write cursor for the file 'file' to the position 'position'. This position is used by both Read() and Write() as a place to start reading or writing. The result is the current absolute position in the file, or -1 if an error occurs, in which case IoErr() can be used to find more information. 'mode' can be OFFSET_BEGINNING, OFFSET_CURRENT or OFFSET_END. It is used to specify the relative start position. For example, 20 from current is a position 20 bytes forward from current, -20 is 20 bytes back from current. So that to find out where you are, seek zero from current. The end of the file is a Seek() positioned by zero from end. You cannot Seek() beyond the end of a file. INPUTS file - BCPL pointer to a file handle position - integer mode - integer RESULTS oldPosition - integer BUGS The V36 and V37 ROM filesystem (and V36/V37 l:fastfilesystem) returns the current position instead of -1 on an error. It sets IoErr() to 0 on success, and an error code on an error. This bug was fixed in the V39 filesystem. SEE ALSO Read(), Write(), SetFileSize() dos.library/SelectInput dos.library/SelectInput NAME SelectInput -- Select a filehandle as the default input channel (V36) SYNOPSIS old_fh = SelectInput(fh) D0 D1 BPTR SelectInput(BPTR) FUNCTION Set the current input as the default input for the process. This changes the value returned by Input(). old_fh should be closed or saved as needed. INPUTS fh - Newly default input handle RESULT old_fh - Previous default input filehandle SEE ALSO Input(), SelectOutput(), Output() dos.library/SelectOutput dos.library/SelectOutput NAME SelectOutput -- Select a filehandle as the default output channel (V36) SYNOPSIS old_fh = SelectOutput(fh) D0 D1 BPTR SelectOutput(BPTR) FUNCTION Set the current output as the default output for the process. This changes the value returned by Output(). old_fh should be closed or saved as needed. INPUTS fh - Newly desired output handle RESULT old_fh - Previous current output SEE ALSO Output(), SelectInput(), Input() dos.library/SendPkt dos.library/SendPkt NAME SendPkt -- Sends a packet to a handler (V36) SYNOPSIS SendPkt(packet, port, replyport) D1 D2 D3 void SendPkt(struct DosPacket *,struct MsgPort *,struct MsgPort *) FUNCTION Sends a packet to a handler and does not wait. All fields in the packet must be initialized before calling this routine. The packet will be returned to replyport. If you wish to use this with WaitPkt(), use the address of your pr_MsgPort for replyport. INPUTS packet - packet to send, must be initialized and have a message. port - pr_MsgPort of handler process to send to. replyport - MsgPort for the packet to come back to. NOTES Callable from a task. SEE ALSO DoPkt(), WaitPkt(), AllocDosObject(), FreeDosObject(), AbortPkt() dos.library/SetArgStr dos.library/SetArgStr NAME SetArgStr -- Sets the arguments for the current process (V36) SYNOPSIS oldptr = SetArgStr(ptr) D0 D1 STRPTR SetArgStr(STRPTR) FUNCTION Sets the arguments for the current program. The ptr MUST be reset to it's original value before process exit. INPUTS ptr - pointer to new argument string. RESULT oldptr - the previous argument string SEE ALSO GetArgStr(), RunCommand() dos.library/SetComment dos.library/SetComment NAME SetComment -- Change a files' comment string SYNOPSIS success = SetComment( name, comment ) D0 D1 D2 BOOL SetComment(STRPTR, STRPTR) FUNCTION SetComment() sets a comment on a file or directory. The comment is a pointer to a null-terminated string of up to 80 characters in the current ROM filesystem (and RAM:). Note that not all filesystems will support comments (for example, NFS usually will not), or the size of comment supported may vary. INPUTS name - pointer to a null-terminated string comment - pointer to a null-terminated string RESULTS success - boolean SEE ALSO Examine(), ExNext(), SetProtection() dos.library/SetConsoleTask dos.library/SetConsoleTask NAME SetConsoleTask -- Sets the default console for the process (V36) SYNOPSIS oldport = SetConsoleTask(port) D0 D1 struct MsgPort *SetConsoleTask(struct MsgPort *) FUNCTION Sets the default console task's port (pr_ConsoleTask) for the current process. INPUTS port - The pr_MsgPort of the default console handler for the process RESULT oldport - The previous ConsoleTask value. SEE ALSO GetConsoleTask(), Open() dos.library/SetCurrentDirName dos.library/SetCurrentDirName NAME SetCurrentDirName -- Sets the directory name for the process (V36) SYNOPSIS success = SetCurrentDirName(name) D0 D1 BOOL SetCurrentDirName(STRPTR) FUNCTION Sets the name for the current dir in the cli structure. If the name is too long to fit, a failure is returned, and the old value is left intact. It is advised that you inform the user of this condition. This routine is safe to call even if there is no CLI structure. INPUTS name - Name of directory to be set. RESULT success - Success/failure indicator BUGS This clips to a fixed (1.3 compatible) size. SEE ALSO GetCurrentDirName() dos.library/SetFileDate dos.library/SetFileDate NAME SetFileDate -- Sets the modification date for a file or dir (V36) SYNOPSIS success = SetFileDate(name, date) D0 D1 D2 BOOL SetFileDate(STRPTR, struct DateStamp *) FUNCTION Sets the file date for a file or directory. Note that for the Old File System and the Fast File System, the date of the root directory cannot be set. Other filesystems may not support setting the date for all files/directories. INPUTS name - Name of object date - New modification date RESULT success - Success/failure indication SEE ALSO DateStamp(), Examine(), ExNext(), ExAll() dos.library/SetFileSize dos.library/SetFileSize NAME SetFileSize -- Sets the size of a file (V36) SYNOPSIS newsize = SetFileSize(fh, offset, mode) D0 D1 D2 D3 LONG SetFileSize(BPTR, LONG, LONG) FUNCTION Changes the file size, truncating or extending as needed. Not all handlers may support this; be careful and check the return code. If the file is extended, no values should be assumed for the new bytes. If the new position would be before the filehandle's current position in the file, the filehandle will end with a position at the end-of-file. If there are other filehandles open onto the file, the new size will not leave any filehandle pointing past the end-of-file. You can check for this by looking at the new size. Do NOT count on any specific values to be in the extended area. INPUTS fh - File to be truncated/extended. offset - Offset from position determined by mode. mode - One of OFFSET_BEGINNING, OFFSET_CURRENT, or OFFSET_END. RESULT newsize - position of new end-of-file or -1 for error. SEE ALSO Seek() dos.library/SetFileSysTask dos.library/SetFileSysTask NAME SetFileSysTask -- Sets the default filesystem for the process (V36) SYNOPSIS oldport = SetFileSysTask(port) D0 D1 struct MsgPort *SetFileSysTask(struct MsgPort *) FUNCTION Sets the default filesystem task's port (pr_FileSystemTask) for the current process. INPUTS port - The pr_MsgPort of the default filesystem for the process RESULT oldport - The previous FileSysTask value SEE ALSO GetFileSysTask(), Open() dos.library/SetIoErr dos.library/SetIoErr NAME SetIoErr -- Sets the value returned by IoErr() (V36) SYNOPSIS oldcode = SetIoErr(code) D0 D1 LONG SetIoErr(LONG); FUNCTION This routine sets up the secondary result (pr_Result2) return code (returned by the IoErr() function). INPUTS code - Code to be returned by a call to IoErr. RESULT oldcode - The previous error code. SEE ALSO IoErr(), Fault(), PrintFault() dos.library/SetMode dos.library/SetMode NAME SetMode - Set the current behavior of a handler (V36) SYNOPSIS success = SetMode(fh, mode) D0 D1 D2 BOOL SetMode(BPTR, LONG) FUNCTION SetMode() sends an ACTION_SCREEN_MODE packet to the handler in question, normally for changing a CON: handler to raw mode or vice-versa. For CON:, use 1 to go to RAW: mode, 0 for CON: mode. INPUTS fh - filehandle mode - The new mode you want RESULT success - Boolean SEE ALSO dos.library/SetOwner dos.library/SetOwner NAME SetOwner -- Set owner information for a file or directory (V39) SYNOPSIS success = SetOwner( name, owner_info ) D0 D1 D2 BOOL SetOwner (STRPTR, LONG) FUNCTION SetOwner() sets the owner information for the file or directory. This value is a 32-bit value that is normally split into 16 bits of owner user id (bits 31-16), and 16 bits of owner group id (bits 15-0). However, other than returning them as shown by Examine()/ ExNext()/ExAll(), the filesystem take no interest in the values. These are primarily for use by networking software (clients and hosts), in conjunction with the FIBF_OTR_xxx and FIBF_GRP_xxx protection bits. This entrypoint did not exist in V36, so you must open at least V37 dos.library to use it. V37 dos.library will return FALSE to this call. INPUTS name - pointer to a null-terminated string owner_info - owner uid (31:16) and group id (15:0) RESULTS success - boolean SEE ALSO SetProtect(), Examine(), ExNext(), ExAll(), <dos/dos.h> dos.library/SetProgramDir dos.library/SetProgramDir NAME SetProgramDir -- Sets the directory returned by GetProgramDir (V36) SYNOPSIS oldlock = SetProgramDir(lock) D0 D1 BPTR SetProgramDir(BPTR) FUNCTION Sets a shared lock on the directory the program was loaded from. This can be used for a program to find data files, etc, that are stored with the program, or to find the program file itself. NULL is a valid input. This can be accessed via GetProgramDir() or by using paths relative to PROGDIR:. INPUTS lock - A lock on the directory the current program was loaded from RESULT oldlock - The previous ProgramDir. SEE ALSO GetProgramDir(), Open() dos.library/SetProgramName dos.library/SetProgramName NAME SetProgramName -- Sets the name of the program being run (V36) SYNOPSIS success = SetProgramName(name) D0 D1 BOOL SetProgramName(STRPTR) FUNCTION Sets the name for the program in the cli structure. If the name is too long to fit, a failure is returned, and the old value is left intact. It is advised that you inform the user if possible of this condition, and/or set the program name to an empty string. This routine is safe to call even if there is no CLI structure. INPUTS name - Name of program to use. RESULT success - Success/failure indicator. BUGS This clips to a fixed (1.3 compatible) size. SEE ALSO GetProgramName() dos.library/SetPrompt dos.library/SetPrompt NAME SetPrompt -- Sets the CLI/shell prompt for the current process (V36) SYNOPSIS success = SetPrompt(name) D0 D1 BOOL SetPrompt(STRPTR) FUNCTION Sets the text for the prompt in the cli structure. If the prompt is too long to fit, a failure is returned, and the old value is left intact. It is advised that you inform the user of this condition. This routine is safe to call even if there is no CLI structure. INPUTS name - Name of prompt to be set. RESULT success - Success/failure indicator. BUGS This clips to a fixed (1.3 compatible) size. SEE ALSO GetPrompt() dos.library/SetProtection dos.library/SetProtection NAME SetProtection -- Set protection for a file or directory SYNOPSIS success = SetProtection( name, mask ) D0 D1 D2 BOOL SetProtection (STRPTR, LONG) FUNCTION SetProtection() sets the protection attributes on a file or directory. See <dos/dos.h> for a listing of protection bits. Before V36, the ROM filesystem didn't respect the Read and Write bits. In V36 or later and in the FFS, the Read and Write bits are respected. The archive bit should be cleared by the filesystem whenever the file is changed. Backup utilities will generally set the bit after backing up each file. The V36 Shell looks at the execute bit, and will refuse to execute a file if it is set. Other bits will be defined in the <dos/dos.h> include files. Rather than referring to bits by number you should use the definitions in <dos/dos.h>. INPUTS name - pointer to a null-terminated string mask - the protection mask required RESULTS success - boolean SEE ALSO SetComment(), Examine(), ExNext(), <dos/dos.h> dos.library/SetVar dos.library/SetVar NAME SetVar -- Sets a local or environment variable (V36) SYNOPSIS success = SetVar( name, buffer, size, flags ) D0 D1 D2 D3 D4 BOOL SetVar(STRPTR, STRPTR, LONG, ULONG ) FUNCTION Sets a local or environment variable. It is advised to only use ASCII strings inside variables, but not required. INPUTS name - pointer to an variable name. Note variable names follow filesystem syntax and semantics. buffer - a user allocated area which contains a string that is the value to be associated with this variable. size - length of the buffer region in bytes. -1 means buffer contains a null-terminated string. flags - combination of type of var to set (low 8 bits), and flags to control the behavior of this routine. Currently defined flags include: GVF_LOCAL_ONLY - set a local (to your process) variable. GVF_GLOBAL_ONLY - set a global environment variable. The default is to set a local environment variable. RESULT success - If non-zero, the variable was sucessfully set, FALSE indicates failure. BUGS LV_VAR is the only type that can be global SEE ALSO GetVar(), DeleteVar(), FindVar(), <dos/var.h> dos.library/SetVBuf dos.library/SetVBuf NAME SetVBuf -- set buffering modes and size (V39) SYNOPSIS error = SetVBuf(fh, buff, type, size) D0 D1 D2 D3 D4 LONG SetVBuf(BPTR, STRPTR, LONG, LONG) FUNCTION Changes the buffering modes and buffer size for a filehandle. With buff == NULL, the current buffer will be deallocated and a new one of (approximately) size will be allocated. If buffer is non-NULL, it will be used for buffering and must be at least max(size,208) bytes long, and MUST be longword aligned. If size is -1, then only the buffering mode will be changed. Note that a user-supplied buffer will not be freed if it is later replaced by another SetVBuf() call, nor will it be freed if the filehandle is closed. Has no effect on the buffersize of filehandles that were not created by AllocDosObject(). INPUTS fh - Filehandle buff - buffer pointer for buffered I/O or NULL. MUST be LONG-aligned! type - buffering mode (see <dos/stdio.h>) size - size of buffer for buffered I/O (sizes less than 208 bytes will be rounded up to 208), or -1. RESULT error - 0 if successful. NOTE: opposite of most dos functions! NOTE: fails if someone has replaced the buffer without using SetVBuf() - RunCommand() does this. Remember to check error before freeing user-supplied buffers! BUGS Not implemented until after V39. From V36 up to V39, always returned 0. SEE ALSO FputC(), FGetC(), UnGetC(), Flush(), FRead(), FWrite(), FGets(), FPuts(), AllocDosObject() dos.library/SplitName dos.library/SplitName NAME SplitName -- splits out a component of a pathname into a buffer (V36) SYNOPSIS newpos = SplitName(name, separator, buf, oldpos, size) D0 D1 D2 D3 D4 D5 WORD SplitName(STRPTR, UBYTE, STRPTR, WORD, LONG) FUNCTION This routine splits out the next piece of a name from a given file name. Each piece is copied into the buffer, truncating at size-1 characters. The new position is then returned so that it may be passed in to the next call to splitname. If the separator is not found within 'size' characters, then size-1 characters plus a null will be put into the buffer, and the position of the next separator will be returned. If a a separator cannot be found, -1 is returned (but the characters from the old position to the end of the string are copied into the buffer, up to a maximum of size-1 characters). Both strings are null-terminated. This function is mainly intended to support handlers. INPUTS name - Filename being parsed. separator - Separator charactor to split by. buf - Buffer to hold separated name. oldpos - Current position in the file. size - Size of buf in bytes (including null termination). RESULT newpos - New position for next call to splitname. -1 for last one. BUGS In V36 and V37, path portions greater than or equal to 'size' caused the last character of the portion to be lost when followed by a separator. Fixed for V39 dos. For V36 and V37, the suggested work- around is to call SplitName() with a buffer one larger than normal (for example, 32 bytes), and then set buf[size-2] to '0' (for example, buf[30] = '\0';). SEE ALSO FilePart(), PathPart(), AddPart() dos.library/StartNotify dos.library/StartNotify NAME StartNotify -- Starts notification on a file or directory (V36) SYNOPSIS success = StartNotify(notifystructure) D0 D1 BOOL StartNotify(struct NotifyRequest *) FUNCTION Posts a notification request. Do not modify the notify structure while it is active. You will be notified when the file or directory changes. For files, you will be notified after the file is closed. Not all filesystems will support this: applications should NOT require it. In particular, most network filesystems won't support it. INPUTS notifystructure - A filled-in NotifyRequest structure RESULT success - Success/failure of request BUGS The V36 floppy/HD filesystem doesn't actually send notifications. The V36 ram handler (ram:) does. This has been fixed for V37. SEE ALSO EndNotify(), <dos/notify.h> dos.library/StrToDate dos.library/StrToDate NAME StrToDate -- Converts a string to a DateStamp (V36) SYNOPSIS success = StrToDate( datetime ) D0 D1 BOOL StrToDate( struct DateTime * ) FUNCTION Converts a human readable ASCII string into an AmigaDOS DateStamp. INPUTS DateTime - a pointer to an initialized DateTime structure. The DateTime structure should be initialized as follows: dat_Stamp - ignored on input. dat_Format - a format byte which specifies the format of the dat_StrDat. This can be any of the following (note: If value used is something other than those below, the default of FORMAT_DOS is used): FORMAT_DOS: AmigaDOS format (dd-mmm-yy). FORMAT_INT: International format (yy-mmm-dd). FORMAT_USA: American format (mm-dd-yy). FORMAT_CDN: Canadian format (dd-mm-yy). FORMAT_DEF: default format for locale. dat_Flags - a flags byte. The only flag which affects this function is: DTF_SUBST: ignored by this function DTF_FUTURE: If set, indicates that strings such as (stored in dat_StrDate) "Monday" refer to "next" monday. Otherwise, if clear, strings like "Monday" refer to "last" monday. dat_StrDay - ignored bythis function. dat_StrDate - pointer to valid string representing the date. This can be a "DTF_SUBST" style string such as "Today" "Tomorrow" "Monday", or it may be a string as specified by the dat_Format byte. This will be converted to the ds_Days portion of the DateStamp. If this pointer is NULL, DateStamp->ds_Days will not be affected. dat_StrTime - Pointer to a buffer which contains the time in the ASCII format hh:mm:ss. This will be converted to the ds_Minutes and ds_Ticks portions of the DateStamp. If this pointer is NULL, ds_Minutes and ds_Ticks will be unchanged. RESULT success - a zero return indicates that a conversion could not be performed. A non-zero return indicates that the DateTime.dat_Stamp variable contains the converted values. SEE ALSO DateStamp(), DateToStr(), <dos/datetime.h> dos.library/StrToLong dos.library/StrToLong NAME StrToLong -- string to long value (decimal) (V36) SYNOPSIS characters = StrToLong(string,value) D0 D1 D2 LONG StrToLong(STRPTR, LONG *) FUNCTION Converts decimal string into LONG value. Returns number of characters converted. Skips over leading spaces & tabs (included in count). If no decimal digits are found (after skipping leading spaces & tabs), StrToLong returns -1 for characters converted, and puts 0 into value. INPUTS string - Input string. value - Pointer to long value. Set to 0 if no digits are converted. RESULT result - Number of characters converted or -1. BUGS Before V39, if there were no convertible characters it returned the number of leading white-space characters (space and tab in this case). dos.library/SystemTagList dos.library/SystemTagList NAME SystemTagList -- Have a shell execute a command line (V36) SYNOPSIS error = SystemTagList(command, tags) D0 D1 D2 LONG SystemTagList(STRPTR, struct TagItem *) error = System(command, tags) D0 D1 D2 LONG System(STRPTR, struct TagItem *) error = SystemTags(command, Tag1, ...) LONG SystemTags(STRPTR, ULONG, ...) FUNCTION Similar to Execute(), but does not read commands from the input filehandle. Spawns a Shell process to execute the command, and returns the returncode the command produced, or -1 if the command could not be run for any reason. The input and output filehandles will not be closed by System, you must close them (if needed) after System returns, if you specified them via SYS_Input or SYS_Output. By default the new process will use your current Input() and Output() filehandles. Normal Shell command-line parsing will be done including redirection on 'command'. The current directory and path will be inherited from your process. Your path will be used to find the command (if no path is specified). Note that you may NOT pass the same filehandle for both SYS_Input and SYS_Output. If used with the SYS_Asynch flag, it WILL close both it's input and output filehandles after running the command (even if these were your Input() and Output()!) Normally uses the boot (ROM) shell, but other shells can be specified via SYS_UserShell and SYS_CustomShell. Normally, you should send things written by the user to the UserShell. The UserShell defaults to the same shell as the boot shell. The tags are passed through to CreateNewProc() (tags that conflict with SystemTagList() will be filtered out). This allows setting things like priority, etc for the new process. INPUTS command - Program and arguments tags - see <dos/dostags.h>. Note that both SystemTagList()- specific tags and tags from CreateNewProc() may be passed. RESULT error - 0 for success, result from command, or -1. Note that on error, the caller is responsible for any filehandles or other things passed in via tags. SEE ALSO Execute(), CreateNewProc(), <dos/dostags.h>, Input(), Output() dos.library/UnGetC dos.library/UnGetC NAME UnGetC -- Makes a char available for reading again. (buffered) (V36) SYNOPSIS value = UnGetC(fh, character) D0 D1 D2 LONG UnGetC(BPTR, LONG) FUNCTION Pushes the character specified back into the input buffer. Every time you use a buffered read routine, you can always push back 1 character. You may be able to push back more, though it is not recommended, since there is no guarantee on how many can be pushed back at a given moment. Passing -1 for the character will cause the last character read to be pushed back. If the last character read was an EOF, the next character read will be an EOF. Note: UnGetC can be used to make sure that a filehandle is set up as a read filehandle. This is only of importance if you are writing a shell, and must manipulate the filehandle's buffer. INPUTS fh - filehandle to use for buffered I/O character - character to push back or -1 RESULT value - character pushed back, or FALSE if the character cannot be pushed back. BUGS In V36, UnGetC(fh,-1) after an EOF would not cause the next character read to be an EOF. This was fixed for V37. SEE ALSO FGetC(), FPutC(), Flush() dos.library/UnLoadSeg dos.library/UnLoadSeg NAME UnLoadSeg -- Unload a seglist previously loaded by LoadSeg() SYNOPSIS success = UnLoadSeg( seglist ) D0 D1 BOOL UnLoadSeg(BPTR) FUNCTION Unload a seglist loaded by LoadSeg(). 'seglist' may be zero. Overlaid segments will have all needed cleanup done, including closing files. INPUTS seglist - BCPL pointer to a segment identifier RESULTS success - returns 0 if a NULL seglist was passed or if it failed to close an overlay file. NOTE: this function returned a random value before V36! SEE ALSO LoadSeg(), InternalLoadSeg(), InternalUnLoadSeg() dos.library/UnLock dos.library/UnLock NAME UnLock -- Unlock a directory or file SYNOPSIS UnLock( lock ) D1 void UnLock(BPTR) FUNCTION The filing system lock (obtained from Lock(), DupLock(), or CreateDir()) is removed and deallocated. INPUTS lock - BCPL pointer to a lock NOTE passing zero to UnLock() is harmless SEE ALSO Lock(), DupLock(), ParentOfFH(), DupLockFromFH() dos.library/UnLockDosList dos.library/UnLockDosList NAME UnLockDosList -- Unlocks the Dos List (V36) SYNOPSIS UnLockDosList(flags) D1 void UnLockDosList(ULONG) FUNCTION Unlocks the access on the Dos Device List. You MUST pass the same flags you used to lock the list. INPUTS flags - MUST be the same flags passed to (Attempt)LockDosList() SEE ALSO AttemptLockDosList(), LockDosList(), Permit() dos.library/UnLockRecord dos.library/UnLockRecord NAME UnLockRecord -- Unlock a record (V36) SYNOPSIS success = UnLockRecord(fh,offset,length) D0 D1 D2 D3 BOOL UnLockRecord(BPTR,ULONG,ULONG) FUNCTION This releases the specified lock on a file. Note that you must use the same filehandle you used to lock the record, and offset and length must be the same values used to lock it. Every LockRecord() call must be balanced with an UnLockRecord() call. INPUTS fh - File handle of locked file offset - Record start position length - Length of record in bytes RESULT success - Success or failure. BUGS See LockRecord() SEE ALSO LockRecords(), LockRecord(), UnLockRecords() dos.library/UnLockRecords dos.library/UnLockRecords NAME UnLockRecords -- Unlock a list of records (V36) SYNOPSIS success = UnLockRecords(record_array) D0 D1 BOOL UnLockRecords(struct RecordLock *) FUNCTION This releases an array of record locks obtained using LockRecords. You should NOT modify the record_array while you have the records locked. Every LockRecords() call must be balanced with an UnLockRecords() call. INPUTS record_array - List of records to be unlocked RESULT success - Success or failure. BUGS See LockRecord() SEE ALSO LockRecords(), LockRecord(), UnLockRecord() dos.library/VFPrintf dos.library/VFPrintf NAME VFPrintf -- format and print a string to a file (buffered) (V36) SYNOPSIS count = VFPrintf(fh, fmt, argv) D0 D1 D2 D3 LONG VFPrintf(BPTR, STRPTR, LONG *) count = FPrintf(fh, fmt, ...) LONG FPrintf(BPTR, STRPTR, ...) FUNCTION Writes the formatted string and values to the given file. This routine is assumed to handle all internal buffering so that the formatting string and resultant formatted values can be arbitrarily long. Any secondary error code is returned in IoErr(). This routine is buffered. INPUTS fh - Filehandle to write to fmt - RawDoFmt() style formatting string argv - Pointer to array of formatting values RESULT count - Number of bytes written or -1 (EOF) for an error BUGS The prototype for FPrintf() currently forces you to cast the first varargs parameter to LONG due to a deficiency in the program that generates fds, prototypes, and amiga.lib stubs. SEE ALSO VPrintf(), VFWritef(), RawDoFmt(), FPutC() dos.library/VFWritef dos.library/VFWritef NAME VFWritef - write a BCPL formatted string to a file (buffered) (V36) SYNOPSIS count = VFWritef(fh, fmt, argv) D0 D1 D2 D3 LONG VFWritef(BPTR, STRPTR, LONG *) count = FWritef(fh, fmt, ...) LONG FWritef(BPTR, STRPTR, ...) FUNCTION Writes the formatted string and values to the specified file. This routine is assumed to handle all internal buffering so that the formatting string and resultant formatted values can be arbitrarily long. The formats are in BCPL form. This routine is buffered. Supported formats are: (Note x is in base 36!) %S - string (CSTR) %Tx - writes a left-justified string in a field at least x bytes long. %C - writes a single character %Ox - writes a number in octal, maximum x characters wide %Xx - writes a number in hex, maximum x characters wide %Ix - writes a number in decimal, maximum x characters wide %N - writes a number in decimal, any length %Ux - writes an unsigned number, maximum x characters wide %$ - ignore parameter Note: 'x' above is actually the character value - '0'. INPUTS fh - filehandle to write to fmt - BCPL style formatting string argv - Pointer to array of formatting values RESULT count - Number of bytes written or -1 for error BUGS As of V37, VFWritef() does NOT return a valid return value. In order to reduce possible errors, the prototypes supplied for the system as of V37 have it typed as VOID. SEE ALSO VFPrintf(), VFPrintf(), FPutC() dos.library/VPrintf dos.library/VPrintf NAME VPrintf -- format and print string (buffered) (V36) SYNOPSIS count = VPrintf(fmt, argv) D0 D1 D2 LONG VPrintf(STRPTR, LONG *) count = Printf(fmt, ...) LONG Printf(STRPTR, ...) FUNCTION Writes the formatted string and values to Output(). This routine is assumed to handle all internal buffering so that the formatting string and resultant formatted values can be arbitrarily long. Any secondary error code is returned in IoErr(). This routine is buffered. Note: RawDoFmt assumes 16 bit ints, so you will usually need 'l's in your formats (ex: %ld versus %d). INPUTS fmt - exec.library RawDoFmt() style formatting string argv - Pointer to array of formatting values RESULT count - Number of bytes written or -1 (EOF) for an error BUGS The prototype for Printf() currently forces you to cast the first varargs parameter to LONG due to a deficiency in the program that generates fds, prototypes, and amiga.lib stubs. SEE ALSO VFPrintf(), VFWritef(), RawDoFmt(), FPutC() dos.library/WaitForChar dos.library/WaitForChar NAME WaitForChar -- Determine if chars arrive within a time limit SYNOPSIS status = WaitForChar( file, timeout ) D0 D1 D2 BOOL WaitForChar(BPTR, LONG) FUNCTION If a character is available to be read from 'file' within the time (in microseconds) indicated by 'timeout', WaitForChar() returns -1 (TRUE). If a character is available, you can use Read() to read it. Note that WaitForChar() is only valid when the I/O stream is connected to a virtual terminal device. If a character is not available within 'timeout', a 0 (FALSE) is returned. BUGS Due to a bug in the timer.device in V1.2/V1.3, specifying a timeout of zero for WaitForChar() can cause the unreliable timer & floppy disk operation. INPUTS file - BCPL pointer to a file handle timeout - integer RESULTS status - boolean SEE ALSO Read(), FGetC() dos.library/WaitPkt dos.library/WaitPkt NAME WaitPkt -- Waits for a packet to arrive at your pr_MsgPort (V36) SYNOPSIS packet = WaitPkt() D0 struct DosPacket *WaitPkt(void); FUNCTION Waits for a packet to arrive at your pr_MsgPort. If anyone has installed a packet wait function in pr_PktWait, it will be called. The message will be automatically GetMsg()ed so that it is no longer on the port. It assumes the message is a dos packet. It is NOT guaranteed to clear the signal for the port. RESULT packet - the packet that arrived at the port (from ln_Name of message). SEE ALSO SendPkt(), DoPkt(), AbortPkt() dos.library/Write dos.library/Write NAME Write -- Write bytes of data to a file SYNOPSIS returnedLength = Write( file, buffer, length ) D0 D1 D2 D3 LONG Write (BPTR, void *, LONG) FUNCTION Write() writes bytes of data to the opened file 'file'. 'length' indicates the length of data to be transferred; 'buffer' is a pointer to the buffer. The value returned is the length of information actually written. So, when 'length' is greater than zero, the value of 'length' is the number of characters written. Errors are indicated by a value of -1. Note: this is an unbuffered routine (the request is passed directly to the filesystem.) Buffered I/O is more efficient for small reads and writes; see FPutC(). INPUTS file - BCPL pointer to a file handle buffer - pointer to the buffer length - integer RESULTS returnedLength - integer SEE ALSO Read(), Seek(), Open(), Close(), FPutC dos.library/WriteChars dos.library/WriteChars NAME WriteChars -- Writes bytes to the the default output (buffered) (V36) SYNOPSIS count = WriteChars(buf, buflen) D0 D1 LONG WriteChars(STRPTR, LONG) FUNCTION This routine writes a number of bytes to the default output. The length is returned. This routine is buffered. INPUTS buf - buffer of characters to write buflen - number of characters to write RESULT count - Number of bytes written. -1 (EOF) indicates an error SEE ALSO FPuts(), FPutC(), FWrite(), PutStr()