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Text File | 1997-11-21 | 56.8 KB | 1,750 lines

TABLE OF CONTENTS net.lib/autoinit net.lib/autoinit_timer.device net.lib/autoinit_usergroup.library net.lib/charRead net.lib/chmod net.lib/chown net.lib/dup net.lib/dup2 net.lib/fstat net.lib/gettimeofday net.lib/herror net.lib/init_inet_daemon net.lib/lineRead net.lib/lstat net.lib/perror net.lib/popen net.lib/PrintNetFault net.lib/PrintUserFault net.lib/rcmd net.lib/serveraccept net.lib/set_socket_stdio net.lib/sleep net.lib/stat net.lib/strerror net.lib/syslog net.lib/usleep net.lib/utime net.lib/autoinit net.lib/autoinit NAME autoinit - SAS C Autoinitialization Functions SYNOPSIS LONG _STI_200_openSockets(void) void _STD_200_closeSockets(void) FUNCTION These functions open and close the bsdsocket.library at the startup and exit of the program, respectively. For a program to use these functions, it must be linked with netlib:net.lib (or some variant). These functions are linked in only if the program references the global symbol "SocketBase". If the library can be opened, the _STI_200_openSockets() calls bsdsocket.library function SocketBaseTags() to tell the library the address and the size of the errno variable of the calling program, the program name (to be used in syslog() messages) and the address of the h_error variable (in which the name resolver errors are returned). NOTES _STI_200_openSockets() also checks that the system version is at least 37. It also puts up a requester if the bsdsocket.library is not found or is of wrong version. The autoinitialization and autotermination functions are features specific to the SAS C6. However, these functions can be used with other (ANSI) C compilers, too. Example follows: /* at start of main() */ atexit(_STD_200_closeSockets); if (_STD_200_openSockets() != 0) exit(20); BUGS The same autoinitialization won't work for both SAS C 6.3 and SAS C 6.50 or latter. Only way to terminate an initialization function is by exit() call with SAS C 6.3 binary. If an autoinitialization function is terminated by exit() call with SAS C 6.50 binary, the autotermination functions won't be called. Due this braindamage these compilers require separate net.lib libraries. SEE ALSO bsdsocket.library/SocketBaseTags(), SAS/C 6 User's Guide p. 145 for details of autoinitialization and autotermination functions. net.lib/autoinit_timer.device net.lib/autoinit_timer.device NAME timerinit - SAS C Autoinitialization Functions for timer.device SYNOPSIS _STIopenTimer() LONG _STI_200_openTimer(void) _STDcloseTimer() void _STD_200_closeTimer(void) FUNCTION These functions open and close the timer.device at the startup and exit of the program, respectively. For a program to use these functions, it must be linked with netlib:net.lib. The opened device base is stored in the TimerBase global variable. If the device can be opened, the _STIopenTimer() sets up the time zone information, which is used by the gettimeofday() function. NOTES The time zone information is got from the environment variable named TZ. The format for this variable is: zzznnnddd where zzz is three letter identifier for the time zone (for example GMT), and the nnn is hours west from Greenwich on range [-23,24] (negative values are to east). The last field is the abbreviation for the local daylight saving time zone (which is not interpreted by this version). If the TZ environment variable cannot be found, Greenwich Mean Time (GMT) is used instead. The autoinitialization and autotermination functions are features specific to the SAS C6. However, these functions can be used with other (ANSI) C compilers, too. Example follows: /* at start of main() */ atexit(_STDcloseTimer); _STDopenTimer(); BUGS TZ "hours west from GMT" should be interpreted as float. The same autoinitialization won't work for both SAS C 6.3 and SAS C 6.50 or latter. Only way to terminate an initialization function is by exit() call with SAS C 6.3 binary. If an autoinitialization function is terminated by exit() call with SAS C 6.50 binary, the autotermination functions won't be called. Due this braindamage these compilers require separate net.lib libraries. SEE ALSO net.lib/gettimeofday(), SAS/C 6 User's Guide p. 145 for details of autoinitialization and autotermination functions. net.lib/autoinit_usergroup.library net.lib/autoinit_usergroup.library NAME autoinit usergroup.library - SAS C Autoinitialization Functions SYNOPSIS error = _STI_200_openUserGroup() LONG _STI_200_openUserGroup(void) _STD_200_closeUserGroup() void _STD_200_closeUserGroup(void) FUNCTION These functions open and close the usergroup.library at the startup and exit of the program, respectively. For a program to use these functions, it must be linked with netlib:usr.lib. NOTES _STI_200_openUserGroup() also checks that the system version is at least 37. It puts up a requester if the usergroup.library is not found or is too old version. The autoinitialization and autotermination functions are features specific to the SAS C6. However, these functions can be used with other (ANSI) C compilers, too. Example follows: /* at start of main() */ atexit(_STD_200_closeUserGroup); if (_STI_200_openUserGroup() != 0) exit(20); BUGS The same autoinitialization won't work for both SAS C 6.3 and SAS C 6.50 or latter. Only way to terminate an initialization function is by exit() call with SAS C 6.3 binary. If an autoinitialization function is terminated by exit() call with SAS C 6.50 binary, the autotermination functions won't be called. Due this braindamage these compilers require separate net.lib libraries. SEE ALSO SAS/C 6 User's Guide p. 145 for details of autoinitialization and autotermination functions. net.lib/charRead net.lib/charRead NAME charRead -- read characters from socket one by one. SYNOPSIS initCharRead(rc, fd) void initCharRead(struct CharRead *, int); character = charRead(rc) int charRead(struct CharRead *); DESCRIPTION charRead is a macro package which return characters one by one from given socket input stream. The socket where data is to be read is set by calling initCharRead(): rc is the pointer to charread structure previously allocated. fd is the (socket) descriptor where reading is to be done. charRead() returns the next character from input stream or one of the following: RC_DO_SELECT (-3) - read input buffer is returned. Do select before next call if you don't want charread to block. RC_EOF (-2) - end-of-file condition has occurred. RC_ERROR (-1) - there has been an error while filling new charread buffer. Check the value of Errno() NOTE Always use variable of type int to store return value from charRead() since the numeric value of characters returned may vary between 0 -255 (or even greater). As you may know, -3 equals 253 if of type unsigned char. EXAMPLE /* * This piece of code shows how to use charread with select() */ #include <sys/types.h> #include <sys/socket.h> #include <charread.h> main_loop(int sock) { struct CharRead rc; fd_set readfds; int c; initCharRead(&rc, sock); FD_ZERO(&readfds); while(1) { FD_SET(sock, &readfds); if (select(sock + 1. &readfds, NULL, NULL, NULL)) < 0) { perror("select"); break; } if (FD_ISSET(sock, &readfds)) { while((c = charRead(&rc)) >= 0) handle_next_input_character(c); if (c == RC_EOF) break; if (c == RC_ERROR) { perror("charRead"); break; } } } } PORTABILITY The source file charread.h should be able to be used in UNIX programs as is. AUTHORS Tomi Ollila, the AmiTCP/IP Group <amitcp-group@hut.fi>, SEE ALSO lineRead(), bsdsocket.library/recv() net.lib/chmod net.lib/chmod NAME chmod, fchmod - change mode of file SYNOPSIS #include <sys/stat.h> int chmod(const char *path, mode_t mode); int fchmod(int fd, mode_t mode); DESCRIPTION The function chmod() sets the file permission bits of the file specified by the pathname path to mode. Fchmod() sets the permission bits of the specified file descriptor fd. Chmod() verifies that the process owner (user) either owns the file specified by path (or fd), or is the super-user. A mode is created from or'd permission bit masks defined in <sys/stat.h>: #define S_IRWXU 0000700 /* RWX mask for owner */ #define S_IRUSR 0000400 /* R for owner */ #define S_IWUSR 0000200 /* W for owner */ #define S_IXUSR 0000100 /* X for owner */ #define S_IRWXG 0000070 /* RWX mask for group */ #define S_IRGRP 0000040 /* R for group */ #define S_IWGRP 0000020 /* W for group */ #define S_IXGRP 0000010 /* X for group */ #define S_IRWXO 0000007 /* RWX mask for other */ #define S_IROTH 0000004 /* R for other */ #define S_IWOTH 0000002 /* W for other */ #define S_IXOTH 0000001 /* X for other */ #define S_ISUID 0004000 /* set user id on execution */ #define S_ISGID 0002000 /* set group id on execution */ #define S_ISVTX 0001000 /* save swapped text even after use * / The ISVTX (the sticky bit) indicates to the system which executable files are shareable (pure). Writing or changing the owner of a file turns off the set-user-id and set-group-id bits unless the user is the super-user. This makes the system somewhat more secure by protecting set-user-id (set-group-id) files from remaining set-user-id (set-group-id) if they are modified. RETURN VALUES Upon successful completion, a value of 0 is returned. Otherwise, a value of -1 is returned and errno is set to indicate the error. ERRORS Chmod() will fail and the file mode will be unchanged if: [ENOTDIR] A component of the path prefix is not a directory. [ENAMETOOLONG] A component of a pathname exceeded 255 characters, or an entire path name exceeded 1023 characters. [ENOENT] The named file does not exist. [EACCES] Search permission is denied for a component of the path prefix. [EPERM] The effective user ID does not match the owner of the file and the effective user ID is not the super-user. [EROFS] The named file resides on a read-only file system. [EFAULT] Path points outside the process's allocated address space. [EIO] An I/O error occurred while reading from or writing to the file system. Fchmod() will fail if: [EBADF] The descriptor is not valid. [EINVAL] Fd refers to a socket, not to a file. [EROFS] The file resides on a read-only file system. [EIO] An I/O error occurred while reading from or writing to the file system. NOTES This call is provided for Unix compatibility. It does not know all Amiga protection bits (Delete, Archive, Script). The archive and script bits are cleared, Delete set according the Write bit. SEE ALSO open(), chown(), stat() net.lib/chown net.lib/chown NAME chown - change owner and group of a file SYNOPSIS #include <unistd.h> success = chown(path, owner, group) int chown(const char *, uid_t, gid_t); DESCRIPTION The owner ID and group ID of the file named by path or referenced by fd is changed as specified by the arguments owner and group. The owner of a file may change the group to a group of which he or she is a member, but the change owner capability is restricted to the super-user. Chown() clears the set-user-id and set-group-id bits on the file to prevent accidental or mischievious creation of set-user-id and set-group-id programs. One of the owner or group id's may be left unchanged by specifying it as -1. If the final component of path is a symbolic link, the ownership and group of the symbolic link is changed, not the ownership and group of the file or directory to which it points. RETURN VALUES Zero is returned if the operation was successful; -1 is returned if an error occurs, with a more specific error code being placed in the global variable errno. ERRORS Chown() will fail and the file will be unchanged if: [ENOTDIR] A component of the path prefix is not a directory. [EINVAL] The pathname contains a character with the high-order bit set. [ENAMETOOLONG] A component of a pathname exceeded 80 characters, or an entire path name exceeded 1023 characters. [ENOENT] The named file does not exist. [EACCES] Search permission is denied for a component of the path prefix. [ELOOP] Too many symbolic links were encountered in translating the pathname. [EPERM] The effective user ID is not the super-user. [EROFS] The named file resides on a read-only file system. [EFAULT] Path points outside the process's allocated address space. [EIO] An I/O error occurred while reading from or writing to the file system. SEE ALSO chmod(2) net.lib/dup net.lib/dup NAME dup, dup2 - duplicate an existing file descriptor SYNOPSIS #include <unistd.h> int dup(int oldd) int dup2(int oldd, int newd) FUNCTION Dup() duplicates an existing object descriptor and returns its value to the calling program (newd = dup(oldd)). The argument oldd is a small nonnegative integer index in the program's descriptor table. The value must be less than the size of the table, which is returned by getdtablesize(). The new descriptor returned by the call is the lowest numbered descriptor currently not in use by the program. The object referenced by the descriptor does not distinguish between oldd and newd in any way. Thus if newd and oldd are duplicate references to an open file, read() and write() calls all move a single pointer into the file, and append mode, non-blocking I/O and asynchronous I/O options are shared between the references. If a separate pointer into the file is desired, a different object reference to the file must be obtained by issuing an additional open() call. The close-on-exec flag on the new file descriptor is unset. In dup2(), the value of the new descriptor newd is specified. If this descriptor is already in use, the descriptor is first deallocated as if a close() call had been done first. RETURN VALUES The value -1 is returned if an error occurs in either call. The external variable errno indicates the cause of the error. BUGS The current UFB implementation for SAS C allows only sockets to be duplicated. ERRORS Dup() and dup2() fail if: [EBADF] Oldd or newd is not a valid active descriptor [EMFILE] Too many descriptors are active. SEE ALSO accept(), open(), close(), socket(), getdtablesize() STANDARDS Dup() and dup2() are expected to conform to IEEE Std 1003.1-1988 (``POSIX''). COPYRIGHT This manual page is copyright © 1980, 1991 Regents of the University of California. All rights reserved. net.lib/dup2 net.lib/dup2 SEE ALSO dup() net.lib/fstat net.lib/fstat SEE ALSO stat() net.lib/gettimeofday net.lib/gettimeofday NAME gettimeofday - get date and time SYNOPSIS #include <sys/time.h> error = gettimeofday(tp, tzp) int gettimeofday(struct timeval *, struct timezone *) FUNCTION The system's notion of the current Greenwich time and the current time zone is obtained with the gettimeofday() call. The time is expressed in seconds and microseconds since midnight (0 hour), January 1, 1970. The resolution of the system clock is hardware dependent. If tzp is zero, the time zone information will not be returned. Also, if your system software is unable to provide time zone information, the structure pointed by tzp will be filled with zeroes. PORTABILITY UNIX INPUTS The structures pointed to by tp and tzp are defined in <sys/time.h> as: struct timeval { long tv_sec; /* seconds since Jan. 1, 1970 */ long tv_usec; /* and microseconds */ }; struct timezone { int tz_minuteswest; /* of Greenwich */ int tz_dsttime; /* type of dst correction to apply */ }; The timezone structure indicates the local time zone (meas- ured in minutes of time westward from Greenwich), and a flag that, if nonzero, indicates that Daylight Saving time applies locally during the appropriate part of the year. RESULT Returns 0 when successful and -1 with specific error code in errno in case of an error. No error codes are specified, however. NOTES gettimeofday() uses GetSysTime() function of the timer.device, which is new to V36 of the device. Time zone information is taken from the locale.library, if it is available (it is included in all Amiga systems from 2.1 and up). Otherwise the environment variable "TZ" is consulted. If it fails, the time zone is initialized to the GMT. Global variable TimerBase _must_ be initialized before gettimeofday() is called. This is normally done automatically by the autoinit module (timerinit.c) included in the net.lib. SEE ALSO timer.device/GetSysTime() net.lib/herror net.lib/herror NAME herror - print name resolver error message to stderr. SYNOPSIS #include <stdio.h> herror(banner) void herror(const char *) FUNCTION The herror() function finds the error message corresponding to the current value of host error using the SocketBaseTags() and writes it, followed by a newline, to the stderr. If the argument string is non-NULL it is used as a prefix to the message string and separated from it by a colon and space (`: '). If the argument is NULL only the error message string is printed. NOTES The herror() function requires the stdio functions to be linked. SEE ALSO <netinclude:netdb.h>, SocketBaseTagList(), perror() net.lib/init_inet_daemon net.lib/init_inet_daemon NAME init_inet_daemon - obtain socket accepted by the inetd SYNOPSIS int init_inet_daemon(void); FUNCTION Obtain the server socket accepted by the inetd, the Internet super-server. RETURN VALUES socket descriptor if successful, -1 with specific error code on errno otherwise. ERRORS ENXIO - The process was not started by the inetd. NOTES If the process was started by the inetd, but the ObtainSocket() call fails, then this function exit()s with some specific exit code, so that inetd can clean up the unobtained socket. Use the net.lib function set_socket_stdio() to redirect stdio, stdout and stderr to the returned socket, if necessary. AUTHOR Jarno Rajahalme, Pekka Pessi, the AmiTCP/IP Group <amitcp-group@hut.fi>, Helsinki University of Technology, Finland. SEE ALSO serveraccept(), set_socket_stdio(), bsdsocket/ObtainSocket(), netutil/inetd net.lib/lineRead net.lib/lineRead NAME lineRead -- read newline terminated strings from socket SYNOPSIS initLineRead(rl, fd, lftype, bufsize) void initLineRead(struct LineRead *, int, int, int); length = lineRead(rl) int lineread(struct LineRead *); FUNCTION lineRead() reads newline terminated strings from given descriptor very efficiently. All the options needed are set by calling initLineRead(): rl is the pointer to lineread structure previously allocated. fd is the (socket) descriptor where reading is to be done. lftype can have following 3 values: RL_LFNOTREQ - Newline terminated strings are returned unless there is no newlines left in currently buffered input. In this case remaining buffer is returned. RL_LFREQLF - If there is no newlines left in currently buffered input the remaining input data is copied at the start of buffer. Caller is informed that next call will fill the buffer (and it may block). Lines are always returned with newline at the end unless the string is longer than whole buffer. RL_LFREQNUL - Like LF_REQLF, but remaining newline is removed. Note here that lenght is one longer that actual string length since line that has only one newline at the end would return length as 0 which indigate string incomplete condition. bufsize is used to tell lineread how big the receive buffer is. always put RL_BUFSIZE here since that value is used to determine the memory allocated for the buffer. This option is given to you so you may decide to use different buffer size than the default 1024. lineRead() returns the newline terminated string in rl_line field of lineread structure. Return values of lineRead() are: 1 - RL_BUFSIZE - normal length of returned string. 0 - If zero is returned just after select(), end-of-file condition has occurred. Otherwise string is not completed yet. Make sure you call select() (or use non- blocking IO) if you don't want next call to block. -1 - if rl_Line field of lineread structure is NULL, it indicates error condition. If rl_Line points to start of string buffer, input string has been longer than buffer. In this case rl_Line points to zero terminated string of length RL_BUFSIZE. You may modify the zero terminated string returned by lineRead() in any way, but memory around the string is private lineread memory. EXAMPLE /* * The following code shows how to use lineread with select() */ #ifdef USE_LOW_MEMORY_BUFFER #define RL_BUFSIZE 256 #endif #include <sys/types.h> #ifdef AMIGA #include <bsdsocket.h> #endif #include <lineread.h> #define NULL 0 ... main_loop(int sock) { struct LineRead * rl; int length; fd_set reafdfs; if (rl = (struct LineRead *)AllocMem(sizeof (*rl), 0)) { initLineRead(rl, sock, LF_REQLF, RL_BUFSIZE); FD_ZERO(&readfds); while(1) { FD_SET(sock, &readfds); if (select(sock + 1, &readfds, NULL, NULL, NULL)) < 0) { perror("select"); break; } if (FD_ISSET(sock, &readfds)) if ((length = lineRead(rl)) == 0) /* EOF */ break; do { if (length > 0) write(1, rl->rl_Line, length); /* stdout. write() for */ /* speed demonstration */ else { /* length == -1 */ if (rl->rl_Line == NULL); { perror("lineRead"); break; } else { fprintf(stderr, "lineread input buffer overflow!\n"); write(1, rl->rl_Line, RL_BUFSIZE); write(1, "\n", 1); } } } while ((length = lineRead(rl)) != 0); /* 0 -> do select() */ } FreeMem(rl, sizeof (*rl); } else fprintf("AllocMem: Out Of memory\n"); } PORTABILITY The source modules lineread.c and lineread.h should compile in UNIX machines as is. AUTHORS Tomi Ollila, the AmiTCP/IP Group <amitcp-group@hut.fi>, SEE ALSO charRead(), bsdsocket.library/recv() net.lib/lstat net.lib/lstat SEE ALSO stat() net.lib/perror net.lib/perror NAME perror - socket error messages SYNOPSIS extern int errno; #include <stdio.h> perror(banner) void perror(const char *) FUNCTION The perror() function finds the error message corresponding to the current value of the global variable errno and writes it, followed by a newline, to the stderr. If the argument string is non-NULL it is preappended to the message string and separated from it by a colon and space (`: '). If string is NULL only the error message string is printed. NOTES The perror() function requires the stdio functions to be linked. SEE ALSO strerror(), PrintNetFault(), <netinclude:sys/errno.h> net.lib/popen net.lib/popen NAME popen, pclose - initiate I/O to/from a process SYNOPSIS #include <stdio.h> FILE *popen(command, type) char *command, *type; pclose(stream) FILE *stream; DESCRIPTION The arguments to popen are pointers to null-terminated strings containing respectively a command line and an I/O mode, either "r" for reading or "w" for writing. It creates a pipe between the calling process and the command to be executed. The value returned is a stream pointer that can be used (as appropriate) to write to the standard input of the command or read from its standard output. A stream opened by popen **MUST** be closed by pclose, which waits for the associated process to terminate and returns the exit status of the command. Because stdio files are shared, a type "r" command may be used as an input filter, and a type "w" as an output filter. DIAGNOSTICS Popen returns a null pointer if files or processes cannot be created. Pclose returns -1 if stream is not associated with a `popened' command. AUTHOR Original version by Rick Schaeffer <ricks@isc-br.isc-br.com> / include <stdio.h> include <stdlib.h> include <string.h> include <stdarg.h> include <exec/types.h> include <exec/memory.h> include <dos/dos.h> include <dos/dosextens.h> include <dos/record.h> include <dos/dostags.h> include <proto/exec.h> include <proto/dos.h> include <clib/alib_protos.h> include <errno.h> define NOTDEF xtern char *mktemp(char *); truct POmsg { struct Message POm; int rc; char *cmd; struct Library *DOSBase; }; truct pstruct { FILE *fptr; struct POmsg childmsg; }; define MAXPIPES 6 tatic struct pstruct poarray[MAXPIPES]; tatic int childprocess(void); ILE *popen(const char *cmd, const char *mode) static char tempname[] = "pipe:pXXX.XXX"; char *pname,redir[20]; short i; int pmode; struct pstruct *poptr; BPTR pfd; struct Process *child; struct CommandLineInterface *cli; BPTR Binfh, Boutfh; ULONG closeinp, closeoutp; ULONG stacksize; struct Process *thistask; /* First, get pointers to our process and cli structs */ thistask = (struct Process *) FindTask(NULL); cli = Cli(); poptr = NULL; /* now find an open pipe (we currently only allow 6 simultaneously open pipes) */ for (i=0; i<MAXPIPES; i++) { if (poarray[i].fptr == NULL) { poptr = &poarray[i]; break; } } if (poptr == NULL) { fprintf(stderr,"popen: Unable to find an open pipe\n"); errno = EMFILE; return(NULL); } if (strcmp(mode,"r") == 0) pmode = MODE_NEWFILE; else if (strcmp(mode,"w") == 0) pmode = MODE_OLDFILE; else { fprintf(stderr,"popen: Mode must be 'r' or 'w'\n"); errno = EINVAL; return(NULL); } /* Try to make a guaranteed unique file name for the pipe */ strcpy(redir,tempname); redir[5] = 'a' + i; pname = mktemp(redir); /* set up a pipe: file name */ /* Now get the child's stack and priority set up */ if (cli) stacksize = cli->cli_DefaultStack << 2; else stacksize = thistask->pr_StackSize; /* Open the side of the pipe for the child */ pfd = Open(pname,pmode); if (pfd == 0) { errno = __io2errno(_OSERR = IoErr()); fprintf(stderr,"popen: Unable to open pipe file\n"); return(NULL); } /* set up the tags for the new process */ if (pmode == MODE_NEWFILE) { Binfh = (Tag) Input(); Boutfh = (Tag) pfd; closeinp = FALSE; closeoutp = TRUE; } else { Binfh = (Tag) pfd; Boutfh = (Tag) Output(); closeinp = TRUE; closeoutp = FALSE; } /* create the command. since the "System" function runs through the default shell, we need to tell it not to fail so that we ALWAYS get back the exit status. This wouldn't be necessary if the CLI created by the System function inherited the parent's FAILAT level */ poptr->childmsg.cmd = malloc(strlen(cmd) + 15); strcpy(poptr->childmsg.cmd,"failat 9999\n"); strcat(poptr->childmsg.cmd,cmd); /* Create a port that we can get the child's exit status through */ poptr->childmsg.POm.mn_ReplyPort = CreateMsgPort(); poptr->childmsg.POm.mn_Node.ln_Type = NT_MESSAGE; poptr->childmsg.POm.mn_Node.ln_Pri = 0; if (poptr->childmsg.POm.mn_ReplyPort == 0) { fprintf(stderr,"popen: Couldn't create message port\n"); errno = ENOMEM; return(NULL); } /* Now we can start the new process. NOTE: this is actually going to create a process consisting ONLY of the function "childprocess" which can be seen below. childprocess() then runs the command passed in the startup message. */ child = CreateNewProcTags( NP_Entry, (Tag) childprocess, NP_Input, Binfh, NP_Output, Boutfh, NP_CloseInput, closeinp, NP_CloseOutput, closeoutp, NP_StackSize, stacksize, NP_Cli, TRUE, TAG_DONE ); poptr->childmsg.DOSBase = (struct Library *)DOSBase; /* now pass the child the startup message */ PutMsg(&child->pr_MsgPort,(struct Message *) &poptr->childmsg); /* Now open our side of the pipe */ poptr->fptr = fopen(pname,mode); if (poptr->fptr == NULL) { fprintf(stderr,"popen: Unable to open pipe file %s\n",pname); DeleteMsgPort(poptr->childmsg.POm.mn_ReplyPort); return(NULL); } return(poptr->fptr); ILE *popenl(const char *arg0, ...) va_list ap; char argbuf[512], *mode; strcpy(argbuf, arg0); va_start(ap, arg0); while(1) { char *s = va_arg(ap, char *); if(s == NULL) { strcat(argbuf, "\n"); break; } /* if */ strcat(argbuf, " "); if(strchr(s, ' ')) { strcat(argbuf, "\""); strcat(argbuf, s); strcat(argbuf, "\""); } else { strcat(argbuf, s); } /* if */ } mode = va_arg(ap, char *); va_end(ap); return(popen(argbuf, mode)); /* popenl */ nt pclose(FILE *fptr) short i; /* Figure out which pipe we used for this file */ for (i=0; i<MAXPIPES; i++) if (poarray[i].fptr == fptr) break; if (i >= MAXPIPES) { fprintf(stderr,"popen: DISASTER...couldn't find file pointer in pclose \n"); exit(1); } /* close the file */ fclose(fptr); /* now wait for the exit status */ WaitPort(poarray[i].childmsg.POm.mn_ReplyPort); poarray[i].fptr = NULL; /* clean things up */ DeletePort(poarray[i].childmsg.POm.mn_ReplyPort); free(poarray[i].childmsg.cmd); return(poarray[i].childmsg.rc); * SAS/C autoinitialization for cleanup! */ oid __stdargs _STD_4000_popen(void) short i; /* Close all the open pipes! */ for(i=0; i<MAXPIPES; i++) { if(poarray[i].fptr) { pclose(poarray[i].fptr); } /* if */ } /* for */ /* _STD_4000_popen */ ifdef NOTDEF har *mktemp(char * template) register char *cp; register unsigned long val; cp = template; cp += strlen(cp); for (val = (unsigned long) FindTask(0L) ; ; ) if (*--cp == 'X') { *cp = val%10 + '0'; val /= 10; } else if (*cp != '.') break; if (*++cp != 0) { *cp = 'A'; while (access(template, 0) == 0) { if (*cp == 'Z') { *template = 0; break; } ++*cp; } } else { if (access(template, 0) == 0) *template = 0; } return template; endif * WATCH OUT! This only works without __saveds because of the special SAS/C 6.1 tricks I use! Check the output with omd! */ tatic int __interrupt childprocess(void) struct ExecBase *SysBase = *((struct ExecBase **)4); struct Library *DOSBase; struct Process *me; struct POmsg *startupmsg; int i = RETURN_FAIL; /* find our process structure */ me = (struct Process *) FindTask(NULL); /* Wait for the parent to kick us off */ WaitPort(&me->pr_MsgPort); /* Get the command to execute */ startupmsg = (struct POmsg *) GetMsg(&me->pr_MsgPort); DOSBase = startupmsg->DOSBase; if(DOSBase) { /* Now run the command. stdin and stdout are already set up */ i = SystemTags(startupmsg->cmd, SYS_UserShell, 1, TAG_DONE); } /* if */ if(i > 0) { /* UNIX compatibility ... */ i <<= 8; } /* if */ startupmsg->rc = i; /* pass the exit code back to the parent */ ReplyMsg((struct Message *) startupmsg); return(0); net.lib/PrintNetFault net.lib/PrintNetFault NAME PrintNetFault - socket error messages SYNOPSIS PrintNetFault(code, banner) void PrintNetFault(LONG, const UBYTE *) FUNCTION The PrintNetFault() function finds the error message corresponding to the code and writes it, followed by a newline, to the standard error or Output() filehandle. If the argument string is non-NULL it is preappended to the message string and separated from it by a colon and space (`: '). If string is NULL only the error message string is printed. NOTES The PrintNetFault() function uses the DOS IO functions. SEE ALSO strerror(), perror(), <netinclude:sys/errno.h> net.lib/PrintUserFault net.lib/PrintUserFault NAME PrintUserFault - socket error messages SYNOPSIS PrintUserFault(code, banner) void PrintUserFault(LONG, const UBYTE *) FUNCTION The PrintUserFault() function finds the error message corresponding to the code and writes it, followed by a newline, to the standard error or Output() filehandle. If the argument string is non-NULL it is preappended to the message string and separated from it by a colon and space (`: '). If string is NULL only the error message string is printed. NOTES The PrintUserFault() function used the DOS io functions. It is recommended to use PrintUserFault() when the standard C IO functions are not otherwise in use. SEE ALSO strerror(), perror(), <netinclude:sys/errno.h> net.lib/rcmd net.lib/rcmd NAME rcmd, rresvport - routines for returning a stream to a remote command SYNOPSIS #include <clib/socket_protos.h> int rcmd(char **ahost, int inport, const char *locuser, const char *remuser, const char *cmd, int *fd2p); int rresvport(int *port); FUNCTION The rcmd() function is used by the super-user to execute a command on a remote machine using an authentication scheme based on reserved port numbers. The rresvport() function returns a descriptor to a socket with an address in the privileged port space. Both functions are present in the same file and are used by the rsh command (among others). The rcmd() function looks up the host *ahost using gethostbyname(), returning -1 if the host does not exist. Otherwise *ahost is set to the standard name of the host and a connection is established to a server residing at the well-known Internet port inport. If the connection succeeds, a socket in the Internet domain of type SOCK_STREAM is returned to the caller, and given to the remote command as stdin and stdout. If fd2p is non-zero, then an auxiliary channel to a control process will be set up, and a descriptor for it will be placed in *fd2p. The control process will return diagnostic output from the command (unit 2) on this channel, and will also accept bytes on this channel as being UNIX signal numbers, to be forwarded to the process group of the command. If fd2p is 0, then the stderr (unit 2 of the remote command) will be made the same as the stdout and no provision is made for sending arbitrary signals to the remote process, although you may be able to get its attention by using out-of-band data. The protocol is described in detail in netutil/rshd. The rresvport() function is used to obtain a socket with a privileged address bound to it. This socket is suitable for use by rcmd() and several other functions. Privileged Internet ports are those in the range 0 to 1023. Only the super-user is allowed to bind an address of this sort to a socket. DIAGNOSTICS The rcmd() function returns a valid socket descriptor on success. It returns -1 on error and prints a diagnostic message on the standard error. The rresvport() function returns a valid, bound socket descriptor on success. It returns -1 on error with the global value errno set according to the reason for failure. The error code EAGAIN is overloaded to mean `All network ports in use.' SEE ALSO netutil/rlogin, netutil/rsh, rexec(), netutil/rexecd, netutil/rlogind, netutil/rshd net.lib/serveraccept net.lib/serveraccept NAME serveraccept - Accept a server connection on named port SYNOPSIS socket = serveraccept(name, peer); long serveraccept(char *, struct sockaddr_in *); DESCRIPTION The serveraccept() library call binds a socket to the named Internet TCP port. Then it listens the socket and accepts the connection to the port. The peer's socket address is returned in sockaddr pointed by sockaddr argument. The port name is resolved by getservbyname() call. A numeric value for port name is also accepted. This module is meant for daemon developing. INPUTS name - port name or numeric string. peer - pointer to struct sockaddr_in RESULT socket - positive socket id for success or -1 for failure. peer - sockaddr_in structure containing peer's internet address. Note that on error, the structure containing peer address is not necessarily updated. AUTHOR Pekka Pessi, the AmiTCP/IP Group, <amitcp-group@hut.fi>, Helsinki University of Technology, Finland. SEE ALSO bsdsocket/accept, bsdsocket/getservbyname net.lib/set_socket_stdio net.lib/set_socket_stdio NAME set_socket_stdio - redirect stdio to/from a socket SYNOPSIS int set_socket_stdio(int sock); FUNCTION Redirect stdio (stdin, stdout and stderr) to/from socket 'sock'. This is done by dup2()'ing 'sock' to the level 1 files underneath the stdin, stdout and stderr. The original 'sock' reference is closed on successful return, so the socket descriptor given as argument should not be used after this function returns (successfully). RETURN VALUES 0 if successful, -1 on error. Global variable 'errno' contains the specific error code set by the failing function. NOTES This module pulls in the link library stdio modules. AUTHOR Jarno Rajahalme, the AmiTCP/IP Group <amitcp-group@hut.fi>, Helsinki University of Technology, Finland. SEE ALSO dup2() net.lib/sleep net.lib/sleep NAME sleep - suspend process execution for the specified time SYNOPSIS void sleep(unsigned int seconds); FUNCTION Process execution is suspended for number of seconds specified in 'seconds'. The sleep will be aborted if any of the break signals specified for the process is received (only CTRL-C by default). PORTABILITY UNIX INPUTS 'seconds' - number of seconds to sleep. RESULT Does not return a value. NOTES The sleep is implemented as a single select() call with all other than time out argument as NULL. SEE ALSO bsdsocket.library/select() net.lib/stat net.lib/stat NAME stat, lstat, fstat - get file status SYNOPSIS #include <sys/types.h> #include <sys/stat.h> success = stat(path, buf) int stat(const char *, struct stat *); success = lstat(path, buf); int lstat(const char *, struct stat *); success = fstat(fd, buf); int fstat(int, struct stat *); DESCRIPTION The stat() function obtains information about the file pointed to by path. Read, write or execute permission of the named file is not required, but all directories listed in the path name leading to the file must be seachable. Lstat() is like stat() except in the case where the named file is a symbolic link, in which case lstat() returns information about the link, while stat() returns information about the file the link references. The fstat() obtains the same information about an open file known by the file descriptor fd, such as would be obtained by an open call. Buf is a pointer to a stat() structure as defined by <sys/stat.h> (shown below) and into which information is placed concerning the file. struct stat { dev_t st_dev; /* unique device id */ ino_t st_ino; /* inode of file (key block) */ mode_t st_mode; /* Unix style mode */ ushort st_nlink; /* number of links (unimplemented) */ uid_t st_uid; /* owner's user ID */ gid_t st_gid; /* owner's group ID */ dev_t st_rdev; /* special file ID (unimplemented) */ off_t st_size; /* file size */ time_t st_atime; /* Time of last access */ time_t st_mtime; /* Last modification time */ time_t st_ctime; /* Last file status change time */ long st_blksize; /* Size of disk block */ long st_blocks; /* Size in blocks */ long st_dosmode; /* DOS protection bits */ short st_type; /* DOS file type */ char *st_comment; /* DOS file comment */ }; The time-related fields of struct stat have same contents, time when file data last modified. The status information word st_mode has bits as follows: #define S_ISUID 0004000 /* set user id on execution */ #define S_ISGID 0002000 /* set group id on execution */ #define S_ISVTX 0001000 /* save swapped text even after use */ #define S_IRUSR 0000400 /* read permission for owner */ #define S_IWUSR 0000200 /* write permission for owner */ #define S_IXUSR 0000100 /* execute permission for owner */ #define S_IRGRP 0000040 /* read permission for group */ #define S_IWGRP 0000020 /* write permission for group */ #define S_IXGRP 0000010 /* execute permission for group */ #define S_IROTH 0000004 /* read permission for other */ #define S_IWOTH 0000002 /* write permission for other */ #define S_IXOTH 0000001 /* execute permission for other */ #define S_IFCHR 0020000 /* character special */ #define S_IFDIR 0040000 /* directory */ #define S_IFBLK 0060000 /* block special */ #define S_IFREG 0100000 /* regular */ #define S_IFLNK 0120000 /* symbolic link */ #define S_IFSOCK 0140000 /* socket */ #define S_IFIFO 0010000 /* named pipe (fifo) */ For a list of access modes, see <sys/stat.h>, access(2) and chmod(2). RETURN VALUES Upon successful completion a value of 0 is returned. Otherwise, a value of -1 is returned and errno is set to indicate the error. ERRORS The functions stat() and lstat() will fail if: [ENOTDIR] A component of the path prefix is not a directory. [ENAMETOOLONG] A component of a pathname exceeded 255 characters, or an entire path name exceeded 1023 characters. [ENOENT] The named file does not exist. [ELOOP] Too many symbolic links were encountered in translating the pathname. [EACCES] Search permission is denied for a component of the path prefix. [EFAULT] Buf or name points to an invalid address. [EIO] An I/O error occurred while reading from or writing to the file system. The function fstat() will fail if: [EBADF] fd is not a valid open file descriptor. [EFAULT] Buf points to an invalid address. [EIO] An I/O error occurred while reading from or writing to the file system. SEE ALSO chmod(), chown() BUGS Applying fstat to a socket returns a zero'd buffer. net.lib/strerror net.lib/strerror NAME strerror -- return the text for given error number SYNOPSIS string = strerror(error); char * strerror(int); FUNCTION This function returns pointer to the (English) string describing the error code given as argument. The error strings are defined for the error codes defined in <sys/errno.h>. NOTES The string pointed to by the return value should not be modified by the program, but may be overwritten by a subsequent call to this function. BUGS The strerror() prototype should be const char *strerror(unsigned int); However, the SAS C includes define it differently. SEE ALSO <netinclude:sys/errno.h>, perror(), PrintNetFault() net.lib/syslog net.lib/syslog NAME openlog(), closelog(), setlogmask() -- syslog utility functions SYNOPSIS #include <syslog.h> openlog(ident, logopt, facility); void openlog(const char *, int, int); closelog(); void closelog(void); oldmask = setlogmask(maskpri); int setlogmask(int); FUNCTION openlog() can be called to initialize the log file, if special processing is needed. ident is a string that precedes every message. logopt is a mask of bits, logically OR'ed together, indicating logging options. The values for logopt are: LOG_PID Log the process ID with each message; useful for identifying instantiations of daemons. LOG_CONS Force writing messages to the console if unable to send it to syslogd. This option is safe to use in daemon processes that have no controlling terminal because syslog() forks before opening the console. LOG_NDELAY Open the connection to syslogd immediately. Normally, the open is delayed until the first message is logged. This is useful for programs that need to manage the order in which file descriptors are allocated. LOG_NOWAIT Do not wait for children forked to log messages on the console. Obsolete in AmiTCP/IP, since AmiTCP/IP does not fork. facility encodes a default facility to be assigned to all messages written subsequently by syslog() with no explicit facility encoded. The facility codes are: LOG_KERN Messages generated by the kernel. These cannot be generated by any user processes. LOG_USER Messages generated by random user processes. This is the default facility identifier if none is specified. LOG_MAIL The mail system. LOG_DAEMON System daemons, such as inetd, ftpd, etc. LOG_AUTH The authorization system: login, su, getty, etc. LOG_LPR The line printer spooling system: lp, lpsched, etc. LOG_LOCAL0 Reserved for local use. Similarly for LOG_LOCAL1 through LOG_LOCAL7. closelog() closes the log file. setlogmask() sets the log priority mask to maskpri and returns the previous mask. Calls to syslog() with a priority not set in maskpri are rejected. The mask for an individual priority pri is calculated by the macro LOG_MASK(pri); the mask for all priorities up to and including toppri is given by the macro LOG_UPTO(toppri). By default, all priorities are logged. EXAMPLES who logs a message regarding some sort of unexpected and serious error: syslog(LOG_ALERT, "who: internal error 23"); ftpd uses openlog() to arrange to log its process ID, to log to the console if necessary, and to log in the name of the daemon facility: openlog("ftpd", LOG_PID|LOG_CONS, LOG_DAEMON); Arrange to log messages only at levels LOG_ERR and lower: setlogmask(LOG_UPTO(LOG_ERR)); Typical usage of syslog() to log a connection: syslog(LOG_INFO, "Connection from host %d", CallingHost); If the facility has not been set with openlog(), it defaults to LOG_USER. Explicitly set the facility for this message: syslog(LOG_INFO|LOG_LOCAL2, "foobar error: %m"); NOTES openlog() does not copy and store the ident string internally; it stores only the character pointer. Therefore it is the responsibility of the programmer to make sure that the ident argument points to the correct string while syslog() is being called. BUGS Most of the logopt and facility codes are currently being ignored by AmiTCP/IP, but they should be used for future compatibility. The autoinit module of the net.lib tells the program name to the AmiTCP/IP at program startup, so use of the openlog() for that purpose only is not necessary. AUTHOR syslog() was developed by the University of California, Berkeley. SEE ALSO bsdsocket.library/syslog(), bsdsocket.library/SocketBaseTagList() net.lib/usleep net.lib/usleep NAME usleep - suspend process execution for the specified time SYNOPSIS void usleep(unsigned int microseconds); FUNCTION Process execution is suspended for number of microseconds specified in 'microseconds'. The sleep will be aborted if any of the break signals specified for the process is received (only CTRL-C by default). PORTABILITY UNIX INPUTS 'microseconds' - number of microseconds to sleep. RESULT Does not return a value. NOTES The sleep is implemented as a single select() call with all other than time out argument as NULL. SEE ALSO bsdsocket.library/select() net.lib/utime net.lib/utime NAME utime - set file access and modification times SYNOPSIS #include <utime.h> int error = utime(const char *name, const struct utimbuf *times) FUNCTION The access and modification times for the file 'name' are modified according to the 'times'. If 'times' is NULL, the times are set to systems current time. PORTABILITY UNIX INPUTS 'name' - the name of the file to be affected. 'times' - pointer to a structure containing the time values, defined in <utime.h> as: struct utimbuf { time_t actime; /* Access time */ time_t modtime; /* Modification time */ }; Both times are in units of seconds since Jan. 1, 1970, Greenwich Mean Time. If the 'times' is given as the NULL pointer, the current time is used. RESULT Returns 0 when successful and -1 with specific error code in errno in case of an error. NOTES Since AmigaDOS files have only one time stamp, both access and modification times cannot be supported. Since the AmigaDOS file date is the modification time, only the 'modtime' field of the 'times' is used. The conversion from 1.1.1970 based GMT to 1.1.1978 based local time is done with external long __local_to_GMT, which is defined and initialized by the timerinit.c module included in the net.lib. SEE ALSO dos.library/DateStamp(), dos.library/SetFileDate(), net.lib/timerinit