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- /*
- * tclWinPipe.c --
- *
- * This file implements the Windows-specific exec pipeline functions,
- * the "pipe" channel driver, and the "pid" Tcl command.
- *
- * Copyright (c) 1996-1997 by Sun Microsystems, Inc.
- *
- * See the file "license.terms" for information on usage and redistribution
- * of this file, and for a DISCLAIMER OF ALL WARRANTIES.
- *
- * SCCS: @(#) tclWinPipe.c 1.44 97/08/05 11:46:12
- */
-
- #include "tclWinInt.h"
-
- #include <dos.h>
- #include <fcntl.h>
- #include <io.h>
- #include <sys/stat.h>
-
- /*
- * The following variable is used to tell whether this module has been
- * initialized.
- */
-
- static int initialized = 0;
-
- /*
- * The following defines identify the various types of applications that
- * run under windows. There is special case code for the various types.
- */
-
- #define APPL_NONE 0
- #define APPL_DOS 1
- #define APPL_WIN3X 2
- #define APPL_WIN32 3
-
- /*
- * The following constants and structures are used to encapsulate the state
- * of various types of files used in a pipeline.
- */
-
- #define WIN32S_PIPE 1 /* Win32s emulated pipe. */
- #define WIN32S_TMPFILE 2 /* Win32s emulated temporary file. */
- #define WIN_FILE 3 /* Basic Win32 file. */
-
- /*
- * This structure encapsulates the common state associated with all file
- * types used in a pipeline.
- */
-
- typedef struct WinFile {
- int type; /* One of the file types defined above. */
- HANDLE handle; /* Open file handle. */
- } WinFile;
-
- /*
- * The following structure is used to keep track of temporary files under
- * Win32s and delete the disk file when the open handle is closed.
- * The type field will be WIN32S_TMPFILE.
- */
-
- typedef struct TmpFile {
- WinFile file; /* Common part. */
- char name[MAX_PATH]; /* Name of temp file. */
- } TmpFile;
-
- /*
- * The following structure represents a synchronous pipe under Win32s.
- * The type field will be WIN32S_PIPE. The handle field will refer to
- * an open file when Tcl is reading from the "pipe", otherwise it is
- * INVALID_HANDLE_VALUE.
- */
-
- typedef struct WinPipe {
- WinFile file; /* Common part. */
- struct WinPipe *otherPtr; /* Pointer to the WinPipe structure that
- * corresponds to the other end of this
- * pipe. */
- char *fileName; /* The name of the staging file that gets
- * the data written to this pipe. Malloc'd.
- * and shared by both ends of the pipe. Only
- * when both ends are freed will fileName be
- * freed and the file it refers to deleted. */
- } WinPipe;
-
- /*
- * This list is used to map from pids to process handles.
- */
-
- typedef struct ProcInfo {
- HANDLE hProcess;
- DWORD dwProcessId;
- struct ProcInfo *nextPtr;
- } ProcInfo;
-
- static ProcInfo *procList;
-
- /*
- * State flags used in the PipeInfo structure below.
- */
-
- #define PIPE_PENDING (1<<0) /* Message is pending in the queue. */
- #define PIPE_ASYNC (1<<1) /* Channel is non-blocking. */
-
- /*
- * This structure describes per-instance data for a pipe based channel.
- */
-
- typedef struct PipeInfo {
- Tcl_Channel channel; /* Pointer to channel structure. */
- int validMask; /* OR'ed combination of TCL_READABLE,
- * TCL_WRITABLE, or TCL_EXCEPTION: indicates
- * which operations are valid on the file. */
- int watchMask; /* OR'ed combination of TCL_READABLE,
- * TCL_WRITABLE, or TCL_EXCEPTION: indicates
- * which events should be reported. */
- int flags; /* State flags, see above for a list. */
- TclFile readFile; /* Output from pipe. */
- TclFile writeFile; /* Input from pipe. */
- TclFile errorFile; /* Error output from pipe. */
- int numPids; /* Number of processes attached to pipe. */
- Tcl_Pid *pidPtr; /* Pids of attached processes. */
- struct PipeInfo *nextPtr; /* Pointer to next registered pipe. */
- } PipeInfo;
-
- /*
- * The following pointer refers to the head of the list of pipes
- * that are being watched for file events.
- */
-
- static PipeInfo *firstPipePtr;
-
- /*
- * The following structure is what is added to the Tcl event queue when
- * pipe events are generated.
- */
-
- typedef struct PipeEvent {
- Tcl_Event header; /* Information that is standard for
- * all events. */
- PipeInfo *infoPtr; /* Pointer to pipe info structure. Note
- * that we still have to verify that the
- * pipe exists before dereferencing this
- * pointer. */
- } PipeEvent;
-
- /*
- * Declarations for functions used only in this file.
- */
-
- static int ApplicationType(Tcl_Interp *interp, const char *fileName,
- char *fullName);
- static void BuildCommandLine(int argc, char **argv, Tcl_DString *linePtr);
- static void CopyChannel(HANDLE dst, HANDLE src);
- static BOOL HasConsole(void);
- static TclFile MakeFile(HANDLE handle);
- static char * MakeTempFile(Tcl_DString *namePtr);
- static int PipeBlockModeProc(ClientData instanceData, int mode);
- static void PipeCheckProc _ANSI_ARGS_((ClientData clientData,
- int flags));
- static int PipeCloseProc(ClientData instanceData, Tcl_Interp *interp);
- static int PipeEventProc(Tcl_Event *evPtr, int flags);
- static void PipeExitHandler(ClientData clientData);
- static int PipeGetHandleProc(ClientData instanceData, int direction,
- ClientData *handlePtr);
- static void PipeInit(void);
- static int PipeInputProc(ClientData instanceData, char *buf, int toRead,
- int *errorCode);
- static int PipeOutputProc(ClientData instanceData, char *buf, int toWrite,
- int *errorCode);
- static void PipeWatchProc(ClientData instanceData, int mask);
- static void PipeSetupProc _ANSI_ARGS_((ClientData clientData,
- int flags));
-
- /*
- * This structure describes the channel type structure for command pipe
- * based IO.
- */
-
- static Tcl_ChannelType pipeChannelType = {
- "pipe", /* Type name. */
- PipeBlockModeProc, /* Set blocking or non-blocking mode.*/
- PipeCloseProc, /* Close proc. */
- PipeInputProc, /* Input proc. */
- PipeOutputProc, /* Output proc. */
- NULL, /* Seek proc. */
- NULL, /* Set option proc. */
- NULL, /* Get option proc. */
- PipeWatchProc, /* Set up notifier to watch the channel. */
- PipeGetHandleProc, /* Get an OS handle from channel. */
- };
-
- /*
- *----------------------------------------------------------------------
- *
- * PipeInit --
- *
- * This function initializes the static variables for this file.
- *
- * Results:
- * None.
- *
- * Side effects:
- * Creates a new event source.
- *
- *----------------------------------------------------------------------
- */
-
- static void
- PipeInit()
- {
- initialized = 1;
- firstPipePtr = NULL;
- procList = NULL;
- Tcl_CreateEventSource(PipeSetupProc, PipeCheckProc, NULL);
- Tcl_CreateExitHandler(PipeExitHandler, NULL);
- }
-
- /*
- *----------------------------------------------------------------------
- *
- * PipeExitHandler --
- *
- * This function is called to cleanup the pipe module before
- * Tcl is unloaded.
- *
- * Results:
- * None.
- *
- * Side effects:
- * Removes the pipe event source.
- *
- *----------------------------------------------------------------------
- */
-
- static void
- PipeExitHandler(clientData)
- ClientData clientData; /* Old window proc */
- {
- Tcl_DeleteEventSource(PipeSetupProc, PipeCheckProc, NULL);
- initialized = 0;
- }
-
- /*
- *----------------------------------------------------------------------
- *
- * PipeSetupProc --
- *
- * This procedure is invoked before Tcl_DoOneEvent blocks waiting
- * for an event.
- *
- * Results:
- * None.
- *
- * Side effects:
- * Adjusts the block time if needed.
- *
- *----------------------------------------------------------------------
- */
-
- void
- PipeSetupProc(data, flags)
- ClientData data; /* Not used. */
- int flags; /* Event flags as passed to Tcl_DoOneEvent. */
- {
- PipeInfo *infoPtr;
- Tcl_Time blockTime = { 0, 0 };
-
- if (!(flags & TCL_FILE_EVENTS)) {
- return;
- }
-
- /*
- * Check to see if there is a watched pipe. If so, poll.
- */
-
- for (infoPtr = firstPipePtr; infoPtr != NULL; infoPtr = infoPtr->nextPtr) {
- if (infoPtr->watchMask) {
- Tcl_SetMaxBlockTime(&blockTime);
- break;
- }
- }
- }
-
- /*
- *----------------------------------------------------------------------
- *
- * PipeCheckProc --
- *
- * This procedure is called by Tcl_DoOneEvent to check the pipe
- * event source for events.
- *
- * Results:
- * None.
- *
- * Side effects:
- * May queue an event.
- *
- *----------------------------------------------------------------------
- */
-
- static void
- PipeCheckProc(data, flags)
- ClientData data; /* Not used. */
- int flags; /* Event flags as passed to Tcl_DoOneEvent. */
- {
- PipeInfo *infoPtr;
- PipeEvent *evPtr;
-
- if (!(flags & TCL_FILE_EVENTS)) {
- return;
- }
-
- /*
- * Queue events for any watched pipes that don't already have events
- * queued.
- */
-
- for (infoPtr = firstPipePtr; infoPtr != NULL; infoPtr = infoPtr->nextPtr) {
- if (infoPtr->watchMask && !(infoPtr->flags & PIPE_PENDING)) {
- infoPtr->flags |= PIPE_PENDING;
- evPtr = (PipeEvent *) ckalloc(sizeof(PipeEvent));
- evPtr->header.proc = PipeEventProc;
- evPtr->infoPtr = infoPtr;
- Tcl_QueueEvent((Tcl_Event *) evPtr, TCL_QUEUE_TAIL);
- }
- }
- }
-
- /*
- *----------------------------------------------------------------------
- *
- * MakeFile --
- *
- * This function constructs a new TclFile from a given data and
- * type value.
- *
- * Results:
- * Returns a newly allocated WinFile as a TclFile.
- *
- * Side effects:
- * None.
- *
- *----------------------------------------------------------------------
- */
-
- static TclFile
- MakeFile(handle)
- HANDLE handle; /* Type-specific data. */
- {
- WinFile *filePtr;
-
- filePtr = (WinFile *) ckalloc(sizeof(WinFile));
- filePtr->type = WIN_FILE;
- filePtr->handle = handle;
-
- return (TclFile)filePtr;
- }
-
- /*
- *----------------------------------------------------------------------
- *
- * TclpMakeFile --
- *
- * Make a TclFile from a channel.
- *
- * Results:
- * Returns a new TclFile or NULL on failure.
- *
- * Side effects:
- * None.
- *
- *----------------------------------------------------------------------
- */
-
- TclFile
- TclpMakeFile(channel, direction)
- Tcl_Channel channel; /* Channel to get file from. */
- int direction; /* Either TCL_READABLE or TCL_WRITABLE. */
- {
- HANDLE handle;
-
- if (Tcl_GetChannelHandle(channel, direction,
- (ClientData *) &handle) == TCL_OK) {
- return MakeFile(handle);
- } else {
- return (TclFile) NULL;
- }
- }
-
- /*
- *----------------------------------------------------------------------
- *
- * TclpCreateTempFile --
- *
- * This function opens a unique file with the property that it
- * will be deleted when its file handle is closed. The temporary
- * file is created in the system temporary directory.
- *
- * Results:
- * Returns a valid TclFile, or NULL on failure.
- *
- * Side effects:
- * Creates a new temporary file.
- *
- *----------------------------------------------------------------------
- */
-
- TclFile
- TclpCreateTempFile(contents, namePtr)
- char *contents; /* String to write into temp file, or NULL. */
- Tcl_DString *namePtr; /* If non-NULL, pointer to initialized
- * DString that is filled with the name of
- * the temp file that was created. */
- {
- char name[MAX_PATH];
- HANDLE handle;
-
- if ((GetTempPath(MAX_PATH, name) == 0) ||
- (GetTempFileName(name, "TCL", 0, name) == 0)) {
- return NULL;
- }
-
- handle = CreateFile(name, GENERIC_READ | GENERIC_WRITE, 0, NULL,
- CREATE_ALWAYS, FILE_ATTRIBUTE_TEMPORARY|FILE_FLAG_DELETE_ON_CLOSE,
- NULL);
- if (handle == INVALID_HANDLE_VALUE) {
- goto error;
- }
-
- /*
- * Write the file out, doing line translations on the way.
- */
-
- if (contents != NULL) {
- DWORD result, length;
- char *p;
-
- for (p = contents; *p != '\0'; p++) {
- if (*p == '\n') {
- length = p - contents;
- if (length > 0) {
- if (!WriteFile(handle, contents, length, &result, NULL)) {
- goto error;
- }
- }
- if (!WriteFile(handle, "\r\n", 2, &result, NULL)) {
- goto error;
- }
- contents = p+1;
- }
- }
- length = p - contents;
- if (length > 0) {
- if (!WriteFile(handle, contents, length, &result, NULL)) {
- goto error;
- }
- }
- }
-
- if (SetFilePointer(handle, 0, NULL, FILE_BEGIN) == 0xFFFFFFFF) {
- goto error;
- }
-
- if (namePtr != NULL) {
- Tcl_DStringAppend(namePtr, name, -1);
- }
-
- /*
- * Under Win32s a file created with FILE_FLAG_DELETE_ON_CLOSE won't
- * actually be deleted when it is closed, so we have to do it ourselves.
- */
-
- if (TclWinGetPlatformId() == VER_PLATFORM_WIN32s) {
- TmpFile *tmpFilePtr = (TmpFile *) ckalloc(sizeof(TmpFile));
- tmpFilePtr->file.type = WIN32S_TMPFILE;
- tmpFilePtr->file.handle = handle;
- strcpy(tmpFilePtr->name, name);
- return (TclFile)tmpFilePtr;
- } else {
- return MakeFile(handle);
- }
-
- error:
- TclWinConvertError(GetLastError());
- CloseHandle(handle);
- DeleteFile(name);
- return NULL;
- }
-
- /*
- *----------------------------------------------------------------------
- *
- * TclpOpenFile --
- *
- * This function opens files for use in a pipeline.
- *
- * Results:
- * Returns a newly allocated TclFile structure containing the
- * file handle.
- *
- * Side effects:
- * None.
- *
- *----------------------------------------------------------------------
- */
-
- TclFile
- TclpOpenFile(path, mode)
- char *path;
- int mode;
- {
- HANDLE handle;
- DWORD accessMode, createMode, shareMode, flags;
- SECURITY_ATTRIBUTES sec;
-
- /*
- * Map the access bits to the NT access mode.
- */
-
- switch (mode & (O_RDONLY | O_WRONLY | O_RDWR)) {
- case O_RDONLY:
- accessMode = GENERIC_READ;
- break;
- case O_WRONLY:
- accessMode = GENERIC_WRITE;
- break;
- case O_RDWR:
- accessMode = (GENERIC_READ | GENERIC_WRITE);
- break;
- default:
- TclWinConvertError(ERROR_INVALID_FUNCTION);
- return NULL;
- }
-
- /*
- * Map the creation flags to the NT create mode.
- */
-
- switch (mode & (O_CREAT | O_EXCL | O_TRUNC)) {
- case (O_CREAT | O_EXCL):
- case (O_CREAT | O_EXCL | O_TRUNC):
- createMode = CREATE_NEW;
- break;
- case (O_CREAT | O_TRUNC):
- createMode = CREATE_ALWAYS;
- break;
- case O_CREAT:
- createMode = OPEN_ALWAYS;
- break;
- case O_TRUNC:
- case (O_TRUNC | O_EXCL):
- createMode = TRUNCATE_EXISTING;
- break;
- default:
- createMode = OPEN_EXISTING;
- break;
- }
-
- /*
- * If the file is not being created, use the existing file attributes.
- */
-
- flags = 0;
- if (!(mode & O_CREAT)) {
- flags = GetFileAttributes(path);
- if (flags == 0xFFFFFFFF) {
- flags = 0;
- }
- }
-
- /*
- * Set up the security attributes so this file is not inherited by
- * child processes.
- */
-
- sec.nLength = sizeof(sec);
- sec.lpSecurityDescriptor = NULL;
- sec.bInheritHandle = 0;
-
- /*
- * Set up the file sharing mode. We want to allow simultaneous access.
- */
-
- shareMode = FILE_SHARE_READ | FILE_SHARE_WRITE;
-
- /*
- * Now we get to create the file.
- */
-
- handle = CreateFile(path, accessMode, shareMode, &sec, createMode, flags,
- (HANDLE) NULL);
- if (handle == INVALID_HANDLE_VALUE) {
- DWORD err = GetLastError();
- if ((err & 0xffffL) == ERROR_OPEN_FAILED) {
- err = (mode & O_CREAT) ? ERROR_FILE_EXISTS : ERROR_FILE_NOT_FOUND;
- }
- TclWinConvertError(err);
- return NULL;
- }
-
- /*
- * Seek to the end of file if we are writing.
- */
-
- if (mode & O_WRONLY) {
- SetFilePointer(handle, 0, NULL, FILE_END);
- }
-
- return MakeFile(handle);
- }
-
- /*
- *----------------------------------------------------------------------
- *
- * TclpCreatePipe --
- *
- * Creates an anonymous pipe. Under Win32s, creates a temp file
- * that is used to simulate a pipe.
- *
- * Results:
- * Returns 1 on success, 0 on failure.
- *
- * Side effects:
- * Creates a pipe.
- *
- *----------------------------------------------------------------------
- */
-
- int
- TclpCreatePipe(readPipe, writePipe)
- TclFile *readPipe; /* Location to store file handle for
- * read side of pipe. */
- TclFile *writePipe; /* Location to store file handle for
- * write side of pipe. */
- {
- HANDLE readHandle, writeHandle;
-
- if (CreatePipe(&readHandle, &writeHandle, NULL, 0) != 0) {
- *readPipe = MakeFile(readHandle);
- *writePipe = MakeFile(writeHandle);
- return 1;
- }
-
- if (TclWinGetPlatformId() == VER_PLATFORM_WIN32s) {
- WinPipe *readPipePtr, *writePipePtr;
- char buf[MAX_PATH];
-
- if ((GetTempPath(MAX_PATH, buf) != 0)
- && (GetTempFileName(buf, "TCL", 0, buf) != 0)) {
-
- readPipePtr = (WinPipe *) ckalloc(sizeof(WinPipe));
- writePipePtr = (WinPipe *) ckalloc(sizeof(WinPipe));
-
- readPipePtr->file.type = WIN32S_PIPE;
- readPipePtr->otherPtr = writePipePtr;
- readPipePtr->fileName = strcpy(ckalloc(strlen(buf) + 1), buf);
- readPipePtr->file.handle = INVALID_HANDLE_VALUE;
- writePipePtr->file.type = WIN32S_PIPE;
- writePipePtr->otherPtr = readPipePtr;
- writePipePtr->fileName = readPipePtr->fileName;
- writePipePtr->file.handle = INVALID_HANDLE_VALUE;
-
- *readPipe = (TclFile)readPipePtr;
- *writePipe = (TclFile)writePipePtr;
-
- return 1;
- }
- }
-
- TclWinConvertError(GetLastError());
- return 0;
- }
-
- /*
- *----------------------------------------------------------------------
- *
- * TclpCloseFile --
- *
- * Closes a pipeline file handle. These handles are created by
- * TclpOpenFile, TclpCreatePipe, or TclpMakeFile.
- *
- * Results:
- * 0 on success, -1 on failure.
- *
- * Side effects:
- * The file is closed and deallocated.
- *
- *----------------------------------------------------------------------
- */
-
- int
- TclpCloseFile(file)
- TclFile file; /* The file to close. */
- {
- WinFile *filePtr = (WinFile *) file;
- WinPipe *pipePtr;
-
- switch (filePtr->type) {
- case WIN_FILE:
- case WIN32S_TMPFILE:
- if (CloseHandle(filePtr->handle) == FALSE) {
- TclWinConvertError(GetLastError());
- ckfree((char *) filePtr);
- return -1;
- }
- /*
- * Simulate deleting the file on close for Win32s.
- */
-
- if (filePtr->type == WIN32S_TMPFILE) {
- DeleteFile(((TmpFile*)filePtr)->name);
- }
- break;
-
- case WIN32S_PIPE:
- pipePtr = (WinPipe *) file;
-
- if (pipePtr->otherPtr != NULL) {
- pipePtr->otherPtr->otherPtr = NULL;
- } else {
- if (pipePtr->file.handle != INVALID_HANDLE_VALUE) {
- CloseHandle(pipePtr->file.handle);
- }
- DeleteFile(pipePtr->fileName);
- ckfree((char *) pipePtr->fileName);
- }
- break;
-
- default:
- panic("Tcl_CloseFile: unexpected file type");
- }
-
- ckfree((char *) filePtr);
- return 0;
- }
-
- /*
- *--------------------------------------------------------------------------
- *
- * TclpGetPid --
- *
- * Given a HANDLE to a child process, return the process id for that
- * child process.
- *
- * Results:
- * Returns the process id for the child process. If the pid was not
- * known by Tcl, either because the pid was not created by Tcl or the
- * child process has already been reaped, -1 is returned.
- *
- * Side effects:
- * None.
- *
- *--------------------------------------------------------------------------
- */
-
- unsigned long
- TclpGetPid(pid)
- Tcl_Pid pid; /* The HANDLE of the child process. */
- {
- ProcInfo *infoPtr;
-
- for (infoPtr = procList; infoPtr != NULL; infoPtr = infoPtr->nextPtr) {
- if (infoPtr->hProcess == (HANDLE) pid) {
- return infoPtr->dwProcessId;
- }
- }
- return (unsigned long) -1;
- }
-
- /*
- *----------------------------------------------------------------------
- *
- * TclpCreateProcess --
- *
- * Create a child process that has the specified files as its
- * standard input, output, and error. The child process runs
- * synchronously under Win32s and asynchronously under Windows NT
- * and Windows 95, and runs with the same environment variables
- * as the creating process.
- *
- * The complete Windows search path is searched to find the specified
- * executable. If an executable by the given name is not found,
- * automatically tries appending ".com", ".exe", and ".bat" to the
- * executable name.
- *
- * Results:
- * The return value is TCL_ERROR and an error message is left in
- * interp->result if there was a problem creating the child
- * process. Otherwise, the return value is TCL_OK and *pidPtr is
- * filled with the process id of the child process.
- *
- * Side effects:
- * A process is created.
- *
- *----------------------------------------------------------------------
- */
-
- int
- TclpCreateProcess(interp, argc, argv, inputFile, outputFile, errorFile,
- pidPtr)
- Tcl_Interp *interp; /* Interpreter in which to leave errors that
- * occurred when creating the child process.
- * Error messages from the child process
- * itself are sent to errorFile. */
- int argc; /* Number of arguments in following array. */
- char **argv; /* Array of argument strings. argv[0]
- * contains the name of the executable
- * converted to native format (using the
- * Tcl_TranslateFileName call). Additional
- * arguments have not been converted. */
- TclFile inputFile; /* If non-NULL, gives the file to use as
- * input for the child process. If inputFile
- * file is not readable or is NULL, the child
- * will receive no standard input. */
- TclFile outputFile; /* If non-NULL, gives the file that
- * receives output from the child process. If
- * outputFile file is not writeable or is
- * NULL, output from the child will be
- * discarded. */
- TclFile errorFile; /* If non-NULL, gives the file that
- * receives errors from the child process. If
- * errorFile file is not writeable or is NULL,
- * errors from the child will be discarded.
- * errorFile may be the same as outputFile. */
- Tcl_Pid *pidPtr; /* If this procedure is successful, pidPtr
- * is filled with the process id of the child
- * process. */
- {
- int result, applType, createFlags;
- Tcl_DString cmdLine;
- STARTUPINFO startInfo;
- PROCESS_INFORMATION procInfo;
- SECURITY_ATTRIBUTES secAtts;
- HANDLE hProcess, h, inputHandle, outputHandle, errorHandle;
- char execPath[MAX_PATH];
- char *originalName;
- WinFile *filePtr;
-
- applType = ApplicationType(interp, argv[0], execPath);
- if (applType == APPL_NONE) {
- return TCL_ERROR;
- }
- originalName = argv[0];
- argv[0] = execPath;
-
- result = TCL_ERROR;
- Tcl_DStringInit(&cmdLine);
-
- if (TclWinGetPlatformId() == VER_PLATFORM_WIN32s) {
- /*
- * Under Win32s, there are no pipes. In order to simulate pipe
- * behavior, the child processes are run synchronously and their
- * I/O is redirected from/to temporary files before the next
- * stage of the pipeline is started.
- */
-
- MSG msg;
- DWORD status;
- DWORD args[4];
- void *trans[5];
- char *inputFileName, *outputFileName;
- Tcl_DString inputTempFile, outputTempFile;
-
- BuildCommandLine(argc, argv, &cmdLine);
-
- ZeroMemory(&startInfo, sizeof(startInfo));
- startInfo.cb = sizeof(startInfo);
-
- Tcl_DStringInit(&inputTempFile);
- Tcl_DStringInit(&outputTempFile);
- outputHandle = INVALID_HANDLE_VALUE;
-
- inputFileName = NULL;
- outputFileName = NULL;
- if (inputFile != NULL) {
- filePtr = (WinFile *) inputFile;
- switch (filePtr->type) {
- case WIN_FILE:
- case WIN32S_TMPFILE: {
- h = INVALID_HANDLE_VALUE;
- inputFileName = MakeTempFile(&inputTempFile);
- if (inputFileName != NULL) {
- h = CreateFile(inputFileName, GENERIC_WRITE, 0,
- NULL, CREATE_ALWAYS, 0, NULL);
- }
- if (h == INVALID_HANDLE_VALUE) {
- Tcl_AppendResult(interp, "couldn't duplicate input handle: ",
- Tcl_PosixError(interp), (char *) NULL);
- goto end32s;
- }
- CopyChannel(h, filePtr->handle);
- CloseHandle(h);
- break;
- }
- case WIN32S_PIPE: {
- inputFileName = ((WinPipe*)inputFile)->fileName;
- break;
- }
- }
- }
- if (inputFileName == NULL) {
- inputFileName = "nul";
- }
- if (outputFile != NULL) {
- filePtr = (WinFile *)outputFile;
- if (filePtr->type == WIN_FILE) {
- outputFileName = MakeTempFile(&outputTempFile);
- if (outputFileName == NULL) {
- Tcl_AppendResult(interp, "couldn't duplicate output handle: ",
- Tcl_PosixError(interp), (char *) NULL);
- goto end32s;
- }
- outputHandle = filePtr->handle;
- } else if (filePtr->type == WIN32S_PIPE) {
- outputFileName = ((WinPipe*)outputFile)->fileName;
- }
- }
- if (outputFileName == NULL) {
- outputFileName = "nul";
- }
-
- if (applType == APPL_DOS) {
- args[0] = (DWORD) Tcl_DStringValue(&cmdLine);
- args[1] = (DWORD) inputFileName;
- args[2] = (DWORD) outputFileName;
- trans[0] = &args[0];
- trans[1] = &args[1];
- trans[2] = &args[2];
- trans[3] = NULL;
- if (TclWinSynchSpawn(args, 0, trans, pidPtr) != 0) {
- result = TCL_OK;
- }
- } else if (applType == APPL_WIN3X) {
- args[0] = (DWORD) Tcl_DStringValue(&cmdLine);
- trans[0] = &args[0];
- trans[1] = NULL;
- if (TclWinSynchSpawn(args, 1, trans, pidPtr) != 0) {
- result = TCL_OK;
- }
- } else {
- if (CreateProcess(NULL, Tcl_DStringValue(&cmdLine), NULL, NULL,
- FALSE, DETACHED_PROCESS, NULL, NULL, &startInfo,
- &procInfo) != 0) {
- CloseHandle(procInfo.hThread);
- while (1) {
- if (GetExitCodeProcess(procInfo.hProcess, &status) == FALSE) {
- break;
- }
- if (status != STILL_ACTIVE) {
- break;
- }
- if (PeekMessage(&msg, NULL, 0, 0, PM_REMOVE) == TRUE) {
- TranslateMessage(&msg);
- DispatchMessage(&msg);
- }
- }
- *pidPtr = (Tcl_Pid) procInfo.hProcess;
- if (*pidPtr != 0) {
- ProcInfo *procPtr = (ProcInfo *) ckalloc(sizeof(ProcInfo));
- procPtr->hProcess = procInfo.hProcess;
- procPtr->dwProcessId = procInfo.dwProcessId;
- procPtr->nextPtr = procList;
- procList = procPtr;
- }
- result = TCL_OK;
- }
- }
- if (result != TCL_OK) {
- TclWinConvertError(GetLastError());
- Tcl_AppendResult(interp, "couldn't execute \"", originalName,
- "\": ", Tcl_PosixError(interp), (char *) NULL);
- }
-
- end32s:
- if (outputHandle != INVALID_HANDLE_VALUE) {
- /*
- * Now copy stuff from temp file to actual output handle. Don't
- * close outputHandle because it is associated with the output
- * file owned by the caller.
- */
-
- h = CreateFile(outputFileName, GENERIC_READ, 0, NULL, OPEN_ALWAYS,
- 0, NULL);
- if (h != INVALID_HANDLE_VALUE) {
- CopyChannel(outputHandle, h);
- }
- CloseHandle(h);
- }
-
- if (inputFileName == Tcl_DStringValue(&inputTempFile)) {
- DeleteFile(inputFileName);
- }
-
- if (outputFileName == Tcl_DStringValue(&outputTempFile)) {
- DeleteFile(outputFileName);
- }
-
- Tcl_DStringFree(&inputTempFile);
- Tcl_DStringFree(&outputTempFile);
- Tcl_DStringFree(&cmdLine);
- return result;
- }
- hProcess = GetCurrentProcess();
-
- /*
- * STARTF_USESTDHANDLES must be used to pass handles to child process.
- * Using SetStdHandle() and/or dup2() only works when a console mode
- * parent process is spawning an attached console mode child process.
- */
-
- ZeroMemory(&startInfo, sizeof(startInfo));
- startInfo.cb = sizeof(startInfo);
- startInfo.dwFlags = STARTF_USESTDHANDLES;
- startInfo.hStdInput = INVALID_HANDLE_VALUE;
- startInfo.hStdOutput= INVALID_HANDLE_VALUE;
- startInfo.hStdError = INVALID_HANDLE_VALUE;
-
- secAtts.nLength = sizeof(SECURITY_ATTRIBUTES);
- secAtts.lpSecurityDescriptor = NULL;
- secAtts.bInheritHandle = TRUE;
-
- /*
- * We have to check the type of each file, since we cannot duplicate
- * some file types.
- */
-
- inputHandle = INVALID_HANDLE_VALUE;
- if (inputFile != NULL) {
- filePtr = (WinFile *)inputFile;
- if (filePtr->type == WIN_FILE) {
- inputHandle = filePtr->handle;
- }
- }
- outputHandle = INVALID_HANDLE_VALUE;
- if (outputFile != NULL) {
- filePtr = (WinFile *)outputFile;
- if (filePtr->type == WIN_FILE) {
- outputHandle = filePtr->handle;
- }
- }
- errorHandle = INVALID_HANDLE_VALUE;
- if (errorFile != NULL) {
- filePtr = (WinFile *)errorFile;
- if (filePtr->type == WIN_FILE) {
- errorHandle = filePtr->handle;
- }
- }
-
- /*
- * Duplicate all the handles which will be passed off as stdin, stdout
- * and stderr of the child process. The duplicate handles are set to
- * be inheritable, so the child process can use them.
- */
-
- if (inputHandle == INVALID_HANDLE_VALUE) {
- /*
- * If handle was not set, stdin should return immediate EOF.
- * Under Windows95, some applications (both 16 and 32 bit!)
- * cannot read from the NUL device; they read from console
- * instead. When running tk, this is fatal because the child
- * process would hang forever waiting for EOF from the unmapped
- * console window used by the helper application.
- *
- * Fortunately, the helper application detects a closed pipe
- * as an immediate EOF and can pass that information to the
- * child process.
- */
-
- if (CreatePipe(&startInfo.hStdInput, &h, &secAtts, 0) != FALSE) {
- CloseHandle(h);
- }
- } else {
- DuplicateHandle(hProcess, inputHandle, hProcess, &startInfo.hStdInput,
- 0, TRUE, DUPLICATE_SAME_ACCESS);
- }
- if (startInfo.hStdInput == INVALID_HANDLE_VALUE) {
- TclWinConvertError(GetLastError());
- Tcl_AppendResult(interp, "couldn't duplicate input handle: ",
- Tcl_PosixError(interp), (char *) NULL);
- goto end;
- }
-
- if (outputHandle == INVALID_HANDLE_VALUE) {
- /*
- * If handle was not set, output should be sent to an infinitely
- * deep sink. Under Windows 95, some 16 bit applications cannot
- * have stdout redirected to NUL; they send their output to
- * the console instead. Some applications, like "more" or "dir /p",
- * when outputting multiple pages to the console, also then try and
- * read from the console to go the next page. When running tk, this
- * is fatal because the child process would hang forever waiting
- * for input from the unmapped console window used by the helper
- * application.
- *
- * Fortunately, the helper application will detect a closed pipe
- * as a sink.
- */
-
- if ((TclWinGetPlatformId() == VER_PLATFORM_WIN32_WINDOWS)
- && (applType == APPL_DOS)) {
- if (CreatePipe(&h, &startInfo.hStdOutput, &secAtts, 0) != FALSE) {
- CloseHandle(h);
- }
- } else {
- startInfo.hStdOutput = CreateFile("NUL:", GENERIC_WRITE, 0,
- &secAtts, OPEN_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);
- }
- } else {
- DuplicateHandle(hProcess, outputHandle, hProcess, &startInfo.hStdOutput,
- 0, TRUE, DUPLICATE_SAME_ACCESS);
- }
- if (startInfo.hStdOutput == INVALID_HANDLE_VALUE) {
- TclWinConvertError(GetLastError());
- Tcl_AppendResult(interp, "couldn't duplicate output handle: ",
- Tcl_PosixError(interp), (char *) NULL);
- goto end;
- }
-
- if (errorHandle == INVALID_HANDLE_VALUE) {
- /*
- * If handle was not set, errors should be sent to an infinitely
- * deep sink.
- */
-
- startInfo.hStdError = CreateFile("NUL:", GENERIC_WRITE, 0,
- &secAtts, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
- } else {
- DuplicateHandle(hProcess, errorHandle, hProcess, &startInfo.hStdError,
- 0, TRUE, DUPLICATE_SAME_ACCESS);
- }
- if (startInfo.hStdError == INVALID_HANDLE_VALUE) {
- TclWinConvertError(GetLastError());
- Tcl_AppendResult(interp, "couldn't duplicate error handle: ",
- Tcl_PosixError(interp), (char *) NULL);
- goto end;
- }
- /*
- * If we do not have a console window, then we must run DOS and
- * WIN32 console mode applications as detached processes. This tells
- * the loader that the child application should not inherit the
- * console, and that it should not create a new console window for
- * the child application. The child application should get its stdio
- * from the redirection handles provided by this application, and run
- * in the background.
- *
- * If we are starting a GUI process, they don't automatically get a
- * console, so it doesn't matter if they are started as foreground or
- * detached processes. The GUI window will still pop up to the
- * foreground.
- */
-
- if (TclWinGetPlatformId() == VER_PLATFORM_WIN32_NT) {
- if (HasConsole()) {
- createFlags = 0;
- } else if (applType == APPL_DOS) {
- /*
- * Under NT, 16-bit DOS applications will not run unless they
- * can be attached to a console. If we are running without a
- * console, run the 16-bit program as an normal process inside
- * of a hidden console application, and then run that hidden
- * console as a detached process.
- */
-
- startInfo.wShowWindow = SW_HIDE;
- startInfo.dwFlags |= STARTF_USESHOWWINDOW;
- createFlags = CREATE_NEW_CONSOLE;
- Tcl_DStringAppend(&cmdLine, "cmd.exe /c ", -1);
- } else {
- createFlags = DETACHED_PROCESS;
- }
- } else {
- if (HasConsole()) {
- createFlags = 0;
- } else {
- createFlags = DETACHED_PROCESS;
- }
-
- if (applType == APPL_DOS) {
- /*
- * Under Windows 95, 16-bit DOS applications do not work well
- * with pipes:
- *
- * 1. EOF on a pipe between a detached 16-bit DOS application
- * and another application is not seen at the other
- * end of the pipe, so the listening process blocks forever on
- * reads. This inablity to detect EOF happens when either a
- * 16-bit app or the 32-bit app is the listener.
- *
- * 2. If a 16-bit DOS application (detached or not) blocks when
- * writing to a pipe, it will never wake up again, and it
- * eventually brings the whole system down around it.
- *
- * The 16-bit application is run as a normal process inside
- * of a hidden helper console app, and this helper may be run
- * as a detached process. If any of the stdio handles is
- * a pipe, the helper application accumulates information
- * into temp files and forwards it to or from the DOS
- * application as appropriate. This means that DOS apps
- * must receive EOF from a stdin pipe before they will actually
- * begin, and must finish generating stdout or stderr before
- * the data will be sent to the next stage of the pipe.
- *
- * The helper app should be located in the same directory as
- * the tcl dll.
- */
-
- if (createFlags != 0) {
- startInfo.wShowWindow = SW_HIDE;
- startInfo.dwFlags |= STARTF_USESHOWWINDOW;
- createFlags = CREATE_NEW_CONSOLE;
- }
- Tcl_DStringAppend(&cmdLine, "tclpip" STRINGIFY(TCL_MAJOR_VERSION)
- STRINGIFY(TCL_MINOR_VERSION) ".dll ", -1);
- }
- }
-
- /*
- * cmdLine gets the full command line used to invoke the executable,
- * including the name of the executable itself. The command line
- * arguments in argv[] are stored in cmdLine separated by spaces.
- * Special characters in individual arguments from argv[] must be
- * quoted when being stored in cmdLine.
- *
- * When calling any application, bear in mind that arguments that
- * specify a path name are not converted. If an argument contains
- * forward slashes as path separators, it may or may not be
- * recognized as a path name, depending on the program. In general,
- * most applications accept forward slashes only as option
- * delimiters and backslashes only as paths.
- *
- * Additionally, when calling a 16-bit dos or windows application,
- * all path names must use the short, cryptic, path format (e.g.,
- * using ab~1.def instead of "a b.default").
- */
-
- BuildCommandLine(argc, argv, &cmdLine);
-
- if (!CreateProcess(NULL, Tcl_DStringValue(&cmdLine), NULL, NULL, TRUE,
- createFlags, NULL, NULL, &startInfo, &procInfo)) {
- TclWinConvertError(GetLastError());
- Tcl_AppendResult(interp, "couldn't execute \"", originalName,
- "\": ", Tcl_PosixError(interp), (char *) NULL);
- goto end;
- }
-
- if (applType == APPL_DOS) {
- WaitForSingleObject(hProcess, 50);
- }
-
- /*
- * "When an application spawns a process repeatedly, a new thread
- * instance will be created for each process but the previous
- * instances may not be cleaned up. This results in a significant
- * virtual memory loss each time the process is spawned. If there
- * is a WaitForInputIdle() call between CreateProcess() and
- * CloseHandle(), the problem does not occur." PSS ID Number: Q124121
- */
-
- WaitForInputIdle(procInfo.hProcess, 5000);
- CloseHandle(procInfo.hThread);
-
- *pidPtr = (Tcl_Pid) procInfo.hProcess;
- if (*pidPtr != 0) {
- ProcInfo *procPtr = (ProcInfo *) ckalloc(sizeof(ProcInfo));
- procPtr->hProcess = procInfo.hProcess;
- procPtr->dwProcessId = procInfo.dwProcessId;
- procPtr->nextPtr = procList;
- procList = procPtr;
- }
- result = TCL_OK;
-
- end:
- Tcl_DStringFree(&cmdLine);
- if (startInfo.hStdInput != INVALID_HANDLE_VALUE) {
- CloseHandle(startInfo.hStdInput);
- }
- if (startInfo.hStdOutput != INVALID_HANDLE_VALUE) {
- CloseHandle(startInfo.hStdOutput);
- }
- if (startInfo.hStdError != INVALID_HANDLE_VALUE) {
- CloseHandle(startInfo.hStdError);
- }
- return result;
- }
-
-
- /*
- *----------------------------------------------------------------------
- *
- * HasConsole --
- *
- * Determines whether the current application is attached to a
- * console.
- *
- * Results:
- * Returns TRUE if this application has a console, else FALSE.
- *
- * Side effects:
- * None.
- *
- *----------------------------------------------------------------------
- */
-
- static BOOL
- HasConsole()
- {
- HANDLE handle = CreateFile("CONOUT$", GENERIC_WRITE, FILE_SHARE_WRITE,
- NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
-
- if (handle != INVALID_HANDLE_VALUE) {
- CloseHandle(handle);
- return TRUE;
- } else {
- return FALSE;
- }
- }
-
- /*
- *--------------------------------------------------------------------
- *
- * ApplicationType --
- *
- * Search for the specified program and identify if it refers to a DOS,
- * Windows 3.X, or Win32 program. Used to determine how to invoke
- * a program, or if it can even be invoked.
- *
- * It is possible to almost positively identify DOS and Windows
- * applications that contain the appropriate magic numbers. However,
- * DOS .com files do not seem to contain a magic number; if the program
- * name ends with .com and could not be identified as a Windows .com
- * file, it will be assumed to be a DOS application, even if it was
- * just random data. If the program name does not end with .com, no
- * such assumption is made.
- *
- * The Win32 procedure GetBinaryType incorrectly identifies any
- * junk file that ends with .exe as a dos executable and some
- * executables that don't end with .exe as not executable. Plus it
- * doesn't exist under win95, so I won't feel bad about reimplementing
- * functionality.
- *
- * Results:
- * The return value is one of APPL_DOS, APPL_WIN3X, or APPL_WIN32
- * if the filename referred to the corresponding application type.
- * If the file name could not be found or did not refer to any known
- * application type, APPL_NONE is returned and an error message is
- * left in interp. .bat files are identified as APPL_DOS.
- *
- * Side effects:
- * None.
- *
- *----------------------------------------------------------------------
- */
-
- static int
- ApplicationType(interp, originalName, fullPath)
- Tcl_Interp *interp; /* Interp, for error message. */
- const char *originalName; /* Name of the application to find. */
- char fullPath[MAX_PATH]; /* Filled with complete path to
- * application. */
- {
- int applType, i;
- HANDLE hFile;
- char *ext, *rest;
- char buf[2];
- DWORD read;
- IMAGE_DOS_HEADER header;
- static char extensions[][5] = {"", ".com", ".exe", ".bat"};
-
- /* Look for the program as an external program. First try the name
- * as it is, then try adding .com, .exe, and .bat, in that order, to
- * the name, looking for an executable.
- *
- * Using the raw SearchPath() procedure doesn't do quite what is
- * necessary. If the name of the executable already contains a '.'
- * character, it will not try appending the specified extension when
- * searching (in other words, SearchPath will not find the program
- * "a.b.exe" if the arguments specified "a.b" and ".exe").
- * So, first look for the file as it is named. Then manually append
- * the extensions, looking for a match.
- */
-
- applType = APPL_NONE;
- for (i = 0; i < (int) (sizeof(extensions) / sizeof(extensions[0])); i++) {
- lstrcpyn(fullPath, originalName, MAX_PATH - 5);
- lstrcat(fullPath, extensions[i]);
-
- SearchPath(NULL, fullPath, NULL, MAX_PATH, fullPath, &rest);
-
- /*
- * Ignore matches on directories or data files, return if identified
- * a known type.
- */
-
- if (GetFileAttributes(fullPath) & FILE_ATTRIBUTE_DIRECTORY) {
- continue;
- }
-
- ext = strrchr(fullPath, '.');
- if ((ext != NULL) && (strcmpi(ext, ".bat") == 0)) {
- applType = APPL_DOS;
- break;
- }
-
- hFile = CreateFile(fullPath, GENERIC_READ, FILE_SHARE_READ, NULL,
- OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
- if (hFile == INVALID_HANDLE_VALUE) {
- continue;
- }
-
- header.e_magic = 0;
- ReadFile(hFile, (void *) &header, sizeof(header), &read, NULL);
- if (header.e_magic != IMAGE_DOS_SIGNATURE) {
- /*
- * Doesn't have the magic number for relocatable executables. If
- * filename ends with .com, assume it's a DOS application anyhow.
- * Note that we didn't make this assumption at first, because some
- * supposed .com files are really 32-bit executables with all the
- * magic numbers and everything.
- */
-
- CloseHandle(hFile);
- if ((ext != NULL) && (strcmpi(ext, ".com") == 0)) {
- applType = APPL_DOS;
- break;
- }
- continue;
- }
- if (header.e_lfarlc != sizeof(header)) {
- /*
- * All Windows 3.X and Win32 and some DOS programs have this value
- * set here. If it doesn't, assume that since it already had the
- * other magic number it was a DOS application.
- */
-
- CloseHandle(hFile);
- applType = APPL_DOS;
- break;
- }
-
- /*
- * The DWORD at header.e_lfanew points to yet another magic number.
- */
-
- buf[0] = '\0';
- SetFilePointer(hFile, header.e_lfanew, NULL, FILE_BEGIN);
- ReadFile(hFile, (void *) buf, 2, &read, NULL);
- CloseHandle(hFile);
-
- if ((buf[0] == 'L') && (buf[1] == 'E')) {
- applType = APPL_DOS;
- } else if ((buf[0] == 'N') && (buf[1] == 'E')) {
- applType = APPL_WIN3X;
- } else if ((buf[0] == 'P') && (buf[1] == 'E')) {
- applType = APPL_WIN32;
- } else {
- continue;
- }
- break;
- }
-
- if (applType == APPL_NONE) {
- TclWinConvertError(GetLastError());
- Tcl_AppendResult(interp, "couldn't execute \"", originalName,
- "\": ", Tcl_PosixError(interp), (char *) NULL);
- return APPL_NONE;
- }
-
- if ((applType == APPL_DOS) || (applType == APPL_WIN3X)) {
- /*
- * Replace long path name of executable with short path name for
- * 16-bit applications. Otherwise the application may not be able
- * to correctly parse its own command line to separate off the
- * application name from the arguments.
- */
-
- GetShortPathName(fullPath, fullPath, MAX_PATH);
- }
- return applType;
- }
-
- /*
- *----------------------------------------------------------------------
- *
- * BuildCommandLine --
- *
- * The command line arguments are stored in linePtr separated
- * by spaces, in a form that CreateProcess() understands. Special
- * characters in individual arguments from argv[] must be quoted
- * when being stored in cmdLine.
- *
- * Results:
- * None.
- *
- * Side effects:
- * None.
- *
- *----------------------------------------------------------------------
- */
-
- static void
- BuildCommandLine(argc, argv, linePtr)
- int argc; /* Number of arguments. */
- char **argv; /* Argument strings. */
- Tcl_DString *linePtr; /* Initialized Tcl_DString that receives the
- * command line. */
- {
- char *start, *special;
- int quote, i;
-
- for (i = 0; i < argc; i++) {
- if (i > 0) {
- Tcl_DStringAppend(linePtr, " ", 1);
- }
-
- quote = 0;
- for (start = argv[i]; *start != '\0'; start++) {
- if (isspace(*start)) {
- quote = 1;
- Tcl_DStringAppend(linePtr, "\"", 1);
- break;
- }
- }
-
- start = argv[i];
- for (special = argv[i]; ; ) {
- if ((*special == '\\') &&
- (special[1] == '\\' || special[1] == '"')) {
- Tcl_DStringAppend(linePtr, start, special - start);
- start = special;
- while (1) {
- special++;
- if (*special == '"') {
- /*
- * N backslashes followed a quote -> insert
- * N * 2 + 1 backslashes then a quote.
- */
-
- Tcl_DStringAppend(linePtr, start, special - start);
- break;
- }
- if (*special != '\\') {
- break;
- }
- }
- Tcl_DStringAppend(linePtr, start, special - start);
- start = special;
- }
- if (*special == '"') {
- Tcl_DStringAppend(linePtr, start, special - start);
- Tcl_DStringAppend(linePtr, "\\\"", 2);
- start = special + 1;
- }
- if (*special == '\0') {
- break;
- }
- special++;
- }
- Tcl_DStringAppend(linePtr, start, special - start);
- if (quote) {
- Tcl_DStringAppend(linePtr, "\"", 1);
- }
- }
- }
-
- /*
- *----------------------------------------------------------------------
- *
- * MakeTempFile --
- *
- * Helper function for TclpCreateProcess under Win32s. Makes a
- * temporary file that _won't_ go away automatically when it's file
- * handle is closed. Used for simulated pipes, which are written
- * in one pass and reopened and read in the next pass.
- *
- * Results:
- * namePtr is filled with the name of the temporary file.
- *
- * Side effects:
- * A temporary file with the name specified by namePtr is created.
- * The caller is responsible for deleting this temporary file.
- *
- *----------------------------------------------------------------------
- */
-
- static char *
- MakeTempFile(namePtr)
- Tcl_DString *namePtr; /* Initialized Tcl_DString that is filled
- * with the name of the temporary file that
- * was created. */
- {
- char name[MAX_PATH];
-
- if ((GetTempPath(MAX_PATH, name) == 0)
- || (GetTempFileName(name, "TCL", 0, name) == 0)) {
- return NULL;
- }
-
- Tcl_DStringAppend(namePtr, name, -1);
- return Tcl_DStringValue(namePtr);
- }
-
- /*
- *----------------------------------------------------------------------
- *
- * CopyChannel --
- *
- * Helper function used by TclpCreateProcess under Win32s. Copies
- * what remains of source file to destination file; source file
- * pointer need not be positioned at the beginning of the file if
- * all of source file is not desired, but data is copied up to end
- * of source file.
- *
- * Results:
- * None.
- *
- * Side effects:
- * None.
- *
- *----------------------------------------------------------------------
- */
-
- static void
- CopyChannel(dst, src)
- HANDLE dst; /* Destination file. */
- HANDLE src; /* Source file. */
- {
- char buf[8192];
- DWORD dwRead, dwWrite;
-
- while (ReadFile(src, buf, sizeof(buf), &dwRead, NULL) != FALSE) {
- if (dwRead == 0) {
- break;
- }
- if (WriteFile(dst, buf, dwRead, &dwWrite, NULL) == FALSE) {
- break;
- }
- }
- }
-
- /*
- *----------------------------------------------------------------------
- *
- * TclpCreateCommandChannel --
- *
- * This function is called by Tcl_OpenCommandChannel to perform
- * the platform specific channel initialization for a command
- * channel.
- *
- * Results:
- * Returns a new channel or NULL on failure.
- *
- * Side effects:
- * Allocates a new channel.
- *
- *----------------------------------------------------------------------
- */
-
- Tcl_Channel
- TclpCreateCommandChannel(readFile, writeFile, errorFile, numPids, pidPtr)
- TclFile readFile; /* If non-null, gives the file for reading. */
- TclFile writeFile; /* If non-null, gives the file for writing. */
- TclFile errorFile; /* If non-null, gives the file where errors
- * can be read. */
- int numPids; /* The number of pids in the pid array. */
- Tcl_Pid *pidPtr; /* An array of process identifiers. */
- {
- char channelName[20];
- int channelId;
- PipeInfo *infoPtr = (PipeInfo *) ckalloc((unsigned) sizeof(PipeInfo));
-
- infoPtr->watchMask = 0;
- infoPtr->flags = 0;
- infoPtr->readFile = readFile;
- infoPtr->writeFile = writeFile;
- infoPtr->errorFile = errorFile;
- infoPtr->numPids = numPids;
- infoPtr->pidPtr = pidPtr;
-
- /*
- * Use one of the fds associated with the channel as the
- * channel id.
- */
-
- if (readFile) {
- WinPipe *pipePtr = (WinPipe *) readFile;
- if (pipePtr->file.type == WIN32S_PIPE
- && pipePtr->file.handle == INVALID_HANDLE_VALUE) {
- pipePtr->file.handle = CreateFile(pipePtr->fileName, GENERIC_READ,
- 0, NULL, OPEN_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);
- }
- channelId = (int) pipePtr->file.handle;
- } else if (writeFile) {
- channelId = (int) ((WinFile*)writeFile)->handle;
- } else if (errorFile) {
- channelId = (int) ((WinFile*)errorFile)->handle;
- } else {
- channelId = 0;
- }
-
- infoPtr->validMask = 0;
- if (readFile != NULL) {
- infoPtr->validMask |= TCL_READABLE;
- }
- if (writeFile != NULL) {
- infoPtr->validMask |= TCL_WRITABLE;
- }
-
- /*
- * For backward compatibility with previous versions of Tcl, we
- * use "file%d" as the base name for pipes even though it would
- * be more natural to use "pipe%d".
- */
-
- sprintf(channelName, "file%d", channelId);
- infoPtr->channel = Tcl_CreateChannel(&pipeChannelType, channelName,
- (ClientData) infoPtr, infoPtr->validMask);
-
- /*
- * Pipes have AUTO translation mode on Windows and ^Z eof char, which
- * means that a ^Z will be appended to them at close. This is needed
- * for Windows programs that expect a ^Z at EOF.
- */
-
- Tcl_SetChannelOption((Tcl_Interp *) NULL, infoPtr->channel,
- "-translation", "auto");
- Tcl_SetChannelOption((Tcl_Interp *) NULL, infoPtr->channel,
- "-eofchar", "\032 {}");
- return infoPtr->channel;
- }
-
- /*
- *----------------------------------------------------------------------
- *
- * TclGetAndDetachPids --
- *
- * Stores a list of the command PIDs for a command channel in
- * interp->result.
- *
- * Results:
- * None.
- *
- * Side effects:
- * Modifies interp->result.
- *
- *----------------------------------------------------------------------
- */
-
- void
- TclGetAndDetachPids(interp, chan)
- Tcl_Interp *interp;
- Tcl_Channel chan;
- {
- PipeInfo *pipePtr;
- Tcl_ChannelType *chanTypePtr;
- int i;
- char buf[20];
-
- /*
- * Punt if the channel is not a command channel.
- */
-
- chanTypePtr = Tcl_GetChannelType(chan);
- if (chanTypePtr != &pipeChannelType) {
- return;
- }
-
- pipePtr = (PipeInfo *) Tcl_GetChannelInstanceData(chan);
- for (i = 0; i < pipePtr->numPids; i++) {
- sprintf(buf, "%lu", TclpGetPid(pipePtr->pidPtr[i]));
- Tcl_AppendElement(interp, buf);
- Tcl_DetachPids(1, &(pipePtr->pidPtr[i]));
- }
- if (pipePtr->numPids > 0) {
- ckfree((char *) pipePtr->pidPtr);
- pipePtr->numPids = 0;
- }
- }
-
- /*
- *----------------------------------------------------------------------
- *
- * PipeBlockModeProc --
- *
- * Set blocking or non-blocking mode on channel.
- *
- * Results:
- * 0 if successful, errno when failed.
- *
- * Side effects:
- * Sets the device into blocking or non-blocking mode.
- *
- *----------------------------------------------------------------------
- */
-
- static int
- PipeBlockModeProc(instanceData, mode)
- ClientData instanceData; /* Instance data for channel. */
- int mode; /* TCL_MODE_BLOCKING or
- * TCL_MODE_NONBLOCKING. */
- {
- PipeInfo *infoPtr = (PipeInfo *) instanceData;
-
- /*
- * Pipes on Windows can not be switched between blocking and nonblocking,
- * hence we have to emulate the behavior. This is done in the input
- * function by checking against a bit in the state. We set or unset the
- * bit here to cause the input function to emulate the correct behavior.
- */
-
- if (mode == TCL_MODE_NONBLOCKING) {
- infoPtr->flags |= PIPE_ASYNC;
- } else {
- infoPtr->flags &= ~(PIPE_ASYNC);
- }
- return 0;
- }
-
- /*
- *----------------------------------------------------------------------
- *
- * PipeCloseProc --
- *
- * Closes a pipe based IO channel.
- *
- * Results:
- * 0 on success, errno otherwise.
- *
- * Side effects:
- * Closes the physical channel.
- *
- *----------------------------------------------------------------------
- */
-
- static int
- PipeCloseProc(instanceData, interp)
- ClientData instanceData; /* Pointer to PipeInfo structure. */
- Tcl_Interp *interp; /* For error reporting. */
- {
- PipeInfo *pipePtr = (PipeInfo *) instanceData;
- Tcl_Channel errChan;
- int errorCode, result;
- PipeInfo *infoPtr, **nextPtrPtr;
-
- /*
- * Remove the file from the list of watched files.
- */
-
- for (nextPtrPtr = &firstPipePtr, infoPtr = *nextPtrPtr; infoPtr != NULL;
- nextPtrPtr = &infoPtr->nextPtr, infoPtr = *nextPtrPtr) {
- if (infoPtr == (PipeInfo *)pipePtr) {
- *nextPtrPtr = infoPtr->nextPtr;
- break;
- }
- }
-
- errorCode = 0;
- if (pipePtr->readFile != NULL) {
- if (TclpCloseFile(pipePtr->readFile) != 0) {
- errorCode = errno;
- }
- }
- if (pipePtr->writeFile != NULL) {
- if (TclpCloseFile(pipePtr->writeFile) != 0) {
- if (errorCode == 0) {
- errorCode = errno;
- }
- }
- }
-
- /*
- * Wrap the error file into a channel and give it to the cleanup
- * routine. If we are running in Win32s, just delete the error file
- * immediately, because it was never used.
- */
-
- if (pipePtr->errorFile) {
- WinFile *filePtr;
- OSVERSIONINFO os;
-
- os.dwOSVersionInfoSize = sizeof(os);
- GetVersionEx(&os);
- if (os.dwPlatformId == VER_PLATFORM_WIN32s) {
- TclpCloseFile(pipePtr->errorFile);
- errChan = NULL;
- } else {
- filePtr = (WinFile*)pipePtr->errorFile;
- errChan = Tcl_MakeFileChannel((ClientData) filePtr->handle,
- TCL_READABLE);
- }
- } else {
- errChan = NULL;
- }
- result = TclCleanupChildren(interp, pipePtr->numPids, pipePtr->pidPtr,
- errChan);
- if (pipePtr->numPids > 0) {
- ckfree((char *) pipePtr->pidPtr);
- }
- ckfree((char*) pipePtr);
-
- if (errorCode == 0) {
- return result;
- }
- return errorCode;
- }
-
- /*
- *----------------------------------------------------------------------
- *
- * PipeInputProc --
- *
- * Reads input from the IO channel into the buffer given. Returns
- * count of how many bytes were actually read, and an error indication.
- *
- * Results:
- * A count of how many bytes were read is returned and an error
- * indication is returned in an output argument.
- *
- * Side effects:
- * Reads input from the actual channel.
- *
- *----------------------------------------------------------------------
- */
-
- static int
- PipeInputProc(instanceData, buf, bufSize, errorCode)
- ClientData instanceData; /* Pipe state. */
- char *buf; /* Where to store data read. */
- int bufSize; /* How much space is available
- * in the buffer? */
- int *errorCode; /* Where to store error code. */
- {
- PipeInfo *infoPtr = (PipeInfo *) instanceData;
- WinFile *filePtr = (WinFile*) infoPtr->readFile;
- DWORD count;
- DWORD bytesRead;
-
- *errorCode = 0;
- if (filePtr->type == WIN32S_PIPE) {
- if (((WinPipe *)filePtr)->otherPtr != NULL) {
- panic("PipeInputProc: child process isn't finished writing");
- }
- if (filePtr->handle == INVALID_HANDLE_VALUE) {
- filePtr->handle = CreateFile(((WinPipe *)filePtr)->fileName,
- GENERIC_READ, 0, NULL, OPEN_ALWAYS, FILE_ATTRIBUTE_NORMAL,
- NULL);
- }
- if (filePtr->handle == INVALID_HANDLE_VALUE) {
- goto error;
- }
- } else {
- /*
- * Pipes will block until the requested number of bytes has been
- * read. To avoid blocking unnecessarily, we look ahead and only
- * read as much as is available.
- */
-
- if (PeekNamedPipe(filePtr->handle, (LPVOID) NULL, (DWORD) 0,
- (LPDWORD) NULL, &count, (LPDWORD) NULL) == TRUE) {
- if ((count != 0) && ((DWORD) bufSize > count)) {
- bufSize = (int) count;
-
- /*
- * This code is commented out because on Win95 we don't get
- * notifier of eof on a pipe unless we try to read it.
- * The correct solution is to move to threads.
- */
-
- /* } else if ((count == 0) && (infoPtr->flags & PIPE_ASYNC)) { */
- /* errno = *errorCode = EAGAIN; */
- /* return -1; */
- } else if ((count == 0) && !(infoPtr->flags & PIPE_ASYNC)) {
- bufSize = 1;
- }
- } else {
- goto error;
- }
- }
-
- /*
- * Note that we will block on reads from a console buffer until a
- * full line has been entered. The only way I know of to get
- * around this is to write a console driver. We should probably
- * do this at some point, but for now, we just block.
- */
-
- if (ReadFile(filePtr->handle, (LPVOID) buf, (DWORD) bufSize, &bytesRead,
- (LPOVERLAPPED) NULL) == FALSE) {
- goto error;
- }
-
- return bytesRead;
-
- error:
- TclWinConvertError(GetLastError());
- if (errno == EPIPE) {
- return 0;
- }
- *errorCode = errno;
- return -1;
- }
-
- /*
- *----------------------------------------------------------------------
- *
- * PipeOutputProc --
- *
- * Writes the given output on the IO channel. Returns count of how
- * many characters were actually written, and an error indication.
- *
- * Results:
- * A count of how many characters were written is returned and an
- * error indication is returned in an output argument.
- *
- * Side effects:
- * Writes output on the actual channel.
- *
- *----------------------------------------------------------------------
- */
-
- static int
- PipeOutputProc(instanceData, buf, toWrite, errorCode)
- ClientData instanceData; /* Pipe state. */
- char *buf; /* The data buffer. */
- int toWrite; /* How many bytes to write? */
- int *errorCode; /* Where to store error code. */
- {
- PipeInfo *infoPtr = (PipeInfo *) instanceData;
- WinFile *filePtr = (WinFile*) infoPtr->writeFile;
- DWORD bytesWritten;
-
- *errorCode = 0;
- if (WriteFile(filePtr->handle, (LPVOID) buf, (DWORD) toWrite,
- &bytesWritten, (LPOVERLAPPED) NULL) == FALSE) {
- TclWinConvertError(GetLastError());
- if (errno == EPIPE) {
- return 0;
- }
- *errorCode = errno;
- return -1;
- }
- return bytesWritten;
- }
-
- /*
- *----------------------------------------------------------------------
- *
- * PipeEventProc --
- *
- * This function is invoked by Tcl_ServiceEvent when a file event
- * reaches the front of the event queue. This procedure invokes
- * Tcl_NotifyChannel on the pipe.
- *
- * Results:
- * Returns 1 if the event was handled, meaning it should be removed
- * from the queue. Returns 0 if the event was not handled, meaning
- * it should stay on the queue. The only time the event isn't
- * handled is if the TCL_FILE_EVENTS flag bit isn't set.
- *
- * Side effects:
- * Whatever the notifier callback does.
- *
- *----------------------------------------------------------------------
- */
-
- static int
- PipeEventProc(evPtr, flags)
- Tcl_Event *evPtr; /* Event to service. */
- int flags; /* Flags that indicate what events to
- * handle, such as TCL_FILE_EVENTS. */
- {
- PipeEvent *pipeEvPtr = (PipeEvent *)evPtr;
- PipeInfo *infoPtr;
- WinFile *filePtr;
- int mask;
- /* DWORD count;*/
-
- if (!(flags & TCL_FILE_EVENTS)) {
- return 0;
- }
-
- /*
- * Search through the list of watched pipes for the one whose handle
- * matches the event. We do this rather than simply dereferencing
- * the handle in the event so that pipes can be deleted while the
- * event is in the queue.
- */
-
- for (infoPtr = firstPipePtr; infoPtr != NULL; infoPtr = infoPtr->nextPtr) {
- if (pipeEvPtr->infoPtr == infoPtr) {
- infoPtr->flags &= ~(PIPE_PENDING);
- break;
- }
- }
-
- /*
- * Remove stale events.
- */
-
- if (!infoPtr) {
- return 1;
- }
-
- /*
- * If we aren't on Win32s, check to see if the pipe is readable. Note
- * that we can't tell if a pipe is writable, so we always report it
- * as being writable.
- */
-
- filePtr = (WinFile*) ((PipeInfo*)infoPtr)->readFile;
- if (filePtr->type != WIN32S_PIPE) {
-
- /*
- * On windows 95, PeekNamedPipe returns 0 on eof so we can't
- * distinguish underflow from eof. The correct solution is to
- * switch to the threaded implementation.
- */
- mask = TCL_WRITABLE|TCL_READABLE;
- /* if (PeekNamedPipe(filePtr->handle, (LPVOID) NULL, (DWORD) 0, */
- /* (LPDWORD) NULL, &count, (LPDWORD) NULL) == TRUE) { */
- /* if (count != 0) { */
- /* mask |= TCL_READABLE; */
- /* } */
- /* } else { */
-
- /*
- * If the pipe has been closed by the other side, then
- * mark the pipe as readable, but not writable.
- */
-
- /* if (GetLastError() == ERROR_BROKEN_PIPE) { */
- /* mask = TCL_READABLE; */
- /* } */
- /* } */
- } else {
- mask = TCL_READABLE | TCL_WRITABLE;
- }
-
- /*
- * Inform the channel of the events.
- */
-
- Tcl_NotifyChannel(infoPtr->channel, infoPtr->watchMask & mask);
- return 1;
- }
-
- /*
- *----------------------------------------------------------------------
- *
- * PipeWatchProc --
- *
- * Called by the notifier to set up to watch for events on this
- * channel.
- *
- * Results:
- * None.
- *
- * Side effects:
- * None.
- *
- *----------------------------------------------------------------------
- */
-
- static void
- PipeWatchProc(instanceData, mask)
- ClientData instanceData; /* Pipe state. */
- int mask; /* What events to watch for; OR-ed
- * combination of TCL_READABLE,
- * TCL_WRITABLE and TCL_EXCEPTION. */
- {
- PipeInfo **nextPtrPtr, *ptr;
- PipeInfo *infoPtr = (PipeInfo *) instanceData;
- int oldMask = infoPtr->watchMask;
-
- if (!initialized) {
- PipeInit();
- }
-
- /*
- * For now, we just send a message to ourselves so we can poll the
- * channel for readable events.
- */
-
- infoPtr->watchMask = mask & infoPtr->validMask;
- if (infoPtr->watchMask) {
- Tcl_Time blockTime = { 0, 0 };
- if (!oldMask) {
- infoPtr->nextPtr = firstPipePtr;
- firstPipePtr = infoPtr;
- }
- Tcl_SetMaxBlockTime(&blockTime);
- } else {
- if (oldMask) {
- /*
- * Remove the pipe from the list of watched pipes.
- */
-
- for (nextPtrPtr = &firstPipePtr, ptr = *nextPtrPtr;
- ptr != NULL;
- nextPtrPtr = &ptr->nextPtr, ptr = *nextPtrPtr) {
- if (infoPtr == ptr) {
- *nextPtrPtr = ptr->nextPtr;
- break;
- }
- }
- }
- }
- }
-
- /*
- *----------------------------------------------------------------------
- *
- * PipeGetHandleProc --
- *
- * Called from Tcl_GetChannelHandle to retrieve OS handles from
- * inside a command pipeline based channel.
- *
- * Results:
- * Returns TCL_OK with the fd in handlePtr, or TCL_ERROR if
- * there is no handle for the specified direction.
- *
- * Side effects:
- * None.
- *
- *----------------------------------------------------------------------
- */
-
- static int
- PipeGetHandleProc(instanceData, direction, handlePtr)
- ClientData instanceData; /* The pipe state. */
- int direction; /* TCL_READABLE or TCL_WRITABLE */
- ClientData *handlePtr; /* Where to store the handle. */
- {
- PipeInfo *infoPtr = (PipeInfo *) instanceData;
- WinFile *filePtr;
-
- if (direction == TCL_READABLE && infoPtr->readFile) {
- filePtr = (WinFile*) infoPtr->readFile;
- if (filePtr->type == WIN32S_PIPE) {
- if (filePtr->handle == INVALID_HANDLE_VALUE) {
- filePtr->handle = CreateFile(((WinPipe *)filePtr)->fileName,
- GENERIC_READ, 0, NULL, OPEN_ALWAYS,
- FILE_ATTRIBUTE_NORMAL, NULL);
- }
- if (filePtr->handle == INVALID_HANDLE_VALUE) {
- return TCL_ERROR;
- }
- }
- *handlePtr = (ClientData) filePtr->handle;
- return TCL_OK;
- }
- if (direction == TCL_WRITABLE && infoPtr->writeFile) {
- filePtr = (WinFile*) infoPtr->writeFile;
- *handlePtr = (ClientData) filePtr->handle;
- return TCL_OK;
- }
- return TCL_ERROR;
- }
-
- /*
- *----------------------------------------------------------------------
- *
- * Tcl_WaitPid --
- *
- * Emulates the waitpid system call.
- *
- * Results:
- * Returns 0 if the process is still alive, -1 on an error, or
- * the pid on a clean close.
- *
- * Side effects:
- * Unless WNOHANG is set and the wait times out, the process
- * information record will be deleted and the process handle
- * will be closed.
- *
- *----------------------------------------------------------------------
- */
-
- Tcl_Pid
- Tcl_WaitPid(pid, statPtr, options)
- Tcl_Pid pid;
- int *statPtr;
- int options;
- {
- ProcInfo *infoPtr, **prevPtrPtr;
- int flags;
- Tcl_Pid result;
- DWORD ret;
-
- if (options & WNOHANG) {
- flags = 0;
- } else {
- flags = INFINITE;
- }
- if (pid == 0) {
- *statPtr = 0;
- return 0;
- }
-
- /*
- * Find the process on the process list.
- */
-
- prevPtrPtr = &procList;
- for (infoPtr = procList; infoPtr != NULL;
- prevPtrPtr = &infoPtr->nextPtr, infoPtr = infoPtr->nextPtr) {
- if (infoPtr->hProcess == (HANDLE) pid) {
- break;
- }
- }
- if (infoPtr == NULL) {
- return 0;
- }
-
- ret = WaitForSingleObject(infoPtr->hProcess, flags);
- if (ret == WAIT_TIMEOUT) {
- *statPtr = 0;
- if (options & WNOHANG) {
- return 0;
- } else {
- result = 0;
- }
- } else if (ret != WAIT_FAILED) {
- GetExitCodeProcess(infoPtr->hProcess, (DWORD*)statPtr);
- *statPtr = ((*statPtr << 8) & 0xff00);
- result = pid;
- } else {
- errno = ECHILD;
- result = (Tcl_Pid) -1;
- }
-
- /*
- * Remove the process from the process list and close the process handle.
- */
- CloseHandle(infoPtr->hProcess);
- *prevPtrPtr = infoPtr->nextPtr;
- ckfree((char*)infoPtr);
-
- return result;
- }
-
- /*
- *----------------------------------------------------------------------
- *
- * Tcl_PidObjCmd --
- *
- * This procedure is invoked to process the "pid" Tcl command.
- * See the user documentation for details on what it does.
- *
- * Results:
- * A standard Tcl result.
- *
- * Side effects:
- * See the user documentation.
- *
- *----------------------------------------------------------------------
- */
-
- /* ARGSUSED */
- int
- Tcl_PidObjCmd(dummy, interp, objc, objv)
- ClientData dummy; /* Not used. */
- Tcl_Interp *interp; /* Current interpreter. */
- int objc; /* Number of arguments. */
- Tcl_Obj *CONST *objv; /* Argument strings. */
- {
- Tcl_Channel chan;
- Tcl_ChannelType *chanTypePtr;
- PipeInfo *pipePtr;
- int i;
- Tcl_Obj *resultPtr;
- char buf[20];
-
- if (objc > 2) {
- Tcl_WrongNumArgs(interp, 1, objv, "?channelId?");
- return TCL_ERROR;
- }
- if (objc == 1) {
- resultPtr = Tcl_GetObjResult(interp);
- sprintf(buf, "%lu", (unsigned long) getpid());
- Tcl_SetStringObj(resultPtr, buf, -1);
- } else {
- chan = Tcl_GetChannel(interp, Tcl_GetStringFromObj(objv[1], NULL),
- NULL);
- if (chan == (Tcl_Channel) NULL) {
- return TCL_ERROR;
- }
- chanTypePtr = Tcl_GetChannelType(chan);
- if (chanTypePtr != &pipeChannelType) {
- return TCL_OK;
- }
-
- pipePtr = (PipeInfo *) Tcl_GetChannelInstanceData(chan);
- resultPtr = Tcl_GetObjResult(interp);
- for (i = 0; i < pipePtr->numPids; i++) {
- sprintf(buf, "%lu", TclpGetPid(pipePtr->pidPtr[i]));
- Tcl_ListObjAppendElement(/*interp*/ NULL, resultPtr,
- Tcl_NewStringObj(buf, -1));
- }
- }
- return TCL_OK;
- }
-