2 * msvcrt.dll spawn/exec functions
4 * Copyright 1996,1998 Marcus Meissner
5 * Copyright 1996 Jukka Iivonen
6 * Copyright 1997,2000 Uwe Bonnes
7 * Copyright 2000 Jon Griffiths
9 * This library is free software; you can redistribute it and/or
10 * modify it under the terms of the GNU Lesser General Public
11 * License as published by the Free Software Foundation; either
12 * version 2.1 of the License, or (at your option) any later version.
14 * This library is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 * Lesser General Public License for more details.
19 * You should have received a copy of the GNU Lesser General Public
20 * License along with this library; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
24 * -File handles need some special handling. Sometimes children get
25 * open file handles, sometimes not. The docs are confusing
26 * -No check for maximum path/argument/environment size is done
33 #include "wine/debug.h"
35 WINE_DEFAULT_DEBUG_CHANNEL(msvcrt);
37 /* INTERNAL: Spawn a child process */
38 static MSVCRT_intptr_t msvcrt_spawn(int flags, const char* exe, char* cmdline, char* env)
41 PROCESS_INFORMATION pi;
43 if ((unsigned)flags > MSVCRT__P_DETACH)
45 *MSVCRT__errno() = MSVCRT_EINVAL;
49 memset(&si, 0, sizeof(si));
51 msvcrt_create_io_inherit_block(&si);
52 if (!CreateProcessA(exe, cmdline, NULL, NULL, TRUE,
53 flags == MSVCRT__P_DETACH ? DETACHED_PROCESS : 0,
56 msvcrt_set_errno(GetLastError());
57 MSVCRT_free(si.lpReserved2);
61 MSVCRT_free(si.lpReserved2);
65 WaitForSingleObject(pi.hProcess, INFINITE);
66 GetExitCodeProcess(pi.hProcess,&pi.dwProcessId);
67 CloseHandle(pi.hProcess);
68 CloseHandle(pi.hThread);
69 return pi.dwProcessId;
70 case MSVCRT__P_DETACH:
71 CloseHandle(pi.hProcess);
74 case MSVCRT__P_NOWAIT:
75 case MSVCRT__P_NOWAITO:
76 CloseHandle(pi.hThread);
77 return (MSVCRT_intptr_t)pi.hProcess;
78 case MSVCRT__P_OVERLAY:
81 return -1; /* can't reach here */
84 /* INTERNAL: Convert argv list to a single 'delim'-separated string, with an
85 * extra '\0' to terminate it
87 static char* msvcrt_argvtos(const char* const* arg, char delim)
96 /* Return NULL for an empty environment list */
105 size += strlen(*a) + 1;
109 ret = (char*)MSVCRT_malloc(size + 1);
118 int len = strlen(*a);
124 if (delim && p > ret) p[-1] = 0;
129 /* INTERNAL: Convert va_list to a single 'delim'-separated string, with an
130 * extra '\0' to terminate it
132 static char* msvcrt_valisttos(const char* arg0, va_list alist, char delim)
141 va_copy(alist2,alist);
143 # ifdef HAVE___VA_COPY
144 __va_copy(alist2,alist);
152 /* Return NULL for an empty environment list */
160 size += strlen(arg) + 1;
161 arg = va_arg(alist, char*);
162 } while (arg != NULL);
164 ret = (char*)MSVCRT_malloc(size + 1);
172 int len = strlen(arg);
176 arg = va_arg(alist2, char*);
177 } while (arg != NULL);
178 if (delim && p > ret) p[-1] = 0;
183 /*********************************************************************
186 MSVCRT_intptr_t _cwait(int *status, MSVCRT_intptr_t pid, int action)
188 HANDLE hPid = (HANDLE)pid;
191 action = action; /* Remove warning */
193 if (!WaitForSingleObject(hPid, INFINITE))
198 GetExitCodeProcess(hPid, &stat);
203 doserrno = GetLastError();
205 if (doserrno == ERROR_INVALID_HANDLE)
207 *MSVCRT__errno() = MSVCRT_ECHILD;
208 *MSVCRT___doserrno() = doserrno;
211 msvcrt_set_errno(doserrno);
213 return status ? *status = -1 : -1;
216 /*********************************************************************
219 * Like on Windows, this function does not handle arguments with spaces
222 MSVCRT_intptr_t _execl(const char* name, const char* arg0, ...)
229 args = msvcrt_valisttos(arg0, ap, ' ');
232 ret = msvcrt_spawn(MSVCRT__P_OVERLAY, name, args, NULL);
238 /*********************************************************************
241 MSVCRT_intptr_t _execle(const char* name, const char* arg0, ...)
247 /*********************************************************************
250 * Like on Windows, this function does not handle arguments with spaces
253 MSVCRT_intptr_t _execlp(const char* name, const char* arg0, ...)
258 char fullname[MAX_PATH];
260 _searchenv(name, "PATH", fullname);
263 args = msvcrt_valisttos(arg0, ap, ' ');
266 ret = msvcrt_spawn(MSVCRT__P_OVERLAY, fullname[0] ? fullname : name, args, NULL);
272 /*********************************************************************
273 * _execlpe (MSVCRT.@)
275 MSVCRT_intptr_t _execlpe(const char* name, const char* arg0, ...)
281 /*********************************************************************
284 * Like on Windows, this function does not handle arguments with spaces
287 MSVCRT_intptr_t _execv(const char* name, char* const* argv)
289 return _spawnve(MSVCRT__P_OVERLAY, name, (const char* const*) argv, NULL);
292 /*********************************************************************
295 * Like on Windows, this function does not handle arguments with spaces
298 MSVCRT_intptr_t _execve(const char* name, char* const* argv, const char* const* envv)
300 return _spawnve(MSVCRT__P_OVERLAY, name, (const char* const*) argv, envv);
303 /*********************************************************************
304 * _execvpe (MSVCRT.@)
306 * Like on Windows, this function does not handle arguments with spaces
309 MSVCRT_intptr_t _execvpe(const char* name, char* const* argv, const char* const* envv)
311 char fullname[MAX_PATH];
313 _searchenv(name, "PATH", fullname);
314 return _spawnve(MSVCRT__P_OVERLAY, fullname[0] ? fullname : name,
315 (const char* const*) argv, envv);
318 /*********************************************************************
321 * Like on Windows, this function does not handle arguments with spaces
324 MSVCRT_intptr_t _execvp(const char* name, char* const* argv)
326 return _execvpe(name, argv, NULL);
329 /*********************************************************************
332 * Like on Windows, this function does not handle arguments with spaces
335 MSVCRT_intptr_t _spawnl(int flags, const char* name, const char* arg0, ...)
342 args = msvcrt_valisttos(arg0, ap, ' ');
345 ret = msvcrt_spawn(flags, name, args, NULL);
351 /*********************************************************************
352 * _spawnle (MSVCRT.@)
354 MSVCRT_intptr_t _spawnle(int flags, const char* name, const char* arg0, ...)
357 char *args, *envs = NULL;
358 const char * const *envp;
362 args = msvcrt_valisttos(arg0, ap, ' ');
366 while (va_arg( ap, char * ) != NULL) /*nothing*/;
367 envp = va_arg( ap, const char * const * );
368 if (envp) envs = msvcrt_argvtos(envp, 0);
371 ret = msvcrt_spawn(flags, name, args, envs);
374 if (envs) MSVCRT_free(envs);
379 /*********************************************************************
380 * _spawnlp (MSVCRT.@)
382 * Like on Windows, this function does not handle arguments with spaces
385 MSVCRT_intptr_t _spawnlp(int flags, const char* name, const char* arg0, ...)
390 char fullname[MAX_PATH];
392 _searchenv(name, "PATH", fullname);
395 args = msvcrt_valisttos(arg0, ap, ' ');
398 ret = msvcrt_spawn(flags, fullname[0] ? fullname : name, args, NULL);
404 /*********************************************************************
405 * _spawnlpe (MSVCRT.@)
407 MSVCRT_intptr_t _spawnlpe(int flags, const char* name, const char* arg0, ...)
410 char *args, *envs = NULL;
411 const char * const *envp;
413 char fullname[MAX_PATH];
415 _searchenv(name, "PATH", fullname);
418 args = msvcrt_valisttos(arg0, ap, ' ');
422 while (va_arg( ap, char * ) != NULL) /*nothing*/;
423 envp = va_arg( ap, const char * const * );
424 if (envp) envs = msvcrt_argvtos(envp, 0);
427 ret = msvcrt_spawn(flags, fullname[0] ? fullname : name, args, envs);
430 if (envs) MSVCRT_free(envs);
434 /*********************************************************************
435 * _spawnve (MSVCRT.@)
437 * Like on Windows, this function does not handle arguments with spaces
440 MSVCRT_intptr_t _spawnve(int flags, const char* name, const char* const* argv,
441 const char* const* envv)
443 char * args = msvcrt_argvtos(argv,' ');
444 char * envs = msvcrt_argvtos(envv,0);
445 char fullname[MAX_PATH];
448 MSVCRT_intptr_t ret = -1;
450 TRACE(":call (%s), params (%s), env (%s)\n",debugstr_a(name),debugstr_a(args),
451 envs?"Custom":"Null");
453 /* no check for NULL name.
454 native doesn't do it */
456 p = memchr(name, '\0', MAX_PATH);
458 p = name + MAX_PATH - 1;
461 /* extra-long names are silently truncated. */
462 memcpy(fullname, name, len);
464 for( p--; p >= name; p-- )
466 if( *p == '\\' || *p == '/' || *p == ':' || *p == '.' )
470 /* if no extension is given, assume .exe */
471 if( (p < name || *p != '.') && len <= MAX_PATH - 5 )
473 FIXME("only trying .exe when no extension given\n");
474 memcpy(fullname+len, ".exe", 4);
478 fullname[len] = '\0';
482 ret = msvcrt_spawn(flags, fullname, args, envs);
491 /*********************************************************************
494 * Like on Windows, this function does not handle arguments with spaces
497 MSVCRT_intptr_t _spawnv(int flags, const char* name, const char* const* argv)
499 return _spawnve(flags, name, argv, NULL);
502 /*********************************************************************
503 * _spawnvpe (MSVCRT.@)
505 * Like on Windows, this function does not handle arguments with spaces
508 MSVCRT_intptr_t _spawnvpe(int flags, const char* name, const char* const* argv,
509 const char* const* envv)
511 char fullname[MAX_PATH];
512 _searchenv(name, "PATH", fullname);
513 return _spawnve(flags, fullname[0] ? fullname : name, argv, envv);
516 /*********************************************************************
517 * _spawnvp (MSVCRT.@)
519 * Like on Windows, this function does not handle arguments with spaces
522 MSVCRT_intptr_t _spawnvp(int flags, const char* name, const char* const* argv)
524 return _spawnvpe(flags, name, argv, NULL);
527 /*********************************************************************
529 * FIXME: convert to _wpopen and call that from here instead? But it
530 * would have to convert the command back to ANSI to call msvcrt_spawn,
533 MSVCRT_FILE* MSVCRT__popen(const char* command, const char* mode)
535 static const char wcmd[] = "wcmd", cmdFlag[] = " /C ", comSpec[] = "COMSPEC";
537 BOOL readPipe = TRUE;
538 int textmode, fds[2], fdToDup, fdToOpen, fdStdHandle = -1, fdStdErr = -1;
543 TRACE("(command=%s, mode=%s)\n", debugstr_a(command), debugstr_a(mode));
545 if (!command || !mode)
548 textmode = *__p__fmode() & (MSVCRT__O_BINARY | MSVCRT__O_TEXT);
549 for (p = mode; *p; p++)
559 textmode |= MSVCRT__O_BINARY;
560 textmode &= ~MSVCRT__O_TEXT;
564 textmode |= MSVCRT__O_TEXT;
565 textmode &= ~MSVCRT__O_BINARY;
569 if (_pipe(fds, 0, textmode) == -1)
572 fdToDup = readPipe ? 1 : 0;
573 fdToOpen = readPipe ? 0 : 1;
575 if ((fdStdHandle = _dup(fdToDup)) == -1)
577 if (_dup2(fds[fdToDup], fdToDup) != 0)
581 if ((fdStdErr = _dup(MSVCRT_STDERR_FILENO)) == -1)
583 if (_dup2(fds[fdToDup], MSVCRT_STDERR_FILENO) != 0)
587 _close(fds[fdToDup]);
589 comSpecLen = GetEnvironmentVariableA(comSpec, NULL, 0);
591 comSpecLen = strlen(wcmd) + 1;
592 cmdcopy = HeapAlloc(GetProcessHeap(), 0, comSpecLen + strlen(cmdFlag)
594 if (!GetEnvironmentVariableA(comSpec, cmdcopy, comSpecLen))
595 strcpy(cmdcopy, wcmd);
596 strcat(cmdcopy, cmdFlag);
597 strcat(cmdcopy, command);
598 if (msvcrt_spawn(MSVCRT__P_NOWAIT, NULL, cmdcopy, NULL) == -1)
600 _close(fds[fdToOpen]);
605 ret = MSVCRT__fdopen(fds[fdToOpen], mode);
607 _close(fds[fdToOpen]);
609 HeapFree(GetProcessHeap(), 0, cmdcopy);
610 _dup2(fdStdHandle, fdToDup);
614 _dup2(fdStdErr, MSVCRT_STDERR_FILENO);
620 if (fdStdHandle != -1) _close(fdStdHandle);
621 if (fdStdErr != -1) _close(fdStdErr);
627 /*********************************************************************
630 MSVCRT_FILE* MSVCRT__wpopen(const MSVCRT_wchar_t* command, const MSVCRT_wchar_t* mode)
632 FIXME("(command=%s, mode=%s): stub\n", debugstr_w(command), debugstr_w(mode));
636 /*********************************************************************
639 int MSVCRT__pclose(MSVCRT_FILE* file)
641 return MSVCRT_fclose(file);
644 /*********************************************************************
647 int MSVCRT_system(const char* cmd)
652 /* Make a writable copy for CreateProcess */
653 cmdcopy=_strdup(cmd);
654 /* FIXME: should probably launch cmd interpreter in COMSPEC */
655 res=msvcrt_spawn(MSVCRT__P_WAIT, NULL, cmdcopy, NULL);
656 MSVCRT_free(cmdcopy);
660 /*********************************************************************
661 * _loaddll (MSVCRT.@)
663 MSVCRT_intptr_t _loaddll(const char* dllname)
665 return (MSVCRT_intptr_t)LoadLibraryA(dllname);
668 /*********************************************************************
669 * _unloaddll (MSVCRT.@)
671 int _unloaddll(MSVCRT_intptr_t dll)
673 if (FreeLibrary((HMODULE)dll))
677 int err = GetLastError();
678 msvcrt_set_errno(err);
683 /*********************************************************************
684 * _getdllprocaddr (MSVCRT.@)
686 void *_getdllprocaddr(MSVCRT_intptr_t dll, const char *name, int ordinal)
690 if (ordinal != -1) return NULL;
691 return GetProcAddress( (HMODULE)dll, name );
693 if (HIWORD(ordinal)) return NULL;
694 return GetProcAddress( (HMODULE)dll, (LPCSTR)(ULONG_PTR)ordinal );