Commit | Line | Data |
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8c012929 GV |
1 | /* Proxy shell designed for use with Emacs on Windows 95 and NT. |
2 | Copyright (C) 1997 Free Software Foundation, Inc. | |
3 | ||
4 | Accepts subset of Unix sh(1) command-line options, for compatability | |
5 | with elisp code written for Unix. When possible, executes external | |
6 | programs directly (a common use of /bin/sh by Emacs), otherwise | |
7 | invokes the user-specified command processor to handle built-in shell | |
8 | commands, batch files and interactive mode. | |
9 | ||
10 | The main function is simply to process the "-c string" option in the | |
11 | way /bin/sh does, since the standard Windows command shells use the | |
12 | convention that everything after "/c" (the Windows equivalent of | |
13 | "-c") is the input string. | |
14 | ||
15 | This file is part of GNU Emacs. | |
16 | ||
17 | GNU Emacs is free software; you can redistribute it and/or modify | |
18 | it under the terms of the GNU General Public License as published by | |
19 | the Free Software Foundation; either version 2, or (at your option) | |
20 | any later version. | |
21 | ||
22 | GNU Emacs is distributed in the hope that it will be useful, | |
23 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
24 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
25 | GNU General Public License for more details. | |
26 | ||
27 | You should have received a copy of the GNU General Public License | |
28 | along with GNU Emacs; see the file COPYING. If not, write to | |
29 | the Free Software Foundation, Inc., 59 Temple Place - Suite 330, | |
30 | Boston, MA 02111-1307, USA. */ | |
31 | ||
32 | #include <windows.h> | |
33 | ||
34 | #include <stdarg.h> /* va_args */ | |
35 | #include <malloc.h> /* alloca */ | |
36 | #include <stdlib.h> /* getenv */ | |
37 | #include <string.h> /* strlen */ | |
38 | ||
39 | ||
40 | /******* Mock C library routines *********************************/ | |
41 | ||
42 | /* These routines are used primarily to minimize the executable size. */ | |
43 | ||
44 | #define stdin GetStdHandle (STD_INPUT_HANDLE) | |
45 | #define stdout GetStdHandle (STD_OUTPUT_HANDLE) | |
46 | #define stderr GetStdHandle (STD_ERROR_HANDLE) | |
47 | ||
48 | int | |
49 | vfprintf(HANDLE hnd, char * msg, va_list args) | |
50 | { | |
51 | DWORD bytes_written; | |
52 | char buf[1024]; | |
53 | ||
54 | wvsprintf (buf, msg, args); | |
55 | return WriteFile (hnd, buf, strlen (buf), &bytes_written, NULL); | |
56 | } | |
57 | ||
58 | int | |
59 | fprintf(HANDLE hnd, char * msg, ...) | |
60 | { | |
61 | va_list args; | |
62 | int rc; | |
63 | ||
64 | va_start (args, msg); | |
65 | rc = vfprintf (hnd, msg, args); | |
66 | va_end (args); | |
67 | ||
68 | return rc; | |
69 | } | |
70 | ||
71 | int | |
72 | printf(char * msg, ...) | |
73 | { | |
74 | va_list args; | |
75 | int rc; | |
76 | ||
77 | va_start (args, msg); | |
78 | rc = vfprintf (stdout, msg, args); | |
79 | va_end (args); | |
80 | ||
81 | return rc; | |
82 | } | |
83 | ||
84 | void | |
85 | fail (char * msg, ...) | |
86 | { | |
87 | va_list args; | |
88 | ||
89 | va_start (args, msg); | |
90 | vfprintf (stderr, msg, args); | |
91 | va_end (args); | |
92 | ||
93 | exit (1); | |
94 | } | |
95 | ||
96 | void | |
97 | warn (char * msg, ...) | |
98 | { | |
99 | va_list args; | |
100 | ||
101 | va_start (args, msg); | |
102 | vfprintf (stderr, msg, args); | |
103 | va_end (args); | |
104 | } | |
105 | ||
106 | /******************************************************************/ | |
107 | ||
108 | char * | |
109 | canon_filename (char *fname) | |
110 | { | |
111 | char *p = fname; | |
112 | ||
113 | while (*p) | |
114 | { | |
115 | if (*p == '/') | |
116 | *p = '\\'; | |
117 | p++; | |
118 | } | |
119 | ||
120 | return fname; | |
121 | } | |
122 | ||
123 | char * | |
124 | skip_space (char *str) | |
125 | { | |
126 | while (isspace (*str)) str++; | |
127 | return str; | |
128 | } | |
129 | ||
130 | char * | |
131 | skip_nonspace (char *str) | |
132 | { | |
133 | while (*str && !isspace (*str)) str++; | |
134 | return str; | |
135 | } | |
136 | ||
137 | int escape_char = '\\'; | |
138 | ||
139 | /* Get next token from input, advancing pointer. */ | |
140 | int | |
141 | get_next_token (char * buf, char ** pSrc) | |
142 | { | |
143 | char * p = *pSrc; | |
144 | char * o = buf; | |
145 | ||
146 | p = skip_space (p); | |
147 | if (*p == '"') | |
148 | { | |
149 | int escape_char_run = 0; | |
150 | ||
151 | /* Go through src until an ending quote is found, unescaping | |
152 | quotes along the way. If the escape char is not quote, then do | |
153 | special handling of multiple escape chars preceding a quote | |
154 | char (ie. the reverse of what Emacs does to escape quotes). */ | |
155 | p++; | |
156 | while (1) | |
157 | { | |
158 | if (p[0] == escape_char && escape_char != '"') | |
159 | { | |
160 | escape_char_run++; | |
161 | continue; | |
162 | } | |
163 | else if (p[0] == '"') | |
164 | { | |
165 | while (escape_char_run > 1) | |
166 | { | |
167 | *o++ = escape_char; | |
168 | escape_char_run -= 2; | |
169 | } | |
170 | ||
171 | if (escape_char_run > 0) | |
172 | { | |
173 | /* escaped quote */ | |
174 | *o++ = *p++; | |
175 | escape_char_run = 0; | |
176 | } | |
177 | else if (p[1] == escape_char && escape_char == '"') | |
178 | { | |
179 | /* quote escaped by doubling */ | |
180 | *o++ = *p; | |
181 | p += 2; | |
182 | } | |
183 | else | |
184 | { | |
185 | /* The ending quote. */ | |
186 | *o = '\0'; | |
187 | /* Leave input pointer after token. */ | |
188 | p++; | |
189 | break; | |
190 | } | |
191 | } | |
192 | else if (p[0] == '\0') | |
193 | { | |
194 | /* End of string, but no ending quote found. We might want to | |
195 | flag this as an error, but for now will consider the end as | |
196 | the end of the token. */ | |
197 | *o = '\0'; | |
198 | break; | |
199 | } | |
200 | else | |
201 | { | |
202 | *o++ = *p++; | |
203 | } | |
204 | } | |
205 | } | |
206 | else | |
207 | { | |
208 | /* Next token is delimited by whitespace. */ | |
209 | char * p1 = skip_nonspace (p); | |
210 | memcpy (o, p, p1 - p); | |
211 | o += (p1 - p); | |
baf7eeb5 | 212 | *o = '\0'; |
8c012929 GV |
213 | p = p1; |
214 | } | |
215 | ||
216 | *pSrc = p; | |
217 | ||
218 | return o - buf; | |
219 | } | |
220 | ||
221 | /* Search for EXEC file in DIR. If EXEC does not have an extension, | |
222 | DIR is searched for EXEC with the standard extensions appended. */ | |
223 | int | |
224 | search_dir (char *dir, char *exec, int bufsize, char *buffer) | |
225 | { | |
226 | char *exts[] = {".bat", ".cmd", ".exe", ".com"}; | |
227 | int n_exts = sizeof (exts) / sizeof (char *); | |
228 | char *dummy; | |
229 | int i, rc; | |
230 | ||
231 | /* Search the directory for the program. */ | |
232 | for (i = 0; i < n_exts; i++) | |
233 | { | |
234 | rc = SearchPath (dir, exec, exts[i], bufsize, buffer, &dummy); | |
235 | if (rc > 0) | |
236 | return rc; | |
237 | } | |
238 | ||
239 | return 0; | |
240 | } | |
241 | ||
242 | /* Return the absolute name of executable file PROG, including | |
243 | any file extensions. If an absolute name for PROG cannot be found, | |
244 | return NULL. */ | |
245 | char * | |
246 | make_absolute (char *prog) | |
247 | { | |
248 | char absname[MAX_PATH]; | |
249 | char dir[MAX_PATH]; | |
250 | char curdir[MAX_PATH]; | |
251 | char *p, *fname; | |
252 | char *path; | |
253 | int i; | |
254 | ||
255 | /* At least partial absolute path specified; search there. */ | |
256 | if ((isalpha (prog[0]) && prog[1] == ':') || | |
257 | (prog[0] == '\\')) | |
258 | { | |
259 | /* Split the directory from the filename. */ | |
260 | fname = strrchr (prog, '\\'); | |
261 | if (!fname) | |
262 | /* Only a drive specifier is given. */ | |
263 | fname = prog + 2; | |
264 | strncpy (dir, prog, fname - prog); | |
265 | dir[fname - prog] = '\0'; | |
266 | ||
267 | /* Search the directory for the program. */ | |
268 | if (search_dir (dir, prog, MAX_PATH, absname) > 0) | |
269 | return strdup (absname); | |
270 | else | |
271 | return NULL; | |
272 | } | |
273 | ||
274 | if (GetCurrentDirectory (MAX_PATH, curdir) <= 0) | |
275 | return NULL; | |
276 | ||
277 | /* Relative path; search in current dir. */ | |
278 | if (strpbrk (prog, "\\")) | |
279 | { | |
280 | if (search_dir (curdir, prog, MAX_PATH, absname) > 0) | |
281 | return strdup (absname); | |
282 | else | |
283 | return NULL; | |
284 | } | |
285 | ||
286 | /* Just filename; search current directory then PATH. */ | |
287 | path = alloca (strlen (getenv ("PATH")) + strlen (curdir) + 2); | |
288 | strcpy (path, curdir); | |
289 | strcat (path, ";"); | |
290 | strcat (path, getenv ("PATH")); | |
291 | ||
292 | while (*path) | |
293 | { | |
294 | /* Get next directory from path. */ | |
295 | p = path; | |
296 | while (*p && *p != ';') p++; | |
297 | strncpy (dir, path, p - path); | |
298 | dir[p - path] = '\0'; | |
299 | ||
300 | /* Search the directory for the program. */ | |
301 | if (search_dir (dir, prog, MAX_PATH, absname) > 0) | |
302 | return strdup (absname); | |
303 | ||
304 | /* Move to the next directory. */ | |
305 | path = p + 1; | |
306 | } | |
307 | ||
308 | return NULL; | |
309 | } | |
310 | ||
311 | /*****************************************************************/ | |
312 | ||
313 | #if 0 | |
314 | char ** _argv; | |
315 | int _argc; | |
316 | ||
317 | /* Parse commandline into argv array, allowing proper quoting of args. */ | |
318 | void | |
319 | setup_argv (void) | |
320 | { | |
321 | char * cmdline = GetCommandLine (); | |
322 | int arg_bytes = 0; | |
323 | ||
324 | ||
325 | } | |
326 | #endif | |
327 | ||
328 | /* Information about child proc is global, to allow for automatic | |
329 | termination when interrupted. At the moment, only one child process | |
330 | can be running at any one time. */ | |
331 | ||
332 | PROCESS_INFORMATION child; | |
333 | int interactive = TRUE; | |
334 | ||
335 | BOOL | |
336 | console_event_handler (DWORD event) | |
337 | { | |
338 | switch (event) | |
339 | { | |
340 | case CTRL_C_EVENT: | |
341 | case CTRL_BREAK_EVENT: | |
342 | if (!interactive) | |
343 | { | |
344 | /* Both command.com and cmd.exe have the annoying behaviour of | |
345 | prompting "Terminate batch job (y/n)?" when interrupted | |
346 | while running a batch file, even if running in | |
347 | non-interactive (-c) mode. Try to make up for this | |
348 | deficiency by forcibly terminating the subprocess if | |
349 | running non-interactively. */ | |
350 | if (child.hProcess && | |
351 | WaitForSingleObject (child.hProcess, 500) != WAIT_OBJECT_0) | |
352 | TerminateProcess (child.hProcess, 0); | |
353 | exit (STATUS_CONTROL_C_EXIT); | |
354 | } | |
355 | break; | |
356 | ||
357 | #if 0 | |
358 | default: | |
359 | /* CLOSE, LOGOFF and SHUTDOWN events - actually we don't get these | |
360 | under Windows 95. */ | |
361 | fail ("cmdproxy: received %d event\n", event); | |
362 | if (child.hProcess) | |
363 | TerminateProcess (child.hProcess, 0); | |
364 | #endif | |
365 | } | |
366 | return TRUE; | |
367 | } | |
368 | ||
369 | int | |
370 | spawn (char * progname, char * cmdline) | |
371 | { | |
372 | DWORD rc = 0xff; | |
373 | SECURITY_ATTRIBUTES sec_attrs; | |
374 | STARTUPINFO start; | |
baf7eeb5 | 375 | char * envblock = GetEnvironmentStrings (); |
8c012929 GV |
376 | |
377 | sec_attrs.nLength = sizeof (sec_attrs); | |
378 | sec_attrs.lpSecurityDescriptor = NULL; | |
379 | sec_attrs.bInheritHandle = FALSE; | |
380 | ||
381 | memset (&start, 0, sizeof (start)); | |
382 | start.cb = sizeof (start); | |
383 | ||
384 | if (CreateProcess (progname, cmdline, &sec_attrs, NULL, TRUE, | |
baf7eeb5 | 385 | 0, envblock, NULL, &start, &child)) |
8c012929 GV |
386 | { |
387 | /* wait for completion and pass on return code */ | |
388 | WaitForSingleObject (child.hProcess, INFINITE); | |
389 | GetExitCodeProcess (child.hProcess, &rc); | |
390 | CloseHandle (child.hThread); | |
391 | CloseHandle (child.hProcess); | |
392 | child.hProcess = NULL; | |
393 | } | |
394 | ||
baf7eeb5 GV |
395 | FreeEnvironmentStrings (envblock); |
396 | ||
8c012929 GV |
397 | return (int) rc; |
398 | } | |
399 | ||
baf7eeb5 GV |
400 | /* Return size of current environment block. */ |
401 | int | |
402 | get_env_size () | |
403 | { | |
404 | char * start = GetEnvironmentStrings (); | |
405 | char * tmp = start; | |
406 | ||
407 | while (tmp[0] || tmp[1]) | |
408 | ++tmp; | |
409 | FreeEnvironmentStrings (start); | |
410 | return tmp + 2 - start; | |
411 | } | |
412 | ||
8c012929 GV |
413 | /******* Main program ********************************************/ |
414 | ||
415 | int | |
416 | main (int argc, char ** argv) | |
417 | { | |
418 | int rc; | |
419 | int need_shell; | |
420 | char * cmdline; | |
421 | char * progname; | |
422 | int envsize; | |
baf7eeb5 GV |
423 | char **pass_through_args; |
424 | int num_pass_through_args; | |
8c012929 GV |
425 | char modname[MAX_PATH]; |
426 | char path[MAX_PATH]; | |
427 | ||
428 | ||
429 | interactive = TRUE; | |
430 | ||
431 | SetConsoleCtrlHandler ((PHANDLER_ROUTINE) console_event_handler, TRUE); | |
432 | ||
433 | /* We serve double duty: we can be called either as a proxy for the | |
434 | real shell (that is, because we are defined to be the user shell), | |
435 | or in our role as a helper application for running DOS programs. | |
436 | In the former case, we interpret the command line options as if we | |
437 | were a Unix shell, but in the latter case we simply pass our | |
438 | command line to CreateProcess. We know which case we are dealing | |
439 | with by whether argv[0] refers to ourself or to some other program. | |
440 | (This relies on an arcane feature of CreateProcess, where we can | |
441 | specify cmdproxy as the module to run, but specify a different | |
442 | program in the command line - the MSVC startup code sets argv[0] | |
443 | from the command line.) */ | |
444 | ||
445 | if (!GetModuleFileName (NULL, modname, sizeof (modname))) | |
baf7eeb5 | 446 | fail ("error: GetModuleFileName failed\n"); |
8c012929 GV |
447 | |
448 | /* Although Emacs always sets argv[0] to an absolute pathname, we | |
449 | might get run in other ways as well, so convert argv[0] to an | |
450 | absolute name before comparing to the module name. */ | |
451 | if (!SearchPath (NULL, argv[0], ".exe", sizeof (path), path, &progname) | |
452 | || stricmp (modname, path) != 0) | |
453 | { | |
454 | /* We are being used as a helper to run a DOS app; just pass | |
455 | command line to DOS app without change. */ | |
456 | /* TODO: fill in progname. */ | |
457 | return spawn (NULL, GetCommandLine ()); | |
458 | } | |
459 | ||
460 | /* Process command line. If running interactively (-c or /c not | |
461 | specified) then spawn a real command shell, passing it the command | |
462 | line arguments. | |
463 | ||
464 | If not running interactively, then attempt to execute the specified | |
465 | command directly. If necessary, spawn a real shell to execute the | |
466 | command. | |
467 | ||
468 | */ | |
469 | ||
470 | progname = NULL; | |
471 | cmdline = NULL; | |
472 | /* If no args, spawn real shell for interactive use. */ | |
473 | need_shell = TRUE; | |
474 | interactive = TRUE; | |
baf7eeb5 GV |
475 | /* Ask command.com to create an environment block with a reasonable |
476 | amount of free space. */ | |
477 | envsize = get_env_size () + 300; | |
478 | pass_through_args = (char **) alloca (argc * sizeof(char *)); | |
479 | num_pass_through_args = 0; | |
8c012929 GV |
480 | |
481 | while (--argc > 0) | |
482 | { | |
483 | ++argv; | |
baf7eeb5 GV |
484 | /* Act on switches we recognize (mostly single letter switches, |
485 | except for -e); all unrecognised switches and extra args are | |
486 | passed on to real shell if used (only really of benefit for | |
487 | interactive use, but allow for batch use as well). Accept / as | |
8c012929 | 488 | switch char for compatability with cmd.exe. */ |
baf7eeb5 | 489 | if ( ((*argv)[0] == '-' || (*argv)[0] == '/') && (*argv)[1] != '\0' ) |
8c012929 GV |
490 | { |
491 | if ( ((*argv)[1] == 'c') && ((*argv)[2] == '\0') ) | |
492 | { | |
493 | if (--argc == 0) | |
baf7eeb5 | 494 | fail ("error: expecting arg for %s\n", *argv); |
8c012929 GV |
495 | cmdline = *(++argv); |
496 | interactive = FALSE; | |
497 | } | |
498 | else if ( ((*argv)[1] == 'i') && ((*argv)[2] == '\0') ) | |
499 | { | |
500 | if (cmdline) | |
baf7eeb5 | 501 | warn ("warning: %s ignored because of -c\n", *argv); |
8c012929 GV |
502 | } |
503 | else if ( ((*argv)[1] == 'e') && ((*argv)[2] == ':') ) | |
504 | { | |
baf7eeb5 GV |
505 | int requested_envsize = atoi (*argv + 3); |
506 | /* Enforce a reasonable minimum size, as above. */ | |
507 | if (requested_envsize > envsize) | |
508 | envsize = requested_envsize; | |
509 | /* For sanity, enforce a reasonable maximum. */ | |
510 | if (envsize > 32768) | |
511 | envsize = 32768; | |
8c012929 GV |
512 | } |
513 | else | |
514 | { | |
baf7eeb5 GV |
515 | /* warn ("warning: unknown option %s ignored", *argv); */ |
516 | pass_through_args[num_pass_through_args++] = *argv; | |
8c012929 GV |
517 | } |
518 | } | |
519 | else | |
520 | break; | |
521 | } | |
522 | ||
baf7eeb5 GV |
523 | #if 0 |
524 | /* I think this is probably not useful - cmd.exe ignores extra | |
525 | (non-switch) args in interactive mode, and they cannot be passed on | |
526 | when -c was given. */ | |
527 | ||
528 | /* Collect any remaining args after (initial) switches. */ | |
529 | while (argc-- > 0) | |
530 | { | |
531 | pass_through_args[num_pass_through_args++] = *argv++; | |
532 | } | |
533 | #else | |
534 | /* Probably a mistake for there to be extra args; not fatal. */ | |
535 | if (argc > 0) | |
536 | warn ("warning: extra args ignored after %s\n", argv[-1]); | |
537 | #endif | |
538 | ||
539 | pass_through_args[num_pass_through_args] = NULL; | |
540 | ||
8c012929 GV |
541 | /* If -c option, determine if we must spawn a real shell, or if we can |
542 | execute the command directly ourself. */ | |
543 | if (cmdline) | |
544 | { | |
545 | /* If no redirection or piping, and if program can be found, then | |
546 | run program directly. Otherwise invoke a real shell. */ | |
547 | ||
548 | static char copout_chars[] = "|<>&"; | |
549 | ||
550 | if (strpbrk (cmdline, copout_chars) == NULL) | |
551 | { | |
552 | char *args; | |
553 | ||
554 | /* The program name is the first token of cmdline. Since | |
555 | filenames cannot legally contain embedded quotes, the value | |
556 | of escape_char doesn't matter. */ | |
557 | args = cmdline; | |
558 | if (!get_next_token (path, &args)) | |
559 | fail ("error: no program name specified.\n"); | |
560 | ||
561 | canon_filename (path); | |
562 | progname = make_absolute (path); | |
563 | ||
564 | /* If we found the program, run it directly (if not found it | |
565 | might be an internal shell command, so don't fail). */ | |
566 | if (progname != NULL) | |
567 | need_shell = FALSE; | |
568 | } | |
569 | } | |
570 | ||
571 | if (need_shell) | |
572 | { | |
573 | char * p; | |
baf7eeb5 | 574 | int extra_arg_space = 0; |
8c012929 GV |
575 | |
576 | progname = getenv ("COMSPEC"); | |
577 | if (!progname) | |
baf7eeb5 | 578 | fail ("error: COMSPEC is not set\n"); |
8c012929 GV |
579 | |
580 | canon_filename (progname); | |
581 | progname = make_absolute (progname); | |
582 | ||
583 | if (progname == NULL || strchr (progname, '\\') == NULL) | |
baf7eeb5 GV |
584 | fail ("error: the program %s could not be found.\n", getenv ("COMSPEC")); |
585 | ||
586 | /* Work out how much extra space is required for | |
587 | pass_through_args. */ | |
588 | for (argv = pass_through_args; *argv != NULL; ++argv) | |
589 | /* We don't expect to have to quote switches. */ | |
590 | extra_arg_space += strlen (*argv) + 2; | |
8c012929 GV |
591 | |
592 | if (cmdline) | |
593 | { | |
baf7eeb5 GV |
594 | char * buf; |
595 | ||
8c012929 GV |
596 | /* Convert to syntax expected by cmd.exe/command.com for |
597 | running non-interactively. Always quote program name in | |
598 | case path contains spaces (fortunately it can't contain | |
599 | quotes, since they are illegal in path names). */ | |
baf7eeb5 GV |
600 | |
601 | buf = p = alloca (strlen (progname) + extra_arg_space + | |
602 | strlen (cmdline) + 16); | |
603 | ||
604 | /* Quote progname in case it contains spaces. */ | |
605 | p += wsprintf (p, "\"%s\"", progname); | |
606 | ||
607 | /* Include pass_through_args verbatim; these are just switches | |
608 | so should not need quoting. */ | |
609 | for (argv = pass_through_args; *argv != NULL; ++argv) | |
610 | p += wsprintf (p, " %s", *argv); | |
611 | ||
612 | /* Always set environment size to something reasonable. */ | |
613 | wsprintf(p, " /e:%d /c %s", envsize, cmdline); | |
614 | cmdline = buf; | |
8c012929 GV |
615 | } |
616 | else | |
617 | { | |
618 | /* Provide dir arg expected by command.com when first started | |
619 | interactively (the "command search path"). cmd.exe does | |
620 | not require it, but accepts it silently - presumably other | |
621 | DOS compatible shells do the same. To avoid potential | |
622 | problems with spaces in command dir (which cannot be quoted | |
623 | - command.com doesn't like it), we always use the 8.3 form. */ | |
624 | GetShortPathName (progname, path, sizeof (path)); | |
625 | p = strrchr (path, '\\'); | |
baf7eeb5 GV |
626 | /* Trailing slash is acceptable, so always leave it. */ |
627 | *(++p) = '\0'; | |
8c012929 | 628 | |
baf7eeb5 GV |
629 | cmdline = p = alloca (strlen (progname) + extra_arg_space + |
630 | strlen (path) + 13); | |
8c012929 GV |
631 | |
632 | /* Quote progname in case it contains spaces. */ | |
baf7eeb5 GV |
633 | p += wsprintf (p, "\"%s\" %s", progname, path); |
634 | ||
635 | /* Include pass_through_args verbatim; these are just switches | |
636 | so should not need quoting. */ | |
637 | for (argv = pass_through_args; *argv != NULL; ++argv) | |
638 | p += wsprintf (p, " %s", *argv); | |
639 | ||
640 | /* Always set environment size to something reasonable - again | |
641 | cmd.exe ignores this silently. */ | |
642 | wsprintf (p, " /e:%d", envsize); | |
8c012929 GV |
643 | } |
644 | } | |
645 | ||
646 | if (!progname) | |
647 | fail ("Internal error: program name not defined\n"); | |
648 | ||
649 | if (!cmdline) | |
650 | cmdline = progname; | |
651 | ||
652 | rc = spawn (progname, cmdline); | |
653 | ||
654 | return rc; | |
655 | } |