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 | ||
52969220 | 93 | exit (-1); |
8c012929 GV |
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++; | |
2afff93a | 161 | p++; |
8c012929 GV |
162 | continue; |
163 | } | |
164 | else if (p[0] == '"') | |
165 | { | |
166 | while (escape_char_run > 1) | |
167 | { | |
168 | *o++ = escape_char; | |
169 | escape_char_run -= 2; | |
170 | } | |
171 | ||
172 | if (escape_char_run > 0) | |
173 | { | |
174 | /* escaped quote */ | |
175 | *o++ = *p++; | |
176 | escape_char_run = 0; | |
177 | } | |
178 | else if (p[1] == escape_char && escape_char == '"') | |
179 | { | |
180 | /* quote escaped by doubling */ | |
181 | *o++ = *p; | |
182 | p += 2; | |
183 | } | |
184 | else | |
185 | { | |
186 | /* The ending quote. */ | |
187 | *o = '\0'; | |
188 | /* Leave input pointer after token. */ | |
189 | p++; | |
190 | break; | |
191 | } | |
192 | } | |
193 | else if (p[0] == '\0') | |
194 | { | |
195 | /* End of string, but no ending quote found. We might want to | |
196 | flag this as an error, but for now will consider the end as | |
197 | the end of the token. */ | |
198 | *o = '\0'; | |
199 | break; | |
200 | } | |
201 | else | |
202 | { | |
203 | *o++ = *p++; | |
204 | } | |
205 | } | |
206 | } | |
207 | else | |
208 | { | |
209 | /* Next token is delimited by whitespace. */ | |
210 | char * p1 = skip_nonspace (p); | |
211 | memcpy (o, p, p1 - p); | |
212 | o += (p1 - p); | |
baf7eeb5 | 213 | *o = '\0'; |
8c012929 GV |
214 | p = p1; |
215 | } | |
216 | ||
217 | *pSrc = p; | |
218 | ||
219 | return o - buf; | |
220 | } | |
221 | ||
222 | /* Search for EXEC file in DIR. If EXEC does not have an extension, | |
223 | DIR is searched for EXEC with the standard extensions appended. */ | |
224 | int | |
225 | search_dir (char *dir, char *exec, int bufsize, char *buffer) | |
226 | { | |
227 | char *exts[] = {".bat", ".cmd", ".exe", ".com"}; | |
228 | int n_exts = sizeof (exts) / sizeof (char *); | |
229 | char *dummy; | |
230 | int i, rc; | |
231 | ||
232 | /* Search the directory for the program. */ | |
233 | for (i = 0; i < n_exts; i++) | |
234 | { | |
235 | rc = SearchPath (dir, exec, exts[i], bufsize, buffer, &dummy); | |
236 | if (rc > 0) | |
237 | return rc; | |
238 | } | |
239 | ||
240 | return 0; | |
241 | } | |
242 | ||
243 | /* Return the absolute name of executable file PROG, including | |
244 | any file extensions. If an absolute name for PROG cannot be found, | |
245 | return NULL. */ | |
246 | char * | |
247 | make_absolute (char *prog) | |
248 | { | |
249 | char absname[MAX_PATH]; | |
250 | char dir[MAX_PATH]; | |
251 | char curdir[MAX_PATH]; | |
252 | char *p, *fname; | |
253 | char *path; | |
254 | int i; | |
255 | ||
256 | /* At least partial absolute path specified; search there. */ | |
257 | if ((isalpha (prog[0]) && prog[1] == ':') || | |
258 | (prog[0] == '\\')) | |
259 | { | |
260 | /* Split the directory from the filename. */ | |
261 | fname = strrchr (prog, '\\'); | |
262 | if (!fname) | |
263 | /* Only a drive specifier is given. */ | |
264 | fname = prog + 2; | |
265 | strncpy (dir, prog, fname - prog); | |
266 | dir[fname - prog] = '\0'; | |
267 | ||
268 | /* Search the directory for the program. */ | |
269 | if (search_dir (dir, prog, MAX_PATH, absname) > 0) | |
270 | return strdup (absname); | |
271 | else | |
272 | return NULL; | |
273 | } | |
274 | ||
275 | if (GetCurrentDirectory (MAX_PATH, curdir) <= 0) | |
276 | return NULL; | |
277 | ||
278 | /* Relative path; search in current dir. */ | |
279 | if (strpbrk (prog, "\\")) | |
280 | { | |
281 | if (search_dir (curdir, prog, MAX_PATH, absname) > 0) | |
282 | return strdup (absname); | |
283 | else | |
284 | return NULL; | |
285 | } | |
286 | ||
287 | /* Just filename; search current directory then PATH. */ | |
288 | path = alloca (strlen (getenv ("PATH")) + strlen (curdir) + 2); | |
289 | strcpy (path, curdir); | |
290 | strcat (path, ";"); | |
291 | strcat (path, getenv ("PATH")); | |
292 | ||
293 | while (*path) | |
294 | { | |
295 | /* Get next directory from path. */ | |
296 | p = path; | |
297 | while (*p && *p != ';') p++; | |
298 | strncpy (dir, path, p - path); | |
299 | dir[p - path] = '\0'; | |
300 | ||
301 | /* Search the directory for the program. */ | |
302 | if (search_dir (dir, prog, MAX_PATH, absname) > 0) | |
303 | return strdup (absname); | |
304 | ||
305 | /* Move to the next directory. */ | |
306 | path = p + 1; | |
307 | } | |
308 | ||
309 | return NULL; | |
310 | } | |
311 | ||
312 | /*****************************************************************/ | |
313 | ||
314 | #if 0 | |
315 | char ** _argv; | |
316 | int _argc; | |
317 | ||
318 | /* Parse commandline into argv array, allowing proper quoting of args. */ | |
319 | void | |
320 | setup_argv (void) | |
321 | { | |
322 | char * cmdline = GetCommandLine (); | |
323 | int arg_bytes = 0; | |
324 | ||
325 | ||
326 | } | |
327 | #endif | |
328 | ||
329 | /* Information about child proc is global, to allow for automatic | |
330 | termination when interrupted. At the moment, only one child process | |
331 | can be running at any one time. */ | |
332 | ||
333 | PROCESS_INFORMATION child; | |
334 | int interactive = TRUE; | |
335 | ||
336 | BOOL | |
337 | console_event_handler (DWORD event) | |
338 | { | |
339 | switch (event) | |
340 | { | |
341 | case CTRL_C_EVENT: | |
342 | case CTRL_BREAK_EVENT: | |
343 | if (!interactive) | |
344 | { | |
345 | /* Both command.com and cmd.exe have the annoying behaviour of | |
346 | prompting "Terminate batch job (y/n)?" when interrupted | |
347 | while running a batch file, even if running in | |
348 | non-interactive (-c) mode. Try to make up for this | |
349 | deficiency by forcibly terminating the subprocess if | |
350 | running non-interactively. */ | |
351 | if (child.hProcess && | |
352 | WaitForSingleObject (child.hProcess, 500) != WAIT_OBJECT_0) | |
353 | TerminateProcess (child.hProcess, 0); | |
354 | exit (STATUS_CONTROL_C_EXIT); | |
355 | } | |
356 | break; | |
357 | ||
358 | #if 0 | |
359 | default: | |
360 | /* CLOSE, LOGOFF and SHUTDOWN events - actually we don't get these | |
361 | under Windows 95. */ | |
362 | fail ("cmdproxy: received %d event\n", event); | |
363 | if (child.hProcess) | |
364 | TerminateProcess (child.hProcess, 0); | |
365 | #endif | |
366 | } | |
367 | return TRUE; | |
368 | } | |
369 | ||
52969220 GV |
370 | /* Change from normal usage; return value indicates whether spawn |
371 | succeeded or failed - program return code is returned separately. */ | |
8c012929 | 372 | int |
d78e84f7 | 373 | spawn (char * progname, char * cmdline, char * dir, int * retcode) |
8c012929 | 374 | { |
52969220 | 375 | BOOL success = FALSE; |
8c012929 GV |
376 | SECURITY_ATTRIBUTES sec_attrs; |
377 | STARTUPINFO start; | |
52969220 GV |
378 | /* In theory, passing NULL for the environment block to CreateProcess |
379 | is the same as passing the value of GetEnvironmentStrings, but | |
380 | doing this explicitly seems to cure problems running DOS programs | |
381 | in some cases. */ | |
baf7eeb5 | 382 | char * envblock = GetEnvironmentStrings (); |
8c012929 GV |
383 | |
384 | sec_attrs.nLength = sizeof (sec_attrs); | |
385 | sec_attrs.lpSecurityDescriptor = NULL; | |
386 | sec_attrs.bInheritHandle = FALSE; | |
387 | ||
388 | memset (&start, 0, sizeof (start)); | |
389 | start.cb = sizeof (start); | |
390 | ||
391 | if (CreateProcess (progname, cmdline, &sec_attrs, NULL, TRUE, | |
d78e84f7 | 392 | 0, envblock, dir, &start, &child)) |
8c012929 | 393 | { |
52969220 | 394 | success = TRUE; |
8c012929 GV |
395 | /* wait for completion and pass on return code */ |
396 | WaitForSingleObject (child.hProcess, INFINITE); | |
52969220 GV |
397 | if (retcode) |
398 | GetExitCodeProcess (child.hProcess, (DWORD *)retcode); | |
8c012929 GV |
399 | CloseHandle (child.hThread); |
400 | CloseHandle (child.hProcess); | |
401 | child.hProcess = NULL; | |
402 | } | |
403 | ||
baf7eeb5 GV |
404 | FreeEnvironmentStrings (envblock); |
405 | ||
52969220 | 406 | return success; |
8c012929 GV |
407 | } |
408 | ||
baf7eeb5 GV |
409 | /* Return size of current environment block. */ |
410 | int | |
411 | get_env_size () | |
412 | { | |
413 | char * start = GetEnvironmentStrings (); | |
414 | char * tmp = start; | |
415 | ||
416 | while (tmp[0] || tmp[1]) | |
417 | ++tmp; | |
418 | FreeEnvironmentStrings (start); | |
419 | return tmp + 2 - start; | |
420 | } | |
421 | ||
8c012929 GV |
422 | /******* Main program ********************************************/ |
423 | ||
424 | int | |
425 | main (int argc, char ** argv) | |
426 | { | |
427 | int rc; | |
428 | int need_shell; | |
429 | char * cmdline; | |
430 | char * progname; | |
431 | int envsize; | |
baf7eeb5 GV |
432 | char **pass_through_args; |
433 | int num_pass_through_args; | |
8c012929 GV |
434 | char modname[MAX_PATH]; |
435 | char path[MAX_PATH]; | |
d78e84f7 | 436 | char dir[MAX_PATH]; |
8c012929 GV |
437 | |
438 | ||
439 | interactive = TRUE; | |
440 | ||
441 | SetConsoleCtrlHandler ((PHANDLER_ROUTINE) console_event_handler, TRUE); | |
442 | ||
d78e84f7 AI |
443 | if (!GetCurrentDirectory (sizeof (dir), dir)) |
444 | fail ("error: GetCurrentDirectory failed\n"); | |
445 | ||
8c012929 GV |
446 | /* We serve double duty: we can be called either as a proxy for the |
447 | real shell (that is, because we are defined to be the user shell), | |
448 | or in our role as a helper application for running DOS programs. | |
449 | In the former case, we interpret the command line options as if we | |
450 | were a Unix shell, but in the latter case we simply pass our | |
451 | command line to CreateProcess. We know which case we are dealing | |
452 | with by whether argv[0] refers to ourself or to some other program. | |
453 | (This relies on an arcane feature of CreateProcess, where we can | |
454 | specify cmdproxy as the module to run, but specify a different | |
455 | program in the command line - the MSVC startup code sets argv[0] | |
456 | from the command line.) */ | |
457 | ||
458 | if (!GetModuleFileName (NULL, modname, sizeof (modname))) | |
baf7eeb5 | 459 | fail ("error: GetModuleFileName failed\n"); |
8c012929 | 460 | |
d78e84f7 AI |
461 | /* Change directory to location of .exe so startup directory can be |
462 | deleted. */ | |
463 | progname = strrchr (modname, '\\'); | |
464 | *progname = '\0'; | |
465 | SetCurrentDirectory (modname); | |
466 | *progname = '\\'; | |
467 | ||
8c012929 GV |
468 | /* Although Emacs always sets argv[0] to an absolute pathname, we |
469 | might get run in other ways as well, so convert argv[0] to an | |
a5e8ac59 AI |
470 | absolute name before comparing to the module name. Don't get |
471 | caught out by mixed short and long names. */ | |
472 | GetShortPathName (modname, modname, sizeof (modname)); | |
473 | path[0] = '\0'; | |
8c012929 | 474 | if (!SearchPath (NULL, argv[0], ".exe", sizeof (path), path, &progname) |
a5e8ac59 | 475 | || !GetShortPathName (path, path, sizeof (path)) |
8c012929 GV |
476 | || stricmp (modname, path) != 0) |
477 | { | |
478 | /* We are being used as a helper to run a DOS app; just pass | |
479 | command line to DOS app without change. */ | |
480 | /* TODO: fill in progname. */ | |
d78e84f7 | 481 | if (spawn (NULL, GetCommandLine (), dir, &rc)) |
52969220 GV |
482 | return rc; |
483 | fail ("Could not run %s\n", GetCommandLine ()); | |
8c012929 GV |
484 | } |
485 | ||
486 | /* Process command line. If running interactively (-c or /c not | |
487 | specified) then spawn a real command shell, passing it the command | |
488 | line arguments. | |
489 | ||
490 | If not running interactively, then attempt to execute the specified | |
491 | command directly. If necessary, spawn a real shell to execute the | |
492 | command. | |
493 | ||
494 | */ | |
495 | ||
496 | progname = NULL; | |
497 | cmdline = NULL; | |
498 | /* If no args, spawn real shell for interactive use. */ | |
499 | need_shell = TRUE; | |
500 | interactive = TRUE; | |
baf7eeb5 GV |
501 | /* Ask command.com to create an environment block with a reasonable |
502 | amount of free space. */ | |
503 | envsize = get_env_size () + 300; | |
504 | pass_through_args = (char **) alloca (argc * sizeof(char *)); | |
505 | num_pass_through_args = 0; | |
8c012929 GV |
506 | |
507 | while (--argc > 0) | |
508 | { | |
509 | ++argv; | |
baf7eeb5 GV |
510 | /* Act on switches we recognize (mostly single letter switches, |
511 | except for -e); all unrecognised switches and extra args are | |
512 | passed on to real shell if used (only really of benefit for | |
513 | interactive use, but allow for batch use as well). Accept / as | |
8c012929 | 514 | switch char for compatability with cmd.exe. */ |
1d7d10d1 | 515 | if (((*argv)[0] == '-' || (*argv)[0] == '/') && (*argv)[1] != '\0') |
8c012929 | 516 | { |
1d7d10d1 | 517 | if (((*argv)[1] == 'c' || (*argv)[1] == 'C') && ((*argv)[2] == '\0')) |
8c012929 GV |
518 | { |
519 | if (--argc == 0) | |
baf7eeb5 | 520 | fail ("error: expecting arg for %s\n", *argv); |
8c012929 GV |
521 | cmdline = *(++argv); |
522 | interactive = FALSE; | |
523 | } | |
1d7d10d1 | 524 | else if (((*argv)[1] == 'i' || (*argv)[1] == 'I') && ((*argv)[2] == '\0')) |
8c012929 GV |
525 | { |
526 | if (cmdline) | |
baf7eeb5 | 527 | warn ("warning: %s ignored because of -c\n", *argv); |
8c012929 | 528 | } |
f49f08cc | 529 | else if (((*argv)[1] == 'e' || (*argv)[1] == 'E') && ((*argv)[2] == ':')) |
8c012929 | 530 | { |
baf7eeb5 GV |
531 | int requested_envsize = atoi (*argv + 3); |
532 | /* Enforce a reasonable minimum size, as above. */ | |
533 | if (requested_envsize > envsize) | |
534 | envsize = requested_envsize; | |
535 | /* For sanity, enforce a reasonable maximum. */ | |
536 | if (envsize > 32768) | |
537 | envsize = 32768; | |
8c012929 GV |
538 | } |
539 | else | |
540 | { | |
baf7eeb5 GV |
541 | /* warn ("warning: unknown option %s ignored", *argv); */ |
542 | pass_through_args[num_pass_through_args++] = *argv; | |
8c012929 GV |
543 | } |
544 | } | |
545 | else | |
546 | break; | |
547 | } | |
548 | ||
baf7eeb5 GV |
549 | #if 0 |
550 | /* I think this is probably not useful - cmd.exe ignores extra | |
551 | (non-switch) args in interactive mode, and they cannot be passed on | |
552 | when -c was given. */ | |
553 | ||
554 | /* Collect any remaining args after (initial) switches. */ | |
555 | while (argc-- > 0) | |
556 | { | |
557 | pass_through_args[num_pass_through_args++] = *argv++; | |
558 | } | |
559 | #else | |
560 | /* Probably a mistake for there to be extra args; not fatal. */ | |
561 | if (argc > 0) | |
ec025f9d | 562 | warn ("warning: extra args ignored after '%s'\n", argv[-1]); |
baf7eeb5 GV |
563 | #endif |
564 | ||
565 | pass_through_args[num_pass_through_args] = NULL; | |
566 | ||
8c012929 GV |
567 | /* If -c option, determine if we must spawn a real shell, or if we can |
568 | execute the command directly ourself. */ | |
569 | if (cmdline) | |
570 | { | |
571 | /* If no redirection or piping, and if program can be found, then | |
572 | run program directly. Otherwise invoke a real shell. */ | |
573 | ||
574 | static char copout_chars[] = "|<>&"; | |
575 | ||
576 | if (strpbrk (cmdline, copout_chars) == NULL) | |
577 | { | |
578 | char *args; | |
579 | ||
580 | /* The program name is the first token of cmdline. Since | |
581 | filenames cannot legally contain embedded quotes, the value | |
582 | of escape_char doesn't matter. */ | |
583 | args = cmdline; | |
584 | if (!get_next_token (path, &args)) | |
585 | fail ("error: no program name specified.\n"); | |
586 | ||
587 | canon_filename (path); | |
588 | progname = make_absolute (path); | |
589 | ||
590 | /* If we found the program, run it directly (if not found it | |
591 | might be an internal shell command, so don't fail). */ | |
592 | if (progname != NULL) | |
593 | need_shell = FALSE; | |
594 | } | |
595 | } | |
596 | ||
ec025f9d | 597 | pass_to_shell: |
8c012929 GV |
598 | if (need_shell) |
599 | { | |
600 | char * p; | |
baf7eeb5 | 601 | int extra_arg_space = 0; |
8de1edce | 602 | int run_command_dot_com; |
8c012929 GV |
603 | |
604 | progname = getenv ("COMSPEC"); | |
605 | if (!progname) | |
baf7eeb5 | 606 | fail ("error: COMSPEC is not set\n"); |
8c012929 GV |
607 | |
608 | canon_filename (progname); | |
609 | progname = make_absolute (progname); | |
610 | ||
611 | if (progname == NULL || strchr (progname, '\\') == NULL) | |
baf7eeb5 GV |
612 | fail ("error: the program %s could not be found.\n", getenv ("COMSPEC")); |
613 | ||
8de1edce GV |
614 | /* Need to set environment size when running command.com. */ |
615 | run_command_dot_com = | |
616 | (stricmp (strrchr (progname, '\\'), "command.com") == 0); | |
617 | ||
baf7eeb5 GV |
618 | /* Work out how much extra space is required for |
619 | pass_through_args. */ | |
620 | for (argv = pass_through_args; *argv != NULL; ++argv) | |
621 | /* We don't expect to have to quote switches. */ | |
622 | extra_arg_space += strlen (*argv) + 2; | |
8c012929 GV |
623 | |
624 | if (cmdline) | |
625 | { | |
baf7eeb5 GV |
626 | char * buf; |
627 | ||
8c012929 GV |
628 | /* Convert to syntax expected by cmd.exe/command.com for |
629 | running non-interactively. Always quote program name in | |
630 | case path contains spaces (fortunately it can't contain | |
631 | quotes, since they are illegal in path names). */ | |
baf7eeb5 GV |
632 | |
633 | buf = p = alloca (strlen (progname) + extra_arg_space + | |
634 | strlen (cmdline) + 16); | |
635 | ||
636 | /* Quote progname in case it contains spaces. */ | |
637 | p += wsprintf (p, "\"%s\"", progname); | |
638 | ||
639 | /* Include pass_through_args verbatim; these are just switches | |
640 | so should not need quoting. */ | |
641 | for (argv = pass_through_args; *argv != NULL; ++argv) | |
642 | p += wsprintf (p, " %s", *argv); | |
643 | ||
8de1edce | 644 | if (run_command_dot_com) |
ec025f9d GV |
645 | wsprintf(p, " /e:%d /c %s", envsize, cmdline); |
646 | else | |
647 | wsprintf(p, " /c %s", cmdline); | |
baf7eeb5 | 648 | cmdline = buf; |
8c012929 GV |
649 | } |
650 | else | |
651 | { | |
8de1edce | 652 | if (run_command_dot_com) |
ec025f9d GV |
653 | { |
654 | /* Provide dir arg expected by command.com when first | |
8de1edce | 655 | started interactively (the "command search path"). To |
ec025f9d GV |
656 | avoid potential problems with spaces in command dir |
657 | (which cannot be quoted - command.com doesn't like it), | |
658 | we always use the 8.3 form. */ | |
659 | GetShortPathName (progname, path, sizeof (path)); | |
660 | p = strrchr (path, '\\'); | |
661 | /* Trailing slash is acceptable, so always leave it. */ | |
662 | *(++p) = '\0'; | |
663 | } | |
664 | else | |
ec025f9d | 665 | path[0] = '\0'; |
8c012929 | 666 | |
baf7eeb5 GV |
667 | cmdline = p = alloca (strlen (progname) + extra_arg_space + |
668 | strlen (path) + 13); | |
8c012929 GV |
669 | |
670 | /* Quote progname in case it contains spaces. */ | |
baf7eeb5 GV |
671 | p += wsprintf (p, "\"%s\" %s", progname, path); |
672 | ||
673 | /* Include pass_through_args verbatim; these are just switches | |
674 | so should not need quoting. */ | |
675 | for (argv = pass_through_args; *argv != NULL; ++argv) | |
676 | p += wsprintf (p, " %s", *argv); | |
677 | ||
8de1edce | 678 | if (run_command_dot_com) |
ec025f9d | 679 | wsprintf (p, " /e:%d", envsize); |
8c012929 GV |
680 | } |
681 | } | |
682 | ||
683 | if (!progname) | |
684 | fail ("Internal error: program name not defined\n"); | |
685 | ||
686 | if (!cmdline) | |
687 | cmdline = progname; | |
688 | ||
d78e84f7 | 689 | if (spawn (progname, cmdline, dir, &rc)) |
52969220 | 690 | return rc; |
8c012929 | 691 | |
52969220 GV |
692 | if (!need_shell) |
693 | { | |
694 | need_shell = TRUE; | |
695 | goto pass_to_shell; | |
696 | } | |
697 | ||
698 | fail ("Could not run %s\n", progname); | |
699 | ||
700 | return 0; | |
8c012929 | 701 | } |