Commit | Line | Data |
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8c012929 | 1 | /* Proxy shell designed for use with Emacs on Windows 95 and NT. |
eef0be9e GM |
2 | Copyright (C) 1997, 2001, 2002, 2003, 2004, 2005, 2006, 2007, |
3 | 2008 Free Software Foundation, Inc. | |
8c012929 | 4 | |
aecf7181 | 5 | Accepts subset of Unix sh(1) command-line options, for compatibility |
8c012929 GV |
6 | with elisp code written for Unix. When possible, executes external |
7 | programs directly (a common use of /bin/sh by Emacs), otherwise | |
8 | invokes the user-specified command processor to handle built-in shell | |
9 | commands, batch files and interactive mode. | |
10 | ||
11 | The main function is simply to process the "-c string" option in the | |
12 | way /bin/sh does, since the standard Windows command shells use the | |
13 | convention that everything after "/c" (the Windows equivalent of | |
14 | "-c") is the input string. | |
15 | ||
16 | This file is part of GNU Emacs. | |
17 | ||
eef0be9e | 18 | GNU Emacs is free software: you can redistribute it and/or modify |
8c012929 | 19 | it under the terms of the GNU General Public License as published by |
eef0be9e GM |
20 | the Free Software Foundation, either version 3 of the License, or |
21 | (at your option) any later version. | |
8c012929 GV |
22 | |
23 | GNU Emacs is distributed in the hope that it will be useful, | |
24 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
25 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
26 | GNU General Public License for more details. | |
27 | ||
28 | You should have received a copy of the GNU General Public License | |
eef0be9e | 29 | along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */ |
8c012929 GV |
30 | |
31 | #include <windows.h> | |
32 | ||
33 | #include <stdarg.h> /* va_args */ | |
34 | #include <malloc.h> /* alloca */ | |
35 | #include <stdlib.h> /* getenv */ | |
36 | #include <string.h> /* strlen */ | |
37 | ||
38 | ||
39 | /******* Mock C library routines *********************************/ | |
40 | ||
41 | /* These routines are used primarily to minimize the executable size. */ | |
42 | ||
43 | #define stdin GetStdHandle (STD_INPUT_HANDLE) | |
44 | #define stdout GetStdHandle (STD_OUTPUT_HANDLE) | |
45 | #define stderr GetStdHandle (STD_ERROR_HANDLE) | |
46 | ||
47 | int | |
48 | vfprintf(HANDLE hnd, char * msg, va_list args) | |
49 | { | |
50 | DWORD bytes_written; | |
51 | char buf[1024]; | |
52 | ||
53 | wvsprintf (buf, msg, args); | |
54 | return WriteFile (hnd, buf, strlen (buf), &bytes_written, NULL); | |
55 | } | |
56 | ||
57 | int | |
58 | fprintf(HANDLE hnd, char * msg, ...) | |
59 | { | |
60 | va_list args; | |
61 | int rc; | |
62 | ||
63 | va_start (args, msg); | |
64 | rc = vfprintf (hnd, msg, args); | |
65 | va_end (args); | |
66 | ||
67 | return rc; | |
68 | } | |
69 | ||
70 | int | |
71 | printf(char * msg, ...) | |
72 | { | |
73 | va_list args; | |
74 | int rc; | |
75 | ||
76 | va_start (args, msg); | |
77 | rc = vfprintf (stdout, msg, args); | |
78 | va_end (args); | |
79 | ||
80 | return rc; | |
81 | } | |
82 | ||
83 | void | |
84 | fail (char * msg, ...) | |
85 | { | |
86 | va_list args; | |
87 | ||
88 | va_start (args, msg); | |
89 | vfprintf (stderr, msg, args); | |
90 | va_end (args); | |
91 | ||
52969220 | 92 | exit (-1); |
8c012929 GV |
93 | } |
94 | ||
95 | void | |
96 | warn (char * msg, ...) | |
97 | { | |
98 | va_list args; | |
99 | ||
100 | va_start (args, msg); | |
101 | vfprintf (stderr, msg, args); | |
102 | va_end (args); | |
103 | } | |
104 | ||
105 | /******************************************************************/ | |
106 | ||
107 | char * | |
108 | canon_filename (char *fname) | |
109 | { | |
110 | char *p = fname; | |
111 | ||
112 | while (*p) | |
113 | { | |
114 | if (*p == '/') | |
115 | *p = '\\'; | |
116 | p++; | |
117 | } | |
118 | ||
119 | return fname; | |
120 | } | |
121 | ||
122 | char * | |
123 | skip_space (char *str) | |
124 | { | |
125 | while (isspace (*str)) str++; | |
126 | return str; | |
127 | } | |
128 | ||
129 | char * | |
130 | skip_nonspace (char *str) | |
131 | { | |
132 | while (*str && !isspace (*str)) str++; | |
133 | return str; | |
134 | } | |
135 | ||
136 | int escape_char = '\\'; | |
137 | ||
138 | /* Get next token from input, advancing pointer. */ | |
139 | int | |
140 | get_next_token (char * buf, char ** pSrc) | |
141 | { | |
142 | char * p = *pSrc; | |
143 | char * o = buf; | |
144 | ||
145 | p = skip_space (p); | |
146 | if (*p == '"') | |
147 | { | |
148 | int escape_char_run = 0; | |
149 | ||
150 | /* Go through src until an ending quote is found, unescaping | |
151 | quotes along the way. If the escape char is not quote, then do | |
152 | special handling of multiple escape chars preceding a quote | |
153 | char (ie. the reverse of what Emacs does to escape quotes). */ | |
154 | p++; | |
155 | while (1) | |
156 | { | |
157 | if (p[0] == escape_char && escape_char != '"') | |
158 | { | |
159 | escape_char_run++; | |
2afff93a | 160 | p++; |
8c012929 GV |
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. */ | |
177c0ea7 | 232 | for (i = 0; i < n_exts; i++) |
8c012929 GV |
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 | ||
177c0ea7 | 242 | /* Return the absolute name of executable file PROG, including |
8c012929 GV |
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 | ||
177c0ea7 | 274 | if (GetCurrentDirectory (MAX_PATH, curdir) <= 0) |
8c012929 GV |
275 | return NULL; |
276 | ||
277 | /* Relative path; search in current dir. */ | |
177c0ea7 | 278 | if (strpbrk (prog, "\\")) |
8c012929 GV |
279 | { |
280 | if (search_dir (curdir, prog, MAX_PATH, absname) > 0) | |
281 | return strdup (absname); | |
177c0ea7 | 282 | else |
8c012929 GV |
283 | return NULL; |
284 | } | |
177c0ea7 | 285 | |
8c012929 GV |
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; | |
177c0ea7 | 306 | } |
8c012929 GV |
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 | ||
177c0ea7 | 324 | |
8c012929 GV |
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 | { | |
fffa137c | 344 | /* Both command.com and cmd.exe have the annoying behavior of |
8c012929 GV |
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 | ||
52969220 GV |
369 | /* Change from normal usage; return value indicates whether spawn |
370 | succeeded or failed - program return code is returned separately. */ | |
8c012929 | 371 | int |
d78e84f7 | 372 | spawn (char * progname, char * cmdline, char * dir, int * retcode) |
8c012929 | 373 | { |
52969220 | 374 | BOOL success = FALSE; |
8c012929 GV |
375 | SECURITY_ATTRIBUTES sec_attrs; |
376 | STARTUPINFO start; | |
52969220 GV |
377 | /* In theory, passing NULL for the environment block to CreateProcess |
378 | is the same as passing the value of GetEnvironmentStrings, but | |
379 | doing this explicitly seems to cure problems running DOS programs | |
380 | in some cases. */ | |
baf7eeb5 | 381 | char * envblock = GetEnvironmentStrings (); |
8c012929 GV |
382 | |
383 | sec_attrs.nLength = sizeof (sec_attrs); | |
384 | sec_attrs.lpSecurityDescriptor = NULL; | |
385 | sec_attrs.bInheritHandle = FALSE; | |
177c0ea7 | 386 | |
8c012929 GV |
387 | memset (&start, 0, sizeof (start)); |
388 | start.cb = sizeof (start); | |
389 | ||
390 | if (CreateProcess (progname, cmdline, &sec_attrs, NULL, TRUE, | |
d78e84f7 | 391 | 0, envblock, dir, &start, &child)) |
8c012929 | 392 | { |
52969220 | 393 | success = TRUE; |
8c012929 GV |
394 | /* wait for completion and pass on return code */ |
395 | WaitForSingleObject (child.hProcess, INFINITE); | |
52969220 GV |
396 | if (retcode) |
397 | GetExitCodeProcess (child.hProcess, (DWORD *)retcode); | |
8c012929 GV |
398 | CloseHandle (child.hThread); |
399 | CloseHandle (child.hProcess); | |
400 | child.hProcess = NULL; | |
401 | } | |
402 | ||
baf7eeb5 GV |
403 | FreeEnvironmentStrings (envblock); |
404 | ||
52969220 | 405 | return success; |
8c012929 GV |
406 | } |
407 | ||
baf7eeb5 GV |
408 | /* Return size of current environment block. */ |
409 | int | |
410 | get_env_size () | |
411 | { | |
412 | char * start = GetEnvironmentStrings (); | |
413 | char * tmp = start; | |
414 | ||
415 | while (tmp[0] || tmp[1]) | |
416 | ++tmp; | |
417 | FreeEnvironmentStrings (start); | |
418 | return tmp + 2 - start; | |
419 | } | |
420 | ||
8c012929 GV |
421 | /******* Main program ********************************************/ |
422 | ||
423 | int | |
424 | main (int argc, char ** argv) | |
425 | { | |
426 | int rc; | |
427 | int need_shell; | |
428 | char * cmdline; | |
429 | char * progname; | |
430 | int envsize; | |
baf7eeb5 GV |
431 | char **pass_through_args; |
432 | int num_pass_through_args; | |
8c012929 GV |
433 | char modname[MAX_PATH]; |
434 | char path[MAX_PATH]; | |
d78e84f7 | 435 | char dir[MAX_PATH]; |
8c012929 GV |
436 | |
437 | ||
438 | interactive = TRUE; | |
439 | ||
440 | SetConsoleCtrlHandler ((PHANDLER_ROUTINE) console_event_handler, TRUE); | |
441 | ||
d78e84f7 AI |
442 | if (!GetCurrentDirectory (sizeof (dir), dir)) |
443 | fail ("error: GetCurrentDirectory failed\n"); | |
444 | ||
8c012929 GV |
445 | /* We serve double duty: we can be called either as a proxy for the |
446 | real shell (that is, because we are defined to be the user shell), | |
447 | or in our role as a helper application for running DOS programs. | |
448 | In the former case, we interpret the command line options as if we | |
449 | were a Unix shell, but in the latter case we simply pass our | |
450 | command line to CreateProcess. We know which case we are dealing | |
451 | with by whether argv[0] refers to ourself or to some other program. | |
452 | (This relies on an arcane feature of CreateProcess, where we can | |
453 | specify cmdproxy as the module to run, but specify a different | |
454 | program in the command line - the MSVC startup code sets argv[0] | |
455 | from the command line.) */ | |
456 | ||
457 | if (!GetModuleFileName (NULL, modname, sizeof (modname))) | |
baf7eeb5 | 458 | fail ("error: GetModuleFileName failed\n"); |
8c012929 | 459 | |
d78e84f7 AI |
460 | /* Change directory to location of .exe so startup directory can be |
461 | deleted. */ | |
462 | progname = strrchr (modname, '\\'); | |
463 | *progname = '\0'; | |
464 | SetCurrentDirectory (modname); | |
465 | *progname = '\\'; | |
466 | ||
7387d2a0 JR |
467 | /* Due to problems with interaction between API functions that use "OEM" |
468 | codepage vs API functions that use the "ANSI" codepage, we need to | |
469 | make things consistent by choosing one and sticking with it. */ | |
470 | SetConsoleCP (GetACP()); | |
471 | SetConsoleOutputCP (GetACP()); | |
472 | ||
8c012929 GV |
473 | /* Although Emacs always sets argv[0] to an absolute pathname, we |
474 | might get run in other ways as well, so convert argv[0] to an | |
a5e8ac59 AI |
475 | absolute name before comparing to the module name. Don't get |
476 | caught out by mixed short and long names. */ | |
477 | GetShortPathName (modname, modname, sizeof (modname)); | |
478 | path[0] = '\0'; | |
8c012929 | 479 | if (!SearchPath (NULL, argv[0], ".exe", sizeof (path), path, &progname) |
a5e8ac59 | 480 | || !GetShortPathName (path, path, sizeof (path)) |
8c012929 GV |
481 | || stricmp (modname, path) != 0) |
482 | { | |
483 | /* We are being used as a helper to run a DOS app; just pass | |
484 | command line to DOS app without change. */ | |
485 | /* TODO: fill in progname. */ | |
d78e84f7 | 486 | if (spawn (NULL, GetCommandLine (), dir, &rc)) |
52969220 GV |
487 | return rc; |
488 | fail ("Could not run %s\n", GetCommandLine ()); | |
8c012929 GV |
489 | } |
490 | ||
491 | /* Process command line. If running interactively (-c or /c not | |
492 | specified) then spawn a real command shell, passing it the command | |
493 | line arguments. | |
494 | ||
495 | If not running interactively, then attempt to execute the specified | |
496 | command directly. If necessary, spawn a real shell to execute the | |
497 | command. | |
498 | ||
499 | */ | |
500 | ||
501 | progname = NULL; | |
502 | cmdline = NULL; | |
503 | /* If no args, spawn real shell for interactive use. */ | |
504 | need_shell = TRUE; | |
505 | interactive = TRUE; | |
baf7eeb5 GV |
506 | /* Ask command.com to create an environment block with a reasonable |
507 | amount of free space. */ | |
508 | envsize = get_env_size () + 300; | |
509 | pass_through_args = (char **) alloca (argc * sizeof(char *)); | |
510 | num_pass_through_args = 0; | |
8c012929 GV |
511 | |
512 | while (--argc > 0) | |
513 | { | |
514 | ++argv; | |
baf7eeb5 | 515 | /* Act on switches we recognize (mostly single letter switches, |
aecf7181 | 516 | except for -e); all unrecognized switches and extra args are |
baf7eeb5 GV |
517 | passed on to real shell if used (only really of benefit for |
518 | interactive use, but allow for batch use as well). Accept / as | |
aecf7181 | 519 | switch char for compatibility with cmd.exe. */ |
1d7d10d1 | 520 | if (((*argv)[0] == '-' || (*argv)[0] == '/') && (*argv)[1] != '\0') |
8c012929 | 521 | { |
1d7d10d1 | 522 | if (((*argv)[1] == 'c' || (*argv)[1] == 'C') && ((*argv)[2] == '\0')) |
8c012929 GV |
523 | { |
524 | if (--argc == 0) | |
baf7eeb5 | 525 | fail ("error: expecting arg for %s\n", *argv); |
8c012929 GV |
526 | cmdline = *(++argv); |
527 | interactive = FALSE; | |
528 | } | |
1d7d10d1 | 529 | else if (((*argv)[1] == 'i' || (*argv)[1] == 'I') && ((*argv)[2] == '\0')) |
8c012929 GV |
530 | { |
531 | if (cmdline) | |
baf7eeb5 | 532 | warn ("warning: %s ignored because of -c\n", *argv); |
8c012929 | 533 | } |
f49f08cc | 534 | else if (((*argv)[1] == 'e' || (*argv)[1] == 'E') && ((*argv)[2] == ':')) |
8c012929 | 535 | { |
baf7eeb5 GV |
536 | int requested_envsize = atoi (*argv + 3); |
537 | /* Enforce a reasonable minimum size, as above. */ | |
538 | if (requested_envsize > envsize) | |
539 | envsize = requested_envsize; | |
540 | /* For sanity, enforce a reasonable maximum. */ | |
541 | if (envsize > 32768) | |
542 | envsize = 32768; | |
8c012929 GV |
543 | } |
544 | else | |
545 | { | |
baf7eeb5 GV |
546 | /* warn ("warning: unknown option %s ignored", *argv); */ |
547 | pass_through_args[num_pass_through_args++] = *argv; | |
8c012929 GV |
548 | } |
549 | } | |
550 | else | |
551 | break; | |
552 | } | |
553 | ||
baf7eeb5 GV |
554 | #if 0 |
555 | /* I think this is probably not useful - cmd.exe ignores extra | |
556 | (non-switch) args in interactive mode, and they cannot be passed on | |
557 | when -c was given. */ | |
558 | ||
559 | /* Collect any remaining args after (initial) switches. */ | |
560 | while (argc-- > 0) | |
561 | { | |
562 | pass_through_args[num_pass_through_args++] = *argv++; | |
563 | } | |
564 | #else | |
565 | /* Probably a mistake for there to be extra args; not fatal. */ | |
566 | if (argc > 0) | |
ec025f9d | 567 | warn ("warning: extra args ignored after '%s'\n", argv[-1]); |
baf7eeb5 GV |
568 | #endif |
569 | ||
570 | pass_through_args[num_pass_through_args] = NULL; | |
571 | ||
8c012929 GV |
572 | /* If -c option, determine if we must spawn a real shell, or if we can |
573 | execute the command directly ourself. */ | |
574 | if (cmdline) | |
575 | { | |
576 | /* If no redirection or piping, and if program can be found, then | |
577 | run program directly. Otherwise invoke a real shell. */ | |
578 | ||
579 | static char copout_chars[] = "|<>&"; | |
580 | ||
581 | if (strpbrk (cmdline, copout_chars) == NULL) | |
582 | { | |
583 | char *args; | |
584 | ||
585 | /* The program name is the first token of cmdline. Since | |
586 | filenames cannot legally contain embedded quotes, the value | |
587 | of escape_char doesn't matter. */ | |
588 | args = cmdline; | |
589 | if (!get_next_token (path, &args)) | |
590 | fail ("error: no program name specified.\n"); | |
591 | ||
592 | canon_filename (path); | |
593 | progname = make_absolute (path); | |
594 | ||
595 | /* If we found the program, run it directly (if not found it | |
596 | might be an internal shell command, so don't fail). */ | |
597 | if (progname != NULL) | |
598 | need_shell = FALSE; | |
599 | } | |
600 | } | |
601 | ||
ec025f9d | 602 | pass_to_shell: |
8c012929 GV |
603 | if (need_shell) |
604 | { | |
605 | char * p; | |
baf7eeb5 | 606 | int extra_arg_space = 0; |
8de1edce | 607 | int run_command_dot_com; |
8c012929 GV |
608 | |
609 | progname = getenv ("COMSPEC"); | |
610 | if (!progname) | |
baf7eeb5 | 611 | fail ("error: COMSPEC is not set\n"); |
8c012929 GV |
612 | |
613 | canon_filename (progname); | |
614 | progname = make_absolute (progname); | |
615 | ||
616 | if (progname == NULL || strchr (progname, '\\') == NULL) | |
baf7eeb5 GV |
617 | fail ("error: the program %s could not be found.\n", getenv ("COMSPEC")); |
618 | ||
8de1edce GV |
619 | /* Need to set environment size when running command.com. */ |
620 | run_command_dot_com = | |
621 | (stricmp (strrchr (progname, '\\'), "command.com") == 0); | |
622 | ||
baf7eeb5 GV |
623 | /* Work out how much extra space is required for |
624 | pass_through_args. */ | |
625 | for (argv = pass_through_args; *argv != NULL; ++argv) | |
626 | /* We don't expect to have to quote switches. */ | |
627 | extra_arg_space += strlen (*argv) + 2; | |
8c012929 GV |
628 | |
629 | if (cmdline) | |
630 | { | |
baf7eeb5 GV |
631 | char * buf; |
632 | ||
8c012929 GV |
633 | /* Convert to syntax expected by cmd.exe/command.com for |
634 | running non-interactively. Always quote program name in | |
635 | case path contains spaces (fortunately it can't contain | |
636 | quotes, since they are illegal in path names). */ | |
baf7eeb5 GV |
637 | |
638 | buf = p = alloca (strlen (progname) + extra_arg_space + | |
639 | strlen (cmdline) + 16); | |
640 | ||
641 | /* Quote progname in case it contains spaces. */ | |
642 | p += wsprintf (p, "\"%s\"", progname); | |
643 | ||
644 | /* Include pass_through_args verbatim; these are just switches | |
645 | so should not need quoting. */ | |
646 | for (argv = pass_through_args; *argv != NULL; ++argv) | |
647 | p += wsprintf (p, " %s", *argv); | |
648 | ||
8de1edce | 649 | if (run_command_dot_com) |
ec025f9d GV |
650 | wsprintf(p, " /e:%d /c %s", envsize, cmdline); |
651 | else | |
652 | wsprintf(p, " /c %s", cmdline); | |
baf7eeb5 | 653 | cmdline = buf; |
8c012929 GV |
654 | } |
655 | else | |
656 | { | |
8de1edce | 657 | if (run_command_dot_com) |
ec025f9d GV |
658 | { |
659 | /* Provide dir arg expected by command.com when first | |
8de1edce | 660 | started interactively (the "command search path"). To |
ec025f9d GV |
661 | avoid potential problems with spaces in command dir |
662 | (which cannot be quoted - command.com doesn't like it), | |
663 | we always use the 8.3 form. */ | |
664 | GetShortPathName (progname, path, sizeof (path)); | |
665 | p = strrchr (path, '\\'); | |
666 | /* Trailing slash is acceptable, so always leave it. */ | |
667 | *(++p) = '\0'; | |
668 | } | |
669 | else | |
ec025f9d | 670 | path[0] = '\0'; |
8c012929 | 671 | |
baf7eeb5 GV |
672 | cmdline = p = alloca (strlen (progname) + extra_arg_space + |
673 | strlen (path) + 13); | |
8c012929 GV |
674 | |
675 | /* Quote progname in case it contains spaces. */ | |
baf7eeb5 GV |
676 | p += wsprintf (p, "\"%s\" %s", progname, path); |
677 | ||
678 | /* Include pass_through_args verbatim; these are just switches | |
679 | so should not need quoting. */ | |
680 | for (argv = pass_through_args; *argv != NULL; ++argv) | |
681 | p += wsprintf (p, " %s", *argv); | |
682 | ||
8de1edce | 683 | if (run_command_dot_com) |
ec025f9d | 684 | wsprintf (p, " /e:%d", envsize); |
8c012929 GV |
685 | } |
686 | } | |
687 | ||
688 | if (!progname) | |
689 | fail ("Internal error: program name not defined\n"); | |
690 | ||
691 | if (!cmdline) | |
692 | cmdline = progname; | |
693 | ||
d78e84f7 | 694 | if (spawn (progname, cmdline, dir, &rc)) |
52969220 | 695 | return rc; |
8c012929 | 696 | |
52969220 GV |
697 | if (!need_shell) |
698 | { | |
699 | need_shell = TRUE; | |
700 | goto pass_to_shell; | |
701 | } | |
702 | ||
703 | fail ("Could not run %s\n", progname); | |
704 | ||
705 | return 0; | |
8c012929 | 706 | } |
ab5796a9 MB |
707 | |
708 | /* arch-tag: 88678d93-07ac-4e2f-ad63-d4a740ca69ac | |
709 | (do not change this comment) */ |