Commit | Line | Data |
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8c012929 | 1 | /* Proxy shell designed for use with Emacs on Windows 95 and NT. |
eef0be9e | 2 | Copyright (C) 1997, 2001, 2002, 2003, 2004, 2005, 2006, 2007, |
114f9c96 | 3 | 2008, 2009, 2010 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 | ||
c5958e82 ÓF |
38 | /* We don't want to include stdio.h because we are already duplicating |
39 | lots of it here */ | |
40 | extern int _snprintf (char *buffer, size_t count, const char *format, ...); | |
8c012929 GV |
41 | |
42 | /******* Mock C library routines *********************************/ | |
43 | ||
44 | /* These routines are used primarily to minimize the executable size. */ | |
45 | ||
46 | #define stdin GetStdHandle (STD_INPUT_HANDLE) | |
47 | #define stdout GetStdHandle (STD_OUTPUT_HANDLE) | |
48 | #define stderr GetStdHandle (STD_ERROR_HANDLE) | |
49 | ||
50 | int | |
51 | vfprintf(HANDLE hnd, char * msg, va_list args) | |
52 | { | |
53 | DWORD bytes_written; | |
54 | char buf[1024]; | |
55 | ||
56 | wvsprintf (buf, msg, args); | |
57 | return WriteFile (hnd, buf, strlen (buf), &bytes_written, NULL); | |
58 | } | |
59 | ||
60 | int | |
61 | fprintf(HANDLE hnd, char * msg, ...) | |
62 | { | |
63 | va_list args; | |
64 | int rc; | |
65 | ||
66 | va_start (args, msg); | |
67 | rc = vfprintf (hnd, msg, args); | |
68 | va_end (args); | |
69 | ||
70 | return rc; | |
71 | } | |
72 | ||
73 | int | |
74 | printf(char * msg, ...) | |
75 | { | |
76 | va_list args; | |
77 | int rc; | |
78 | ||
79 | va_start (args, msg); | |
80 | rc = vfprintf (stdout, msg, args); | |
81 | va_end (args); | |
82 | ||
83 | return rc; | |
84 | } | |
85 | ||
86 | void | |
87 | fail (char * msg, ...) | |
88 | { | |
89 | va_list args; | |
90 | ||
91 | va_start (args, msg); | |
92 | vfprintf (stderr, msg, args); | |
93 | va_end (args); | |
94 | ||
52969220 | 95 | exit (-1); |
8c012929 GV |
96 | } |
97 | ||
98 | void | |
99 | warn (char * msg, ...) | |
100 | { | |
101 | va_list args; | |
102 | ||
103 | va_start (args, msg); | |
104 | vfprintf (stderr, msg, args); | |
105 | va_end (args); | |
106 | } | |
107 | ||
108 | /******************************************************************/ | |
109 | ||
110 | char * | |
111 | canon_filename (char *fname) | |
112 | { | |
113 | char *p = fname; | |
114 | ||
115 | while (*p) | |
116 | { | |
117 | if (*p == '/') | |
118 | *p = '\\'; | |
119 | p++; | |
120 | } | |
121 | ||
122 | return fname; | |
123 | } | |
124 | ||
125 | char * | |
126 | skip_space (char *str) | |
127 | { | |
128 | while (isspace (*str)) str++; | |
129 | return str; | |
130 | } | |
131 | ||
132 | char * | |
133 | skip_nonspace (char *str) | |
134 | { | |
135 | while (*str && !isspace (*str)) str++; | |
136 | return str; | |
137 | } | |
138 | ||
139 | int escape_char = '\\'; | |
140 | ||
141 | /* Get next token from input, advancing pointer. */ | |
142 | int | |
143 | get_next_token (char * buf, char ** pSrc) | |
144 | { | |
145 | char * p = *pSrc; | |
146 | char * o = buf; | |
147 | ||
148 | p = skip_space (p); | |
149 | if (*p == '"') | |
150 | { | |
151 | int escape_char_run = 0; | |
152 | ||
153 | /* Go through src until an ending quote is found, unescaping | |
154 | quotes along the way. If the escape char is not quote, then do | |
155 | special handling of multiple escape chars preceding a quote | |
156 | char (ie. the reverse of what Emacs does to escape quotes). */ | |
157 | p++; | |
158 | while (1) | |
159 | { | |
160 | if (p[0] == escape_char && escape_char != '"') | |
161 | { | |
162 | escape_char_run++; | |
2afff93a | 163 | p++; |
8c012929 GV |
164 | continue; |
165 | } | |
166 | else if (p[0] == '"') | |
167 | { | |
168 | while (escape_char_run > 1) | |
169 | { | |
170 | *o++ = escape_char; | |
171 | escape_char_run -= 2; | |
172 | } | |
173 | ||
174 | if (escape_char_run > 0) | |
175 | { | |
176 | /* escaped quote */ | |
177 | *o++ = *p++; | |
178 | escape_char_run = 0; | |
179 | } | |
180 | else if (p[1] == escape_char && escape_char == '"') | |
181 | { | |
182 | /* quote escaped by doubling */ | |
183 | *o++ = *p; | |
184 | p += 2; | |
185 | } | |
186 | else | |
187 | { | |
188 | /* The ending quote. */ | |
189 | *o = '\0'; | |
190 | /* Leave input pointer after token. */ | |
191 | p++; | |
192 | break; | |
193 | } | |
194 | } | |
195 | else if (p[0] == '\0') | |
196 | { | |
197 | /* End of string, but no ending quote found. We might want to | |
198 | flag this as an error, but for now will consider the end as | |
199 | the end of the token. */ | |
200 | *o = '\0'; | |
201 | break; | |
202 | } | |
203 | else | |
204 | { | |
205 | *o++ = *p++; | |
206 | } | |
207 | } | |
208 | } | |
209 | else | |
210 | { | |
211 | /* Next token is delimited by whitespace. */ | |
212 | char * p1 = skip_nonspace (p); | |
213 | memcpy (o, p, p1 - p); | |
214 | o += (p1 - p); | |
baf7eeb5 | 215 | *o = '\0'; |
8c012929 GV |
216 | p = p1; |
217 | } | |
218 | ||
219 | *pSrc = p; | |
220 | ||
221 | return o - buf; | |
222 | } | |
223 | ||
224 | /* Search for EXEC file in DIR. If EXEC does not have an extension, | |
225 | DIR is searched for EXEC with the standard extensions appended. */ | |
226 | int | |
227 | search_dir (char *dir, char *exec, int bufsize, char *buffer) | |
228 | { | |
229 | char *exts[] = {".bat", ".cmd", ".exe", ".com"}; | |
230 | int n_exts = sizeof (exts) / sizeof (char *); | |
231 | char *dummy; | |
232 | int i, rc; | |
233 | ||
234 | /* Search the directory for the program. */ | |
177c0ea7 | 235 | for (i = 0; i < n_exts; i++) |
8c012929 GV |
236 | { |
237 | rc = SearchPath (dir, exec, exts[i], bufsize, buffer, &dummy); | |
238 | if (rc > 0) | |
239 | return rc; | |
240 | } | |
241 | ||
242 | return 0; | |
243 | } | |
244 | ||
177c0ea7 | 245 | /* Return the absolute name of executable file PROG, including |
8c012929 GV |
246 | any file extensions. If an absolute name for PROG cannot be found, |
247 | return NULL. */ | |
248 | char * | |
249 | make_absolute (char *prog) | |
250 | { | |
251 | char absname[MAX_PATH]; | |
252 | char dir[MAX_PATH]; | |
253 | char curdir[MAX_PATH]; | |
254 | char *p, *fname; | |
255 | char *path; | |
256 | int i; | |
257 | ||
258 | /* At least partial absolute path specified; search there. */ | |
259 | if ((isalpha (prog[0]) && prog[1] == ':') || | |
260 | (prog[0] == '\\')) | |
261 | { | |
262 | /* Split the directory from the filename. */ | |
263 | fname = strrchr (prog, '\\'); | |
264 | if (!fname) | |
265 | /* Only a drive specifier is given. */ | |
266 | fname = prog + 2; | |
267 | strncpy (dir, prog, fname - prog); | |
268 | dir[fname - prog] = '\0'; | |
269 | ||
270 | /* Search the directory for the program. */ | |
271 | if (search_dir (dir, prog, MAX_PATH, absname) > 0) | |
272 | return strdup (absname); | |
273 | else | |
274 | return NULL; | |
275 | } | |
276 | ||
177c0ea7 | 277 | if (GetCurrentDirectory (MAX_PATH, curdir) <= 0) |
8c012929 GV |
278 | return NULL; |
279 | ||
280 | /* Relative path; search in current dir. */ | |
177c0ea7 | 281 | if (strpbrk (prog, "\\")) |
8c012929 GV |
282 | { |
283 | if (search_dir (curdir, prog, MAX_PATH, absname) > 0) | |
284 | return strdup (absname); | |
177c0ea7 | 285 | else |
8c012929 GV |
286 | return NULL; |
287 | } | |
177c0ea7 | 288 | |
8c012929 GV |
289 | /* Just filename; search current directory then PATH. */ |
290 | path = alloca (strlen (getenv ("PATH")) + strlen (curdir) + 2); | |
291 | strcpy (path, curdir); | |
292 | strcat (path, ";"); | |
293 | strcat (path, getenv ("PATH")); | |
294 | ||
295 | while (*path) | |
296 | { | |
297 | /* Get next directory from path. */ | |
298 | p = path; | |
299 | while (*p && *p != ';') p++; | |
300 | strncpy (dir, path, p - path); | |
301 | dir[p - path] = '\0'; | |
302 | ||
303 | /* Search the directory for the program. */ | |
304 | if (search_dir (dir, prog, MAX_PATH, absname) > 0) | |
305 | return strdup (absname); | |
306 | ||
307 | /* Move to the next directory. */ | |
308 | path = p + 1; | |
177c0ea7 | 309 | } |
8c012929 GV |
310 | |
311 | return NULL; | |
312 | } | |
313 | ||
314 | /*****************************************************************/ | |
315 | ||
316 | #if 0 | |
317 | char ** _argv; | |
318 | int _argc; | |
319 | ||
320 | /* Parse commandline into argv array, allowing proper quoting of args. */ | |
321 | void | |
322 | setup_argv (void) | |
323 | { | |
324 | char * cmdline = GetCommandLine (); | |
325 | int arg_bytes = 0; | |
326 | ||
177c0ea7 | 327 | |
8c012929 GV |
328 | } |
329 | #endif | |
330 | ||
331 | /* Information about child proc is global, to allow for automatic | |
332 | termination when interrupted. At the moment, only one child process | |
333 | can be running at any one time. */ | |
334 | ||
335 | PROCESS_INFORMATION child; | |
336 | int interactive = TRUE; | |
337 | ||
338 | BOOL | |
339 | console_event_handler (DWORD event) | |
340 | { | |
341 | switch (event) | |
342 | { | |
343 | case CTRL_C_EVENT: | |
344 | case CTRL_BREAK_EVENT: | |
345 | if (!interactive) | |
346 | { | |
fffa137c | 347 | /* Both command.com and cmd.exe have the annoying behavior of |
8c012929 GV |
348 | prompting "Terminate batch job (y/n)?" when interrupted |
349 | while running a batch file, even if running in | |
350 | non-interactive (-c) mode. Try to make up for this | |
351 | deficiency by forcibly terminating the subprocess if | |
352 | running non-interactively. */ | |
353 | if (child.hProcess && | |
354 | WaitForSingleObject (child.hProcess, 500) != WAIT_OBJECT_0) | |
355 | TerminateProcess (child.hProcess, 0); | |
356 | exit (STATUS_CONTROL_C_EXIT); | |
357 | } | |
358 | break; | |
359 | ||
360 | #if 0 | |
361 | default: | |
362 | /* CLOSE, LOGOFF and SHUTDOWN events - actually we don't get these | |
363 | under Windows 95. */ | |
364 | fail ("cmdproxy: received %d event\n", event); | |
365 | if (child.hProcess) | |
366 | TerminateProcess (child.hProcess, 0); | |
367 | #endif | |
368 | } | |
369 | return TRUE; | |
370 | } | |
371 | ||
52969220 GV |
372 | /* Change from normal usage; return value indicates whether spawn |
373 | succeeded or failed - program return code is returned separately. */ | |
8c012929 | 374 | int |
d78e84f7 | 375 | spawn (char * progname, char * cmdline, char * dir, int * retcode) |
8c012929 | 376 | { |
52969220 | 377 | BOOL success = FALSE; |
8c012929 GV |
378 | SECURITY_ATTRIBUTES sec_attrs; |
379 | STARTUPINFO start; | |
52969220 GV |
380 | /* In theory, passing NULL for the environment block to CreateProcess |
381 | is the same as passing the value of GetEnvironmentStrings, but | |
382 | doing this explicitly seems to cure problems running DOS programs | |
383 | in some cases. */ | |
baf7eeb5 | 384 | char * envblock = GetEnvironmentStrings (); |
8c012929 GV |
385 | |
386 | sec_attrs.nLength = sizeof (sec_attrs); | |
387 | sec_attrs.lpSecurityDescriptor = NULL; | |
388 | sec_attrs.bInheritHandle = FALSE; | |
177c0ea7 | 389 | |
8c012929 GV |
390 | memset (&start, 0, sizeof (start)); |
391 | start.cb = sizeof (start); | |
392 | ||
393 | if (CreateProcess (progname, cmdline, &sec_attrs, NULL, TRUE, | |
d78e84f7 | 394 | 0, envblock, dir, &start, &child)) |
8c012929 | 395 | { |
52969220 | 396 | success = TRUE; |
8c012929 GV |
397 | /* wait for completion and pass on return code */ |
398 | WaitForSingleObject (child.hProcess, INFINITE); | |
52969220 GV |
399 | if (retcode) |
400 | GetExitCodeProcess (child.hProcess, (DWORD *)retcode); | |
8c012929 GV |
401 | CloseHandle (child.hThread); |
402 | CloseHandle (child.hProcess); | |
403 | child.hProcess = NULL; | |
404 | } | |
405 | ||
baf7eeb5 GV |
406 | FreeEnvironmentStrings (envblock); |
407 | ||
52969220 | 408 | return success; |
8c012929 GV |
409 | } |
410 | ||
baf7eeb5 GV |
411 | /* Return size of current environment block. */ |
412 | int | |
7c3320d8 | 413 | get_env_size (void) |
baf7eeb5 GV |
414 | { |
415 | char * start = GetEnvironmentStrings (); | |
416 | char * tmp = start; | |
417 | ||
418 | while (tmp[0] || tmp[1]) | |
419 | ++tmp; | |
420 | FreeEnvironmentStrings (start); | |
421 | return tmp + 2 - start; | |
422 | } | |
423 | ||
8c012929 GV |
424 | /******* Main program ********************************************/ |
425 | ||
426 | int | |
427 | main (int argc, char ** argv) | |
428 | { | |
429 | int rc; | |
430 | int need_shell; | |
431 | char * cmdline; | |
432 | char * progname; | |
433 | int envsize; | |
baf7eeb5 GV |
434 | char **pass_through_args; |
435 | int num_pass_through_args; | |
8c012929 GV |
436 | char modname[MAX_PATH]; |
437 | char path[MAX_PATH]; | |
d78e84f7 | 438 | char dir[MAX_PATH]; |
8c012929 GV |
439 | |
440 | ||
441 | interactive = TRUE; | |
442 | ||
443 | SetConsoleCtrlHandler ((PHANDLER_ROUTINE) console_event_handler, TRUE); | |
444 | ||
d78e84f7 AI |
445 | if (!GetCurrentDirectory (sizeof (dir), dir)) |
446 | fail ("error: GetCurrentDirectory failed\n"); | |
447 | ||
8c012929 GV |
448 | /* We serve double duty: we can be called either as a proxy for the |
449 | real shell (that is, because we are defined to be the user shell), | |
450 | or in our role as a helper application for running DOS programs. | |
451 | In the former case, we interpret the command line options as if we | |
452 | were a Unix shell, but in the latter case we simply pass our | |
453 | command line to CreateProcess. We know which case we are dealing | |
454 | with by whether argv[0] refers to ourself or to some other program. | |
455 | (This relies on an arcane feature of CreateProcess, where we can | |
456 | specify cmdproxy as the module to run, but specify a different | |
457 | program in the command line - the MSVC startup code sets argv[0] | |
458 | from the command line.) */ | |
459 | ||
460 | if (!GetModuleFileName (NULL, modname, sizeof (modname))) | |
baf7eeb5 | 461 | fail ("error: GetModuleFileName failed\n"); |
8c012929 | 462 | |
d78e84f7 AI |
463 | /* Change directory to location of .exe so startup directory can be |
464 | deleted. */ | |
465 | progname = strrchr (modname, '\\'); | |
466 | *progname = '\0'; | |
467 | SetCurrentDirectory (modname); | |
468 | *progname = '\\'; | |
469 | ||
7387d2a0 JR |
470 | /* Due to problems with interaction between API functions that use "OEM" |
471 | codepage vs API functions that use the "ANSI" codepage, we need to | |
472 | make things consistent by choosing one and sticking with it. */ | |
473 | SetConsoleCP (GetACP()); | |
474 | SetConsoleOutputCP (GetACP()); | |
475 | ||
8c012929 GV |
476 | /* Although Emacs always sets argv[0] to an absolute pathname, we |
477 | might get run in other ways as well, so convert argv[0] to an | |
a5e8ac59 AI |
478 | absolute name before comparing to the module name. Don't get |
479 | caught out by mixed short and long names. */ | |
480 | GetShortPathName (modname, modname, sizeof (modname)); | |
481 | path[0] = '\0'; | |
8c012929 | 482 | if (!SearchPath (NULL, argv[0], ".exe", sizeof (path), path, &progname) |
a5e8ac59 | 483 | || !GetShortPathName (path, path, sizeof (path)) |
8c012929 GV |
484 | || stricmp (modname, path) != 0) |
485 | { | |
486 | /* We are being used as a helper to run a DOS app; just pass | |
487 | command line to DOS app without change. */ | |
488 | /* TODO: fill in progname. */ | |
d78e84f7 | 489 | if (spawn (NULL, GetCommandLine (), dir, &rc)) |
52969220 GV |
490 | return rc; |
491 | fail ("Could not run %s\n", GetCommandLine ()); | |
8c012929 GV |
492 | } |
493 | ||
494 | /* Process command line. If running interactively (-c or /c not | |
495 | specified) then spawn a real command shell, passing it the command | |
496 | line arguments. | |
497 | ||
498 | If not running interactively, then attempt to execute the specified | |
499 | command directly. If necessary, spawn a real shell to execute the | |
500 | command. | |
501 | ||
502 | */ | |
503 | ||
504 | progname = NULL; | |
505 | cmdline = NULL; | |
506 | /* If no args, spawn real shell for interactive use. */ | |
507 | need_shell = TRUE; | |
508 | interactive = TRUE; | |
baf7eeb5 GV |
509 | /* Ask command.com to create an environment block with a reasonable |
510 | amount of free space. */ | |
511 | envsize = get_env_size () + 300; | |
512 | pass_through_args = (char **) alloca (argc * sizeof(char *)); | |
513 | num_pass_through_args = 0; | |
8c012929 GV |
514 | |
515 | while (--argc > 0) | |
516 | { | |
517 | ++argv; | |
baf7eeb5 | 518 | /* Act on switches we recognize (mostly single letter switches, |
aecf7181 | 519 | except for -e); all unrecognized switches and extra args are |
baf7eeb5 GV |
520 | passed on to real shell if used (only really of benefit for |
521 | interactive use, but allow for batch use as well). Accept / as | |
aecf7181 | 522 | switch char for compatibility with cmd.exe. */ |
1d7d10d1 | 523 | if (((*argv)[0] == '-' || (*argv)[0] == '/') && (*argv)[1] != '\0') |
8c012929 | 524 | { |
1d7d10d1 | 525 | if (((*argv)[1] == 'c' || (*argv)[1] == 'C') && ((*argv)[2] == '\0')) |
8c012929 GV |
526 | { |
527 | if (--argc == 0) | |
baf7eeb5 | 528 | fail ("error: expecting arg for %s\n", *argv); |
8c012929 GV |
529 | cmdline = *(++argv); |
530 | interactive = FALSE; | |
531 | } | |
1d7d10d1 | 532 | else if (((*argv)[1] == 'i' || (*argv)[1] == 'I') && ((*argv)[2] == '\0')) |
8c012929 GV |
533 | { |
534 | if (cmdline) | |
baf7eeb5 | 535 | warn ("warning: %s ignored because of -c\n", *argv); |
8c012929 | 536 | } |
f49f08cc | 537 | else if (((*argv)[1] == 'e' || (*argv)[1] == 'E') && ((*argv)[2] == ':')) |
8c012929 | 538 | { |
baf7eeb5 GV |
539 | int requested_envsize = atoi (*argv + 3); |
540 | /* Enforce a reasonable minimum size, as above. */ | |
541 | if (requested_envsize > envsize) | |
542 | envsize = requested_envsize; | |
543 | /* For sanity, enforce a reasonable maximum. */ | |
544 | if (envsize > 32768) | |
545 | envsize = 32768; | |
8c012929 GV |
546 | } |
547 | else | |
548 | { | |
baf7eeb5 GV |
549 | /* warn ("warning: unknown option %s ignored", *argv); */ |
550 | pass_through_args[num_pass_through_args++] = *argv; | |
8c012929 GV |
551 | } |
552 | } | |
553 | else | |
554 | break; | |
555 | } | |
556 | ||
baf7eeb5 GV |
557 | #if 0 |
558 | /* I think this is probably not useful - cmd.exe ignores extra | |
559 | (non-switch) args in interactive mode, and they cannot be passed on | |
560 | when -c was given. */ | |
561 | ||
562 | /* Collect any remaining args after (initial) switches. */ | |
563 | while (argc-- > 0) | |
564 | { | |
565 | pass_through_args[num_pass_through_args++] = *argv++; | |
566 | } | |
567 | #else | |
568 | /* Probably a mistake for there to be extra args; not fatal. */ | |
569 | if (argc > 0) | |
ec025f9d | 570 | warn ("warning: extra args ignored after '%s'\n", argv[-1]); |
baf7eeb5 GV |
571 | #endif |
572 | ||
573 | pass_through_args[num_pass_through_args] = NULL; | |
574 | ||
8c012929 GV |
575 | /* If -c option, determine if we must spawn a real shell, or if we can |
576 | execute the command directly ourself. */ | |
577 | if (cmdline) | |
578 | { | |
579 | /* If no redirection or piping, and if program can be found, then | |
580 | run program directly. Otherwise invoke a real shell. */ | |
581 | ||
582 | static char copout_chars[] = "|<>&"; | |
583 | ||
584 | if (strpbrk (cmdline, copout_chars) == NULL) | |
585 | { | |
586 | char *args; | |
587 | ||
588 | /* The program name is the first token of cmdline. Since | |
589 | filenames cannot legally contain embedded quotes, the value | |
590 | of escape_char doesn't matter. */ | |
591 | args = cmdline; | |
592 | if (!get_next_token (path, &args)) | |
593 | fail ("error: no program name specified.\n"); | |
594 | ||
595 | canon_filename (path); | |
596 | progname = make_absolute (path); | |
597 | ||
598 | /* If we found the program, run it directly (if not found it | |
599 | might be an internal shell command, so don't fail). */ | |
600 | if (progname != NULL) | |
601 | need_shell = FALSE; | |
602 | } | |
603 | } | |
604 | ||
ec025f9d | 605 | pass_to_shell: |
8c012929 GV |
606 | if (need_shell) |
607 | { | |
608 | char * p; | |
baf7eeb5 | 609 | int extra_arg_space = 0; |
c5958e82 | 610 | int maxlen, remlen; |
8de1edce | 611 | int run_command_dot_com; |
8c012929 GV |
612 | |
613 | progname = getenv ("COMSPEC"); | |
614 | if (!progname) | |
baf7eeb5 | 615 | fail ("error: COMSPEC is not set\n"); |
8c012929 GV |
616 | |
617 | canon_filename (progname); | |
618 | progname = make_absolute (progname); | |
619 | ||
620 | if (progname == NULL || strchr (progname, '\\') == NULL) | |
baf7eeb5 GV |
621 | fail ("error: the program %s could not be found.\n", getenv ("COMSPEC")); |
622 | ||
8de1edce GV |
623 | /* Need to set environment size when running command.com. */ |
624 | run_command_dot_com = | |
625 | (stricmp (strrchr (progname, '\\'), "command.com") == 0); | |
626 | ||
baf7eeb5 GV |
627 | /* Work out how much extra space is required for |
628 | pass_through_args. */ | |
629 | for (argv = pass_through_args; *argv != NULL; ++argv) | |
630 | /* We don't expect to have to quote switches. */ | |
631 | extra_arg_space += strlen (*argv) + 2; | |
8c012929 GV |
632 | |
633 | if (cmdline) | |
634 | { | |
baf7eeb5 GV |
635 | char * buf; |
636 | ||
8c012929 GV |
637 | /* Convert to syntax expected by cmd.exe/command.com for |
638 | running non-interactively. Always quote program name in | |
639 | case path contains spaces (fortunately it can't contain | |
640 | quotes, since they are illegal in path names). */ | |
baf7eeb5 | 641 | |
c5958e82 ÓF |
642 | remlen = maxlen = |
643 | strlen (progname) + extra_arg_space + strlen (cmdline) + 16; | |
644 | buf = p = alloca (maxlen + 1); | |
baf7eeb5 GV |
645 | |
646 | /* Quote progname in case it contains spaces. */ | |
c5958e82 ÓF |
647 | p += _snprintf (p, remlen, "\"%s\"", progname); |
648 | remlen = maxlen - (p - buf); | |
baf7eeb5 GV |
649 | |
650 | /* Include pass_through_args verbatim; these are just switches | |
651 | so should not need quoting. */ | |
652 | for (argv = pass_through_args; *argv != NULL; ++argv) | |
c5958e82 ÓF |
653 | { |
654 | p += _snprintf (p, remlen, " %s", *argv); | |
655 | remlen = maxlen - (p - buf); | |
656 | } | |
baf7eeb5 | 657 | |
8de1edce | 658 | if (run_command_dot_com) |
c5958e82 | 659 | _snprintf (p, remlen, " /e:%d /c %s", envsize, cmdline); |
ec025f9d | 660 | else |
c5958e82 ÓF |
661 | _snprintf (p, remlen, " /c %s", cmdline); |
662 | remlen = maxlen - (p - buf); | |
baf7eeb5 | 663 | cmdline = buf; |
8c012929 GV |
664 | } |
665 | else | |
666 | { | |
8de1edce | 667 | if (run_command_dot_com) |
ec025f9d GV |
668 | { |
669 | /* Provide dir arg expected by command.com when first | |
8de1edce | 670 | started interactively (the "command search path"). To |
ec025f9d GV |
671 | avoid potential problems with spaces in command dir |
672 | (which cannot be quoted - command.com doesn't like it), | |
673 | we always use the 8.3 form. */ | |
674 | GetShortPathName (progname, path, sizeof (path)); | |
675 | p = strrchr (path, '\\'); | |
676 | /* Trailing slash is acceptable, so always leave it. */ | |
677 | *(++p) = '\0'; | |
678 | } | |
679 | else | |
ec025f9d | 680 | path[0] = '\0'; |
8c012929 | 681 | |
c5958e82 ÓF |
682 | remlen = maxlen = |
683 | strlen (progname) + extra_arg_space + strlen (path) + 13; | |
684 | cmdline = p = alloca (maxlen + 1); | |
8c012929 GV |
685 | |
686 | /* Quote progname in case it contains spaces. */ | |
c5958e82 ÓF |
687 | p += _snprintf (p, remlen, "\"%s\" %s", progname, path); |
688 | remlen = maxlen - (p - cmdline); | |
baf7eeb5 GV |
689 | |
690 | /* Include pass_through_args verbatim; these are just switches | |
691 | so should not need quoting. */ | |
692 | for (argv = pass_through_args; *argv != NULL; ++argv) | |
c5958e82 ÓF |
693 | { |
694 | p += _snprintf (p, remlen, " %s", *argv); | |
695 | remlen = maxlen - (p - cmdline); | |
696 | } | |
baf7eeb5 | 697 | |
8de1edce | 698 | if (run_command_dot_com) |
c5958e82 ÓF |
699 | { |
700 | _snprintf (p, remlen, " /e:%d", envsize); | |
701 | remlen = maxlen - (p - cmdline); | |
702 | } | |
8c012929 GV |
703 | } |
704 | } | |
705 | ||
706 | if (!progname) | |
707 | fail ("Internal error: program name not defined\n"); | |
708 | ||
709 | if (!cmdline) | |
710 | cmdline = progname; | |
711 | ||
d78e84f7 | 712 | if (spawn (progname, cmdline, dir, &rc)) |
52969220 | 713 | return rc; |
8c012929 | 714 | |
52969220 GV |
715 | if (!need_shell) |
716 | { | |
717 | need_shell = TRUE; | |
718 | goto pass_to_shell; | |
719 | } | |
720 | ||
721 | fail ("Could not run %s\n", progname); | |
722 | ||
723 | return 0; | |
8c012929 | 724 | } |
ab5796a9 MB |
725 | |
726 | /* arch-tag: 88678d93-07ac-4e2f-ad63-d4a740ca69ac | |
727 | (do not change this comment) */ |