Commit | Line | Data |
---|---|---|
5a17353c DD |
1 | /* Utilities to execute a program in a subprocess (possibly linked by pipes |
2 | with other subprocesses), and wait for it. Generic Win32 specialization. | |
533da483 | 3 | Copyright (C) 1996-2020 Free Software Foundation, Inc. |
5a17353c DD |
4 | |
5 | This file is part of the libiberty library. | |
6 | Libiberty is free software; you can redistribute it and/or | |
7 | modify it under the terms of the GNU Library General Public | |
8 | License as published by the Free Software Foundation; either | |
9 | version 2 of the License, or (at your option) any later version. | |
10 | ||
11 | Libiberty is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 | Library General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU Library General Public | |
17 | License along with libiberty; see the file COPYING.LIB. If not, | |
979c05d3 NC |
18 | write to the Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor, |
19 | Boston, MA 02110-1301, USA. */ | |
5a17353c DD |
20 | |
21 | #include "pex-common.h" | |
22 | ||
f59e96e0 DD |
23 | #include <windows.h> |
24 | ||
b109e79a ILT |
25 | #ifdef HAVE_STDLIB_H |
26 | #include <stdlib.h> | |
27 | #endif | |
5a17353c DD |
28 | #ifdef HAVE_STRING_H |
29 | #include <string.h> | |
30 | #endif | |
31 | #ifdef HAVE_UNISTD_H | |
32 | #include <unistd.h> | |
33 | #endif | |
34 | #ifdef HAVE_SYS_WAIT_H | |
35 | #include <sys/wait.h> | |
36 | #endif | |
37 | ||
014a8caf | 38 | #include <assert.h> |
5a17353c DD |
39 | #include <process.h> |
40 | #include <io.h> | |
41 | #include <fcntl.h> | |
42 | #include <signal.h> | |
b109e79a | 43 | #include <sys/stat.h> |
8e1e9959 | 44 | #include <errno.h> |
014a8caf | 45 | #include <ctype.h> |
5a17353c DD |
46 | |
47 | /* mingw32 headers may not define the following. */ | |
48 | ||
49 | #ifndef _P_WAIT | |
50 | # define _P_WAIT 0 | |
51 | # define _P_NOWAIT 1 | |
52 | # define _P_OVERLAY 2 | |
53 | # define _P_NOWAITO 3 | |
54 | # define _P_DETACH 4 | |
55 | ||
56 | # define WAIT_CHILD 0 | |
57 | # define WAIT_GRANDCHILD 1 | |
58 | #endif | |
59 | ||
f59e96e0 DD |
60 | #define MINGW_NAME "Minimalist GNU for Windows" |
61 | #define MINGW_NAME_LEN (sizeof(MINGW_NAME) - 1) | |
62 | ||
014a8caf DD |
63 | extern char *stpcpy (char *dst, const char *src); |
64 | ||
f59e96e0 DD |
65 | /* Ensure that the executable pathname uses Win32 backslashes. This |
66 | is not necessary on NT, but on W9x, forward slashes causes | |
67 | failure of spawn* and exec* functions (and probably any function | |
68 | that calls CreateProcess) *iff* the executable pathname (argv[0]) | |
69 | is a quoted string. And quoting is necessary in case a pathname | |
70 | contains embedded white space. You can't win. */ | |
71 | static void | |
72 | backslashify (char *s) | |
73 | { | |
74 | while ((s = strchr (s, '/')) != NULL) | |
75 | *s = '\\'; | |
76 | return; | |
77 | } | |
78 | ||
b109e79a | 79 | static int pex_win32_open_read (struct pex_obj *, const char *, int); |
b55f9678 | 80 | static int pex_win32_open_write (struct pex_obj *, const char *, int, int); |
29d89e07 | 81 | static pid_t pex_win32_exec_child (struct pex_obj *, int, const char *, |
014a8caf | 82 | char * const *, char * const *, |
cb6c09ac | 83 | int, int, int, int, |
b109e79a ILT |
84 | const char **, int *); |
85 | static int pex_win32_close (struct pex_obj *, int); | |
587c6b96 | 86 | static pid_t pex_win32_wait (struct pex_obj *, pid_t, int *, |
b109e79a ILT |
87 | struct pex_time *, int, const char **, int *); |
88 | static int pex_win32_pipe (struct pex_obj *, int *, int); | |
89 | static FILE *pex_win32_fdopenr (struct pex_obj *, int, int); | |
3db2e6dd | 90 | static FILE *pex_win32_fdopenw (struct pex_obj *, int, int); |
b109e79a ILT |
91 | |
92 | /* The list of functions we pass to the common routines. */ | |
93 | ||
94 | const struct pex_funcs funcs = | |
5a17353c | 95 | { |
b109e79a ILT |
96 | pex_win32_open_read, |
97 | pex_win32_open_write, | |
98 | pex_win32_exec_child, | |
99 | pex_win32_close, | |
100 | pex_win32_wait, | |
101 | pex_win32_pipe, | |
102 | pex_win32_fdopenr, | |
3db2e6dd | 103 | pex_win32_fdopenw, |
b109e79a ILT |
104 | NULL /* cleanup */ |
105 | }; | |
106 | ||
107 | /* Return a newly initialized pex_obj structure. */ | |
108 | ||
109 | struct pex_obj * | |
110 | pex_init (int flags, const char *pname, const char *tempbase) | |
111 | { | |
112 | return pex_init_common (flags, pname, tempbase, &funcs); | |
113 | } | |
114 | ||
115 | /* Open a file for reading. */ | |
116 | ||
117 | static int | |
118 | pex_win32_open_read (struct pex_obj *obj ATTRIBUTE_UNUSED, const char *name, | |
119 | int binary) | |
120 | { | |
121 | return _open (name, _O_RDONLY | (binary ? _O_BINARY : _O_TEXT)); | |
122 | } | |
123 | ||
124 | /* Open a file for writing. */ | |
125 | ||
126 | static int | |
127 | pex_win32_open_write (struct pex_obj *obj ATTRIBUTE_UNUSED, const char *name, | |
b55f9678 | 128 | int binary, int append) |
b109e79a ILT |
129 | { |
130 | /* Note that we can't use O_EXCL here because gcc may have already | |
131 | created the temporary file via make_temp_file. */ | |
b55f9678 IB |
132 | if (append) |
133 | return -1; | |
b109e79a ILT |
134 | return _open (name, |
135 | (_O_WRONLY | _O_CREAT | _O_TRUNC | |
136 | | (binary ? _O_BINARY : _O_TEXT)), | |
137 | _S_IREAD | _S_IWRITE); | |
138 | } | |
139 | ||
140 | /* Close a file. */ | |
141 | ||
142 | static int | |
143 | pex_win32_close (struct pex_obj *obj ATTRIBUTE_UNUSED, int fd) | |
144 | { | |
145 | return _close (fd); | |
146 | } | |
147 | ||
f59e96e0 DD |
148 | #ifdef USE_MINGW_MSYS |
149 | static const char *mingw_keys[] = {"SOFTWARE", "Microsoft", "Windows", "CurrentVersion", "Uninstall", NULL}; | |
150 | ||
151 | /* Tack the executable on the end of a (possibly slash terminated) buffer | |
152 | and convert everything to \. */ | |
153 | static const char * | |
154 | tack_on_executable (char *buf, const char *executable) | |
155 | { | |
156 | char *p = strchr (buf, '\0'); | |
157 | if (p > buf && (p[-1] == '\\' || p[-1] == '/')) | |
158 | p[-1] = '\0'; | |
159 | backslashify (strcat (buf, executable)); | |
160 | return buf; | |
161 | } | |
162 | ||
163 | /* Walk down a registry hierarchy until the end. Return the key. */ | |
164 | static HKEY | |
165 | openkey (HKEY hStart, const char *keys[]) | |
166 | { | |
167 | HKEY hKey, hTmp; | |
168 | for (hKey = hStart; *keys; keys++) | |
169 | { | |
170 | LONG res; | |
171 | hTmp = hKey; | |
172 | res = RegOpenKey (hTmp, *keys, &hKey); | |
173 | ||
174 | if (hTmp != HKEY_LOCAL_MACHINE) | |
175 | RegCloseKey (hTmp); | |
176 | ||
177 | if (res != ERROR_SUCCESS) | |
178 | return NULL; | |
179 | } | |
180 | return hKey; | |
181 | } | |
182 | ||
183 | /* Return the "mingw root" as derived from the mingw uninstall information. */ | |
184 | static const char * | |
185 | mingw_rootify (const char *executable) | |
186 | { | |
187 | HKEY hKey, hTmp; | |
188 | DWORD maxlen; | |
189 | char *namebuf, *foundbuf; | |
190 | DWORD i; | |
191 | LONG res; | |
192 | ||
193 | /* Open the uninstall "directory". */ | |
194 | hKey = openkey (HKEY_LOCAL_MACHINE, mingw_keys); | |
195 | ||
196 | /* Not found. */ | |
197 | if (!hKey) | |
198 | return executable; | |
199 | ||
200 | /* Need to enumerate all of the keys here looking for one the most recent | |
201 | one for MinGW. */ | |
202 | if (RegQueryInfoKey (hKey, NULL, NULL, NULL, NULL, &maxlen, NULL, NULL, | |
203 | NULL, NULL, NULL, NULL) != ERROR_SUCCESS) | |
204 | { | |
205 | RegCloseKey (hKey); | |
206 | return executable; | |
207 | } | |
208 | namebuf = XNEWVEC (char, ++maxlen); | |
209 | foundbuf = XNEWVEC (char, maxlen); | |
210 | foundbuf[0] = '\0'; | |
211 | if (!namebuf || !foundbuf) | |
212 | { | |
213 | RegCloseKey (hKey); | |
4ff224cb DD |
214 | free (namebuf); |
215 | free (foundbuf); | |
f59e96e0 DD |
216 | return executable; |
217 | } | |
218 | ||
219 | /* Look through all of the keys for one that begins with Minimal GNU... | |
220 | Try to get the latest version by doing a string compare although that | |
221 | string never really works with version number sorting. */ | |
222 | for (i = 0; RegEnumKey (hKey, i, namebuf, maxlen) == ERROR_SUCCESS; i++) | |
223 | { | |
224 | int match = strcasecmp (namebuf, MINGW_NAME); | |
225 | if (match < 0) | |
226 | continue; | |
227 | if (match > 0 && strncasecmp (namebuf, MINGW_NAME, MINGW_NAME_LEN) > 0) | |
228 | continue; | |
229 | if (strcasecmp (namebuf, foundbuf) > 0) | |
230 | strcpy (foundbuf, namebuf); | |
231 | } | |
232 | free (namebuf); | |
233 | ||
234 | /* If foundbuf is empty, we didn't find anything. Punt. */ | |
235 | if (!foundbuf[0]) | |
236 | { | |
237 | free (foundbuf); | |
238 | RegCloseKey (hKey); | |
239 | return executable; | |
240 | } | |
241 | ||
242 | /* Open the key that we wanted */ | |
243 | res = RegOpenKey (hKey, foundbuf, &hTmp); | |
244 | RegCloseKey (hKey); | |
245 | free (foundbuf); | |
246 | ||
247 | /* Don't know why this would fail, but you gotta check */ | |
248 | if (res != ERROR_SUCCESS) | |
249 | return executable; | |
250 | ||
251 | maxlen = 0; | |
252 | /* Get the length of the value pointed to by InstallLocation */ | |
253 | if (RegQueryValueEx (hTmp, "InstallLocation", 0, NULL, NULL, | |
254 | &maxlen) != ERROR_SUCCESS || maxlen == 0) | |
255 | { | |
256 | RegCloseKey (hTmp); | |
257 | return executable; | |
258 | } | |
259 | ||
260 | /* Allocate space for the install location */ | |
261 | foundbuf = XNEWVEC (char, maxlen + strlen (executable)); | |
262 | if (!foundbuf) | |
263 | { | |
264 | free (foundbuf); | |
265 | RegCloseKey (hTmp); | |
266 | } | |
267 | ||
268 | /* Read the install location into the buffer */ | |
269 | res = RegQueryValueEx (hTmp, "InstallLocation", 0, NULL, (LPBYTE) foundbuf, | |
270 | &maxlen); | |
271 | RegCloseKey (hTmp); | |
272 | if (res != ERROR_SUCCESS) | |
273 | { | |
274 | free (foundbuf); | |
275 | return executable; | |
276 | } | |
277 | ||
278 | /* Concatenate the install location and the executable, turn all slashes | |
279 | to backslashes, and return that. */ | |
280 | return tack_on_executable (foundbuf, executable); | |
281 | } | |
282 | ||
283 | /* Read the install location of msys from it's installation file and | |
284 | rootify the executable based on that. */ | |
285 | static const char * | |
286 | msys_rootify (const char *executable) | |
287 | { | |
288 | size_t bufsize = 64; | |
289 | size_t execlen = strlen (executable) + 1; | |
290 | char *buf; | |
291 | DWORD res = 0; | |
292 | for (;;) | |
293 | { | |
294 | buf = XNEWVEC (char, bufsize + execlen); | |
295 | if (!buf) | |
296 | break; | |
297 | res = GetPrivateProfileString ("InstallSettings", "InstallPath", NULL, | |
298 | buf, bufsize, "msys.ini"); | |
299 | if (!res) | |
300 | break; | |
301 | if (strlen (buf) < bufsize) | |
302 | break; | |
303 | res = 0; | |
304 | free (buf); | |
305 | bufsize *= 2; | |
306 | if (bufsize > 65536) | |
307 | { | |
308 | buf = NULL; | |
309 | break; | |
310 | } | |
311 | } | |
312 | ||
313 | if (res) | |
314 | return tack_on_executable (buf, executable); | |
315 | ||
316 | /* failed */ | |
4ff224cb | 317 | free (buf); |
f59e96e0 DD |
318 | return executable; |
319 | } | |
320 | #endif | |
321 | ||
bd8aab1c DD |
322 | /* Return the number of arguments in an argv array, not including the null |
323 | terminating argument. */ | |
324 | ||
325 | static int | |
326 | argv_to_argc (char *const *argv) | |
327 | { | |
328 | char *const *i = argv; | |
329 | while (*i) | |
330 | i++; | |
331 | return i - argv; | |
332 | } | |
333 | ||
8e1e9959 DD |
334 | /* Return a Windows command-line from ARGV. It is the caller's |
335 | responsibility to free the string returned. */ | |
336 | ||
337 | static char * | |
338 | argv_to_cmdline (char *const *argv) | |
339 | { | |
340 | char *cmdline; | |
341 | char *p; | |
342 | size_t cmdline_len; | |
343 | int i, j, k; | |
f69123aa | 344 | int needs_quotes; |
8e1e9959 DD |
345 | |
346 | cmdline_len = 0; | |
347 | for (i = 0; argv[i]; i++) | |
348 | { | |
f69123aa KT |
349 | /* We only quote arguments that contain spaces, \t or " characters to |
350 | prevent wasting 2 chars per argument of the CreateProcess 32k char | |
351 | limit. We need only escape embedded double-quotes and immediately | |
8e1e9959 DD |
352 | preceeding backslash characters. A sequence of backslach characters |
353 | that is not follwed by a double quote character will not be | |
354 | escaped. */ | |
f69123aa | 355 | needs_quotes = 0; |
8e1e9959 DD |
356 | for (j = 0; argv[i][j]; j++) |
357 | { | |
f69123aa KT |
358 | if (argv[i][j] == ' ' || argv[i][j] == '\t' || argv[i][j] == '"') |
359 | { | |
360 | needs_quotes = 1; | |
361 | } | |
362 | ||
8e1e9959 DD |
363 | if (argv[i][j] == '"') |
364 | { | |
365 | /* Escape preceeding backslashes. */ | |
366 | for (k = j - 1; k >= 0 && argv[i][k] == '\\'; k--) | |
367 | cmdline_len++; | |
368 | /* Escape the qote character. */ | |
369 | cmdline_len++; | |
370 | } | |
371 | } | |
41f225de NC |
372 | if (j == 0) |
373 | needs_quotes = 1; | |
8e1e9959 DD |
374 | /* Trailing backslashes also need to be escaped because they will be |
375 | followed by the terminating quote. */ | |
f69123aa KT |
376 | if (needs_quotes) |
377 | { | |
378 | for (k = j - 1; k >= 0 && argv[i][k] == '\\'; k--) | |
379 | cmdline_len++; | |
380 | } | |
8e1e9959 | 381 | cmdline_len += j; |
f69123aa KT |
382 | /* for leading and trailing quotes and space */ |
383 | cmdline_len += needs_quotes * 2 + 1; | |
8e1e9959 | 384 | } |
3ac01eb2 | 385 | cmdline = XNEWVEC (char, cmdline_len); |
8e1e9959 DD |
386 | p = cmdline; |
387 | for (i = 0; argv[i]; i++) | |
388 | { | |
f69123aa KT |
389 | needs_quotes = 0; |
390 | for (j = 0; argv[i][j]; j++) | |
391 | { | |
392 | if (argv[i][j] == ' ' || argv[i][j] == '\t' || argv[i][j] == '"') | |
393 | { | |
394 | needs_quotes = 1; | |
395 | break; | |
396 | } | |
397 | } | |
41f225de NC |
398 | if (j == 0) |
399 | needs_quotes = 1; | |
f69123aa KT |
400 | |
401 | if (needs_quotes) | |
402 | { | |
403 | *p++ = '"'; | |
404 | } | |
8e1e9959 DD |
405 | for (j = 0; argv[i][j]; j++) |
406 | { | |
407 | if (argv[i][j] == '"') | |
408 | { | |
409 | for (k = j - 1; k >= 0 && argv[i][k] == '\\'; k--) | |
410 | *p++ = '\\'; | |
411 | *p++ = '\\'; | |
412 | } | |
413 | *p++ = argv[i][j]; | |
414 | } | |
f69123aa KT |
415 | if (needs_quotes) |
416 | { | |
417 | for (k = j - 1; k >= 0 && argv[i][k] == '\\'; k--) | |
418 | *p++ = '\\'; | |
419 | *p++ = '"'; | |
420 | } | |
8e1e9959 DD |
421 | *p++ = ' '; |
422 | } | |
423 | p[-1] = '\0'; | |
424 | return cmdline; | |
425 | } | |
426 | ||
fb347196 VP |
427 | /* We'll try the passed filename with all the known standard |
428 | extensions, and then without extension. We try no extension | |
429 | last so that we don't try to run some random extension-less | |
430 | file that might be hanging around. We try both extension | |
431 | and no extension so that we don't need any fancy logic | |
432 | to determine if a file has extension. */ | |
8e1e9959 DD |
433 | static const char *const |
434 | std_suffixes[] = { | |
435 | ".com", | |
436 | ".exe", | |
437 | ".bat", | |
438 | ".cmd", | |
8e1e9959 DD |
439 | "", |
440 | 0 | |
441 | }; | |
442 | ||
443 | /* Returns the full path to PROGRAM. If SEARCH is true, look for | |
444 | PROGRAM in each directory in PATH. */ | |
445 | ||
446 | static char * | |
447 | find_executable (const char *program, BOOL search) | |
448 | { | |
449 | char *full_executable; | |
450 | char *e; | |
451 | size_t fe_len; | |
452 | const char *path = 0; | |
453 | const char *const *ext; | |
454 | const char *p, *q; | |
455 | size_t proglen = strlen (program); | |
8e1e9959 DD |
456 | int has_slash = (strchr (program, '/') || strchr (program, '\\')); |
457 | HANDLE h; | |
458 | ||
459 | if (has_slash) | |
460 | search = FALSE; | |
461 | ||
462 | if (search) | |
463 | path = getenv ("PATH"); | |
464 | if (!path) | |
465 | path = ""; | |
466 | ||
467 | fe_len = 0; | |
468 | for (p = path; *p; p = q) | |
469 | { | |
470 | q = p; | |
471 | while (*q != ';' && *q != '\0') | |
472 | q++; | |
473 | if ((size_t)(q - p) > fe_len) | |
474 | fe_len = q - p; | |
475 | if (*q == ';') | |
476 | q++; | |
477 | } | |
fb347196 | 478 | fe_len = fe_len + 1 + proglen + 5 /* space for extension */; |
3ac01eb2 | 479 | full_executable = XNEWVEC (char, fe_len); |
8e1e9959 DD |
480 | |
481 | p = path; | |
482 | do | |
483 | { | |
484 | q = p; | |
485 | while (*q != ';' && *q != '\0') | |
486 | q++; | |
487 | ||
488 | e = full_executable; | |
489 | memcpy (e, p, q - p); | |
490 | e += (q - p); | |
491 | if (q - p) | |
492 | *e++ = '\\'; | |
493 | strcpy (e, program); | |
494 | ||
495 | if (*q == ';') | |
496 | q++; | |
497 | ||
498 | for (e = full_executable; *e; e++) | |
499 | if (*e == '/') | |
500 | *e = '\\'; | |
501 | ||
502 | /* At this point, e points to the terminating NUL character for | |
503 | full_executable. */ | |
fb347196 | 504 | for (ext = std_suffixes; *ext; ext++) |
8e1e9959 DD |
505 | { |
506 | /* Remove any current extension. */ | |
507 | *e = '\0'; | |
508 | /* Add the new one. */ | |
509 | strcat (full_executable, *ext); | |
510 | ||
511 | /* Attempt to open this file. */ | |
512 | h = CreateFile (full_executable, GENERIC_READ, | |
513 | FILE_SHARE_READ | FILE_SHARE_WRITE, | |
514 | 0, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, 0); | |
515 | if (h != INVALID_HANDLE_VALUE) | |
516 | goto found; | |
517 | } | |
518 | p = q; | |
519 | } | |
520 | while (*p); | |
521 | free (full_executable); | |
522 | return 0; | |
523 | ||
524 | found: | |
525 | CloseHandle (h); | |
526 | return full_executable; | |
527 | } | |
528 | ||
014a8caf DD |
529 | /* Low-level process creation function and helper. */ |
530 | ||
531 | static int | |
532 | env_compare (const void *a_ptr, const void *b_ptr) | |
533 | { | |
534 | const char *a; | |
535 | const char *b; | |
536 | unsigned char c1; | |
537 | unsigned char c2; | |
538 | ||
539 | a = *(const char **) a_ptr; | |
540 | b = *(const char **) b_ptr; | |
541 | ||
542 | /* a and b will be of the form: VAR=VALUE | |
543 | We compare only the variable name part here using a case-insensitive | |
544 | comparison algorithm. It might appear that in fact strcasecmp () can | |
545 | take the place of this whole function, and indeed it could, save for | |
546 | the fact that it would fail in cases such as comparing A1=foo and | |
547 | A=bar (because 1 is less than = in the ASCII character set). | |
548 | (Environment variables containing no numbers would work in such a | |
549 | scenario.) */ | |
550 | ||
551 | do | |
552 | { | |
553 | c1 = (unsigned char) tolower (*a++); | |
554 | c2 = (unsigned char) tolower (*b++); | |
555 | ||
556 | if (c1 == '=') | |
557 | c1 = '\0'; | |
558 | ||
559 | if (c2 == '=') | |
560 | c2 = '\0'; | |
561 | } | |
562 | while (c1 == c2 && c1 != '\0'); | |
563 | ||
564 | return c1 - c2; | |
565 | } | |
8e1e9959 | 566 | |
bd8aab1c DD |
567 | /* Execute a Windows executable as a child process. This will fail if the |
568 | * target is not actually an executable, such as if it is a shell script. */ | |
569 | ||
29d89e07 | 570 | static pid_t |
8e1e9959 DD |
571 | win32_spawn (const char *executable, |
572 | BOOL search, | |
573 | char *const *argv, | |
014a8caf | 574 | char *const *env, /* array of strings of the form: VAR=VALUE */ |
8e1e9959 DD |
575 | DWORD dwCreationFlags, |
576 | LPSTARTUPINFO si, | |
577 | LPPROCESS_INFORMATION pi) | |
578 | { | |
579 | char *full_executable; | |
580 | char *cmdline; | |
014a8caf DD |
581 | char **env_copy; |
582 | char *env_block = NULL; | |
8e1e9959 DD |
583 | |
584 | full_executable = NULL; | |
585 | cmdline = NULL; | |
586 | ||
014a8caf DD |
587 | if (env) |
588 | { | |
589 | int env_size; | |
590 | ||
591 | /* Count the number of environment bindings supplied. */ | |
592 | for (env_size = 0; env[env_size]; env_size++) | |
593 | continue; | |
594 | ||
595 | /* Assemble an environment block, if required. This consists of | |
596 | VAR=VALUE strings juxtaposed (with one null character between each | |
597 | pair) and an additional null at the end. */ | |
598 | if (env_size > 0) | |
599 | { | |
600 | int var; | |
601 | int total_size = 1; /* 1 is for the final null. */ | |
602 | char *bufptr; | |
603 | ||
604 | /* Windows needs the members of the block to be sorted by variable | |
605 | name. */ | |
3ac01eb2 | 606 | env_copy = (char **) alloca (sizeof (char *) * env_size); |
014a8caf DD |
607 | memcpy (env_copy, env, sizeof (char *) * env_size); |
608 | qsort (env_copy, env_size, sizeof (char *), env_compare); | |
609 | ||
610 | for (var = 0; var < env_size; var++) | |
611 | total_size += strlen (env[var]) + 1; | |
612 | ||
3ac01eb2 | 613 | env_block = XNEWVEC (char, total_size); |
014a8caf DD |
614 | bufptr = env_block; |
615 | for (var = 0; var < env_size; var++) | |
616 | bufptr = stpcpy (bufptr, env_copy[var]) + 1; | |
617 | ||
618 | *bufptr = '\0'; | |
619 | } | |
620 | } | |
621 | ||
8e1e9959 DD |
622 | full_executable = find_executable (executable, search); |
623 | if (!full_executable) | |
624 | goto error; | |
625 | cmdline = argv_to_cmdline (argv); | |
626 | if (!cmdline) | |
627 | goto error; | |
628 | ||
629 | /* Create the child process. */ | |
630 | if (!CreateProcess (full_executable, cmdline, | |
631 | /*lpProcessAttributes=*/NULL, | |
632 | /*lpThreadAttributes=*/NULL, | |
633 | /*bInheritHandles=*/TRUE, | |
634 | dwCreationFlags, | |
014a8caf | 635 | (LPVOID) env_block, |
8e1e9959 DD |
636 | /*lpCurrentDirectory=*/NULL, |
637 | si, | |
638 | pi)) | |
639 | { | |
4ff224cb | 640 | free (env_block); |
014a8caf | 641 | |
8e1e9959 | 642 | free (full_executable); |
014a8caf | 643 | |
29d89e07 | 644 | return (pid_t) -1; |
8e1e9959 DD |
645 | } |
646 | ||
647 | /* Clean up. */ | |
648 | CloseHandle (pi->hThread); | |
649 | free (full_executable); | |
4ff224cb | 650 | free (env_block); |
8e1e9959 | 651 | |
29d89e07 | 652 | return (pid_t) pi->hProcess; |
8e1e9959 DD |
653 | |
654 | error: | |
4ff224cb DD |
655 | free (env_block); |
656 | free (cmdline); | |
657 | free (full_executable); | |
014a8caf | 658 | |
29d89e07 | 659 | return (pid_t) -1; |
8e1e9959 DD |
660 | } |
661 | ||
bd8aab1c DD |
662 | /* Spawn a script. This simulates the Unix script execution mechanism. |
663 | This function is called as a fallback if win32_spawn fails. */ | |
664 | ||
29d89e07 | 665 | static pid_t |
8e1e9959 | 666 | spawn_script (const char *executable, char *const *argv, |
014a8caf | 667 | char* const *env, |
8e1e9959 DD |
668 | DWORD dwCreationFlags, |
669 | LPSTARTUPINFO si, | |
670 | LPPROCESS_INFORMATION pi) | |
f59e96e0 | 671 | { |
29d89e07 | 672 | pid_t pid = (pid_t) -1; |
f59e96e0 DD |
673 | int save_errno = errno; |
674 | int fd = _open (executable, _O_RDONLY); | |
675 | ||
bd8aab1c DD |
676 | /* Try to open script, check header format, extract interpreter path, |
677 | and spawn script using that interpretter. */ | |
f59e96e0 DD |
678 | if (fd >= 0) |
679 | { | |
680 | char buf[MAX_PATH + 5]; | |
681 | int len = _read (fd, buf, sizeof (buf) - 1); | |
682 | _close (fd); | |
683 | if (len > 3) | |
684 | { | |
685 | char *eol; | |
686 | buf[len] = '\0'; | |
687 | eol = strchr (buf, '\n'); | |
688 | if (eol && strncmp (buf, "#!", 2) == 0) | |
689 | { | |
bd8aab1c DD |
690 | |
691 | /* Header format is OK. */ | |
f59e96e0 | 692 | char *executable1; |
bd8aab1c DD |
693 | int new_argc; |
694 | const char **avhere; | |
695 | ||
696 | /* Extract interpreter path. */ | |
f59e96e0 DD |
697 | do |
698 | *eol = '\0'; | |
699 | while (*--eol == '\r' || *eol == ' ' || *eol == '\t'); | |
700 | for (executable1 = buf + 2; *executable1 == ' ' || *executable1 == '\t'; executable1++) | |
701 | continue; | |
f59e96e0 | 702 | backslashify (executable1); |
bd8aab1c DD |
703 | |
704 | /* Duplicate argv, prepending the interpreter path. */ | |
705 | new_argc = argv_to_argc (argv) + 1; | |
706 | avhere = XNEWVEC (const char *, new_argc + 1); | |
f59e96e0 | 707 | *avhere = executable1; |
bd8aab1c DD |
708 | memcpy (avhere + 1, argv, new_argc * sizeof(*argv)); |
709 | argv = (char *const *)avhere; | |
710 | ||
711 | /* Spawn the child. */ | |
f59e96e0 DD |
712 | #ifndef USE_MINGW_MSYS |
713 | executable = strrchr (executable1, '\\') + 1; | |
714 | if (!executable) | |
715 | executable = executable1; | |
014a8caf | 716 | pid = win32_spawn (executable, TRUE, argv, env, |
8e1e9959 | 717 | dwCreationFlags, si, pi); |
f59e96e0 DD |
718 | #else |
719 | if (strchr (executable1, '\\') == NULL) | |
014a8caf | 720 | pid = win32_spawn (executable1, TRUE, argv, env, |
8e1e9959 | 721 | dwCreationFlags, si, pi); |
f59e96e0 | 722 | else if (executable1[0] != '\\') |
014a8caf | 723 | pid = win32_spawn (executable1, FALSE, argv, env, |
8e1e9959 | 724 | dwCreationFlags, si, pi); |
f59e96e0 DD |
725 | else |
726 | { | |
727 | const char *newex = mingw_rootify (executable1); | |
728 | *avhere = newex; | |
014a8caf | 729 | pid = win32_spawn (newex, FALSE, argv, env, |
8e1e9959 | 730 | dwCreationFlags, si, pi); |
f59e96e0 DD |
731 | if (executable1 != newex) |
732 | free ((char *) newex); | |
587c6b96 | 733 | if (pid == (pid_t) -1) |
f59e96e0 DD |
734 | { |
735 | newex = msys_rootify (executable1); | |
736 | if (newex != executable1) | |
737 | { | |
738 | *avhere = newex; | |
014a8caf | 739 | pid = win32_spawn (newex, FALSE, argv, env, |
8e1e9959 | 740 | dwCreationFlags, si, pi); |
f59e96e0 DD |
741 | free ((char *) newex); |
742 | } | |
743 | } | |
744 | } | |
745 | #endif | |
bd8aab1c | 746 | free (avhere); |
f59e96e0 DD |
747 | } |
748 | } | |
749 | } | |
587c6b96 | 750 | if (pid == (pid_t) -1) |
f59e96e0 DD |
751 | errno = save_errno; |
752 | return pid; | |
753 | } | |
754 | ||
b109e79a ILT |
755 | /* Execute a child. */ |
756 | ||
29d89e07 | 757 | static pid_t |
b109e79a ILT |
758 | pex_win32_exec_child (struct pex_obj *obj ATTRIBUTE_UNUSED, int flags, |
759 | const char *executable, char * const * argv, | |
014a8caf | 760 | char* const* env, |
cb6c09ac DD |
761 | int in, int out, int errdes, |
762 | int toclose ATTRIBUTE_UNUSED, | |
763 | const char **errmsg, | |
b109e79a ILT |
764 | int *err) |
765 | { | |
29d89e07 | 766 | pid_t pid; |
8e1e9959 DD |
767 | HANDLE stdin_handle; |
768 | HANDLE stdout_handle; | |
769 | HANDLE stderr_handle; | |
770 | DWORD dwCreationFlags; | |
771 | OSVERSIONINFO version_info; | |
772 | STARTUPINFO si; | |
773 | PROCESS_INFORMATION pi; | |
59cdf842 JB |
774 | int orig_out, orig_in, orig_err; |
775 | BOOL separate_stderr = !(flags & PEX_STDERR_TO_STDOUT); | |
776 | ||
9974286e | 777 | /* Ensure we have inheritable descriptors to pass to the child. */ |
59cdf842 JB |
778 | orig_in = in; |
779 | in = _dup (orig_in); | |
59cdf842 JB |
780 | |
781 | orig_out = out; | |
782 | out = _dup (orig_out); | |
59cdf842 JB |
783 | |
784 | if (separate_stderr) | |
785 | { | |
786 | orig_err = errdes; | |
787 | errdes = _dup (orig_err); | |
59cdf842 | 788 | } |
8e1e9959 DD |
789 | |
790 | stdin_handle = INVALID_HANDLE_VALUE; | |
791 | stdout_handle = INVALID_HANDLE_VALUE; | |
792 | stderr_handle = INVALID_HANDLE_VALUE; | |
793 | ||
794 | stdin_handle = (HANDLE) _get_osfhandle (in); | |
795 | stdout_handle = (HANDLE) _get_osfhandle (out); | |
59cdf842 | 796 | if (separate_stderr) |
8e1e9959 DD |
797 | stderr_handle = (HANDLE) _get_osfhandle (errdes); |
798 | else | |
799 | stderr_handle = stdout_handle; | |
800 | ||
801 | /* Determine the version of Windows we are running on. */ | |
802 | version_info.dwOSVersionInfoSize = sizeof (version_info); | |
803 | GetVersionEx (&version_info); | |
804 | if (version_info.dwPlatformId == VER_PLATFORM_WIN32_WINDOWS) | |
805 | /* On Windows 95/98/ME the CREATE_NO_WINDOW flag is not | |
806 | supported, so we cannot avoid creating a console window. */ | |
807 | dwCreationFlags = 0; | |
808 | else | |
5a17353c | 809 | { |
8e1e9959 DD |
810 | HANDLE conout_handle; |
811 | ||
812 | /* Determine whether or not we have an associated console. */ | |
813 | conout_handle = CreateFile("CONOUT$", | |
814 | GENERIC_WRITE, | |
815 | FILE_SHARE_WRITE, | |
816 | /*lpSecurityAttributes=*/NULL, | |
817 | OPEN_EXISTING, | |
818 | FILE_ATTRIBUTE_NORMAL, | |
819 | /*hTemplateFile=*/NULL); | |
820 | if (conout_handle == INVALID_HANDLE_VALUE) | |
821 | /* There is no console associated with this process. Since | |
822 | the child is a console process, the OS would normally | |
823 | create a new console Window for the child. Since we'll be | |
824 | redirecting the child's standard streams, we do not need | |
825 | the console window. */ | |
826 | dwCreationFlags = CREATE_NO_WINDOW; | |
827 | else | |
b109e79a | 828 | { |
8e1e9959 DD |
829 | /* There is a console associated with the process, so the OS |
830 | will not create a new console. And, if we use | |
831 | CREATE_NO_WINDOW in this situation, the child will have | |
832 | no associated console. Therefore, if the child's | |
833 | standard streams are connected to the console, the output | |
834 | will be discarded. */ | |
835 | CloseHandle(conout_handle); | |
836 | dwCreationFlags = 0; | |
b109e79a | 837 | } |
5a17353c DD |
838 | } |
839 | ||
8e1e9959 DD |
840 | /* Since the child will be a console process, it will, by default, |
841 | connect standard input/output to its console. However, we want | |
842 | the child to use the handles specifically designated above. In | |
843 | addition, if there is no console (such as when we are running in | |
844 | a Cygwin X window), then we must redirect the child's | |
845 | input/output, as there is no console for the child to use. */ | |
846 | memset (&si, 0, sizeof (si)); | |
847 | si.cb = sizeof (si); | |
848 | si.dwFlags = STARTF_USESTDHANDLES; | |
849 | si.hStdInput = stdin_handle; | |
850 | si.hStdOutput = stdout_handle; | |
851 | si.hStdError = stderr_handle; | |
852 | ||
853 | /* Create the child process. */ | |
854 | pid = win32_spawn (executable, (flags & PEX_SEARCH) != 0, | |
014a8caf | 855 | argv, env, dwCreationFlags, &si, &pi); |
29d89e07 | 856 | if (pid == (pid_t) -1) |
014a8caf DD |
857 | pid = spawn_script (executable, argv, env, dwCreationFlags, |
858 | &si, &pi); | |
29d89e07 | 859 | if (pid == (pid_t) -1) |
5a17353c | 860 | { |
8e1e9959 DD |
861 | *err = ENOENT; |
862 | *errmsg = "CreateProcess"; | |
5a17353c DD |
863 | } |
864 | ||
9974286e DD |
865 | /* If the child was created successfully, close the original file |
866 | descriptors. If the process creation fails, these are closed by | |
867 | pex_run_in_environment instead. We must not close them twice as | |
868 | that seems to cause a Windows exception. */ | |
869 | ||
870 | if (pid != (pid_t) -1) | |
871 | { | |
872 | if (orig_in != STDIN_FILENO) | |
873 | _close (orig_in); | |
874 | if (orig_out != STDOUT_FILENO) | |
875 | _close (orig_out); | |
876 | if (separate_stderr | |
877 | && orig_err != STDERR_FILENO) | |
878 | _close (orig_err); | |
879 | } | |
880 | ||
59cdf842 JB |
881 | /* Close the standard input, standard output and standard error handles |
882 | in the parent. */ | |
883 | ||
ed20019d JB |
884 | _close (in); |
885 | _close (out); | |
886 | if (separate_stderr) | |
59cdf842 | 887 | _close (errdes); |
5a17353c DD |
888 | |
889 | return pid; | |
890 | } | |
891 | ||
b109e79a ILT |
892 | /* Wait for a child process to complete. MS CRTDLL doesn't return |
893 | enough information in status to decide if the child exited due to a | |
894 | signal or not, rather it simply returns an integer with the exit | |
895 | code of the child; eg., if the child exited with an abort() call | |
896 | and didn't have a handler for SIGABRT, it simply returns with | |
897 | status == 3. We fix the status code to conform to the usual WIF* | |
898 | macros. Note that WIFSIGNALED will never be true under CRTDLL. */ | |
899 | ||
587c6b96 | 900 | static pid_t |
29d89e07 | 901 | pex_win32_wait (struct pex_obj *obj ATTRIBUTE_UNUSED, pid_t pid, |
b109e79a ILT |
902 | int *status, struct pex_time *time, int done ATTRIBUTE_UNUSED, |
903 | const char **errmsg, int *err) | |
5a17353c | 904 | { |
8e1e9959 DD |
905 | DWORD termstat; |
906 | HANDLE h; | |
5a17353c | 907 | |
b109e79a ILT |
908 | if (time != NULL) |
909 | memset (time, 0, sizeof *time); | |
910 | ||
8e1e9959 DD |
911 | h = (HANDLE) pid; |
912 | ||
b109e79a ILT |
913 | /* FIXME: If done is non-zero, we should probably try to kill the |
914 | process. */ | |
8e1e9959 | 915 | if (WaitForSingleObject (h, INFINITE) != WAIT_OBJECT_0) |
b109e79a | 916 | { |
8e1e9959 DD |
917 | CloseHandle (h); |
918 | *err = ECHILD; | |
919 | *errmsg = "WaitForSingleObject"; | |
b109e79a ILT |
920 | return -1; |
921 | } | |
5a17353c | 922 | |
8e1e9959 DD |
923 | GetExitCodeProcess (h, &termstat); |
924 | CloseHandle (h); | |
925 | ||
926 | /* A value of 3 indicates that the child caught a signal, but not | |
927 | which one. Since only SIGABRT, SIGFPE and SIGINT do anything, we | |
928 | report SIGABRT. */ | |
5a17353c DD |
929 | if (termstat == 3) |
930 | *status = SIGABRT; | |
931 | else | |
8e1e9959 | 932 | *status = (termstat & 0xff) << 8; |
5a17353c | 933 | |
b109e79a ILT |
934 | return 0; |
935 | } | |
936 | ||
937 | /* Create a pipe. */ | |
938 | ||
939 | static int | |
940 | pex_win32_pipe (struct pex_obj *obj ATTRIBUTE_UNUSED, int *p, | |
941 | int binary) | |
942 | { | |
59cdf842 | 943 | return _pipe (p, 256, (binary ? _O_BINARY : _O_TEXT) | _O_NOINHERIT); |
b109e79a ILT |
944 | } |
945 | ||
946 | /* Get a FILE pointer to read from a file descriptor. */ | |
947 | ||
948 | static FILE * | |
949 | pex_win32_fdopenr (struct pex_obj *obj ATTRIBUTE_UNUSED, int fd, | |
950 | int binary) | |
951 | { | |
b69c3c55 KT |
952 | HANDLE h = (HANDLE) _get_osfhandle (fd); |
953 | if (h == INVALID_HANDLE_VALUE) | |
954 | return NULL; | |
955 | if (! SetHandleInformation (h, HANDLE_FLAG_INHERIT, 0)) | |
956 | return NULL; | |
b109e79a | 957 | return fdopen (fd, binary ? "rb" : "r"); |
5a17353c | 958 | } |
f59e96e0 | 959 | |
3db2e6dd DD |
960 | static FILE * |
961 | pex_win32_fdopenw (struct pex_obj *obj ATTRIBUTE_UNUSED, int fd, | |
962 | int binary) | |
963 | { | |
964 | HANDLE h = (HANDLE) _get_osfhandle (fd); | |
965 | if (h == INVALID_HANDLE_VALUE) | |
966 | return NULL; | |
967 | if (! SetHandleInformation (h, HANDLE_FLAG_INHERIT, 0)) | |
968 | return NULL; | |
969 | return fdopen (fd, binary ? "wb" : "w"); | |
970 | } | |
971 | ||
f59e96e0 DD |
972 | #ifdef MAIN |
973 | #include <stdio.h> | |
974 | ||
975 | int | |
976 | main (int argc ATTRIBUTE_UNUSED, char **argv) | |
977 | { | |
978 | char const *errmsg; | |
979 | int err; | |
980 | argv++; | |
29d89e07 | 981 | printf ("%ld\n", (long) pex_win32_exec_child (NULL, PEX_SEARCH, argv[0], argv, NULL, 0, 0, 1, 2, &errmsg, &err)); |
f59e96e0 DD |
982 | exit (0); |
983 | } | |
984 | #endif |