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1 | #include "../git-compat-util.h" | |
2 | #include "win32.h" | |
3 | #include "../strbuf.h" | |
4 | ||
5 | unsigned int _CRT_fmode = _O_BINARY; | |
6 | ||
7 | #undef open | |
8 | int mingw_open (const char *filename, int oflags, ...) | |
9 | { | |
10 | va_list args; | |
11 | unsigned mode; | |
12 | va_start(args, oflags); | |
13 | mode = va_arg(args, int); | |
14 | va_end(args); | |
15 | ||
16 | if (!strcmp(filename, "/dev/null")) | |
17 | filename = "nul"; | |
18 | int fd = open(filename, oflags, mode); | |
19 | if (fd < 0 && (oflags & O_CREAT) && errno == EACCES) { | |
20 | DWORD attrs = GetFileAttributes(filename); | |
21 | if (attrs != INVALID_FILE_ATTRIBUTES && (attrs & FILE_ATTRIBUTE_DIRECTORY)) | |
22 | errno = EISDIR; | |
23 | } | |
24 | return fd; | |
25 | } | |
26 | ||
27 | static inline time_t filetime_to_time_t(const FILETIME *ft) | |
28 | { | |
29 | long long winTime = ((long long)ft->dwHighDateTime << 32) + ft->dwLowDateTime; | |
30 | winTime -= 116444736000000000LL; /* Windows to Unix Epoch conversion */ | |
31 | winTime /= 10000000; /* Nano to seconds resolution */ | |
32 | return (time_t)winTime; | |
33 | } | |
34 | ||
35 | /* We keep the do_lstat code in a separate function to avoid recursion. | |
36 | * When a path ends with a slash, the stat will fail with ENOENT. In | |
37 | * this case, we strip the trailing slashes and stat again. | |
38 | */ | |
39 | static int do_lstat(const char *file_name, struct stat *buf) | |
40 | { | |
41 | WIN32_FILE_ATTRIBUTE_DATA fdata; | |
42 | ||
43 | if (!(errno = get_file_attr(file_name, &fdata))) { | |
44 | buf->st_ino = 0; | |
45 | buf->st_gid = 0; | |
46 | buf->st_uid = 0; | |
47 | buf->st_nlink = 1; | |
48 | buf->st_mode = file_attr_to_st_mode(fdata.dwFileAttributes); | |
49 | buf->st_size = fdata.nFileSizeLow | | |
50 | (((off_t)fdata.nFileSizeHigh)<<32); | |
51 | buf->st_dev = buf->st_rdev = 0; /* not used by Git */ | |
52 | buf->st_atime = filetime_to_time_t(&(fdata.ftLastAccessTime)); | |
53 | buf->st_mtime = filetime_to_time_t(&(fdata.ftLastWriteTime)); | |
54 | buf->st_ctime = filetime_to_time_t(&(fdata.ftCreationTime)); | |
55 | return 0; | |
56 | } | |
57 | return -1; | |
58 | } | |
59 | ||
60 | /* We provide our own lstat/fstat functions, since the provided | |
61 | * lstat/fstat functions are so slow. These stat functions are | |
62 | * tailored for Git's usage (read: fast), and are not meant to be | |
63 | * complete. Note that Git stat()s are redirected to mingw_lstat() | |
64 | * too, since Windows doesn't really handle symlinks that well. | |
65 | */ | |
66 | int mingw_lstat(const char *file_name, struct stat *buf) | |
67 | { | |
68 | int namelen; | |
69 | static char alt_name[PATH_MAX]; | |
70 | ||
71 | if (!do_lstat(file_name, buf)) | |
72 | return 0; | |
73 | ||
74 | /* if file_name ended in a '/', Windows returned ENOENT; | |
75 | * try again without trailing slashes | |
76 | */ | |
77 | if (errno != ENOENT) | |
78 | return -1; | |
79 | ||
80 | namelen = strlen(file_name); | |
81 | if (namelen && file_name[namelen-1] != '/') | |
82 | return -1; | |
83 | while (namelen && file_name[namelen-1] == '/') | |
84 | --namelen; | |
85 | if (!namelen || namelen >= PATH_MAX) | |
86 | return -1; | |
87 | ||
88 | memcpy(alt_name, file_name, namelen); | |
89 | alt_name[namelen] = 0; | |
90 | return do_lstat(alt_name, buf); | |
91 | } | |
92 | ||
93 | #undef fstat | |
94 | int mingw_fstat(int fd, struct stat *buf) | |
95 | { | |
96 | HANDLE fh = (HANDLE)_get_osfhandle(fd); | |
97 | BY_HANDLE_FILE_INFORMATION fdata; | |
98 | ||
99 | if (fh == INVALID_HANDLE_VALUE) { | |
100 | errno = EBADF; | |
101 | return -1; | |
102 | } | |
103 | /* direct non-file handles to MS's fstat() */ | |
104 | if (GetFileType(fh) != FILE_TYPE_DISK) | |
105 | return _fstati64(fd, buf); | |
106 | ||
107 | if (GetFileInformationByHandle(fh, &fdata)) { | |
108 | buf->st_ino = 0; | |
109 | buf->st_gid = 0; | |
110 | buf->st_uid = 0; | |
111 | buf->st_nlink = 1; | |
112 | buf->st_mode = file_attr_to_st_mode(fdata.dwFileAttributes); | |
113 | buf->st_size = fdata.nFileSizeLow | | |
114 | (((off_t)fdata.nFileSizeHigh)<<32); | |
115 | buf->st_dev = buf->st_rdev = 0; /* not used by Git */ | |
116 | buf->st_atime = filetime_to_time_t(&(fdata.ftLastAccessTime)); | |
117 | buf->st_mtime = filetime_to_time_t(&(fdata.ftLastWriteTime)); | |
118 | buf->st_ctime = filetime_to_time_t(&(fdata.ftCreationTime)); | |
119 | return 0; | |
120 | } | |
121 | errno = EBADF; | |
122 | return -1; | |
123 | } | |
124 | ||
125 | static inline void time_t_to_filetime(time_t t, FILETIME *ft) | |
126 | { | |
127 | long long winTime = t * 10000000LL + 116444736000000000LL; | |
128 | ft->dwLowDateTime = winTime; | |
129 | ft->dwHighDateTime = winTime >> 32; | |
130 | } | |
131 | ||
132 | int mingw_utime (const char *file_name, const struct utimbuf *times) | |
133 | { | |
134 | FILETIME mft, aft; | |
135 | int fh, rc; | |
136 | ||
137 | /* must have write permission */ | |
138 | if ((fh = open(file_name, O_RDWR | O_BINARY)) < 0) | |
139 | return -1; | |
140 | ||
141 | time_t_to_filetime(times->modtime, &mft); | |
142 | time_t_to_filetime(times->actime, &aft); | |
143 | if (!SetFileTime((HANDLE)_get_osfhandle(fh), NULL, &aft, &mft)) { | |
144 | errno = EINVAL; | |
145 | rc = -1; | |
146 | } else | |
147 | rc = 0; | |
148 | close(fh); | |
149 | return rc; | |
150 | } | |
151 | ||
152 | unsigned int sleep (unsigned int seconds) | |
153 | { | |
154 | Sleep(seconds*1000); | |
155 | return 0; | |
156 | } | |
157 | ||
158 | int mkstemp(char *template) | |
159 | { | |
160 | char *filename = mktemp(template); | |
161 | if (filename == NULL) | |
162 | return -1; | |
163 | return open(filename, O_RDWR | O_CREAT, 0600); | |
164 | } | |
165 | ||
166 | int gettimeofday(struct timeval *tv, void *tz) | |
167 | { | |
168 | SYSTEMTIME st; | |
169 | struct tm tm; | |
170 | GetSystemTime(&st); | |
171 | tm.tm_year = st.wYear-1900; | |
172 | tm.tm_mon = st.wMonth-1; | |
173 | tm.tm_mday = st.wDay; | |
174 | tm.tm_hour = st.wHour; | |
175 | tm.tm_min = st.wMinute; | |
176 | tm.tm_sec = st.wSecond; | |
177 | tv->tv_sec = tm_to_time_t(&tm); | |
178 | if (tv->tv_sec < 0) | |
179 | return -1; | |
180 | tv->tv_usec = st.wMilliseconds*1000; | |
181 | return 0; | |
182 | } | |
183 | ||
184 | int pipe(int filedes[2]) | |
185 | { | |
186 | int fd; | |
187 | HANDLE h[2], parent; | |
188 | ||
189 | if (_pipe(filedes, 8192, 0) < 0) | |
190 | return -1; | |
191 | ||
192 | parent = GetCurrentProcess(); | |
193 | ||
194 | if (!DuplicateHandle (parent, (HANDLE)_get_osfhandle(filedes[0]), | |
195 | parent, &h[0], 0, FALSE, DUPLICATE_SAME_ACCESS)) { | |
196 | close(filedes[0]); | |
197 | close(filedes[1]); | |
198 | return -1; | |
199 | } | |
200 | if (!DuplicateHandle (parent, (HANDLE)_get_osfhandle(filedes[1]), | |
201 | parent, &h[1], 0, FALSE, DUPLICATE_SAME_ACCESS)) { | |
202 | close(filedes[0]); | |
203 | close(filedes[1]); | |
204 | CloseHandle(h[0]); | |
205 | return -1; | |
206 | } | |
207 | fd = _open_osfhandle((int)h[0], O_NOINHERIT); | |
208 | if (fd < 0) { | |
209 | close(filedes[0]); | |
210 | close(filedes[1]); | |
211 | CloseHandle(h[0]); | |
212 | CloseHandle(h[1]); | |
213 | return -1; | |
214 | } | |
215 | close(filedes[0]); | |
216 | filedes[0] = fd; | |
217 | fd = _open_osfhandle((int)h[1], O_NOINHERIT); | |
218 | if (fd < 0) { | |
219 | close(filedes[0]); | |
220 | close(filedes[1]); | |
221 | CloseHandle(h[1]); | |
222 | return -1; | |
223 | } | |
224 | close(filedes[1]); | |
225 | filedes[1] = fd; | |
226 | return 0; | |
227 | } | |
228 | ||
229 | int poll(struct pollfd *ufds, unsigned int nfds, int timeout) | |
230 | { | |
231 | int i, pending; | |
232 | ||
233 | if (timeout >= 0) { | |
234 | if (nfds == 0) { | |
235 | Sleep(timeout); | |
236 | return 0; | |
237 | } | |
238 | return errno = EINVAL, error("poll timeout not supported"); | |
239 | } | |
240 | ||
241 | /* When there is only one fd to wait for, then we pretend that | |
242 | * input is available and let the actual wait happen when the | |
243 | * caller invokes read(). | |
244 | */ | |
245 | if (nfds == 1) { | |
246 | if (!(ufds[0].events & POLLIN)) | |
247 | return errno = EINVAL, error("POLLIN not set"); | |
248 | ufds[0].revents = POLLIN; | |
249 | return 0; | |
250 | } | |
251 | ||
252 | repeat: | |
253 | pending = 0; | |
254 | for (i = 0; i < nfds; i++) { | |
255 | DWORD avail = 0; | |
256 | HANDLE h = (HANDLE) _get_osfhandle(ufds[i].fd); | |
257 | if (h == INVALID_HANDLE_VALUE) | |
258 | return -1; /* errno was set */ | |
259 | ||
260 | if (!(ufds[i].events & POLLIN)) | |
261 | return errno = EINVAL, error("POLLIN not set"); | |
262 | ||
263 | /* this emulation works only for pipes */ | |
264 | if (!PeekNamedPipe(h, NULL, 0, NULL, &avail, NULL)) { | |
265 | int err = GetLastError(); | |
266 | if (err == ERROR_BROKEN_PIPE) { | |
267 | ufds[i].revents = POLLHUP; | |
268 | pending++; | |
269 | } else { | |
270 | errno = EINVAL; | |
271 | return error("PeekNamedPipe failed," | |
272 | " GetLastError: %u", err); | |
273 | } | |
274 | } else if (avail) { | |
275 | ufds[i].revents = POLLIN; | |
276 | pending++; | |
277 | } else | |
278 | ufds[i].revents = 0; | |
279 | } | |
280 | if (!pending) { | |
281 | /* The only times that we spin here is when the process | |
282 | * that is connected through the pipes is waiting for | |
283 | * its own input data to become available. But since | |
284 | * the process (pack-objects) is itself CPU intensive, | |
285 | * it will happily pick up the time slice that we are | |
286 | * relinguishing here. | |
287 | */ | |
288 | Sleep(0); | |
289 | goto repeat; | |
290 | } | |
291 | return 0; | |
292 | } | |
293 | ||
294 | struct tm *gmtime_r(const time_t *timep, struct tm *result) | |
295 | { | |
296 | /* gmtime() in MSVCRT.DLL is thread-safe, but not reentrant */ | |
297 | memcpy(result, gmtime(timep), sizeof(struct tm)); | |
298 | return result; | |
299 | } | |
300 | ||
301 | struct tm *localtime_r(const time_t *timep, struct tm *result) | |
302 | { | |
303 | /* localtime() in MSVCRT.DLL is thread-safe, but not reentrant */ | |
304 | memcpy(result, localtime(timep), sizeof(struct tm)); | |
305 | return result; | |
306 | } | |
307 | ||
308 | #undef getcwd | |
309 | char *mingw_getcwd(char *pointer, int len) | |
310 | { | |
311 | int i; | |
312 | char *ret = getcwd(pointer, len); | |
313 | if (!ret) | |
314 | return ret; | |
315 | for (i = 0; pointer[i]; i++) | |
316 | if (pointer[i] == '\\') | |
317 | pointer[i] = '/'; | |
318 | return ret; | |
319 | } | |
320 | ||
321 | #undef getenv | |
322 | char *mingw_getenv(const char *name) | |
323 | { | |
324 | char *result = getenv(name); | |
325 | if (!result && !strcmp(name, "TMPDIR")) { | |
326 | /* on Windows it is TMP and TEMP */ | |
327 | result = getenv("TMP"); | |
328 | if (!result) | |
329 | result = getenv("TEMP"); | |
330 | } | |
331 | return result; | |
332 | } | |
333 | ||
334 | /* | |
335 | * See http://msdn2.microsoft.com/en-us/library/17w5ykft(vs.71).aspx | |
336 | * (Parsing C++ Command-Line Arguments) | |
337 | */ | |
338 | static const char *quote_arg(const char *arg) | |
339 | { | |
340 | /* count chars to quote */ | |
341 | int len = 0, n = 0; | |
342 | int force_quotes = 0; | |
343 | char *q, *d; | |
344 | const char *p = arg; | |
345 | if (!*p) force_quotes = 1; | |
346 | while (*p) { | |
347 | if (isspace(*p) || *p == '*' || *p == '?' || *p == '{') | |
348 | force_quotes = 1; | |
349 | else if (*p == '"') | |
350 | n++; | |
351 | else if (*p == '\\') { | |
352 | int count = 0; | |
353 | while (*p == '\\') { | |
354 | count++; | |
355 | p++; | |
356 | len++; | |
357 | } | |
358 | if (*p == '"') | |
359 | n += count*2 + 1; | |
360 | continue; | |
361 | } | |
362 | len++; | |
363 | p++; | |
364 | } | |
365 | if (!force_quotes && n == 0) | |
366 | return arg; | |
367 | ||
368 | /* insert \ where necessary */ | |
369 | d = q = xmalloc(len+n+3); | |
370 | *d++ = '"'; | |
371 | while (*arg) { | |
372 | if (*arg == '"') | |
373 | *d++ = '\\'; | |
374 | else if (*arg == '\\') { | |
375 | int count = 0; | |
376 | while (*arg == '\\') { | |
377 | count++; | |
378 | *d++ = *arg++; | |
379 | } | |
380 | if (*arg == '"') { | |
381 | while (count-- > 0) | |
382 | *d++ = '\\'; | |
383 | *d++ = '\\'; | |
384 | } | |
385 | } | |
386 | *d++ = *arg++; | |
387 | } | |
388 | *d++ = '"'; | |
389 | *d++ = 0; | |
390 | return q; | |
391 | } | |
392 | ||
393 | static const char *parse_interpreter(const char *cmd) | |
394 | { | |
395 | static char buf[100]; | |
396 | char *p, *opt; | |
397 | int n, fd; | |
398 | ||
399 | /* don't even try a .exe */ | |
400 | n = strlen(cmd); | |
401 | if (n >= 4 && !strcasecmp(cmd+n-4, ".exe")) | |
402 | return NULL; | |
403 | ||
404 | fd = open(cmd, O_RDONLY); | |
405 | if (fd < 0) | |
406 | return NULL; | |
407 | n = read(fd, buf, sizeof(buf)-1); | |
408 | close(fd); | |
409 | if (n < 4) /* at least '#!/x' and not error */ | |
410 | return NULL; | |
411 | ||
412 | if (buf[0] != '#' || buf[1] != '!') | |
413 | return NULL; | |
414 | buf[n] = '\0'; | |
415 | p = strchr(buf, '\n'); | |
416 | if (!p) | |
417 | return NULL; | |
418 | ||
419 | *p = '\0'; | |
420 | if (!(p = strrchr(buf+2, '/')) && !(p = strrchr(buf+2, '\\'))) | |
421 | return NULL; | |
422 | /* strip options */ | |
423 | if ((opt = strchr(p+1, ' '))) | |
424 | *opt = '\0'; | |
425 | return p+1; | |
426 | } | |
427 | ||
428 | /* | |
429 | * Splits the PATH into parts. | |
430 | */ | |
431 | static char **get_path_split(void) | |
432 | { | |
433 | char *p, **path, *envpath = getenv("PATH"); | |
434 | int i, n = 0; | |
435 | ||
436 | if (!envpath || !*envpath) | |
437 | return NULL; | |
438 | ||
439 | envpath = xstrdup(envpath); | |
440 | p = envpath; | |
441 | while (p) { | |
442 | char *dir = p; | |
443 | p = strchr(p, ';'); | |
444 | if (p) *p++ = '\0'; | |
445 | if (*dir) { /* not earlier, catches series of ; */ | |
446 | ++n; | |
447 | } | |
448 | } | |
449 | if (!n) | |
450 | return NULL; | |
451 | ||
452 | path = xmalloc((n+1)*sizeof(char*)); | |
453 | p = envpath; | |
454 | i = 0; | |
455 | do { | |
456 | if (*p) | |
457 | path[i++] = xstrdup(p); | |
458 | p = p+strlen(p)+1; | |
459 | } while (i < n); | |
460 | path[i] = NULL; | |
461 | ||
462 | free(envpath); | |
463 | ||
464 | return path; | |
465 | } | |
466 | ||
467 | static void free_path_split(char **path) | |
468 | { | |
469 | if (!path) | |
470 | return; | |
471 | ||
472 | char **p = path; | |
473 | while (*p) | |
474 | free(*p++); | |
475 | free(path); | |
476 | } | |
477 | ||
478 | /* | |
479 | * exe_only means that we only want to detect .exe files, but not scripts | |
480 | * (which do not have an extension) | |
481 | */ | |
482 | static char *lookup_prog(const char *dir, const char *cmd, int isexe, int exe_only) | |
483 | { | |
484 | char path[MAX_PATH]; | |
485 | snprintf(path, sizeof(path), "%s/%s.exe", dir, cmd); | |
486 | ||
487 | if (!isexe && access(path, F_OK) == 0) | |
488 | return xstrdup(path); | |
489 | path[strlen(path)-4] = '\0'; | |
490 | if ((!exe_only || isexe) && access(path, F_OK) == 0) | |
491 | if (!(GetFileAttributes(path) & FILE_ATTRIBUTE_DIRECTORY)) | |
492 | return xstrdup(path); | |
493 | return NULL; | |
494 | } | |
495 | ||
496 | /* | |
497 | * Determines the absolute path of cmd using the the split path in path. | |
498 | * If cmd contains a slash or backslash, no lookup is performed. | |
499 | */ | |
500 | static char *path_lookup(const char *cmd, char **path, int exe_only) | |
501 | { | |
502 | char *prog = NULL; | |
503 | int len = strlen(cmd); | |
504 | int isexe = len >= 4 && !strcasecmp(cmd+len-4, ".exe"); | |
505 | ||
506 | if (strchr(cmd, '/') || strchr(cmd, '\\')) | |
507 | prog = xstrdup(cmd); | |
508 | ||
509 | while (!prog && *path) | |
510 | prog = lookup_prog(*path++, cmd, isexe, exe_only); | |
511 | ||
512 | return prog; | |
513 | } | |
514 | ||
515 | static int env_compare(const void *a, const void *b) | |
516 | { | |
517 | char *const *ea = a; | |
518 | char *const *eb = b; | |
519 | return strcasecmp(*ea, *eb); | |
520 | } | |
521 | ||
522 | static pid_t mingw_spawnve(const char *cmd, const char **argv, char **env, | |
523 | int prepend_cmd) | |
524 | { | |
525 | STARTUPINFO si; | |
526 | PROCESS_INFORMATION pi; | |
527 | struct strbuf envblk, args; | |
528 | unsigned flags; | |
529 | BOOL ret; | |
530 | ||
531 | /* Determine whether or not we are associated to a console */ | |
532 | HANDLE cons = CreateFile("CONOUT$", GENERIC_WRITE, | |
533 | FILE_SHARE_WRITE, NULL, OPEN_EXISTING, | |
534 | FILE_ATTRIBUTE_NORMAL, NULL); | |
535 | if (cons == INVALID_HANDLE_VALUE) { | |
536 | /* There is no console associated with this process. | |
537 | * Since the child is a console process, Windows | |
538 | * would normally create a console window. But | |
539 | * since we'll be redirecting std streams, we do | |
540 | * not need the console. | |
541 | * It is necessary to use DETACHED_PROCESS | |
542 | * instead of CREATE_NO_WINDOW to make ssh | |
543 | * recognize that it has no console. | |
544 | */ | |
545 | flags = DETACHED_PROCESS; | |
546 | } else { | |
547 | /* There is already a console. If we specified | |
548 | * DETACHED_PROCESS here, too, Windows would | |
549 | * disassociate the child from the console. | |
550 | * The same is true for CREATE_NO_WINDOW. | |
551 | * Go figure! | |
552 | */ | |
553 | flags = 0; | |
554 | CloseHandle(cons); | |
555 | } | |
556 | memset(&si, 0, sizeof(si)); | |
557 | si.cb = sizeof(si); | |
558 | si.dwFlags = STARTF_USESTDHANDLES; | |
559 | si.hStdInput = (HANDLE) _get_osfhandle(0); | |
560 | si.hStdOutput = (HANDLE) _get_osfhandle(1); | |
561 | si.hStdError = (HANDLE) _get_osfhandle(2); | |
562 | ||
563 | /* concatenate argv, quoting args as we go */ | |
564 | strbuf_init(&args, 0); | |
565 | if (prepend_cmd) { | |
566 | char *quoted = (char *)quote_arg(cmd); | |
567 | strbuf_addstr(&args, quoted); | |
568 | if (quoted != cmd) | |
569 | free(quoted); | |
570 | } | |
571 | for (; *argv; argv++) { | |
572 | char *quoted = (char *)quote_arg(*argv); | |
573 | if (*args.buf) | |
574 | strbuf_addch(&args, ' '); | |
575 | strbuf_addstr(&args, quoted); | |
576 | if (quoted != *argv) | |
577 | free(quoted); | |
578 | } | |
579 | ||
580 | if (env) { | |
581 | int count = 0; | |
582 | char **e, **sorted_env; | |
583 | ||
584 | for (e = env; *e; e++) | |
585 | count++; | |
586 | ||
587 | /* environment must be sorted */ | |
588 | sorted_env = xmalloc(sizeof(*sorted_env) * (count + 1)); | |
589 | memcpy(sorted_env, env, sizeof(*sorted_env) * (count + 1)); | |
590 | qsort(sorted_env, count, sizeof(*sorted_env), env_compare); | |
591 | ||
592 | strbuf_init(&envblk, 0); | |
593 | for (e = sorted_env; *e; e++) { | |
594 | strbuf_addstr(&envblk, *e); | |
595 | strbuf_addch(&envblk, '\0'); | |
596 | } | |
597 | free(sorted_env); | |
598 | } | |
599 | ||
600 | memset(&pi, 0, sizeof(pi)); | |
601 | ret = CreateProcess(cmd, args.buf, NULL, NULL, TRUE, flags, | |
602 | env ? envblk.buf : NULL, NULL, &si, &pi); | |
603 | ||
604 | if (env) | |
605 | strbuf_release(&envblk); | |
606 | strbuf_release(&args); | |
607 | ||
608 | if (!ret) { | |
609 | errno = ENOENT; | |
610 | return -1; | |
611 | } | |
612 | CloseHandle(pi.hThread); | |
613 | return (pid_t)pi.hProcess; | |
614 | } | |
615 | ||
616 | pid_t mingw_spawnvpe(const char *cmd, const char **argv, char **env) | |
617 | { | |
618 | pid_t pid; | |
619 | char **path = get_path_split(); | |
620 | char *prog = path_lookup(cmd, path, 0); | |
621 | ||
622 | if (!prog) { | |
623 | errno = ENOENT; | |
624 | pid = -1; | |
625 | } | |
626 | else { | |
627 | const char *interpr = parse_interpreter(prog); | |
628 | ||
629 | if (interpr) { | |
630 | const char *argv0 = argv[0]; | |
631 | char *iprog = path_lookup(interpr, path, 1); | |
632 | argv[0] = prog; | |
633 | if (!iprog) { | |
634 | errno = ENOENT; | |
635 | pid = -1; | |
636 | } | |
637 | else { | |
638 | pid = mingw_spawnve(iprog, argv, env, 1); | |
639 | free(iprog); | |
640 | } | |
641 | argv[0] = argv0; | |
642 | } | |
643 | else | |
644 | pid = mingw_spawnve(prog, argv, env, 0); | |
645 | free(prog); | |
646 | } | |
647 | free_path_split(path); | |
648 | return pid; | |
649 | } | |
650 | ||
651 | static int try_shell_exec(const char *cmd, char *const *argv, char **env) | |
652 | { | |
653 | const char *interpr = parse_interpreter(cmd); | |
654 | char **path; | |
655 | char *prog; | |
656 | int pid = 0; | |
657 | ||
658 | if (!interpr) | |
659 | return 0; | |
660 | path = get_path_split(); | |
661 | prog = path_lookup(interpr, path, 1); | |
662 | if (prog) { | |
663 | int argc = 0; | |
664 | const char **argv2; | |
665 | while (argv[argc]) argc++; | |
666 | argv2 = xmalloc(sizeof(*argv) * (argc+1)); | |
667 | argv2[0] = (char *)cmd; /* full path to the script file */ | |
668 | memcpy(&argv2[1], &argv[1], sizeof(*argv) * argc); | |
669 | pid = mingw_spawnve(prog, argv2, env, 1); | |
670 | if (pid >= 0) { | |
671 | int status; | |
672 | if (waitpid(pid, &status, 0) < 0) | |
673 | status = 255; | |
674 | exit(status); | |
675 | } | |
676 | pid = 1; /* indicate that we tried but failed */ | |
677 | free(prog); | |
678 | free(argv2); | |
679 | } | |
680 | free_path_split(path); | |
681 | return pid; | |
682 | } | |
683 | ||
684 | static void mingw_execve(const char *cmd, char *const *argv, char *const *env) | |
685 | { | |
686 | /* check if git_command is a shell script */ | |
687 | if (!try_shell_exec(cmd, argv, (char **)env)) { | |
688 | int pid, status; | |
689 | ||
690 | pid = mingw_spawnve(cmd, (const char **)argv, (char **)env, 0); | |
691 | if (pid < 0) | |
692 | return; | |
693 | if (waitpid(pid, &status, 0) < 0) | |
694 | status = 255; | |
695 | exit(status); | |
696 | } | |
697 | } | |
698 | ||
699 | void mingw_execvp(const char *cmd, char *const *argv) | |
700 | { | |
701 | char **path = get_path_split(); | |
702 | char *prog = path_lookup(cmd, path, 0); | |
703 | ||
704 | if (prog) { | |
705 | mingw_execve(prog, argv, environ); | |
706 | free(prog); | |
707 | } else | |
708 | errno = ENOENT; | |
709 | ||
710 | free_path_split(path); | |
711 | } | |
712 | ||
713 | char **copy_environ() | |
714 | { | |
715 | char **env; | |
716 | int i = 0; | |
717 | while (environ[i]) | |
718 | i++; | |
719 | env = xmalloc((i+1)*sizeof(*env)); | |
720 | for (i = 0; environ[i]; i++) | |
721 | env[i] = xstrdup(environ[i]); | |
722 | env[i] = NULL; | |
723 | return env; | |
724 | } | |
725 | ||
726 | void free_environ(char **env) | |
727 | { | |
728 | int i; | |
729 | for (i = 0; env[i]; i++) | |
730 | free(env[i]); | |
731 | free(env); | |
732 | } | |
733 | ||
734 | static int lookup_env(char **env, const char *name, size_t nmln) | |
735 | { | |
736 | int i; | |
737 | ||
738 | for (i = 0; env[i]; i++) { | |
739 | if (0 == strncmp(env[i], name, nmln) | |
740 | && '=' == env[i][nmln]) | |
741 | /* matches */ | |
742 | return i; | |
743 | } | |
744 | return -1; | |
745 | } | |
746 | ||
747 | /* | |
748 | * If name contains '=', then sets the variable, otherwise it unsets it | |
749 | */ | |
750 | char **env_setenv(char **env, const char *name) | |
751 | { | |
752 | char *eq = strchrnul(name, '='); | |
753 | int i = lookup_env(env, name, eq-name); | |
754 | ||
755 | if (i < 0) { | |
756 | if (*eq) { | |
757 | for (i = 0; env[i]; i++) | |
758 | ; | |
759 | env = xrealloc(env, (i+2)*sizeof(*env)); | |
760 | env[i] = xstrdup(name); | |
761 | env[i+1] = NULL; | |
762 | } | |
763 | } | |
764 | else { | |
765 | free(env[i]); | |
766 | if (*eq) | |
767 | env[i] = xstrdup(name); | |
768 | else | |
769 | for (; env[i]; i++) | |
770 | env[i] = env[i+1]; | |
771 | } | |
772 | return env; | |
773 | } | |
774 | ||
775 | /* this is the first function to call into WS_32; initialize it */ | |
776 | #undef gethostbyname | |
777 | struct hostent *mingw_gethostbyname(const char *host) | |
778 | { | |
779 | WSADATA wsa; | |
780 | ||
781 | if (WSAStartup(MAKEWORD(2,2), &wsa)) | |
782 | die("unable to initialize winsock subsystem, error %d", | |
783 | WSAGetLastError()); | |
784 | atexit((void(*)(void)) WSACleanup); | |
785 | return gethostbyname(host); | |
786 | } | |
787 | ||
788 | int mingw_socket(int domain, int type, int protocol) | |
789 | { | |
790 | int sockfd; | |
791 | SOCKET s = WSASocket(domain, type, protocol, NULL, 0, 0); | |
792 | if (s == INVALID_SOCKET) { | |
793 | /* | |
794 | * WSAGetLastError() values are regular BSD error codes | |
795 | * biased by WSABASEERR. | |
796 | * However, strerror() does not know about networking | |
797 | * specific errors, which are values beginning at 38 or so. | |
798 | * Therefore, we choose to leave the biased error code | |
799 | * in errno so that _if_ someone looks up the code somewhere, | |
800 | * then it is at least the number that are usually listed. | |
801 | */ | |
802 | errno = WSAGetLastError(); | |
803 | return -1; | |
804 | } | |
805 | /* convert into a file descriptor */ | |
806 | if ((sockfd = _open_osfhandle(s, O_RDWR|O_BINARY)) < 0) { | |
807 | closesocket(s); | |
808 | return error("unable to make a socket file descriptor: %s", | |
809 | strerror(errno)); | |
810 | } | |
811 | return sockfd; | |
812 | } | |
813 | ||
814 | #undef connect | |
815 | int mingw_connect(int sockfd, struct sockaddr *sa, size_t sz) | |
816 | { | |
817 | SOCKET s = (SOCKET)_get_osfhandle(sockfd); | |
818 | return connect(s, sa, sz); | |
819 | } | |
820 | ||
821 | #undef rename | |
822 | int mingw_rename(const char *pold, const char *pnew) | |
823 | { | |
824 | DWORD attrs; | |
825 | ||
826 | /* | |
827 | * Try native rename() first to get errno right. | |
828 | * It is based on MoveFile(), which cannot overwrite existing files. | |
829 | */ | |
830 | if (!rename(pold, pnew)) | |
831 | return 0; | |
832 | if (errno != EEXIST) | |
833 | return -1; | |
834 | if (MoveFileEx(pold, pnew, MOVEFILE_REPLACE_EXISTING)) | |
835 | return 0; | |
836 | /* TODO: translate more errors */ | |
837 | if (GetLastError() == ERROR_ACCESS_DENIED && | |
838 | (attrs = GetFileAttributes(pnew)) != INVALID_FILE_ATTRIBUTES) { | |
839 | if (attrs & FILE_ATTRIBUTE_DIRECTORY) { | |
840 | errno = EISDIR; | |
841 | return -1; | |
842 | } | |
843 | if ((attrs & FILE_ATTRIBUTE_READONLY) && | |
844 | SetFileAttributes(pnew, attrs & ~FILE_ATTRIBUTE_READONLY)) { | |
845 | if (MoveFileEx(pold, pnew, MOVEFILE_REPLACE_EXISTING)) | |
846 | return 0; | |
847 | /* revert file attributes on failure */ | |
848 | SetFileAttributes(pnew, attrs); | |
849 | } | |
850 | } | |
851 | errno = EACCES; | |
852 | return -1; | |
853 | } | |
854 | ||
855 | struct passwd *getpwuid(int uid) | |
856 | { | |
857 | static char user_name[100]; | |
858 | static struct passwd p; | |
859 | ||
860 | DWORD len = sizeof(user_name); | |
861 | if (!GetUserName(user_name, &len)) | |
862 | return NULL; | |
863 | p.pw_name = user_name; | |
864 | p.pw_gecos = "unknown"; | |
865 | p.pw_dir = NULL; | |
866 | return &p; | |
867 | } | |
868 | ||
869 | static HANDLE timer_event; | |
870 | static HANDLE timer_thread; | |
871 | static int timer_interval; | |
872 | static int one_shot; | |
873 | static sig_handler_t timer_fn = SIG_DFL; | |
874 | ||
875 | /* The timer works like this: | |
876 | * The thread, ticktack(), is a trivial routine that most of the time | |
877 | * only waits to receive the signal to terminate. The main thread tells | |
878 | * the thread to terminate by setting the timer_event to the signalled | |
879 | * state. | |
880 | * But ticktack() interrupts the wait state after the timer's interval | |
881 | * length to call the signal handler. | |
882 | */ | |
883 | ||
884 | static __stdcall unsigned ticktack(void *dummy) | |
885 | { | |
886 | while (WaitForSingleObject(timer_event, timer_interval) == WAIT_TIMEOUT) { | |
887 | if (timer_fn == SIG_DFL) | |
888 | die("Alarm"); | |
889 | if (timer_fn != SIG_IGN) | |
890 | timer_fn(SIGALRM); | |
891 | if (one_shot) | |
892 | break; | |
893 | } | |
894 | return 0; | |
895 | } | |
896 | ||
897 | static int start_timer_thread(void) | |
898 | { | |
899 | timer_event = CreateEvent(NULL, FALSE, FALSE, NULL); | |
900 | if (timer_event) { | |
901 | timer_thread = (HANDLE) _beginthreadex(NULL, 0, ticktack, NULL, 0, NULL); | |
902 | if (!timer_thread ) | |
903 | return errno = ENOMEM, | |
904 | error("cannot start timer thread"); | |
905 | } else | |
906 | return errno = ENOMEM, | |
907 | error("cannot allocate resources for timer"); | |
908 | return 0; | |
909 | } | |
910 | ||
911 | static void stop_timer_thread(void) | |
912 | { | |
913 | if (timer_event) | |
914 | SetEvent(timer_event); /* tell thread to terminate */ | |
915 | if (timer_thread) { | |
916 | int rc = WaitForSingleObject(timer_thread, 1000); | |
917 | if (rc == WAIT_TIMEOUT) | |
918 | error("timer thread did not terminate timely"); | |
919 | else if (rc != WAIT_OBJECT_0) | |
920 | error("waiting for timer thread failed: %lu", | |
921 | GetLastError()); | |
922 | CloseHandle(timer_thread); | |
923 | } | |
924 | if (timer_event) | |
925 | CloseHandle(timer_event); | |
926 | timer_event = NULL; | |
927 | timer_thread = NULL; | |
928 | } | |
929 | ||
930 | static inline int is_timeval_eq(const struct timeval *i1, const struct timeval *i2) | |
931 | { | |
932 | return i1->tv_sec == i2->tv_sec && i1->tv_usec == i2->tv_usec; | |
933 | } | |
934 | ||
935 | int setitimer(int type, struct itimerval *in, struct itimerval *out) | |
936 | { | |
937 | static const struct timeval zero; | |
938 | static int atexit_done; | |
939 | ||
940 | if (out != NULL) | |
941 | return errno = EINVAL, | |
942 | error("setitimer param 3 != NULL not implemented"); | |
943 | if (!is_timeval_eq(&in->it_interval, &zero) && | |
944 | !is_timeval_eq(&in->it_interval, &in->it_value)) | |
945 | return errno = EINVAL, | |
946 | error("setitimer: it_interval must be zero or eq it_value"); | |
947 | ||
948 | if (timer_thread) | |
949 | stop_timer_thread(); | |
950 | ||
951 | if (is_timeval_eq(&in->it_value, &zero) && | |
952 | is_timeval_eq(&in->it_interval, &zero)) | |
953 | return 0; | |
954 | ||
955 | timer_interval = in->it_value.tv_sec * 1000 + in->it_value.tv_usec / 1000; | |
956 | one_shot = is_timeval_eq(&in->it_interval, &zero); | |
957 | if (!atexit_done) { | |
958 | atexit(stop_timer_thread); | |
959 | atexit_done = 1; | |
960 | } | |
961 | return start_timer_thread(); | |
962 | } | |
963 | ||
964 | int sigaction(int sig, struct sigaction *in, struct sigaction *out) | |
965 | { | |
966 | if (sig != SIGALRM) | |
967 | return errno = EINVAL, | |
968 | error("sigaction only implemented for SIGALRM"); | |
969 | if (out != NULL) | |
970 | return errno = EINVAL, | |
971 | error("sigaction: param 3 != NULL not implemented"); | |
972 | ||
973 | timer_fn = in->sa_handler; | |
974 | return 0; | |
975 | } | |
976 | ||
977 | #undef signal | |
978 | sig_handler_t mingw_signal(int sig, sig_handler_t handler) | |
979 | { | |
980 | if (sig != SIGALRM) | |
981 | return signal(sig, handler); | |
982 | sig_handler_t old = timer_fn; | |
983 | timer_fn = handler; | |
984 | return old; | |
985 | } | |
986 | ||
987 | static const char *make_backslash_path(const char *path) | |
988 | { | |
989 | static char buf[PATH_MAX + 1]; | |
990 | char *c; | |
991 | ||
992 | if (strlcpy(buf, path, PATH_MAX) >= PATH_MAX) | |
993 | die("Too long path: %.*s", 60, path); | |
994 | ||
995 | for (c = buf; *c; c++) { | |
996 | if (*c == '/') | |
997 | *c = '\\'; | |
998 | } | |
999 | return buf; | |
1000 | } | |
1001 | ||
1002 | void mingw_open_html(const char *unixpath) | |
1003 | { | |
1004 | const char *htmlpath = make_backslash_path(unixpath); | |
1005 | printf("Launching default browser to display HTML ...\n"); | |
1006 | ShellExecute(NULL, "open", htmlpath, NULL, "\\", 0); | |
1007 | } |