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grep: Add the option '--open-files-in-pager'
[git/mingw/4msysgit.git] / compat / mingw.c
blob445b37b0d469acc2ba036b470b6a246647302dea
1 #include "../git-compat-util.h"
2 #include "win32.h"
3 #include <conio.h>
4 #include "../strbuf.h"
5 #include "../cache.h"
6 #include "../run-command.h"
7
8 unsigned int _CRT_fmode = _O_BINARY;
9 static const int delay[] = { 0, 1, 10, 20, 40 };
10
11 int err_win_to_posix(DWORD winerr)
12 {
13 int error = ENOSYS;
14 switch(winerr) {
15 case ERROR_ACCESS_DENIED: error = EACCES; break;
16 case ERROR_ACCOUNT_DISABLED: error = EACCES; break;
17 case ERROR_ACCOUNT_RESTRICTION: error = EACCES; break;
18 case ERROR_ALREADY_ASSIGNED: error = EBUSY; break;
19 case ERROR_ALREADY_EXISTS: error = EEXIST; break;
20 case ERROR_ARITHMETIC_OVERFLOW: error = ERANGE; break;
21 case ERROR_BAD_COMMAND: error = EIO; break;
22 case ERROR_BAD_DEVICE: error = ENODEV; break;
23 case ERROR_BAD_DRIVER_LEVEL: error = ENXIO; break;
24 case ERROR_BAD_EXE_FORMAT: error = ENOEXEC; break;
25 case ERROR_BAD_FORMAT: error = ENOEXEC; break;
26 case ERROR_BAD_LENGTH: error = EINVAL; break;
27 case ERROR_BAD_PATHNAME: error = ENOENT; break;
28 case ERROR_BAD_PIPE: error = EPIPE; break;
29 case ERROR_BAD_UNIT: error = ENODEV; break;
30 case ERROR_BAD_USERNAME: error = EINVAL; break;
31 case ERROR_BROKEN_PIPE: error = EPIPE; break;
32 case ERROR_BUFFER_OVERFLOW: error = ENAMETOOLONG; break;
33 case ERROR_BUSY: error = EBUSY; break;
34 case ERROR_BUSY_DRIVE: error = EBUSY; break;
35 case ERROR_CALL_NOT_IMPLEMENTED: error = ENOSYS; break;
36 case ERROR_CANNOT_MAKE: error = EACCES; break;
37 case ERROR_CANTOPEN: error = EIO; break;
38 case ERROR_CANTREAD: error = EIO; break;
39 case ERROR_CANTWRITE: error = EIO; break;
40 case ERROR_CRC: error = EIO; break;
41 case ERROR_CURRENT_DIRECTORY: error = EACCES; break;
42 case ERROR_DEVICE_IN_USE: error = EBUSY; break;
43 case ERROR_DEV_NOT_EXIST: error = ENODEV; break;
44 case ERROR_DIRECTORY: error = EINVAL; break;
45 case ERROR_DIR_NOT_EMPTY: error = ENOTEMPTY; break;
46 case ERROR_DISK_CHANGE: error = EIO; break;
47 case ERROR_DISK_FULL: error = ENOSPC; break;
48 case ERROR_DRIVE_LOCKED: error = EBUSY; break;
49 case ERROR_ENVVAR_NOT_FOUND: error = EINVAL; break;
50 case ERROR_EXE_MARKED_INVALID: error = ENOEXEC; break;
51 case ERROR_FILENAME_EXCED_RANGE: error = ENAMETOOLONG; break;
52 case ERROR_FILE_EXISTS: error = EEXIST; break;
53 case ERROR_FILE_INVALID: error = ENODEV; break;
54 case ERROR_FILE_NOT_FOUND: error = ENOENT; break;
55 case ERROR_GEN_FAILURE: error = EIO; break;
56 case ERROR_HANDLE_DISK_FULL: error = ENOSPC; break;
57 case ERROR_INSUFFICIENT_BUFFER: error = ENOMEM; break;
58 case ERROR_INVALID_ACCESS: error = EACCES; break;
59 case ERROR_INVALID_ADDRESS: error = EFAULT; break;
60 case ERROR_INVALID_BLOCK: error = EFAULT; break;
61 case ERROR_INVALID_DATA: error = EINVAL; break;
62 case ERROR_INVALID_DRIVE: error = ENODEV; break;
63 case ERROR_INVALID_EXE_SIGNATURE: error = ENOEXEC; break;
64 case ERROR_INVALID_FLAGS: error = EINVAL; break;
65 case ERROR_INVALID_FUNCTION: error = ENOSYS; break;
66 case ERROR_INVALID_HANDLE: error = EBADF; break;
67 case ERROR_INVALID_LOGON_HOURS: error = EACCES; break;
68 case ERROR_INVALID_NAME: error = EINVAL; break;
69 case ERROR_INVALID_OWNER: error = EINVAL; break;
70 case ERROR_INVALID_PARAMETER: error = EINVAL; break;
71 case ERROR_INVALID_PASSWORD: error = EPERM; break;
72 case ERROR_INVALID_PRIMARY_GROUP: error = EINVAL; break;
73 case ERROR_INVALID_SIGNAL_NUMBER: error = EINVAL; break;
74 case ERROR_INVALID_TARGET_HANDLE: error = EIO; break;
75 case ERROR_INVALID_WORKSTATION: error = EACCES; break;
76 case ERROR_IO_DEVICE: error = EIO; break;
77 case ERROR_IO_INCOMPLETE: error = EINTR; break;
78 case ERROR_LOCKED: error = EBUSY; break;
79 case ERROR_LOCK_VIOLATION: error = EACCES; break;
80 case ERROR_LOGON_FAILURE: error = EACCES; break;
81 case ERROR_MAPPED_ALIGNMENT: error = EINVAL; break;
82 case ERROR_META_EXPANSION_TOO_LONG: error = E2BIG; break;
83 case ERROR_MORE_DATA: error = EPIPE; break;
84 case ERROR_NEGATIVE_SEEK: error = ESPIPE; break;
85 case ERROR_NOACCESS: error = EFAULT; break;
86 case ERROR_NONE_MAPPED: error = EINVAL; break;
87 case ERROR_NOT_ENOUGH_MEMORY: error = ENOMEM; break;
88 case ERROR_NOT_READY: error = EAGAIN; break;
89 case ERROR_NOT_SAME_DEVICE: error = EXDEV; break;
90 case ERROR_NO_DATA: error = EPIPE; break;
91 case ERROR_NO_MORE_SEARCH_HANDLES: error = EIO; break;
92 case ERROR_NO_PROC_SLOTS: error = EAGAIN; break;
93 case ERROR_NO_SUCH_PRIVILEGE: error = EACCES; break;
94 case ERROR_OPEN_FAILED: error = EIO; break;
95 case ERROR_OPEN_FILES: error = EBUSY; break;
96 case ERROR_OPERATION_ABORTED: error = EINTR; break;
97 case ERROR_OUTOFMEMORY: error = ENOMEM; break;
98 case ERROR_PASSWORD_EXPIRED: error = EACCES; break;
99 case ERROR_PATH_BUSY: error = EBUSY; break;
100 case ERROR_PATH_NOT_FOUND: error = ENOENT; break;
101 case ERROR_PIPE_BUSY: error = EBUSY; break;
102 case ERROR_PIPE_CONNECTED: error = EPIPE; break;
103 case ERROR_PIPE_LISTENING: error = EPIPE; break;
104 case ERROR_PIPE_NOT_CONNECTED: error = EPIPE; break;
105 case ERROR_PRIVILEGE_NOT_HELD: error = EACCES; break;
106 case ERROR_READ_FAULT: error = EIO; break;
107 case ERROR_SEEK: error = EIO; break;
108 case ERROR_SEEK_ON_DEVICE: error = ESPIPE; break;
109 case ERROR_SHARING_BUFFER_EXCEEDED: error = ENFILE; break;
110 case ERROR_SHARING_VIOLATION: error = EACCES; break;
111 case ERROR_STACK_OVERFLOW: error = ENOMEM; break;
112 case ERROR_SWAPERROR: error = ENOENT; break;
113 case ERROR_TOO_MANY_MODULES: error = EMFILE; break;
114 case ERROR_TOO_MANY_OPEN_FILES: error = EMFILE; break;
115 case ERROR_UNRECOGNIZED_MEDIA: error = ENXIO; break;
116 case ERROR_UNRECOGNIZED_VOLUME: error = ENODEV; break;
117 case ERROR_WAIT_NO_CHILDREN: error = ECHILD; break;
118 case ERROR_WRITE_FAULT: error = EIO; break;
119 case ERROR_WRITE_PROTECT: error = EROFS; break;
120 }
121 return error;
122 }
123
124 static int make_hidden(const char *path)
125 {
126 DWORD attribs = GetFileAttributes(path);
127 if (SetFileAttributes(path, FILE_ATTRIBUTE_HIDDEN | attribs))
128 return 0;
129 errno = err_win_to_posix(GetLastError());
130 return -1;
131 }
132
133 void mingw_mark_as_git_dir(const char *dir)
134 {
135 if (hide_dotfiles != HIDE_DOTFILES_FALSE && !is_bare_repository() &&
136 make_hidden(dir))
137 warning("Failed to make '%s' hidden", dir);
138 git_config_set("core.hideDotFiles",
139 hide_dotfiles == HIDE_DOTFILES_FALSE ? "false" :
140 (hide_dotfiles == HIDE_DOTFILES_DOTGITONLY ?
141 "dotGitOnly" : "true"));
142 }
143
144 #undef mkdir
145 int mingw_mkdir(const char *path, int mode)
146 {
147 int ret = mkdir(path);
148 if (!ret && hide_dotfiles == HIDE_DOTFILES_TRUE) {
149 /*
150 * In Windows a file or dir starting with a dot is not
151 * automatically hidden. So lets mark it as hidden when
152 * such a directory is created.
153 */
154 const char *start = basename((char*)path);
155 if (*start == '.')
156 return make_hidden(path);
157 }
158 return ret;
159 }
160
161 static int ask_user_yes_no(const char *format, ...)
162 {
163 char answer[5];
164 char question[4096];
165 const char *retry_hook[] = { NULL, NULL, NULL };
166 va_list args;
167
168 if ((retry_hook[0] = getenv("GIT_ASK_YESNO"))) {
169
170 va_start(args, format);
171 vsnprintf(question, sizeof(question), format, args);
172 va_end(args);
173
174 retry_hook[1] = question;
175 return !run_command_v_opt(retry_hook, 0);
176 }
177
178 if (!isatty(_fileno(stdin)))
179 return 0;
180
181 while (1) {
182 va_start(args, format);
183 vfprintf(stderr, format, args);
184 va_end(args);
185 fprintf(stderr, " (y/n)? ");
186
187 if (fgets(answer, sizeof(answer), stdin)) {
188 /* remove the newline */
189 if (answer[strlen(answer)-2] == '\r')
190 answer[strlen(answer)-2] = '\0';
191 if (answer[strlen(answer)-1] == '\n')
192 answer[strlen(answer)-1] = '\0';
193 } else
194 return 0;
195
196 if (answer[0] == 'y' && strlen(answer) == 1)
197 return 1;
198 if (!strncasecmp(answer, "yes", sizeof(answer)))
199 return 1;
200 if (answer[0] == 'n' && strlen(answer) == 1)
201 return 0;
202 if (!strncasecmp(answer, "no", sizeof(answer)))
203 return 0;
204 fprintf(stderr, "I did not understand your answer: '%s'\n",
205 answer);
206 }
207 }
208
209 #undef unlink
210 int mingw_unlink(const char *pathname)
211 {
212 int ret, tries = 0;
213
214 /* read-only files cannot be removed */
215 chmod(pathname, 0666);
216 while ((ret = unlink(pathname)) == -1 && tries < ARRAY_SIZE(delay)) {
217 if (errno != EACCES)
218 break;
219 /*
220 * We assume that some other process had the source or
221 * destination file open at the wrong moment and retry.
222 * In order to give the other process a higher chance to
223 * complete its operation, we give up our time slice now.
224 * If we have to retry again, we do sleep a bit.
225 */
226 Sleep(delay[tries]);
227 tries++;
228 }
229 while (ret == -1 && errno == EACCES &&
230 ask_user_yes_no("Unlink of file '%s' failed. "
231 "Should I try again?", pathname))
232 ret = unlink(pathname);
233 return ret;
234 }
235
236 #undef rmdir
237 int mingw_rmdir(const char *pathname)
238 {
239 int ret, tries = 0;
240
241 while ((ret = rmdir(pathname)) == -1 && tries < ARRAY_SIZE(delay)) {
242 if (errno != EACCES)
243 break;
244 /*
245 * We assume that some other process had the source or
246 * destination file open at the wrong moment and retry.
247 * In order to give the other process a higher chance to
248 * complete its operation, we give up our time slice now.
249 * If we have to retry again, we do sleep a bit.
250 */
251 Sleep(delay[tries]);
252 tries++;
253 }
254 while (ret == -1 && errno == EACCES &&
255 ask_user_yes_no("Deletion of directory '%s' failed. "
256 "Should I try again?", pathname))
257 ret = rmdir(pathname);
258 return ret;
259 }
260
261 #undef open
262 int mingw_open (const char *filename, int oflags, ...)
263 {
264 va_list args;
265 unsigned mode;
266 int fd;
267
268 va_start(args, oflags);
269 mode = va_arg(args, int);
270 va_end(args);
271
272 if (!strcmp(filename, "/dev/null"))
273 filename = "nul";
274
275 fd = open(filename, oflags, mode);
276
277 if (fd < 0 && (oflags & O_CREAT) && errno == EACCES) {
278 DWORD attrs = GetFileAttributes(filename);
279 if (attrs != INVALID_FILE_ATTRIBUTES && (attrs & FILE_ATTRIBUTE_DIRECTORY))
280 errno = EISDIR;
281 }
282 if ((oflags & O_CREAT) && fd >= 0 &&
283 hide_dotfiles == HIDE_DOTFILES_TRUE) {
284 /*
285 * In Windows a file or dir starting with a dot is not
286 * automatically hidden. So lets mark it as hidden when
287 * such a file is created.
288 */
289 const char *start = basename((char*)filename);
290 if (*start == '.' && make_hidden(filename))
291 warning("Could not mark '%s' as hidden.", filename);
292 }
293 return fd;
294 }
295
296 #undef fopen
297 FILE *mingw_fopen (const char *filename, const char *otype)
298 {
299 int hide = 0;
300 FILE *file;
301 if (hide_dotfiles == HIDE_DOTFILES_TRUE &&
302 basename((char*)filename)[0] == '.')
303 hide = access(filename, F_OK);
304 if (!strcmp(filename, "/dev/null"))
305 filename = "nul";
306 file = fopen(filename, otype);
307 if (file && hide && make_hidden(filename))
308 warning("Could not mark '%s' as hidden.", filename);
309 return file;
310 }
311
312 #undef freopen
313 FILE *mingw_freopen (const char *filename, const char *otype, FILE *stream)
314 {
315 int hide = 0;
316 FILE *file;
317 if (hide_dotfiles == HIDE_DOTFILES_TRUE &&
318 basename((char*)filename)[0] == '.')
319 hide = access(filename, F_OK);
320 if (filename && !strcmp(filename, "/dev/null"))
321 filename = "nul";
322 file = freopen(filename, otype, stream);
323 if (file && hide && make_hidden(filename))
324 warning("Could not mark '%s' as hidden.", filename);
325 return file;
326 }
327
328 /*
329 * The unit of FILETIME is 100-nanoseconds since January 1, 1601, UTC.
330 * Returns the 100-nanoseconds ("hekto nanoseconds") since the epoch.
331 */
332 static inline long long filetime_to_hnsec(const FILETIME *ft)
333 {
334 long long winTime = ((long long)ft->dwHighDateTime << 32) + ft->dwLowDateTime;
335 /* Windows to Unix Epoch conversion */
336 return winTime - 116444736000000000LL;
337 }
338
339 static inline time_t filetime_to_time_t(const FILETIME *ft)
340 {
341 return (time_t)(filetime_to_hnsec(ft) / 10000000);
342 }
343
344 /* We keep the do_lstat code in a separate function to avoid recursion.
345 * When a path ends with a slash, the stat will fail with ENOENT. In
346 * this case, we strip the trailing slashes and stat again.
347 *
348 * If follow is true then act like stat() and report on the link
349 * target. Otherwise report on the link itself.
350 */
351 static int do_lstat(int follow, const char *file_name, struct stat *buf)
352 {
353 WIN32_FILE_ATTRIBUTE_DATA fdata;
354
355 if (!(errno = get_file_attr(file_name, &fdata))) {
356 buf->st_ino = 0;
357 buf->st_gid = 0;
358 buf->st_uid = 0;
359 buf->st_nlink = 1;
360 buf->st_mode = file_attr_to_st_mode(fdata.dwFileAttributes);
361 buf->st_size = fdata.nFileSizeLow |
362 (((off_t)fdata.nFileSizeHigh)<<32);
363 buf->st_dev = buf->st_rdev = 0; /* not used by Git */
364 buf->st_atime = filetime_to_time_t(&(fdata.ftLastAccessTime));
365 buf->st_mtime = filetime_to_time_t(&(fdata.ftLastWriteTime));
366 buf->st_ctime = filetime_to_time_t(&(fdata.ftCreationTime));
367 if (fdata.dwFileAttributes & FILE_ATTRIBUTE_REPARSE_POINT) {
368 WIN32_FIND_DATAA findbuf;
369 HANDLE handle = FindFirstFileA(file_name, &findbuf);
370 if (handle != INVALID_HANDLE_VALUE) {
371 if ((findbuf.dwFileAttributes & FILE_ATTRIBUTE_REPARSE_POINT) &&
372 (findbuf.dwReserved0 == IO_REPARSE_TAG_SYMLINK)) {
373 if (follow) {
374 char buffer[MAXIMUM_REPARSE_DATA_BUFFER_SIZE];
375 buf->st_size = readlink(file_name, buffer, MAXIMUM_REPARSE_DATA_BUFFER_SIZE);
376 } else {
377 buf->st_mode = S_IFLNK;
378 }
379 buf->st_mode |= S_IREAD;
380 if (!(findbuf.dwFileAttributes & FILE_ATTRIBUTE_READONLY))
381 buf->st_mode |= S_IWRITE;
382 }
383 FindClose(handle);
384 }
385 }
386 return 0;
387 }
388 return -1;
389 }
390
391 /* We provide our own lstat/fstat functions, since the provided
392 * lstat/fstat functions are so slow. These stat functions are
393 * tailored for Git's usage (read: fast), and are not meant to be
394 * complete. Note that Git stat()s are redirected to mingw_lstat()
395 * too, since Windows doesn't really handle symlinks that well.
396 */
397 static int do_stat_internal(int follow, const char *file_name, struct stat *buf)
398 {
399 int namelen;
400 static char alt_name[PATH_MAX];
401
402 if (!do_lstat(follow, file_name, buf))
403 return 0;
404
405 /* if file_name ended in a '/', Windows returned ENOENT;
406 * try again without trailing slashes
407 */
408 if (errno != ENOENT)
409 return -1;
410
411 namelen = strlen(file_name);
412 if (namelen && file_name[namelen-1] != '/')
413 return -1;
414 while (namelen && file_name[namelen-1] == '/')
415 --namelen;
416 if (!namelen || namelen >= PATH_MAX)
417 return -1;
418
419 memcpy(alt_name, file_name, namelen);
420 alt_name[namelen] = 0;
421 return do_lstat(follow, alt_name, buf);
422 }
423
424 int mingw_lstat(const char *file_name, struct stat *buf)
425 {
426 return do_stat_internal(0, file_name, buf);
427 }
428 int mingw_stat(const char *file_name, struct stat *buf)
429 {
430 return do_stat_internal(1, file_name, buf);
431 }
432
433 #undef fstat
434 int mingw_fstat(int fd, struct stat *buf)
435 {
436 HANDLE fh = (HANDLE)_get_osfhandle(fd);
437 BY_HANDLE_FILE_INFORMATION fdata;
438
439 if (fh == INVALID_HANDLE_VALUE) {
440 errno = EBADF;
441 return -1;
442 }
443 /* direct non-file handles to MS's fstat() */
444 if (GetFileType(fh) != FILE_TYPE_DISK)
445 return _fstati64(fd, buf);
446
447 if (GetFileInformationByHandle(fh, &fdata)) {
448 buf->st_ino = 0;
449 buf->st_gid = 0;
450 buf->st_uid = 0;
451 buf->st_nlink = 1;
452 buf->st_mode = file_attr_to_st_mode(fdata.dwFileAttributes);
453 buf->st_size = fdata.nFileSizeLow |
454 (((off_t)fdata.nFileSizeHigh)<<32);
455 buf->st_dev = buf->st_rdev = 0; /* not used by Git */
456 buf->st_atime = filetime_to_time_t(&(fdata.ftLastAccessTime));
457 buf->st_mtime = filetime_to_time_t(&(fdata.ftLastWriteTime));
458 buf->st_ctime = filetime_to_time_t(&(fdata.ftCreationTime));
459 return 0;
460 }
461 errno = EBADF;
462 return -1;
463 }
464
465 static inline void time_t_to_filetime(time_t t, FILETIME *ft)
466 {
467 long long winTime = t * 10000000LL + 116444736000000000LL;
468 ft->dwLowDateTime = winTime;
469 ft->dwHighDateTime = winTime >> 32;
470 }
471
472 int mingw_utime (const char *file_name, const struct utimbuf *times)
473 {
474 FILETIME mft, aft;
475 int fh, rc;
476
477 /* must have write permission */
478 DWORD attrs = GetFileAttributes(file_name);
479 if (attrs != INVALID_FILE_ATTRIBUTES &&
480 (attrs & FILE_ATTRIBUTE_READONLY)) {
481 /* ignore errors here; open() will report them */
482 SetFileAttributes(file_name, attrs & ~FILE_ATTRIBUTE_READONLY);
483 }
484
485 if ((fh = open(file_name, O_RDWR | O_BINARY)) < 0) {
486 rc = -1;
487 goto revert_attrs;
488 }
489
490 time_t_to_filetime(times->modtime, &mft);
491 time_t_to_filetime(times->actime, &aft);
492 if (!SetFileTime((HANDLE)_get_osfhandle(fh), NULL, &aft, &mft)) {
493 errno = EINVAL;
494 rc = -1;
495 } else
496 rc = 0;
497 close(fh);
498
499 revert_attrs:
500 if (attrs != INVALID_FILE_ATTRIBUTES &&
501 (attrs & FILE_ATTRIBUTE_READONLY)) {
502 /* ignore errors again */
503 SetFileAttributes(file_name, attrs);
504 }
505 return rc;
506 }
507
508 unsigned int sleep (unsigned int seconds)
509 {
510 Sleep(seconds*1000);
511 return 0;
512 }
513
514 int mkstemp(char *template)
515 {
516 char *filename = mktemp(template);
517 if (filename == NULL)
518 return -1;
519 return open(filename, O_RDWR | O_CREAT, 0600);
520 }
521
522 int gettimeofday(struct timeval *tv, void *tz)
523 {
524 FILETIME ft;
525 long long hnsec;
526
527 GetSystemTimeAsFileTime(&ft);
528 hnsec = filetime_to_hnsec(&ft);
529 tv->tv_sec = hnsec / 10000000;
530 tv->tv_usec = (hnsec % 10000000) / 10;
531 return 0;
532 }
533
534 int pipe(int filedes[2])
535 {
536 HANDLE h[2];
537
538 /* this creates non-inheritable handles */
539 if (!CreatePipe(&h[0], &h[1], NULL, 8192)) {
540 errno = err_win_to_posix(GetLastError());
541 return -1;
542 }
543 filedes[0] = _open_osfhandle((int)h[0], O_NOINHERIT);
544 if (filedes[0] < 0) {
545 CloseHandle(h[0]);
546 CloseHandle(h[1]);
547 return -1;
548 }
549 filedes[1] = _open_osfhandle((int)h[1], O_NOINHERIT);
550 if (filedes[0] < 0) {
551 close(filedes[0]);
552 CloseHandle(h[1]);
553 return -1;
554 }
555 return 0;
556 }
557
558 int poll(struct pollfd *ufds, unsigned int nfds, int timeout)
559 {
560 int i, pending;
561
562 if (timeout >= 0) {
563 if (nfds == 0) {
564 Sleep(timeout);
565 return 0;
566 }
567 return errno = EINVAL, error("poll timeout not supported");
568 }
569
570 /* When there is only one fd to wait for, then we pretend that
571 * input is available and let the actual wait happen when the
572 * caller invokes read().
573 */
574 if (nfds == 1) {
575 if (!(ufds[0].events & POLLIN))
576 return errno = EINVAL, error("POLLIN not set");
577 ufds[0].revents = POLLIN;
578 return 0;
579 }
580
581 repeat:
582 pending = 0;
583 for (i = 0; i < nfds; i++) {
584 DWORD avail = 0;
585 HANDLE h = (HANDLE) _get_osfhandle(ufds[i].fd);
586 if (h == INVALID_HANDLE_VALUE)
587 return -1; /* errno was set */
588
589 if (!(ufds[i].events & POLLIN))
590 return errno = EINVAL, error("POLLIN not set");
591
592 /* this emulation works only for pipes */
593 if (!PeekNamedPipe(h, NULL, 0, NULL, &avail, NULL)) {
594 int err = GetLastError();
595 if (err == ERROR_BROKEN_PIPE) {
596 ufds[i].revents = POLLHUP;
597 pending++;
598 } else {
599 errno = EINVAL;
600 return error("PeekNamedPipe failed,"
601 " GetLastError: %u", err);
602 }
603 } else if (avail) {
604 ufds[i].revents = POLLIN;
605 pending++;
606 } else
607 ufds[i].revents = 0;
608 }
609 if (!pending) {
610 /* The only times that we spin here is when the process
611 * that is connected through the pipes is waiting for
612 * its own input data to become available. But since
613 * the process (pack-objects) is itself CPU intensive,
614 * it will happily pick up the time slice that we are
615 * relinquishing here.
616 */
617 Sleep(0);
618 goto repeat;
619 }
620 return 0;
621 }
622
623 struct tm *gmtime_r(const time_t *timep, struct tm *result)
624 {
625 /* gmtime() in MSVCRT.DLL is thread-safe, but not reentrant */
626 memcpy(result, gmtime(timep), sizeof(struct tm));
627 return result;
628 }
629
630 struct tm *localtime_r(const time_t *timep, struct tm *result)
631 {
632 /* localtime() in MSVCRT.DLL is thread-safe, but not reentrant */
633 memcpy(result, localtime(timep), sizeof(struct tm));
634 return result;
635 }
636
637 #undef getcwd
638 char *mingw_getcwd(char *pointer, int len)
639 {
640 int i;
641 char *ret = getcwd(pointer, len);
642 if (!ret)
643 return ret;
644 for (i = 0; pointer[i]; i++)
645 if (pointer[i] == '\\')
646 pointer[i] = '/';
647 return ret;
648 }
649
650 #undef getenv
651 char *mingw_getenv(const char *name)
652 {
653 char *result = getenv(name);
654 if (!result && !strcmp(name, "TMPDIR")) {
655 /* on Windows it is TMP and TEMP */
656 result = getenv("TMP");
657 if (!result)
658 result = getenv("TEMP");
659 }
660 return result;
661 }
662
663 /*
664 * See http://msdn2.microsoft.com/en-us/library/17w5ykft(vs.71).aspx
665 * (Parsing C++ Command-Line Arguments)
666 */
667 static const char *quote_arg(const char *arg)
668 {
669 /* count chars to quote */
670 int len = 0, n = 0;
671 int force_quotes = 0;
672 char *q, *d;
673 const char *p = arg;
674 if (!*p) force_quotes = 1;
675 while (*p) {
676 if (isspace(*p) || *p == '*' || *p == '?' || *p == '{' || *p == '\'')
677 force_quotes = 1;
678 else if (*p == '"')
679 n++;
680 else if (*p == '\\') {
681 int count = 0;
682 while (*p == '\\') {
683 count++;
684 p++;
685 len++;
686 }
687 if (*p == '"')
688 n += count*2 + 1;
689 continue;
690 }
691 len++;
692 p++;
693 }
694 if (!force_quotes && n == 0)
695 return arg;
696
697 /* insert \ where necessary */
698 d = q = xmalloc(len+n+3);
699 *d++ = '"';
700 while (*arg) {
701 if (*arg == '"')
702 *d++ = '\\';
703 else if (*arg == '\\') {
704 int count = 0;
705 while (*arg == '\\') {
706 count++;
707 *d++ = *arg++;
708 }
709 if (*arg == '"') {
710 while (count-- > 0)
711 *d++ = '\\';
712 *d++ = '\\';
713 }
714 }
715 *d++ = *arg++;
716 }
717 *d++ = '"';
718 *d++ = 0;
719 return q;
720 }
721
722 static const char *parse_interpreter(const char *cmd)
723 {
724 static char buf[100];
725 char *p, *opt;
726 int n, fd;
727
728 /* don't even try a .exe */
729 n = strlen(cmd);
730 if (n >= 4 && !strcasecmp(cmd+n-4, ".exe"))
731 return NULL;
732
733 fd = open(cmd, O_RDONLY);
734 if (fd < 0)
735 return NULL;
736 n = read(fd, buf, sizeof(buf)-1);
737 close(fd);
738 if (n < 4) /* at least '#!/x' and not error */
739 return NULL;
740
741 if (buf[0] != '#' || buf[1] != '!')
742 return NULL;
743 buf[n] = '\0';
744 p = buf + strcspn(buf, "\r\n");
745 if (!*p)
746 return NULL;
747
748 *p = '\0';
749 if (!(p = strrchr(buf+2, '/')) && !(p = strrchr(buf+2, '\\')))
750 return NULL;
751 /* strip options */
752 if ((opt = strchr(p+1, ' ')))
753 *opt = '\0';
754 return p+1;
755 }
756
757 /*
758 * Splits the PATH into parts.
759 */
760 static char **get_path_split(void)
761 {
762 char *p, **path, *envpath = getenv("PATH");
763 int i, n = 0;
764
765 if (!envpath || !*envpath)
766 return NULL;
767
768 envpath = xstrdup(envpath);
769 p = envpath;
770 while (p) {
771 char *dir = p;
772 p = strchr(p, ';');
773 if (p) *p++ = '\0';
774 if (*dir) { /* not earlier, catches series of ; */
775 ++n;
776 }
777 }
778 if (!n)
779 return NULL;
780
781 path = xmalloc((n+1)*sizeof(char *));
782 p = envpath;
783 i = 0;
784 do {
785 if (*p)
786 path[i++] = xstrdup(p);
787 p = p+strlen(p)+1;
788 } while (i < n);
789 path[i] = NULL;
790
791 free(envpath);
792
793 return path;
794 }
795
796 static void free_path_split(char **path)
797 {
798 char **p = path;
799
800 if (!path)
801 return;
802
803 while (*p)
804 free(*p++);
805 free(path);
806 }
807
808 /*
809 * exe_only means that we only want to detect .exe files, but not scripts
810 * (which do not have an extension)
811 */
812 static char *lookup_prog(const char *dir, const char *cmd, int isexe, int exe_only)
813 {
814 char path[MAX_PATH];
815 snprintf(path, sizeof(path), "%s/%s.exe", dir, cmd);
816
817 if (!isexe && access(path, F_OK) == 0)
818 return xstrdup(path);
819 path[strlen(path)-4] = '\0';
820 if ((!exe_only || isexe) && access(path, F_OK) == 0)
821 if (!(GetFileAttributes(path) & FILE_ATTRIBUTE_DIRECTORY))
822 return xstrdup(path);
823 return NULL;
824 }
825
826 /*
827 * Determines the absolute path of cmd using the the split path in path.
828 * If cmd contains a slash or backslash, no lookup is performed.
829 */
830 static char *path_lookup(const char *cmd, char **path, int exe_only)
831 {
832 char *prog = NULL;
833 int len = strlen(cmd);
834 int isexe = len >= 4 && !strcasecmp(cmd+len-4, ".exe");
835
836 if (strchr(cmd, '/') || strchr(cmd, '\\'))
837 prog = xstrdup(cmd);
838
839 while (!prog && *path)
840 prog = lookup_prog(*path++, cmd, isexe, exe_only);
841
842 return prog;
843 }
844
845 static int env_compare(const void *a, const void *b)
846 {
847 char *const *ea = a;
848 char *const *eb = b;
849 return strcasecmp(*ea, *eb);
850 }
851
852 static pid_t mingw_spawnve_fd(const char *cmd, const char **argv, char **env,
853 const char *dir,
854 int prepend_cmd, int fhin, int fhout, int fherr)
855 {
856 STARTUPINFO si;
857 PROCESS_INFORMATION pi;
858 struct strbuf envblk, args;
859 unsigned flags;
860 BOOL ret;
861
862 /* Determine whether or not we are associated to a console */
863 HANDLE cons = CreateFile("CONOUT$", GENERIC_WRITE,
864 FILE_SHARE_WRITE, NULL, OPEN_EXISTING,
865 FILE_ATTRIBUTE_NORMAL, NULL);
866 if (cons == INVALID_HANDLE_VALUE) {
867 /* There is no console associated with this process.
868 * Since the child is a console process, Windows
869 * would normally create a console window. But
870 * since we'll be redirecting std streams, we do
871 * not need the console.
872 * It is necessary to use DETACHED_PROCESS
873 * instead of CREATE_NO_WINDOW to make ssh
874 * recognize that it has no console.
875 */
876 flags = DETACHED_PROCESS;
877 } else {
878 /* There is already a console. If we specified
879 * DETACHED_PROCESS here, too, Windows would
880 * disassociate the child from the console.
881 * The same is true for CREATE_NO_WINDOW.
882 * Go figure!
883 */
884 flags = 0;
885 CloseHandle(cons);
886 }
887 memset(&si, 0, sizeof(si));
888 si.cb = sizeof(si);
889 si.dwFlags = STARTF_USESTDHANDLES;
890 si.hStdInput = (HANDLE) _get_osfhandle(fhin);
891 si.hStdOutput = (HANDLE) _get_osfhandle(fhout);
892 si.hStdError = (HANDLE) _get_osfhandle(fherr);
893
894 /* concatenate argv, quoting args as we go */
895 strbuf_init(&args, 0);
896 if (prepend_cmd) {
897 char *quoted = (char *)quote_arg(cmd);
898 strbuf_addstr(&args, quoted);
899 if (quoted != cmd)
900 free(quoted);
901 }
902 for (; *argv; argv++) {
903 char *quoted = (char *)quote_arg(*argv);
904 if (*args.buf)
905 strbuf_addch(&args, ' ');
906 strbuf_addstr(&args, quoted);
907 if (quoted != *argv)
908 free(quoted);
909 }
910
911 if (env) {
912 int count = 0;
913 char **e, **sorted_env;
914
915 for (e = env; *e; e++)
916 count++;
917
918 /* environment must be sorted */
919 sorted_env = xmalloc(sizeof(*sorted_env) * (count + 1));
920 memcpy(sorted_env, env, sizeof(*sorted_env) * (count + 1));
921 qsort(sorted_env, count, sizeof(*sorted_env), env_compare);
922
923 strbuf_init(&envblk, 0);
924 for (e = sorted_env; *e; e++) {
925 strbuf_addstr(&envblk, *e);
926 strbuf_addch(&envblk, '\0');
927 }
928 free(sorted_env);
929 }
930
931 memset(&pi, 0, sizeof(pi));
932 ret = CreateProcess(cmd, args.buf, NULL, NULL, TRUE, flags,
933 env ? envblk.buf : NULL, dir, &si, &pi);
934
935 if (env)
936 strbuf_release(&envblk);
937 strbuf_release(&args);
938
939 if (!ret) {
940 errno = ENOENT;
941 return -1;
942 }
943 CloseHandle(pi.hThread);
944 return (pid_t)pi.hProcess;
945 }
946
947 static pid_t mingw_spawnve(const char *cmd, const char **argv, char **env,
948 int prepend_cmd)
949 {
950 return mingw_spawnve_fd(cmd, argv, env, NULL, prepend_cmd, 0, 1, 2);
951 }
952
953 pid_t mingw_spawnvpe(const char *cmd, const char **argv, char **env,
954 const char *dir,
955 int fhin, int fhout, int fherr)
956 {
957 pid_t pid;
958 char **path = get_path_split();
959 char *prog = path_lookup(cmd, path, 0);
960
961 if (!prog) {
962 errno = ENOENT;
963 pid = -1;
964 }
965 else {
966 const char *interpr = parse_interpreter(prog);
967
968 if (interpr) {
969 const char *argv0 = argv[0];
970 char *iprog = path_lookup(interpr, path, 1);
971 argv[0] = prog;
972 if (!iprog) {
973 errno = ENOENT;
974 pid = -1;
975 }
976 else {
977 pid = mingw_spawnve_fd(iprog, argv, env, dir, 1,
978 fhin, fhout, fherr);
979 free(iprog);
980 }
981 argv[0] = argv0;
982 }
983 else
984 pid = mingw_spawnve_fd(prog, argv, env, dir, 0,
985 fhin, fhout, fherr);
986 free(prog);
987 }
988 free_path_split(path);
989 return pid;
990 }
991
992 static int try_shell_exec(const char *cmd, char *const *argv, char **env)
993 {
994 const char *interpr = parse_interpreter(cmd);
995 char **path;
996 char *prog;
997 int pid = 0;
998
999 if (!interpr)
1000 return 0;
1001 path = get_path_split();
1002 prog = path_lookup(interpr, path, 1);
1003 if (prog) {
1004 int argc = 0;
1005 const char **argv2;
1006 while (argv[argc]) argc++;
1007 argv2 = xmalloc(sizeof(*argv) * (argc+1));
1008 argv2[0] = (char *)cmd; /* full path to the script file */
1009 memcpy(&argv2[1], &argv[1], sizeof(*argv) * argc);
1010 pid = mingw_spawnve(prog, argv2, env, 1);
1011 if (pid >= 0) {
1012 int status;
1013 if (waitpid(pid, &status, 0) < 0)
1014 status = 255;
1015 exit(status);
1016 }
1017 pid = 1; /* indicate that we tried but failed */
1018 free(prog);
1019 free(argv2);
1020 }
1021 free_path_split(path);
1022 return pid;
1023 }
1024
1025 static void mingw_execve(const char *cmd, char *const *argv, char *const *env)
1026 {
1027 /* check if git_command is a shell script */
1028 if (!try_shell_exec(cmd, argv, (char **)env)) {
1029 int pid, status;
1030
1031 pid = mingw_spawnve(cmd, (const char **)argv, (char **)env, 0);
1032 if (pid < 0)
1033 return;
1034 if (waitpid(pid, &status, 0) < 0)
1035 status = 255;
1036 exit(status);
1037 }
1038 }
1039
1040 void mingw_execvp(const char *cmd, char *const *argv)
1041 {
1042 char **path = get_path_split();
1043 char *prog = path_lookup(cmd, path, 0);
1044
1045 if (prog) {
1046 mingw_execve(prog, argv, environ);
1047 free(prog);
1048 } else
1049 errno = ENOENT;
1050
1051 free_path_split(path);
1052 }
1053
1054 static char **copy_environ(void)
1055 {
1056 char **env;
1057 int i = 0;
1058 while (environ[i])
1059 i++;
1060 env = xmalloc((i+1)*sizeof(*env));
1061 for (i = 0; environ[i]; i++)
1062 env[i] = xstrdup(environ[i]);
1063 env[i] = NULL;
1064 return env;
1065 }
1066
1067 void free_environ(char **env)
1068 {
1069 int i;
1070 for (i = 0; env[i]; i++)
1071 free(env[i]);
1072 free(env);
1073 }
1074
1075 static int lookup_env(char **env, const char *name, size_t nmln)
1076 {
1077 int i;
1078
1079 for (i = 0; env[i]; i++) {
1080 if (0 == strncmp(env[i], name, nmln)
1081 && '=' == env[i][nmln])
1082 /* matches */
1083 return i;
1084 }
1085 return -1;
1086 }
1087
1088 /*
1089 * If name contains '=', then sets the variable, otherwise it unsets it
1090 */
1091 static char **env_setenv(char **env, const char *name)
1092 {
1093 char *eq = strchrnul(name, '=');
1094 int i = lookup_env(env, name, eq-name);
1095
1096 if (i < 0) {
1097 if (*eq) {
1098 for (i = 0; env[i]; i++)
1099 ;
1100 env = xrealloc(env, (i+2)*sizeof(*env));
1101 env[i] = xstrdup(name);
1102 env[i+1] = NULL;
1103 }
1104 }
1105 else {
1106 free(env[i]);
1107 if (*eq)
1108 env[i] = xstrdup(name);
1109 else
1110 for (; env[i]; i++)
1111 env[i] = env[i+1];
1112 }
1113 return env;
1114 }
1115
1116 /*
1117 * Copies global environ and adjusts variables as specified by vars.
1118 */
1119 char **make_augmented_environ(const char *const *vars)
1120 {
1121 char **env = copy_environ();
1122
1123 while (*vars)
1124 env = env_setenv(env, *vars++);
1125 return env;
1126 }
1127
1128 /*
1129 * Note, this isn't a complete replacement for getaddrinfo. It assumes
1130 * that service contains a numerical port, or that it it is null. It
1131 * does a simple search using gethostbyname, and returns one IPv4 host
1132 * if one was found.
1133 */
1134 static int WSAAPI getaddrinfo_stub(const char *node, const char *service,
1135 const struct addrinfo *hints,
1136 struct addrinfo **res)
1137 {
1138 struct hostent *h = gethostbyname(node);
1139 struct addrinfo *ai;
1140 struct sockaddr_in *sin;
1141
1142 if (!h)
1143 return WSAGetLastError();
1144
1145 ai = xmalloc(sizeof(struct addrinfo));
1146 *res = ai;
1147 ai->ai_flags = 0;
1148 ai->ai_family = AF_INET;
1149 ai->ai_socktype = hints->ai_socktype;
1150 switch (hints->ai_socktype) {
1151 case SOCK_STREAM:
1152 ai->ai_protocol = IPPROTO_TCP;
1153 break;
1154 case SOCK_DGRAM:
1155 ai->ai_protocol = IPPROTO_UDP;
1156 break;
1157 default:
1158 ai->ai_protocol = 0;
1159 break;
1160 }
1161 ai->ai_addrlen = sizeof(struct sockaddr_in);
1162 ai->ai_canonname = strdup(h->h_name);
1163
1164 sin = xmalloc(ai->ai_addrlen);
1165 memset(sin, 0, ai->ai_addrlen);
1166 sin->sin_family = AF_INET;
1167 if (service)
1168 sin->sin_port = htons(atoi(service));
1169 sin->sin_addr = *(struct in_addr *)h->h_addr;
1170 ai->ai_addr = (struct sockaddr *)sin;
1171 ai->ai_next = 0;
1172 return 0;
1173 }
1174
1175 static void WSAAPI freeaddrinfo_stub(struct addrinfo *res)
1176 {
1177 free(res->ai_canonname);
1178 free(res->ai_addr);
1179 free(res);
1180 }
1181
1182 static int WSAAPI getnameinfo_stub(const struct sockaddr *sa, socklen_t salen,
1183 char *host, DWORD hostlen,
1184 char *serv, DWORD servlen, int flags)
1185 {
1186 const struct sockaddr_in *sin = (const struct sockaddr_in *)sa;
1187 if (sa->sa_family != AF_INET)
1188 return EAI_FAMILY;
1189 if (!host && !serv)
1190 return EAI_NONAME;
1191
1192 if (host && hostlen > 0) {
1193 struct hostent *ent = NULL;
1194 if (!(flags & NI_NUMERICHOST))
1195 ent = gethostbyaddr((const char *)&sin->sin_addr,
1196 sizeof(sin->sin_addr), AF_INET);
1197
1198 if (ent)
1199 snprintf(host, hostlen, "%s", ent->h_name);
1200 else if (flags & NI_NAMEREQD)
1201 return EAI_NONAME;
1202 else
1203 snprintf(host, hostlen, "%s", inet_ntoa(sin->sin_addr));
1204 }
1205
1206 if (serv && servlen > 0) {
1207 struct servent *ent = NULL;
1208 if (!(flags & NI_NUMERICSERV))
1209 ent = getservbyport(sin->sin_port,
1210 flags & NI_DGRAM ? "udp" : "tcp");
1211
1212 if (ent)
1213 snprintf(serv, servlen, "%s", ent->s_name);
1214 else
1215 snprintf(serv, servlen, "%d", ntohs(sin->sin_port));
1216 }
1217
1218 return 0;
1219 }
1220
1221 static HMODULE ipv6_dll = NULL;
1222 static void (WSAAPI *ipv6_freeaddrinfo)(struct addrinfo *res);
1223 static int (WSAAPI *ipv6_getaddrinfo)(const char *node, const char *service,
1224 const struct addrinfo *hints,
1225 struct addrinfo **res);
1226 static int (WSAAPI *ipv6_getnameinfo)(const struct sockaddr *sa, socklen_t salen,
1227 char *host, DWORD hostlen,
1228 char *serv, DWORD servlen, int flags);
1229 /*
1230 * gai_strerror is an inline function in the ws2tcpip.h header, so we
1231 * don't need to try to load that one dynamically.
1232 */
1233
1234 static void socket_cleanup(void)
1235 {
1236 WSACleanup();
1237 if (ipv6_dll)
1238 FreeLibrary(ipv6_dll);
1239 ipv6_dll = NULL;
1240 ipv6_freeaddrinfo = freeaddrinfo_stub;
1241 ipv6_getaddrinfo = getaddrinfo_stub;
1242 ipv6_getnameinfo = getnameinfo_stub;
1243 }
1244
1245 static void ensure_socket_initialization(void)
1246 {
1247 WSADATA wsa;
1248 static int initialized = 0;
1249 const char *libraries[] = { "ws2_32.dll", "wship6.dll", NULL };
1250 const char **name;
1251
1252 if (initialized)
1253 return;
1254
1255 if (WSAStartup(MAKEWORD(2,2), &wsa))
1256 die("unable to initialize winsock subsystem, error %d",
1257 WSAGetLastError());
1258
1259 for (name = libraries; *name; name++) {
1260 ipv6_dll = LoadLibrary(*name);
1261 if (!ipv6_dll)
1262 continue;
1263
1264 ipv6_freeaddrinfo = (void (WSAAPI *)(struct addrinfo *))
1265 GetProcAddress(ipv6_dll, "freeaddrinfo");
1266 ipv6_getaddrinfo = (int (WSAAPI *)(const char *, const char *,
1267 const struct addrinfo *,
1268 struct addrinfo **))
1269 GetProcAddress(ipv6_dll, "getaddrinfo");
1270 ipv6_getnameinfo = (int (WSAAPI *)(const struct sockaddr *,
1271 socklen_t, char *, DWORD,
1272 char *, DWORD, int))
1273 GetProcAddress(ipv6_dll, "getnameinfo");
1274 if (!ipv6_freeaddrinfo || !ipv6_getaddrinfo || !ipv6_getnameinfo) {
1275 FreeLibrary(ipv6_dll);
1276 ipv6_dll = NULL;
1277 } else
1278 break;
1279 }
1280 if (!ipv6_freeaddrinfo || !ipv6_getaddrinfo || !ipv6_getnameinfo) {
1281 ipv6_freeaddrinfo = freeaddrinfo_stub;
1282 ipv6_getaddrinfo = getaddrinfo_stub;
1283 ipv6_getnameinfo = getnameinfo_stub;
1284 }
1285
1286 atexit(socket_cleanup);
1287 initialized = 1;
1288 }
1289
1290 #undef gethostbyname
1291 struct hostent *mingw_gethostbyname(const char *host)
1292 {
1293 ensure_socket_initialization();
1294 return gethostbyname(host);
1295 }
1296
1297 void mingw_freeaddrinfo(struct addrinfo *res)
1298 {
1299 ipv6_freeaddrinfo(res);
1300 }
1301
1302 int mingw_getaddrinfo(const char *node, const char *service,
1303 const struct addrinfo *hints, struct addrinfo **res)
1304 {
1305 ensure_socket_initialization();
1306 return ipv6_getaddrinfo(node, service, hints, res);
1307 }
1308
1309 int mingw_getnameinfo(const struct sockaddr *sa, socklen_t salen,
1310 char *host, DWORD hostlen, char *serv, DWORD servlen,
1311 int flags)
1312 {
1313 ensure_socket_initialization();
1314 return ipv6_getnameinfo(sa, salen, host, hostlen, serv, servlen, flags);
1315 }
1316
1317 int mingw_socket(int domain, int type, int protocol)
1318 {
1319 int sockfd;
1320 SOCKET s = WSASocket(domain, type, protocol, NULL, 0, 0);
1321 if (s == INVALID_SOCKET) {
1322 /*
1323 * WSAGetLastError() values are regular BSD error codes
1324 * biased by WSABASEERR.
1325 * However, strerror() does not know about networking
1326 * specific errors, which are values beginning at 38 or so.
1327 * Therefore, we choose to leave the biased error code
1328 * in errno so that _if_ someone looks up the code somewhere,
1329 * then it is at least the number that are usually listed.
1330 */
1331 errno = WSAGetLastError();
1332 return -1;
1333 }
1334 /* convert into a file descriptor */
1335 if ((sockfd = _open_osfhandle(s, O_RDWR|O_BINARY)) < 0) {
1336 closesocket(s);
1337 return error("unable to make a socket file descriptor: %s",
1338 strerror(errno));
1339 }
1340 return sockfd;
1341 }
1342
1343 #undef connect
1344 int mingw_connect(int sockfd, struct sockaddr *sa, size_t sz)
1345 {
1346 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
1347 return connect(s, sa, sz);
1348 }
1349
1350 #undef rename
1351 int mingw_rename(const char *pold, const char *pnew)
1352 {
1353 DWORD attrs, gle;
1354 int tries = 0;
1355
1356 /*
1357 * Try native rename() first to get errno right.
1358 * It is based on MoveFile(), which cannot overwrite existing files.
1359 */
1360 if (!rename(pold, pnew))
1361 return 0;
1362 if (errno != EEXIST)
1363 return -1;
1364 repeat:
1365 if (MoveFileEx(pold, pnew, MOVEFILE_REPLACE_EXISTING))
1366 return 0;
1367 /* TODO: translate more errors */
1368 gle = GetLastError();
1369 if (gle == ERROR_ACCESS_DENIED &&
1370 (attrs = GetFileAttributes(pnew)) != INVALID_FILE_ATTRIBUTES) {
1371 if (attrs & FILE_ATTRIBUTE_DIRECTORY) {
1372 errno = EISDIR;
1373 return -1;
1374 }
1375 if ((attrs & FILE_ATTRIBUTE_READONLY) &&
1376 SetFileAttributes(pnew, attrs & ~FILE_ATTRIBUTE_READONLY)) {
1377 if (MoveFileEx(pold, pnew, MOVEFILE_REPLACE_EXISTING))
1378 return 0;
1379 gle = GetLastError();
1380 /* revert file attributes on failure */
1381 SetFileAttributes(pnew, attrs);
1382 }
1383 }
1384 if (tries < ARRAY_SIZE(delay) && gle == ERROR_ACCESS_DENIED) {
1385 /*
1386 * We assume that some other process had the source or
1387 * destination file open at the wrong moment and retry.
1388 * In order to give the other process a higher chance to
1389 * complete its operation, we give up our time slice now.
1390 * If we have to retry again, we do sleep a bit.
1391 */
1392 Sleep(delay[tries]);
1393 tries++;
1394 goto repeat;
1395 }
1396 if (gle == ERROR_ACCESS_DENIED &&
1397 ask_user_yes_no("Rename from '%s' to '%s' failed. "
1398 "Should I try again?", pold, pnew))
1399 goto repeat;
1400
1401 errno = EACCES;
1402 return -1;
1403 }
1404
1405 /*
1406 * Note that this doesn't return the actual pagesize, but
1407 * the allocation granularity. If future Windows specific git code
1408 * needs the real getpagesize function, we need to find another solution.
1409 */
1410 int mingw_getpagesize(void)
1411 {
1412 SYSTEM_INFO si;
1413 GetSystemInfo(&si);
1414 return si.dwAllocationGranularity;
1415 }
1416
1417 struct passwd *getpwuid(int uid)
1418 {
1419 static char user_name[100];
1420 static struct passwd p;
1421
1422 DWORD len = sizeof(user_name);
1423 if (!GetUserName(user_name, &len))
1424 return NULL;
1425 p.pw_name = user_name;
1426 p.pw_gecos = "unknown";
1427 p.pw_dir = NULL;
1428 return &p;
1429 }
1430
1431 static HANDLE timer_event;
1432 static HANDLE timer_thread;
1433 static int timer_interval;
1434 static int one_shot;
1435 static sig_handler_t timer_fn = SIG_DFL;
1436
1437 /* The timer works like this:
1438 * The thread, ticktack(), is a trivial routine that most of the time
1439 * only waits to receive the signal to terminate. The main thread tells
1440 * the thread to terminate by setting the timer_event to the signalled
1441 * state.
1442 * But ticktack() interrupts the wait state after the timer's interval
1443 * length to call the signal handler.
1444 */
1445
1446 static unsigned __stdcall ticktack(void *dummy)
1447 {
1448 while (WaitForSingleObject(timer_event, timer_interval) == WAIT_TIMEOUT) {
1449 if (timer_fn == SIG_DFL)
1450 die("Alarm");
1451 if (timer_fn != SIG_IGN)
1452 timer_fn(SIGALRM);
1453 if (one_shot)
1454 break;
1455 }
1456 return 0;
1457 }
1458
1459 static int start_timer_thread(void)
1460 {
1461 timer_event = CreateEvent(NULL, FALSE, FALSE, NULL);
1462 if (timer_event) {
1463 timer_thread = (HANDLE) _beginthreadex(NULL, 0, ticktack, NULL, 0, NULL);
1464 if (!timer_thread )
1465 return errno = ENOMEM,
1466 error("cannot start timer thread");
1467 } else
1468 return errno = ENOMEM,
1469 error("cannot allocate resources for timer");
1470 return 0;
1471 }
1472
1473 static void stop_timer_thread(void)
1474 {
1475 if (timer_event)
1476 SetEvent(timer_event); /* tell thread to terminate */
1477 if (timer_thread) {
1478 int rc = WaitForSingleObject(timer_thread, 1000);
1479 if (rc == WAIT_TIMEOUT)
1480 error("timer thread did not terminate timely");
1481 else if (rc != WAIT_OBJECT_0)
1482 error("waiting for timer thread failed: %lu",
1483 GetLastError());
1484 CloseHandle(timer_thread);
1485 }
1486 if (timer_event)
1487 CloseHandle(timer_event);
1488 timer_event = NULL;
1489 timer_thread = NULL;
1490 }
1491
1492 static inline int is_timeval_eq(const struct timeval *i1, const struct timeval *i2)
1493 {
1494 return i1->tv_sec == i2->tv_sec && i1->tv_usec == i2->tv_usec;
1495 }
1496
1497 int setitimer(int type, struct itimerval *in, struct itimerval *out)
1498 {
1499 static const struct timeval zero;
1500 static int atexit_done;
1501
1502 if (out != NULL)
1503 return errno = EINVAL,
1504 error("setitimer param 3 != NULL not implemented");
1505 if (!is_timeval_eq(&in->it_interval, &zero) &&
1506 !is_timeval_eq(&in->it_interval, &in->it_value))
1507 return errno = EINVAL,
1508 error("setitimer: it_interval must be zero or eq it_value");
1509
1510 if (timer_thread)
1511 stop_timer_thread();
1512
1513 if (is_timeval_eq(&in->it_value, &zero) &&
1514 is_timeval_eq(&in->it_interval, &zero))
1515 return 0;
1516
1517 timer_interval = in->it_value.tv_sec * 1000 + in->it_value.tv_usec / 1000;
1518 one_shot = is_timeval_eq(&in->it_interval, &zero);
1519 if (!atexit_done) {
1520 atexit(stop_timer_thread);
1521 atexit_done = 1;
1522 }
1523 return start_timer_thread();
1524 }
1525
1526 int sigaction(int sig, struct sigaction *in, struct sigaction *out)
1527 {
1528 if (sig != SIGALRM)
1529 return errno = EINVAL,
1530 error("sigaction only implemented for SIGALRM");
1531 if (out != NULL)
1532 return errno = EINVAL,
1533 error("sigaction: param 3 != NULL not implemented");
1534
1535 timer_fn = in->sa_handler;
1536 return 0;
1537 }
1538
1539 #undef signal
1540 sig_handler_t mingw_signal(int sig, sig_handler_t handler)
1541 {
1542 sig_handler_t old = timer_fn;
1543 if (sig != SIGALRM)
1544 return signal(sig, handler);
1545 timer_fn = handler;
1546 return old;
1547 }
1548
1549 static const char *make_backslash_path(const char *path)
1550 {
1551 static char buf[PATH_MAX + 1];
1552 char *c;
1553
1554 if (strlcpy(buf, path, PATH_MAX) >= PATH_MAX)
1555 die("Too long path: %.*s", 60, path);
1556
1557 for (c = buf; *c; c++) {
1558 if (*c == '/')
1559 *c = '\\';
1560 }
1561 return buf;
1562 }
1563
1564 void mingw_open_html(const char *unixpath)
1565 {
1566 const char *htmlpath = make_backslash_path(unixpath);
1567 typedef HINSTANCE (WINAPI *T)(HWND, const char *,
1568 const char *, const char *, const char *, INT);
1569 T ShellExecute;
1570 HMODULE shell32;
1571 int r;
1572
1573 shell32 = LoadLibrary("shell32.dll");
1574 if (!shell32)
1575 die("cannot load shell32.dll");
1576 ShellExecute = (T)GetProcAddress(shell32, "ShellExecuteA");
1577 if (!ShellExecute)
1578 die("cannot run browser");
1579
1580 printf("Launching default browser to display HTML ...\n");
1581 r = (int)ShellExecute(NULL, "open", htmlpath, NULL, "\\", SW_SHOWNORMAL);
1582 FreeLibrary(shell32);
1583 /* see the MSDN documentation referring to the result codes here */
1584 if (r <= 32) {
1585 die("failed to launch browser for %.*s", MAX_PATH, unixpath);
1586 }
1587 }
1588
1589 int link(const char *oldpath, const char *newpath)
1590 {
1591 typedef BOOL (WINAPI *T)(const char*, const char*, LPSECURITY_ATTRIBUTES);
1592 static T create_hard_link = NULL;
1593 if (!create_hard_link) {
1594 create_hard_link = (T) GetProcAddress(
1595 GetModuleHandle("kernel32.dll"), "CreateHardLinkA");
1596 if (!create_hard_link)
1597 create_hard_link = (T)-1;
1598 }
1599 if (create_hard_link == (T)-1) {
1600 errno = ENOSYS;
1601 return -1;
1602 }
1603 if (!create_hard_link(newpath, oldpath, NULL)) {
1604 errno = err_win_to_posix(GetLastError());
1605 return -1;
1606 }
1607 return 0;
1608 }
1609
1610 char *getpass(const char *prompt)
1611 {
1612 struct strbuf buf = STRBUF_INIT;
1613
1614 fputs(prompt, stderr);
1615 for (;;) {
1616 char c = _getch();
1617 if (c == '\r' || c == '\n')
1618 break;
1619 strbuf_addch(&buf, c);
1620 }
1621 fputs("\n", stderr);
1622 return strbuf_detach(&buf, NULL);
1623 }
1624
1625 #ifndef NO_MINGW_REPLACE_READDIR
1626 /* MinGW readdir implementation to avoid extra lstats for Git */
1627 struct mingw_DIR
1628 {
1629 struct _finddata_t dd_dta; /* disk transfer area for this dir */
1630 struct mingw_dirent dd_dir; /* Our own implementation, including d_type */
1631 long dd_handle; /* _findnext handle */
1632 int dd_stat; /* 0 = next entry to read is first entry, -1 = off the end, positive = 0 based index of next entry */
1633 char dd_name[1]; /* given path for dir with search pattern (struct is extended) */
1634 };
1635
1636 struct dirent *mingw_readdir(DIR *dir)
1637 {
1638 WIN32_FIND_DATAA buf;
1639 HANDLE handle;
1640 struct mingw_DIR *mdir = (struct mingw_DIR*)dir;
1641
1642 if (!dir->dd_handle) {
1643 errno = EBADF; /* No set_errno for mingw */
1644 return NULL;
1645 }
1646
1647 if (dir->dd_handle == (long)INVALID_HANDLE_VALUE && dir->dd_stat == 0)
1648 {
1649 DWORD lasterr;
1650 handle = FindFirstFileA(dir->dd_name, &buf);
1651 lasterr = GetLastError();
1652 dir->dd_handle = (long)handle;
1653 if (handle == INVALID_HANDLE_VALUE && (lasterr != ERROR_NO_MORE_FILES)) {
1654 errno = err_win_to_posix(lasterr);
1655 return NULL;
1656 }
1657 } else if (dir->dd_handle == (long)INVALID_HANDLE_VALUE) {
1658 return NULL;
1659 } else if (!FindNextFileA((HANDLE)dir->dd_handle, &buf)) {
1660 DWORD lasterr = GetLastError();
1661 FindClose((HANDLE)dir->dd_handle);
1662 dir->dd_handle = (long)INVALID_HANDLE_VALUE;
1663 /* POSIX says you shouldn't set errno when readdir can't
1664 find any more files; so, if another error we leave it set. */
1665 if (lasterr != ERROR_NO_MORE_FILES)
1666 errno = err_win_to_posix(lasterr);
1667 return NULL;
1668 }
1669
1670 /* We get here if `buf' contains valid data. */
1671 strcpy(dir->dd_dir.d_name, buf.cFileName);
1672 ++dir->dd_stat;
1673
1674 /* Set file type, based on WIN32_FIND_DATA */
1675 mdir->dd_dir.d_type = 0;
1676 if (buf.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)
1677 mdir->dd_dir.d_type |= DT_DIR;
1678 else
1679 mdir->dd_dir.d_type |= DT_REG;
1680
1681 return (struct dirent*)&dir->dd_dir;
1682 }
1683 #endif // !NO_MINGW_REPLACE_READDIR
The MinGW fork, forked for msysGit