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Work around the command line limit on Windows
[git/mingw/4msysgit.git] / compat / mingw.c
blob2443bc4746f532de0aa10a6741717c76576186b2
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 && make_hidden(dir))
136 warning("Failed to make '%s' hidden", dir);
137 git_config_set("core.hideDotFiles",
138 hide_dotfiles == HIDE_DOTFILES_FALSE ? "false" :
139 (hide_dotfiles == HIDE_DOTFILES_DOTGITONLY ?
140 "dotGitOnly" : "true"));
141 }
142
143 #undef mkdir
144 int mingw_mkdir(const char *path, int mode)
145 {
146 int ret = mkdir(path);
147 if (!ret && hide_dotfiles == HIDE_DOTFILES_TRUE) {
148 /*
149 * In Windows a file or dir starting with a dot is not
150 * automatically hidden. So lets mark it as hidden when
151 * such a directory is created.
152 */
153 const char *start = basename((char*)path);
154 if (*start == '.')
155 return make_hidden(path);
156 }
157 return ret;
158 }
159
160 static int ask_user_yes_no(const char *format, ...)
161 {
162 char answer[5];
163 char question[4096];
164 const char *retry_hook[] = { NULL, NULL, NULL };
165 va_list args;
166
167 if ((retry_hook[0] = getenv("GIT_ASK_YESNO"))) {
168
169 va_start(args, format);
170 vsnprintf(question, sizeof(question), format, args);
171 va_end(args);
172
173 retry_hook[1] = question;
174 return !run_command_v_opt(retry_hook, 0);
175 }
176
177 if (!isatty(_fileno(stdin)))
178 return 0;
179
180 while (1) {
181 va_start(args, format);
182 vfprintf(stderr, format, args);
183 va_end(args);
184 fprintf(stderr, " (y/n)? ");
185
186 if (fgets(answer, sizeof(answer), stdin)) {
187 /* remove the newline */
188 if (answer[strlen(answer)-2] == '\r')
189 answer[strlen(answer)-2] = '\0';
190 if (answer[strlen(answer)-1] == '\n')
191 answer[strlen(answer)-1] = '\0';
192 } else
193 return 0;
194
195 if (answer[0] == 'y' && strlen(answer) == 1)
196 return 1;
197 if (!strncasecmp(answer, "yes", sizeof(answer)))
198 return 1;
199 if (answer[0] == 'n' && strlen(answer) == 1)
200 return 0;
201 if (!strncasecmp(answer, "no", sizeof(answer)))
202 return 0;
203 fprintf(stderr, "I did not understand your answer: '%s'\n",
204 answer);
205 }
206 }
207
208 #undef unlink
209 int mingw_unlink(const char *pathname)
210 {
211 int ret, tries = 0;
212
213 /* read-only files cannot be removed */
214 chmod(pathname, 0666);
215 while ((ret = unlink(pathname)) == -1 && tries < ARRAY_SIZE(delay)) {
216 if (errno != EACCES)
217 break;
218 /*
219 * We assume that some other process had the source or
220 * destination file open at the wrong moment and retry.
221 * In order to give the other process a higher chance to
222 * complete its operation, we give up our time slice now.
223 * If we have to retry again, we do sleep a bit.
224 */
225 Sleep(delay[tries]);
226 tries++;
227 }
228 while (ret == -1 && errno == EACCES &&
229 ask_user_yes_no("Unlink of file '%s' failed. "
230 "Should I try again?", pathname))
231 ret = unlink(pathname);
232 return ret;
233 }
234
235 #undef rmdir
236 int mingw_rmdir(const char *pathname)
237 {
238 int ret, tries = 0;
239
240 while ((ret = rmdir(pathname)) == -1 && tries < ARRAY_SIZE(delay)) {
241 if (errno != EACCES)
242 break;
243 /*
244 * We assume that some other process had the source or
245 * destination file open at the wrong moment and retry.
246 * In order to give the other process a higher chance to
247 * complete its operation, we give up our time slice now.
248 * If we have to retry again, we do sleep a bit.
249 */
250 Sleep(delay[tries]);
251 tries++;
252 }
253 while (ret == -1 && errno == EACCES &&
254 ask_user_yes_no("Deletion of directory '%s' failed. "
255 "Should I try again?", pathname))
256 ret = rmdir(pathname);
257 return ret;
258 }
259
260 #undef open
261 int mingw_open (const char *filename, int oflags, ...)
262 {
263 va_list args;
264 unsigned mode;
265 int fd;
266
267 va_start(args, oflags);
268 mode = va_arg(args, int);
269 va_end(args);
270
271 if (filename && !strcmp(filename, "/dev/null"))
272 filename = "nul";
273
274 fd = open(filename, oflags, mode);
275
276 if (fd < 0 && (oflags & O_CREAT) && errno == EACCES) {
277 DWORD attrs = GetFileAttributes(filename);
278 if (attrs != INVALID_FILE_ATTRIBUTES && (attrs & FILE_ATTRIBUTE_DIRECTORY))
279 errno = EISDIR;
280 }
281 if ((oflags & O_CREAT) && fd >= 0 &&
282 hide_dotfiles == HIDE_DOTFILES_TRUE) {
283 /*
284 * In Windows a file or dir starting with a dot is not
285 * automatically hidden. So lets mark it as hidden when
286 * such a file is created.
287 */
288 const char *start = basename((char*)filename);
289 if (*start == '.' && make_hidden(filename))
290 warning("Could not mark '%s' as hidden.", filename);
291 }
292 return fd;
293 }
294
295 #undef write
296 ssize_t mingw_write(int fd, const void *buf, size_t count)
297 {
298 /*
299 * While write() calls to a file on a local disk are translated
300 * into WriteFile() calls with a maximum size of 64KB on Windows
301 * XP and 256KB on Vista, no such cap is placed on writes to
302 * files over the network on Windows XP. Unfortunately, there
303 * seems to be a limit of 32MB-28KB on X64 and 64MB-32KB on x86;
304 * bigger writes fail on Windows XP.
305 * So we cap to a nice 31MB here to avoid write failures over
306 * the net without changing the number of WriteFile() calls in
307 * the local case.
308 */
309 return write(fd, buf, min(count, 31 * 1024 * 1024));
310 }
311
312 #undef fopen
313 FILE *mingw_fopen (const char *filename, const char *otype)
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 = fopen(filename, otype);
323 if (file && hide && make_hidden(filename))
324 warning("Could not mark '%s' as hidden.", filename);
325 return file;
326 }
327
328 #undef freopen
329 FILE *mingw_freopen (const char *filename, const char *otype, FILE *stream)
330 {
331 int hide = 0;
332 FILE *file;
333 if (hide_dotfiles == HIDE_DOTFILES_TRUE &&
334 basename((char*)filename)[0] == '.')
335 hide = access(filename, F_OK);
336 if (filename && !strcmp(filename, "/dev/null"))
337 filename = "nul";
338 file = freopen(filename, otype, stream);
339 if (file && hide && make_hidden(filename))
340 warning("Could not mark '%s' as hidden.", filename);
341 return file;
342 }
343
344 /*
345 * The unit of FILETIME is 100-nanoseconds since January 1, 1601, UTC.
346 * Returns the 100-nanoseconds ("hekto nanoseconds") since the epoch.
347 */
348 static inline long long filetime_to_hnsec(const FILETIME *ft)
349 {
350 long long winTime = ((long long)ft->dwHighDateTime << 32) + ft->dwLowDateTime;
351 /* Windows to Unix Epoch conversion */
352 return winTime - 116444736000000000LL;
353 }
354
355 static inline time_t filetime_to_time_t(const FILETIME *ft)
356 {
357 return (time_t)(filetime_to_hnsec(ft) / 10000000);
358 }
359
360 /* We keep the do_lstat code in a separate function to avoid recursion.
361 * When a path ends with a slash, the stat will fail with ENOENT. In
362 * this case, we strip the trailing slashes and stat again.
363 *
364 * If follow is true then act like stat() and report on the link
365 * target. Otherwise report on the link itself.
366 */
367 static int do_lstat(int follow, const char *file_name, struct stat *buf)
368 {
369 WIN32_FILE_ATTRIBUTE_DATA fdata;
370
371 if (!(errno = get_file_attr(file_name, &fdata))) {
372 buf->st_ino = 0;
373 buf->st_gid = 0;
374 buf->st_uid = 0;
375 buf->st_nlink = 1;
376 buf->st_mode = file_attr_to_st_mode(fdata.dwFileAttributes);
377 buf->st_size = fdata.nFileSizeLow |
378 (((off_t)fdata.nFileSizeHigh)<<32);
379 buf->st_dev = buf->st_rdev = 0; /* not used by Git */
380 buf->st_atime = filetime_to_time_t(&(fdata.ftLastAccessTime));
381 buf->st_mtime = filetime_to_time_t(&(fdata.ftLastWriteTime));
382 buf->st_ctime = filetime_to_time_t(&(fdata.ftCreationTime));
383 if (fdata.dwFileAttributes & FILE_ATTRIBUTE_REPARSE_POINT) {
384 WIN32_FIND_DATAA findbuf;
385 HANDLE handle = FindFirstFileA(file_name, &findbuf);
386 if (handle != INVALID_HANDLE_VALUE) {
387 if ((findbuf.dwFileAttributes & FILE_ATTRIBUTE_REPARSE_POINT) &&
388 (findbuf.dwReserved0 == IO_REPARSE_TAG_SYMLINK)) {
389 if (follow) {
390 char buffer[MAXIMUM_REPARSE_DATA_BUFFER_SIZE];
391 buf->st_size = readlink(file_name, buffer, MAXIMUM_REPARSE_DATA_BUFFER_SIZE);
392 } else {
393 buf->st_mode = S_IFLNK;
394 }
395 buf->st_mode |= S_IREAD;
396 if (!(findbuf.dwFileAttributes & FILE_ATTRIBUTE_READONLY))
397 buf->st_mode |= S_IWRITE;
398 }
399 FindClose(handle);
400 }
401 }
402 return 0;
403 }
404 return -1;
405 }
406
407 /* We provide our own lstat/fstat functions, since the provided
408 * lstat/fstat functions are so slow. These stat functions are
409 * tailored for Git's usage (read: fast), and are not meant to be
410 * complete. Note that Git stat()s are redirected to mingw_lstat()
411 * too, since Windows doesn't really handle symlinks that well.
412 */
413 static int do_stat_internal(int follow, const char *file_name, struct stat *buf)
414 {
415 int namelen;
416 static char alt_name[PATH_MAX];
417
418 if (!do_lstat(follow, file_name, buf))
419 return 0;
420
421 /* if file_name ended in a '/', Windows returned ENOENT;
422 * try again without trailing slashes
423 */
424 if (errno != ENOENT)
425 return -1;
426
427 namelen = strlen(file_name);
428 if (namelen && file_name[namelen-1] != '/')
429 return -1;
430 while (namelen && file_name[namelen-1] == '/')
431 --namelen;
432 if (!namelen || namelen >= PATH_MAX)
433 return -1;
434
435 memcpy(alt_name, file_name, namelen);
436 alt_name[namelen] = 0;
437 return do_lstat(follow, alt_name, buf);
438 }
439
440 int mingw_lstat(const char *file_name, struct stat *buf)
441 {
442 return do_stat_internal(0, file_name, buf);
443 }
444 int mingw_stat(const char *file_name, struct stat *buf)
445 {
446 return do_stat_internal(1, file_name, buf);
447 }
448
449 #undef fstat
450 int mingw_fstat(int fd, struct stat *buf)
451 {
452 HANDLE fh = (HANDLE)_get_osfhandle(fd);
453 BY_HANDLE_FILE_INFORMATION fdata;
454
455 if (fh == INVALID_HANDLE_VALUE) {
456 errno = EBADF;
457 return -1;
458 }
459 /* direct non-file handles to MS's fstat() */
460 if (GetFileType(fh) != FILE_TYPE_DISK)
461 return _fstati64(fd, buf);
462
463 if (GetFileInformationByHandle(fh, &fdata)) {
464 buf->st_ino = 0;
465 buf->st_gid = 0;
466 buf->st_uid = 0;
467 buf->st_nlink = 1;
468 buf->st_mode = file_attr_to_st_mode(fdata.dwFileAttributes);
469 buf->st_size = fdata.nFileSizeLow |
470 (((off_t)fdata.nFileSizeHigh)<<32);
471 buf->st_dev = buf->st_rdev = 0; /* not used by Git */
472 buf->st_atime = filetime_to_time_t(&(fdata.ftLastAccessTime));
473 buf->st_mtime = filetime_to_time_t(&(fdata.ftLastWriteTime));
474 buf->st_ctime = filetime_to_time_t(&(fdata.ftCreationTime));
475 return 0;
476 }
477 errno = EBADF;
478 return -1;
479 }
480
481 static inline void time_t_to_filetime(time_t t, FILETIME *ft)
482 {
483 long long winTime = t * 10000000LL + 116444736000000000LL;
484 ft->dwLowDateTime = winTime;
485 ft->dwHighDateTime = winTime >> 32;
486 }
487
488 int mingw_utime (const char *file_name, const struct utimbuf *times)
489 {
490 FILETIME mft, aft;
491 int fh, rc;
492
493 /* must have write permission */
494 DWORD attrs = GetFileAttributes(file_name);
495 if (attrs != INVALID_FILE_ATTRIBUTES &&
496 (attrs & FILE_ATTRIBUTE_READONLY)) {
497 /* ignore errors here; open() will report them */
498 SetFileAttributes(file_name, attrs & ~FILE_ATTRIBUTE_READONLY);
499 }
500
501 if ((fh = open(file_name, O_RDWR | O_BINARY)) < 0) {
502 rc = -1;
503 goto revert_attrs;
504 }
505
506 if (times) {
507 time_t_to_filetime(times->modtime, &mft);
508 time_t_to_filetime(times->actime, &aft);
509 } else {
510 GetSystemTimeAsFileTime(&mft);
511 aft = mft;
512 }
513 if (!SetFileTime((HANDLE)_get_osfhandle(fh), NULL, &aft, &mft)) {
514 errno = EINVAL;
515 rc = -1;
516 } else
517 rc = 0;
518 close(fh);
519
520 revert_attrs:
521 if (attrs != INVALID_FILE_ATTRIBUTES &&
522 (attrs & FILE_ATTRIBUTE_READONLY)) {
523 /* ignore errors again */
524 SetFileAttributes(file_name, attrs);
525 }
526 return rc;
527 }
528
529 unsigned int sleep (unsigned int seconds)
530 {
531 Sleep(seconds*1000);
532 return 0;
533 }
534
535 int mkstemp(char *template)
536 {
537 char *filename = mktemp(template);
538 if (filename == NULL)
539 return -1;
540 return open(filename, O_RDWR | O_CREAT, 0600);
541 }
542
543 int gettimeofday(struct timeval *tv, void *tz)
544 {
545 FILETIME ft;
546 long long hnsec;
547
548 GetSystemTimeAsFileTime(&ft);
549 hnsec = filetime_to_hnsec(&ft);
550 tv->tv_sec = hnsec / 10000000;
551 tv->tv_usec = (hnsec % 10000000) / 10;
552 return 0;
553 }
554
555 int pipe(int filedes[2])
556 {
557 HANDLE h[2];
558
559 /* this creates non-inheritable handles */
560 if (!CreatePipe(&h[0], &h[1], NULL, 8192)) {
561 errno = err_win_to_posix(GetLastError());
562 return -1;
563 }
564 filedes[0] = _open_osfhandle((int)h[0], O_NOINHERIT);
565 if (filedes[0] < 0) {
566 CloseHandle(h[0]);
567 CloseHandle(h[1]);
568 return -1;
569 }
570 filedes[1] = _open_osfhandle((int)h[1], O_NOINHERIT);
571 if (filedes[0] < 0) {
572 close(filedes[0]);
573 CloseHandle(h[1]);
574 return -1;
575 }
576 return 0;
577 }
578
579 int poll(struct pollfd *ufds, unsigned int nfds, int timeout)
580 {
581 int i, pending;
582
583 if (timeout >= 0) {
584 if (nfds == 0) {
585 Sleep(timeout);
586 return 0;
587 }
588 return errno = EINVAL, error("poll timeout not supported");
589 }
590
591 /* When there is only one fd to wait for, then we pretend that
592 * input is available and let the actual wait happen when the
593 * caller invokes read().
594 */
595 if (nfds == 1) {
596 if (!(ufds[0].events & POLLIN))
597 return errno = EINVAL, error("POLLIN not set");
598 ufds[0].revents = POLLIN;
599 return 0;
600 }
601
602 repeat:
603 pending = 0;
604 for (i = 0; i < nfds; i++) {
605 DWORD avail = 0;
606 HANDLE h = (HANDLE) _get_osfhandle(ufds[i].fd);
607 if (h == INVALID_HANDLE_VALUE)
608 return -1; /* errno was set */
609
610 if (!(ufds[i].events & POLLIN))
611 return errno = EINVAL, error("POLLIN not set");
612
613 /* this emulation works only for pipes */
614 if (!PeekNamedPipe(h, NULL, 0, NULL, &avail, NULL)) {
615 int err = GetLastError();
616 if (err == ERROR_BROKEN_PIPE) {
617 ufds[i].revents = POLLHUP;
618 pending++;
619 } else {
620 errno = EINVAL;
621 return error("PeekNamedPipe failed,"
622 " GetLastError: %u", err);
623 }
624 } else if (avail) {
625 ufds[i].revents = POLLIN;
626 pending++;
627 } else
628 ufds[i].revents = 0;
629 }
630 if (!pending) {
631 /* The only times that we spin here is when the process
632 * that is connected through the pipes is waiting for
633 * its own input data to become available. But since
634 * the process (pack-objects) is itself CPU intensive,
635 * it will happily pick up the time slice that we are
636 * relinquishing here.
637 */
638 Sleep(0);
639 goto repeat;
640 }
641 return 0;
642 }
643
644 struct tm *gmtime_r(const time_t *timep, struct tm *result)
645 {
646 /* gmtime() in MSVCRT.DLL is thread-safe, but not reentrant */
647 memcpy(result, gmtime(timep), sizeof(struct tm));
648 return result;
649 }
650
651 struct tm *localtime_r(const time_t *timep, struct tm *result)
652 {
653 /* localtime() in MSVCRT.DLL is thread-safe, but not reentrant */
654 memcpy(result, localtime(timep), sizeof(struct tm));
655 return result;
656 }
657
658 #undef getcwd
659 char *mingw_getcwd(char *pointer, int len)
660 {
661 int i;
662 char *ret = getcwd(pointer, len);
663 if (!ret)
664 return ret;
665 for (i = 0; pointer[i]; i++)
666 if (pointer[i] == '\\')
667 pointer[i] = '/';
668 return ret;
669 }
670
671 #undef getenv
672 char *mingw_getenv(const char *name)
673 {
674 char *result = getenv(name);
675 if (!result && !strcmp(name, "TMPDIR")) {
676 /* on Windows it is TMP and TEMP */
677 result = getenv("TMP");
678 if (!result)
679 result = getenv("TEMP");
680 }
681 return result;
682 }
683
684 /*
685 * See http://msdn2.microsoft.com/en-us/library/17w5ykft(vs.71).aspx
686 * (Parsing C++ Command-Line Arguments)
687 */
688 static const char *quote_arg(const char *arg)
689 {
690 /* count chars to quote */
691 int len = 0, n = 0;
692 int force_quotes = 0;
693 char *q, *d;
694 const char *p = arg;
695 if (!*p) force_quotes = 1;
696 while (*p) {
697 if (isspace(*p) || *p == '*' || *p == '?' || *p == '{' || *p == '\'')
698 force_quotes = 1;
699 else if (*p == '"')
700 n++;
701 else if (*p == '\\') {
702 int count = 0;
703 while (*p == '\\') {
704 count++;
705 p++;
706 len++;
707 }
708 if (*p == '"')
709 n += count*2 + 1;
710 continue;
711 }
712 len++;
713 p++;
714 }
715 if (!force_quotes && n == 0)
716 return arg;
717
718 /* insert \ where necessary */
719 d = q = xmalloc(len+n+3);
720 *d++ = '"';
721 while (*arg) {
722 if (*arg == '"')
723 *d++ = '\\';
724 else if (*arg == '\\') {
725 int count = 0;
726 while (*arg == '\\') {
727 count++;
728 *d++ = *arg++;
729 }
730 if (*arg == '"') {
731 while (count-- > 0)
732 *d++ = '\\';
733 *d++ = '\\';
734 }
735 }
736 *d++ = *arg++;
737 }
738 *d++ = '"';
739 *d++ = 0;
740 return q;
741 }
742
743 static const char *parse_interpreter(const char *cmd)
744 {
745 static char buf[100];
746 char *p, *opt;
747 int n, fd;
748
749 /* don't even try a .exe */
750 n = strlen(cmd);
751 if (n >= 4 && !strcasecmp(cmd+n-4, ".exe"))
752 return NULL;
753
754 fd = open(cmd, O_RDONLY);
755 if (fd < 0)
756 return NULL;
757 n = read(fd, buf, sizeof(buf)-1);
758 close(fd);
759 if (n < 4) /* at least '#!/x' and not error */
760 return NULL;
761
762 if (buf[0] != '#' || buf[1] != '!')
763 return NULL;
764 buf[n] = '\0';
765 p = buf + strcspn(buf, "\r\n");
766 if (!*p)
767 return NULL;
768
769 *p = '\0';
770 if (!(p = strrchr(buf+2, '/')) && !(p = strrchr(buf+2, '\\')))
771 return NULL;
772 /* strip options */
773 if ((opt = strchr(p+1, ' ')))
774 *opt = '\0';
775 return p+1;
776 }
777
778 /*
779 * Splits the PATH into parts.
780 */
781 static char **get_path_split(void)
782 {
783 char *p, **path, *envpath = getenv("PATH");
784 int i, n = 0;
785
786 if (!envpath || !*envpath)
787 return NULL;
788
789 envpath = xstrdup(envpath);
790 p = envpath;
791 while (p) {
792 char *dir = p;
793 p = strchr(p, ';');
794 if (p) *p++ = '\0';
795 if (*dir) { /* not earlier, catches series of ; */
796 ++n;
797 }
798 }
799 if (!n)
800 return NULL;
801
802 path = xmalloc((n+1)*sizeof(char *));
803 p = envpath;
804 i = 0;
805 do {
806 if (*p)
807 path[i++] = xstrdup(p);
808 p = p+strlen(p)+1;
809 } while (i < n);
810 path[i] = NULL;
811
812 free(envpath);
813
814 return path;
815 }
816
817 static void free_path_split(char **path)
818 {
819 char **p = path;
820
821 if (!path)
822 return;
823
824 while (*p)
825 free(*p++);
826 free(path);
827 }
828
829 /*
830 * exe_only means that we only want to detect .exe files, but not scripts
831 * (which do not have an extension)
832 */
833 static char *lookup_prog(const char *dir, const char *cmd, int isexe, int exe_only)
834 {
835 char path[MAX_PATH];
836 snprintf(path, sizeof(path), "%s/%s.exe", dir, cmd);
837
838 if (!isexe && access(path, F_OK) == 0)
839 return xstrdup(path);
840 path[strlen(path)-4] = '\0';
841 if ((!exe_only || isexe) && access(path, F_OK) == 0)
842 if (!(GetFileAttributes(path) & FILE_ATTRIBUTE_DIRECTORY))
843 return xstrdup(path);
844 return NULL;
845 }
846
847 /*
848 * Determines the absolute path of cmd using the split path in path.
849 * If cmd contains a slash or backslash, no lookup is performed.
850 */
851 static char *path_lookup(const char *cmd, char **path, int exe_only)
852 {
853 char *prog = NULL;
854 int len = strlen(cmd);
855 int isexe = len >= 4 && !strcasecmp(cmd+len-4, ".exe");
856
857 if (strchr(cmd, '/') || strchr(cmd, '\\'))
858 prog = xstrdup(cmd);
859
860 while (!prog && *path)
861 prog = lookup_prog(*path++, cmd, isexe, exe_only);
862
863 return prog;
864 }
865
866 static int env_compare(const void *a, const void *b)
867 {
868 char *const *ea = a;
869 char *const *eb = b;
870 return strcasecmp(*ea, *eb);
871 }
872
873 static pid_t mingw_spawnve_fd(const char *cmd, const char **argv, char **env,
874 const char *dir,
875 int prepend_cmd, int fhin, int fhout, int fherr)
876 {
877 STARTUPINFO si;
878 PROCESS_INFORMATION pi;
879 struct strbuf envblk, args;
880 unsigned flags;
881 BOOL ret;
882
883 /* Determine whether or not we are associated to a console */
884 HANDLE cons = CreateFile("CONOUT$", GENERIC_WRITE,
885 FILE_SHARE_WRITE, NULL, OPEN_EXISTING,
886 FILE_ATTRIBUTE_NORMAL, NULL);
887 if (cons == INVALID_HANDLE_VALUE) {
888 /* There is no console associated with this process.
889 * Since the child is a console process, Windows
890 * would normally create a console window. But
891 * since we'll be redirecting std streams, we do
892 * not need the console.
893 * It is necessary to use DETACHED_PROCESS
894 * instead of CREATE_NO_WINDOW to make ssh
895 * recognize that it has no console.
896 */
897 flags = DETACHED_PROCESS;
898 } else {
899 /* There is already a console. If we specified
900 * DETACHED_PROCESS here, too, Windows would
901 * disassociate the child from the console.
902 * The same is true for CREATE_NO_WINDOW.
903 * Go figure!
904 */
905 flags = 0;
906 CloseHandle(cons);
907 }
908 memset(&si, 0, sizeof(si));
909 si.cb = sizeof(si);
910 si.dwFlags = STARTF_USESTDHANDLES;
911 si.hStdInput = (HANDLE) _get_osfhandle(fhin);
912 si.hStdOutput = (HANDLE) _get_osfhandle(fhout);
913 si.hStdError = (HANDLE) _get_osfhandle(fherr);
914
915 /* concatenate argv, quoting args as we go */
916 strbuf_init(&args, 0);
917 if (prepend_cmd) {
918 char *quoted = (char *)quote_arg(cmd);
919 strbuf_addstr(&args, quoted);
920 if (quoted != cmd)
921 free(quoted);
922 }
923 for (; *argv; argv++) {
924 char *quoted = (char *)quote_arg(*argv);
925 if (*args.buf)
926 strbuf_addch(&args, ' ');
927 strbuf_addstr(&args, quoted);
928 if (quoted != *argv)
929 free(quoted);
930 }
931
932 if (env) {
933 int count = 0;
934 char **e, **sorted_env;
935
936 for (e = env; *e; e++)
937 count++;
938
939 /* environment must be sorted */
940 sorted_env = xmalloc(sizeof(*sorted_env) * (count + 1));
941 memcpy(sorted_env, env, sizeof(*sorted_env) * (count + 1));
942 qsort(sorted_env, count, sizeof(*sorted_env), env_compare);
943
944 strbuf_init(&envblk, 0);
945 for (e = sorted_env; *e; e++) {
946 strbuf_addstr(&envblk, *e);
947 strbuf_addch(&envblk, '\0');
948 }
949 free(sorted_env);
950 }
951
952 memset(&pi, 0, sizeof(pi));
953 ret = CreateProcess(cmd, args.buf, NULL, NULL, TRUE, flags,
954 env ? envblk.buf : NULL, dir, &si, &pi);
955
956 if (env)
957 strbuf_release(&envblk);
958 strbuf_release(&args);
959
960 if (!ret) {
961 errno = ENOENT;
962 return -1;
963 }
964 CloseHandle(pi.hThread);
965 return (pid_t)pi.hProcess;
966 }
967
968 static pid_t mingw_spawnve(const char *cmd, const char **argv, char **env,
969 int prepend_cmd)
970 {
971 return mingw_spawnve_fd(cmd, argv, env, NULL, prepend_cmd, 0, 1, 2);
972 }
973
974 pid_t mingw_spawnvpe(const char *cmd, const char **argv, char **env,
975 const char *dir,
976 int fhin, int fhout, int fherr)
977 {
978 pid_t pid;
979 char **path = get_path_split();
980 char *prog = path_lookup(cmd, path, 0);
981
982 if (!prog) {
983 errno = ENOENT;
984 pid = -1;
985 }
986 else {
987 const char *interpr = parse_interpreter(prog);
988
989 if (interpr) {
990 const char *argv0 = argv[0];
991 char *iprog = path_lookup(interpr, path, 1);
992 argv[0] = prog;
993 if (!iprog) {
994 errno = ENOENT;
995 pid = -1;
996 }
997 else {
998 pid = mingw_spawnve_fd(iprog, argv, env, dir, 1,
999 fhin, fhout, fherr);
1000 free(iprog);
1001 }
1002 argv[0] = argv0;
1003 }
1004 else
1005 pid = mingw_spawnve_fd(prog, argv, env, dir, 0,
1006 fhin, fhout, fherr);
1007 free(prog);
1008 }
1009 free_path_split(path);
1010 return pid;
1011 }
1012
1013 static int try_shell_exec(const char *cmd, char *const *argv, char **env)
1014 {
1015 const char *interpr = parse_interpreter(cmd);
1016 char **path;
1017 char *prog;
1018 int pid = 0;
1019
1020 if (!interpr)
1021 return 0;
1022 path = get_path_split();
1023 prog = path_lookup(interpr, path, 1);
1024 if (prog) {
1025 int argc = 0;
1026 const char **argv2;
1027 while (argv[argc]) argc++;
1028 argv2 = xmalloc(sizeof(*argv) * (argc+1));
1029 argv2[0] = (char *)cmd; /* full path to the script file */
1030 memcpy(&argv2[1], &argv[1], sizeof(*argv) * argc);
1031 pid = mingw_spawnve(prog, argv2, env, 1);
1032 if (pid >= 0) {
1033 int status;
1034 if (waitpid(pid, &status, 0) < 0)
1035 status = 255;
1036 exit(status);
1037 }
1038 pid = 1; /* indicate that we tried but failed */
1039 free(prog);
1040 free(argv2);
1041 }
1042 free_path_split(path);
1043 return pid;
1044 }
1045
1046 static void mingw_execve(const char *cmd, char *const *argv, char *const *env)
1047 {
1048 /* check if git_command is a shell script */
1049 if (!try_shell_exec(cmd, argv, (char **)env)) {
1050 int pid, status;
1051
1052 pid = mingw_spawnve(cmd, (const char **)argv, (char **)env, 0);
1053 if (pid < 0)
1054 return;
1055 if (waitpid(pid, &status, 0) < 0)
1056 status = 255;
1057 exit(status);
1058 }
1059 }
1060
1061 void mingw_execvp(const char *cmd, char *const *argv)
1062 {
1063 char **path = get_path_split();
1064 char *prog = path_lookup(cmd, path, 0);
1065
1066 if (prog) {
1067 mingw_execve(prog, argv, environ);
1068 free(prog);
1069 } else
1070 errno = ENOENT;
1071
1072 free_path_split(path);
1073 }
1074
1075 static char **copy_environ(void)
1076 {
1077 char **env;
1078 int i = 0;
1079 while (environ[i])
1080 i++;
1081 env = xmalloc((i+1)*sizeof(*env));
1082 for (i = 0; environ[i]; i++)
1083 env[i] = xstrdup(environ[i]);
1084 env[i] = NULL;
1085 return env;
1086 }
1087
1088 void free_environ(char **env)
1089 {
1090 int i;
1091 for (i = 0; env[i]; i++)
1092 free(env[i]);
1093 free(env);
1094 }
1095
1096 static int lookup_env(char **env, const char *name, size_t nmln)
1097 {
1098 int i;
1099
1100 for (i = 0; env[i]; i++) {
1101 if (0 == strncmp(env[i], name, nmln)
1102 && '=' == env[i][nmln])
1103 /* matches */
1104 return i;
1105 }
1106 return -1;
1107 }
1108
1109 /*
1110 * If name contains '=', then sets the variable, otherwise it unsets it
1111 */
1112 static char **env_setenv(char **env, const char *name)
1113 {
1114 char *eq = strchrnul(name, '=');
1115 int i = lookup_env(env, name, eq-name);
1116
1117 if (i < 0) {
1118 if (*eq) {
1119 for (i = 0; env[i]; i++)
1120 ;
1121 env = xrealloc(env, (i+2)*sizeof(*env));
1122 env[i] = xstrdup(name);
1123 env[i+1] = NULL;
1124 }
1125 }
1126 else {
1127 free(env[i]);
1128 if (*eq)
1129 env[i] = xstrdup(name);
1130 else
1131 for (; env[i]; i++)
1132 env[i] = env[i+1];
1133 }
1134 return env;
1135 }
1136
1137 /*
1138 * Copies global environ and adjusts variables as specified by vars.
1139 */
1140 char **make_augmented_environ(const char *const *vars)
1141 {
1142 char **env = copy_environ();
1143
1144 while (*vars)
1145 env = env_setenv(env, *vars++);
1146 return env;
1147 }
1148
1149 /*
1150 * Note, this isn't a complete replacement for getaddrinfo. It assumes
1151 * that service contains a numerical port, or that it it is null. It
1152 * does a simple search using gethostbyname, and returns one IPv4 host
1153 * if one was found.
1154 */
1155 static int WSAAPI getaddrinfo_stub(const char *node, const char *service,
1156 const struct addrinfo *hints,
1157 struct addrinfo **res)
1158 {
1159 struct hostent *h = gethostbyname(node);
1160 struct addrinfo *ai;
1161 struct sockaddr_in *sin;
1162
1163 if (!h)
1164 return WSAGetLastError();
1165
1166 ai = xmalloc(sizeof(struct addrinfo));
1167 *res = ai;
1168 ai->ai_flags = 0;
1169 ai->ai_family = AF_INET;
1170 ai->ai_socktype = hints->ai_socktype;
1171 switch (hints->ai_socktype) {
1172 case SOCK_STREAM:
1173 ai->ai_protocol = IPPROTO_TCP;
1174 break;
1175 case SOCK_DGRAM:
1176 ai->ai_protocol = IPPROTO_UDP;
1177 break;
1178 default:
1179 ai->ai_protocol = 0;
1180 break;
1181 }
1182 ai->ai_addrlen = sizeof(struct sockaddr_in);
1183 ai->ai_canonname = strdup(h->h_name);
1184
1185 sin = xmalloc(ai->ai_addrlen);
1186 memset(sin, 0, ai->ai_addrlen);
1187 sin->sin_family = AF_INET;
1188 if (service)
1189 sin->sin_port = htons(atoi(service));
1190 sin->sin_addr = *(struct in_addr *)h->h_addr;
1191 ai->ai_addr = (struct sockaddr *)sin;
1192 ai->ai_next = 0;
1193 return 0;
1194 }
1195
1196 static void WSAAPI freeaddrinfo_stub(struct addrinfo *res)
1197 {
1198 free(res->ai_canonname);
1199 free(res->ai_addr);
1200 free(res);
1201 }
1202
1203 static int WSAAPI getnameinfo_stub(const struct sockaddr *sa, socklen_t salen,
1204 char *host, DWORD hostlen,
1205 char *serv, DWORD servlen, int flags)
1206 {
1207 const struct sockaddr_in *sin = (const struct sockaddr_in *)sa;
1208 if (sa->sa_family != AF_INET)
1209 return EAI_FAMILY;
1210 if (!host && !serv)
1211 return EAI_NONAME;
1212
1213 if (host && hostlen > 0) {
1214 struct hostent *ent = NULL;
1215 if (!(flags & NI_NUMERICHOST))
1216 ent = gethostbyaddr((const char *)&sin->sin_addr,
1217 sizeof(sin->sin_addr), AF_INET);
1218
1219 if (ent)
1220 snprintf(host, hostlen, "%s", ent->h_name);
1221 else if (flags & NI_NAMEREQD)
1222 return EAI_NONAME;
1223 else
1224 snprintf(host, hostlen, "%s", inet_ntoa(sin->sin_addr));
1225 }
1226
1227 if (serv && servlen > 0) {
1228 struct servent *ent = NULL;
1229 if (!(flags & NI_NUMERICSERV))
1230 ent = getservbyport(sin->sin_port,
1231 flags & NI_DGRAM ? "udp" : "tcp");
1232
1233 if (ent)
1234 snprintf(serv, servlen, "%s", ent->s_name);
1235 else
1236 snprintf(serv, servlen, "%d", ntohs(sin->sin_port));
1237 }
1238
1239 return 0;
1240 }
1241
1242 static HMODULE ipv6_dll = NULL;
1243 static void (WSAAPI *ipv6_freeaddrinfo)(struct addrinfo *res);
1244 static int (WSAAPI *ipv6_getaddrinfo)(const char *node, const char *service,
1245 const struct addrinfo *hints,
1246 struct addrinfo **res);
1247 static int (WSAAPI *ipv6_getnameinfo)(const struct sockaddr *sa, socklen_t salen,
1248 char *host, DWORD hostlen,
1249 char *serv, DWORD servlen, int flags);
1250 /*
1251 * gai_strerror is an inline function in the ws2tcpip.h header, so we
1252 * don't need to try to load that one dynamically.
1253 */
1254
1255 static void socket_cleanup(void)
1256 {
1257 WSACleanup();
1258 if (ipv6_dll)
1259 FreeLibrary(ipv6_dll);
1260 ipv6_dll = NULL;
1261 ipv6_freeaddrinfo = freeaddrinfo_stub;
1262 ipv6_getaddrinfo = getaddrinfo_stub;
1263 ipv6_getnameinfo = getnameinfo_stub;
1264 }
1265
1266 static void ensure_socket_initialization(void)
1267 {
1268 WSADATA wsa;
1269 static int initialized = 0;
1270 const char *libraries[] = { "ws2_32.dll", "wship6.dll", NULL };
1271 const char **name;
1272
1273 if (initialized)
1274 return;
1275
1276 if (WSAStartup(MAKEWORD(2,2), &wsa))
1277 die("unable to initialize winsock subsystem, error %d",
1278 WSAGetLastError());
1279
1280 for (name = libraries; *name; name++) {
1281 ipv6_dll = LoadLibrary(*name);
1282 if (!ipv6_dll)
1283 continue;
1284
1285 ipv6_freeaddrinfo = (void (WSAAPI *)(struct addrinfo *))
1286 GetProcAddress(ipv6_dll, "freeaddrinfo");
1287 ipv6_getaddrinfo = (int (WSAAPI *)(const char *, const char *,
1288 const struct addrinfo *,
1289 struct addrinfo **))
1290 GetProcAddress(ipv6_dll, "getaddrinfo");
1291 ipv6_getnameinfo = (int (WSAAPI *)(const struct sockaddr *,
1292 socklen_t, char *, DWORD,
1293 char *, DWORD, int))
1294 GetProcAddress(ipv6_dll, "getnameinfo");
1295 if (!ipv6_freeaddrinfo || !ipv6_getaddrinfo || !ipv6_getnameinfo) {
1296 FreeLibrary(ipv6_dll);
1297 ipv6_dll = NULL;
1298 } else
1299 break;
1300 }
1301 if (!ipv6_freeaddrinfo || !ipv6_getaddrinfo || !ipv6_getnameinfo) {
1302 ipv6_freeaddrinfo = freeaddrinfo_stub;
1303 ipv6_getaddrinfo = getaddrinfo_stub;
1304 ipv6_getnameinfo = getnameinfo_stub;
1305 }
1306
1307 atexit(socket_cleanup);
1308 initialized = 1;
1309 }
1310
1311 #undef gethostbyname
1312 struct hostent *mingw_gethostbyname(const char *host)
1313 {
1314 ensure_socket_initialization();
1315 return gethostbyname(host);
1316 }
1317
1318 void mingw_freeaddrinfo(struct addrinfo *res)
1319 {
1320 ipv6_freeaddrinfo(res);
1321 }
1322
1323 int mingw_getaddrinfo(const char *node, const char *service,
1324 const struct addrinfo *hints, struct addrinfo **res)
1325 {
1326 ensure_socket_initialization();
1327 return ipv6_getaddrinfo(node, service, hints, res);
1328 }
1329
1330 int mingw_getnameinfo(const struct sockaddr *sa, socklen_t salen,
1331 char *host, DWORD hostlen, char *serv, DWORD servlen,
1332 int flags)
1333 {
1334 ensure_socket_initialization();
1335 return ipv6_getnameinfo(sa, salen, host, hostlen, serv, servlen, flags);
1336 }
1337
1338 int mingw_socket(int domain, int type, int protocol)
1339 {
1340 int sockfd;
1341 SOCKET s = WSASocket(domain, type, protocol, NULL, 0, 0);
1342 if (s == INVALID_SOCKET) {
1343 /*
1344 * WSAGetLastError() values are regular BSD error codes
1345 * biased by WSABASEERR.
1346 * However, strerror() does not know about networking
1347 * specific errors, which are values beginning at 38 or so.
1348 * Therefore, we choose to leave the biased error code
1349 * in errno so that _if_ someone looks up the code somewhere,
1350 * then it is at least the number that are usually listed.
1351 */
1352 errno = WSAGetLastError();
1353 return -1;
1354 }
1355 /* convert into a file descriptor */
1356 if ((sockfd = _open_osfhandle(s, O_RDWR|O_BINARY)) < 0) {
1357 closesocket(s);
1358 return error("unable to make a socket file descriptor: %s",
1359 strerror(errno));
1360 }
1361 return sockfd;
1362 }
1363
1364 #undef connect
1365 int mingw_connect(int sockfd, struct sockaddr *sa, size_t sz)
1366 {
1367 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
1368 return connect(s, sa, sz);
1369 }
1370
1371 #undef rename
1372 int mingw_rename(const char *pold, const char *pnew)
1373 {
1374 DWORD attrs, gle;
1375 int tries = 0;
1376
1377 /*
1378 * Try native rename() first to get errno right.
1379 * It is based on MoveFile(), which cannot overwrite existing files.
1380 */
1381 if (!rename(pold, pnew))
1382 return 0;
1383 if (errno != EEXIST)
1384 return -1;
1385 repeat:
1386 if (MoveFileEx(pold, pnew, MOVEFILE_REPLACE_EXISTING))
1387 return 0;
1388 /* TODO: translate more errors */
1389 gle = GetLastError();
1390 if (gle == ERROR_ACCESS_DENIED &&
1391 (attrs = GetFileAttributes(pnew)) != INVALID_FILE_ATTRIBUTES) {
1392 if (attrs & FILE_ATTRIBUTE_DIRECTORY) {
1393 errno = EISDIR;
1394 return -1;
1395 }
1396 if ((attrs & FILE_ATTRIBUTE_READONLY) &&
1397 SetFileAttributes(pnew, attrs & ~FILE_ATTRIBUTE_READONLY)) {
1398 if (MoveFileEx(pold, pnew, MOVEFILE_REPLACE_EXISTING))
1399 return 0;
1400 gle = GetLastError();
1401 /* revert file attributes on failure */
1402 SetFileAttributes(pnew, attrs);
1403 }
1404 }
1405 if (tries < ARRAY_SIZE(delay) && gle == ERROR_ACCESS_DENIED) {
1406 /*
1407 * We assume that some other process had the source or
1408 * destination file open at the wrong moment and retry.
1409 * In order to give the other process a higher chance to
1410 * complete its operation, we give up our time slice now.
1411 * If we have to retry again, we do sleep a bit.
1412 */
1413 Sleep(delay[tries]);
1414 tries++;
1415 goto repeat;
1416 }
1417 if (gle == ERROR_ACCESS_DENIED &&
1418 ask_user_yes_no("Rename from '%s' to '%s' failed. "
1419 "Should I try again?", pold, pnew))
1420 goto repeat;
1421
1422 errno = EACCES;
1423 return -1;
1424 }
1425
1426 /*
1427 * Note that this doesn't return the actual pagesize, but
1428 * the allocation granularity. If future Windows specific git code
1429 * needs the real getpagesize function, we need to find another solution.
1430 */
1431 int mingw_getpagesize(void)
1432 {
1433 SYSTEM_INFO si;
1434 GetSystemInfo(&si);
1435 return si.dwAllocationGranularity;
1436 }
1437
1438 struct passwd *getpwuid(int uid)
1439 {
1440 static char user_name[100];
1441 static struct passwd p;
1442
1443 DWORD len = sizeof(user_name);
1444 if (!GetUserName(user_name, &len))
1445 return NULL;
1446 p.pw_name = user_name;
1447 p.pw_gecos = "unknown";
1448 p.pw_dir = NULL;
1449 return &p;
1450 }
1451
1452 static HANDLE timer_event;
1453 static HANDLE timer_thread;
1454 static int timer_interval;
1455 static int one_shot;
1456 static sig_handler_t timer_fn = SIG_DFL;
1457
1458 /* The timer works like this:
1459 * The thread, ticktack(), is a trivial routine that most of the time
1460 * only waits to receive the signal to terminate. The main thread tells
1461 * the thread to terminate by setting the timer_event to the signalled
1462 * state.
1463 * But ticktack() interrupts the wait state after the timer's interval
1464 * length to call the signal handler.
1465 */
1466
1467 static unsigned __stdcall ticktack(void *dummy)
1468 {
1469 while (WaitForSingleObject(timer_event, timer_interval) == WAIT_TIMEOUT) {
1470 if (timer_fn == SIG_DFL)
1471 die("Alarm");
1472 if (timer_fn != SIG_IGN)
1473 timer_fn(SIGALRM);
1474 if (one_shot)
1475 break;
1476 }
1477 return 0;
1478 }
1479
1480 static int start_timer_thread(void)
1481 {
1482 timer_event = CreateEvent(NULL, FALSE, FALSE, NULL);
1483 if (timer_event) {
1484 timer_thread = (HANDLE) _beginthreadex(NULL, 0, ticktack, NULL, 0, NULL);
1485 if (!timer_thread )
1486 return errno = ENOMEM,
1487 error("cannot start timer thread");
1488 } else
1489 return errno = ENOMEM,
1490 error("cannot allocate resources for timer");
1491 return 0;
1492 }
1493
1494 static void stop_timer_thread(void)
1495 {
1496 if (timer_event)
1497 SetEvent(timer_event); /* tell thread to terminate */
1498 if (timer_thread) {
1499 int rc = WaitForSingleObject(timer_thread, 1000);
1500 if (rc == WAIT_TIMEOUT)
1501 error("timer thread did not terminate timely");
1502 else if (rc != WAIT_OBJECT_0)
1503 error("waiting for timer thread failed: %lu",
1504 GetLastError());
1505 CloseHandle(timer_thread);
1506 }
1507 if (timer_event)
1508 CloseHandle(timer_event);
1509 timer_event = NULL;
1510 timer_thread = NULL;
1511 }
1512
1513 static inline int is_timeval_eq(const struct timeval *i1, const struct timeval *i2)
1514 {
1515 return i1->tv_sec == i2->tv_sec && i1->tv_usec == i2->tv_usec;
1516 }
1517
1518 int setitimer(int type, struct itimerval *in, struct itimerval *out)
1519 {
1520 static const struct timeval zero;
1521 static int atexit_done;
1522
1523 if (out != NULL)
1524 return errno = EINVAL,
1525 error("setitimer param 3 != NULL not implemented");
1526 if (!is_timeval_eq(&in->it_interval, &zero) &&
1527 !is_timeval_eq(&in->it_interval, &in->it_value))
1528 return errno = EINVAL,
1529 error("setitimer: it_interval must be zero or eq it_value");
1530
1531 if (timer_thread)
1532 stop_timer_thread();
1533
1534 if (is_timeval_eq(&in->it_value, &zero) &&
1535 is_timeval_eq(&in->it_interval, &zero))
1536 return 0;
1537
1538 timer_interval = in->it_value.tv_sec * 1000 + in->it_value.tv_usec / 1000;
1539 one_shot = is_timeval_eq(&in->it_interval, &zero);
1540 if (!atexit_done) {
1541 atexit(stop_timer_thread);
1542 atexit_done = 1;
1543 }
1544 return start_timer_thread();
1545 }
1546
1547 int sigaction(int sig, struct sigaction *in, struct sigaction *out)
1548 {
1549 if (sig != SIGALRM)
1550 return errno = EINVAL,
1551 error("sigaction only implemented for SIGALRM");
1552 if (out != NULL)
1553 return errno = EINVAL,
1554 error("sigaction: param 3 != NULL not implemented");
1555
1556 timer_fn = in->sa_handler;
1557 return 0;
1558 }
1559
1560 #undef signal
1561 sig_handler_t mingw_signal(int sig, sig_handler_t handler)
1562 {
1563 sig_handler_t old = timer_fn;
1564 if (sig != SIGALRM)
1565 return signal(sig, handler);
1566 timer_fn = handler;
1567 return old;
1568 }
1569
1570 static const char *make_backslash_path(const char *path)
1571 {
1572 static char buf[PATH_MAX + 1];
1573 char *c;
1574
1575 if (strlcpy(buf, path, PATH_MAX) >= PATH_MAX)
1576 die("Too long path: %.*s", 60, path);
1577
1578 for (c = buf; *c; c++) {
1579 if (*c == '/')
1580 *c = '\\';
1581 }
1582 return buf;
1583 }
1584
1585 void mingw_open_html(const char *unixpath)
1586 {
1587 const char *htmlpath = make_backslash_path(unixpath);
1588 typedef HINSTANCE (WINAPI *T)(HWND, const char *,
1589 const char *, const char *, const char *, INT);
1590 T ShellExecute;
1591 HMODULE shell32;
1592 int r;
1593
1594 shell32 = LoadLibrary("shell32.dll");
1595 if (!shell32)
1596 die("cannot load shell32.dll");
1597 ShellExecute = (T)GetProcAddress(shell32, "ShellExecuteA");
1598 if (!ShellExecute)
1599 die("cannot run browser");
1600
1601 printf("Launching default browser to display HTML ...\n");
1602 r = (int)ShellExecute(NULL, "open", htmlpath, NULL, "\\", SW_SHOWNORMAL);
1603 FreeLibrary(shell32);
1604 /* see the MSDN documentation referring to the result codes here */
1605 if (r <= 32) {
1606 die("failed to launch browser for %.*s", MAX_PATH, unixpath);
1607 }
1608 }
1609
1610 int link(const char *oldpath, const char *newpath)
1611 {
1612 typedef BOOL (WINAPI *T)(const char*, const char*, LPSECURITY_ATTRIBUTES);
1613 static T create_hard_link = NULL;
1614 if (!create_hard_link) {
1615 create_hard_link = (T) GetProcAddress(
1616 GetModuleHandle("kernel32.dll"), "CreateHardLinkA");
1617 if (!create_hard_link)
1618 create_hard_link = (T)-1;
1619 }
1620 if (create_hard_link == (T)-1) {
1621 errno = ENOSYS;
1622 return -1;
1623 }
1624 if (!create_hard_link(newpath, oldpath, NULL)) {
1625 errno = err_win_to_posix(GetLastError());
1626 return -1;
1627 }
1628 return 0;
1629 }
1630
1631 char *getpass(const char *prompt)
1632 {
1633 struct strbuf buf = STRBUF_INIT;
1634
1635 fputs(prompt, stderr);
1636 for (;;) {
1637 char c = _getch();
1638 if (c == '\r' || c == '\n')
1639 break;
1640 strbuf_addch(&buf, c);
1641 }
1642 fputs("\n", stderr);
1643 return strbuf_detach(&buf, NULL);
1644 }
1645
1646 #ifndef NO_MINGW_REPLACE_READDIR
1647 /* MinGW readdir implementation to avoid extra lstats for Git */
1648 struct mingw_DIR
1649 {
1650 struct _finddata_t dd_dta; /* disk transfer area for this dir */
1651 struct mingw_dirent dd_dir; /* Our own implementation, including d_type */
1652 long dd_handle; /* _findnext handle */
1653 int dd_stat; /* 0 = next entry to read is first entry, -1 = off the end, positive = 0 based index of next entry */
1654 char dd_name[1]; /* given path for dir with search pattern (struct is extended) */
1655 };
1656
1657 struct dirent *mingw_readdir(DIR *dir)
1658 {
1659 WIN32_FIND_DATAA buf;
1660 HANDLE handle;
1661 struct mingw_DIR *mdir = (struct mingw_DIR*)dir;
1662
1663 if (!dir->dd_handle) {
1664 errno = EBADF; /* No set_errno for mingw */
1665 return NULL;
1666 }
1667
1668 if (dir->dd_handle == (long)INVALID_HANDLE_VALUE && dir->dd_stat == 0)
1669 {
1670 DWORD lasterr;
1671 handle = FindFirstFileA(dir->dd_name, &buf);
1672 lasterr = GetLastError();
1673 dir->dd_handle = (long)handle;
1674 if (handle == INVALID_HANDLE_VALUE && (lasterr != ERROR_NO_MORE_FILES)) {
1675 errno = err_win_to_posix(lasterr);
1676 return NULL;
1677 }
1678 } else if (dir->dd_handle == (long)INVALID_HANDLE_VALUE) {
1679 return NULL;
1680 } else if (!FindNextFileA((HANDLE)dir->dd_handle, &buf)) {
1681 DWORD lasterr = GetLastError();
1682 FindClose((HANDLE)dir->dd_handle);
1683 dir->dd_handle = (long)INVALID_HANDLE_VALUE;
1684 /* POSIX says you shouldn't set errno when readdir can't
1685 find any more files; so, if another error we leave it set. */
1686 if (lasterr != ERROR_NO_MORE_FILES)
1687 errno = err_win_to_posix(lasterr);
1688 return NULL;
1689 }
1690
1691 /* We get here if `buf' contains valid data. */
1692 strcpy(dir->dd_dir.d_name, buf.cFileName);
1693 ++dir->dd_stat;
1694
1695 /* Set file type, based on WIN32_FIND_DATA */
1696 mdir->dd_dir.d_type = 0;
1697 if (buf.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)
1698 mdir->dd_dir.d_type |= DT_DIR;
1699 else
1700 mdir->dd_dir.d_type |= DT_REG;
1701
1702 return (struct dirent*)&dir->dd_dir;
1703 }
1704 #endif // !NO_MINGW_REPLACE_READDIR
The MinGW fork, forked for msysGit