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mingw: Don't ask the user yes/no questions if they can't see the question.
[git/dscho.git] / compat / mingw.c
blob62e7ba11ced65dab6fbedc86fd00a385f171c9f3
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)) || !isatty(_fileno(stderr)))
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 write
297 ssize_t mingw_write(int fd, const void *buf, size_t count)
298 {
299 /*
300 * While write() calls to a file on a local disk are translated
301 * into WriteFile() calls with a maximum size of 64KB on Windows
302 * XP and 256KB on Vista, no such cap is placed on writes to
303 * files over the network on Windows XP. Unfortunately, there
304 * seems to be a limit of 32MB-28KB on X64 and 64MB-32KB on x86;
305 * bigger writes fail on Windows XP.
306 * So we cap to a nice 31MB here to avoid write failures over
307 * the net without changing the number of WriteFile() calls in
308 * the local case.
309 */
310 return write(fd, buf, min(count, 31 * 1024 * 1024));
311 }
312
313 #undef fopen
314 FILE *mingw_fopen (const char *filename, const char *otype)
315 {
316 int hide = 0;
317 FILE *file;
318 if (hide_dotfiles == HIDE_DOTFILES_TRUE &&
319 basename((char*)filename)[0] == '.')
320 hide = access(filename, F_OK);
321 if (!strcmp(filename, "/dev/null"))
322 filename = "nul";
323 file = fopen(filename, otype);
324 if (file && hide && make_hidden(filename))
325 warning("Could not mark '%s' as hidden.", filename);
326 return file;
327 }
328
329 #undef freopen
330 FILE *mingw_freopen (const char *filename, const char *otype, FILE *stream)
331 {
332 int hide = 0;
333 FILE *file;
334 if (hide_dotfiles == HIDE_DOTFILES_TRUE &&
335 basename((char*)filename)[0] == '.')
336 hide = access(filename, F_OK);
337 if (filename && !strcmp(filename, "/dev/null"))
338 filename = "nul";
339 file = freopen(filename, otype, stream);
340 if (file && hide && make_hidden(filename))
341 warning("Could not mark '%s' as hidden.", filename);
342 return file;
343 }
344
345 /*
346 * The unit of FILETIME is 100-nanoseconds since January 1, 1601, UTC.
347 * Returns the 100-nanoseconds ("hekto nanoseconds") since the epoch.
348 */
349 static inline long long filetime_to_hnsec(const FILETIME *ft)
350 {
351 long long winTime = ((long long)ft->dwHighDateTime << 32) + ft->dwLowDateTime;
352 /* Windows to Unix Epoch conversion */
353 return winTime - 116444736000000000LL;
354 }
355
356 static inline time_t filetime_to_time_t(const FILETIME *ft)
357 {
358 return (time_t)(filetime_to_hnsec(ft) / 10000000);
359 }
360
361 /* We keep the do_lstat code in a separate function to avoid recursion.
362 * When a path ends with a slash, the stat will fail with ENOENT. In
363 * this case, we strip the trailing slashes and stat again.
364 *
365 * If follow is true then act like stat() and report on the link
366 * target. Otherwise report on the link itself.
367 */
368 static int do_lstat(int follow, const char *file_name, struct stat *buf)
369 {
370 WIN32_FILE_ATTRIBUTE_DATA fdata;
371
372 if (!(errno = get_file_attr(file_name, &fdata))) {
373 buf->st_ino = 0;
374 buf->st_gid = 0;
375 buf->st_uid = 0;
376 buf->st_nlink = 1;
377 buf->st_mode = file_attr_to_st_mode(fdata.dwFileAttributes);
378 buf->st_size = fdata.nFileSizeLow |
379 (((off_t)fdata.nFileSizeHigh)<<32);
380 buf->st_dev = buf->st_rdev = 0; /* not used by Git */
381 buf->st_atime = filetime_to_time_t(&(fdata.ftLastAccessTime));
382 buf->st_mtime = filetime_to_time_t(&(fdata.ftLastWriteTime));
383 buf->st_ctime = filetime_to_time_t(&(fdata.ftCreationTime));
384 if (fdata.dwFileAttributes & FILE_ATTRIBUTE_REPARSE_POINT) {
385 WIN32_FIND_DATAA findbuf;
386 HANDLE handle = FindFirstFileA(file_name, &findbuf);
387 if (handle != INVALID_HANDLE_VALUE) {
388 if ((findbuf.dwFileAttributes & FILE_ATTRIBUTE_REPARSE_POINT) &&
389 (findbuf.dwReserved0 == IO_REPARSE_TAG_SYMLINK)) {
390 if (follow) {
391 char buffer[MAXIMUM_REPARSE_DATA_BUFFER_SIZE];
392 buf->st_size = readlink(file_name, buffer, MAXIMUM_REPARSE_DATA_BUFFER_SIZE);
393 } else {
394 buf->st_mode = S_IFLNK;
395 }
396 buf->st_mode |= S_IREAD;
397 if (!(findbuf.dwFileAttributes & FILE_ATTRIBUTE_READONLY))
398 buf->st_mode |= S_IWRITE;
399 }
400 FindClose(handle);
401 }
402 }
403 return 0;
404 }
405 return -1;
406 }
407
408 /* We provide our own lstat/fstat functions, since the provided
409 * lstat/fstat functions are so slow. These stat functions are
410 * tailored for Git's usage (read: fast), and are not meant to be
411 * complete. Note that Git stat()s are redirected to mingw_lstat()
412 * too, since Windows doesn't really handle symlinks that well.
413 */
414 static int do_stat_internal(int follow, const char *file_name, struct stat *buf)
415 {
416 int namelen;
417 static char alt_name[PATH_MAX];
418
419 if (!do_lstat(follow, file_name, buf))
420 return 0;
421
422 /* if file_name ended in a '/', Windows returned ENOENT;
423 * try again without trailing slashes
424 */
425 if (errno != ENOENT)
426 return -1;
427
428 namelen = strlen(file_name);
429 if (namelen && file_name[namelen-1] != '/')
430 return -1;
431 while (namelen && file_name[namelen-1] == '/')
432 --namelen;
433 if (!namelen || namelen >= PATH_MAX)
434 return -1;
435
436 memcpy(alt_name, file_name, namelen);
437 alt_name[namelen] = 0;
438 return do_lstat(follow, alt_name, buf);
439 }
440
441 int mingw_lstat(const char *file_name, struct stat *buf)
442 {
443 return do_stat_internal(0, file_name, buf);
444 }
445 int mingw_stat(const char *file_name, struct stat *buf)
446 {
447 return do_stat_internal(1, file_name, buf);
448 }
449
450 #undef fstat
451 int mingw_fstat(int fd, struct stat *buf)
452 {
453 HANDLE fh = (HANDLE)_get_osfhandle(fd);
454 BY_HANDLE_FILE_INFORMATION fdata;
455
456 if (fh == INVALID_HANDLE_VALUE) {
457 errno = EBADF;
458 return -1;
459 }
460 /* direct non-file handles to MS's fstat() */
461 if (GetFileType(fh) != FILE_TYPE_DISK)
462 return _fstati64(fd, buf);
463
464 if (GetFileInformationByHandle(fh, &fdata)) {
465 buf->st_ino = 0;
466 buf->st_gid = 0;
467 buf->st_uid = 0;
468 buf->st_nlink = 1;
469 buf->st_mode = file_attr_to_st_mode(fdata.dwFileAttributes);
470 buf->st_size = fdata.nFileSizeLow |
471 (((off_t)fdata.nFileSizeHigh)<<32);
472 buf->st_dev = buf->st_rdev = 0; /* not used by Git */
473 buf->st_atime = filetime_to_time_t(&(fdata.ftLastAccessTime));
474 buf->st_mtime = filetime_to_time_t(&(fdata.ftLastWriteTime));
475 buf->st_ctime = filetime_to_time_t(&(fdata.ftCreationTime));
476 return 0;
477 }
478 errno = EBADF;
479 return -1;
480 }
481
482 static inline void time_t_to_filetime(time_t t, FILETIME *ft)
483 {
484 long long winTime = t * 10000000LL + 116444736000000000LL;
485 ft->dwLowDateTime = winTime;
486 ft->dwHighDateTime = winTime >> 32;
487 }
488
489 int mingw_utime (const char *file_name, const struct utimbuf *times)
490 {
491 FILETIME mft, aft;
492 int fh, rc;
493
494 /* must have write permission */
495 DWORD attrs = GetFileAttributes(file_name);
496 if (attrs != INVALID_FILE_ATTRIBUTES &&
497 (attrs & FILE_ATTRIBUTE_READONLY)) {
498 /* ignore errors here; open() will report them */
499 SetFileAttributes(file_name, attrs & ~FILE_ATTRIBUTE_READONLY);
500 }
501
502 if ((fh = open(file_name, O_RDWR | O_BINARY)) < 0) {
503 rc = -1;
504 goto revert_attrs;
505 }
506
507 if (times) {
508 time_t_to_filetime(times->modtime, &mft);
509 time_t_to_filetime(times->actime, &aft);
510 } else {
511 GetSystemTimeAsFileTime(&mft);
512 aft = mft;
513 }
514 if (!SetFileTime((HANDLE)_get_osfhandle(fh), NULL, &aft, &mft)) {
515 errno = EINVAL;
516 rc = -1;
517 } else
518 rc = 0;
519 close(fh);
520
521 revert_attrs:
522 if (attrs != INVALID_FILE_ATTRIBUTES &&
523 (attrs & FILE_ATTRIBUTE_READONLY)) {
524 /* ignore errors again */
525 SetFileAttributes(file_name, attrs);
526 }
527 return rc;
528 }
529
530 unsigned int sleep (unsigned int seconds)
531 {
532 Sleep(seconds*1000);
533 return 0;
534 }
535
536 int mkstemp(char *template)
537 {
538 char *filename = mktemp(template);
539 if (filename == NULL)
540 return -1;
541 return open(filename, O_RDWR | O_CREAT, 0600);
542 }
543
544 int gettimeofday(struct timeval *tv, void *tz)
545 {
546 FILETIME ft;
547 long long hnsec;
548
549 GetSystemTimeAsFileTime(&ft);
550 hnsec = filetime_to_hnsec(&ft);
551 tv->tv_sec = hnsec / 10000000;
552 tv->tv_usec = (hnsec % 10000000) / 10;
553 return 0;
554 }
555
556 int pipe(int filedes[2])
557 {
558 HANDLE h[2];
559
560 /* this creates non-inheritable handles */
561 if (!CreatePipe(&h[0], &h[1], NULL, 8192)) {
562 errno = err_win_to_posix(GetLastError());
563 return -1;
564 }
565 filedes[0] = _open_osfhandle((int)h[0], O_NOINHERIT);
566 if (filedes[0] < 0) {
567 CloseHandle(h[0]);
568 CloseHandle(h[1]);
569 return -1;
570 }
571 filedes[1] = _open_osfhandle((int)h[1], O_NOINHERIT);
572 if (filedes[0] < 0) {
573 close(filedes[0]);
574 CloseHandle(h[1]);
575 return -1;
576 }
577 return 0;
578 }
579
580 int poll(struct pollfd *ufds, unsigned int nfds, int timeout)
581 {
582 int i, pending;
583
584 if (timeout >= 0) {
585 if (nfds == 0) {
586 Sleep(timeout);
587 return 0;
588 }
589 return errno = EINVAL, error("poll timeout not supported");
590 }
591
592 /* When there is only one fd to wait for, then we pretend that
593 * input is available and let the actual wait happen when the
594 * caller invokes read().
595 */
596 if (nfds == 1) {
597 if (!(ufds[0].events & POLLIN))
598 return errno = EINVAL, error("POLLIN not set");
599 ufds[0].revents = POLLIN;
600 return 0;
601 }
602
603 repeat:
604 pending = 0;
605 for (i = 0; i < nfds; i++) {
606 DWORD avail = 0;
607 HANDLE h = (HANDLE) _get_osfhandle(ufds[i].fd);
608 if (h == INVALID_HANDLE_VALUE)
609 return -1; /* errno was set */
610
611 if (!(ufds[i].events & POLLIN))
612 return errno = EINVAL, error("POLLIN not set");
613
614 /* this emulation works only for pipes */
615 if (!PeekNamedPipe(h, NULL, 0, NULL, &avail, NULL)) {
616 int err = GetLastError();
617 if (err == ERROR_BROKEN_PIPE) {
618 ufds[i].revents = POLLHUP;
619 pending++;
620 } else {
621 errno = EINVAL;
622 return error("PeekNamedPipe failed,"
623 " GetLastError: %u", err);
624 }
625 } else if (avail) {
626 ufds[i].revents = POLLIN;
627 pending++;
628 } else
629 ufds[i].revents = 0;
630 }
631 if (!pending) {
632 /* The only times that we spin here is when the process
633 * that is connected through the pipes is waiting for
634 * its own input data to become available. But since
635 * the process (pack-objects) is itself CPU intensive,
636 * it will happily pick up the time slice that we are
637 * relinquishing here.
638 */
639 Sleep(0);
640 goto repeat;
641 }
642 return 0;
643 }
644
645 struct tm *gmtime_r(const time_t *timep, struct tm *result)
646 {
647 /* gmtime() in MSVCRT.DLL is thread-safe, but not reentrant */
648 memcpy(result, gmtime(timep), sizeof(struct tm));
649 return result;
650 }
651
652 struct tm *localtime_r(const time_t *timep, struct tm *result)
653 {
654 /* localtime() in MSVCRT.DLL is thread-safe, but not reentrant */
655 memcpy(result, localtime(timep), sizeof(struct tm));
656 return result;
657 }
658
659 #undef getcwd
660 char *mingw_getcwd(char *pointer, int len)
661 {
662 int i;
663 char *ret = getcwd(pointer, len);
664 if (!ret)
665 return ret;
666 for (i = 0; pointer[i]; i++)
667 if (pointer[i] == '\\')
668 pointer[i] = '/';
669 return ret;
670 }
671
672 #undef getenv
673 char *mingw_getenv(const char *name)
674 {
675 char *result = getenv(name);
676 if (!result && !strcmp(name, "TMPDIR")) {
677 /* on Windows it is TMP and TEMP */
678 result = getenv("TMP");
679 if (!result)
680 result = getenv("TEMP");
681 }
682 return result;
683 }
684
685 /*
686 * See http://msdn2.microsoft.com/en-us/library/17w5ykft(vs.71).aspx
687 * (Parsing C++ Command-Line Arguments)
688 */
689 static const char *quote_arg(const char *arg)
690 {
691 /* count chars to quote */
692 int len = 0, n = 0;
693 int force_quotes = 0;
694 char *q, *d;
695 const char *p = arg;
696 if (!*p) force_quotes = 1;
697 while (*p) {
698 if (isspace(*p) || *p == '*' || *p == '?' || *p == '{' || *p == '\'')
699 force_quotes = 1;
700 else if (*p == '"')
701 n++;
702 else if (*p == '\\') {
703 int count = 0;
704 while (*p == '\\') {
705 count++;
706 p++;
707 len++;
708 }
709 if (*p == '"')
710 n += count*2 + 1;
711 continue;
712 }
713 len++;
714 p++;
715 }
716 if (!force_quotes && n == 0)
717 return arg;
718
719 /* insert \ where necessary */
720 d = q = xmalloc(len+n+3);
721 *d++ = '"';
722 while (*arg) {
723 if (*arg == '"')
724 *d++ = '\\';
725 else if (*arg == '\\') {
726 int count = 0;
727 while (*arg == '\\') {
728 count++;
729 *d++ = *arg++;
730 }
731 if (*arg == '"') {
732 while (count-- > 0)
733 *d++ = '\\';
734 *d++ = '\\';
735 }
736 }
737 *d++ = *arg++;
738 }
739 *d++ = '"';
740 *d++ = 0;
741 return q;
742 }
743
744 static const char *parse_interpreter(const char *cmd)
745 {
746 static char buf[100];
747 char *p, *opt;
748 int n, fd;
749
750 /* don't even try a .exe */
751 n = strlen(cmd);
752 if (n >= 4 && !strcasecmp(cmd+n-4, ".exe"))
753 return NULL;
754
755 fd = open(cmd, O_RDONLY);
756 if (fd < 0)
757 return NULL;
758 n = read(fd, buf, sizeof(buf)-1);
759 close(fd);
760 if (n < 4) /* at least '#!/x' and not error */
761 return NULL;
762
763 if (buf[0] != '#' || buf[1] != '!')
764 return NULL;
765 buf[n] = '\0';
766 p = buf + strcspn(buf, "\r\n");
767 if (!*p)
768 return NULL;
769
770 *p = '\0';
771 if (!(p = strrchr(buf+2, '/')) && !(p = strrchr(buf+2, '\\')))
772 return NULL;
773 /* strip options */
774 if ((opt = strchr(p+1, ' ')))
775 *opt = '\0';
776 return p+1;
777 }
778
779 /*
780 * Splits the PATH into parts.
781 */
782 static char **get_path_split(void)
783 {
784 char *p, **path, *envpath = getenv("PATH");
785 int i, n = 0;
786
787 if (!envpath || !*envpath)
788 return NULL;
789
790 envpath = xstrdup(envpath);
791 p = envpath;
792 while (p) {
793 char *dir = p;
794 p = strchr(p, ';');
795 if (p) *p++ = '\0';
796 if (*dir) { /* not earlier, catches series of ; */
797 ++n;
798 }
799 }
800 if (!n)
801 return NULL;
802
803 path = xmalloc((n+1)*sizeof(char *));
804 p = envpath;
805 i = 0;
806 do {
807 if (*p)
808 path[i++] = xstrdup(p);
809 p = p+strlen(p)+1;
810 } while (i < n);
811 path[i] = NULL;
812
813 free(envpath);
814
815 return path;
816 }
817
818 static void free_path_split(char **path)
819 {
820 char **p = path;
821
822 if (!path)
823 return;
824
825 while (*p)
826 free(*p++);
827 free(path);
828 }
829
830 /*
831 * exe_only means that we only want to detect .exe files, but not scripts
832 * (which do not have an extension)
833 */
834 static char *lookup_prog(const char *dir, const char *cmd, int isexe, int exe_only)
835 {
836 char path[MAX_PATH];
837 snprintf(path, sizeof(path), "%s/%s.exe", dir, cmd);
838
839 if (!isexe && access(path, F_OK) == 0)
840 return xstrdup(path);
841 path[strlen(path)-4] = '\0';
842 if ((!exe_only || isexe) && access(path, F_OK) == 0)
843 if (!(GetFileAttributes(path) & FILE_ATTRIBUTE_DIRECTORY))
844 return xstrdup(path);
845 return NULL;
846 }
847
848 /*
849 * Determines the absolute path of cmd using the split path in path.
850 * If cmd contains a slash or backslash, no lookup is performed.
851 */
852 static char *path_lookup(const char *cmd, char **path, int exe_only)
853 {
854 char *prog = NULL;
855 int len = strlen(cmd);
856 int isexe = len >= 4 && !strcasecmp(cmd+len-4, ".exe");
857
858 if (strchr(cmd, '/') || strchr(cmd, '\\'))
859 prog = xstrdup(cmd);
860
861 while (!prog && *path)
862 prog = lookup_prog(*path++, cmd, isexe, exe_only);
863
864 return prog;
865 }
866
867 static int env_compare(const void *a, const void *b)
868 {
869 char *const *ea = a;
870 char *const *eb = b;
871 return strcasecmp(*ea, *eb);
872 }
873
874 static pid_t mingw_spawnve_fd(const char *cmd, const char **argv, char **env,
875 const char *dir,
876 int prepend_cmd, int fhin, int fhout, int fherr)
877 {
878 STARTUPINFO si;
879 PROCESS_INFORMATION pi;
880 struct strbuf envblk, args;
881 unsigned flags;
882 BOOL ret;
883
884 /* Determine whether or not we are associated to a console */
885 HANDLE cons = CreateFile("CONOUT$", GENERIC_WRITE,
886 FILE_SHARE_WRITE, NULL, OPEN_EXISTING,
887 FILE_ATTRIBUTE_NORMAL, NULL);
888 if (cons == INVALID_HANDLE_VALUE) {
889 /* There is no console associated with this process.
890 * Since the child is a console process, Windows
891 * would normally create a console window. But
892 * since we'll be redirecting std streams, we do
893 * not need the console.
894 * It is necessary to use DETACHED_PROCESS
895 * instead of CREATE_NO_WINDOW to make ssh
896 * recognize that it has no console.
897 */
898 flags = DETACHED_PROCESS;
899 } else {
900 /* There is already a console. If we specified
901 * DETACHED_PROCESS here, too, Windows would
902 * disassociate the child from the console.
903 * The same is true for CREATE_NO_WINDOW.
904 * Go figure!
905 */
906 flags = 0;
907 CloseHandle(cons);
908 }
909 memset(&si, 0, sizeof(si));
910 si.cb = sizeof(si);
911 si.dwFlags = STARTF_USESTDHANDLES;
912 si.hStdInput = (HANDLE) _get_osfhandle(fhin);
913 si.hStdOutput = (HANDLE) _get_osfhandle(fhout);
914 si.hStdError = (HANDLE) _get_osfhandle(fherr);
915
916 /* concatenate argv, quoting args as we go */
917 strbuf_init(&args, 0);
918 if (prepend_cmd) {
919 char *quoted = (char *)quote_arg(cmd);
920 strbuf_addstr(&args, quoted);
921 if (quoted != cmd)
922 free(quoted);
923 }
924 for (; *argv; argv++) {
925 char *quoted = (char *)quote_arg(*argv);
926 if (*args.buf)
927 strbuf_addch(&args, ' ');
928 strbuf_addstr(&args, quoted);
929 if (quoted != *argv)
930 free(quoted);
931 }
932
933 if (env) {
934 int count = 0;
935 char **e, **sorted_env;
936
937 for (e = env; *e; e++)
938 count++;
939
940 /* environment must be sorted */
941 sorted_env = xmalloc(sizeof(*sorted_env) * (count + 1));
942 memcpy(sorted_env, env, sizeof(*sorted_env) * (count + 1));
943 qsort(sorted_env, count, sizeof(*sorted_env), env_compare);
944
945 strbuf_init(&envblk, 0);
946 for (e = sorted_env; *e; e++) {
947 strbuf_addstr(&envblk, *e);
948 strbuf_addch(&envblk, '\0');
949 }
950 free(sorted_env);
951 }
952
953 memset(&pi, 0, sizeof(pi));
954 ret = CreateProcess(cmd, args.buf, NULL, NULL, TRUE, flags,
955 env ? envblk.buf : NULL, dir, &si, &pi);
956
957 if (env)
958 strbuf_release(&envblk);
959 strbuf_release(&args);
960
961 if (!ret) {
962 errno = ENOENT;
963 return -1;
964 }
965 CloseHandle(pi.hThread);
966 return (pid_t)pi.hProcess;
967 }
968
969 static pid_t mingw_spawnve(const char *cmd, const char **argv, char **env,
970 int prepend_cmd)
971 {
972 return mingw_spawnve_fd(cmd, argv, env, NULL, prepend_cmd, 0, 1, 2);
973 }
974
975 pid_t mingw_spawnvpe(const char *cmd, const char **argv, char **env,
976 const char *dir,
977 int fhin, int fhout, int fherr)
978 {
979 pid_t pid;
980 char **path = get_path_split();
981 char *prog = path_lookup(cmd, path, 0);
982
983 if (!prog) {
984 errno = ENOENT;
985 pid = -1;
986 }
987 else {
988 const char *interpr = parse_interpreter(prog);
989
990 if (interpr) {
991 const char *argv0 = argv[0];
992 char *iprog = path_lookup(interpr, path, 1);
993 argv[0] = prog;
994 if (!iprog) {
995 errno = ENOENT;
996 pid = -1;
997 }
998 else {
999 pid = mingw_spawnve_fd(iprog, argv, env, dir, 1,
1000 fhin, fhout, fherr);
1001 free(iprog);
1002 }
1003 argv[0] = argv0;
1004 }
1005 else
1006 pid = mingw_spawnve_fd(prog, argv, env, dir, 0,
1007 fhin, fhout, fherr);
1008 free(prog);
1009 }
1010 free_path_split(path);
1011 return pid;
1012 }
1013
1014 static int try_shell_exec(const char *cmd, char *const *argv, char **env)
1015 {
1016 const char *interpr = parse_interpreter(cmd);
1017 char **path;
1018 char *prog;
1019 int pid = 0;
1020
1021 if (!interpr)
1022 return 0;
1023 path = get_path_split();
1024 prog = path_lookup(interpr, path, 1);
1025 if (prog) {
1026 int argc = 0;
1027 const char **argv2;
1028 while (argv[argc]) argc++;
1029 argv2 = xmalloc(sizeof(*argv) * (argc+1));
1030 argv2[0] = (char *)cmd; /* full path to the script file */
1031 memcpy(&argv2[1], &argv[1], sizeof(*argv) * argc);
1032 pid = mingw_spawnve(prog, argv2, env, 1);
1033 if (pid >= 0) {
1034 int status;
1035 if (waitpid(pid, &status, 0) < 0)
1036 status = 255;
1037 exit(status);
1038 }
1039 pid = 1; /* indicate that we tried but failed */
1040 free(prog);
1041 free(argv2);
1042 }
1043 free_path_split(path);
1044 return pid;
1045 }
1046
1047 static void mingw_execve(const char *cmd, char *const *argv, char *const *env)
1048 {
1049 /* check if git_command is a shell script */
1050 if (!try_shell_exec(cmd, argv, (char **)env)) {
1051 int pid, status;
1052
1053 pid = mingw_spawnve(cmd, (const char **)argv, (char **)env, 0);
1054 if (pid < 0)
1055 return;
1056 if (waitpid(pid, &status, 0) < 0)
1057 status = 255;
1058 exit(status);
1059 }
1060 }
1061
1062 void mingw_execvp(const char *cmd, char *const *argv)
1063 {
1064 char **path = get_path_split();
1065 char *prog = path_lookup(cmd, path, 0);
1066
1067 if (prog) {
1068 mingw_execve(prog, argv, environ);
1069 free(prog);
1070 } else
1071 errno = ENOENT;
1072
1073 free_path_split(path);
1074 }
1075
1076 static char **copy_environ(void)
1077 {
1078 char **env;
1079 int i = 0;
1080 while (environ[i])
1081 i++;
1082 env = xmalloc((i+1)*sizeof(*env));
1083 for (i = 0; environ[i]; i++)
1084 env[i] = xstrdup(environ[i]);
1085 env[i] = NULL;
1086 return env;
1087 }
1088
1089 void free_environ(char **env)
1090 {
1091 int i;
1092 for (i = 0; env[i]; i++)
1093 free(env[i]);
1094 free(env);
1095 }
1096
1097 static int lookup_env(char **env, const char *name, size_t nmln)
1098 {
1099 int i;
1100
1101 for (i = 0; env[i]; i++) {
1102 if (0 == strncmp(env[i], name, nmln)
1103 && '=' == env[i][nmln])
1104 /* matches */
1105 return i;
1106 }
1107 return -1;
1108 }
1109
1110 /*
1111 * If name contains '=', then sets the variable, otherwise it unsets it
1112 */
1113 static char **env_setenv(char **env, const char *name)
1114 {
1115 char *eq = strchrnul(name, '=');
1116 int i = lookup_env(env, name, eq-name);
1117
1118 if (i < 0) {
1119 if (*eq) {
1120 for (i = 0; env[i]; i++)
1121 ;
1122 env = xrealloc(env, (i+2)*sizeof(*env));
1123 env[i] = xstrdup(name);
1124 env[i+1] = NULL;
1125 }
1126 }
1127 else {
1128 free(env[i]);
1129 if (*eq)
1130 env[i] = xstrdup(name);
1131 else
1132 for (; env[i]; i++)
1133 env[i] = env[i+1];
1134 }
1135 return env;
1136 }
1137
1138 /*
1139 * Copies global environ and adjusts variables as specified by vars.
1140 */
1141 char **make_augmented_environ(const char *const *vars)
1142 {
1143 char **env = copy_environ();
1144
1145 while (*vars)
1146 env = env_setenv(env, *vars++);
1147 return env;
1148 }
1149
1150 /*
1151 * Note, this isn't a complete replacement for getaddrinfo. It assumes
1152 * that service contains a numerical port, or that it it is null. It
1153 * does a simple search using gethostbyname, and returns one IPv4 host
1154 * if one was found.
1155 */
1156 static int WSAAPI getaddrinfo_stub(const char *node, const char *service,
1157 const struct addrinfo *hints,
1158 struct addrinfo **res)
1159 {
1160 struct hostent *h = gethostbyname(node);
1161 struct addrinfo *ai;
1162 struct sockaddr_in *sin;
1163
1164 if (!h)
1165 return WSAGetLastError();
1166
1167 ai = xmalloc(sizeof(struct addrinfo));
1168 *res = ai;
1169 ai->ai_flags = 0;
1170 ai->ai_family = AF_INET;
1171 ai->ai_socktype = hints->ai_socktype;
1172 switch (hints->ai_socktype) {
1173 case SOCK_STREAM:
1174 ai->ai_protocol = IPPROTO_TCP;
1175 break;
1176 case SOCK_DGRAM:
1177 ai->ai_protocol = IPPROTO_UDP;
1178 break;
1179 default:
1180 ai->ai_protocol = 0;
1181 break;
1182 }
1183 ai->ai_addrlen = sizeof(struct sockaddr_in);
1184 ai->ai_canonname = strdup(h->h_name);
1185
1186 sin = xmalloc(ai->ai_addrlen);
1187 memset(sin, 0, ai->ai_addrlen);
1188 sin->sin_family = AF_INET;
1189 if (service)
1190 sin->sin_port = htons(atoi(service));
1191 sin->sin_addr = *(struct in_addr *)h->h_addr;
1192 ai->ai_addr = (struct sockaddr *)sin;
1193 ai->ai_next = 0;
1194 return 0;
1195 }
1196
1197 static void WSAAPI freeaddrinfo_stub(struct addrinfo *res)
1198 {
1199 free(res->ai_canonname);
1200 free(res->ai_addr);
1201 free(res);
1202 }
1203
1204 static int WSAAPI getnameinfo_stub(const struct sockaddr *sa, socklen_t salen,
1205 char *host, DWORD hostlen,
1206 char *serv, DWORD servlen, int flags)
1207 {
1208 const struct sockaddr_in *sin = (const struct sockaddr_in *)sa;
1209 if (sa->sa_family != AF_INET)
1210 return EAI_FAMILY;
1211 if (!host && !serv)
1212 return EAI_NONAME;
1213
1214 if (host && hostlen > 0) {
1215 struct hostent *ent = NULL;
1216 if (!(flags & NI_NUMERICHOST))
1217 ent = gethostbyaddr((const char *)&sin->sin_addr,
1218 sizeof(sin->sin_addr), AF_INET);
1219
1220 if (ent)
1221 snprintf(host, hostlen, "%s", ent->h_name);
1222 else if (flags & NI_NAMEREQD)
1223 return EAI_NONAME;
1224 else
1225 snprintf(host, hostlen, "%s", inet_ntoa(sin->sin_addr));
1226 }
1227
1228 if (serv && servlen > 0) {
1229 struct servent *ent = NULL;
1230 if (!(flags & NI_NUMERICSERV))
1231 ent = getservbyport(sin->sin_port,
1232 flags & NI_DGRAM ? "udp" : "tcp");
1233
1234 if (ent)
1235 snprintf(serv, servlen, "%s", ent->s_name);
1236 else
1237 snprintf(serv, servlen, "%d", ntohs(sin->sin_port));
1238 }
1239
1240 return 0;
1241 }
1242
1243 static HMODULE ipv6_dll = NULL;
1244 static void (WSAAPI *ipv6_freeaddrinfo)(struct addrinfo *res);
1245 static int (WSAAPI *ipv6_getaddrinfo)(const char *node, const char *service,
1246 const struct addrinfo *hints,
1247 struct addrinfo **res);
1248 static int (WSAAPI *ipv6_getnameinfo)(const struct sockaddr *sa, socklen_t salen,
1249 char *host, DWORD hostlen,
1250 char *serv, DWORD servlen, int flags);
1251 /*
1252 * gai_strerror is an inline function in the ws2tcpip.h header, so we
1253 * don't need to try to load that one dynamically.
1254 */
1255
1256 static void socket_cleanup(void)
1257 {
1258 WSACleanup();
1259 if (ipv6_dll)
1260 FreeLibrary(ipv6_dll);
1261 ipv6_dll = NULL;
1262 ipv6_freeaddrinfo = freeaddrinfo_stub;
1263 ipv6_getaddrinfo = getaddrinfo_stub;
1264 ipv6_getnameinfo = getnameinfo_stub;
1265 }
1266
1267 static void ensure_socket_initialization(void)
1268 {
1269 WSADATA wsa;
1270 static int initialized = 0;
1271 const char *libraries[] = { "ws2_32.dll", "wship6.dll", NULL };
1272 const char **name;
1273
1274 if (initialized)
1275 return;
1276
1277 if (WSAStartup(MAKEWORD(2,2), &wsa))
1278 die("unable to initialize winsock subsystem, error %d",
1279 WSAGetLastError());
1280
1281 for (name = libraries; *name; name++) {
1282 ipv6_dll = LoadLibrary(*name);
1283 if (!ipv6_dll)
1284 continue;
1285
1286 ipv6_freeaddrinfo = (void (WSAAPI *)(struct addrinfo *))
1287 GetProcAddress(ipv6_dll, "freeaddrinfo");
1288 ipv6_getaddrinfo = (int (WSAAPI *)(const char *, const char *,
1289 const struct addrinfo *,
1290 struct addrinfo **))
1291 GetProcAddress(ipv6_dll, "getaddrinfo");
1292 ipv6_getnameinfo = (int (WSAAPI *)(const struct sockaddr *,
1293 socklen_t, char *, DWORD,
1294 char *, DWORD, int))
1295 GetProcAddress(ipv6_dll, "getnameinfo");
1296 if (!ipv6_freeaddrinfo || !ipv6_getaddrinfo || !ipv6_getnameinfo) {
1297 FreeLibrary(ipv6_dll);
1298 ipv6_dll = NULL;
1299 } else
1300 break;
1301 }
1302 if (!ipv6_freeaddrinfo || !ipv6_getaddrinfo || !ipv6_getnameinfo) {
1303 ipv6_freeaddrinfo = freeaddrinfo_stub;
1304 ipv6_getaddrinfo = getaddrinfo_stub;
1305 ipv6_getnameinfo = getnameinfo_stub;
1306 }
1307
1308 atexit(socket_cleanup);
1309 initialized = 1;
1310 }
1311
1312 #undef gethostbyname
1313 struct hostent *mingw_gethostbyname(const char *host)
1314 {
1315 ensure_socket_initialization();
1316 return gethostbyname(host);
1317 }
1318
1319 void mingw_freeaddrinfo(struct addrinfo *res)
1320 {
1321 ipv6_freeaddrinfo(res);
1322 }
1323
1324 int mingw_getaddrinfo(const char *node, const char *service,
1325 const struct addrinfo *hints, struct addrinfo **res)
1326 {
1327 ensure_socket_initialization();
1328 return ipv6_getaddrinfo(node, service, hints, res);
1329 }
1330
1331 int mingw_getnameinfo(const struct sockaddr *sa, socklen_t salen,
1332 char *host, DWORD hostlen, char *serv, DWORD servlen,
1333 int flags)
1334 {
1335 ensure_socket_initialization();
1336 return ipv6_getnameinfo(sa, salen, host, hostlen, serv, servlen, flags);
1337 }
1338
1339 int mingw_socket(int domain, int type, int protocol)
1340 {
1341 int sockfd;
1342 SOCKET s = WSASocket(domain, type, protocol, NULL, 0, 0);
1343 if (s == INVALID_SOCKET) {
1344 /*
1345 * WSAGetLastError() values are regular BSD error codes
1346 * biased by WSABASEERR.
1347 * However, strerror() does not know about networking
1348 * specific errors, which are values beginning at 38 or so.
1349 * Therefore, we choose to leave the biased error code
1350 * in errno so that _if_ someone looks up the code somewhere,
1351 * then it is at least the number that are usually listed.
1352 */
1353 errno = WSAGetLastError();
1354 return -1;
1355 }
1356 /* convert into a file descriptor */
1357 if ((sockfd = _open_osfhandle(s, O_RDWR|O_BINARY)) < 0) {
1358 closesocket(s);
1359 return error("unable to make a socket file descriptor: %s",
1360 strerror(errno));
1361 }
1362 return sockfd;
1363 }
1364
1365 #undef connect
1366 int mingw_connect(int sockfd, struct sockaddr *sa, size_t sz)
1367 {
1368 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
1369 return connect(s, sa, sz);
1370 }
1371
1372 #undef rename
1373 int mingw_rename(const char *pold, const char *pnew)
1374 {
1375 DWORD attrs, gle;
1376 int tries = 0;
1377
1378 /*
1379 * Try native rename() first to get errno right.
1380 * It is based on MoveFile(), which cannot overwrite existing files.
1381 */
1382 if (!rename(pold, pnew))
1383 return 0;
1384 if (errno != EEXIST)
1385 return -1;
1386 repeat:
1387 if (MoveFileEx(pold, pnew, MOVEFILE_REPLACE_EXISTING))
1388 return 0;
1389 /* TODO: translate more errors */
1390 gle = GetLastError();
1391 if (gle == ERROR_ACCESS_DENIED &&
1392 (attrs = GetFileAttributes(pnew)) != INVALID_FILE_ATTRIBUTES) {
1393 if (attrs & FILE_ATTRIBUTE_DIRECTORY) {
1394 errno = EISDIR;
1395 return -1;
1396 }
1397 if ((attrs & FILE_ATTRIBUTE_READONLY) &&
1398 SetFileAttributes(pnew, attrs & ~FILE_ATTRIBUTE_READONLY)) {
1399 if (MoveFileEx(pold, pnew, MOVEFILE_REPLACE_EXISTING))
1400 return 0;
1401 gle = GetLastError();
1402 /* revert file attributes on failure */
1403 SetFileAttributes(pnew, attrs);
1404 }
1405 }
1406 if (tries < ARRAY_SIZE(delay) && gle == ERROR_ACCESS_DENIED) {
1407 /*
1408 * We assume that some other process had the source or
1409 * destination file open at the wrong moment and retry.
1410 * In order to give the other process a higher chance to
1411 * complete its operation, we give up our time slice now.
1412 * If we have to retry again, we do sleep a bit.
1413 */
1414 Sleep(delay[tries]);
1415 tries++;
1416 goto repeat;
1417 }
1418 if (gle == ERROR_ACCESS_DENIED &&
1419 ask_user_yes_no("Rename from '%s' to '%s' failed. "
1420 "Should I try again?", pold, pnew))
1421 goto repeat;
1422
1423 errno = EACCES;
1424 return -1;
1425 }
1426
1427 /*
1428 * Note that this doesn't return the actual pagesize, but
1429 * the allocation granularity. If future Windows specific git code
1430 * needs the real getpagesize function, we need to find another solution.
1431 */
1432 int mingw_getpagesize(void)
1433 {
1434 SYSTEM_INFO si;
1435 GetSystemInfo(&si);
1436 return si.dwAllocationGranularity;
1437 }
1438
1439 struct passwd *getpwuid(int uid)
1440 {
1441 static char user_name[100];
1442 static struct passwd p;
1443
1444 DWORD len = sizeof(user_name);
1445 if (!GetUserName(user_name, &len))
1446 return NULL;
1447 p.pw_name = user_name;
1448 p.pw_gecos = "unknown";
1449 p.pw_dir = NULL;
1450 return &p;
1451 }
1452
1453 static HANDLE timer_event;
1454 static HANDLE timer_thread;
1455 static int timer_interval;
1456 static int one_shot;
1457 static sig_handler_t timer_fn = SIG_DFL;
1458
1459 /* The timer works like this:
1460 * The thread, ticktack(), is a trivial routine that most of the time
1461 * only waits to receive the signal to terminate. The main thread tells
1462 * the thread to terminate by setting the timer_event to the signalled
1463 * state.
1464 * But ticktack() interrupts the wait state after the timer's interval
1465 * length to call the signal handler.
1466 */
1467
1468 static unsigned __stdcall ticktack(void *dummy)
1469 {
1470 while (WaitForSingleObject(timer_event, timer_interval) == WAIT_TIMEOUT) {
1471 if (timer_fn == SIG_DFL)
1472 die("Alarm");
1473 if (timer_fn != SIG_IGN)
1474 timer_fn(SIGALRM);
1475 if (one_shot)
1476 break;
1477 }
1478 return 0;
1479 }
1480
1481 static int start_timer_thread(void)
1482 {
1483 timer_event = CreateEvent(NULL, FALSE, FALSE, NULL);
1484 if (timer_event) {
1485 timer_thread = (HANDLE) _beginthreadex(NULL, 0, ticktack, NULL, 0, NULL);
1486 if (!timer_thread )
1487 return errno = ENOMEM,
1488 error("cannot start timer thread");
1489 } else
1490 return errno = ENOMEM,
1491 error("cannot allocate resources for timer");
1492 return 0;
1493 }
1494
1495 static void stop_timer_thread(void)
1496 {
1497 if (timer_event)
1498 SetEvent(timer_event); /* tell thread to terminate */
1499 if (timer_thread) {
1500 int rc = WaitForSingleObject(timer_thread, 1000);
1501 if (rc == WAIT_TIMEOUT)
1502 error("timer thread did not terminate timely");
1503 else if (rc != WAIT_OBJECT_0)
1504 error("waiting for timer thread failed: %lu",
1505 GetLastError());
1506 CloseHandle(timer_thread);
1507 }
1508 if (timer_event)
1509 CloseHandle(timer_event);
1510 timer_event = NULL;
1511 timer_thread = NULL;
1512 }
1513
1514 static inline int is_timeval_eq(const struct timeval *i1, const struct timeval *i2)
1515 {
1516 return i1->tv_sec == i2->tv_sec && i1->tv_usec == i2->tv_usec;
1517 }
1518
1519 int setitimer(int type, struct itimerval *in, struct itimerval *out)
1520 {
1521 static const struct timeval zero;
1522 static int atexit_done;
1523
1524 if (out != NULL)
1525 return errno = EINVAL,
1526 error("setitimer param 3 != NULL not implemented");
1527 if (!is_timeval_eq(&in->it_interval, &zero) &&
1528 !is_timeval_eq(&in->it_interval, &in->it_value))
1529 return errno = EINVAL,
1530 error("setitimer: it_interval must be zero or eq it_value");
1531
1532 if (timer_thread)
1533 stop_timer_thread();
1534
1535 if (is_timeval_eq(&in->it_value, &zero) &&
1536 is_timeval_eq(&in->it_interval, &zero))
1537 return 0;
1538
1539 timer_interval = in->it_value.tv_sec * 1000 + in->it_value.tv_usec / 1000;
1540 one_shot = is_timeval_eq(&in->it_interval, &zero);
1541 if (!atexit_done) {
1542 atexit(stop_timer_thread);
1543 atexit_done = 1;
1544 }
1545 return start_timer_thread();
1546 }
1547
1548 int sigaction(int sig, struct sigaction *in, struct sigaction *out)
1549 {
1550 if (sig != SIGALRM)
1551 return errno = EINVAL,
1552 error("sigaction only implemented for SIGALRM");
1553 if (out != NULL)
1554 return errno = EINVAL,
1555 error("sigaction: param 3 != NULL not implemented");
1556
1557 timer_fn = in->sa_handler;
1558 return 0;
1559 }
1560
1561 #undef signal
1562 sig_handler_t mingw_signal(int sig, sig_handler_t handler)
1563 {
1564 sig_handler_t old = timer_fn;
1565 if (sig != SIGALRM)
1566 return signal(sig, handler);
1567 timer_fn = handler;
1568 return old;
1569 }
1570
1571 static const char *make_backslash_path(const char *path)
1572 {
1573 static char buf[PATH_MAX + 1];
1574 char *c;
1575
1576 if (strlcpy(buf, path, PATH_MAX) >= PATH_MAX)
1577 die("Too long path: %.*s", 60, path);
1578
1579 for (c = buf; *c; c++) {
1580 if (*c == '/')
1581 *c = '\\';
1582 }
1583 return buf;
1584 }
1585
1586 void mingw_open_html(const char *unixpath)
1587 {
1588 const char *htmlpath = make_backslash_path(unixpath);
1589 typedef HINSTANCE (WINAPI *T)(HWND, const char *,
1590 const char *, const char *, const char *, INT);
1591 T ShellExecute;
1592 HMODULE shell32;
1593 int r;
1594
1595 shell32 = LoadLibrary("shell32.dll");
1596 if (!shell32)
1597 die("cannot load shell32.dll");
1598 ShellExecute = (T)GetProcAddress(shell32, "ShellExecuteA");
1599 if (!ShellExecute)
1600 die("cannot run browser");
1601
1602 printf("Launching default browser to display HTML ...\n");
1603 r = (int)ShellExecute(NULL, "open", htmlpath, NULL, "\\", SW_SHOWNORMAL);
1604 FreeLibrary(shell32);
1605 /* see the MSDN documentation referring to the result codes here */
1606 if (r <= 32) {
1607 die("failed to launch browser for %.*s", MAX_PATH, unixpath);
1608 }
1609 }
1610
1611 int link(const char *oldpath, const char *newpath)
1612 {
1613 typedef BOOL (WINAPI *T)(const char*, const char*, LPSECURITY_ATTRIBUTES);
1614 static T create_hard_link = NULL;
1615 if (!create_hard_link) {
1616 create_hard_link = (T) GetProcAddress(
1617 GetModuleHandle("kernel32.dll"), "CreateHardLinkA");
1618 if (!create_hard_link)
1619 create_hard_link = (T)-1;
1620 }
1621 if (create_hard_link == (T)-1) {
1622 errno = ENOSYS;
1623 return -1;
1624 }
1625 if (!create_hard_link(newpath, oldpath, NULL)) {
1626 errno = err_win_to_posix(GetLastError());
1627 return -1;
1628 }
1629 return 0;
1630 }
1631
1632 char *getpass(const char *prompt)
1633 {
1634 struct strbuf buf = STRBUF_INIT;
1635
1636 fputs(prompt, stderr);
1637 for (;;) {
1638 char c = _getch();
1639 if (c == '\r' || c == '\n')
1640 break;
1641 strbuf_addch(&buf, c);
1642 }
1643 fputs("\n", stderr);
1644 return strbuf_detach(&buf, NULL);
1645 }
1646
1647 #ifndef NO_MINGW_REPLACE_READDIR
1648 /* MinGW readdir implementation to avoid extra lstats for Git */
1649 struct mingw_DIR
1650 {
1651 struct _finddata_t dd_dta; /* disk transfer area for this dir */
1652 struct mingw_dirent dd_dir; /* Our own implementation, including d_type */
1653 long dd_handle; /* _findnext handle */
1654 int dd_stat; /* 0 = next entry to read is first entry, -1 = off the end, positive = 0 based index of next entry */
1655 char dd_name[1]; /* given path for dir with search pattern (struct is extended) */
1656 };
1657
1658 struct dirent *mingw_readdir(DIR *dir)
1659 {
1660 WIN32_FIND_DATAA buf;
1661 HANDLE handle;
1662 struct mingw_DIR *mdir = (struct mingw_DIR*)dir;
1663
1664 if (!dir->dd_handle) {
1665 errno = EBADF; /* No set_errno for mingw */
1666 return NULL;
1667 }
1668
1669 if (dir->dd_handle == (long)INVALID_HANDLE_VALUE && dir->dd_stat == 0)
1670 {
1671 DWORD lasterr;
1672 handle = FindFirstFileA(dir->dd_name, &buf);
1673 lasterr = GetLastError();
1674 dir->dd_handle = (long)handle;
1675 if (handle == INVALID_HANDLE_VALUE && (lasterr != ERROR_NO_MORE_FILES)) {
1676 errno = err_win_to_posix(lasterr);
1677 return NULL;
1678 }
1679 } else if (dir->dd_handle == (long)INVALID_HANDLE_VALUE) {
1680 return NULL;
1681 } else if (!FindNextFileA((HANDLE)dir->dd_handle, &buf)) {
1682 DWORD lasterr = GetLastError();
1683 FindClose((HANDLE)dir->dd_handle);
1684 dir->dd_handle = (long)INVALID_HANDLE_VALUE;
1685 /* POSIX says you shouldn't set errno when readdir can't
1686 find any more files; so, if another error we leave it set. */
1687 if (lasterr != ERROR_NO_MORE_FILES)
1688 errno = err_win_to_posix(lasterr);
1689 return NULL;
1690 }
1691
1692 /* We get here if `buf' contains valid data. */
1693 strcpy(dir->dd_dir.d_name, buf.cFileName);
1694 ++dir->dd_stat;
1695
1696 /* Set file type, based on WIN32_FIND_DATA */
1697 mdir->dd_dir.d_type = 0;
1698 if (buf.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)
1699 mdir->dd_dir.d_type |= DT_DIR;
1700 else
1701 mdir->dd_dir.d_type |= DT_REG;
1702
1703 return (struct dirent*)&dir->dd_dir;
1704 }
1705 #endif // !NO_MINGW_REPLACE_READDIR
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