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Revert "Windows: teach getenv to do a case-sensitive search"
[git/dscho.git] / compat / mingw.c
blob335965b290751cbf24aa6779b7872753a268495a
1 #include "../git-compat-util.h"
2 #include "win32.h"
3 #include <conio.h>
4 #include "../strbuf.h"
5 #include "../run-command.h"
6 #include "../cache.h"
7
8 static const int delay[] = { 0, 1, 10, 20, 40 };
9 unsigned int _CRT_fmode = _O_BINARY;
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 inline int is_file_in_use_error(DWORD errcode)
125 {
126 switch (errcode) {
127 case ERROR_SHARING_VIOLATION:
128 case ERROR_ACCESS_DENIED:
129 return 1;
130 }
131
132 return 0;
133 }
134
135 static int read_yes_no_answer(void)
136 {
137 char answer[1024];
138
139 if (fgets(answer, sizeof(answer), stdin)) {
140 size_t answer_len = strlen(answer);
141 int got_full_line = 0, c;
142
143 /* remove the newline */
144 if (answer_len >= 2 && answer[answer_len-2] == '\r') {
145 answer[answer_len-2] = '\0';
146 got_full_line = 1;
147 } else if (answer_len >= 1 && answer[answer_len-1] == '\n') {
148 answer[answer_len-1] = '\0';
149 got_full_line = 1;
150 }
151 /* flush the buffer in case we did not get the full line */
152 if (!got_full_line)
153 while ((c = getchar()) != EOF && c != '\n')
154 ;
155 } else
156 /* we could not read, return the
157 * default answer which is no */
158 return 0;
159
160 if (tolower(answer[0]) == 'y' && !answer[1])
161 return 1;
162 if (!strncasecmp(answer, "yes", sizeof(answer)))
163 return 1;
164 if (tolower(answer[0]) == 'n' && !answer[1])
165 return 0;
166 if (!strncasecmp(answer, "no", sizeof(answer)))
167 return 0;
168
169 /* did not find an answer we understand */
170 return -1;
171 }
172
173 static int ask_yes_no_if_possible(const char *format, ...)
174 {
175 char question[4096];
176 const char *retry_hook[] = { NULL, NULL, NULL };
177 va_list args;
178
179 va_start(args, format);
180 vsnprintf(question, sizeof(question), format, args);
181 va_end(args);
182
183 if ((retry_hook[0] = mingw_getenv("GIT_ASK_YESNO"))) {
184 retry_hook[1] = question;
185 return !run_command_v_opt(retry_hook, 0);
186 }
187
188 if (!isatty(_fileno(stdin)) || !isatty(_fileno(stderr)))
189 return 0;
190
191 while (1) {
192 int answer;
193 fprintf(stderr, "%s (y/n) ", question);
194
195 if ((answer = read_yes_no_answer()) >= 0)
196 return answer;
197
198 fprintf(stderr, "Sorry, I did not understand your answer. "
199 "Please type 'y' or 'n'\n");
200 }
201 }
202
203 #undef unlink
204 int mingw_unlink(const char *pathname)
205 {
206 int ret, tries = 0;
207
208 /* read-only files cannot be removed */
209 chmod(pathname, 0666);
210 while ((ret = unlink(pathname)) == -1 && tries < ARRAY_SIZE(delay)) {
211 if (!is_file_in_use_error(GetLastError()))
212 break;
213 /*
214 * We assume that some other process had the source or
215 * destination file open at the wrong moment and retry.
216 * In order to give the other process a higher chance to
217 * complete its operation, we give up our time slice now.
218 * If we have to retry again, we do sleep a bit.
219 */
220 Sleep(delay[tries]);
221 tries++;
222 }
223 while (ret == -1 && is_file_in_use_error(GetLastError()) &&
224 ask_yes_no_if_possible("Unlink of file '%s' failed. "
225 "Should I try again?", pathname))
226 ret = unlink(pathname);
227 return ret;
228 }
229
230 static int is_dir_empty(const char *path)
231 {
232 struct strbuf buf = STRBUF_INIT;
233 WIN32_FIND_DATAA findbuf;
234 HANDLE handle;
235
236 strbuf_addf(&buf, "%s\\*", path);
237 handle = FindFirstFileA(buf.buf, &findbuf);
238 if (handle == INVALID_HANDLE_VALUE) {
239 strbuf_release(&buf);
240 return GetLastError() == ERROR_NO_MORE_FILES;
241 }
242
243 while (!wcscmp(findbuf.cFileName, L".") ||
244 !wcscmp(findbuf.cFileName, L".."))
245 if (!FindNextFileW(handle, &findbuf)) {
246 DWORD err = GetLastError();
247 FindClose(handle);
248 return err == ERROR_NO_MORE_FILES;
249 }
250 FindClose(handle);
251 strbuf_release(&buf);
252 return 0;
253 }
254
255 #undef rmdir
256 int mingw_rmdir(const char *pathname)
257 {
258 int ret, tries = 0;
259
260 while ((ret = rmdir(pathname)) == -1 && tries < ARRAY_SIZE(delay)) {
261 if (!is_file_in_use_error(GetLastError()))
262 break;
263 if (!is_dir_empty(pathname)) {
264 errno = ENOTEMPTY;
265 break;
266 }
267 /*
268 * We assume that some other process had the source or
269 * destination file open at the wrong moment and retry.
270 * In order to give the other process a higher chance to
271 * complete its operation, we give up our time slice now.
272 * If we have to retry again, we do sleep a bit.
273 */
274 Sleep(delay[tries]);
275 tries++;
276 }
277 while (ret == -1 && is_file_in_use_error(GetLastError()) &&
278 ask_yes_no_if_possible("Deletion of directory '%s' failed. "
279 "Should I try again?", pathname))
280 ret = rmdir(pathname);
281 return ret;
282 }
283
284 static int make_hidden(const char *path)
285 {
286 DWORD attribs = GetFileAttributes(path);
287 if (SetFileAttributes(path, FILE_ATTRIBUTE_HIDDEN | attribs))
288 return 0;
289 errno = err_win_to_posix(GetLastError());
290 return -1;
291 }
292
293 void mingw_mark_as_git_dir(const char *dir)
294 {
295 if (hide_dotfiles != HIDE_DOTFILES_FALSE && !is_bare_repository() &&
296 make_hidden(dir))
297 warning("Failed to make '%s' hidden", dir);
298 git_config_set("core.hideDotFiles",
299 hide_dotfiles == HIDE_DOTFILES_FALSE ? "false" :
300 (hide_dotfiles == HIDE_DOTFILES_DOTGITONLY ?
301 "dotGitOnly" : "true"));
302 }
303
304 #undef mkdir
305 int mingw_mkdir(const char *path, int mode)
306 {
307 int ret = mkdir(path);
308 if (!ret && hide_dotfiles == HIDE_DOTFILES_TRUE) {
309 /*
310 * In Windows a file or dir starting with a dot is not
311 * automatically hidden. So lets mark it as hidden when
312 * such a directory is created.
313 */
314 const char *start = basename((char*)path);
315 if (*start == '.')
316 return make_hidden(path);
317 }
318 return ret;
319 }
320
321 #undef open
322 int mingw_open (const char *filename, int oflags, ...)
323 {
324 va_list args;
325 unsigned mode;
326 int fd;
327
328 va_start(args, oflags);
329 mode = va_arg(args, int);
330 va_end(args);
331
332 if (filename && !strcmp(filename, "/dev/null"))
333 filename = "nul";
334
335 fd = open(filename, oflags, mode);
336
337 if (fd < 0 && (oflags & O_CREAT) && errno == EACCES) {
338 DWORD attrs = GetFileAttributes(filename);
339 if (attrs != INVALID_FILE_ATTRIBUTES && (attrs & FILE_ATTRIBUTE_DIRECTORY))
340 errno = EISDIR;
341 }
342 if ((oflags & O_CREAT) && fd >= 0 &&
343 hide_dotfiles == HIDE_DOTFILES_TRUE) {
344 /*
345 * In Windows a file or dir starting with a dot is not
346 * automatically hidden. So lets mark it as hidden when
347 * such a file is created.
348 */
349 const char *start = basename((char*)filename);
350 if (*start == '.' && make_hidden(filename))
351 warning("Could not mark '%s' as hidden.", filename);
352 }
353 return fd;
354 }
355
356 #undef write
357 ssize_t mingw_write(int fd, const void *buf, size_t count)
358 {
359 /*
360 * While write() calls to a file on a local disk are translated
361 * into WriteFile() calls with a maximum size of 64KB on Windows
362 * XP and 256KB on Vista, no such cap is placed on writes to
363 * files over the network on Windows XP. Unfortunately, there
364 * seems to be a limit of 32MB-28KB on X64 and 64MB-32KB on x86;
365 * bigger writes fail on Windows XP.
366 * So we cap to a nice 31MB here to avoid write failures over
367 * the net without changing the number of WriteFile() calls in
368 * the local case.
369 */
370 return write(fd, buf, min(count, 31 * 1024 * 1024));
371 }
372
373 #undef fopen
374 FILE *mingw_fopen (const char *filename, const char *otype)
375 {
376 int hide = 0;
377 FILE *file;
378 if (hide_dotfiles == HIDE_DOTFILES_TRUE &&
379 basename((char*)filename)[0] == '.')
380 hide = access(filename, F_OK);
381 if (filename && !strcmp(filename, "/dev/null"))
382 filename = "nul";
383 file = fopen(filename, otype);
384 if (file && hide && make_hidden(filename))
385 warning("Could not mark '%s' as hidden.", filename);
386 return file;
387 }
388
389 #undef freopen
390 FILE *mingw_freopen (const char *filename, const char *otype, FILE *stream)
391 {
392 int hide = 0;
393 FILE *file;
394 if (hide_dotfiles == HIDE_DOTFILES_TRUE &&
395 basename((char*)filename)[0] == '.')
396 hide = access(filename, F_OK);
397 if (filename && !strcmp(filename, "/dev/null"))
398 filename = "nul";
399 file = freopen(filename, otype, stream);
400 if (file && hide && make_hidden(filename))
401 warning("Could not mark '%s' as hidden.", filename);
402 return file;
403 }
404
405 /*
406 * The unit of FILETIME is 100-nanoseconds since January 1, 1601, UTC.
407 * Returns the 100-nanoseconds ("hekto nanoseconds") since the epoch.
408 */
409 static inline long long filetime_to_hnsec(const FILETIME *ft)
410 {
411 long long winTime = ((long long)ft->dwHighDateTime << 32) + ft->dwLowDateTime;
412 /* Windows to Unix Epoch conversion */
413 return winTime - 116444736000000000LL;
414 }
415
416 static inline time_t filetime_to_time_t(const FILETIME *ft)
417 {
418 return (time_t)(filetime_to_hnsec(ft) / 10000000);
419 }
420
421 /* We keep the do_lstat code in a separate function to avoid recursion.
422 * When a path ends with a slash, the stat will fail with ENOENT. In
423 * this case, we strip the trailing slashes and stat again.
424 *
425 * If follow is true then act like stat() and report on the link
426 * target. Otherwise report on the link itself.
427 */
428 static int do_lstat(int follow, const char *file_name, struct stat *buf)
429 {
430 int err;
431 WIN32_FILE_ATTRIBUTE_DATA fdata;
432
433 if (!(err = get_file_attr(file_name, &fdata))) {
434 buf->st_ino = 0;
435 buf->st_gid = 0;
436 buf->st_uid = 0;
437 buf->st_nlink = 1;
438 buf->st_mode = file_attr_to_st_mode(fdata.dwFileAttributes);
439 buf->st_size = fdata.nFileSizeLow |
440 (((off_t)fdata.nFileSizeHigh)<<32);
441 buf->st_dev = buf->st_rdev = 0; /* not used by Git */
442 buf->st_atime = filetime_to_time_t(&(fdata.ftLastAccessTime));
443 buf->st_mtime = filetime_to_time_t(&(fdata.ftLastWriteTime));
444 buf->st_ctime = filetime_to_time_t(&(fdata.ftCreationTime));
445 if (fdata.dwFileAttributes & FILE_ATTRIBUTE_REPARSE_POINT) {
446 WIN32_FIND_DATAA findbuf;
447 HANDLE handle = FindFirstFileA(file_name, &findbuf);
448 if (handle != INVALID_HANDLE_VALUE) {
449 if ((findbuf.dwFileAttributes & FILE_ATTRIBUTE_REPARSE_POINT) &&
450 (findbuf.dwReserved0 == IO_REPARSE_TAG_SYMLINK)) {
451 if (follow) {
452 char buffer[MAXIMUM_REPARSE_DATA_BUFFER_SIZE];
453 buf->st_size = readlink(file_name, buffer, MAXIMUM_REPARSE_DATA_BUFFER_SIZE);
454 } else {
455 buf->st_mode = S_IFLNK;
456 }
457 buf->st_mode |= S_IREAD;
458 if (!(findbuf.dwFileAttributes & FILE_ATTRIBUTE_READONLY))
459 buf->st_mode |= S_IWRITE;
460 }
461 FindClose(handle);
462 }
463 }
464 return 0;
465 }
466 errno = err;
467 return -1;
468 }
469
470 /* We provide our own lstat/fstat functions, since the provided
471 * lstat/fstat functions are so slow. These stat functions are
472 * tailored for Git's usage (read: fast), and are not meant to be
473 * complete. Note that Git stat()s are redirected to mingw_lstat()
474 * too, since Windows doesn't really handle symlinks that well.
475 */
476 static int do_stat_internal(int follow, const char *file_name, struct stat *buf)
477 {
478 int namelen;
479 char alt_name[PATH_MAX];
480
481 if (!do_lstat(follow, file_name, buf))
482 return 0;
483
484 /* if file_name ended in a '/', Windows returned ENOENT;
485 * try again without trailing slashes
486 */
487 if (errno != ENOENT)
488 return -1;
489
490 namelen = strlen(file_name);
491 if (namelen && file_name[namelen-1] != '/')
492 return -1;
493 while (namelen && file_name[namelen-1] == '/')
494 --namelen;
495 if (!namelen || namelen >= PATH_MAX)
496 return -1;
497
498 memcpy(alt_name, file_name, namelen);
499 alt_name[namelen] = 0;
500 return do_lstat(follow, alt_name, buf);
501 }
502
503 int mingw_lstat(const char *file_name, struct stat *buf)
504 {
505 return do_stat_internal(0, file_name, buf);
506 }
507 int mingw_stat(const char *file_name, struct stat *buf)
508 {
509 return do_stat_internal(1, file_name, buf);
510 }
511
512 #undef fstat
513 int mingw_fstat(int fd, struct stat *buf)
514 {
515 HANDLE fh = (HANDLE)_get_osfhandle(fd);
516 BY_HANDLE_FILE_INFORMATION fdata;
517
518 if (fh == INVALID_HANDLE_VALUE) {
519 errno = EBADF;
520 return -1;
521 }
522 /* direct non-file handles to MS's fstat() */
523 if (GetFileType(fh) != FILE_TYPE_DISK)
524 return _fstati64(fd, buf);
525
526 if (GetFileInformationByHandle(fh, &fdata)) {
527 buf->st_ino = 0;
528 buf->st_gid = 0;
529 buf->st_uid = 0;
530 buf->st_nlink = 1;
531 buf->st_mode = file_attr_to_st_mode(fdata.dwFileAttributes);
532 buf->st_size = fdata.nFileSizeLow |
533 (((off_t)fdata.nFileSizeHigh)<<32);
534 buf->st_dev = buf->st_rdev = 0; /* not used by Git */
535 buf->st_atime = filetime_to_time_t(&(fdata.ftLastAccessTime));
536 buf->st_mtime = filetime_to_time_t(&(fdata.ftLastWriteTime));
537 buf->st_ctime = filetime_to_time_t(&(fdata.ftCreationTime));
538 return 0;
539 }
540 errno = EBADF;
541 return -1;
542 }
543
544 static inline void time_t_to_filetime(time_t t, FILETIME *ft)
545 {
546 long long winTime = t * 10000000LL + 116444736000000000LL;
547 ft->dwLowDateTime = winTime;
548 ft->dwHighDateTime = winTime >> 32;
549 }
550
551 int mingw_utime (const char *file_name, const struct utimbuf *times)
552 {
553 FILETIME mft, aft;
554 int fh, rc;
555
556 /* must have write permission */
557 DWORD attrs = GetFileAttributes(file_name);
558 if (attrs != INVALID_FILE_ATTRIBUTES &&
559 (attrs & FILE_ATTRIBUTE_READONLY)) {
560 /* ignore errors here; open() will report them */
561 SetFileAttributes(file_name, attrs & ~FILE_ATTRIBUTE_READONLY);
562 }
563
564 if ((fh = open(file_name, O_RDWR | O_BINARY)) < 0) {
565 rc = -1;
566 goto revert_attrs;
567 }
568
569 if (times) {
570 time_t_to_filetime(times->modtime, &mft);
571 time_t_to_filetime(times->actime, &aft);
572 } else {
573 GetSystemTimeAsFileTime(&mft);
574 aft = mft;
575 }
576 if (!SetFileTime((HANDLE)_get_osfhandle(fh), NULL, &aft, &mft)) {
577 errno = EINVAL;
578 rc = -1;
579 } else
580 rc = 0;
581 close(fh);
582
583 revert_attrs:
584 if (attrs != INVALID_FILE_ATTRIBUTES &&
585 (attrs & FILE_ATTRIBUTE_READONLY)) {
586 /* ignore errors again */
587 SetFileAttributes(file_name, attrs);
588 }
589 return rc;
590 }
591
592 unsigned int sleep (unsigned int seconds)
593 {
594 Sleep(seconds*1000);
595 return 0;
596 }
597
598 int mkstemp(char *template)
599 {
600 char *filename = mktemp(template);
601 if (filename == NULL)
602 return -1;
603 return open(filename, O_RDWR | O_CREAT, 0600);
604 }
605
606 int gettimeofday(struct timeval *tv, void *tz)
607 {
608 FILETIME ft;
609 long long hnsec;
610
611 GetSystemTimeAsFileTime(&ft);
612 hnsec = filetime_to_hnsec(&ft);
613 tv->tv_sec = hnsec / 10000000;
614 tv->tv_usec = (hnsec % 10000000) / 10;
615 return 0;
616 }
617
618 int pipe(int filedes[2])
619 {
620 HANDLE h[2];
621
622 /* this creates non-inheritable handles */
623 if (!CreatePipe(&h[0], &h[1], NULL, 8192)) {
624 errno = err_win_to_posix(GetLastError());
625 return -1;
626 }
627 filedes[0] = _open_osfhandle((int)h[0], O_NOINHERIT);
628 if (filedes[0] < 0) {
629 CloseHandle(h[0]);
630 CloseHandle(h[1]);
631 return -1;
632 }
633 filedes[1] = _open_osfhandle((int)h[1], O_NOINHERIT);
634 if (filedes[0] < 0) {
635 close(filedes[0]);
636 CloseHandle(h[1]);
637 return -1;
638 }
639 return 0;
640 }
641
642 struct tm *gmtime_r(const time_t *timep, struct tm *result)
643 {
644 /* gmtime() in MSVCRT.DLL is thread-safe, but not reentrant */
645 memcpy(result, gmtime(timep), sizeof(struct tm));
646 return result;
647 }
648
649 struct tm *localtime_r(const time_t *timep, struct tm *result)
650 {
651 /* localtime() in MSVCRT.DLL is thread-safe, but not reentrant */
652 memcpy(result, localtime(timep), sizeof(struct tm));
653 return result;
654 }
655
656 #undef getcwd
657 char *mingw_getcwd(char *pointer, int len)
658 {
659 int i;
660 char *ret = getcwd(pointer, len);
661 if (!ret)
662 return ret;
663 for (i = 0; pointer[i]; i++)
664 if (pointer[i] == '\\')
665 pointer[i] = '/';
666 return ret;
667 }
668
669 /*
670 * See http://msdn2.microsoft.com/en-us/library/17w5ykft(vs.71).aspx
671 * (Parsing C++ Command-Line Arguments)
672 */
673 static const char *quote_arg(const char *arg)
674 {
675 /* count chars to quote */
676 int len = 0, n = 0;
677 int force_quotes = 0;
678 char *q, *d;
679 const char *p = arg;
680 if (!*p) force_quotes = 1;
681 while (*p) {
682 if (isspace(*p) || *p == '*' || *p == '?' || *p == '{' || *p == '\'')
683 force_quotes = 1;
684 else if (*p == '"')
685 n++;
686 else if (*p == '\\') {
687 int count = 0;
688 while (*p == '\\') {
689 count++;
690 p++;
691 len++;
692 }
693 if (*p == '"')
694 n += count*2 + 1;
695 continue;
696 }
697 len++;
698 p++;
699 }
700 if (!force_quotes && n == 0)
701 return arg;
702
703 /* insert \ where necessary */
704 d = q = xmalloc(len+n+3);
705 *d++ = '"';
706 while (*arg) {
707 if (*arg == '"')
708 *d++ = '\\';
709 else if (*arg == '\\') {
710 int count = 0;
711 while (*arg == '\\') {
712 count++;
713 *d++ = *arg++;
714 }
715 if (*arg == '"') {
716 while (count-- > 0)
717 *d++ = '\\';
718 *d++ = '\\';
719 }
720 }
721 *d++ = *arg++;
722 }
723 *d++ = '"';
724 *d++ = 0;
725 return q;
726 }
727
728 static const char *parse_interpreter(const char *cmd)
729 {
730 static char buf[100];
731 char *p, *opt;
732 int n, fd;
733
734 /* don't even try a .exe */
735 n = strlen(cmd);
736 if (n >= 4 && !strcasecmp(cmd+n-4, ".exe"))
737 return NULL;
738
739 fd = open(cmd, O_RDONLY);
740 if (fd < 0)
741 return NULL;
742 n = read(fd, buf, sizeof(buf)-1);
743 close(fd);
744 if (n < 4) /* at least '#!/x' and not error */
745 return NULL;
746
747 if (buf[0] != '#' || buf[1] != '!')
748 return NULL;
749 buf[n] = '\0';
750 p = buf + strcspn(buf, "\r\n");
751 if (!*p)
752 return NULL;
753
754 *p = '\0';
755 if (!(p = strrchr(buf+2, '/')) && !(p = strrchr(buf+2, '\\')))
756 return NULL;
757 /* strip options */
758 if ((opt = strchr(p+1, ' ')))
759 *opt = '\0';
760 return p+1;
761 }
762
763 /*
764 * Splits the PATH into parts.
765 */
766 static char **get_path_split(void)
767 {
768 char *p, **path, *envpath = mingw_getenv("PATH");
769 int i, n = 0;
770
771 if (!envpath || !*envpath)
772 return NULL;
773
774 envpath = xstrdup(envpath);
775 p = envpath;
776 while (p) {
777 char *dir = p;
778 p = strchr(p, ';');
779 if (p) *p++ = '\0';
780 if (*dir) { /* not earlier, catches series of ; */
781 ++n;
782 }
783 }
784 if (!n)
785 return NULL;
786
787 path = xmalloc((n+1)*sizeof(char *));
788 p = envpath;
789 i = 0;
790 do {
791 if (*p)
792 path[i++] = xstrdup(p);
793 p = p+strlen(p)+1;
794 } while (i < n);
795 path[i] = NULL;
796
797 free(envpath);
798
799 return path;
800 }
801
802 static void free_path_split(char **path)
803 {
804 char **p = path;
805
806 if (!path)
807 return;
808
809 while (*p)
810 free(*p++);
811 free(path);
812 }
813
814 /*
815 * exe_only means that we only want to detect .exe files, but not scripts
816 * (which do not have an extension)
817 */
818 static char *lookup_prog(const char *dir, const char *cmd, int isexe, int exe_only)
819 {
820 char path[MAX_PATH];
821 snprintf(path, sizeof(path), "%s\\%s.exe", dir, cmd);
822
823 if (!isexe && access(path, F_OK) == 0)
824 return xstrdup(path);
825 path[strlen(path)-4] = '\0';
826 if ((!exe_only || isexe) && access(path, F_OK) == 0)
827 if (!(GetFileAttributes(path) & FILE_ATTRIBUTE_DIRECTORY))
828 return xstrdup(path);
829 return NULL;
830 }
831
832 /*
833 * Determines the absolute path of cmd using the split path in path.
834 * If cmd contains a slash or backslash, no lookup is performed.
835 */
836 static char *path_lookup(const char *cmd, char **path, int exe_only)
837 {
838 char *prog = NULL;
839 int len = strlen(cmd);
840 int isexe = len >= 4 && !strcasecmp(cmd+len-4, ".exe");
841
842 if (strchr(cmd, '/') || strchr(cmd, '\\'))
843 prog = xstrdup(cmd);
844
845 while (!prog && *path)
846 prog = lookup_prog(*path++, cmd, isexe, exe_only);
847
848 return prog;
849 }
850
851 static int env_compare(const void *a, const void *b)
852 {
853 char *const *ea = a;
854 char *const *eb = b;
855 return strcasecmp(*ea, *eb);
856 }
857
858 struct pinfo_t {
859 struct pinfo_t *next;
860 pid_t pid;
861 HANDLE proc;
862 } pinfo_t;
863 struct pinfo_t *pinfo = NULL;
864 CRITICAL_SECTION pinfo_cs;
865
866 static pid_t mingw_spawnve_fd(const char *cmd, const char **argv, char **env,
867 const char *dir,
868 int prepend_cmd, int fhin, int fhout, int fherr)
869 {
870 STARTUPINFO si;
871 PROCESS_INFORMATION pi;
872 struct strbuf envblk, args;
873 unsigned flags;
874 BOOL ret;
875
876 /* Determine whether or not we are associated to a console */
877 HANDLE cons = CreateFile("CONOUT$", GENERIC_WRITE,
878 FILE_SHARE_WRITE, NULL, OPEN_EXISTING,
879 FILE_ATTRIBUTE_NORMAL, NULL);
880 if (cons == INVALID_HANDLE_VALUE) {
881 /* There is no console associated with this process.
882 * Since the child is a console process, Windows
883 * would normally create a console window. But
884 * since we'll be redirecting std streams, we do
885 * not need the console.
886 * It is necessary to use DETACHED_PROCESS
887 * instead of CREATE_NO_WINDOW to make ssh
888 * recognize that it has no console.
889 */
890 flags = DETACHED_PROCESS;
891 } else {
892 /* There is already a console. If we specified
893 * DETACHED_PROCESS here, too, Windows would
894 * disassociate the child from the console.
895 * The same is true for CREATE_NO_WINDOW.
896 * Go figure!
897 */
898 flags = 0;
899 CloseHandle(cons);
900 }
901 memset(&si, 0, sizeof(si));
902 si.cb = sizeof(si);
903 si.dwFlags = STARTF_USESTDHANDLES;
904 si.hStdInput = (HANDLE) _get_osfhandle(fhin);
905 si.hStdOutput = (HANDLE) _get_osfhandle(fhout);
906 si.hStdError = (HANDLE) _get_osfhandle(fherr);
907
908 /* concatenate argv, quoting args as we go */
909 strbuf_init(&args, 0);
910 if (prepend_cmd) {
911 char *quoted = (char *)quote_arg(cmd);
912 strbuf_addstr(&args, quoted);
913 if (quoted != cmd)
914 free(quoted);
915 }
916 for (; *argv; argv++) {
917 char *quoted = (char *)quote_arg(*argv);
918 if (*args.buf)
919 strbuf_addch(&args, ' ');
920 strbuf_addstr(&args, quoted);
921 if (quoted != *argv)
922 free(quoted);
923 }
924
925 if (env) {
926 int count = 0;
927 char **e, **sorted_env;
928
929 for (e = env; *e; e++)
930 count++;
931
932 /* environment must be sorted */
933 sorted_env = xmalloc(sizeof(*sorted_env) * (count + 1));
934 memcpy(sorted_env, env, sizeof(*sorted_env) * (count + 1));
935 qsort(sorted_env, count, sizeof(*sorted_env), env_compare);
936
937 strbuf_init(&envblk, 0);
938 for (e = sorted_env; *e; e++) {
939 strbuf_addstr(&envblk, *e);
940 strbuf_addch(&envblk, '\0');
941 }
942 free(sorted_env);
943 }
944
945 memset(&pi, 0, sizeof(pi));
946 ret = CreateProcess(cmd, args.buf, NULL, NULL, TRUE, flags,
947 env ? envblk.buf : NULL, dir, &si, &pi);
948
949 if (env)
950 strbuf_release(&envblk);
951 strbuf_release(&args);
952
953 if (!ret) {
954 errno = ENOENT;
955 return -1;
956 }
957 CloseHandle(pi.hThread);
958
959 /*
960 * The process ID is the human-readable identifier of the process
961 * that we want to present in log and error messages. The handle
962 * is not useful for this purpose. But we cannot close it, either,
963 * because it is not possible to turn a process ID into a process
964 * handle after the process terminated.
965 * Keep the handle in a list for waitpid.
966 */
967 EnterCriticalSection(&pinfo_cs);
968 {
969 struct pinfo_t *info = xmalloc(sizeof(struct pinfo_t));
970 info->pid = pi.dwProcessId;
971 info->proc = pi.hProcess;
972 info->next = pinfo;
973 pinfo = info;
974 }
975 LeaveCriticalSection(&pinfo_cs);
976
977 return (pid_t)pi.dwProcessId;
978 }
979
980 static pid_t mingw_spawnve(const char *cmd, const char **argv, char **env,
981 int prepend_cmd)
982 {
983 return mingw_spawnve_fd(cmd, argv, env, NULL, prepend_cmd, 0, 1, 2);
984 }
985
986 pid_t mingw_spawnvpe(const char *cmd, const char **argv, char **env,
987 const char *dir,
988 int fhin, int fhout, int fherr)
989 {
990 pid_t pid;
991 char **path = get_path_split();
992 char *prog = path_lookup(cmd, path, 0);
993
994 if (!prog) {
995 errno = ENOENT;
996 pid = -1;
997 }
998 else {
999 const char *interpr = parse_interpreter(prog);
1000
1001 if (interpr) {
1002 const char *argv0 = argv[0];
1003 char *iprog = path_lookup(interpr, path, 1);
1004 argv[0] = prog;
1005 if (!iprog) {
1006 errno = ENOENT;
1007 pid = -1;
1008 }
1009 else {
1010 pid = mingw_spawnve_fd(iprog, argv, env, dir, 1,
1011 fhin, fhout, fherr);
1012 free(iprog);
1013 }
1014 argv[0] = argv0;
1015 }
1016 else
1017 pid = mingw_spawnve_fd(prog, argv, env, dir, 0,
1018 fhin, fhout, fherr);
1019 free(prog);
1020 }
1021 free_path_split(path);
1022 return pid;
1023 }
1024
1025 static int try_shell_exec(const char *cmd, char *const *argv, char **env)
1026 {
1027 const char *interpr = parse_interpreter(cmd);
1028 char **path;
1029 char *prog;
1030 int pid = 0;
1031
1032 if (!interpr)
1033 return 0;
1034 path = get_path_split();
1035 prog = path_lookup(interpr, path, 1);
1036 if (prog) {
1037 int argc = 0;
1038 const char **argv2;
1039 while (argv[argc]) argc++;
1040 argv2 = xmalloc(sizeof(*argv) * (argc+1));
1041 argv2[0] = (char *)cmd; /* full path to the script file */
1042 memcpy(&argv2[1], &argv[1], sizeof(*argv) * argc);
1043 pid = mingw_spawnve(prog, argv2, env, 1);
1044 if (pid >= 0) {
1045 int status;
1046 if (waitpid(pid, &status, 0) < 0)
1047 status = 255;
1048 exit(status);
1049 }
1050 pid = 1; /* indicate that we tried but failed */
1051 free(prog);
1052 free(argv2);
1053 }
1054 free_path_split(path);
1055 return pid;
1056 }
1057
1058 static void mingw_execve(const char *cmd, char *const *argv, char *const *env)
1059 {
1060 /* check if git_command is a shell script */
1061 if (!try_shell_exec(cmd, argv, (char **)env)) {
1062 int pid, status;
1063
1064 pid = mingw_spawnve(cmd, (const char **)argv, (char **)env, 0);
1065 if (pid < 0)
1066 return;
1067 if (waitpid(pid, &status, 0) < 0)
1068 status = 255;
1069 exit(status);
1070 }
1071 }
1072
1073 void mingw_execvp(const char *cmd, char *const *argv)
1074 {
1075 char **path = get_path_split();
1076 char *prog = path_lookup(cmd, path, 0);
1077
1078 if (prog) {
1079 mingw_execve(prog, argv, environ);
1080 free(prog);
1081 } else
1082 errno = ENOENT;
1083
1084 free_path_split(path);
1085 }
1086
1087 void mingw_execv(const char *cmd, char *const *argv)
1088 {
1089 mingw_execve(cmd, argv, environ);
1090 }
1091
1092 int mingw_kill(pid_t pid, int sig)
1093 {
1094 if (pid > 0 && sig == SIGTERM) {
1095 HANDLE h = OpenProcess(PROCESS_TERMINATE, FALSE, pid);
1096
1097 if (TerminateProcess(h, -1)) {
1098 CloseHandle(h);
1099 return 0;
1100 }
1101
1102 errno = err_win_to_posix(GetLastError());
1103 CloseHandle(h);
1104 return -1;
1105 }
1106
1107 errno = EINVAL;
1108 return -1;
1109 }
1110
1111 static char **copy_environ(void)
1112 {
1113 char **env;
1114 int i = 0;
1115 while (environ[i])
1116 i++;
1117 env = xmalloc((i+1)*sizeof(*env));
1118 for (i = 0; environ[i]; i++)
1119 env[i] = xstrdup(environ[i]);
1120 env[i] = NULL;
1121 return env;
1122 }
1123
1124 void free_environ(char **env)
1125 {
1126 int i;
1127 for (i = 0; env[i]; i++)
1128 free(env[i]);
1129 free(env);
1130 }
1131
1132 static int lookup_env(char **env, const char *name, size_t nmln)
1133 {
1134 int i;
1135
1136 for (i = 0; env[i]; i++) {
1137 if (0 == strncmp(env[i], name, nmln)
1138 && '=' == env[i][nmln])
1139 /* matches */
1140 return i;
1141 }
1142 return -1;
1143 }
1144
1145 /*
1146 * If name contains '=', then sets the variable, otherwise it unsets it
1147 */
1148 static char **env_setenv(char **env, const char *name)
1149 {
1150 char *eq = strchrnul(name, '=');
1151 int i = lookup_env(env, name, eq-name);
1152
1153 if (i < 0) {
1154 if (*eq) {
1155 for (i = 0; env[i]; i++)
1156 ;
1157 env = xrealloc(env, (i+2)*sizeof(*env));
1158 env[i] = xstrdup(name);
1159 env[i+1] = NULL;
1160 }
1161 }
1162 else {
1163 free(env[i]);
1164 if (*eq)
1165 env[i] = xstrdup(name);
1166 else
1167 for (; env[i]; i++)
1168 env[i] = env[i+1];
1169 }
1170 return env;
1171 }
1172
1173 /*
1174 * Copies global environ and adjusts variables as specified by vars.
1175 */
1176 char **make_augmented_environ(const char *const *vars)
1177 {
1178 char **env = copy_environ();
1179
1180 while (*vars)
1181 env = env_setenv(env, *vars++);
1182 return env;
1183 }
1184
1185 #undef getenv
1186 char *mingw_getenv(const char *name)
1187 {
1188 char *result = getenv(name);
1189 if (!result && !strcmp(name, "TMPDIR")) {
1190 /* on Windows it is TMP and TEMP */
1191 result = getenv("TMP");
1192 if (!result)
1193 result = getenv("TEMP");
1194 }
1195 else if (!result && !strcmp(name, "TERM")) {
1196 /* simulate TERM to enable auto-color (see color.c) */
1197 result = "winansi";
1198 }
1199 return result;
1200 }
1201
1202 /*
1203 * Note, this isn't a complete replacement for getaddrinfo. It assumes
1204 * that service contains a numerical port, or that it is null. It
1205 * does a simple search using gethostbyname, and returns one IPv4 host
1206 * if one was found.
1207 */
1208 static int WSAAPI getaddrinfo_stub(const char *node, const char *service,
1209 const struct addrinfo *hints,
1210 struct addrinfo **res)
1211 {
1212 struct hostent *h = NULL;
1213 struct addrinfo *ai;
1214 struct sockaddr_in *sin;
1215
1216 if (node) {
1217 h = gethostbyname(node);
1218 if (!h)
1219 return WSAGetLastError();
1220 }
1221
1222 ai = xmalloc(sizeof(struct addrinfo));
1223 *res = ai;
1224 ai->ai_flags = 0;
1225 ai->ai_family = AF_INET;
1226 ai->ai_socktype = hints ? hints->ai_socktype : 0;
1227 switch (ai->ai_socktype) {
1228 case SOCK_STREAM:
1229 ai->ai_protocol = IPPROTO_TCP;
1230 break;
1231 case SOCK_DGRAM:
1232 ai->ai_protocol = IPPROTO_UDP;
1233 break;
1234 default:
1235 ai->ai_protocol = 0;
1236 break;
1237 }
1238 ai->ai_addrlen = sizeof(struct sockaddr_in);
1239 if (hints && (hints->ai_flags & AI_CANONNAME))
1240 ai->ai_canonname = h ? xstrdup(h->h_name) : NULL;
1241 else
1242 ai->ai_canonname = NULL;
1243
1244 sin = xmalloc(ai->ai_addrlen);
1245 memset(sin, 0, ai->ai_addrlen);
1246 sin->sin_family = AF_INET;
1247 /* Note: getaddrinfo is supposed to allow service to be a string,
1248 * which should be looked up using getservbyname. This is
1249 * currently not implemented */
1250 if (service)
1251 sin->sin_port = htons(atoi(service));
1252 if (h)
1253 sin->sin_addr = *(struct in_addr *)h->h_addr;
1254 else if (hints && (hints->ai_flags & AI_PASSIVE))
1255 sin->sin_addr.s_addr = INADDR_ANY;
1256 else
1257 sin->sin_addr.s_addr = INADDR_LOOPBACK;
1258 ai->ai_addr = (struct sockaddr *)sin;
1259 ai->ai_next = 0;
1260 return 0;
1261 }
1262
1263 static void WSAAPI freeaddrinfo_stub(struct addrinfo *res)
1264 {
1265 free(res->ai_canonname);
1266 free(res->ai_addr);
1267 free(res);
1268 }
1269
1270 static int WSAAPI getnameinfo_stub(const struct sockaddr *sa, socklen_t salen,
1271 char *host, DWORD hostlen,
1272 char *serv, DWORD servlen, int flags)
1273 {
1274 const struct sockaddr_in *sin = (const struct sockaddr_in *)sa;
1275 if (sa->sa_family != AF_INET)
1276 return EAI_FAMILY;
1277 if (!host && !serv)
1278 return EAI_NONAME;
1279
1280 if (host && hostlen > 0) {
1281 struct hostent *ent = NULL;
1282 if (!(flags & NI_NUMERICHOST))
1283 ent = gethostbyaddr((const char *)&sin->sin_addr,
1284 sizeof(sin->sin_addr), AF_INET);
1285
1286 if (ent)
1287 snprintf(host, hostlen, "%s", ent->h_name);
1288 else if (flags & NI_NAMEREQD)
1289 return EAI_NONAME;
1290 else
1291 snprintf(host, hostlen, "%s", inet_ntoa(sin->sin_addr));
1292 }
1293
1294 if (serv && servlen > 0) {
1295 struct servent *ent = NULL;
1296 if (!(flags & NI_NUMERICSERV))
1297 ent = getservbyport(sin->sin_port,
1298 flags & NI_DGRAM ? "udp" : "tcp");
1299
1300 if (ent)
1301 snprintf(serv, servlen, "%s", ent->s_name);
1302 else
1303 snprintf(serv, servlen, "%d", ntohs(sin->sin_port));
1304 }
1305
1306 return 0;
1307 }
1308
1309 static HMODULE ipv6_dll = NULL;
1310 static void (WSAAPI *ipv6_freeaddrinfo)(struct addrinfo *res);
1311 static int (WSAAPI *ipv6_getaddrinfo)(const char *node, const char *service,
1312 const struct addrinfo *hints,
1313 struct addrinfo **res);
1314 static int (WSAAPI *ipv6_getnameinfo)(const struct sockaddr *sa, socklen_t salen,
1315 char *host, DWORD hostlen,
1316 char *serv, DWORD servlen, int flags);
1317 /*
1318 * gai_strerror is an inline function in the ws2tcpip.h header, so we
1319 * don't need to try to load that one dynamically.
1320 */
1321
1322 static void socket_cleanup(void)
1323 {
1324 WSACleanup();
1325 if (ipv6_dll)
1326 FreeLibrary(ipv6_dll);
1327 ipv6_dll = NULL;
1328 ipv6_freeaddrinfo = freeaddrinfo_stub;
1329 ipv6_getaddrinfo = getaddrinfo_stub;
1330 ipv6_getnameinfo = getnameinfo_stub;
1331 }
1332
1333 static void ensure_socket_initialization(void)
1334 {
1335 WSADATA wsa;
1336 static int initialized = 0;
1337 const char *libraries[] = { "ws2_32.dll", "wship6.dll", NULL };
1338 const char **name;
1339
1340 if (initialized)
1341 return;
1342
1343 if (WSAStartup(MAKEWORD(2,2), &wsa))
1344 die("unable to initialize winsock subsystem, error %d",
1345 WSAGetLastError());
1346
1347 for (name = libraries; *name; name++) {
1348 ipv6_dll = LoadLibrary(*name);
1349 if (!ipv6_dll)
1350 continue;
1351
1352 ipv6_freeaddrinfo = (void (WSAAPI *)(struct addrinfo *))
1353 GetProcAddress(ipv6_dll, "freeaddrinfo");
1354 ipv6_getaddrinfo = (int (WSAAPI *)(const char *, const char *,
1355 const struct addrinfo *,
1356 struct addrinfo **))
1357 GetProcAddress(ipv6_dll, "getaddrinfo");
1358 ipv6_getnameinfo = (int (WSAAPI *)(const struct sockaddr *,
1359 socklen_t, char *, DWORD,
1360 char *, DWORD, int))
1361 GetProcAddress(ipv6_dll, "getnameinfo");
1362 if (!ipv6_freeaddrinfo || !ipv6_getaddrinfo || !ipv6_getnameinfo) {
1363 FreeLibrary(ipv6_dll);
1364 ipv6_dll = NULL;
1365 } else
1366 break;
1367 }
1368 if (!ipv6_freeaddrinfo || !ipv6_getaddrinfo || !ipv6_getnameinfo) {
1369 ipv6_freeaddrinfo = freeaddrinfo_stub;
1370 ipv6_getaddrinfo = getaddrinfo_stub;
1371 ipv6_getnameinfo = getnameinfo_stub;
1372 }
1373
1374 atexit(socket_cleanup);
1375 initialized = 1;
1376 }
1377
1378 #undef gethostname
1379 int mingw_gethostname(char *name, int namelen)
1380 {
1381 ensure_socket_initialization();
1382 return gethostname(name, namelen);
1383 }
1384
1385 #undef gethostbyname
1386 struct hostent *mingw_gethostbyname(const char *host)
1387 {
1388 ensure_socket_initialization();
1389 return gethostbyname(host);
1390 }
1391
1392 void mingw_freeaddrinfo(struct addrinfo *res)
1393 {
1394 ipv6_freeaddrinfo(res);
1395 }
1396
1397 int mingw_getaddrinfo(const char *node, const char *service,
1398 const struct addrinfo *hints, struct addrinfo **res)
1399 {
1400 ensure_socket_initialization();
1401 return ipv6_getaddrinfo(node, service, hints, res);
1402 }
1403
1404 int mingw_getnameinfo(const struct sockaddr *sa, socklen_t salen,
1405 char *host, DWORD hostlen, char *serv, DWORD servlen,
1406 int flags)
1407 {
1408 ensure_socket_initialization();
1409 return ipv6_getnameinfo(sa, salen, host, hostlen, serv, servlen, flags);
1410 }
1411
1412 int mingw_socket(int domain, int type, int protocol)
1413 {
1414 int sockfd;
1415 SOCKET s;
1416
1417 ensure_socket_initialization();
1418 s = WSASocket(domain, type, protocol, NULL, 0, 0);
1419 if (s == INVALID_SOCKET) {
1420 /*
1421 * WSAGetLastError() values are regular BSD error codes
1422 * biased by WSABASEERR.
1423 * However, strerror() does not know about networking
1424 * specific errors, which are values beginning at 38 or so.
1425 * Therefore, we choose to leave the biased error code
1426 * in errno so that _if_ someone looks up the code somewhere,
1427 * then it is at least the number that are usually listed.
1428 */
1429 errno = WSAGetLastError();
1430 return -1;
1431 }
1432 /* convert into a file descriptor */
1433 if ((sockfd = _open_osfhandle(s, O_RDWR|O_BINARY)) < 0) {
1434 closesocket(s);
1435 return error("unable to make a socket file descriptor: %s",
1436 strerror(errno));
1437 }
1438 return sockfd;
1439 }
1440
1441 #undef connect
1442 int mingw_connect(int sockfd, struct sockaddr *sa, size_t sz)
1443 {
1444 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
1445 return connect(s, sa, sz);
1446 }
1447
1448 #undef bind
1449 int mingw_bind(int sockfd, struct sockaddr *sa, size_t sz)
1450 {
1451 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
1452 return bind(s, sa, sz);
1453 }
1454
1455 #undef setsockopt
1456 int mingw_setsockopt(int sockfd, int lvl, int optname, void *optval, int optlen)
1457 {
1458 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
1459 return setsockopt(s, lvl, optname, (const char*)optval, optlen);
1460 }
1461
1462 #undef shutdown
1463 int mingw_shutdown(int sockfd, int how)
1464 {
1465 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
1466 return shutdown(s, how);
1467 }
1468
1469 #undef listen
1470 int mingw_listen(int sockfd, int backlog)
1471 {
1472 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
1473 return listen(s, backlog);
1474 }
1475
1476 #undef accept
1477 int mingw_accept(int sockfd1, struct sockaddr *sa, socklen_t *sz)
1478 {
1479 int sockfd2;
1480
1481 SOCKET s1 = (SOCKET)_get_osfhandle(sockfd1);
1482 SOCKET s2 = accept(s1, sa, sz);
1483
1484 /* convert into a file descriptor */
1485 if ((sockfd2 = _open_osfhandle(s2, O_RDWR|O_BINARY)) < 0) {
1486 int err = errno;
1487 closesocket(s2);
1488 return error("unable to make a socket file descriptor: %s",
1489 strerror(err));
1490 }
1491 return sockfd2;
1492 }
1493
1494 #undef rename
1495 int mingw_rename(const char *pold, const char *pnew)
1496 {
1497 DWORD attrs, gle;
1498 int tries = 0;
1499
1500 /*
1501 * Try native rename() first to get errno right.
1502 * It is based on MoveFile(), which cannot overwrite existing files.
1503 */
1504 if (!rename(pold, pnew))
1505 return 0;
1506 if (errno != EEXIST)
1507 return -1;
1508 repeat:
1509 if (MoveFileEx(pold, pnew, MOVEFILE_REPLACE_EXISTING))
1510 return 0;
1511 /* TODO: translate more errors */
1512 gle = GetLastError();
1513 if (gle == ERROR_ACCESS_DENIED &&
1514 (attrs = GetFileAttributes(pnew)) != INVALID_FILE_ATTRIBUTES) {
1515 if (attrs & FILE_ATTRIBUTE_DIRECTORY) {
1516 errno = EISDIR;
1517 return -1;
1518 }
1519 if ((attrs & FILE_ATTRIBUTE_READONLY) &&
1520 SetFileAttributes(pnew, attrs & ~FILE_ATTRIBUTE_READONLY)) {
1521 if (MoveFileEx(pold, pnew, MOVEFILE_REPLACE_EXISTING))
1522 return 0;
1523 gle = GetLastError();
1524 /* revert file attributes on failure */
1525 SetFileAttributes(pnew, attrs);
1526 }
1527 }
1528 if (tries < ARRAY_SIZE(delay) && gle == ERROR_ACCESS_DENIED) {
1529 /*
1530 * We assume that some other process had the source or
1531 * destination file open at the wrong moment and retry.
1532 * In order to give the other process a higher chance to
1533 * complete its operation, we give up our time slice now.
1534 * If we have to retry again, we do sleep a bit.
1535 */
1536 Sleep(delay[tries]);
1537 tries++;
1538 goto repeat;
1539 }
1540 if (gle == ERROR_ACCESS_DENIED &&
1541 ask_yes_no_if_possible("Rename from '%s' to '%s' failed. "
1542 "Should I try again?", pold, pnew))
1543 goto repeat;
1544
1545 errno = EACCES;
1546 return -1;
1547 }
1548
1549 /*
1550 * Note that this doesn't return the actual pagesize, but
1551 * the allocation granularity. If future Windows specific git code
1552 * needs the real getpagesize function, we need to find another solution.
1553 */
1554 int mingw_getpagesize(void)
1555 {
1556 SYSTEM_INFO si;
1557 GetSystemInfo(&si);
1558 return si.dwAllocationGranularity;
1559 }
1560
1561 struct passwd *getpwuid(int uid)
1562 {
1563 static char user_name[100];
1564 static struct passwd p;
1565
1566 DWORD len = sizeof(user_name);
1567 if (!GetUserName(user_name, &len))
1568 return NULL;
1569 p.pw_name = user_name;
1570 p.pw_gecos = "unknown";
1571 p.pw_dir = NULL;
1572 return &p;
1573 }
1574
1575 static HANDLE timer_event;
1576 static HANDLE timer_thread;
1577 static int timer_interval;
1578 static int one_shot;
1579 static sig_handler_t timer_fn = SIG_DFL;
1580
1581 /* The timer works like this:
1582 * The thread, ticktack(), is a trivial routine that most of the time
1583 * only waits to receive the signal to terminate. The main thread tells
1584 * the thread to terminate by setting the timer_event to the signalled
1585 * state.
1586 * But ticktack() interrupts the wait state after the timer's interval
1587 * length to call the signal handler.
1588 */
1589
1590 static unsigned __stdcall ticktack(void *dummy)
1591 {
1592 while (WaitForSingleObject(timer_event, timer_interval) == WAIT_TIMEOUT) {
1593 if (timer_fn == SIG_DFL)
1594 die("Alarm");
1595 if (timer_fn != SIG_IGN)
1596 timer_fn(SIGALRM);
1597 if (one_shot)
1598 break;
1599 }
1600 return 0;
1601 }
1602
1603 static int start_timer_thread(void)
1604 {
1605 timer_event = CreateEvent(NULL, FALSE, FALSE, NULL);
1606 if (timer_event) {
1607 timer_thread = (HANDLE) _beginthreadex(NULL, 0, ticktack, NULL, 0, NULL);
1608 if (!timer_thread )
1609 return errno = ENOMEM,
1610 error("cannot start timer thread");
1611 } else
1612 return errno = ENOMEM,
1613 error("cannot allocate resources for timer");
1614 return 0;
1615 }
1616
1617 static void stop_timer_thread(void)
1618 {
1619 if (timer_event)
1620 SetEvent(timer_event); /* tell thread to terminate */
1621 if (timer_thread) {
1622 int rc = WaitForSingleObject(timer_thread, 1000);
1623 if (rc == WAIT_TIMEOUT)
1624 error("timer thread did not terminate timely");
1625 else if (rc != WAIT_OBJECT_0)
1626 error("waiting for timer thread failed: %lu",
1627 GetLastError());
1628 CloseHandle(timer_thread);
1629 }
1630 if (timer_event)
1631 CloseHandle(timer_event);
1632 timer_event = NULL;
1633 timer_thread = NULL;
1634 }
1635
1636 static inline int is_timeval_eq(const struct timeval *i1, const struct timeval *i2)
1637 {
1638 return i1->tv_sec == i2->tv_sec && i1->tv_usec == i2->tv_usec;
1639 }
1640
1641 int setitimer(int type, struct itimerval *in, struct itimerval *out)
1642 {
1643 static const struct timeval zero;
1644 static int atexit_done;
1645
1646 if (out != NULL)
1647 return errno = EINVAL,
1648 error("setitimer param 3 != NULL not implemented");
1649 if (!is_timeval_eq(&in->it_interval, &zero) &&
1650 !is_timeval_eq(&in->it_interval, &in->it_value))
1651 return errno = EINVAL,
1652 error("setitimer: it_interval must be zero or eq it_value");
1653
1654 if (timer_thread)
1655 stop_timer_thread();
1656
1657 if (is_timeval_eq(&in->it_value, &zero) &&
1658 is_timeval_eq(&in->it_interval, &zero))
1659 return 0;
1660
1661 timer_interval = in->it_value.tv_sec * 1000 + in->it_value.tv_usec / 1000;
1662 one_shot = is_timeval_eq(&in->it_interval, &zero);
1663 if (!atexit_done) {
1664 atexit(stop_timer_thread);
1665 atexit_done = 1;
1666 }
1667 return start_timer_thread();
1668 }
1669
1670 int sigaction(int sig, struct sigaction *in, struct sigaction *out)
1671 {
1672 if (sig != SIGALRM)
1673 return errno = EINVAL,
1674 error("sigaction only implemented for SIGALRM");
1675 if (out != NULL)
1676 return errno = EINVAL,
1677 error("sigaction: param 3 != NULL not implemented");
1678
1679 timer_fn = in->sa_handler;
1680 return 0;
1681 }
1682
1683 #undef signal
1684 sig_handler_t mingw_signal(int sig, sig_handler_t handler)
1685 {
1686 sig_handler_t old = timer_fn;
1687 if (sig != SIGALRM)
1688 return signal(sig, handler);
1689 timer_fn = handler;
1690 return old;
1691 }
1692
1693 static const char *make_backslash_path(const char *path)
1694 {
1695 static char buf[PATH_MAX + 1];
1696 char *c;
1697
1698 if (strlcpy(buf, path, PATH_MAX) >= PATH_MAX)
1699 die("Too long path: %.*s", 60, path);
1700
1701 for (c = buf; *c; c++) {
1702 if (*c == '/')
1703 *c = '\\';
1704 }
1705 return buf;
1706 }
1707
1708 void mingw_open_html(const char *unixpath)
1709 {
1710 const char *htmlpath = make_backslash_path(unixpath);
1711 typedef HINSTANCE (WINAPI *T)(HWND, const char *,
1712 const char *, const char *, const char *, INT);
1713 T ShellExecute;
1714 HMODULE shell32;
1715 int r;
1716
1717 shell32 = LoadLibrary("shell32.dll");
1718 if (!shell32)
1719 die("cannot load shell32.dll");
1720 ShellExecute = (T)GetProcAddress(shell32, "ShellExecuteA");
1721 if (!ShellExecute)
1722 die("cannot run browser");
1723
1724 printf("Launching default browser to display HTML ...\n");
1725 r = (int)ShellExecute(NULL, "open", htmlpath, NULL, "\\", SW_SHOWNORMAL);
1726 FreeLibrary(shell32);
1727 /* see the MSDN documentation referring to the result codes here */
1728 if (r <= 32) {
1729 die("failed to launch browser for %.*s", MAX_PATH, unixpath);
1730 }
1731 }
1732
1733 int link(const char *oldpath, const char *newpath)
1734 {
1735 typedef BOOL (WINAPI *T)(const char*, const char*, LPSECURITY_ATTRIBUTES);
1736 static T create_hard_link = NULL;
1737 if (!create_hard_link) {
1738 create_hard_link = (T) GetProcAddress(
1739 GetModuleHandle("kernel32.dll"), "CreateHardLinkA");
1740 if (!create_hard_link)
1741 create_hard_link = (T)-1;
1742 }
1743 if (create_hard_link == (T)-1) {
1744 errno = ENOSYS;
1745 return -1;
1746 }
1747 if (!create_hard_link(newpath, oldpath, NULL)) {
1748 errno = err_win_to_posix(GetLastError());
1749 return -1;
1750 }
1751 return 0;
1752 }
1753
1754 char *getpass(const char *prompt)
1755 {
1756 struct strbuf buf = STRBUF_INIT;
1757
1758 fputs(prompt, stderr);
1759 for (;;) {
1760 char c = _getch();
1761 if (c == '\r' || c == '\n')
1762 break;
1763 strbuf_addch(&buf, c);
1764 }
1765 fputs("\n", stderr);
1766 return strbuf_detach(&buf, NULL);
1767 }
1768
1769 pid_t waitpid(pid_t pid, int *status, int options)
1770 {
1771 HANDLE h = OpenProcess(SYNCHRONIZE | PROCESS_QUERY_INFORMATION,
1772 FALSE, pid);
1773 if (!h) {
1774 errno = ECHILD;
1775 return -1;
1776 }
1777
1778 if (pid > 0 && options & WNOHANG) {
1779 if (WAIT_OBJECT_0 != WaitForSingleObject(h, 0)) {
1780 CloseHandle(h);
1781 return 0;
1782 }
1783 options &= ~WNOHANG;
1784 }
1785
1786 if (options == 0) {
1787 struct pinfo_t **ppinfo;
1788 if (WaitForSingleObject(h, INFINITE) != WAIT_OBJECT_0) {
1789 CloseHandle(h);
1790 return 0;
1791 }
1792
1793 if (status)
1794 GetExitCodeProcess(h, (LPDWORD)status);
1795
1796 EnterCriticalSection(&pinfo_cs);
1797
1798 ppinfo = &pinfo;
1799 while (*ppinfo) {
1800 struct pinfo_t *info = *ppinfo;
1801 if (info->pid == pid) {
1802 CloseHandle(info->proc);
1803 *ppinfo = info->next;
1804 free(info);
1805 break;
1806 }
1807 ppinfo = &info->next;
1808 }
1809
1810 LeaveCriticalSection(&pinfo_cs);
1811
1812 CloseHandle(h);
1813 return pid;
1814 }
1815 CloseHandle(h);
1816
1817 errno = EINVAL;
1818 return -1;
1819 }
1820
1821 const char *get_windows_home_directory(void)
1822 {
1823 static const char *home_directory = NULL;
1824 struct strbuf buf = STRBUF_INIT;
1825
1826 if (home_directory)
1827 return home_directory;
1828
1829 home_directory = getenv("HOME");
1830 if (home_directory && *home_directory)
1831 return home_directory;
1832
1833 strbuf_addf(&buf, "%s/%s", getenv("HOMEDRIVE"), getenv("HOMEPATH"));
1834 home_directory = strbuf_detach(&buf, NULL);
1835
1836 return home_directory;
1837 }
1838
1839 int mingw_offset_1st_component(const char *path)
1840 {
1841 int offset = 0;
1842 if (has_dos_drive_prefix(path))
1843 offset = 2;
1844
1845 /* unc paths */
1846 else if (is_dir_sep(path[0]) && is_dir_sep(path[1])) {
1847
1848 /* skip server name */
1849 char *pos = strpbrk(path + 2, "\\/");
1850 if (!pos)
1851 return 0; /* Error: malformed unc path */
1852
1853 do {
1854 pos++;
1855 } while (*pos && !is_dir_sep(*pos));
1856
1857 offset = pos - path;
1858 }
1859
1860 return offset + is_dir_sep(path[offset]);
1861 }
1862
1863 /*
1864 * Disable MSVCRT command line wildcard expansion (__getmainargs called from
1865 * mingw startup code, see init.c in mingw runtime).
1866 */
1867 int _CRT_glob = 0;
1868
1869 void mingw_startup()
1870 {
1871 /* copy executable name to argv[0] */
1872 __argv[0] = xstrdup(_pgmptr);
1873
1874 /* initialize critical section for waitpid pinfo_t list */
1875 InitializeCriticalSection(&pinfo_cs);
1876
1877 /* set up default file mode and file modes for stdin/out/err */
1878 _fmode = _O_BINARY;
1879 _setmode(_fileno(stdin), _O_BINARY);
1880 _setmode(_fileno(stdout), _O_BINARY);
1881 _setmode(_fileno(stderr), _O_BINARY);
1882 }
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