completion: add a test for __git_remotes() helper function
[git.git] / compat / mingw.c
blob70f3191a4f19f10a156d1f2c054943d5147ab049
1 #include "../git-compat-util.h"
2 #include "win32.h"
3 #include <conio.h>
4 #include <wchar.h>
5 #include "../strbuf.h"
6 #include "../run-command.h"
7 #include "../cache.h"
9 static const int delay[] = { 0, 1, 10, 20, 40 };
11 int err_win_to_posix(DWORD winerr)
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;
121 return error;
124 static inline int is_file_in_use_error(DWORD errcode)
126 switch (errcode) {
127 case ERROR_SHARING_VIOLATION:
128 case ERROR_ACCESS_DENIED:
129 return 1;
132 return 0;
135 static int read_yes_no_answer(void)
137 char answer[1024];
139 if (fgets(answer, sizeof(answer), stdin)) {
140 size_t answer_len = strlen(answer);
141 int got_full_line = 0, c;
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;
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')
155 } else
156 /* we could not read, return the
157 * default answer which is no */
158 return 0;
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;
169 /* did not find an answer we understand */
170 return -1;
173 static int ask_yes_no_if_possible(const char *format, ...)
175 char question[4096];
176 const char *retry_hook[] = { NULL, NULL, NULL };
177 va_list args;
179 va_start(args, format);
180 vsnprintf(question, sizeof(question), format, args);
181 va_end(args);
183 if ((retry_hook[0] = mingw_getenv("GIT_ASK_YESNO"))) {
184 retry_hook[1] = question;
185 return !run_command_v_opt(retry_hook, 0);
188 if (!isatty(_fileno(stdin)) || !isatty(_fileno(stderr)))
189 return 0;
191 while (1) {
192 int answer;
193 fprintf(stderr, "%s (y/n) ", question);
195 if ((answer = read_yes_no_answer()) >= 0)
196 return answer;
198 fprintf(stderr, "Sorry, I did not understand your answer. "
199 "Please type 'y' or 'n'\n");
203 int mingw_unlink(const char *pathname)
205 int ret, tries = 0;
206 wchar_t wpathname[MAX_PATH];
207 if (xutftowcs_path(wpathname, pathname) < 0)
208 return -1;
210 /* read-only files cannot be removed */
211 _wchmod(wpathname, 0666);
212 while ((ret = _wunlink(wpathname)) == -1 && tries < ARRAY_SIZE(delay)) {
213 if (!is_file_in_use_error(GetLastError()))
214 break;
216 * We assume that some other process had the source or
217 * destination file open at the wrong moment and retry.
218 * In order to give the other process a higher chance to
219 * complete its operation, we give up our time slice now.
220 * If we have to retry again, we do sleep a bit.
222 Sleep(delay[tries]);
223 tries++;
225 while (ret == -1 && is_file_in_use_error(GetLastError()) &&
226 ask_yes_no_if_possible("Unlink of file '%s' failed. "
227 "Should I try again?", pathname))
228 ret = _wunlink(wpathname);
229 return ret;
232 static int is_dir_empty(const wchar_t *wpath)
234 WIN32_FIND_DATAW findbuf;
235 HANDLE handle;
236 wchar_t wbuf[MAX_PATH + 2];
237 wcscpy(wbuf, wpath);
238 wcscat(wbuf, L"\\*");
239 handle = FindFirstFileW(wbuf, &findbuf);
240 if (handle == INVALID_HANDLE_VALUE)
241 return GetLastError() == ERROR_NO_MORE_FILES;
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;
250 FindClose(handle);
251 return 0;
254 int mingw_rmdir(const char *pathname)
256 int ret, tries = 0;
257 wchar_t wpathname[MAX_PATH];
258 if (xutftowcs_path(wpathname, pathname) < 0)
259 return -1;
261 while ((ret = _wrmdir(wpathname)) == -1 && tries < ARRAY_SIZE(delay)) {
262 if (!is_file_in_use_error(GetLastError()))
263 errno = err_win_to_posix(GetLastError());
264 if (errno != EACCES)
265 break;
266 if (!is_dir_empty(wpathname)) {
267 errno = ENOTEMPTY;
268 break;
271 * We assume that some other process had the source or
272 * destination file open at the wrong moment and retry.
273 * In order to give the other process a higher chance to
274 * complete its operation, we give up our time slice now.
275 * If we have to retry again, we do sleep a bit.
277 Sleep(delay[tries]);
278 tries++;
280 while (ret == -1 && errno == EACCES && is_file_in_use_error(GetLastError()) &&
281 ask_yes_no_if_possible("Deletion of directory '%s' failed. "
282 "Should I try again?", pathname))
283 ret = _wrmdir(wpathname);
284 return ret;
287 int mingw_mkdir(const char *path, int mode)
289 int ret;
290 wchar_t wpath[MAX_PATH];
291 if (xutftowcs_path(wpath, path) < 0)
292 return -1;
293 ret = _wmkdir(wpath);
294 return ret;
297 int mingw_open (const char *filename, int oflags, ...)
299 va_list args;
300 unsigned mode;
301 int fd;
302 wchar_t wfilename[MAX_PATH];
304 va_start(args, oflags);
305 mode = va_arg(args, int);
306 va_end(args);
308 if (filename && !strcmp(filename, "/dev/null"))
309 filename = "nul";
311 if (xutftowcs_path(wfilename, filename) < 0)
312 return -1;
313 fd = _wopen(wfilename, oflags, mode);
315 if (fd < 0 && (oflags & O_ACCMODE) != O_RDONLY && errno == EACCES) {
316 DWORD attrs = GetFileAttributesW(wfilename);
317 if (attrs != INVALID_FILE_ATTRIBUTES && (attrs & FILE_ATTRIBUTE_DIRECTORY))
318 errno = EISDIR;
320 return fd;
323 static BOOL WINAPI ctrl_ignore(DWORD type)
325 return TRUE;
328 #undef fgetc
329 int mingw_fgetc(FILE *stream)
331 int ch;
332 if (!isatty(_fileno(stream)))
333 return fgetc(stream);
335 SetConsoleCtrlHandler(ctrl_ignore, TRUE);
336 while (1) {
337 ch = fgetc(stream);
338 if (ch != EOF || GetLastError() != ERROR_OPERATION_ABORTED)
339 break;
341 /* Ctrl+C was pressed, simulate SIGINT and retry */
342 mingw_raise(SIGINT);
344 SetConsoleCtrlHandler(ctrl_ignore, FALSE);
345 return ch;
348 #undef fopen
349 FILE *mingw_fopen (const char *filename, const char *otype)
351 FILE *file;
352 wchar_t wfilename[MAX_PATH], wotype[4];
353 if (filename && !strcmp(filename, "/dev/null"))
354 filename = "nul";
355 if (xutftowcs_path(wfilename, filename) < 0 ||
356 xutftowcs(wotype, otype, ARRAY_SIZE(wotype)) < 0)
357 return NULL;
358 file = _wfopen(wfilename, wotype);
359 return file;
362 FILE *mingw_freopen (const char *filename, const char *otype, FILE *stream)
364 FILE *file;
365 wchar_t wfilename[MAX_PATH], wotype[4];
366 if (filename && !strcmp(filename, "/dev/null"))
367 filename = "nul";
368 if (xutftowcs_path(wfilename, filename) < 0 ||
369 xutftowcs(wotype, otype, ARRAY_SIZE(wotype)) < 0)
370 return NULL;
371 file = _wfreopen(wfilename, wotype, stream);
372 return file;
375 #undef fflush
376 int mingw_fflush(FILE *stream)
378 int ret = fflush(stream);
381 * write() is used behind the scenes of stdio output functions.
382 * Since git code does not check for errors after each stdio write
383 * operation, it can happen that write() is called by a later
384 * stdio function even if an earlier write() call failed. In the
385 * case of a pipe whose readable end was closed, only the first
386 * call to write() reports EPIPE on Windows. Subsequent write()
387 * calls report EINVAL. It is impossible to notice whether this
388 * fflush invocation triggered such a case, therefore, we have to
389 * catch all EINVAL errors whole-sale.
391 if (ret && errno == EINVAL)
392 errno = EPIPE;
394 return ret;
397 int mingw_access(const char *filename, int mode)
399 wchar_t wfilename[MAX_PATH];
400 if (xutftowcs_path(wfilename, filename) < 0)
401 return -1;
402 /* X_OK is not supported by the MSVCRT version */
403 return _waccess(wfilename, mode & ~X_OK);
406 int mingw_chdir(const char *dirname)
408 wchar_t wdirname[MAX_PATH];
409 if (xutftowcs_path(wdirname, dirname) < 0)
410 return -1;
411 return _wchdir(wdirname);
414 int mingw_chmod(const char *filename, int mode)
416 wchar_t wfilename[MAX_PATH];
417 if (xutftowcs_path(wfilename, filename) < 0)
418 return -1;
419 return _wchmod(wfilename, mode);
423 * The unit of FILETIME is 100-nanoseconds since January 1, 1601, UTC.
424 * Returns the 100-nanoseconds ("hekto nanoseconds") since the epoch.
426 static inline long long filetime_to_hnsec(const FILETIME *ft)
428 long long winTime = ((long long)ft->dwHighDateTime << 32) + ft->dwLowDateTime;
429 /* Windows to Unix Epoch conversion */
430 return winTime - 116444736000000000LL;
433 static inline time_t filetime_to_time_t(const FILETIME *ft)
435 return (time_t)(filetime_to_hnsec(ft) / 10000000);
438 /* We keep the do_lstat code in a separate function to avoid recursion.
439 * When a path ends with a slash, the stat will fail with ENOENT. In
440 * this case, we strip the trailing slashes and stat again.
442 * If follow is true then act like stat() and report on the link
443 * target. Otherwise report on the link itself.
445 static int do_lstat(int follow, const char *file_name, struct stat *buf)
447 WIN32_FILE_ATTRIBUTE_DATA fdata;
448 wchar_t wfilename[MAX_PATH];
449 if (xutftowcs_path(wfilename, file_name) < 0)
450 return -1;
452 if (GetFileAttributesExW(wfilename, GetFileExInfoStandard, &fdata)) {
453 buf->st_ino = 0;
454 buf->st_gid = 0;
455 buf->st_uid = 0;
456 buf->st_nlink = 1;
457 buf->st_mode = file_attr_to_st_mode(fdata.dwFileAttributes);
458 buf->st_size = fdata.nFileSizeLow |
459 (((off_t)fdata.nFileSizeHigh)<<32);
460 buf->st_dev = buf->st_rdev = 0; /* not used by Git */
461 buf->st_atime = filetime_to_time_t(&(fdata.ftLastAccessTime));
462 buf->st_mtime = filetime_to_time_t(&(fdata.ftLastWriteTime));
463 buf->st_ctime = filetime_to_time_t(&(fdata.ftCreationTime));
464 if (fdata.dwFileAttributes & FILE_ATTRIBUTE_REPARSE_POINT) {
465 WIN32_FIND_DATAW findbuf;
466 HANDLE handle = FindFirstFileW(wfilename, &findbuf);
467 if (handle != INVALID_HANDLE_VALUE) {
468 if ((findbuf.dwFileAttributes & FILE_ATTRIBUTE_REPARSE_POINT) &&
469 (findbuf.dwReserved0 == IO_REPARSE_TAG_SYMLINK)) {
470 if (follow) {
471 char buffer[MAXIMUM_REPARSE_DATA_BUFFER_SIZE];
472 buf->st_size = readlink(file_name, buffer, MAXIMUM_REPARSE_DATA_BUFFER_SIZE);
473 } else {
474 buf->st_mode = S_IFLNK;
476 buf->st_mode |= S_IREAD;
477 if (!(findbuf.dwFileAttributes & FILE_ATTRIBUTE_READONLY))
478 buf->st_mode |= S_IWRITE;
480 FindClose(handle);
483 return 0;
485 switch (GetLastError()) {
486 case ERROR_ACCESS_DENIED:
487 case ERROR_SHARING_VIOLATION:
488 case ERROR_LOCK_VIOLATION:
489 case ERROR_SHARING_BUFFER_EXCEEDED:
490 errno = EACCES;
491 break;
492 case ERROR_BUFFER_OVERFLOW:
493 errno = ENAMETOOLONG;
494 break;
495 case ERROR_NOT_ENOUGH_MEMORY:
496 errno = ENOMEM;
497 break;
498 default:
499 errno = ENOENT;
500 break;
502 return -1;
505 /* We provide our own lstat/fstat functions, since the provided
506 * lstat/fstat functions are so slow. These stat functions are
507 * tailored for Git's usage (read: fast), and are not meant to be
508 * complete. Note that Git stat()s are redirected to mingw_lstat()
509 * too, since Windows doesn't really handle symlinks that well.
511 static int do_stat_internal(int follow, const char *file_name, struct stat *buf)
513 int namelen;
514 char alt_name[PATH_MAX];
516 if (!do_lstat(follow, file_name, buf))
517 return 0;
519 /* if file_name ended in a '/', Windows returned ENOENT;
520 * try again without trailing slashes
522 if (errno != ENOENT)
523 return -1;
525 namelen = strlen(file_name);
526 if (namelen && file_name[namelen-1] != '/')
527 return -1;
528 while (namelen && file_name[namelen-1] == '/')
529 --namelen;
530 if (!namelen || namelen >= PATH_MAX)
531 return -1;
533 memcpy(alt_name, file_name, namelen);
534 alt_name[namelen] = 0;
535 return do_lstat(follow, alt_name, buf);
538 int mingw_lstat(const char *file_name, struct stat *buf)
540 return do_stat_internal(0, file_name, buf);
542 int mingw_stat(const char *file_name, struct stat *buf)
544 return do_stat_internal(1, file_name, buf);
547 int mingw_fstat(int fd, struct stat *buf)
549 HANDLE fh = (HANDLE)_get_osfhandle(fd);
550 BY_HANDLE_FILE_INFORMATION fdata;
552 if (fh == INVALID_HANDLE_VALUE) {
553 errno = EBADF;
554 return -1;
556 /* direct non-file handles to MS's fstat() */
557 if (GetFileType(fh) != FILE_TYPE_DISK)
558 return _fstati64(fd, buf);
560 if (GetFileInformationByHandle(fh, &fdata)) {
561 buf->st_ino = 0;
562 buf->st_gid = 0;
563 buf->st_uid = 0;
564 buf->st_nlink = 1;
565 buf->st_mode = file_attr_to_st_mode(fdata.dwFileAttributes);
566 buf->st_size = fdata.nFileSizeLow |
567 (((off_t)fdata.nFileSizeHigh)<<32);
568 buf->st_dev = buf->st_rdev = 0; /* not used by Git */
569 buf->st_atime = filetime_to_time_t(&(fdata.ftLastAccessTime));
570 buf->st_mtime = filetime_to_time_t(&(fdata.ftLastWriteTime));
571 buf->st_ctime = filetime_to_time_t(&(fdata.ftCreationTime));
572 return 0;
574 errno = EBADF;
575 return -1;
578 static inline void time_t_to_filetime(time_t t, FILETIME *ft)
580 long long winTime = t * 10000000LL + 116444736000000000LL;
581 ft->dwLowDateTime = winTime;
582 ft->dwHighDateTime = winTime >> 32;
585 int mingw_utime (const char *file_name, const struct utimbuf *times)
587 FILETIME mft, aft;
588 int fh, rc;
589 DWORD attrs;
590 wchar_t wfilename[MAX_PATH];
591 if (xutftowcs_path(wfilename, file_name) < 0)
592 return -1;
594 /* must have write permission */
595 attrs = GetFileAttributesW(wfilename);
596 if (attrs != INVALID_FILE_ATTRIBUTES &&
597 (attrs & FILE_ATTRIBUTE_READONLY)) {
598 /* ignore errors here; open() will report them */
599 SetFileAttributesW(wfilename, attrs & ~FILE_ATTRIBUTE_READONLY);
602 if ((fh = _wopen(wfilename, O_RDWR | O_BINARY)) < 0) {
603 rc = -1;
604 goto revert_attrs;
607 if (times) {
608 time_t_to_filetime(times->modtime, &mft);
609 time_t_to_filetime(times->actime, &aft);
610 } else {
611 GetSystemTimeAsFileTime(&mft);
612 aft = mft;
614 if (!SetFileTime((HANDLE)_get_osfhandle(fh), NULL, &aft, &mft)) {
615 errno = EINVAL;
616 rc = -1;
617 } else
618 rc = 0;
619 close(fh);
621 revert_attrs:
622 if (attrs != INVALID_FILE_ATTRIBUTES &&
623 (attrs & FILE_ATTRIBUTE_READONLY)) {
624 /* ignore errors again */
625 SetFileAttributesW(wfilename, attrs);
627 return rc;
630 unsigned int sleep (unsigned int seconds)
632 Sleep(seconds*1000);
633 return 0;
636 char *mingw_mktemp(char *template)
638 wchar_t wtemplate[MAX_PATH];
639 if (xutftowcs_path(wtemplate, template) < 0)
640 return NULL;
641 if (!_wmktemp(wtemplate))
642 return NULL;
643 if (xwcstoutf(template, wtemplate, strlen(template) + 1) < 0)
644 return NULL;
645 return template;
648 int mkstemp(char *template)
650 char *filename = mktemp(template);
651 if (filename == NULL)
652 return -1;
653 return open(filename, O_RDWR | O_CREAT, 0600);
656 int gettimeofday(struct timeval *tv, void *tz)
658 FILETIME ft;
659 long long hnsec;
661 GetSystemTimeAsFileTime(&ft);
662 hnsec = filetime_to_hnsec(&ft);
663 tv->tv_sec = hnsec / 10000000;
664 tv->tv_usec = (hnsec % 10000000) / 10;
665 return 0;
668 int pipe(int filedes[2])
670 HANDLE h[2];
672 /* this creates non-inheritable handles */
673 if (!CreatePipe(&h[0], &h[1], NULL, 8192)) {
674 errno = err_win_to_posix(GetLastError());
675 return -1;
677 filedes[0] = _open_osfhandle((int)h[0], O_NOINHERIT);
678 if (filedes[0] < 0) {
679 CloseHandle(h[0]);
680 CloseHandle(h[1]);
681 return -1;
683 filedes[1] = _open_osfhandle((int)h[1], O_NOINHERIT);
684 if (filedes[0] < 0) {
685 close(filedes[0]);
686 CloseHandle(h[1]);
687 return -1;
689 return 0;
692 struct tm *gmtime_r(const time_t *timep, struct tm *result)
694 /* gmtime() in MSVCRT.DLL is thread-safe, but not reentrant */
695 memcpy(result, gmtime(timep), sizeof(struct tm));
696 return result;
699 struct tm *localtime_r(const time_t *timep, struct tm *result)
701 /* localtime() in MSVCRT.DLL is thread-safe, but not reentrant */
702 memcpy(result, localtime(timep), sizeof(struct tm));
703 return result;
706 char *mingw_getcwd(char *pointer, int len)
708 int i;
709 wchar_t wpointer[MAX_PATH];
710 if (!_wgetcwd(wpointer, ARRAY_SIZE(wpointer)))
711 return NULL;
712 if (xwcstoutf(pointer, wpointer, len) < 0)
713 return NULL;
714 for (i = 0; pointer[i]; i++)
715 if (pointer[i] == '\\')
716 pointer[i] = '/';
717 return pointer;
721 * See http://msdn2.microsoft.com/en-us/library/17w5ykft(vs.71).aspx
722 * (Parsing C++ Command-Line Arguments)
724 static const char *quote_arg(const char *arg)
726 /* count chars to quote */
727 int len = 0, n = 0;
728 int force_quotes = 0;
729 char *q, *d;
730 const char *p = arg;
731 if (!*p) force_quotes = 1;
732 while (*p) {
733 if (isspace(*p) || *p == '*' || *p == '?' || *p == '{' || *p == '\'')
734 force_quotes = 1;
735 else if (*p == '"')
736 n++;
737 else if (*p == '\\') {
738 int count = 0;
739 while (*p == '\\') {
740 count++;
741 p++;
742 len++;
744 if (*p == '"')
745 n += count*2 + 1;
746 continue;
748 len++;
749 p++;
751 if (!force_quotes && n == 0)
752 return arg;
754 /* insert \ where necessary */
755 d = q = xmalloc(len+n+3);
756 *d++ = '"';
757 while (*arg) {
758 if (*arg == '"')
759 *d++ = '\\';
760 else if (*arg == '\\') {
761 int count = 0;
762 while (*arg == '\\') {
763 count++;
764 *d++ = *arg++;
766 if (*arg == '"') {
767 while (count-- > 0)
768 *d++ = '\\';
769 *d++ = '\\';
772 *d++ = *arg++;
774 *d++ = '"';
775 *d++ = 0;
776 return q;
779 static const char *parse_interpreter(const char *cmd)
781 static char buf[100];
782 char *p, *opt;
783 int n, fd;
785 /* don't even try a .exe */
786 n = strlen(cmd);
787 if (n >= 4 && !strcasecmp(cmd+n-4, ".exe"))
788 return NULL;
790 fd = open(cmd, O_RDONLY);
791 if (fd < 0)
792 return NULL;
793 n = read(fd, buf, sizeof(buf)-1);
794 close(fd);
795 if (n < 4) /* at least '#!/x' and not error */
796 return NULL;
798 if (buf[0] != '#' || buf[1] != '!')
799 return NULL;
800 buf[n] = '\0';
801 p = buf + strcspn(buf, "\r\n");
802 if (!*p)
803 return NULL;
805 *p = '\0';
806 if (!(p = strrchr(buf+2, '/')) && !(p = strrchr(buf+2, '\\')))
807 return NULL;
808 /* strip options */
809 if ((opt = strchr(p+1, ' ')))
810 *opt = '\0';
811 return p+1;
815 * Splits the PATH into parts.
817 static char **get_path_split(void)
819 char *p, **path, *envpath = mingw_getenv("PATH");
820 int i, n = 0;
822 if (!envpath || !*envpath)
823 return NULL;
825 envpath = xstrdup(envpath);
826 p = envpath;
827 while (p) {
828 char *dir = p;
829 p = strchr(p, ';');
830 if (p) *p++ = '\0';
831 if (*dir) { /* not earlier, catches series of ; */
832 ++n;
835 if (!n)
836 return NULL;
838 path = xmalloc((n+1)*sizeof(char *));
839 p = envpath;
840 i = 0;
841 do {
842 if (*p)
843 path[i++] = xstrdup(p);
844 p = p+strlen(p)+1;
845 } while (i < n);
846 path[i] = NULL;
848 free(envpath);
850 return path;
853 static void free_path_split(char **path)
855 char **p = path;
857 if (!path)
858 return;
860 while (*p)
861 free(*p++);
862 free(path);
866 * exe_only means that we only want to detect .exe files, but not scripts
867 * (which do not have an extension)
869 static char *lookup_prog(const char *dir, const char *cmd, int isexe, int exe_only)
871 char path[MAX_PATH];
872 snprintf(path, sizeof(path), "%s/%s.exe", dir, cmd);
874 if (!isexe && access(path, F_OK) == 0)
875 return xstrdup(path);
876 path[strlen(path)-4] = '\0';
877 if ((!exe_only || isexe) && access(path, F_OK) == 0)
878 if (!(GetFileAttributes(path) & FILE_ATTRIBUTE_DIRECTORY))
879 return xstrdup(path);
880 return NULL;
884 * Determines the absolute path of cmd using the split path in path.
885 * If cmd contains a slash or backslash, no lookup is performed.
887 static char *path_lookup(const char *cmd, char **path, int exe_only)
889 char *prog = NULL;
890 int len = strlen(cmd);
891 int isexe = len >= 4 && !strcasecmp(cmd+len-4, ".exe");
893 if (strchr(cmd, '/') || strchr(cmd, '\\'))
894 prog = xstrdup(cmd);
896 while (!prog && *path)
897 prog = lookup_prog(*path++, cmd, isexe, exe_only);
899 return prog;
902 static int do_putenv(char **env, const char *name, int size, int free_old);
904 /* used number of elements of environ array, including terminating NULL */
905 static int environ_size = 0;
906 /* allocated size of environ array, in bytes */
907 static int environ_alloc = 0;
910 * Create environment block suitable for CreateProcess. Merges current
911 * process environment and the supplied environment changes.
913 static wchar_t *make_environment_block(char **deltaenv)
915 wchar_t *wenvblk = NULL;
916 char **tmpenv;
917 int i = 0, size = environ_size, wenvsz = 0, wenvpos = 0;
919 while (deltaenv && deltaenv[i])
920 i++;
922 /* copy the environment, leaving space for changes */
923 tmpenv = xmalloc((size + i) * sizeof(char*));
924 memcpy(tmpenv, environ, size * sizeof(char*));
926 /* merge supplied environment changes into the temporary environment */
927 for (i = 0; deltaenv && deltaenv[i]; i++)
928 size = do_putenv(tmpenv, deltaenv[i], size, 0);
930 /* create environment block from temporary environment */
931 for (i = 0; tmpenv[i]; i++) {
932 size = 2 * strlen(tmpenv[i]) + 2; /* +2 for final \0 */
933 ALLOC_GROW(wenvblk, (wenvpos + size) * sizeof(wchar_t), wenvsz);
934 wenvpos += xutftowcs(&wenvblk[wenvpos], tmpenv[i], size) + 1;
936 /* add final \0 terminator */
937 wenvblk[wenvpos] = 0;
938 free(tmpenv);
939 return wenvblk;
942 struct pinfo_t {
943 struct pinfo_t *next;
944 pid_t pid;
945 HANDLE proc;
947 static struct pinfo_t *pinfo = NULL;
948 CRITICAL_SECTION pinfo_cs;
950 static pid_t mingw_spawnve_fd(const char *cmd, const char **argv, char **deltaenv,
951 const char *dir,
952 int prepend_cmd, int fhin, int fhout, int fherr)
954 STARTUPINFOW si;
955 PROCESS_INFORMATION pi;
956 struct strbuf args;
957 wchar_t wcmd[MAX_PATH], wdir[MAX_PATH], *wargs, *wenvblk = NULL;
958 unsigned flags = CREATE_UNICODE_ENVIRONMENT;
959 BOOL ret;
961 /* Determine whether or not we are associated to a console */
962 HANDLE cons = CreateFile("CONOUT$", GENERIC_WRITE,
963 FILE_SHARE_WRITE, NULL, OPEN_EXISTING,
964 FILE_ATTRIBUTE_NORMAL, NULL);
965 if (cons == INVALID_HANDLE_VALUE) {
966 /* There is no console associated with this process.
967 * Since the child is a console process, Windows
968 * would normally create a console window. But
969 * since we'll be redirecting std streams, we do
970 * not need the console.
971 * It is necessary to use DETACHED_PROCESS
972 * instead of CREATE_NO_WINDOW to make ssh
973 * recognize that it has no console.
975 flags |= DETACHED_PROCESS;
976 } else {
977 /* There is already a console. If we specified
978 * DETACHED_PROCESS here, too, Windows would
979 * disassociate the child from the console.
980 * The same is true for CREATE_NO_WINDOW.
981 * Go figure!
983 CloseHandle(cons);
985 memset(&si, 0, sizeof(si));
986 si.cb = sizeof(si);
987 si.dwFlags = STARTF_USESTDHANDLES;
988 si.hStdInput = winansi_get_osfhandle(fhin);
989 si.hStdOutput = winansi_get_osfhandle(fhout);
990 si.hStdError = winansi_get_osfhandle(fherr);
992 if (xutftowcs_path(wcmd, cmd) < 0)
993 return -1;
994 if (dir && xutftowcs_path(wdir, dir) < 0)
995 return -1;
997 /* concatenate argv, quoting args as we go */
998 strbuf_init(&args, 0);
999 if (prepend_cmd) {
1000 char *quoted = (char *)quote_arg(cmd);
1001 strbuf_addstr(&args, quoted);
1002 if (quoted != cmd)
1003 free(quoted);
1005 for (; *argv; argv++) {
1006 char *quoted = (char *)quote_arg(*argv);
1007 if (*args.buf)
1008 strbuf_addch(&args, ' ');
1009 strbuf_addstr(&args, quoted);
1010 if (quoted != *argv)
1011 free(quoted);
1014 wargs = xmalloc((2 * args.len + 1) * sizeof(wchar_t));
1015 xutftowcs(wargs, args.buf, 2 * args.len + 1);
1016 strbuf_release(&args);
1018 wenvblk = make_environment_block(deltaenv);
1020 memset(&pi, 0, sizeof(pi));
1021 ret = CreateProcessW(wcmd, wargs, NULL, NULL, TRUE, flags,
1022 wenvblk, dir ? wdir : NULL, &si, &pi);
1024 free(wenvblk);
1025 free(wargs);
1027 if (!ret) {
1028 errno = ENOENT;
1029 return -1;
1031 CloseHandle(pi.hThread);
1034 * The process ID is the human-readable identifier of the process
1035 * that we want to present in log and error messages. The handle
1036 * is not useful for this purpose. But we cannot close it, either,
1037 * because it is not possible to turn a process ID into a process
1038 * handle after the process terminated.
1039 * Keep the handle in a list for waitpid.
1041 EnterCriticalSection(&pinfo_cs);
1043 struct pinfo_t *info = xmalloc(sizeof(struct pinfo_t));
1044 info->pid = pi.dwProcessId;
1045 info->proc = pi.hProcess;
1046 info->next = pinfo;
1047 pinfo = info;
1049 LeaveCriticalSection(&pinfo_cs);
1051 return (pid_t)pi.dwProcessId;
1054 static pid_t mingw_spawnv(const char *cmd, const char **argv, int prepend_cmd)
1056 return mingw_spawnve_fd(cmd, argv, NULL, NULL, prepend_cmd, 0, 1, 2);
1059 pid_t mingw_spawnvpe(const char *cmd, const char **argv, char **deltaenv,
1060 const char *dir,
1061 int fhin, int fhout, int fherr)
1063 pid_t pid;
1064 char **path = get_path_split();
1065 char *prog = path_lookup(cmd, path, 0);
1067 if (!prog) {
1068 errno = ENOENT;
1069 pid = -1;
1071 else {
1072 const char *interpr = parse_interpreter(prog);
1074 if (interpr) {
1075 const char *argv0 = argv[0];
1076 char *iprog = path_lookup(interpr, path, 1);
1077 argv[0] = prog;
1078 if (!iprog) {
1079 errno = ENOENT;
1080 pid = -1;
1082 else {
1083 pid = mingw_spawnve_fd(iprog, argv, deltaenv, dir, 1,
1084 fhin, fhout, fherr);
1085 free(iprog);
1087 argv[0] = argv0;
1089 else
1090 pid = mingw_spawnve_fd(prog, argv, deltaenv, dir, 0,
1091 fhin, fhout, fherr);
1092 free(prog);
1094 free_path_split(path);
1095 return pid;
1098 static int try_shell_exec(const char *cmd, char *const *argv)
1100 const char *interpr = parse_interpreter(cmd);
1101 char **path;
1102 char *prog;
1103 int pid = 0;
1105 if (!interpr)
1106 return 0;
1107 path = get_path_split();
1108 prog = path_lookup(interpr, path, 1);
1109 if (prog) {
1110 int argc = 0;
1111 const char **argv2;
1112 while (argv[argc]) argc++;
1113 argv2 = xmalloc(sizeof(*argv) * (argc+1));
1114 argv2[0] = (char *)cmd; /* full path to the script file */
1115 memcpy(&argv2[1], &argv[1], sizeof(*argv) * argc);
1116 pid = mingw_spawnv(prog, argv2, 1);
1117 if (pid >= 0) {
1118 int status;
1119 if (waitpid(pid, &status, 0) < 0)
1120 status = 255;
1121 exit(status);
1123 pid = 1; /* indicate that we tried but failed */
1124 free(prog);
1125 free(argv2);
1127 free_path_split(path);
1128 return pid;
1131 int mingw_execv(const char *cmd, char *const *argv)
1133 /* check if git_command is a shell script */
1134 if (!try_shell_exec(cmd, argv)) {
1135 int pid, status;
1137 pid = mingw_spawnv(cmd, (const char **)argv, 0);
1138 if (pid < 0)
1139 return -1;
1140 if (waitpid(pid, &status, 0) < 0)
1141 status = 255;
1142 exit(status);
1144 return -1;
1147 int mingw_execvp(const char *cmd, char *const *argv)
1149 char **path = get_path_split();
1150 char *prog = path_lookup(cmd, path, 0);
1152 if (prog) {
1153 mingw_execv(prog, argv);
1154 free(prog);
1155 } else
1156 errno = ENOENT;
1158 free_path_split(path);
1159 return -1;
1162 int mingw_kill(pid_t pid, int sig)
1164 if (pid > 0 && sig == SIGTERM) {
1165 HANDLE h = OpenProcess(PROCESS_TERMINATE, FALSE, pid);
1167 if (TerminateProcess(h, -1)) {
1168 CloseHandle(h);
1169 return 0;
1172 errno = err_win_to_posix(GetLastError());
1173 CloseHandle(h);
1174 return -1;
1175 } else if (pid > 0 && sig == 0) {
1176 HANDLE h = OpenProcess(PROCESS_QUERY_INFORMATION, FALSE, pid);
1177 if (h) {
1178 CloseHandle(h);
1179 return 0;
1183 errno = EINVAL;
1184 return -1;
1188 * Compare environment entries by key (i.e. stopping at '=' or '\0').
1190 static int compareenv(const void *v1, const void *v2)
1192 const char *e1 = *(const char**)v1;
1193 const char *e2 = *(const char**)v2;
1195 for (;;) {
1196 int c1 = *e1++;
1197 int c2 = *e2++;
1198 c1 = (c1 == '=') ? 0 : tolower(c1);
1199 c2 = (c2 == '=') ? 0 : tolower(c2);
1200 if (c1 > c2)
1201 return 1;
1202 if (c1 < c2)
1203 return -1;
1204 if (c1 == 0)
1205 return 0;
1209 static int bsearchenv(char **env, const char *name, size_t size)
1211 unsigned low = 0, high = size;
1212 while (low < high) {
1213 unsigned mid = low + ((high - low) >> 1);
1214 int cmp = compareenv(&env[mid], &name);
1215 if (cmp < 0)
1216 low = mid + 1;
1217 else if (cmp > 0)
1218 high = mid;
1219 else
1220 return mid;
1222 return ~low; /* not found, return 1's complement of insert position */
1226 * If name contains '=', then sets the variable, otherwise it unsets it
1227 * Size includes the terminating NULL. Env must have room for size + 1 entries
1228 * (in case of insert). Returns the new size. Optionally frees removed entries.
1230 static int do_putenv(char **env, const char *name, int size, int free_old)
1232 int i = bsearchenv(env, name, size - 1);
1234 /* optionally free removed / replaced entry */
1235 if (i >= 0 && free_old)
1236 free(env[i]);
1238 if (strchr(name, '=')) {
1239 /* if new value ('key=value') is specified, insert or replace entry */
1240 if (i < 0) {
1241 i = ~i;
1242 memmove(&env[i + 1], &env[i], (size - i) * sizeof(char*));
1243 size++;
1245 env[i] = (char*) name;
1246 } else if (i >= 0) {
1247 /* otherwise ('key') remove existing entry */
1248 size--;
1249 memmove(&env[i], &env[i + 1], (size - i) * sizeof(char*));
1251 return size;
1254 char *mingw_getenv(const char *name)
1256 char *value;
1257 int pos = bsearchenv(environ, name, environ_size - 1);
1258 if (pos < 0)
1259 return NULL;
1260 value = strchr(environ[pos], '=');
1261 return value ? &value[1] : NULL;
1264 int mingw_putenv(const char *namevalue)
1266 ALLOC_GROW(environ, (environ_size + 1) * sizeof(char*), environ_alloc);
1267 environ_size = do_putenv(environ, namevalue, environ_size, 1);
1268 return 0;
1272 * Note, this isn't a complete replacement for getaddrinfo. It assumes
1273 * that service contains a numerical port, or that it is null. It
1274 * does a simple search using gethostbyname, and returns one IPv4 host
1275 * if one was found.
1277 static int WSAAPI getaddrinfo_stub(const char *node, const char *service,
1278 const struct addrinfo *hints,
1279 struct addrinfo **res)
1281 struct hostent *h = NULL;
1282 struct addrinfo *ai;
1283 struct sockaddr_in *sin;
1285 if (node) {
1286 h = gethostbyname(node);
1287 if (!h)
1288 return WSAGetLastError();
1291 ai = xmalloc(sizeof(struct addrinfo));
1292 *res = ai;
1293 ai->ai_flags = 0;
1294 ai->ai_family = AF_INET;
1295 ai->ai_socktype = hints ? hints->ai_socktype : 0;
1296 switch (ai->ai_socktype) {
1297 case SOCK_STREAM:
1298 ai->ai_protocol = IPPROTO_TCP;
1299 break;
1300 case SOCK_DGRAM:
1301 ai->ai_protocol = IPPROTO_UDP;
1302 break;
1303 default:
1304 ai->ai_protocol = 0;
1305 break;
1307 ai->ai_addrlen = sizeof(struct sockaddr_in);
1308 if (hints && (hints->ai_flags & AI_CANONNAME))
1309 ai->ai_canonname = h ? xstrdup(h->h_name) : NULL;
1310 else
1311 ai->ai_canonname = NULL;
1313 sin = xcalloc(1, ai->ai_addrlen);
1314 sin->sin_family = AF_INET;
1315 /* Note: getaddrinfo is supposed to allow service to be a string,
1316 * which should be looked up using getservbyname. This is
1317 * currently not implemented */
1318 if (service)
1319 sin->sin_port = htons(atoi(service));
1320 if (h)
1321 sin->sin_addr = *(struct in_addr *)h->h_addr;
1322 else if (hints && (hints->ai_flags & AI_PASSIVE))
1323 sin->sin_addr.s_addr = INADDR_ANY;
1324 else
1325 sin->sin_addr.s_addr = INADDR_LOOPBACK;
1326 ai->ai_addr = (struct sockaddr *)sin;
1327 ai->ai_next = NULL;
1328 return 0;
1331 static void WSAAPI freeaddrinfo_stub(struct addrinfo *res)
1333 free(res->ai_canonname);
1334 free(res->ai_addr);
1335 free(res);
1338 static int WSAAPI getnameinfo_stub(const struct sockaddr *sa, socklen_t salen,
1339 char *host, DWORD hostlen,
1340 char *serv, DWORD servlen, int flags)
1342 const struct sockaddr_in *sin = (const struct sockaddr_in *)sa;
1343 if (sa->sa_family != AF_INET)
1344 return EAI_FAMILY;
1345 if (!host && !serv)
1346 return EAI_NONAME;
1348 if (host && hostlen > 0) {
1349 struct hostent *ent = NULL;
1350 if (!(flags & NI_NUMERICHOST))
1351 ent = gethostbyaddr((const char *)&sin->sin_addr,
1352 sizeof(sin->sin_addr), AF_INET);
1354 if (ent)
1355 snprintf(host, hostlen, "%s", ent->h_name);
1356 else if (flags & NI_NAMEREQD)
1357 return EAI_NONAME;
1358 else
1359 snprintf(host, hostlen, "%s", inet_ntoa(sin->sin_addr));
1362 if (serv && servlen > 0) {
1363 struct servent *ent = NULL;
1364 if (!(flags & NI_NUMERICSERV))
1365 ent = getservbyport(sin->sin_port,
1366 flags & NI_DGRAM ? "udp" : "tcp");
1368 if (ent)
1369 snprintf(serv, servlen, "%s", ent->s_name);
1370 else
1371 snprintf(serv, servlen, "%d", ntohs(sin->sin_port));
1374 return 0;
1377 static HMODULE ipv6_dll = NULL;
1378 static void (WSAAPI *ipv6_freeaddrinfo)(struct addrinfo *res);
1379 static int (WSAAPI *ipv6_getaddrinfo)(const char *node, const char *service,
1380 const struct addrinfo *hints,
1381 struct addrinfo **res);
1382 static int (WSAAPI *ipv6_getnameinfo)(const struct sockaddr *sa, socklen_t salen,
1383 char *host, DWORD hostlen,
1384 char *serv, DWORD servlen, int flags);
1386 * gai_strerror is an inline function in the ws2tcpip.h header, so we
1387 * don't need to try to load that one dynamically.
1390 static void socket_cleanup(void)
1392 WSACleanup();
1393 if (ipv6_dll)
1394 FreeLibrary(ipv6_dll);
1395 ipv6_dll = NULL;
1396 ipv6_freeaddrinfo = freeaddrinfo_stub;
1397 ipv6_getaddrinfo = getaddrinfo_stub;
1398 ipv6_getnameinfo = getnameinfo_stub;
1401 static void ensure_socket_initialization(void)
1403 WSADATA wsa;
1404 static int initialized = 0;
1405 const char *libraries[] = { "ws2_32.dll", "wship6.dll", NULL };
1406 const char **name;
1408 if (initialized)
1409 return;
1411 if (WSAStartup(MAKEWORD(2,2), &wsa))
1412 die("unable to initialize winsock subsystem, error %d",
1413 WSAGetLastError());
1415 for (name = libraries; *name; name++) {
1416 ipv6_dll = LoadLibrary(*name);
1417 if (!ipv6_dll)
1418 continue;
1420 ipv6_freeaddrinfo = (void (WSAAPI *)(struct addrinfo *))
1421 GetProcAddress(ipv6_dll, "freeaddrinfo");
1422 ipv6_getaddrinfo = (int (WSAAPI *)(const char *, const char *,
1423 const struct addrinfo *,
1424 struct addrinfo **))
1425 GetProcAddress(ipv6_dll, "getaddrinfo");
1426 ipv6_getnameinfo = (int (WSAAPI *)(const struct sockaddr *,
1427 socklen_t, char *, DWORD,
1428 char *, DWORD, int))
1429 GetProcAddress(ipv6_dll, "getnameinfo");
1430 if (!ipv6_freeaddrinfo || !ipv6_getaddrinfo || !ipv6_getnameinfo) {
1431 FreeLibrary(ipv6_dll);
1432 ipv6_dll = NULL;
1433 } else
1434 break;
1436 if (!ipv6_freeaddrinfo || !ipv6_getaddrinfo || !ipv6_getnameinfo) {
1437 ipv6_freeaddrinfo = freeaddrinfo_stub;
1438 ipv6_getaddrinfo = getaddrinfo_stub;
1439 ipv6_getnameinfo = getnameinfo_stub;
1442 atexit(socket_cleanup);
1443 initialized = 1;
1446 #undef gethostname
1447 int mingw_gethostname(char *name, int namelen)
1449 ensure_socket_initialization();
1450 return gethostname(name, namelen);
1453 #undef gethostbyname
1454 struct hostent *mingw_gethostbyname(const char *host)
1456 ensure_socket_initialization();
1457 return gethostbyname(host);
1460 void mingw_freeaddrinfo(struct addrinfo *res)
1462 ipv6_freeaddrinfo(res);
1465 int mingw_getaddrinfo(const char *node, const char *service,
1466 const struct addrinfo *hints, struct addrinfo **res)
1468 ensure_socket_initialization();
1469 return ipv6_getaddrinfo(node, service, hints, res);
1472 int mingw_getnameinfo(const struct sockaddr *sa, socklen_t salen,
1473 char *host, DWORD hostlen, char *serv, DWORD servlen,
1474 int flags)
1476 ensure_socket_initialization();
1477 return ipv6_getnameinfo(sa, salen, host, hostlen, serv, servlen, flags);
1480 int mingw_socket(int domain, int type, int protocol)
1482 int sockfd;
1483 SOCKET s;
1485 ensure_socket_initialization();
1486 s = WSASocket(domain, type, protocol, NULL, 0, 0);
1487 if (s == INVALID_SOCKET) {
1489 * WSAGetLastError() values are regular BSD error codes
1490 * biased by WSABASEERR.
1491 * However, strerror() does not know about networking
1492 * specific errors, which are values beginning at 38 or so.
1493 * Therefore, we choose to leave the biased error code
1494 * in errno so that _if_ someone looks up the code somewhere,
1495 * then it is at least the number that are usually listed.
1497 errno = WSAGetLastError();
1498 return -1;
1500 /* convert into a file descriptor */
1501 if ((sockfd = _open_osfhandle(s, O_RDWR|O_BINARY)) < 0) {
1502 closesocket(s);
1503 return error("unable to make a socket file descriptor: %s",
1504 strerror(errno));
1506 return sockfd;
1509 #undef connect
1510 int mingw_connect(int sockfd, struct sockaddr *sa, size_t sz)
1512 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
1513 return connect(s, sa, sz);
1516 #undef bind
1517 int mingw_bind(int sockfd, struct sockaddr *sa, size_t sz)
1519 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
1520 return bind(s, sa, sz);
1523 #undef setsockopt
1524 int mingw_setsockopt(int sockfd, int lvl, int optname, void *optval, int optlen)
1526 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
1527 return setsockopt(s, lvl, optname, (const char*)optval, optlen);
1530 #undef shutdown
1531 int mingw_shutdown(int sockfd, int how)
1533 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
1534 return shutdown(s, how);
1537 #undef listen
1538 int mingw_listen(int sockfd, int backlog)
1540 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
1541 return listen(s, backlog);
1544 #undef accept
1545 int mingw_accept(int sockfd1, struct sockaddr *sa, socklen_t *sz)
1547 int sockfd2;
1549 SOCKET s1 = (SOCKET)_get_osfhandle(sockfd1);
1550 SOCKET s2 = accept(s1, sa, sz);
1552 /* convert into a file descriptor */
1553 if ((sockfd2 = _open_osfhandle(s2, O_RDWR|O_BINARY)) < 0) {
1554 int err = errno;
1555 closesocket(s2);
1556 return error("unable to make a socket file descriptor: %s",
1557 strerror(err));
1559 return sockfd2;
1562 #undef rename
1563 int mingw_rename(const char *pold, const char *pnew)
1565 DWORD attrs, gle;
1566 int tries = 0;
1567 wchar_t wpold[MAX_PATH], wpnew[MAX_PATH];
1568 if (xutftowcs_path(wpold, pold) < 0 || xutftowcs_path(wpnew, pnew) < 0)
1569 return -1;
1572 * Try native rename() first to get errno right.
1573 * It is based on MoveFile(), which cannot overwrite existing files.
1575 if (!_wrename(wpold, wpnew))
1576 return 0;
1577 if (errno != EEXIST)
1578 return -1;
1579 repeat:
1580 if (MoveFileExW(wpold, wpnew, MOVEFILE_REPLACE_EXISTING))
1581 return 0;
1582 /* TODO: translate more errors */
1583 gle = GetLastError();
1584 if (gle == ERROR_ACCESS_DENIED &&
1585 (attrs = GetFileAttributesW(wpnew)) != INVALID_FILE_ATTRIBUTES) {
1586 if (attrs & FILE_ATTRIBUTE_DIRECTORY) {
1587 errno = EISDIR;
1588 return -1;
1590 if ((attrs & FILE_ATTRIBUTE_READONLY) &&
1591 SetFileAttributesW(wpnew, attrs & ~FILE_ATTRIBUTE_READONLY)) {
1592 if (MoveFileExW(wpold, wpnew, MOVEFILE_REPLACE_EXISTING))
1593 return 0;
1594 gle = GetLastError();
1595 /* revert file attributes on failure */
1596 SetFileAttributesW(wpnew, attrs);
1599 if (tries < ARRAY_SIZE(delay) && gle == ERROR_ACCESS_DENIED) {
1601 * We assume that some other process had the source or
1602 * destination file open at the wrong moment and retry.
1603 * In order to give the other process a higher chance to
1604 * complete its operation, we give up our time slice now.
1605 * If we have to retry again, we do sleep a bit.
1607 Sleep(delay[tries]);
1608 tries++;
1609 goto repeat;
1611 if (gle == ERROR_ACCESS_DENIED &&
1612 ask_yes_no_if_possible("Rename from '%s' to '%s' failed. "
1613 "Should I try again?", pold, pnew))
1614 goto repeat;
1616 errno = EACCES;
1617 return -1;
1621 * Note that this doesn't return the actual pagesize, but
1622 * the allocation granularity. If future Windows specific git code
1623 * needs the real getpagesize function, we need to find another solution.
1625 int mingw_getpagesize(void)
1627 SYSTEM_INFO si;
1628 GetSystemInfo(&si);
1629 return si.dwAllocationGranularity;
1632 struct passwd *getpwuid(int uid)
1634 static char user_name[100];
1635 static struct passwd p;
1637 DWORD len = sizeof(user_name);
1638 if (!GetUserName(user_name, &len))
1639 return NULL;
1640 p.pw_name = user_name;
1641 p.pw_gecos = "unknown";
1642 p.pw_dir = NULL;
1643 return &p;
1646 static HANDLE timer_event;
1647 static HANDLE timer_thread;
1648 static int timer_interval;
1649 static int one_shot;
1650 static sig_handler_t timer_fn = SIG_DFL, sigint_fn = SIG_DFL;
1652 /* The timer works like this:
1653 * The thread, ticktack(), is a trivial routine that most of the time
1654 * only waits to receive the signal to terminate. The main thread tells
1655 * the thread to terminate by setting the timer_event to the signalled
1656 * state.
1657 * But ticktack() interrupts the wait state after the timer's interval
1658 * length to call the signal handler.
1661 static unsigned __stdcall ticktack(void *dummy)
1663 while (WaitForSingleObject(timer_event, timer_interval) == WAIT_TIMEOUT) {
1664 mingw_raise(SIGALRM);
1665 if (one_shot)
1666 break;
1668 return 0;
1671 static int start_timer_thread(void)
1673 timer_event = CreateEvent(NULL, FALSE, FALSE, NULL);
1674 if (timer_event) {
1675 timer_thread = (HANDLE) _beginthreadex(NULL, 0, ticktack, NULL, 0, NULL);
1676 if (!timer_thread )
1677 return errno = ENOMEM,
1678 error("cannot start timer thread");
1679 } else
1680 return errno = ENOMEM,
1681 error("cannot allocate resources for timer");
1682 return 0;
1685 static void stop_timer_thread(void)
1687 if (timer_event)
1688 SetEvent(timer_event); /* tell thread to terminate */
1689 if (timer_thread) {
1690 int rc = WaitForSingleObject(timer_thread, 1000);
1691 if (rc == WAIT_TIMEOUT)
1692 error("timer thread did not terminate timely");
1693 else if (rc != WAIT_OBJECT_0)
1694 error("waiting for timer thread failed: %lu",
1695 GetLastError());
1696 CloseHandle(timer_thread);
1698 if (timer_event)
1699 CloseHandle(timer_event);
1700 timer_event = NULL;
1701 timer_thread = NULL;
1704 static inline int is_timeval_eq(const struct timeval *i1, const struct timeval *i2)
1706 return i1->tv_sec == i2->tv_sec && i1->tv_usec == i2->tv_usec;
1709 int setitimer(int type, struct itimerval *in, struct itimerval *out)
1711 static const struct timeval zero;
1712 static int atexit_done;
1714 if (out != NULL)
1715 return errno = EINVAL,
1716 error("setitimer param 3 != NULL not implemented");
1717 if (!is_timeval_eq(&in->it_interval, &zero) &&
1718 !is_timeval_eq(&in->it_interval, &in->it_value))
1719 return errno = EINVAL,
1720 error("setitimer: it_interval must be zero or eq it_value");
1722 if (timer_thread)
1723 stop_timer_thread();
1725 if (is_timeval_eq(&in->it_value, &zero) &&
1726 is_timeval_eq(&in->it_interval, &zero))
1727 return 0;
1729 timer_interval = in->it_value.tv_sec * 1000 + in->it_value.tv_usec / 1000;
1730 one_shot = is_timeval_eq(&in->it_interval, &zero);
1731 if (!atexit_done) {
1732 atexit(stop_timer_thread);
1733 atexit_done = 1;
1735 return start_timer_thread();
1738 int sigaction(int sig, struct sigaction *in, struct sigaction *out)
1740 if (sig != SIGALRM)
1741 return errno = EINVAL,
1742 error("sigaction only implemented for SIGALRM");
1743 if (out != NULL)
1744 return errno = EINVAL,
1745 error("sigaction: param 3 != NULL not implemented");
1747 timer_fn = in->sa_handler;
1748 return 0;
1751 #undef signal
1752 sig_handler_t mingw_signal(int sig, sig_handler_t handler)
1754 sig_handler_t old;
1756 switch (sig) {
1757 case SIGALRM:
1758 old = timer_fn;
1759 timer_fn = handler;
1760 break;
1762 case SIGINT:
1763 old = sigint_fn;
1764 sigint_fn = handler;
1765 break;
1767 default:
1768 return signal(sig, handler);
1771 return old;
1774 #undef raise
1775 int mingw_raise(int sig)
1777 switch (sig) {
1778 case SIGALRM:
1779 if (timer_fn == SIG_DFL) {
1780 if (isatty(STDERR_FILENO))
1781 fputs("Alarm clock\n", stderr);
1782 exit(128 + SIGALRM);
1783 } else if (timer_fn != SIG_IGN)
1784 timer_fn(SIGALRM);
1785 return 0;
1787 case SIGINT:
1788 if (sigint_fn == SIG_DFL)
1789 exit(128 + SIGINT);
1790 else if (sigint_fn != SIG_IGN)
1791 sigint_fn(SIGINT);
1792 return 0;
1794 default:
1795 return raise(sig);
1800 static const char *make_backslash_path(const char *path)
1802 static char buf[PATH_MAX + 1];
1803 char *c;
1805 if (strlcpy(buf, path, PATH_MAX) >= PATH_MAX)
1806 die("Too long path: %.*s", 60, path);
1808 for (c = buf; *c; c++) {
1809 if (*c == '/')
1810 *c = '\\';
1812 return buf;
1815 void mingw_open_html(const char *unixpath)
1817 const char *htmlpath = make_backslash_path(unixpath);
1818 typedef HINSTANCE (WINAPI *T)(HWND, const char *,
1819 const char *, const char *, const char *, INT);
1820 T ShellExecute;
1821 HMODULE shell32;
1822 int r;
1824 shell32 = LoadLibrary("shell32.dll");
1825 if (!shell32)
1826 die("cannot load shell32.dll");
1827 ShellExecute = (T)GetProcAddress(shell32, "ShellExecuteA");
1828 if (!ShellExecute)
1829 die("cannot run browser");
1831 printf("Launching default browser to display HTML ...\n");
1832 r = (int)ShellExecute(NULL, "open", htmlpath, NULL, "\\", SW_SHOWNORMAL);
1833 FreeLibrary(shell32);
1834 /* see the MSDN documentation referring to the result codes here */
1835 if (r <= 32) {
1836 die("failed to launch browser for %.*s", MAX_PATH, unixpath);
1840 int link(const char *oldpath, const char *newpath)
1842 typedef BOOL (WINAPI *T)(LPCWSTR, LPCWSTR, LPSECURITY_ATTRIBUTES);
1843 static T create_hard_link = NULL;
1844 wchar_t woldpath[MAX_PATH], wnewpath[MAX_PATH];
1845 if (xutftowcs_path(woldpath, oldpath) < 0 ||
1846 xutftowcs_path(wnewpath, newpath) < 0)
1847 return -1;
1849 if (!create_hard_link) {
1850 create_hard_link = (T) GetProcAddress(
1851 GetModuleHandle("kernel32.dll"), "CreateHardLinkW");
1852 if (!create_hard_link)
1853 create_hard_link = (T)-1;
1855 if (create_hard_link == (T)-1) {
1856 errno = ENOSYS;
1857 return -1;
1859 if (!create_hard_link(wnewpath, woldpath, NULL)) {
1860 errno = err_win_to_posix(GetLastError());
1861 return -1;
1863 return 0;
1866 pid_t waitpid(pid_t pid, int *status, int options)
1868 HANDLE h = OpenProcess(SYNCHRONIZE | PROCESS_QUERY_INFORMATION,
1869 FALSE, pid);
1870 if (!h) {
1871 errno = ECHILD;
1872 return -1;
1875 if (pid > 0 && options & WNOHANG) {
1876 if (WAIT_OBJECT_0 != WaitForSingleObject(h, 0)) {
1877 CloseHandle(h);
1878 return 0;
1880 options &= ~WNOHANG;
1883 if (options == 0) {
1884 struct pinfo_t **ppinfo;
1885 if (WaitForSingleObject(h, INFINITE) != WAIT_OBJECT_0) {
1886 CloseHandle(h);
1887 return 0;
1890 if (status)
1891 GetExitCodeProcess(h, (LPDWORD)status);
1893 EnterCriticalSection(&pinfo_cs);
1895 ppinfo = &pinfo;
1896 while (*ppinfo) {
1897 struct pinfo_t *info = *ppinfo;
1898 if (info->pid == pid) {
1899 CloseHandle(info->proc);
1900 *ppinfo = info->next;
1901 free(info);
1902 break;
1904 ppinfo = &info->next;
1907 LeaveCriticalSection(&pinfo_cs);
1909 CloseHandle(h);
1910 return pid;
1912 CloseHandle(h);
1914 errno = EINVAL;
1915 return -1;
1918 int mingw_offset_1st_component(const char *path)
1920 int offset = 0;
1921 if (has_dos_drive_prefix(path))
1922 offset = 2;
1924 /* unc paths */
1925 else if (is_dir_sep(path[0]) && is_dir_sep(path[1])) {
1927 /* skip server name */
1928 char *pos = strpbrk(path + 2, "\\/");
1929 if (!pos)
1930 return 0; /* Error: malformed unc path */
1932 do {
1933 pos++;
1934 } while (*pos && !is_dir_sep(*pos));
1936 offset = pos - path;
1939 return offset + is_dir_sep(path[offset]);
1942 int xutftowcsn(wchar_t *wcs, const char *utfs, size_t wcslen, int utflen)
1944 int upos = 0, wpos = 0;
1945 const unsigned char *utf = (const unsigned char*) utfs;
1946 if (!utf || !wcs || wcslen < 1) {
1947 errno = EINVAL;
1948 return -1;
1950 /* reserve space for \0 */
1951 wcslen--;
1952 if (utflen < 0)
1953 utflen = INT_MAX;
1955 while (upos < utflen) {
1956 int c = utf[upos++] & 0xff;
1957 if (utflen == INT_MAX && c == 0)
1958 break;
1960 if (wpos >= wcslen) {
1961 wcs[wpos] = 0;
1962 errno = ERANGE;
1963 return -1;
1966 if (c < 0x80) {
1967 /* ASCII */
1968 wcs[wpos++] = c;
1969 } else if (c >= 0xc2 && c < 0xe0 && upos < utflen &&
1970 (utf[upos] & 0xc0) == 0x80) {
1971 /* 2-byte utf-8 */
1972 c = ((c & 0x1f) << 6);
1973 c |= (utf[upos++] & 0x3f);
1974 wcs[wpos++] = c;
1975 } else if (c >= 0xe0 && c < 0xf0 && upos + 1 < utflen &&
1976 !(c == 0xe0 && utf[upos] < 0xa0) && /* over-long encoding */
1977 (utf[upos] & 0xc0) == 0x80 &&
1978 (utf[upos + 1] & 0xc0) == 0x80) {
1979 /* 3-byte utf-8 */
1980 c = ((c & 0x0f) << 12);
1981 c |= ((utf[upos++] & 0x3f) << 6);
1982 c |= (utf[upos++] & 0x3f);
1983 wcs[wpos++] = c;
1984 } else if (c >= 0xf0 && c < 0xf5 && upos + 2 < utflen &&
1985 wpos + 1 < wcslen &&
1986 !(c == 0xf0 && utf[upos] < 0x90) && /* over-long encoding */
1987 !(c == 0xf4 && utf[upos] >= 0x90) && /* > \u10ffff */
1988 (utf[upos] & 0xc0) == 0x80 &&
1989 (utf[upos + 1] & 0xc0) == 0x80 &&
1990 (utf[upos + 2] & 0xc0) == 0x80) {
1991 /* 4-byte utf-8: convert to \ud8xx \udcxx surrogate pair */
1992 c = ((c & 0x07) << 18);
1993 c |= ((utf[upos++] & 0x3f) << 12);
1994 c |= ((utf[upos++] & 0x3f) << 6);
1995 c |= (utf[upos++] & 0x3f);
1996 c -= 0x10000;
1997 wcs[wpos++] = 0xd800 | (c >> 10);
1998 wcs[wpos++] = 0xdc00 | (c & 0x3ff);
1999 } else if (c >= 0xa0) {
2000 /* invalid utf-8 byte, printable unicode char: convert 1:1 */
2001 wcs[wpos++] = c;
2002 } else {
2003 /* invalid utf-8 byte, non-printable unicode: convert to hex */
2004 static const char *hex = "0123456789abcdef";
2005 wcs[wpos++] = hex[c >> 4];
2006 if (wpos < wcslen)
2007 wcs[wpos++] = hex[c & 0x0f];
2010 wcs[wpos] = 0;
2011 return wpos;
2014 int xwcstoutf(char *utf, const wchar_t *wcs, size_t utflen)
2016 if (!wcs || !utf || utflen < 1) {
2017 errno = EINVAL;
2018 return -1;
2020 utflen = WideCharToMultiByte(CP_UTF8, 0, wcs, -1, utf, utflen, NULL, NULL);
2021 if (utflen)
2022 return utflen - 1;
2023 errno = ERANGE;
2024 return -1;
2028 * Disable MSVCRT command line wildcard expansion (__getmainargs called from
2029 * mingw startup code, see init.c in mingw runtime).
2031 int _CRT_glob = 0;
2033 typedef struct {
2034 int newmode;
2035 } _startupinfo;
2037 extern int __wgetmainargs(int *argc, wchar_t ***argv, wchar_t ***env, int glob,
2038 _startupinfo *si);
2040 static NORETURN void die_startup()
2042 fputs("fatal: not enough memory for initialization", stderr);
2043 exit(128);
2046 static void *malloc_startup(size_t size)
2048 void *result = malloc(size);
2049 if (!result)
2050 die_startup();
2051 return result;
2054 static char *wcstoutfdup_startup(char *buffer, const wchar_t *wcs, size_t len)
2056 len = xwcstoutf(buffer, wcs, len) + 1;
2057 return memcpy(malloc_startup(len), buffer, len);
2060 void mingw_startup()
2062 int i, maxlen, argc;
2063 char *buffer;
2064 wchar_t **wenv, **wargv;
2065 _startupinfo si;
2067 /* get wide char arguments and environment */
2068 si.newmode = 0;
2069 if (__wgetmainargs(&argc, &wargv, &wenv, _CRT_glob, &si) < 0)
2070 die_startup();
2072 /* determine size of argv and environ conversion buffer */
2073 maxlen = wcslen(_wpgmptr);
2074 for (i = 1; i < argc; i++)
2075 maxlen = max(maxlen, wcslen(wargv[i]));
2076 for (i = 0; wenv[i]; i++)
2077 maxlen = max(maxlen, wcslen(wenv[i]));
2080 * nedmalloc can't free CRT memory, allocate resizable environment
2081 * list. Note that xmalloc / xmemdupz etc. call getenv, so we cannot
2082 * use it while initializing the environment itself.
2084 environ_size = i + 1;
2085 environ_alloc = alloc_nr(environ_size * sizeof(char*));
2086 environ = malloc_startup(environ_alloc);
2088 /* allocate buffer (wchar_t encodes to max 3 UTF-8 bytes) */
2089 maxlen = 3 * maxlen + 1;
2090 buffer = malloc_startup(maxlen);
2092 /* convert command line arguments and environment to UTF-8 */
2093 __argv[0] = wcstoutfdup_startup(buffer, _wpgmptr, maxlen);
2094 for (i = 1; i < argc; i++)
2095 __argv[i] = wcstoutfdup_startup(buffer, wargv[i], maxlen);
2096 for (i = 0; wenv[i]; i++)
2097 environ[i] = wcstoutfdup_startup(buffer, wenv[i], maxlen);
2098 environ[i] = NULL;
2099 free(buffer);
2101 /* sort environment for O(log n) getenv / putenv */
2102 qsort(environ, i, sizeof(char*), compareenv);
2104 /* fix Windows specific environment settings */
2106 /* on Windows it is TMP and TEMP */
2107 if (!mingw_getenv("TMPDIR")) {
2108 const char *tmp = mingw_getenv("TMP");
2109 if (!tmp)
2110 tmp = mingw_getenv("TEMP");
2111 if (tmp)
2112 setenv("TMPDIR", tmp, 1);
2115 /* simulate TERM to enable auto-color (see color.c) */
2116 if (!getenv("TERM"))
2117 setenv("TERM", "cygwin", 1);
2119 /* initialize critical section for waitpid pinfo_t list */
2120 InitializeCriticalSection(&pinfo_cs);
2122 /* set up default file mode and file modes for stdin/out/err */
2123 _fmode = _O_BINARY;
2124 _setmode(_fileno(stdin), _O_BINARY);
2125 _setmode(_fileno(stdout), _O_BINARY);
2126 _setmode(_fileno(stderr), _O_BINARY);
2128 /* initialize Unicode console */
2129 winansi_init();