change script variable name to avoid collision with PATH in windows
[git/mingw/4msysgit/gitPS1fix.git] / compat / mingw.c
blobf3517c78f6238d8754b8e1672c509c4da1f1a5be
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"
8 static const int delay[] = { 0, 1, 10, 20, 40 };
9 unsigned int _CRT_fmode = _O_BINARY;
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] = 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 #undef unlink
204 int mingw_unlink(const char *pathname)
206 int ret, tries = 0;
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;
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.
220 Sleep(delay[tries]);
221 tries++;
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;
230 static int is_dir_empty(const char *path)
232 struct strbuf buf = STRBUF_INIT;
233 WIN32_FIND_DATAA findbuf;
234 HANDLE handle;
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;
243 while (!strcmp(findbuf.cFileName, ".") ||
244 !strcmp(findbuf.cFileName, ".."))
245 if (!FindNextFile(handle, &findbuf)) {
246 strbuf_release(&buf);
247 return GetLastError() == ERROR_NO_MORE_FILES;
249 FindClose(handle);
250 strbuf_release(&buf);
251 return 0;
254 #undef rmdir
255 int mingw_rmdir(const char *pathname)
257 int ret, tries = 0;
259 while ((ret = rmdir(pathname)) == -1 && tries < ARRAY_SIZE(delay)) {
260 if (!is_file_in_use_error(GetLastError()))
261 break;
262 if (!is_dir_empty(pathname)) {
263 errno = ENOTEMPTY;
264 break;
267 * We assume that some other process had the source or
268 * destination file open at the wrong moment and retry.
269 * In order to give the other process a higher chance to
270 * complete its operation, we give up our time slice now.
271 * If we have to retry again, we do sleep a bit.
273 Sleep(delay[tries]);
274 tries++;
276 while (ret == -1 && is_file_in_use_error(GetLastError()) &&
277 ask_yes_no_if_possible("Deletion of directory '%s' failed. "
278 "Should I try again?", pathname))
279 ret = rmdir(pathname);
280 return ret;
283 static int make_hidden(const char *path)
285 DWORD attribs = GetFileAttributes(path);
286 if (SetFileAttributes(path, FILE_ATTRIBUTE_HIDDEN | attribs))
287 return 0;
288 errno = err_win_to_posix(GetLastError());
289 return -1;
292 void mingw_mark_as_git_dir(const char *dir)
294 if (hide_dotfiles != HIDE_DOTFILES_FALSE && !is_bare_repository() &&
295 make_hidden(dir))
296 warning("Failed to make '%s' hidden", dir);
297 git_config_set("core.hideDotFiles",
298 hide_dotfiles == HIDE_DOTFILES_FALSE ? "false" :
299 (hide_dotfiles == HIDE_DOTFILES_DOTGITONLY ?
300 "dotGitOnly" : "true"));
303 #undef mkdir
304 int mingw_mkdir(const char *path, int mode)
306 int ret = mkdir(path);
307 if (!ret && hide_dotfiles == HIDE_DOTFILES_TRUE) {
309 * In Windows a file or dir starting with a dot is not
310 * automatically hidden. So lets mark it as hidden when
311 * such a directory is created.
313 const char *start = basename((char*)path);
314 if (*start == '.')
315 return make_hidden(path);
317 return ret;
320 #undef open
321 int mingw_open (const char *filename, int oflags, ...)
323 va_list args;
324 unsigned mode;
325 int fd;
327 va_start(args, oflags);
328 mode = va_arg(args, int);
329 va_end(args);
331 if (filename && !strcmp(filename, "/dev/null"))
332 filename = "nul";
334 fd = open(filename, oflags, mode);
336 if (fd < 0 && (oflags & O_CREAT) && errno == EACCES) {
337 DWORD attrs = GetFileAttributes(filename);
338 if (attrs != INVALID_FILE_ATTRIBUTES && (attrs & FILE_ATTRIBUTE_DIRECTORY))
339 errno = EISDIR;
341 if ((oflags & O_CREAT) && fd >= 0 &&
342 hide_dotfiles == HIDE_DOTFILES_TRUE) {
344 * In Windows a file or dir starting with a dot is not
345 * automatically hidden. So lets mark it as hidden when
346 * such a file is created.
348 const char *start = basename((char*)filename);
349 if (*start == '.' && make_hidden(filename))
350 warning("Could not mark '%s' as hidden.", filename);
352 return fd;
355 #undef write
356 ssize_t mingw_write(int fd, const void *buf, size_t count)
359 * While write() calls to a file on a local disk are translated
360 * into WriteFile() calls with a maximum size of 64KB on Windows
361 * XP and 256KB on Vista, no such cap is placed on writes to
362 * files over the network on Windows XP. Unfortunately, there
363 * seems to be a limit of 32MB-28KB on X64 and 64MB-32KB on x86;
364 * bigger writes fail on Windows XP.
365 * So we cap to a nice 31MB here to avoid write failures over
366 * the net without changing the number of WriteFile() calls in
367 * the local case.
369 return write(fd, buf, min(count, 31 * 1024 * 1024));
372 #undef fopen
373 FILE *mingw_fopen (const char *filename, const char *otype)
375 int hide = 0;
376 FILE *file;
377 if (hide_dotfiles == HIDE_DOTFILES_TRUE &&
378 basename((char*)filename)[0] == '.')
379 hide = access(filename, F_OK);
380 if (filename && !strcmp(filename, "/dev/null"))
381 filename = "nul";
382 file = fopen(filename, otype);
383 if (file && hide && make_hidden(filename))
384 warning("Could not mark '%s' as hidden.", filename);
385 return file;
388 #undef freopen
389 FILE *mingw_freopen (const char *filename, const char *otype, FILE *stream)
391 int hide = 0;
392 FILE *file;
393 if (hide_dotfiles == HIDE_DOTFILES_TRUE &&
394 basename((char*)filename)[0] == '.')
395 hide = access(filename, F_OK);
396 if (filename && !strcmp(filename, "/dev/null"))
397 filename = "nul";
398 file = freopen(filename, otype, stream);
399 if (file && hide && make_hidden(filename))
400 warning("Could not mark '%s' as hidden.", filename);
401 return file;
405 * The unit of FILETIME is 100-nanoseconds since January 1, 1601, UTC.
406 * Returns the 100-nanoseconds ("hekto nanoseconds") since the epoch.
408 static inline long long filetime_to_hnsec(const FILETIME *ft)
410 long long winTime = ((long long)ft->dwHighDateTime << 32) + ft->dwLowDateTime;
411 /* Windows to Unix Epoch conversion */
412 return winTime - 116444736000000000LL;
415 static inline time_t filetime_to_time_t(const FILETIME *ft)
417 return (time_t)(filetime_to_hnsec(ft) / 10000000);
420 /* We keep the do_lstat code in a separate function to avoid recursion.
421 * When a path ends with a slash, the stat will fail with ENOENT. In
422 * this case, we strip the trailing slashes and stat again.
424 * If follow is true then act like stat() and report on the link
425 * target. Otherwise report on the link itself.
427 static int do_lstat(int follow, const char *file_name, struct stat *buf)
429 int err;
430 WIN32_FILE_ATTRIBUTE_DATA fdata;
432 if (!(err = get_file_attr(file_name, &fdata))) {
433 buf->st_ino = 0;
434 buf->st_gid = 0;
435 buf->st_uid = 0;
436 buf->st_nlink = 1;
437 buf->st_mode = file_attr_to_st_mode(fdata.dwFileAttributes);
438 buf->st_size = fdata.nFileSizeLow |
439 (((off_t)fdata.nFileSizeHigh)<<32);
440 buf->st_dev = buf->st_rdev = 0; /* not used by Git */
441 buf->st_atime = filetime_to_time_t(&(fdata.ftLastAccessTime));
442 buf->st_mtime = filetime_to_time_t(&(fdata.ftLastWriteTime));
443 buf->st_ctime = filetime_to_time_t(&(fdata.ftCreationTime));
444 if (fdata.dwFileAttributes & FILE_ATTRIBUTE_REPARSE_POINT) {
445 WIN32_FIND_DATAA findbuf;
446 HANDLE handle = FindFirstFileA(file_name, &findbuf);
447 if (handle != INVALID_HANDLE_VALUE) {
448 if ((findbuf.dwFileAttributes & FILE_ATTRIBUTE_REPARSE_POINT) &&
449 (findbuf.dwReserved0 == IO_REPARSE_TAG_SYMLINK)) {
450 if (follow) {
451 char buffer[MAXIMUM_REPARSE_DATA_BUFFER_SIZE];
452 buf->st_size = readlink(file_name, buffer, MAXIMUM_REPARSE_DATA_BUFFER_SIZE);
453 } else {
454 buf->st_mode = S_IFLNK;
456 buf->st_mode |= S_IREAD;
457 if (!(findbuf.dwFileAttributes & FILE_ATTRIBUTE_READONLY))
458 buf->st_mode |= S_IWRITE;
460 FindClose(handle);
463 return 0;
465 errno = err;
466 return -1;
469 /* We provide our own lstat/fstat functions, since the provided
470 * lstat/fstat functions are so slow. These stat functions are
471 * tailored for Git's usage (read: fast), and are not meant to be
472 * complete. Note that Git stat()s are redirected to mingw_lstat()
473 * too, since Windows doesn't really handle symlinks that well.
475 static int do_stat_internal(int follow, const char *file_name, struct stat *buf)
477 int namelen;
478 char alt_name[PATH_MAX];
480 if (!do_lstat(follow, file_name, buf))
481 return 0;
483 /* if file_name ended in a '/', Windows returned ENOENT;
484 * try again without trailing slashes
486 if (errno != ENOENT)
487 return -1;
489 namelen = strlen(file_name);
490 if (namelen && file_name[namelen-1] != '/')
491 return -1;
492 while (namelen && file_name[namelen-1] == '/')
493 --namelen;
494 if (!namelen || namelen >= PATH_MAX)
495 return -1;
497 memcpy(alt_name, file_name, namelen);
498 alt_name[namelen] = 0;
499 return do_lstat(follow, alt_name, buf);
502 int mingw_lstat(const char *file_name, struct stat *buf)
504 return do_stat_internal(0, file_name, buf);
506 int mingw_stat(const char *file_name, struct stat *buf)
508 return do_stat_internal(1, file_name, buf);
511 #undef fstat
512 int mingw_fstat(int fd, struct stat *buf)
514 HANDLE fh = (HANDLE)_get_osfhandle(fd);
515 BY_HANDLE_FILE_INFORMATION fdata;
517 if (fh == INVALID_HANDLE_VALUE) {
518 errno = EBADF;
519 return -1;
521 /* direct non-file handles to MS's fstat() */
522 if (GetFileType(fh) != FILE_TYPE_DISK)
523 return _fstati64(fd, buf);
525 if (GetFileInformationByHandle(fh, &fdata)) {
526 buf->st_ino = 0;
527 buf->st_gid = 0;
528 buf->st_uid = 0;
529 buf->st_nlink = 1;
530 buf->st_mode = file_attr_to_st_mode(fdata.dwFileAttributes);
531 buf->st_size = fdata.nFileSizeLow |
532 (((off_t)fdata.nFileSizeHigh)<<32);
533 buf->st_dev = buf->st_rdev = 0; /* not used by Git */
534 buf->st_atime = filetime_to_time_t(&(fdata.ftLastAccessTime));
535 buf->st_mtime = filetime_to_time_t(&(fdata.ftLastWriteTime));
536 buf->st_ctime = filetime_to_time_t(&(fdata.ftCreationTime));
537 return 0;
539 errno = EBADF;
540 return -1;
543 static inline void time_t_to_filetime(time_t t, FILETIME *ft)
545 long long winTime = t * 10000000LL + 116444736000000000LL;
546 ft->dwLowDateTime = winTime;
547 ft->dwHighDateTime = winTime >> 32;
550 int mingw_utime (const char *file_name, const struct utimbuf *times)
552 FILETIME mft, aft;
553 int fh, rc;
555 /* must have write permission */
556 DWORD attrs = GetFileAttributes(file_name);
557 if (attrs != INVALID_FILE_ATTRIBUTES &&
558 (attrs & FILE_ATTRIBUTE_READONLY)) {
559 /* ignore errors here; open() will report them */
560 SetFileAttributes(file_name, attrs & ~FILE_ATTRIBUTE_READONLY);
563 if ((fh = open(file_name, O_RDWR | O_BINARY)) < 0) {
564 rc = -1;
565 goto revert_attrs;
568 if (times) {
569 time_t_to_filetime(times->modtime, &mft);
570 time_t_to_filetime(times->actime, &aft);
571 } else {
572 GetSystemTimeAsFileTime(&mft);
573 aft = mft;
575 if (!SetFileTime((HANDLE)_get_osfhandle(fh), NULL, &aft, &mft)) {
576 errno = EINVAL;
577 rc = -1;
578 } else
579 rc = 0;
580 close(fh);
582 revert_attrs:
583 if (attrs != INVALID_FILE_ATTRIBUTES &&
584 (attrs & FILE_ATTRIBUTE_READONLY)) {
585 /* ignore errors again */
586 SetFileAttributes(file_name, attrs);
588 return rc;
591 unsigned int sleep (unsigned int seconds)
593 Sleep(seconds*1000);
594 return 0;
597 int mkstemp(char *template)
599 char *filename = mktemp(template);
600 if (filename == NULL)
601 return -1;
602 return open(filename, O_RDWR | O_CREAT, 0600);
605 int gettimeofday(struct timeval *tv, void *tz)
607 FILETIME ft;
608 long long hnsec;
610 GetSystemTimeAsFileTime(&ft);
611 hnsec = filetime_to_hnsec(&ft);
612 tv->tv_sec = hnsec / 10000000;
613 tv->tv_usec = (hnsec % 10000000) / 10;
614 return 0;
617 int pipe(int filedes[2])
619 HANDLE h[2];
621 /* this creates non-inheritable handles */
622 if (!CreatePipe(&h[0], &h[1], NULL, 8192)) {
623 errno = err_win_to_posix(GetLastError());
624 return -1;
626 filedes[0] = _open_osfhandle((int)h[0], O_NOINHERIT);
627 if (filedes[0] < 0) {
628 CloseHandle(h[0]);
629 CloseHandle(h[1]);
630 return -1;
632 filedes[1] = _open_osfhandle((int)h[1], O_NOINHERIT);
633 if (filedes[0] < 0) {
634 close(filedes[0]);
635 CloseHandle(h[1]);
636 return -1;
638 return 0;
641 struct tm *gmtime_r(const time_t *timep, struct tm *result)
643 /* gmtime() in MSVCRT.DLL is thread-safe, but not reentrant */
644 memcpy(result, gmtime(timep), sizeof(struct tm));
645 return result;
648 struct tm *localtime_r(const time_t *timep, struct tm *result)
650 /* localtime() in MSVCRT.DLL is thread-safe, but not reentrant */
651 memcpy(result, localtime(timep), sizeof(struct tm));
652 return result;
655 #undef getcwd
656 char *mingw_getcwd(char *pointer, int len)
658 int i;
659 char *ret = getcwd(pointer, len);
660 if (!ret)
661 return ret;
662 for (i = 0; pointer[i]; i++)
663 if (pointer[i] == '\\')
664 pointer[i] = '/';
665 return ret;
668 #undef getenv
669 char *mingw_getenv(const char *name)
671 char *result = getenv(name);
672 if (!result) {
673 if (!strcmp(name, "TMPDIR")) {
674 /* on Windows it is TMP and TEMP */
675 result = getenv("TMP");
676 if (!result)
677 result = getenv("TEMP");
678 } else if (!strcmp(name, "TERM")) {
679 /* simulate TERM to enable auto-color (see color.c) */
680 result = "winansi";
683 return result;
687 * See http://msdn2.microsoft.com/en-us/library/17w5ykft(vs.71).aspx
688 * (Parsing C++ Command-Line Arguments)
690 static const char *quote_arg(const char *arg)
692 /* count chars to quote */
693 int len = 0, n = 0;
694 int force_quotes = 0;
695 char *q, *d;
696 const char *p = arg;
697 if (!*p) force_quotes = 1;
698 while (*p) {
699 if (isspace(*p) || *p == '*' || *p == '?' || *p == '{' || *p == '\'')
700 force_quotes = 1;
701 else if (*p == '"')
702 n++;
703 else if (*p == '\\') {
704 int count = 0;
705 while (*p == '\\') {
706 count++;
707 p++;
708 len++;
710 if (*p == '"')
711 n += count*2 + 1;
712 continue;
714 len++;
715 p++;
717 if (!force_quotes && n == 0)
718 return arg;
720 /* insert \ where necessary */
721 d = q = xmalloc(len+n+3);
722 *d++ = '"';
723 while (*arg) {
724 if (*arg == '"')
725 *d++ = '\\';
726 else if (*arg == '\\') {
727 int count = 0;
728 while (*arg == '\\') {
729 count++;
730 *d++ = *arg++;
732 if (*arg == '"') {
733 while (count-- > 0)
734 *d++ = '\\';
735 *d++ = '\\';
738 *d++ = *arg++;
740 *d++ = '"';
741 *d++ = 0;
742 return q;
745 static const char *parse_interpreter(const char *cmd)
747 static char buf[100];
748 char *p, *opt;
749 int n, fd;
751 /* don't even try a .exe */
752 n = strlen(cmd);
753 if (n >= 4 && !strcasecmp(cmd+n-4, ".exe"))
754 return NULL;
756 fd = open(cmd, O_RDONLY);
757 if (fd < 0)
758 return NULL;
759 n = read(fd, buf, sizeof(buf)-1);
760 close(fd);
761 if (n < 4) /* at least '#!/x' and not error */
762 return NULL;
764 if (buf[0] != '#' || buf[1] != '!')
765 return NULL;
766 buf[n] = '\0';
767 p = buf + strcspn(buf, "\r\n");
768 if (!*p)
769 return NULL;
771 *p = '\0';
772 if (!(p = strrchr(buf+2, '/')) && !(p = strrchr(buf+2, '\\')))
773 return NULL;
774 /* strip options */
775 if ((opt = strchr(p+1, ' ')))
776 *opt = '\0';
777 return p+1;
781 * Splits the PATH into parts.
783 static char **get_path_split(void)
785 char *p, **path, *envpath = getenv("PATH");
786 int i, n = 0;
788 if (!envpath || !*envpath)
789 return NULL;
791 envpath = xstrdup(envpath);
792 p = envpath;
793 while (p) {
794 char *dir = p;
795 p = strchr(p, ';');
796 if (p) *p++ = '\0';
797 if (*dir) { /* not earlier, catches series of ; */
798 ++n;
801 if (!n)
802 return NULL;
804 path = xmalloc((n+1)*sizeof(char *));
805 p = envpath;
806 i = 0;
807 do {
808 if (*p)
809 path[i++] = xstrdup(p);
810 p = p+strlen(p)+1;
811 } while (i < n);
812 path[i] = NULL;
814 free(envpath);
816 return path;
819 static void free_path_split(char **path)
821 char **p = path;
823 if (!path)
824 return;
826 while (*p)
827 free(*p++);
828 free(path);
832 * exe_only means that we only want to detect .exe files, but not scripts
833 * (which do not have an extension)
835 static char *lookup_prog(const char *dir, const char *cmd, int isexe, int exe_only)
837 char path[MAX_PATH];
838 snprintf(path, sizeof(path), "%s/%s.exe", dir, cmd);
840 if (!isexe && access(path, F_OK) == 0)
841 return xstrdup(path);
842 path[strlen(path)-4] = '\0';
843 if ((!exe_only || isexe) && access(path, F_OK) == 0)
844 if (!(GetFileAttributes(path) & FILE_ATTRIBUTE_DIRECTORY))
845 return xstrdup(path);
846 return NULL;
850 * Determines the absolute path of cmd using the split path in path.
851 * If cmd contains a slash or backslash, no lookup is performed.
853 static char *path_lookup(const char *cmd, char **path, int exe_only)
855 char *prog = NULL;
856 int len = strlen(cmd);
857 int isexe = len >= 4 && !strcasecmp(cmd+len-4, ".exe");
859 if (strchr(cmd, '/') || strchr(cmd, '\\'))
860 prog = xstrdup(cmd);
862 while (!prog && *path)
863 prog = lookup_prog(*path++, cmd, isexe, exe_only);
865 return prog;
868 static int env_compare(const void *a, const void *b)
870 char *const *ea = a;
871 char *const *eb = b;
872 return strcasecmp(*ea, *eb);
875 struct pinfo_t {
876 struct pinfo_t *next;
877 pid_t pid;
878 HANDLE proc;
879 } pinfo_t;
880 struct pinfo_t *pinfo = NULL;
881 CRITICAL_SECTION pinfo_cs;
883 static pid_t mingw_spawnve_fd(const char *cmd, const char **argv, char **env,
884 const char *dir,
885 int prepend_cmd, int fhin, int fhout, int fherr)
887 STARTUPINFO si;
888 PROCESS_INFORMATION pi;
889 struct strbuf envblk, args;
890 unsigned flags;
891 BOOL ret;
893 /* Determine whether or not we are associated to a console */
894 HANDLE cons = CreateFile("CONOUT$", GENERIC_WRITE,
895 FILE_SHARE_WRITE, NULL, OPEN_EXISTING,
896 FILE_ATTRIBUTE_NORMAL, NULL);
897 if (cons == INVALID_HANDLE_VALUE) {
898 /* There is no console associated with this process.
899 * Since the child is a console process, Windows
900 * would normally create a console window. But
901 * since we'll be redirecting std streams, we do
902 * not need the console.
903 * It is necessary to use DETACHED_PROCESS
904 * instead of CREATE_NO_WINDOW to make ssh
905 * recognize that it has no console.
907 flags = DETACHED_PROCESS;
908 } else {
909 /* There is already a console. If we specified
910 * DETACHED_PROCESS here, too, Windows would
911 * disassociate the child from the console.
912 * The same is true for CREATE_NO_WINDOW.
913 * Go figure!
915 flags = 0;
916 CloseHandle(cons);
918 memset(&si, 0, sizeof(si));
919 si.cb = sizeof(si);
920 si.dwFlags = STARTF_USESTDHANDLES;
921 si.hStdInput = (HANDLE) _get_osfhandle(fhin);
922 si.hStdOutput = (HANDLE) _get_osfhandle(fhout);
923 si.hStdError = (HANDLE) _get_osfhandle(fherr);
925 /* concatenate argv, quoting args as we go */
926 strbuf_init(&args, 0);
927 if (prepend_cmd) {
928 char *quoted = (char *)quote_arg(cmd);
929 strbuf_addstr(&args, quoted);
930 if (quoted != cmd)
931 free(quoted);
933 for (; *argv; argv++) {
934 char *quoted = (char *)quote_arg(*argv);
935 if (*args.buf)
936 strbuf_addch(&args, ' ');
937 strbuf_addstr(&args, quoted);
938 if (quoted != *argv)
939 free(quoted);
942 if (env) {
943 int count = 0;
944 char **e, **sorted_env;
946 for (e = env; *e; e++)
947 count++;
949 /* environment must be sorted */
950 sorted_env = xmalloc(sizeof(*sorted_env) * (count + 1));
951 memcpy(sorted_env, env, sizeof(*sorted_env) * (count + 1));
952 qsort(sorted_env, count, sizeof(*sorted_env), env_compare);
954 strbuf_init(&envblk, 0);
955 for (e = sorted_env; *e; e++) {
956 strbuf_addstr(&envblk, *e);
957 strbuf_addch(&envblk, '\0');
959 free(sorted_env);
962 memset(&pi, 0, sizeof(pi));
963 ret = CreateProcess(cmd, args.buf, NULL, NULL, TRUE, flags,
964 env ? envblk.buf : NULL, dir, &si, &pi);
966 if (env)
967 strbuf_release(&envblk);
968 strbuf_release(&args);
970 if (!ret) {
971 errno = ENOENT;
972 return -1;
974 CloseHandle(pi.hThread);
977 * The process ID is the human-readable identifier of the process
978 * that we want to present in log and error messages. The handle
979 * is not useful for this purpose. But we cannot close it, either,
980 * because it is not possible to turn a process ID into a process
981 * handle after the process terminated.
982 * Keep the handle in a list for waitpid.
984 EnterCriticalSection(&pinfo_cs);
986 struct pinfo_t *info = xmalloc(sizeof(struct pinfo_t));
987 info->pid = pi.dwProcessId;
988 info->proc = pi.hProcess;
989 info->next = pinfo;
990 pinfo = info;
992 LeaveCriticalSection(&pinfo_cs);
994 return (pid_t)pi.dwProcessId;
997 static pid_t mingw_spawnve(const char *cmd, const char **argv, char **env,
998 int prepend_cmd)
1000 return mingw_spawnve_fd(cmd, argv, env, NULL, prepend_cmd, 0, 1, 2);
1003 pid_t mingw_spawnvpe(const char *cmd, const char **argv, char **env,
1004 const char *dir,
1005 int fhin, int fhout, int fherr)
1007 pid_t pid;
1008 char **path = get_path_split();
1009 char *prog = path_lookup(cmd, path, 0);
1011 if (!prog) {
1012 errno = ENOENT;
1013 pid = -1;
1015 else {
1016 const char *interpr = parse_interpreter(prog);
1018 if (interpr) {
1019 const char *argv0 = argv[0];
1020 char *iprog = path_lookup(interpr, path, 1);
1021 argv[0] = prog;
1022 if (!iprog) {
1023 errno = ENOENT;
1024 pid = -1;
1026 else {
1027 pid = mingw_spawnve_fd(iprog, argv, env, dir, 1,
1028 fhin, fhout, fherr);
1029 free(iprog);
1031 argv[0] = argv0;
1033 else
1034 pid = mingw_spawnve_fd(prog, argv, env, dir, 0,
1035 fhin, fhout, fherr);
1036 free(prog);
1038 free_path_split(path);
1039 return pid;
1042 static int try_shell_exec(const char *cmd, char *const *argv, char **env)
1044 const char *interpr = parse_interpreter(cmd);
1045 char **path;
1046 char *prog;
1047 int pid = 0;
1049 if (!interpr)
1050 return 0;
1051 path = get_path_split();
1052 prog = path_lookup(interpr, path, 1);
1053 if (prog) {
1054 int argc = 0;
1055 const char **argv2;
1056 while (argv[argc]) argc++;
1057 argv2 = xmalloc(sizeof(*argv) * (argc+1));
1058 argv2[0] = (char *)cmd; /* full path to the script file */
1059 memcpy(&argv2[1], &argv[1], sizeof(*argv) * argc);
1060 pid = mingw_spawnve(prog, argv2, env, 1);
1061 if (pid >= 0) {
1062 int status;
1063 if (waitpid(pid, &status, 0) < 0)
1064 status = 255;
1065 exit(status);
1067 pid = 1; /* indicate that we tried but failed */
1068 free(prog);
1069 free(argv2);
1071 free_path_split(path);
1072 return pid;
1075 static void mingw_execve(const char *cmd, char *const *argv, char *const *env)
1077 /* check if git_command is a shell script */
1078 if (!try_shell_exec(cmd, argv, (char **)env)) {
1079 int pid, status;
1081 pid = mingw_spawnve(cmd, (const char **)argv, (char **)env, 0);
1082 if (pid < 0)
1083 return;
1084 if (waitpid(pid, &status, 0) < 0)
1085 status = 255;
1086 exit(status);
1090 void mingw_execvp(const char *cmd, char *const *argv)
1092 char **path = get_path_split();
1093 char *prog = path_lookup(cmd, path, 0);
1095 if (prog) {
1096 mingw_execve(prog, argv, environ);
1097 free(prog);
1098 } else
1099 errno = ENOENT;
1101 free_path_split(path);
1104 void mingw_execv(const char *cmd, char *const *argv)
1106 mingw_execve(cmd, argv, environ);
1109 int mingw_kill(pid_t pid, int sig)
1111 if (pid > 0 && sig == SIGTERM) {
1112 HANDLE h = OpenProcess(PROCESS_TERMINATE, FALSE, pid);
1114 if (TerminateProcess(h, -1)) {
1115 CloseHandle(h);
1116 return 0;
1119 errno = err_win_to_posix(GetLastError());
1120 CloseHandle(h);
1121 return -1;
1124 errno = EINVAL;
1125 return -1;
1128 static char **copy_environ(void)
1130 char **env;
1131 int i = 0;
1132 while (environ[i])
1133 i++;
1134 env = xmalloc((i+1)*sizeof(*env));
1135 for (i = 0; environ[i]; i++)
1136 env[i] = xstrdup(environ[i]);
1137 env[i] = NULL;
1138 return env;
1141 void free_environ(char **env)
1143 int i;
1144 for (i = 0; env[i]; i++)
1145 free(env[i]);
1146 free(env);
1149 static int lookup_env(char **env, const char *name, size_t nmln)
1151 int i;
1153 for (i = 0; env[i]; i++) {
1154 if (0 == strncmp(env[i], name, nmln)
1155 && '=' == env[i][nmln])
1156 /* matches */
1157 return i;
1159 return -1;
1163 * If name contains '=', then sets the variable, otherwise it unsets it
1165 static char **env_setenv(char **env, const char *name)
1167 char *eq = strchrnul(name, '=');
1168 int i = lookup_env(env, name, eq-name);
1170 if (i < 0) {
1171 if (*eq) {
1172 for (i = 0; env[i]; i++)
1174 env = xrealloc(env, (i+2)*sizeof(*env));
1175 env[i] = xstrdup(name);
1176 env[i+1] = NULL;
1179 else {
1180 free(env[i]);
1181 if (*eq)
1182 env[i] = xstrdup(name);
1183 else
1184 for (; env[i]; i++)
1185 env[i] = env[i+1];
1187 return env;
1191 * Copies global environ and adjusts variables as specified by vars.
1193 char **make_augmented_environ(const char *const *vars)
1195 char **env = copy_environ();
1197 while (*vars)
1198 env = env_setenv(env, *vars++);
1199 return env;
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.
1208 static int WSAAPI getaddrinfo_stub(const char *node, const char *service,
1209 const struct addrinfo *hints,
1210 struct addrinfo **res)
1212 struct hostent *h = NULL;
1213 struct addrinfo *ai;
1214 struct sockaddr_in *sin;
1216 if (node) {
1217 h = gethostbyname(node);
1218 if (!h)
1219 return WSAGetLastError();
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;
1238 ai->ai_addrlen = sizeof(struct sockaddr_in);
1239 if (hints && (hints->ai_flags & AI_CANONNAME))
1240 ai->ai_canonname = h ? strdup(h->h_name) : NULL;
1241 else
1242 ai->ai_canonname = NULL;
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;
1263 static void WSAAPI freeaddrinfo_stub(struct addrinfo *res)
1265 free(res->ai_canonname);
1266 free(res->ai_addr);
1267 free(res);
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)
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;
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);
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));
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");
1300 if (ent)
1301 snprintf(serv, servlen, "%s", ent->s_name);
1302 else
1303 snprintf(serv, servlen, "%d", ntohs(sin->sin_port));
1306 return 0;
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);
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.
1322 static void socket_cleanup(void)
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;
1333 static void ensure_socket_initialization(void)
1335 WSADATA wsa;
1336 static int initialized = 0;
1337 const char *libraries[] = { "ws2_32.dll", "wship6.dll", NULL };
1338 const char **name;
1340 if (initialized)
1341 return;
1343 if (WSAStartup(MAKEWORD(2,2), &wsa))
1344 die("unable to initialize winsock subsystem, error %d",
1345 WSAGetLastError());
1347 for (name = libraries; *name; name++) {
1348 ipv6_dll = LoadLibrary(*name);
1349 if (!ipv6_dll)
1350 continue;
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;
1368 if (!ipv6_freeaddrinfo || !ipv6_getaddrinfo || !ipv6_getnameinfo) {
1369 ipv6_freeaddrinfo = freeaddrinfo_stub;
1370 ipv6_getaddrinfo = getaddrinfo_stub;
1371 ipv6_getnameinfo = getnameinfo_stub;
1374 atexit(socket_cleanup);
1375 initialized = 1;
1378 #undef gethostbyname
1379 struct hostent *mingw_gethostbyname(const char *host)
1381 ensure_socket_initialization();
1382 return gethostbyname(host);
1385 void mingw_freeaddrinfo(struct addrinfo *res)
1387 ipv6_freeaddrinfo(res);
1390 int mingw_getaddrinfo(const char *node, const char *service,
1391 const struct addrinfo *hints, struct addrinfo **res)
1393 ensure_socket_initialization();
1394 return ipv6_getaddrinfo(node, service, hints, res);
1397 int mingw_getnameinfo(const struct sockaddr *sa, socklen_t salen,
1398 char *host, DWORD hostlen, char *serv, DWORD servlen,
1399 int flags)
1401 ensure_socket_initialization();
1402 return ipv6_getnameinfo(sa, salen, host, hostlen, serv, servlen, flags);
1405 int mingw_socket(int domain, int type, int protocol)
1407 int sockfd;
1408 SOCKET s;
1410 ensure_socket_initialization();
1411 s = WSASocket(domain, type, protocol, NULL, 0, 0);
1412 if (s == INVALID_SOCKET) {
1414 * WSAGetLastError() values are regular BSD error codes
1415 * biased by WSABASEERR.
1416 * However, strerror() does not know about networking
1417 * specific errors, which are values beginning at 38 or so.
1418 * Therefore, we choose to leave the biased error code
1419 * in errno so that _if_ someone looks up the code somewhere,
1420 * then it is at least the number that are usually listed.
1422 errno = WSAGetLastError();
1423 return -1;
1425 /* convert into a file descriptor */
1426 if ((sockfd = _open_osfhandle(s, O_RDWR|O_BINARY)) < 0) {
1427 closesocket(s);
1428 return error("unable to make a socket file descriptor: %s",
1429 strerror(errno));
1431 return sockfd;
1434 #undef connect
1435 int mingw_connect(int sockfd, struct sockaddr *sa, size_t sz)
1437 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
1438 return connect(s, sa, sz);
1441 #undef bind
1442 int mingw_bind(int sockfd, struct sockaddr *sa, size_t sz)
1444 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
1445 return bind(s, sa, sz);
1448 #undef setsockopt
1449 int mingw_setsockopt(int sockfd, int lvl, int optname, void *optval, int optlen)
1451 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
1452 return setsockopt(s, lvl, optname, (const char*)optval, optlen);
1455 #undef shutdown
1456 int mingw_shutdown(int sockfd, int how)
1458 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
1459 return shutdown(s, how);
1462 #undef listen
1463 int mingw_listen(int sockfd, int backlog)
1465 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
1466 return listen(s, backlog);
1469 #undef accept
1470 int mingw_accept(int sockfd1, struct sockaddr *sa, socklen_t *sz)
1472 int sockfd2;
1474 SOCKET s1 = (SOCKET)_get_osfhandle(sockfd1);
1475 SOCKET s2 = accept(s1, sa, sz);
1477 /* convert into a file descriptor */
1478 if ((sockfd2 = _open_osfhandle(s2, O_RDWR|O_BINARY)) < 0) {
1479 int err = errno;
1480 closesocket(s2);
1481 return error("unable to make a socket file descriptor: %s",
1482 strerror(err));
1484 return sockfd2;
1487 #undef rename
1488 int mingw_rename(const char *pold, const char *pnew)
1490 DWORD attrs, gle;
1491 int tries = 0;
1494 * Try native rename() first to get errno right.
1495 * It is based on MoveFile(), which cannot overwrite existing files.
1497 if (!rename(pold, pnew))
1498 return 0;
1499 if (errno != EEXIST)
1500 return -1;
1501 repeat:
1502 if (MoveFileEx(pold, pnew, MOVEFILE_REPLACE_EXISTING))
1503 return 0;
1504 /* TODO: translate more errors */
1505 gle = GetLastError();
1506 if (gle == ERROR_ACCESS_DENIED &&
1507 (attrs = GetFileAttributes(pnew)) != INVALID_FILE_ATTRIBUTES) {
1508 if (attrs & FILE_ATTRIBUTE_DIRECTORY) {
1509 errno = EISDIR;
1510 return -1;
1512 if ((attrs & FILE_ATTRIBUTE_READONLY) &&
1513 SetFileAttributes(pnew, attrs & ~FILE_ATTRIBUTE_READONLY)) {
1514 if (MoveFileEx(pold, pnew, MOVEFILE_REPLACE_EXISTING))
1515 return 0;
1516 gle = GetLastError();
1517 /* revert file attributes on failure */
1518 SetFileAttributes(pnew, attrs);
1521 if (tries < ARRAY_SIZE(delay) && gle == ERROR_ACCESS_DENIED) {
1523 * We assume that some other process had the source or
1524 * destination file open at the wrong moment and retry.
1525 * In order to give the other process a higher chance to
1526 * complete its operation, we give up our time slice now.
1527 * If we have to retry again, we do sleep a bit.
1529 Sleep(delay[tries]);
1530 tries++;
1531 goto repeat;
1533 if (gle == ERROR_ACCESS_DENIED &&
1534 ask_yes_no_if_possible("Rename from '%s' to '%s' failed. "
1535 "Should I try again?", pold, pnew))
1536 goto repeat;
1538 errno = EACCES;
1539 return -1;
1543 * Note that this doesn't return the actual pagesize, but
1544 * the allocation granularity. If future Windows specific git code
1545 * needs the real getpagesize function, we need to find another solution.
1547 int mingw_getpagesize(void)
1549 SYSTEM_INFO si;
1550 GetSystemInfo(&si);
1551 return si.dwAllocationGranularity;
1554 struct passwd *getpwuid(int uid)
1556 static char user_name[100];
1557 static struct passwd p;
1559 DWORD len = sizeof(user_name);
1560 if (!GetUserName(user_name, &len))
1561 return NULL;
1562 p.pw_name = user_name;
1563 p.pw_gecos = "unknown";
1564 p.pw_dir = NULL;
1565 return &p;
1568 static HANDLE timer_event;
1569 static HANDLE timer_thread;
1570 static int timer_interval;
1571 static int one_shot;
1572 static sig_handler_t timer_fn = SIG_DFL;
1574 /* The timer works like this:
1575 * The thread, ticktack(), is a trivial routine that most of the time
1576 * only waits to receive the signal to terminate. The main thread tells
1577 * the thread to terminate by setting the timer_event to the signalled
1578 * state.
1579 * But ticktack() interrupts the wait state after the timer's interval
1580 * length to call the signal handler.
1583 static unsigned __stdcall ticktack(void *dummy)
1585 while (WaitForSingleObject(timer_event, timer_interval) == WAIT_TIMEOUT) {
1586 if (timer_fn == SIG_DFL)
1587 die("Alarm");
1588 if (timer_fn != SIG_IGN)
1589 timer_fn(SIGALRM);
1590 if (one_shot)
1591 break;
1593 return 0;
1596 static int start_timer_thread(void)
1598 timer_event = CreateEvent(NULL, FALSE, FALSE, NULL);
1599 if (timer_event) {
1600 timer_thread = (HANDLE) _beginthreadex(NULL, 0, ticktack, NULL, 0, NULL);
1601 if (!timer_thread )
1602 return errno = ENOMEM,
1603 error("cannot start timer thread");
1604 } else
1605 return errno = ENOMEM,
1606 error("cannot allocate resources for timer");
1607 return 0;
1610 static void stop_timer_thread(void)
1612 if (timer_event)
1613 SetEvent(timer_event); /* tell thread to terminate */
1614 if (timer_thread) {
1615 int rc = WaitForSingleObject(timer_thread, 1000);
1616 if (rc == WAIT_TIMEOUT)
1617 error("timer thread did not terminate timely");
1618 else if (rc != WAIT_OBJECT_0)
1619 error("waiting for timer thread failed: %lu",
1620 GetLastError());
1621 CloseHandle(timer_thread);
1623 if (timer_event)
1624 CloseHandle(timer_event);
1625 timer_event = NULL;
1626 timer_thread = NULL;
1629 static inline int is_timeval_eq(const struct timeval *i1, const struct timeval *i2)
1631 return i1->tv_sec == i2->tv_sec && i1->tv_usec == i2->tv_usec;
1634 int setitimer(int type, struct itimerval *in, struct itimerval *out)
1636 static const struct timeval zero;
1637 static int atexit_done;
1639 if (out != NULL)
1640 return errno = EINVAL,
1641 error("setitimer param 3 != NULL not implemented");
1642 if (!is_timeval_eq(&in->it_interval, &zero) &&
1643 !is_timeval_eq(&in->it_interval, &in->it_value))
1644 return errno = EINVAL,
1645 error("setitimer: it_interval must be zero or eq it_value");
1647 if (timer_thread)
1648 stop_timer_thread();
1650 if (is_timeval_eq(&in->it_value, &zero) &&
1651 is_timeval_eq(&in->it_interval, &zero))
1652 return 0;
1654 timer_interval = in->it_value.tv_sec * 1000 + in->it_value.tv_usec / 1000;
1655 one_shot = is_timeval_eq(&in->it_interval, &zero);
1656 if (!atexit_done) {
1657 atexit(stop_timer_thread);
1658 atexit_done = 1;
1660 return start_timer_thread();
1663 int sigaction(int sig, struct sigaction *in, struct sigaction *out)
1665 if (sig != SIGALRM)
1666 return errno = EINVAL,
1667 error("sigaction only implemented for SIGALRM");
1668 if (out != NULL)
1669 return errno = EINVAL,
1670 error("sigaction: param 3 != NULL not implemented");
1672 timer_fn = in->sa_handler;
1673 return 0;
1676 #undef signal
1677 sig_handler_t mingw_signal(int sig, sig_handler_t handler)
1679 sig_handler_t old = timer_fn;
1680 if (sig != SIGALRM)
1681 return signal(sig, handler);
1682 timer_fn = handler;
1683 return old;
1686 static const char *make_backslash_path(const char *path)
1688 static char buf[PATH_MAX + 1];
1689 char *c;
1691 if (strlcpy(buf, path, PATH_MAX) >= PATH_MAX)
1692 die("Too long path: %.*s", 60, path);
1694 for (c = buf; *c; c++) {
1695 if (*c == '/')
1696 *c = '\\';
1698 return buf;
1701 void mingw_open_html(const char *unixpath)
1703 const char *htmlpath = make_backslash_path(unixpath);
1704 typedef HINSTANCE (WINAPI *T)(HWND, const char *,
1705 const char *, const char *, const char *, INT);
1706 T ShellExecute;
1707 HMODULE shell32;
1708 int r;
1710 shell32 = LoadLibrary("shell32.dll");
1711 if (!shell32)
1712 die("cannot load shell32.dll");
1713 ShellExecute = (T)GetProcAddress(shell32, "ShellExecuteA");
1714 if (!ShellExecute)
1715 die("cannot run browser");
1717 printf("Launching default browser to display HTML ...\n");
1718 r = (int)ShellExecute(NULL, "open", htmlpath, NULL, "\\", SW_SHOWNORMAL);
1719 FreeLibrary(shell32);
1720 /* see the MSDN documentation referring to the result codes here */
1721 if (r <= 32) {
1722 die("failed to launch browser for %.*s", MAX_PATH, unixpath);
1726 int link(const char *oldpath, const char *newpath)
1728 typedef BOOL (WINAPI *T)(const char*, const char*, LPSECURITY_ATTRIBUTES);
1729 static T create_hard_link = NULL;
1730 if (!create_hard_link) {
1731 create_hard_link = (T) GetProcAddress(
1732 GetModuleHandle("kernel32.dll"), "CreateHardLinkA");
1733 if (!create_hard_link)
1734 create_hard_link = (T)-1;
1736 if (create_hard_link == (T)-1) {
1737 errno = ENOSYS;
1738 return -1;
1740 if (!create_hard_link(newpath, oldpath, NULL)) {
1741 errno = err_win_to_posix(GetLastError());
1742 return -1;
1744 return 0;
1747 char *getpass(const char *prompt)
1749 struct strbuf buf = STRBUF_INIT;
1751 fputs(prompt, stderr);
1752 for (;;) {
1753 char c = _getch();
1754 if (c == '\r' || c == '\n')
1755 break;
1756 strbuf_addch(&buf, c);
1758 fputs("\n", stderr);
1759 return strbuf_detach(&buf, NULL);
1762 pid_t waitpid(pid_t pid, int *status, unsigned options)
1764 HANDLE h = OpenProcess(SYNCHRONIZE | PROCESS_QUERY_INFORMATION,
1765 FALSE, pid);
1766 if (!h) {
1767 errno = ECHILD;
1768 return -1;
1771 if (pid > 0 && options & WNOHANG) {
1772 if (WAIT_OBJECT_0 != WaitForSingleObject(h, 0)) {
1773 CloseHandle(h);
1774 return 0;
1776 options &= ~WNOHANG;
1779 if (options == 0) {
1780 struct pinfo_t **ppinfo;
1781 if (WaitForSingleObject(h, INFINITE) != WAIT_OBJECT_0) {
1782 CloseHandle(h);
1783 return 0;
1786 if (status)
1787 GetExitCodeProcess(h, (LPDWORD)status);
1789 EnterCriticalSection(&pinfo_cs);
1791 ppinfo = &pinfo;
1792 while (*ppinfo) {
1793 struct pinfo_t *info = *ppinfo;
1794 if (info->pid == pid) {
1795 CloseHandle(info->proc);
1796 *ppinfo = info->next;
1797 free(info);
1798 break;
1800 ppinfo = &info->next;
1803 LeaveCriticalSection(&pinfo_cs);
1805 CloseHandle(h);
1806 return pid;
1808 CloseHandle(h);
1810 errno = EINVAL;
1811 return -1;
1814 const char *get_windows_home_directory(void)
1816 static const char *home_directory = NULL;
1817 struct strbuf buf = STRBUF_INIT;
1819 if (home_directory)
1820 return home_directory;
1822 home_directory = getenv("HOME");
1823 if (home_directory && *home_directory)
1824 return home_directory;
1826 strbuf_addf(&buf, "%s/%s", getenv("HOMEDRIVE"), getenv("HOMEPATH"));
1827 home_directory = strbuf_detach(&buf, NULL);
1829 return home_directory;
1832 int mingw_offset_1st_component(const char *path)
1834 int offset = 0;
1835 if (has_dos_drive_prefix(path))
1836 offset = 2;
1838 /* unc paths */
1839 else if (is_dir_sep(path[0]) && is_dir_sep(path[1])) {
1841 /* skip server name */
1842 char *pos = strpbrk(path + 2, "\\/");
1843 if (!pos)
1844 return 0; /* Error: malformed unc path */
1846 do {
1847 pos++;
1848 } while (*pos && !is_dir_sep(*pos));
1850 offset = pos - path;
1853 return offset + is_dir_sep(path[offset]);
1857 * Disable MSVCRT command line wildcard expansion (__getmainargs called from
1858 * mingw startup code, see init.c in mingw runtime).
1860 int _CRT_glob = 0;
1862 void mingw_startup()
1864 /* copy executable name to argv[0] */
1865 __argv[0] = xstrdup(_pgmptr);
1867 /* initialize critical section for waitpid pinfo_t list */
1868 InitializeCriticalSection(&pinfo_cs);
1870 /* set up default file mode and file modes for stdin/out/err */
1871 _fmode = _O_BINARY;
1872 _setmode(_fileno(stdin), _O_BINARY);
1873 _setmode(_fileno(stdout), _O_BINARY);
1874 _setmode(_fileno(stderr), _O_BINARY);