Add MinGW-specific execv() override.
[git.git] / compat / mingw.c
blob6590f33cc8157f61ff7b6e0f6330bacf465ad39c
1 #include "../git-compat-util.h"
2 #include "win32.h"
3 #include <conio.h>
4 #include "../strbuf.h"
6 int err_win_to_posix(DWORD winerr)
8 int error = ENOSYS;
9 switch(winerr) {
10 case ERROR_ACCESS_DENIED: error = EACCES; break;
11 case ERROR_ACCOUNT_DISABLED: error = EACCES; break;
12 case ERROR_ACCOUNT_RESTRICTION: error = EACCES; break;
13 case ERROR_ALREADY_ASSIGNED: error = EBUSY; break;
14 case ERROR_ALREADY_EXISTS: error = EEXIST; break;
15 case ERROR_ARITHMETIC_OVERFLOW: error = ERANGE; break;
16 case ERROR_BAD_COMMAND: error = EIO; break;
17 case ERROR_BAD_DEVICE: error = ENODEV; break;
18 case ERROR_BAD_DRIVER_LEVEL: error = ENXIO; break;
19 case ERROR_BAD_EXE_FORMAT: error = ENOEXEC; break;
20 case ERROR_BAD_FORMAT: error = ENOEXEC; break;
21 case ERROR_BAD_LENGTH: error = EINVAL; break;
22 case ERROR_BAD_PATHNAME: error = ENOENT; break;
23 case ERROR_BAD_PIPE: error = EPIPE; break;
24 case ERROR_BAD_UNIT: error = ENODEV; break;
25 case ERROR_BAD_USERNAME: error = EINVAL; break;
26 case ERROR_BROKEN_PIPE: error = EPIPE; break;
27 case ERROR_BUFFER_OVERFLOW: error = ENAMETOOLONG; break;
28 case ERROR_BUSY: error = EBUSY; break;
29 case ERROR_BUSY_DRIVE: error = EBUSY; break;
30 case ERROR_CALL_NOT_IMPLEMENTED: error = ENOSYS; break;
31 case ERROR_CANNOT_MAKE: error = EACCES; break;
32 case ERROR_CANTOPEN: error = EIO; break;
33 case ERROR_CANTREAD: error = EIO; break;
34 case ERROR_CANTWRITE: error = EIO; break;
35 case ERROR_CRC: error = EIO; break;
36 case ERROR_CURRENT_DIRECTORY: error = EACCES; break;
37 case ERROR_DEVICE_IN_USE: error = EBUSY; break;
38 case ERROR_DEV_NOT_EXIST: error = ENODEV; break;
39 case ERROR_DIRECTORY: error = EINVAL; break;
40 case ERROR_DIR_NOT_EMPTY: error = ENOTEMPTY; break;
41 case ERROR_DISK_CHANGE: error = EIO; break;
42 case ERROR_DISK_FULL: error = ENOSPC; break;
43 case ERROR_DRIVE_LOCKED: error = EBUSY; break;
44 case ERROR_ENVVAR_NOT_FOUND: error = EINVAL; break;
45 case ERROR_EXE_MARKED_INVALID: error = ENOEXEC; break;
46 case ERROR_FILENAME_EXCED_RANGE: error = ENAMETOOLONG; break;
47 case ERROR_FILE_EXISTS: error = EEXIST; break;
48 case ERROR_FILE_INVALID: error = ENODEV; break;
49 case ERROR_FILE_NOT_FOUND: error = ENOENT; break;
50 case ERROR_GEN_FAILURE: error = EIO; break;
51 case ERROR_HANDLE_DISK_FULL: error = ENOSPC; break;
52 case ERROR_INSUFFICIENT_BUFFER: error = ENOMEM; break;
53 case ERROR_INVALID_ACCESS: error = EACCES; break;
54 case ERROR_INVALID_ADDRESS: error = EFAULT; break;
55 case ERROR_INVALID_BLOCK: error = EFAULT; break;
56 case ERROR_INVALID_DATA: error = EINVAL; break;
57 case ERROR_INVALID_DRIVE: error = ENODEV; break;
58 case ERROR_INVALID_EXE_SIGNATURE: error = ENOEXEC; break;
59 case ERROR_INVALID_FLAGS: error = EINVAL; break;
60 case ERROR_INVALID_FUNCTION: error = ENOSYS; break;
61 case ERROR_INVALID_HANDLE: error = EBADF; break;
62 case ERROR_INVALID_LOGON_HOURS: error = EACCES; break;
63 case ERROR_INVALID_NAME: error = EINVAL; break;
64 case ERROR_INVALID_OWNER: error = EINVAL; break;
65 case ERROR_INVALID_PARAMETER: error = EINVAL; break;
66 case ERROR_INVALID_PASSWORD: error = EPERM; break;
67 case ERROR_INVALID_PRIMARY_GROUP: error = EINVAL; break;
68 case ERROR_INVALID_SIGNAL_NUMBER: error = EINVAL; break;
69 case ERROR_INVALID_TARGET_HANDLE: error = EIO; break;
70 case ERROR_INVALID_WORKSTATION: error = EACCES; break;
71 case ERROR_IO_DEVICE: error = EIO; break;
72 case ERROR_IO_INCOMPLETE: error = EINTR; break;
73 case ERROR_LOCKED: error = EBUSY; break;
74 case ERROR_LOCK_VIOLATION: error = EACCES; break;
75 case ERROR_LOGON_FAILURE: error = EACCES; break;
76 case ERROR_MAPPED_ALIGNMENT: error = EINVAL; break;
77 case ERROR_META_EXPANSION_TOO_LONG: error = E2BIG; break;
78 case ERROR_MORE_DATA: error = EPIPE; break;
79 case ERROR_NEGATIVE_SEEK: error = ESPIPE; break;
80 case ERROR_NOACCESS: error = EFAULT; break;
81 case ERROR_NONE_MAPPED: error = EINVAL; break;
82 case ERROR_NOT_ENOUGH_MEMORY: error = ENOMEM; break;
83 case ERROR_NOT_READY: error = EAGAIN; break;
84 case ERROR_NOT_SAME_DEVICE: error = EXDEV; break;
85 case ERROR_NO_DATA: error = EPIPE; break;
86 case ERROR_NO_MORE_SEARCH_HANDLES: error = EIO; break;
87 case ERROR_NO_PROC_SLOTS: error = EAGAIN; break;
88 case ERROR_NO_SUCH_PRIVILEGE: error = EACCES; break;
89 case ERROR_OPEN_FAILED: error = EIO; break;
90 case ERROR_OPEN_FILES: error = EBUSY; break;
91 case ERROR_OPERATION_ABORTED: error = EINTR; break;
92 case ERROR_OUTOFMEMORY: error = ENOMEM; break;
93 case ERROR_PASSWORD_EXPIRED: error = EACCES; break;
94 case ERROR_PATH_BUSY: error = EBUSY; break;
95 case ERROR_PATH_NOT_FOUND: error = ENOENT; break;
96 case ERROR_PIPE_BUSY: error = EBUSY; break;
97 case ERROR_PIPE_CONNECTED: error = EPIPE; break;
98 case ERROR_PIPE_LISTENING: error = EPIPE; break;
99 case ERROR_PIPE_NOT_CONNECTED: error = EPIPE; break;
100 case ERROR_PRIVILEGE_NOT_HELD: error = EACCES; break;
101 case ERROR_READ_FAULT: error = EIO; break;
102 case ERROR_SEEK: error = EIO; break;
103 case ERROR_SEEK_ON_DEVICE: error = ESPIPE; break;
104 case ERROR_SHARING_BUFFER_EXCEEDED: error = ENFILE; break;
105 case ERROR_SHARING_VIOLATION: error = EACCES; break;
106 case ERROR_STACK_OVERFLOW: error = ENOMEM; break;
107 case ERROR_SWAPERROR: error = ENOENT; break;
108 case ERROR_TOO_MANY_MODULES: error = EMFILE; break;
109 case ERROR_TOO_MANY_OPEN_FILES: error = EMFILE; break;
110 case ERROR_UNRECOGNIZED_MEDIA: error = ENXIO; break;
111 case ERROR_UNRECOGNIZED_VOLUME: error = ENODEV; break;
112 case ERROR_WAIT_NO_CHILDREN: error = ECHILD; break;
113 case ERROR_WRITE_FAULT: error = EIO; break;
114 case ERROR_WRITE_PROTECT: error = EROFS; break;
116 return error;
119 #undef open
120 int mingw_open (const char *filename, int oflags, ...)
122 va_list args;
123 unsigned mode;
124 int fd;
126 va_start(args, oflags);
127 mode = va_arg(args, int);
128 va_end(args);
130 if (filename && !strcmp(filename, "/dev/null"))
131 filename = "nul";
133 fd = open(filename, oflags, mode);
135 if (fd < 0 && (oflags & O_CREAT) && errno == EACCES) {
136 DWORD attrs = GetFileAttributes(filename);
137 if (attrs != INVALID_FILE_ATTRIBUTES && (attrs & FILE_ATTRIBUTE_DIRECTORY))
138 errno = EISDIR;
140 return fd;
143 #undef write
144 ssize_t mingw_write(int fd, const void *buf, size_t count)
147 * While write() calls to a file on a local disk are translated
148 * into WriteFile() calls with a maximum size of 64KB on Windows
149 * XP and 256KB on Vista, no such cap is placed on writes to
150 * files over the network on Windows XP. Unfortunately, there
151 * seems to be a limit of 32MB-28KB on X64 and 64MB-32KB on x86;
152 * bigger writes fail on Windows XP.
153 * So we cap to a nice 31MB here to avoid write failures over
154 * the net without changing the number of WriteFile() calls in
155 * the local case.
157 return write(fd, buf, min(count, 31 * 1024 * 1024));
160 #undef fopen
161 FILE *mingw_fopen (const char *filename, const char *otype)
163 if (filename && !strcmp(filename, "/dev/null"))
164 filename = "nul";
165 return fopen(filename, otype);
168 #undef freopen
169 FILE *mingw_freopen (const char *filename, const char *otype, FILE *stream)
171 if (filename && !strcmp(filename, "/dev/null"))
172 filename = "nul";
173 return freopen(filename, otype, stream);
177 * The unit of FILETIME is 100-nanoseconds since January 1, 1601, UTC.
178 * Returns the 100-nanoseconds ("hekto nanoseconds") since the epoch.
180 static inline long long filetime_to_hnsec(const FILETIME *ft)
182 long long winTime = ((long long)ft->dwHighDateTime << 32) + ft->dwLowDateTime;
183 /* Windows to Unix Epoch conversion */
184 return winTime - 116444736000000000LL;
187 static inline time_t filetime_to_time_t(const FILETIME *ft)
189 return (time_t)(filetime_to_hnsec(ft) / 10000000);
192 /* We keep the do_lstat code in a separate function to avoid recursion.
193 * When a path ends with a slash, the stat will fail with ENOENT. In
194 * this case, we strip the trailing slashes and stat again.
196 * If follow is true then act like stat() and report on the link
197 * target. Otherwise report on the link itself.
199 static int do_lstat(int follow, const char *file_name, struct stat *buf)
201 WIN32_FILE_ATTRIBUTE_DATA fdata;
203 if (!(errno = get_file_attr(file_name, &fdata))) {
204 buf->st_ino = 0;
205 buf->st_gid = 0;
206 buf->st_uid = 0;
207 buf->st_nlink = 1;
208 buf->st_mode = file_attr_to_st_mode(fdata.dwFileAttributes);
209 buf->st_size = fdata.nFileSizeLow |
210 (((off_t)fdata.nFileSizeHigh)<<32);
211 buf->st_dev = buf->st_rdev = 0; /* not used by Git */
212 buf->st_atime = filetime_to_time_t(&(fdata.ftLastAccessTime));
213 buf->st_mtime = filetime_to_time_t(&(fdata.ftLastWriteTime));
214 buf->st_ctime = filetime_to_time_t(&(fdata.ftCreationTime));
215 if (fdata.dwFileAttributes & FILE_ATTRIBUTE_REPARSE_POINT) {
216 WIN32_FIND_DATAA findbuf;
217 HANDLE handle = FindFirstFileA(file_name, &findbuf);
218 if (handle != INVALID_HANDLE_VALUE) {
219 if ((findbuf.dwFileAttributes & FILE_ATTRIBUTE_REPARSE_POINT) &&
220 (findbuf.dwReserved0 == IO_REPARSE_TAG_SYMLINK)) {
221 if (follow) {
222 char buffer[MAXIMUM_REPARSE_DATA_BUFFER_SIZE];
223 buf->st_size = readlink(file_name, buffer, MAXIMUM_REPARSE_DATA_BUFFER_SIZE);
224 } else {
225 buf->st_mode = S_IFLNK;
227 buf->st_mode |= S_IREAD;
228 if (!(findbuf.dwFileAttributes & FILE_ATTRIBUTE_READONLY))
229 buf->st_mode |= S_IWRITE;
231 FindClose(handle);
234 return 0;
236 return -1;
239 /* We provide our own lstat/fstat functions, since the provided
240 * lstat/fstat functions are so slow. These stat functions are
241 * tailored for Git's usage (read: fast), and are not meant to be
242 * complete. Note that Git stat()s are redirected to mingw_lstat()
243 * too, since Windows doesn't really handle symlinks that well.
245 static int do_stat_internal(int follow, const char *file_name, struct stat *buf)
247 int namelen;
248 static char alt_name[PATH_MAX];
250 if (!do_lstat(follow, file_name, buf))
251 return 0;
253 /* if file_name ended in a '/', Windows returned ENOENT;
254 * try again without trailing slashes
256 if (errno != ENOENT)
257 return -1;
259 namelen = strlen(file_name);
260 if (namelen && file_name[namelen-1] != '/')
261 return -1;
262 while (namelen && file_name[namelen-1] == '/')
263 --namelen;
264 if (!namelen || namelen >= PATH_MAX)
265 return -1;
267 memcpy(alt_name, file_name, namelen);
268 alt_name[namelen] = 0;
269 return do_lstat(follow, alt_name, buf);
272 int mingw_lstat(const char *file_name, struct stat *buf)
274 return do_stat_internal(0, file_name, buf);
276 int mingw_stat(const char *file_name, struct stat *buf)
278 return do_stat_internal(1, file_name, buf);
281 #undef fstat
282 int mingw_fstat(int fd, struct stat *buf)
284 HANDLE fh = (HANDLE)_get_osfhandle(fd);
285 BY_HANDLE_FILE_INFORMATION fdata;
287 if (fh == INVALID_HANDLE_VALUE) {
288 errno = EBADF;
289 return -1;
291 /* direct non-file handles to MS's fstat() */
292 if (GetFileType(fh) != FILE_TYPE_DISK)
293 return _fstati64(fd, buf);
295 if (GetFileInformationByHandle(fh, &fdata)) {
296 buf->st_ino = 0;
297 buf->st_gid = 0;
298 buf->st_uid = 0;
299 buf->st_nlink = 1;
300 buf->st_mode = file_attr_to_st_mode(fdata.dwFileAttributes);
301 buf->st_size = fdata.nFileSizeLow |
302 (((off_t)fdata.nFileSizeHigh)<<32);
303 buf->st_dev = buf->st_rdev = 0; /* not used by Git */
304 buf->st_atime = filetime_to_time_t(&(fdata.ftLastAccessTime));
305 buf->st_mtime = filetime_to_time_t(&(fdata.ftLastWriteTime));
306 buf->st_ctime = filetime_to_time_t(&(fdata.ftCreationTime));
307 return 0;
309 errno = EBADF;
310 return -1;
313 static inline void time_t_to_filetime(time_t t, FILETIME *ft)
315 long long winTime = t * 10000000LL + 116444736000000000LL;
316 ft->dwLowDateTime = winTime;
317 ft->dwHighDateTime = winTime >> 32;
320 int mingw_utime (const char *file_name, const struct utimbuf *times)
322 FILETIME mft, aft;
323 int fh, rc;
325 /* must have write permission */
326 DWORD attrs = GetFileAttributes(file_name);
327 if (attrs != INVALID_FILE_ATTRIBUTES &&
328 (attrs & FILE_ATTRIBUTE_READONLY)) {
329 /* ignore errors here; open() will report them */
330 SetFileAttributes(file_name, attrs & ~FILE_ATTRIBUTE_READONLY);
333 if ((fh = open(file_name, O_RDWR | O_BINARY)) < 0) {
334 rc = -1;
335 goto revert_attrs;
338 if (times) {
339 time_t_to_filetime(times->modtime, &mft);
340 time_t_to_filetime(times->actime, &aft);
341 } else {
342 GetSystemTimeAsFileTime(&mft);
343 aft = mft;
345 if (!SetFileTime((HANDLE)_get_osfhandle(fh), NULL, &aft, &mft)) {
346 errno = EINVAL;
347 rc = -1;
348 } else
349 rc = 0;
350 close(fh);
352 revert_attrs:
353 if (attrs != INVALID_FILE_ATTRIBUTES &&
354 (attrs & FILE_ATTRIBUTE_READONLY)) {
355 /* ignore errors again */
356 SetFileAttributes(file_name, attrs);
358 return rc;
361 unsigned int sleep (unsigned int seconds)
363 Sleep(seconds*1000);
364 return 0;
367 int mkstemp(char *template)
369 char *filename = mktemp(template);
370 if (filename == NULL)
371 return -1;
372 return open(filename, O_RDWR | O_CREAT, 0600);
375 int gettimeofday(struct timeval *tv, void *tz)
377 FILETIME ft;
378 long long hnsec;
380 GetSystemTimeAsFileTime(&ft);
381 hnsec = filetime_to_hnsec(&ft);
382 tv->tv_sec = hnsec / 10000000;
383 tv->tv_usec = (hnsec % 10000000) / 10;
384 return 0;
387 int pipe(int filedes[2])
389 HANDLE h[2];
391 /* this creates non-inheritable handles */
392 if (!CreatePipe(&h[0], &h[1], NULL, 8192)) {
393 errno = err_win_to_posix(GetLastError());
394 return -1;
396 filedes[0] = _open_osfhandle((int)h[0], O_NOINHERIT);
397 if (filedes[0] < 0) {
398 CloseHandle(h[0]);
399 CloseHandle(h[1]);
400 return -1;
402 filedes[1] = _open_osfhandle((int)h[1], O_NOINHERIT);
403 if (filedes[0] < 0) {
404 close(filedes[0]);
405 CloseHandle(h[1]);
406 return -1;
408 return 0;
411 int poll(struct pollfd *ufds, unsigned int nfds, int timeout)
413 int i, pending;
415 if (timeout >= 0) {
416 if (nfds == 0) {
417 Sleep(timeout);
418 return 0;
420 return errno = EINVAL, error("poll timeout not supported");
423 /* When there is only one fd to wait for, then we pretend that
424 * input is available and let the actual wait happen when the
425 * caller invokes read().
427 if (nfds == 1) {
428 if (!(ufds[0].events & POLLIN))
429 return errno = EINVAL, error("POLLIN not set");
430 ufds[0].revents = POLLIN;
431 return 0;
434 repeat:
435 pending = 0;
436 for (i = 0; i < nfds; i++) {
437 DWORD avail = 0;
438 HANDLE h = (HANDLE) _get_osfhandle(ufds[i].fd);
439 if (h == INVALID_HANDLE_VALUE)
440 return -1; /* errno was set */
442 if (!(ufds[i].events & POLLIN))
443 return errno = EINVAL, error("POLLIN not set");
445 /* this emulation works only for pipes */
446 if (!PeekNamedPipe(h, NULL, 0, NULL, &avail, NULL)) {
447 int err = GetLastError();
448 if (err == ERROR_BROKEN_PIPE) {
449 ufds[i].revents = POLLHUP;
450 pending++;
451 } else {
452 errno = EINVAL;
453 return error("PeekNamedPipe failed,"
454 " GetLastError: %u", err);
456 } else if (avail) {
457 ufds[i].revents = POLLIN;
458 pending++;
459 } else
460 ufds[i].revents = 0;
462 if (!pending) {
463 /* The only times that we spin here is when the process
464 * that is connected through the pipes is waiting for
465 * its own input data to become available. But since
466 * the process (pack-objects) is itself CPU intensive,
467 * it will happily pick up the time slice that we are
468 * relinquishing here.
470 Sleep(0);
471 goto repeat;
473 return 0;
476 struct tm *gmtime_r(const time_t *timep, struct tm *result)
478 /* gmtime() in MSVCRT.DLL is thread-safe, but not reentrant */
479 memcpy(result, gmtime(timep), sizeof(struct tm));
480 return result;
483 struct tm *localtime_r(const time_t *timep, struct tm *result)
485 /* localtime() in MSVCRT.DLL is thread-safe, but not reentrant */
486 memcpy(result, localtime(timep), sizeof(struct tm));
487 return result;
490 #undef getcwd
491 char *mingw_getcwd(char *pointer, int len)
493 int i;
494 char *ret = getcwd(pointer, len);
495 if (!ret)
496 return ret;
497 for (i = 0; pointer[i]; i++)
498 if (pointer[i] == '\\')
499 pointer[i] = '/';
500 return ret;
503 #undef getenv
504 char *mingw_getenv(const char *name)
506 char *result = getenv(name);
507 if (!result && !strcmp(name, "TMPDIR")) {
508 /* on Windows it is TMP and TEMP */
509 result = getenv("TMP");
510 if (!result)
511 result = getenv("TEMP");
513 return result;
517 * See http://msdn2.microsoft.com/en-us/library/17w5ykft(vs.71).aspx
518 * (Parsing C++ Command-Line Arguments)
520 static const char *quote_arg(const char *arg)
522 /* count chars to quote */
523 int len = 0, n = 0;
524 int force_quotes = 0;
525 char *q, *d;
526 const char *p = arg;
527 if (!*p) force_quotes = 1;
528 while (*p) {
529 if (isspace(*p) || *p == '*' || *p == '?' || *p == '{' || *p == '\'')
530 force_quotes = 1;
531 else if (*p == '"')
532 n++;
533 else if (*p == '\\') {
534 int count = 0;
535 while (*p == '\\') {
536 count++;
537 p++;
538 len++;
540 if (*p == '"')
541 n += count*2 + 1;
542 continue;
544 len++;
545 p++;
547 if (!force_quotes && n == 0)
548 return arg;
550 /* insert \ where necessary */
551 d = q = xmalloc(len+n+3);
552 *d++ = '"';
553 while (*arg) {
554 if (*arg == '"')
555 *d++ = '\\';
556 else if (*arg == '\\') {
557 int count = 0;
558 while (*arg == '\\') {
559 count++;
560 *d++ = *arg++;
562 if (*arg == '"') {
563 while (count-- > 0)
564 *d++ = '\\';
565 *d++ = '\\';
568 *d++ = *arg++;
570 *d++ = '"';
571 *d++ = 0;
572 return q;
575 static const char *parse_interpreter(const char *cmd)
577 static char buf[100];
578 char *p, *opt;
579 int n, fd;
581 /* don't even try a .exe */
582 n = strlen(cmd);
583 if (n >= 4 && !strcasecmp(cmd+n-4, ".exe"))
584 return NULL;
586 fd = open(cmd, O_RDONLY);
587 if (fd < 0)
588 return NULL;
589 n = read(fd, buf, sizeof(buf)-1);
590 close(fd);
591 if (n < 4) /* at least '#!/x' and not error */
592 return NULL;
594 if (buf[0] != '#' || buf[1] != '!')
595 return NULL;
596 buf[n] = '\0';
597 p = buf + strcspn(buf, "\r\n");
598 if (!*p)
599 return NULL;
601 *p = '\0';
602 if (!(p = strrchr(buf+2, '/')) && !(p = strrchr(buf+2, '\\')))
603 return NULL;
604 /* strip options */
605 if ((opt = strchr(p+1, ' ')))
606 *opt = '\0';
607 return p+1;
611 * Splits the PATH into parts.
613 static char **get_path_split(void)
615 char *p, **path, *envpath = getenv("PATH");
616 int i, n = 0;
618 if (!envpath || !*envpath)
619 return NULL;
621 envpath = xstrdup(envpath);
622 p = envpath;
623 while (p) {
624 char *dir = p;
625 p = strchr(p, ';');
626 if (p) *p++ = '\0';
627 if (*dir) { /* not earlier, catches series of ; */
628 ++n;
631 if (!n)
632 return NULL;
634 path = xmalloc((n+1)*sizeof(char *));
635 p = envpath;
636 i = 0;
637 do {
638 if (*p)
639 path[i++] = xstrdup(p);
640 p = p+strlen(p)+1;
641 } while (i < n);
642 path[i] = NULL;
644 free(envpath);
646 return path;
649 static void free_path_split(char **path)
651 char **p = path;
653 if (!path)
654 return;
656 while (*p)
657 free(*p++);
658 free(path);
662 * exe_only means that we only want to detect .exe files, but not scripts
663 * (which do not have an extension)
665 static char *lookup_prog(const char *dir, const char *cmd, int isexe, int exe_only)
667 char path[MAX_PATH];
668 snprintf(path, sizeof(path), "%s/%s.exe", dir, cmd);
670 if (!isexe && access(path, F_OK) == 0)
671 return xstrdup(path);
672 path[strlen(path)-4] = '\0';
673 if ((!exe_only || isexe) && access(path, F_OK) == 0)
674 if (!(GetFileAttributes(path) & FILE_ATTRIBUTE_DIRECTORY))
675 return xstrdup(path);
676 return NULL;
680 * Determines the absolute path of cmd using the split path in path.
681 * If cmd contains a slash or backslash, no lookup is performed.
683 static char *path_lookup(const char *cmd, char **path, int exe_only)
685 char *prog = NULL;
686 int len = strlen(cmd);
687 int isexe = len >= 4 && !strcasecmp(cmd+len-4, ".exe");
689 if (strchr(cmd, '/') || strchr(cmd, '\\'))
690 prog = xstrdup(cmd);
692 while (!prog && *path)
693 prog = lookup_prog(*path++, cmd, isexe, exe_only);
695 return prog;
698 static int env_compare(const void *a, const void *b)
700 char *const *ea = a;
701 char *const *eb = b;
702 return strcasecmp(*ea, *eb);
705 static pid_t mingw_spawnve_fd(const char *cmd, const char **argv, char **env,
706 const char *dir,
707 int prepend_cmd, int fhin, int fhout, int fherr)
709 STARTUPINFO si;
710 PROCESS_INFORMATION pi;
711 struct strbuf envblk, args;
712 unsigned flags;
713 BOOL ret;
715 /* Determine whether or not we are associated to a console */
716 HANDLE cons = CreateFile("CONOUT$", GENERIC_WRITE,
717 FILE_SHARE_WRITE, NULL, OPEN_EXISTING,
718 FILE_ATTRIBUTE_NORMAL, NULL);
719 if (cons == INVALID_HANDLE_VALUE) {
720 /* There is no console associated with this process.
721 * Since the child is a console process, Windows
722 * would normally create a console window. But
723 * since we'll be redirecting std streams, we do
724 * not need the console.
725 * It is necessary to use DETACHED_PROCESS
726 * instead of CREATE_NO_WINDOW to make ssh
727 * recognize that it has no console.
729 flags = DETACHED_PROCESS;
730 } else {
731 /* There is already a console. If we specified
732 * DETACHED_PROCESS here, too, Windows would
733 * disassociate the child from the console.
734 * The same is true for CREATE_NO_WINDOW.
735 * Go figure!
737 flags = 0;
738 CloseHandle(cons);
740 memset(&si, 0, sizeof(si));
741 si.cb = sizeof(si);
742 si.dwFlags = STARTF_USESTDHANDLES;
743 si.hStdInput = (HANDLE) _get_osfhandle(fhin);
744 si.hStdOutput = (HANDLE) _get_osfhandle(fhout);
745 si.hStdError = (HANDLE) _get_osfhandle(fherr);
747 /* concatenate argv, quoting args as we go */
748 strbuf_init(&args, 0);
749 if (prepend_cmd) {
750 char *quoted = (char *)quote_arg(cmd);
751 strbuf_addstr(&args, quoted);
752 if (quoted != cmd)
753 free(quoted);
755 for (; *argv; argv++) {
756 char *quoted = (char *)quote_arg(*argv);
757 if (*args.buf)
758 strbuf_addch(&args, ' ');
759 strbuf_addstr(&args, quoted);
760 if (quoted != *argv)
761 free(quoted);
764 if (env) {
765 int count = 0;
766 char **e, **sorted_env;
768 for (e = env; *e; e++)
769 count++;
771 /* environment must be sorted */
772 sorted_env = xmalloc(sizeof(*sorted_env) * (count + 1));
773 memcpy(sorted_env, env, sizeof(*sorted_env) * (count + 1));
774 qsort(sorted_env, count, sizeof(*sorted_env), env_compare);
776 strbuf_init(&envblk, 0);
777 for (e = sorted_env; *e; e++) {
778 strbuf_addstr(&envblk, *e);
779 strbuf_addch(&envblk, '\0');
781 free(sorted_env);
784 memset(&pi, 0, sizeof(pi));
785 ret = CreateProcess(cmd, args.buf, NULL, NULL, TRUE, flags,
786 env ? envblk.buf : NULL, dir, &si, &pi);
788 if (env)
789 strbuf_release(&envblk);
790 strbuf_release(&args);
792 if (!ret) {
793 errno = ENOENT;
794 return -1;
796 CloseHandle(pi.hThread);
797 return (pid_t)pi.hProcess;
800 static pid_t mingw_spawnve(const char *cmd, const char **argv, char **env,
801 int prepend_cmd)
803 return mingw_spawnve_fd(cmd, argv, env, NULL, prepend_cmd, 0, 1, 2);
806 pid_t mingw_spawnvpe(const char *cmd, const char **argv, char **env,
807 const char *dir,
808 int fhin, int fhout, int fherr)
810 pid_t pid;
811 char **path = get_path_split();
812 char *prog = path_lookup(cmd, path, 0);
814 if (!prog) {
815 errno = ENOENT;
816 pid = -1;
818 else {
819 const char *interpr = parse_interpreter(prog);
821 if (interpr) {
822 const char *argv0 = argv[0];
823 char *iprog = path_lookup(interpr, path, 1);
824 argv[0] = prog;
825 if (!iprog) {
826 errno = ENOENT;
827 pid = -1;
829 else {
830 pid = mingw_spawnve_fd(iprog, argv, env, dir, 1,
831 fhin, fhout, fherr);
832 free(iprog);
834 argv[0] = argv0;
836 else
837 pid = mingw_spawnve_fd(prog, argv, env, dir, 0,
838 fhin, fhout, fherr);
839 free(prog);
841 free_path_split(path);
842 return pid;
845 static int try_shell_exec(const char *cmd, char *const *argv, char **env)
847 const char *interpr = parse_interpreter(cmd);
848 char **path;
849 char *prog;
850 int pid = 0;
852 if (!interpr)
853 return 0;
854 path = get_path_split();
855 prog = path_lookup(interpr, path, 1);
856 if (prog) {
857 int argc = 0;
858 const char **argv2;
859 while (argv[argc]) argc++;
860 argv2 = xmalloc(sizeof(*argv) * (argc+1));
861 argv2[0] = (char *)cmd; /* full path to the script file */
862 memcpy(&argv2[1], &argv[1], sizeof(*argv) * argc);
863 pid = mingw_spawnve(prog, argv2, env, 1);
864 if (pid >= 0) {
865 int status;
866 if (waitpid(pid, &status, 0) < 0)
867 status = 255;
868 exit(status);
870 pid = 1; /* indicate that we tried but failed */
871 free(prog);
872 free(argv2);
874 free_path_split(path);
875 return pid;
878 static void mingw_execve(const char *cmd, char *const *argv, char *const *env)
880 /* check if git_command is a shell script */
881 if (!try_shell_exec(cmd, argv, (char **)env)) {
882 int pid, status;
884 pid = mingw_spawnve(cmd, (const char **)argv, (char **)env, 0);
885 if (pid < 0)
886 return;
887 if (waitpid(pid, &status, 0) < 0)
888 status = 255;
889 exit(status);
893 void mingw_execvp(const char *cmd, char *const *argv)
895 char **path = get_path_split();
896 char *prog = path_lookup(cmd, path, 0);
898 if (prog) {
899 mingw_execve(prog, argv, environ);
900 free(prog);
901 } else
902 errno = ENOENT;
904 free_path_split(path);
907 void mingw_execv(const char *cmd, char *const *argv)
909 mingw_execve(cmd, argv, environ);
912 static char **copy_environ(void)
914 char **env;
915 int i = 0;
916 while (environ[i])
917 i++;
918 env = xmalloc((i+1)*sizeof(*env));
919 for (i = 0; environ[i]; i++)
920 env[i] = xstrdup(environ[i]);
921 env[i] = NULL;
922 return env;
925 void free_environ(char **env)
927 int i;
928 for (i = 0; env[i]; i++)
929 free(env[i]);
930 free(env);
933 static int lookup_env(char **env, const char *name, size_t nmln)
935 int i;
937 for (i = 0; env[i]; i++) {
938 if (0 == strncmp(env[i], name, nmln)
939 && '=' == env[i][nmln])
940 /* matches */
941 return i;
943 return -1;
947 * If name contains '=', then sets the variable, otherwise it unsets it
949 static char **env_setenv(char **env, const char *name)
951 char *eq = strchrnul(name, '=');
952 int i = lookup_env(env, name, eq-name);
954 if (i < 0) {
955 if (*eq) {
956 for (i = 0; env[i]; i++)
958 env = xrealloc(env, (i+2)*sizeof(*env));
959 env[i] = xstrdup(name);
960 env[i+1] = NULL;
963 else {
964 free(env[i]);
965 if (*eq)
966 env[i] = xstrdup(name);
967 else
968 for (; env[i]; i++)
969 env[i] = env[i+1];
971 return env;
975 * Copies global environ and adjusts variables as specified by vars.
977 char **make_augmented_environ(const char *const *vars)
979 char **env = copy_environ();
981 while (*vars)
982 env = env_setenv(env, *vars++);
983 return env;
987 * Note, this isn't a complete replacement for getaddrinfo. It assumes
988 * that service contains a numerical port, or that it it is null. It
989 * does a simple search using gethostbyname, and returns one IPv4 host
990 * if one was found.
992 static int WSAAPI getaddrinfo_stub(const char *node, const char *service,
993 const struct addrinfo *hints,
994 struct addrinfo **res)
996 struct hostent *h = gethostbyname(node);
997 struct addrinfo *ai;
998 struct sockaddr_in *sin;
1000 if (!h)
1001 return WSAGetLastError();
1003 ai = xmalloc(sizeof(struct addrinfo));
1004 *res = ai;
1005 ai->ai_flags = 0;
1006 ai->ai_family = AF_INET;
1007 ai->ai_socktype = hints->ai_socktype;
1008 switch (hints->ai_socktype) {
1009 case SOCK_STREAM:
1010 ai->ai_protocol = IPPROTO_TCP;
1011 break;
1012 case SOCK_DGRAM:
1013 ai->ai_protocol = IPPROTO_UDP;
1014 break;
1015 default:
1016 ai->ai_protocol = 0;
1017 break;
1019 ai->ai_addrlen = sizeof(struct sockaddr_in);
1020 ai->ai_canonname = strdup(h->h_name);
1022 sin = xmalloc(ai->ai_addrlen);
1023 memset(sin, 0, ai->ai_addrlen);
1024 sin->sin_family = AF_INET;
1025 if (service)
1026 sin->sin_port = htons(atoi(service));
1027 sin->sin_addr = *(struct in_addr *)h->h_addr;
1028 ai->ai_addr = (struct sockaddr *)sin;
1029 ai->ai_next = 0;
1030 return 0;
1033 static void WSAAPI freeaddrinfo_stub(struct addrinfo *res)
1035 free(res->ai_canonname);
1036 free(res->ai_addr);
1037 free(res);
1040 static int WSAAPI getnameinfo_stub(const struct sockaddr *sa, socklen_t salen,
1041 char *host, DWORD hostlen,
1042 char *serv, DWORD servlen, int flags)
1044 const struct sockaddr_in *sin = (const struct sockaddr_in *)sa;
1045 if (sa->sa_family != AF_INET)
1046 return EAI_FAMILY;
1047 if (!host && !serv)
1048 return EAI_NONAME;
1050 if (host && hostlen > 0) {
1051 struct hostent *ent = NULL;
1052 if (!(flags & NI_NUMERICHOST))
1053 ent = gethostbyaddr((const char *)&sin->sin_addr,
1054 sizeof(sin->sin_addr), AF_INET);
1056 if (ent)
1057 snprintf(host, hostlen, "%s", ent->h_name);
1058 else if (flags & NI_NAMEREQD)
1059 return EAI_NONAME;
1060 else
1061 snprintf(host, hostlen, "%s", inet_ntoa(sin->sin_addr));
1064 if (serv && servlen > 0) {
1065 struct servent *ent = NULL;
1066 if (!(flags & NI_NUMERICSERV))
1067 ent = getservbyport(sin->sin_port,
1068 flags & NI_DGRAM ? "udp" : "tcp");
1070 if (ent)
1071 snprintf(serv, servlen, "%s", ent->s_name);
1072 else
1073 snprintf(serv, servlen, "%d", ntohs(sin->sin_port));
1076 return 0;
1079 static HMODULE ipv6_dll = NULL;
1080 static void (WSAAPI *ipv6_freeaddrinfo)(struct addrinfo *res);
1081 static int (WSAAPI *ipv6_getaddrinfo)(const char *node, const char *service,
1082 const struct addrinfo *hints,
1083 struct addrinfo **res);
1084 static int (WSAAPI *ipv6_getnameinfo)(const struct sockaddr *sa, socklen_t salen,
1085 char *host, DWORD hostlen,
1086 char *serv, DWORD servlen, int flags);
1088 * gai_strerror is an inline function in the ws2tcpip.h header, so we
1089 * don't need to try to load that one dynamically.
1092 static void socket_cleanup(void)
1094 WSACleanup();
1095 if (ipv6_dll)
1096 FreeLibrary(ipv6_dll);
1097 ipv6_dll = NULL;
1098 ipv6_freeaddrinfo = freeaddrinfo_stub;
1099 ipv6_getaddrinfo = getaddrinfo_stub;
1100 ipv6_getnameinfo = getnameinfo_stub;
1103 static void ensure_socket_initialization(void)
1105 WSADATA wsa;
1106 static int initialized = 0;
1107 const char *libraries[] = { "ws2_32.dll", "wship6.dll", NULL };
1108 const char **name;
1110 if (initialized)
1111 return;
1113 if (WSAStartup(MAKEWORD(2,2), &wsa))
1114 die("unable to initialize winsock subsystem, error %d",
1115 WSAGetLastError());
1117 for (name = libraries; *name; name++) {
1118 ipv6_dll = LoadLibrary(*name);
1119 if (!ipv6_dll)
1120 continue;
1122 ipv6_freeaddrinfo = (void (WSAAPI *)(struct addrinfo *))
1123 GetProcAddress(ipv6_dll, "freeaddrinfo");
1124 ipv6_getaddrinfo = (int (WSAAPI *)(const char *, const char *,
1125 const struct addrinfo *,
1126 struct addrinfo **))
1127 GetProcAddress(ipv6_dll, "getaddrinfo");
1128 ipv6_getnameinfo = (int (WSAAPI *)(const struct sockaddr *,
1129 socklen_t, char *, DWORD,
1130 char *, DWORD, int))
1131 GetProcAddress(ipv6_dll, "getnameinfo");
1132 if (!ipv6_freeaddrinfo || !ipv6_getaddrinfo || !ipv6_getnameinfo) {
1133 FreeLibrary(ipv6_dll);
1134 ipv6_dll = NULL;
1135 } else
1136 break;
1138 if (!ipv6_freeaddrinfo || !ipv6_getaddrinfo || !ipv6_getnameinfo) {
1139 ipv6_freeaddrinfo = freeaddrinfo_stub;
1140 ipv6_getaddrinfo = getaddrinfo_stub;
1141 ipv6_getnameinfo = getnameinfo_stub;
1144 atexit(socket_cleanup);
1145 initialized = 1;
1148 #undef gethostbyname
1149 struct hostent *mingw_gethostbyname(const char *host)
1151 ensure_socket_initialization();
1152 return gethostbyname(host);
1155 void mingw_freeaddrinfo(struct addrinfo *res)
1157 ipv6_freeaddrinfo(res);
1160 int mingw_getaddrinfo(const char *node, const char *service,
1161 const struct addrinfo *hints, struct addrinfo **res)
1163 ensure_socket_initialization();
1164 return ipv6_getaddrinfo(node, service, hints, res);
1167 int mingw_getnameinfo(const struct sockaddr *sa, socklen_t salen,
1168 char *host, DWORD hostlen, char *serv, DWORD servlen,
1169 int flags)
1171 ensure_socket_initialization();
1172 return ipv6_getnameinfo(sa, salen, host, hostlen, serv, servlen, flags);
1175 int mingw_socket(int domain, int type, int protocol)
1177 int sockfd;
1178 SOCKET s = WSASocket(domain, type, protocol, NULL, 0, 0);
1179 if (s == INVALID_SOCKET) {
1181 * WSAGetLastError() values are regular BSD error codes
1182 * biased by WSABASEERR.
1183 * However, strerror() does not know about networking
1184 * specific errors, which are values beginning at 38 or so.
1185 * Therefore, we choose to leave the biased error code
1186 * in errno so that _if_ someone looks up the code somewhere,
1187 * then it is at least the number that are usually listed.
1189 errno = WSAGetLastError();
1190 return -1;
1192 /* convert into a file descriptor */
1193 if ((sockfd = _open_osfhandle(s, O_RDWR|O_BINARY)) < 0) {
1194 closesocket(s);
1195 return error("unable to make a socket file descriptor: %s",
1196 strerror(errno));
1198 return sockfd;
1201 #undef connect
1202 int mingw_connect(int sockfd, struct sockaddr *sa, size_t sz)
1204 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
1205 return connect(s, sa, sz);
1208 #undef rename
1209 int mingw_rename(const char *pold, const char *pnew)
1211 DWORD attrs, gle;
1212 int tries = 0;
1213 static const int delay[] = { 0, 1, 10, 20, 40 };
1216 * Try native rename() first to get errno right.
1217 * It is based on MoveFile(), which cannot overwrite existing files.
1219 if (!rename(pold, pnew))
1220 return 0;
1221 if (errno != EEXIST)
1222 return -1;
1223 repeat:
1224 if (MoveFileEx(pold, pnew, MOVEFILE_REPLACE_EXISTING))
1225 return 0;
1226 /* TODO: translate more errors */
1227 gle = GetLastError();
1228 if (gle == ERROR_ACCESS_DENIED &&
1229 (attrs = GetFileAttributes(pnew)) != INVALID_FILE_ATTRIBUTES) {
1230 if (attrs & FILE_ATTRIBUTE_DIRECTORY) {
1231 errno = EISDIR;
1232 return -1;
1234 if ((attrs & FILE_ATTRIBUTE_READONLY) &&
1235 SetFileAttributes(pnew, attrs & ~FILE_ATTRIBUTE_READONLY)) {
1236 if (MoveFileEx(pold, pnew, MOVEFILE_REPLACE_EXISTING))
1237 return 0;
1238 gle = GetLastError();
1239 /* revert file attributes on failure */
1240 SetFileAttributes(pnew, attrs);
1243 if (tries < ARRAY_SIZE(delay) && gle == ERROR_ACCESS_DENIED) {
1245 * We assume that some other process had the source or
1246 * destination file open at the wrong moment and retry.
1247 * In order to give the other process a higher chance to
1248 * complete its operation, we give up our time slice now.
1249 * If we have to retry again, we do sleep a bit.
1251 Sleep(delay[tries]);
1252 tries++;
1253 goto repeat;
1255 errno = EACCES;
1256 return -1;
1260 * Note that this doesn't return the actual pagesize, but
1261 * the allocation granularity. If future Windows specific git code
1262 * needs the real getpagesize function, we need to find another solution.
1264 int mingw_getpagesize(void)
1266 SYSTEM_INFO si;
1267 GetSystemInfo(&si);
1268 return si.dwAllocationGranularity;
1271 struct passwd *getpwuid(int uid)
1273 static char user_name[100];
1274 static struct passwd p;
1276 DWORD len = sizeof(user_name);
1277 if (!GetUserName(user_name, &len))
1278 return NULL;
1279 p.pw_name = user_name;
1280 p.pw_gecos = "unknown";
1281 p.pw_dir = NULL;
1282 return &p;
1285 static HANDLE timer_event;
1286 static HANDLE timer_thread;
1287 static int timer_interval;
1288 static int one_shot;
1289 static sig_handler_t timer_fn = SIG_DFL;
1291 /* The timer works like this:
1292 * The thread, ticktack(), is a trivial routine that most of the time
1293 * only waits to receive the signal to terminate. The main thread tells
1294 * the thread to terminate by setting the timer_event to the signalled
1295 * state.
1296 * But ticktack() interrupts the wait state after the timer's interval
1297 * length to call the signal handler.
1300 static unsigned __stdcall ticktack(void *dummy)
1302 while (WaitForSingleObject(timer_event, timer_interval) == WAIT_TIMEOUT) {
1303 if (timer_fn == SIG_DFL)
1304 die("Alarm");
1305 if (timer_fn != SIG_IGN)
1306 timer_fn(SIGALRM);
1307 if (one_shot)
1308 break;
1310 return 0;
1313 static int start_timer_thread(void)
1315 timer_event = CreateEvent(NULL, FALSE, FALSE, NULL);
1316 if (timer_event) {
1317 timer_thread = (HANDLE) _beginthreadex(NULL, 0, ticktack, NULL, 0, NULL);
1318 if (!timer_thread )
1319 return errno = ENOMEM,
1320 error("cannot start timer thread");
1321 } else
1322 return errno = ENOMEM,
1323 error("cannot allocate resources for timer");
1324 return 0;
1327 static void stop_timer_thread(void)
1329 if (timer_event)
1330 SetEvent(timer_event); /* tell thread to terminate */
1331 if (timer_thread) {
1332 int rc = WaitForSingleObject(timer_thread, 1000);
1333 if (rc == WAIT_TIMEOUT)
1334 error("timer thread did not terminate timely");
1335 else if (rc != WAIT_OBJECT_0)
1336 error("waiting for timer thread failed: %lu",
1337 GetLastError());
1338 CloseHandle(timer_thread);
1340 if (timer_event)
1341 CloseHandle(timer_event);
1342 timer_event = NULL;
1343 timer_thread = NULL;
1346 static inline int is_timeval_eq(const struct timeval *i1, const struct timeval *i2)
1348 return i1->tv_sec == i2->tv_sec && i1->tv_usec == i2->tv_usec;
1351 int setitimer(int type, struct itimerval *in, struct itimerval *out)
1353 static const struct timeval zero;
1354 static int atexit_done;
1356 if (out != NULL)
1357 return errno = EINVAL,
1358 error("setitimer param 3 != NULL not implemented");
1359 if (!is_timeval_eq(&in->it_interval, &zero) &&
1360 !is_timeval_eq(&in->it_interval, &in->it_value))
1361 return errno = EINVAL,
1362 error("setitimer: it_interval must be zero or eq it_value");
1364 if (timer_thread)
1365 stop_timer_thread();
1367 if (is_timeval_eq(&in->it_value, &zero) &&
1368 is_timeval_eq(&in->it_interval, &zero))
1369 return 0;
1371 timer_interval = in->it_value.tv_sec * 1000 + in->it_value.tv_usec / 1000;
1372 one_shot = is_timeval_eq(&in->it_interval, &zero);
1373 if (!atexit_done) {
1374 atexit(stop_timer_thread);
1375 atexit_done = 1;
1377 return start_timer_thread();
1380 int sigaction(int sig, struct sigaction *in, struct sigaction *out)
1382 if (sig != SIGALRM)
1383 return errno = EINVAL,
1384 error("sigaction only implemented for SIGALRM");
1385 if (out != NULL)
1386 return errno = EINVAL,
1387 error("sigaction: param 3 != NULL not implemented");
1389 timer_fn = in->sa_handler;
1390 return 0;
1393 #undef signal
1394 sig_handler_t mingw_signal(int sig, sig_handler_t handler)
1396 sig_handler_t old = timer_fn;
1397 if (sig != SIGALRM)
1398 return signal(sig, handler);
1399 timer_fn = handler;
1400 return old;
1403 static const char *make_backslash_path(const char *path)
1405 static char buf[PATH_MAX + 1];
1406 char *c;
1408 if (strlcpy(buf, path, PATH_MAX) >= PATH_MAX)
1409 die("Too long path: %.*s", 60, path);
1411 for (c = buf; *c; c++) {
1412 if (*c == '/')
1413 *c = '\\';
1415 return buf;
1418 void mingw_open_html(const char *unixpath)
1420 const char *htmlpath = make_backslash_path(unixpath);
1421 typedef HINSTANCE (WINAPI *T)(HWND, const char *,
1422 const char *, const char *, const char *, INT);
1423 T ShellExecute;
1424 HMODULE shell32;
1425 int r;
1427 shell32 = LoadLibrary("shell32.dll");
1428 if (!shell32)
1429 die("cannot load shell32.dll");
1430 ShellExecute = (T)GetProcAddress(shell32, "ShellExecuteA");
1431 if (!ShellExecute)
1432 die("cannot run browser");
1434 printf("Launching default browser to display HTML ...\n");
1435 r = (int)ShellExecute(NULL, "open", htmlpath, NULL, "\\", SW_SHOWNORMAL);
1436 FreeLibrary(shell32);
1437 /* see the MSDN documentation referring to the result codes here */
1438 if (r <= 32) {
1439 die("failed to launch browser for %.*s", MAX_PATH, unixpath);
1443 int link(const char *oldpath, const char *newpath)
1445 typedef BOOL (WINAPI *T)(const char*, const char*, LPSECURITY_ATTRIBUTES);
1446 static T create_hard_link = NULL;
1447 if (!create_hard_link) {
1448 create_hard_link = (T) GetProcAddress(
1449 GetModuleHandle("kernel32.dll"), "CreateHardLinkA");
1450 if (!create_hard_link)
1451 create_hard_link = (T)-1;
1453 if (create_hard_link == (T)-1) {
1454 errno = ENOSYS;
1455 return -1;
1457 if (!create_hard_link(newpath, oldpath, NULL)) {
1458 errno = err_win_to_posix(GetLastError());
1459 return -1;
1461 return 0;
1464 char *getpass(const char *prompt)
1466 struct strbuf buf = STRBUF_INIT;
1468 fputs(prompt, stderr);
1469 for (;;) {
1470 char c = _getch();
1471 if (c == '\r' || c == '\n')
1472 break;
1473 strbuf_addch(&buf, c);
1475 fputs("\n", stderr);
1476 return strbuf_detach(&buf, NULL);
1479 #ifndef NO_MINGW_REPLACE_READDIR
1480 /* MinGW readdir implementation to avoid extra lstats for Git */
1481 struct mingw_DIR
1483 struct _finddata_t dd_dta; /* disk transfer area for this dir */
1484 struct mingw_dirent dd_dir; /* Our own implementation, including d_type */
1485 long dd_handle; /* _findnext handle */
1486 int dd_stat; /* 0 = next entry to read is first entry, -1 = off the end, positive = 0 based index of next entry */
1487 char dd_name[1]; /* given path for dir with search pattern (struct is extended) */
1490 struct dirent *mingw_readdir(DIR *dir)
1492 WIN32_FIND_DATAA buf;
1493 HANDLE handle;
1494 struct mingw_DIR *mdir = (struct mingw_DIR*)dir;
1496 if (!dir->dd_handle) {
1497 errno = EBADF; /* No set_errno for mingw */
1498 return NULL;
1501 if (dir->dd_handle == (long)INVALID_HANDLE_VALUE && dir->dd_stat == 0)
1503 DWORD lasterr;
1504 handle = FindFirstFileA(dir->dd_name, &buf);
1505 lasterr = GetLastError();
1506 dir->dd_handle = (long)handle;
1507 if (handle == INVALID_HANDLE_VALUE && (lasterr != ERROR_NO_MORE_FILES)) {
1508 errno = err_win_to_posix(lasterr);
1509 return NULL;
1511 } else if (dir->dd_handle == (long)INVALID_HANDLE_VALUE) {
1512 return NULL;
1513 } else if (!FindNextFileA((HANDLE)dir->dd_handle, &buf)) {
1514 DWORD lasterr = GetLastError();
1515 FindClose((HANDLE)dir->dd_handle);
1516 dir->dd_handle = (long)INVALID_HANDLE_VALUE;
1517 /* POSIX says you shouldn't set errno when readdir can't
1518 find any more files; so, if another error we leave it set. */
1519 if (lasterr != ERROR_NO_MORE_FILES)
1520 errno = err_win_to_posix(lasterr);
1521 return NULL;
1524 /* We get here if `buf' contains valid data. */
1525 strcpy(dir->dd_dir.d_name, buf.cFileName);
1526 ++dir->dd_stat;
1528 /* Set file type, based on WIN32_FIND_DATA */
1529 mdir->dd_dir.d_type = 0;
1530 if (buf.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)
1531 mdir->dd_dir.d_type |= DT_DIR;
1532 else
1533 mdir->dd_dir.d_type |= DT_REG;
1535 return (struct dirent*)&dir->dd_dir;
1537 #endif // !NO_MINGW_REPLACE_READDIR