Merge branch 'cb/maint-orphan-merge-noclobber'
[git/kirr.git] / compat / mingw.c
blobfdbf093f6eb704ec0ca0e5abf6baf1f94350676b
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 int err;
202 WIN32_FILE_ATTRIBUTE_DATA fdata;
204 if (!(err = get_file_attr(file_name, &fdata))) {
205 buf->st_ino = 0;
206 buf->st_gid = 0;
207 buf->st_uid = 0;
208 buf->st_nlink = 1;
209 buf->st_mode = file_attr_to_st_mode(fdata.dwFileAttributes);
210 buf->st_size = fdata.nFileSizeLow |
211 (((off_t)fdata.nFileSizeHigh)<<32);
212 buf->st_dev = buf->st_rdev = 0; /* not used by Git */
213 buf->st_atime = filetime_to_time_t(&(fdata.ftLastAccessTime));
214 buf->st_mtime = filetime_to_time_t(&(fdata.ftLastWriteTime));
215 buf->st_ctime = filetime_to_time_t(&(fdata.ftCreationTime));
216 if (fdata.dwFileAttributes & FILE_ATTRIBUTE_REPARSE_POINT) {
217 WIN32_FIND_DATAA findbuf;
218 HANDLE handle = FindFirstFileA(file_name, &findbuf);
219 if (handle != INVALID_HANDLE_VALUE) {
220 if ((findbuf.dwFileAttributes & FILE_ATTRIBUTE_REPARSE_POINT) &&
221 (findbuf.dwReserved0 == IO_REPARSE_TAG_SYMLINK)) {
222 if (follow) {
223 char buffer[MAXIMUM_REPARSE_DATA_BUFFER_SIZE];
224 buf->st_size = readlink(file_name, buffer, MAXIMUM_REPARSE_DATA_BUFFER_SIZE);
225 } else {
226 buf->st_mode = S_IFLNK;
228 buf->st_mode |= S_IREAD;
229 if (!(findbuf.dwFileAttributes & FILE_ATTRIBUTE_READONLY))
230 buf->st_mode |= S_IWRITE;
232 FindClose(handle);
235 return 0;
237 errno = err;
238 return -1;
241 /* We provide our own lstat/fstat functions, since the provided
242 * lstat/fstat functions are so slow. These stat functions are
243 * tailored for Git's usage (read: fast), and are not meant to be
244 * complete. Note that Git stat()s are redirected to mingw_lstat()
245 * too, since Windows doesn't really handle symlinks that well.
247 static int do_stat_internal(int follow, const char *file_name, struct stat *buf)
249 int namelen;
250 static char alt_name[PATH_MAX];
252 if (!do_lstat(follow, file_name, buf))
253 return 0;
255 /* if file_name ended in a '/', Windows returned ENOENT;
256 * try again without trailing slashes
258 if (errno != ENOENT)
259 return -1;
261 namelen = strlen(file_name);
262 if (namelen && file_name[namelen-1] != '/')
263 return -1;
264 while (namelen && file_name[namelen-1] == '/')
265 --namelen;
266 if (!namelen || namelen >= PATH_MAX)
267 return -1;
269 memcpy(alt_name, file_name, namelen);
270 alt_name[namelen] = 0;
271 return do_lstat(follow, alt_name, buf);
274 int mingw_lstat(const char *file_name, struct stat *buf)
276 return do_stat_internal(0, file_name, buf);
278 int mingw_stat(const char *file_name, struct stat *buf)
280 return do_stat_internal(1, file_name, buf);
283 #undef fstat
284 int mingw_fstat(int fd, struct stat *buf)
286 HANDLE fh = (HANDLE)_get_osfhandle(fd);
287 BY_HANDLE_FILE_INFORMATION fdata;
289 if (fh == INVALID_HANDLE_VALUE) {
290 errno = EBADF;
291 return -1;
293 /* direct non-file handles to MS's fstat() */
294 if (GetFileType(fh) != FILE_TYPE_DISK)
295 return _fstati64(fd, buf);
297 if (GetFileInformationByHandle(fh, &fdata)) {
298 buf->st_ino = 0;
299 buf->st_gid = 0;
300 buf->st_uid = 0;
301 buf->st_nlink = 1;
302 buf->st_mode = file_attr_to_st_mode(fdata.dwFileAttributes);
303 buf->st_size = fdata.nFileSizeLow |
304 (((off_t)fdata.nFileSizeHigh)<<32);
305 buf->st_dev = buf->st_rdev = 0; /* not used by Git */
306 buf->st_atime = filetime_to_time_t(&(fdata.ftLastAccessTime));
307 buf->st_mtime = filetime_to_time_t(&(fdata.ftLastWriteTime));
308 buf->st_ctime = filetime_to_time_t(&(fdata.ftCreationTime));
309 return 0;
311 errno = EBADF;
312 return -1;
315 static inline void time_t_to_filetime(time_t t, FILETIME *ft)
317 long long winTime = t * 10000000LL + 116444736000000000LL;
318 ft->dwLowDateTime = winTime;
319 ft->dwHighDateTime = winTime >> 32;
322 int mingw_utime (const char *file_name, const struct utimbuf *times)
324 FILETIME mft, aft;
325 int fh, rc;
327 /* must have write permission */
328 DWORD attrs = GetFileAttributes(file_name);
329 if (attrs != INVALID_FILE_ATTRIBUTES &&
330 (attrs & FILE_ATTRIBUTE_READONLY)) {
331 /* ignore errors here; open() will report them */
332 SetFileAttributes(file_name, attrs & ~FILE_ATTRIBUTE_READONLY);
335 if ((fh = open(file_name, O_RDWR | O_BINARY)) < 0) {
336 rc = -1;
337 goto revert_attrs;
340 if (times) {
341 time_t_to_filetime(times->modtime, &mft);
342 time_t_to_filetime(times->actime, &aft);
343 } else {
344 GetSystemTimeAsFileTime(&mft);
345 aft = mft;
347 if (!SetFileTime((HANDLE)_get_osfhandle(fh), NULL, &aft, &mft)) {
348 errno = EINVAL;
349 rc = -1;
350 } else
351 rc = 0;
352 close(fh);
354 revert_attrs:
355 if (attrs != INVALID_FILE_ATTRIBUTES &&
356 (attrs & FILE_ATTRIBUTE_READONLY)) {
357 /* ignore errors again */
358 SetFileAttributes(file_name, attrs);
360 return rc;
363 unsigned int sleep (unsigned int seconds)
365 Sleep(seconds*1000);
366 return 0;
369 int mkstemp(char *template)
371 char *filename = mktemp(template);
372 if (filename == NULL)
373 return -1;
374 return open(filename, O_RDWR | O_CREAT, 0600);
377 int gettimeofday(struct timeval *tv, void *tz)
379 FILETIME ft;
380 long long hnsec;
382 GetSystemTimeAsFileTime(&ft);
383 hnsec = filetime_to_hnsec(&ft);
384 tv->tv_sec = hnsec / 10000000;
385 tv->tv_usec = (hnsec % 10000000) / 10;
386 return 0;
389 int pipe(int filedes[2])
391 HANDLE h[2];
393 /* this creates non-inheritable handles */
394 if (!CreatePipe(&h[0], &h[1], NULL, 8192)) {
395 errno = err_win_to_posix(GetLastError());
396 return -1;
398 filedes[0] = _open_osfhandle((int)h[0], O_NOINHERIT);
399 if (filedes[0] < 0) {
400 CloseHandle(h[0]);
401 CloseHandle(h[1]);
402 return -1;
404 filedes[1] = _open_osfhandle((int)h[1], O_NOINHERIT);
405 if (filedes[0] < 0) {
406 close(filedes[0]);
407 CloseHandle(h[1]);
408 return -1;
410 return 0;
413 struct tm *gmtime_r(const time_t *timep, struct tm *result)
415 /* gmtime() in MSVCRT.DLL is thread-safe, but not reentrant */
416 memcpy(result, gmtime(timep), sizeof(struct tm));
417 return result;
420 struct tm *localtime_r(const time_t *timep, struct tm *result)
422 /* localtime() in MSVCRT.DLL is thread-safe, but not reentrant */
423 memcpy(result, localtime(timep), sizeof(struct tm));
424 return result;
427 #undef getcwd
428 char *mingw_getcwd(char *pointer, int len)
430 int i;
431 char *ret = getcwd(pointer, len);
432 if (!ret)
433 return ret;
434 for (i = 0; pointer[i]; i++)
435 if (pointer[i] == '\\')
436 pointer[i] = '/';
437 return ret;
440 #undef getenv
441 char *mingw_getenv(const char *name)
443 char *result = getenv(name);
444 if (!result && !strcmp(name, "TMPDIR")) {
445 /* on Windows it is TMP and TEMP */
446 result = getenv("TMP");
447 if (!result)
448 result = getenv("TEMP");
450 return result;
454 * See http://msdn2.microsoft.com/en-us/library/17w5ykft(vs.71).aspx
455 * (Parsing C++ Command-Line Arguments)
457 static const char *quote_arg(const char *arg)
459 /* count chars to quote */
460 int len = 0, n = 0;
461 int force_quotes = 0;
462 char *q, *d;
463 const char *p = arg;
464 if (!*p) force_quotes = 1;
465 while (*p) {
466 if (isspace(*p) || *p == '*' || *p == '?' || *p == '{' || *p == '\'')
467 force_quotes = 1;
468 else if (*p == '"')
469 n++;
470 else if (*p == '\\') {
471 int count = 0;
472 while (*p == '\\') {
473 count++;
474 p++;
475 len++;
477 if (*p == '"')
478 n += count*2 + 1;
479 continue;
481 len++;
482 p++;
484 if (!force_quotes && n == 0)
485 return arg;
487 /* insert \ where necessary */
488 d = q = xmalloc(len+n+3);
489 *d++ = '"';
490 while (*arg) {
491 if (*arg == '"')
492 *d++ = '\\';
493 else if (*arg == '\\') {
494 int count = 0;
495 while (*arg == '\\') {
496 count++;
497 *d++ = *arg++;
499 if (*arg == '"') {
500 while (count-- > 0)
501 *d++ = '\\';
502 *d++ = '\\';
505 *d++ = *arg++;
507 *d++ = '"';
508 *d++ = 0;
509 return q;
512 static const char *parse_interpreter(const char *cmd)
514 static char buf[100];
515 char *p, *opt;
516 int n, fd;
518 /* don't even try a .exe */
519 n = strlen(cmd);
520 if (n >= 4 && !strcasecmp(cmd+n-4, ".exe"))
521 return NULL;
523 fd = open(cmd, O_RDONLY);
524 if (fd < 0)
525 return NULL;
526 n = read(fd, buf, sizeof(buf)-1);
527 close(fd);
528 if (n < 4) /* at least '#!/x' and not error */
529 return NULL;
531 if (buf[0] != '#' || buf[1] != '!')
532 return NULL;
533 buf[n] = '\0';
534 p = buf + strcspn(buf, "\r\n");
535 if (!*p)
536 return NULL;
538 *p = '\0';
539 if (!(p = strrchr(buf+2, '/')) && !(p = strrchr(buf+2, '\\')))
540 return NULL;
541 /* strip options */
542 if ((opt = strchr(p+1, ' ')))
543 *opt = '\0';
544 return p+1;
548 * Splits the PATH into parts.
550 static char **get_path_split(void)
552 char *p, **path, *envpath = getenv("PATH");
553 int i, n = 0;
555 if (!envpath || !*envpath)
556 return NULL;
558 envpath = xstrdup(envpath);
559 p = envpath;
560 while (p) {
561 char *dir = p;
562 p = strchr(p, ';');
563 if (p) *p++ = '\0';
564 if (*dir) { /* not earlier, catches series of ; */
565 ++n;
568 if (!n)
569 return NULL;
571 path = xmalloc((n+1)*sizeof(char *));
572 p = envpath;
573 i = 0;
574 do {
575 if (*p)
576 path[i++] = xstrdup(p);
577 p = p+strlen(p)+1;
578 } while (i < n);
579 path[i] = NULL;
581 free(envpath);
583 return path;
586 static void free_path_split(char **path)
588 char **p = path;
590 if (!path)
591 return;
593 while (*p)
594 free(*p++);
595 free(path);
599 * exe_only means that we only want to detect .exe files, but not scripts
600 * (which do not have an extension)
602 static char *lookup_prog(const char *dir, const char *cmd, int isexe, int exe_only)
604 char path[MAX_PATH];
605 snprintf(path, sizeof(path), "%s/%s.exe", dir, cmd);
607 if (!isexe && access(path, F_OK) == 0)
608 return xstrdup(path);
609 path[strlen(path)-4] = '\0';
610 if ((!exe_only || isexe) && access(path, F_OK) == 0)
611 if (!(GetFileAttributes(path) & FILE_ATTRIBUTE_DIRECTORY))
612 return xstrdup(path);
613 return NULL;
617 * Determines the absolute path of cmd using the split path in path.
618 * If cmd contains a slash or backslash, no lookup is performed.
620 static char *path_lookup(const char *cmd, char **path, int exe_only)
622 char *prog = NULL;
623 int len = strlen(cmd);
624 int isexe = len >= 4 && !strcasecmp(cmd+len-4, ".exe");
626 if (strchr(cmd, '/') || strchr(cmd, '\\'))
627 prog = xstrdup(cmd);
629 while (!prog && *path)
630 prog = lookup_prog(*path++, cmd, isexe, exe_only);
632 return prog;
635 static int env_compare(const void *a, const void *b)
637 char *const *ea = a;
638 char *const *eb = b;
639 return strcasecmp(*ea, *eb);
642 struct pinfo_t {
643 struct pinfo_t *next;
644 pid_t pid;
645 HANDLE proc;
646 } pinfo_t;
647 struct pinfo_t *pinfo = NULL;
648 CRITICAL_SECTION pinfo_cs;
650 static pid_t mingw_spawnve_fd(const char *cmd, const char **argv, char **env,
651 const char *dir,
652 int prepend_cmd, int fhin, int fhout, int fherr)
654 STARTUPINFO si;
655 PROCESS_INFORMATION pi;
656 struct strbuf envblk, args;
657 unsigned flags;
658 BOOL ret;
660 /* Determine whether or not we are associated to a console */
661 HANDLE cons = CreateFile("CONOUT$", GENERIC_WRITE,
662 FILE_SHARE_WRITE, NULL, OPEN_EXISTING,
663 FILE_ATTRIBUTE_NORMAL, NULL);
664 if (cons == INVALID_HANDLE_VALUE) {
665 /* There is no console associated with this process.
666 * Since the child is a console process, Windows
667 * would normally create a console window. But
668 * since we'll be redirecting std streams, we do
669 * not need the console.
670 * It is necessary to use DETACHED_PROCESS
671 * instead of CREATE_NO_WINDOW to make ssh
672 * recognize that it has no console.
674 flags = DETACHED_PROCESS;
675 } else {
676 /* There is already a console. If we specified
677 * DETACHED_PROCESS here, too, Windows would
678 * disassociate the child from the console.
679 * The same is true for CREATE_NO_WINDOW.
680 * Go figure!
682 flags = 0;
683 CloseHandle(cons);
685 memset(&si, 0, sizeof(si));
686 si.cb = sizeof(si);
687 si.dwFlags = STARTF_USESTDHANDLES;
688 si.hStdInput = (HANDLE) _get_osfhandle(fhin);
689 si.hStdOutput = (HANDLE) _get_osfhandle(fhout);
690 si.hStdError = (HANDLE) _get_osfhandle(fherr);
692 /* concatenate argv, quoting args as we go */
693 strbuf_init(&args, 0);
694 if (prepend_cmd) {
695 char *quoted = (char *)quote_arg(cmd);
696 strbuf_addstr(&args, quoted);
697 if (quoted != cmd)
698 free(quoted);
700 for (; *argv; argv++) {
701 char *quoted = (char *)quote_arg(*argv);
702 if (*args.buf)
703 strbuf_addch(&args, ' ');
704 strbuf_addstr(&args, quoted);
705 if (quoted != *argv)
706 free(quoted);
709 if (env) {
710 int count = 0;
711 char **e, **sorted_env;
713 for (e = env; *e; e++)
714 count++;
716 /* environment must be sorted */
717 sorted_env = xmalloc(sizeof(*sorted_env) * (count + 1));
718 memcpy(sorted_env, env, sizeof(*sorted_env) * (count + 1));
719 qsort(sorted_env, count, sizeof(*sorted_env), env_compare);
721 strbuf_init(&envblk, 0);
722 for (e = sorted_env; *e; e++) {
723 strbuf_addstr(&envblk, *e);
724 strbuf_addch(&envblk, '\0');
726 free(sorted_env);
729 memset(&pi, 0, sizeof(pi));
730 ret = CreateProcess(cmd, args.buf, NULL, NULL, TRUE, flags,
731 env ? envblk.buf : NULL, dir, &si, &pi);
733 if (env)
734 strbuf_release(&envblk);
735 strbuf_release(&args);
737 if (!ret) {
738 errno = ENOENT;
739 return -1;
741 CloseHandle(pi.hThread);
744 * The process ID is the human-readable identifier of the process
745 * that we want to present in log and error messages. The handle
746 * is not useful for this purpose. But we cannot close it, either,
747 * because it is not possible to turn a process ID into a process
748 * handle after the process terminated.
749 * Keep the handle in a list for waitpid.
751 EnterCriticalSection(&pinfo_cs);
753 struct pinfo_t *info = xmalloc(sizeof(struct pinfo_t));
754 info->pid = pi.dwProcessId;
755 info->proc = pi.hProcess;
756 info->next = pinfo;
757 pinfo = info;
759 LeaveCriticalSection(&pinfo_cs);
761 return (pid_t)pi.dwProcessId;
764 static pid_t mingw_spawnve(const char *cmd, const char **argv, char **env,
765 int prepend_cmd)
767 return mingw_spawnve_fd(cmd, argv, env, NULL, prepend_cmd, 0, 1, 2);
770 pid_t mingw_spawnvpe(const char *cmd, const char **argv, char **env,
771 const char *dir,
772 int fhin, int fhout, int fherr)
774 pid_t pid;
775 char **path = get_path_split();
776 char *prog = path_lookup(cmd, path, 0);
778 if (!prog) {
779 errno = ENOENT;
780 pid = -1;
782 else {
783 const char *interpr = parse_interpreter(prog);
785 if (interpr) {
786 const char *argv0 = argv[0];
787 char *iprog = path_lookup(interpr, path, 1);
788 argv[0] = prog;
789 if (!iprog) {
790 errno = ENOENT;
791 pid = -1;
793 else {
794 pid = mingw_spawnve_fd(iprog, argv, env, dir, 1,
795 fhin, fhout, fherr);
796 free(iprog);
798 argv[0] = argv0;
800 else
801 pid = mingw_spawnve_fd(prog, argv, env, dir, 0,
802 fhin, fhout, fherr);
803 free(prog);
805 free_path_split(path);
806 return pid;
809 static int try_shell_exec(const char *cmd, char *const *argv, char **env)
811 const char *interpr = parse_interpreter(cmd);
812 char **path;
813 char *prog;
814 int pid = 0;
816 if (!interpr)
817 return 0;
818 path = get_path_split();
819 prog = path_lookup(interpr, path, 1);
820 if (prog) {
821 int argc = 0;
822 const char **argv2;
823 while (argv[argc]) argc++;
824 argv2 = xmalloc(sizeof(*argv) * (argc+1));
825 argv2[0] = (char *)cmd; /* full path to the script file */
826 memcpy(&argv2[1], &argv[1], sizeof(*argv) * argc);
827 pid = mingw_spawnve(prog, argv2, env, 1);
828 if (pid >= 0) {
829 int status;
830 if (waitpid(pid, &status, 0) < 0)
831 status = 255;
832 exit(status);
834 pid = 1; /* indicate that we tried but failed */
835 free(prog);
836 free(argv2);
838 free_path_split(path);
839 return pid;
842 static void mingw_execve(const char *cmd, char *const *argv, char *const *env)
844 /* check if git_command is a shell script */
845 if (!try_shell_exec(cmd, argv, (char **)env)) {
846 int pid, status;
848 pid = mingw_spawnve(cmd, (const char **)argv, (char **)env, 0);
849 if (pid < 0)
850 return;
851 if (waitpid(pid, &status, 0) < 0)
852 status = 255;
853 exit(status);
857 void mingw_execvp(const char *cmd, char *const *argv)
859 char **path = get_path_split();
860 char *prog = path_lookup(cmd, path, 0);
862 if (prog) {
863 mingw_execve(prog, argv, environ);
864 free(prog);
865 } else
866 errno = ENOENT;
868 free_path_split(path);
871 void mingw_execv(const char *cmd, char *const *argv)
873 mingw_execve(cmd, argv, environ);
876 int mingw_kill(pid_t pid, int sig)
878 if (pid > 0 && sig == SIGTERM) {
879 HANDLE h = OpenProcess(PROCESS_TERMINATE, FALSE, pid);
881 if (TerminateProcess(h, -1)) {
882 CloseHandle(h);
883 return 0;
886 errno = err_win_to_posix(GetLastError());
887 CloseHandle(h);
888 return -1;
891 errno = EINVAL;
892 return -1;
895 static char **copy_environ(void)
897 char **env;
898 int i = 0;
899 while (environ[i])
900 i++;
901 env = xmalloc((i+1)*sizeof(*env));
902 for (i = 0; environ[i]; i++)
903 env[i] = xstrdup(environ[i]);
904 env[i] = NULL;
905 return env;
908 void free_environ(char **env)
910 int i;
911 for (i = 0; env[i]; i++)
912 free(env[i]);
913 free(env);
916 static int lookup_env(char **env, const char *name, size_t nmln)
918 int i;
920 for (i = 0; env[i]; i++) {
921 if (0 == strncmp(env[i], name, nmln)
922 && '=' == env[i][nmln])
923 /* matches */
924 return i;
926 return -1;
930 * If name contains '=', then sets the variable, otherwise it unsets it
932 static char **env_setenv(char **env, const char *name)
934 char *eq = strchrnul(name, '=');
935 int i = lookup_env(env, name, eq-name);
937 if (i < 0) {
938 if (*eq) {
939 for (i = 0; env[i]; i++)
941 env = xrealloc(env, (i+2)*sizeof(*env));
942 env[i] = xstrdup(name);
943 env[i+1] = NULL;
946 else {
947 free(env[i]);
948 if (*eq)
949 env[i] = xstrdup(name);
950 else
951 for (; env[i]; i++)
952 env[i] = env[i+1];
954 return env;
958 * Copies global environ and adjusts variables as specified by vars.
960 char **make_augmented_environ(const char *const *vars)
962 char **env = copy_environ();
964 while (*vars)
965 env = env_setenv(env, *vars++);
966 return env;
970 * Note, this isn't a complete replacement for getaddrinfo. It assumes
971 * that service contains a numerical port, or that it it is null. It
972 * does a simple search using gethostbyname, and returns one IPv4 host
973 * if one was found.
975 static int WSAAPI getaddrinfo_stub(const char *node, const char *service,
976 const struct addrinfo *hints,
977 struct addrinfo **res)
979 struct hostent *h = NULL;
980 struct addrinfo *ai;
981 struct sockaddr_in *sin;
983 if (node) {
984 h = gethostbyname(node);
985 if (!h)
986 return WSAGetLastError();
989 ai = xmalloc(sizeof(struct addrinfo));
990 *res = ai;
991 ai->ai_flags = 0;
992 ai->ai_family = AF_INET;
993 ai->ai_socktype = hints ? hints->ai_socktype : 0;
994 switch (ai->ai_socktype) {
995 case SOCK_STREAM:
996 ai->ai_protocol = IPPROTO_TCP;
997 break;
998 case SOCK_DGRAM:
999 ai->ai_protocol = IPPROTO_UDP;
1000 break;
1001 default:
1002 ai->ai_protocol = 0;
1003 break;
1005 ai->ai_addrlen = sizeof(struct sockaddr_in);
1006 if (hints && (hints->ai_flags & AI_CANONNAME))
1007 ai->ai_canonname = h ? strdup(h->h_name) : NULL;
1008 else
1009 ai->ai_canonname = NULL;
1011 sin = xmalloc(ai->ai_addrlen);
1012 memset(sin, 0, ai->ai_addrlen);
1013 sin->sin_family = AF_INET;
1014 /* Note: getaddrinfo is supposed to allow service to be a string,
1015 * which should be looked up using getservbyname. This is
1016 * currently not implemented */
1017 if (service)
1018 sin->sin_port = htons(atoi(service));
1019 if (h)
1020 sin->sin_addr = *(struct in_addr *)h->h_addr;
1021 else if (hints && (hints->ai_flags & AI_PASSIVE))
1022 sin->sin_addr.s_addr = INADDR_ANY;
1023 else
1024 sin->sin_addr.s_addr = INADDR_LOOPBACK;
1025 ai->ai_addr = (struct sockaddr *)sin;
1026 ai->ai_next = 0;
1027 return 0;
1030 static void WSAAPI freeaddrinfo_stub(struct addrinfo *res)
1032 free(res->ai_canonname);
1033 free(res->ai_addr);
1034 free(res);
1037 static int WSAAPI getnameinfo_stub(const struct sockaddr *sa, socklen_t salen,
1038 char *host, DWORD hostlen,
1039 char *serv, DWORD servlen, int flags)
1041 const struct sockaddr_in *sin = (const struct sockaddr_in *)sa;
1042 if (sa->sa_family != AF_INET)
1043 return EAI_FAMILY;
1044 if (!host && !serv)
1045 return EAI_NONAME;
1047 if (host && hostlen > 0) {
1048 struct hostent *ent = NULL;
1049 if (!(flags & NI_NUMERICHOST))
1050 ent = gethostbyaddr((const char *)&sin->sin_addr,
1051 sizeof(sin->sin_addr), AF_INET);
1053 if (ent)
1054 snprintf(host, hostlen, "%s", ent->h_name);
1055 else if (flags & NI_NAMEREQD)
1056 return EAI_NONAME;
1057 else
1058 snprintf(host, hostlen, "%s", inet_ntoa(sin->sin_addr));
1061 if (serv && servlen > 0) {
1062 struct servent *ent = NULL;
1063 if (!(flags & NI_NUMERICSERV))
1064 ent = getservbyport(sin->sin_port,
1065 flags & NI_DGRAM ? "udp" : "tcp");
1067 if (ent)
1068 snprintf(serv, servlen, "%s", ent->s_name);
1069 else
1070 snprintf(serv, servlen, "%d", ntohs(sin->sin_port));
1073 return 0;
1076 static HMODULE ipv6_dll = NULL;
1077 static void (WSAAPI *ipv6_freeaddrinfo)(struct addrinfo *res);
1078 static int (WSAAPI *ipv6_getaddrinfo)(const char *node, const char *service,
1079 const struct addrinfo *hints,
1080 struct addrinfo **res);
1081 static int (WSAAPI *ipv6_getnameinfo)(const struct sockaddr *sa, socklen_t salen,
1082 char *host, DWORD hostlen,
1083 char *serv, DWORD servlen, int flags);
1085 * gai_strerror is an inline function in the ws2tcpip.h header, so we
1086 * don't need to try to load that one dynamically.
1089 static void socket_cleanup(void)
1091 WSACleanup();
1092 if (ipv6_dll)
1093 FreeLibrary(ipv6_dll);
1094 ipv6_dll = NULL;
1095 ipv6_freeaddrinfo = freeaddrinfo_stub;
1096 ipv6_getaddrinfo = getaddrinfo_stub;
1097 ipv6_getnameinfo = getnameinfo_stub;
1100 static void ensure_socket_initialization(void)
1102 WSADATA wsa;
1103 static int initialized = 0;
1104 const char *libraries[] = { "ws2_32.dll", "wship6.dll", NULL };
1105 const char **name;
1107 if (initialized)
1108 return;
1110 if (WSAStartup(MAKEWORD(2,2), &wsa))
1111 die("unable to initialize winsock subsystem, error %d",
1112 WSAGetLastError());
1114 for (name = libraries; *name; name++) {
1115 ipv6_dll = LoadLibrary(*name);
1116 if (!ipv6_dll)
1117 continue;
1119 ipv6_freeaddrinfo = (void (WSAAPI *)(struct addrinfo *))
1120 GetProcAddress(ipv6_dll, "freeaddrinfo");
1121 ipv6_getaddrinfo = (int (WSAAPI *)(const char *, const char *,
1122 const struct addrinfo *,
1123 struct addrinfo **))
1124 GetProcAddress(ipv6_dll, "getaddrinfo");
1125 ipv6_getnameinfo = (int (WSAAPI *)(const struct sockaddr *,
1126 socklen_t, char *, DWORD,
1127 char *, DWORD, int))
1128 GetProcAddress(ipv6_dll, "getnameinfo");
1129 if (!ipv6_freeaddrinfo || !ipv6_getaddrinfo || !ipv6_getnameinfo) {
1130 FreeLibrary(ipv6_dll);
1131 ipv6_dll = NULL;
1132 } else
1133 break;
1135 if (!ipv6_freeaddrinfo || !ipv6_getaddrinfo || !ipv6_getnameinfo) {
1136 ipv6_freeaddrinfo = freeaddrinfo_stub;
1137 ipv6_getaddrinfo = getaddrinfo_stub;
1138 ipv6_getnameinfo = getnameinfo_stub;
1141 atexit(socket_cleanup);
1142 initialized = 1;
1145 #undef gethostbyname
1146 struct hostent *mingw_gethostbyname(const char *host)
1148 ensure_socket_initialization();
1149 return gethostbyname(host);
1152 void mingw_freeaddrinfo(struct addrinfo *res)
1154 ipv6_freeaddrinfo(res);
1157 int mingw_getaddrinfo(const char *node, const char *service,
1158 const struct addrinfo *hints, struct addrinfo **res)
1160 ensure_socket_initialization();
1161 return ipv6_getaddrinfo(node, service, hints, res);
1164 int mingw_getnameinfo(const struct sockaddr *sa, socklen_t salen,
1165 char *host, DWORD hostlen, char *serv, DWORD servlen,
1166 int flags)
1168 ensure_socket_initialization();
1169 return ipv6_getnameinfo(sa, salen, host, hostlen, serv, servlen, flags);
1172 int mingw_socket(int domain, int type, int protocol)
1174 int sockfd;
1175 SOCKET s;
1177 ensure_socket_initialization();
1178 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 bind
1209 int mingw_bind(int sockfd, struct sockaddr *sa, size_t sz)
1211 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
1212 return bind(s, sa, sz);
1215 #undef setsockopt
1216 int mingw_setsockopt(int sockfd, int lvl, int optname, void *optval, int optlen)
1218 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
1219 return setsockopt(s, lvl, optname, (const char*)optval, optlen);
1222 #undef listen
1223 int mingw_listen(int sockfd, int backlog)
1225 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
1226 return listen(s, backlog);
1229 #undef accept
1230 int mingw_accept(int sockfd1, struct sockaddr *sa, socklen_t *sz)
1232 int sockfd2;
1234 SOCKET s1 = (SOCKET)_get_osfhandle(sockfd1);
1235 SOCKET s2 = accept(s1, sa, sz);
1237 /* convert into a file descriptor */
1238 if ((sockfd2 = _open_osfhandle(s2, O_RDWR|O_BINARY)) < 0) {
1239 int err = errno;
1240 closesocket(s2);
1241 return error("unable to make a socket file descriptor: %s",
1242 strerror(err));
1244 return sockfd2;
1247 #undef rename
1248 int mingw_rename(const char *pold, const char *pnew)
1250 DWORD attrs, gle;
1251 int tries = 0;
1252 static const int delay[] = { 0, 1, 10, 20, 40 };
1255 * Try native rename() first to get errno right.
1256 * It is based on MoveFile(), which cannot overwrite existing files.
1258 if (!rename(pold, pnew))
1259 return 0;
1260 if (errno != EEXIST)
1261 return -1;
1262 repeat:
1263 if (MoveFileEx(pold, pnew, MOVEFILE_REPLACE_EXISTING))
1264 return 0;
1265 /* TODO: translate more errors */
1266 gle = GetLastError();
1267 if (gle == ERROR_ACCESS_DENIED &&
1268 (attrs = GetFileAttributes(pnew)) != INVALID_FILE_ATTRIBUTES) {
1269 if (attrs & FILE_ATTRIBUTE_DIRECTORY) {
1270 errno = EISDIR;
1271 return -1;
1273 if ((attrs & FILE_ATTRIBUTE_READONLY) &&
1274 SetFileAttributes(pnew, attrs & ~FILE_ATTRIBUTE_READONLY)) {
1275 if (MoveFileEx(pold, pnew, MOVEFILE_REPLACE_EXISTING))
1276 return 0;
1277 gle = GetLastError();
1278 /* revert file attributes on failure */
1279 SetFileAttributes(pnew, attrs);
1282 if (tries < ARRAY_SIZE(delay) && gle == ERROR_ACCESS_DENIED) {
1284 * We assume that some other process had the source or
1285 * destination file open at the wrong moment and retry.
1286 * In order to give the other process a higher chance to
1287 * complete its operation, we give up our time slice now.
1288 * If we have to retry again, we do sleep a bit.
1290 Sleep(delay[tries]);
1291 tries++;
1292 goto repeat;
1294 errno = EACCES;
1295 return -1;
1299 * Note that this doesn't return the actual pagesize, but
1300 * the allocation granularity. If future Windows specific git code
1301 * needs the real getpagesize function, we need to find another solution.
1303 int mingw_getpagesize(void)
1305 SYSTEM_INFO si;
1306 GetSystemInfo(&si);
1307 return si.dwAllocationGranularity;
1310 struct passwd *getpwuid(int uid)
1312 static char user_name[100];
1313 static struct passwd p;
1315 DWORD len = sizeof(user_name);
1316 if (!GetUserName(user_name, &len))
1317 return NULL;
1318 p.pw_name = user_name;
1319 p.pw_gecos = "unknown";
1320 p.pw_dir = NULL;
1321 return &p;
1324 static HANDLE timer_event;
1325 static HANDLE timer_thread;
1326 static int timer_interval;
1327 static int one_shot;
1328 static sig_handler_t timer_fn = SIG_DFL;
1330 /* The timer works like this:
1331 * The thread, ticktack(), is a trivial routine that most of the time
1332 * only waits to receive the signal to terminate. The main thread tells
1333 * the thread to terminate by setting the timer_event to the signalled
1334 * state.
1335 * But ticktack() interrupts the wait state after the timer's interval
1336 * length to call the signal handler.
1339 static unsigned __stdcall ticktack(void *dummy)
1341 while (WaitForSingleObject(timer_event, timer_interval) == WAIT_TIMEOUT) {
1342 if (timer_fn == SIG_DFL)
1343 die("Alarm");
1344 if (timer_fn != SIG_IGN)
1345 timer_fn(SIGALRM);
1346 if (one_shot)
1347 break;
1349 return 0;
1352 static int start_timer_thread(void)
1354 timer_event = CreateEvent(NULL, FALSE, FALSE, NULL);
1355 if (timer_event) {
1356 timer_thread = (HANDLE) _beginthreadex(NULL, 0, ticktack, NULL, 0, NULL);
1357 if (!timer_thread )
1358 return errno = ENOMEM,
1359 error("cannot start timer thread");
1360 } else
1361 return errno = ENOMEM,
1362 error("cannot allocate resources for timer");
1363 return 0;
1366 static void stop_timer_thread(void)
1368 if (timer_event)
1369 SetEvent(timer_event); /* tell thread to terminate */
1370 if (timer_thread) {
1371 int rc = WaitForSingleObject(timer_thread, 1000);
1372 if (rc == WAIT_TIMEOUT)
1373 error("timer thread did not terminate timely");
1374 else if (rc != WAIT_OBJECT_0)
1375 error("waiting for timer thread failed: %lu",
1376 GetLastError());
1377 CloseHandle(timer_thread);
1379 if (timer_event)
1380 CloseHandle(timer_event);
1381 timer_event = NULL;
1382 timer_thread = NULL;
1385 static inline int is_timeval_eq(const struct timeval *i1, const struct timeval *i2)
1387 return i1->tv_sec == i2->tv_sec && i1->tv_usec == i2->tv_usec;
1390 int setitimer(int type, struct itimerval *in, struct itimerval *out)
1392 static const struct timeval zero;
1393 static int atexit_done;
1395 if (out != NULL)
1396 return errno = EINVAL,
1397 error("setitimer param 3 != NULL not implemented");
1398 if (!is_timeval_eq(&in->it_interval, &zero) &&
1399 !is_timeval_eq(&in->it_interval, &in->it_value))
1400 return errno = EINVAL,
1401 error("setitimer: it_interval must be zero or eq it_value");
1403 if (timer_thread)
1404 stop_timer_thread();
1406 if (is_timeval_eq(&in->it_value, &zero) &&
1407 is_timeval_eq(&in->it_interval, &zero))
1408 return 0;
1410 timer_interval = in->it_value.tv_sec * 1000 + in->it_value.tv_usec / 1000;
1411 one_shot = is_timeval_eq(&in->it_interval, &zero);
1412 if (!atexit_done) {
1413 atexit(stop_timer_thread);
1414 atexit_done = 1;
1416 return start_timer_thread();
1419 int sigaction(int sig, struct sigaction *in, struct sigaction *out)
1421 if (sig != SIGALRM)
1422 return errno = EINVAL,
1423 error("sigaction only implemented for SIGALRM");
1424 if (out != NULL)
1425 return errno = EINVAL,
1426 error("sigaction: param 3 != NULL not implemented");
1428 timer_fn = in->sa_handler;
1429 return 0;
1432 #undef signal
1433 sig_handler_t mingw_signal(int sig, sig_handler_t handler)
1435 sig_handler_t old = timer_fn;
1436 if (sig != SIGALRM)
1437 return signal(sig, handler);
1438 timer_fn = handler;
1439 return old;
1442 static const char *make_backslash_path(const char *path)
1444 static char buf[PATH_MAX + 1];
1445 char *c;
1447 if (strlcpy(buf, path, PATH_MAX) >= PATH_MAX)
1448 die("Too long path: %.*s", 60, path);
1450 for (c = buf; *c; c++) {
1451 if (*c == '/')
1452 *c = '\\';
1454 return buf;
1457 void mingw_open_html(const char *unixpath)
1459 const char *htmlpath = make_backslash_path(unixpath);
1460 typedef HINSTANCE (WINAPI *T)(HWND, const char *,
1461 const char *, const char *, const char *, INT);
1462 T ShellExecute;
1463 HMODULE shell32;
1464 int r;
1466 shell32 = LoadLibrary("shell32.dll");
1467 if (!shell32)
1468 die("cannot load shell32.dll");
1469 ShellExecute = (T)GetProcAddress(shell32, "ShellExecuteA");
1470 if (!ShellExecute)
1471 die("cannot run browser");
1473 printf("Launching default browser to display HTML ...\n");
1474 r = (int)ShellExecute(NULL, "open", htmlpath, NULL, "\\", SW_SHOWNORMAL);
1475 FreeLibrary(shell32);
1476 /* see the MSDN documentation referring to the result codes here */
1477 if (r <= 32) {
1478 die("failed to launch browser for %.*s", MAX_PATH, unixpath);
1482 int link(const char *oldpath, const char *newpath)
1484 typedef BOOL (WINAPI *T)(const char*, const char*, LPSECURITY_ATTRIBUTES);
1485 static T create_hard_link = NULL;
1486 if (!create_hard_link) {
1487 create_hard_link = (T) GetProcAddress(
1488 GetModuleHandle("kernel32.dll"), "CreateHardLinkA");
1489 if (!create_hard_link)
1490 create_hard_link = (T)-1;
1492 if (create_hard_link == (T)-1) {
1493 errno = ENOSYS;
1494 return -1;
1496 if (!create_hard_link(newpath, oldpath, NULL)) {
1497 errno = err_win_to_posix(GetLastError());
1498 return -1;
1500 return 0;
1503 char *getpass(const char *prompt)
1505 struct strbuf buf = STRBUF_INIT;
1507 fputs(prompt, stderr);
1508 for (;;) {
1509 char c = _getch();
1510 if (c == '\r' || c == '\n')
1511 break;
1512 strbuf_addch(&buf, c);
1514 fputs("\n", stderr);
1515 return strbuf_detach(&buf, NULL);
1518 pid_t waitpid(pid_t pid, int *status, unsigned options)
1520 HANDLE h = OpenProcess(SYNCHRONIZE | PROCESS_QUERY_INFORMATION,
1521 FALSE, pid);
1522 if (!h) {
1523 errno = ECHILD;
1524 return -1;
1527 if (pid > 0 && options & WNOHANG) {
1528 if (WAIT_OBJECT_0 != WaitForSingleObject(h, 0)) {
1529 CloseHandle(h);
1530 return 0;
1532 options &= ~WNOHANG;
1535 if (options == 0) {
1536 struct pinfo_t **ppinfo;
1537 if (WaitForSingleObject(h, INFINITE) != WAIT_OBJECT_0) {
1538 CloseHandle(h);
1539 return 0;
1542 if (status)
1543 GetExitCodeProcess(h, (LPDWORD)status);
1545 EnterCriticalSection(&pinfo_cs);
1547 ppinfo = &pinfo;
1548 while (*ppinfo) {
1549 struct pinfo_t *info = *ppinfo;
1550 if (info->pid == pid) {
1551 CloseHandle(info->proc);
1552 *ppinfo = info->next;
1553 free(info);
1554 break;
1556 ppinfo = &info->next;
1559 LeaveCriticalSection(&pinfo_cs);
1561 CloseHandle(h);
1562 return pid;
1564 CloseHandle(h);
1566 errno = EINVAL;
1567 return -1;
1570 #ifndef NO_MINGW_REPLACE_READDIR
1571 /* MinGW readdir implementation to avoid extra lstats for Git */
1572 struct mingw_DIR
1574 struct _finddata_t dd_dta; /* disk transfer area for this dir */
1575 struct mingw_dirent dd_dir; /* Our own implementation, including d_type */
1576 long dd_handle; /* _findnext handle */
1577 int dd_stat; /* 0 = next entry to read is first entry, -1 = off the end, positive = 0 based index of next entry */
1578 char dd_name[1]; /* given path for dir with search pattern (struct is extended) */
1581 struct dirent *mingw_readdir(DIR *dir)
1583 WIN32_FIND_DATAA buf;
1584 HANDLE handle;
1585 struct mingw_DIR *mdir = (struct mingw_DIR*)dir;
1587 if (!dir->dd_handle) {
1588 errno = EBADF; /* No set_errno for mingw */
1589 return NULL;
1592 if (dir->dd_handle == (long)INVALID_HANDLE_VALUE && dir->dd_stat == 0)
1594 DWORD lasterr;
1595 handle = FindFirstFileA(dir->dd_name, &buf);
1596 lasterr = GetLastError();
1597 dir->dd_handle = (long)handle;
1598 if (handle == INVALID_HANDLE_VALUE && (lasterr != ERROR_NO_MORE_FILES)) {
1599 errno = err_win_to_posix(lasterr);
1600 return NULL;
1602 } else if (dir->dd_handle == (long)INVALID_HANDLE_VALUE) {
1603 return NULL;
1604 } else if (!FindNextFileA((HANDLE)dir->dd_handle, &buf)) {
1605 DWORD lasterr = GetLastError();
1606 FindClose((HANDLE)dir->dd_handle);
1607 dir->dd_handle = (long)INVALID_HANDLE_VALUE;
1608 /* POSIX says you shouldn't set errno when readdir can't
1609 find any more files; so, if another error we leave it set. */
1610 if (lasterr != ERROR_NO_MORE_FILES)
1611 errno = err_win_to_posix(lasterr);
1612 return NULL;
1615 /* We get here if `buf' contains valid data. */
1616 strcpy(dir->dd_dir.d_name, buf.cFileName);
1617 ++dir->dd_stat;
1619 /* Set file type, based on WIN32_FIND_DATA */
1620 mdir->dd_dir.d_type = 0;
1621 if (buf.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)
1622 mdir->dd_dir.d_type |= DT_DIR;
1623 else
1624 mdir->dd_dir.d_type |= DT_REG;
1626 return (struct dirent*)&dir->dd_dir;
1628 #endif // !NO_MINGW_REPLACE_READDIR