builtin-mailinfo.c: check error status from rewind and ftruncate
[git/spearce.git] / compat / mingw.c
blob6b5b5b2c7011a89c0415ebb89406c4a3ac53e9a9
1 #include "../git-compat-util.h"
2 #include "win32.h"
3 #include <conio.h>
4 #include "../strbuf.h"
6 #include <shellapi.h>
8 static int err_win_to_posix(DWORD winerr)
10 int error = ENOSYS;
11 switch(winerr) {
12 case ERROR_ACCESS_DENIED: error = EACCES; break;
13 case ERROR_ACCOUNT_DISABLED: error = EACCES; break;
14 case ERROR_ACCOUNT_RESTRICTION: error = EACCES; break;
15 case ERROR_ALREADY_ASSIGNED: error = EBUSY; break;
16 case ERROR_ALREADY_EXISTS: error = EEXIST; break;
17 case ERROR_ARITHMETIC_OVERFLOW: error = ERANGE; break;
18 case ERROR_BAD_COMMAND: error = EIO; break;
19 case ERROR_BAD_DEVICE: error = ENODEV; break;
20 case ERROR_BAD_DRIVER_LEVEL: error = ENXIO; break;
21 case ERROR_BAD_EXE_FORMAT: error = ENOEXEC; break;
22 case ERROR_BAD_FORMAT: error = ENOEXEC; break;
23 case ERROR_BAD_LENGTH: error = EINVAL; break;
24 case ERROR_BAD_PATHNAME: error = ENOENT; break;
25 case ERROR_BAD_PIPE: error = EPIPE; break;
26 case ERROR_BAD_UNIT: error = ENODEV; break;
27 case ERROR_BAD_USERNAME: error = EINVAL; break;
28 case ERROR_BROKEN_PIPE: error = EPIPE; break;
29 case ERROR_BUFFER_OVERFLOW: error = ENAMETOOLONG; break;
30 case ERROR_BUSY: error = EBUSY; break;
31 case ERROR_BUSY_DRIVE: error = EBUSY; break;
32 case ERROR_CALL_NOT_IMPLEMENTED: error = ENOSYS; break;
33 case ERROR_CANNOT_MAKE: error = EACCES; break;
34 case ERROR_CANTOPEN: error = EIO; break;
35 case ERROR_CANTREAD: error = EIO; break;
36 case ERROR_CANTWRITE: error = EIO; break;
37 case ERROR_CRC: error = EIO; break;
38 case ERROR_CURRENT_DIRECTORY: error = EACCES; break;
39 case ERROR_DEVICE_IN_USE: error = EBUSY; break;
40 case ERROR_DEV_NOT_EXIST: error = ENODEV; break;
41 case ERROR_DIRECTORY: error = EINVAL; break;
42 case ERROR_DIR_NOT_EMPTY: error = ENOTEMPTY; break;
43 case ERROR_DISK_CHANGE: error = EIO; break;
44 case ERROR_DISK_FULL: error = ENOSPC; break;
45 case ERROR_DRIVE_LOCKED: error = EBUSY; break;
46 case ERROR_ENVVAR_NOT_FOUND: error = EINVAL; break;
47 case ERROR_EXE_MARKED_INVALID: error = ENOEXEC; break;
48 case ERROR_FILENAME_EXCED_RANGE: error = ENAMETOOLONG; break;
49 case ERROR_FILE_EXISTS: error = EEXIST; break;
50 case ERROR_FILE_INVALID: error = ENODEV; break;
51 case ERROR_FILE_NOT_FOUND: error = ENOENT; break;
52 case ERROR_GEN_FAILURE: error = EIO; break;
53 case ERROR_HANDLE_DISK_FULL: error = ENOSPC; break;
54 case ERROR_INSUFFICIENT_BUFFER: error = ENOMEM; break;
55 case ERROR_INVALID_ACCESS: error = EACCES; break;
56 case ERROR_INVALID_ADDRESS: error = EFAULT; break;
57 case ERROR_INVALID_BLOCK: error = EFAULT; break;
58 case ERROR_INVALID_DATA: error = EINVAL; break;
59 case ERROR_INVALID_DRIVE: error = ENODEV; break;
60 case ERROR_INVALID_EXE_SIGNATURE: error = ENOEXEC; break;
61 case ERROR_INVALID_FLAGS: error = EINVAL; break;
62 case ERROR_INVALID_FUNCTION: error = ENOSYS; break;
63 case ERROR_INVALID_HANDLE: error = EBADF; break;
64 case ERROR_INVALID_LOGON_HOURS: error = EACCES; break;
65 case ERROR_INVALID_NAME: error = EINVAL; break;
66 case ERROR_INVALID_OWNER: error = EINVAL; break;
67 case ERROR_INVALID_PARAMETER: error = EINVAL; break;
68 case ERROR_INVALID_PASSWORD: error = EPERM; break;
69 case ERROR_INVALID_PRIMARY_GROUP: error = EINVAL; break;
70 case ERROR_INVALID_SIGNAL_NUMBER: error = EINVAL; break;
71 case ERROR_INVALID_TARGET_HANDLE: error = EIO; break;
72 case ERROR_INVALID_WORKSTATION: error = EACCES; break;
73 case ERROR_IO_DEVICE: error = EIO; break;
74 case ERROR_IO_INCOMPLETE: error = EINTR; break;
75 case ERROR_LOCKED: error = EBUSY; break;
76 case ERROR_LOCK_VIOLATION: error = EACCES; break;
77 case ERROR_LOGON_FAILURE: error = EACCES; break;
78 case ERROR_MAPPED_ALIGNMENT: error = EINVAL; break;
79 case ERROR_META_EXPANSION_TOO_LONG: error = E2BIG; break;
80 case ERROR_MORE_DATA: error = EPIPE; break;
81 case ERROR_NEGATIVE_SEEK: error = ESPIPE; break;
82 case ERROR_NOACCESS: error = EFAULT; break;
83 case ERROR_NONE_MAPPED: error = EINVAL; break;
84 case ERROR_NOT_ENOUGH_MEMORY: error = ENOMEM; break;
85 case ERROR_NOT_READY: error = EAGAIN; break;
86 case ERROR_NOT_SAME_DEVICE: error = EXDEV; break;
87 case ERROR_NO_DATA: error = EPIPE; break;
88 case ERROR_NO_MORE_SEARCH_HANDLES: error = EIO; break;
89 case ERROR_NO_PROC_SLOTS: error = EAGAIN; break;
90 case ERROR_NO_SUCH_PRIVILEGE: error = EACCES; break;
91 case ERROR_OPEN_FAILED: error = EIO; break;
92 case ERROR_OPEN_FILES: error = EBUSY; break;
93 case ERROR_OPERATION_ABORTED: error = EINTR; break;
94 case ERROR_OUTOFMEMORY: error = ENOMEM; break;
95 case ERROR_PASSWORD_EXPIRED: error = EACCES; break;
96 case ERROR_PATH_BUSY: error = EBUSY; break;
97 case ERROR_PATH_NOT_FOUND: error = ENOENT; break;
98 case ERROR_PIPE_BUSY: error = EBUSY; break;
99 case ERROR_PIPE_CONNECTED: error = EPIPE; break;
100 case ERROR_PIPE_LISTENING: error = EPIPE; break;
101 case ERROR_PIPE_NOT_CONNECTED: error = EPIPE; break;
102 case ERROR_PRIVILEGE_NOT_HELD: error = EACCES; break;
103 case ERROR_READ_FAULT: error = EIO; break;
104 case ERROR_SEEK: error = EIO; break;
105 case ERROR_SEEK_ON_DEVICE: error = ESPIPE; break;
106 case ERROR_SHARING_BUFFER_EXCEEDED: error = ENFILE; break;
107 case ERROR_SHARING_VIOLATION: error = EACCES; break;
108 case ERROR_STACK_OVERFLOW: error = ENOMEM; break;
109 case ERROR_SWAPERROR: error = ENOENT; break;
110 case ERROR_TOO_MANY_MODULES: error = EMFILE; break;
111 case ERROR_TOO_MANY_OPEN_FILES: error = EMFILE; break;
112 case ERROR_UNRECOGNIZED_MEDIA: error = ENXIO; break;
113 case ERROR_UNRECOGNIZED_VOLUME: error = ENODEV; break;
114 case ERROR_WAIT_NO_CHILDREN: error = ECHILD; break;
115 case ERROR_WRITE_FAULT: error = EIO; break;
116 case ERROR_WRITE_PROTECT: error = EROFS; break;
118 return error;
121 #undef open
122 int mingw_open (const char *filename, int oflags, ...)
124 va_list args;
125 unsigned mode;
126 int fd;
128 va_start(args, oflags);
129 mode = va_arg(args, int);
130 va_end(args);
132 if (!strcmp(filename, "/dev/null"))
133 filename = "nul";
135 fd = open(filename, oflags, mode);
137 if (fd < 0 && (oflags & O_CREAT) && errno == EACCES) {
138 DWORD attrs = GetFileAttributes(filename);
139 if (attrs != INVALID_FILE_ATTRIBUTES && (attrs & FILE_ATTRIBUTE_DIRECTORY))
140 errno = EISDIR;
142 return fd;
145 static inline time_t filetime_to_time_t(const FILETIME *ft)
147 long long winTime = ((long long)ft->dwHighDateTime << 32) + ft->dwLowDateTime;
148 winTime -= 116444736000000000LL; /* Windows to Unix Epoch conversion */
149 winTime /= 10000000; /* Nano to seconds resolution */
150 return (time_t)winTime;
153 /* We keep the do_lstat code in a separate function to avoid recursion.
154 * When a path ends with a slash, the stat will fail with ENOENT. In
155 * this case, we strip the trailing slashes and stat again.
157 static int do_lstat(const char *file_name, struct stat *buf)
159 WIN32_FILE_ATTRIBUTE_DATA fdata;
161 if (!(errno = get_file_attr(file_name, &fdata))) {
162 buf->st_ino = 0;
163 buf->st_gid = 0;
164 buf->st_uid = 0;
165 buf->st_nlink = 1;
166 buf->st_mode = file_attr_to_st_mode(fdata.dwFileAttributes);
167 buf->st_size = fdata.nFileSizeLow |
168 (((off_t)fdata.nFileSizeHigh)<<32);
169 buf->st_dev = buf->st_rdev = 0; /* not used by Git */
170 buf->st_atime = filetime_to_time_t(&(fdata.ftLastAccessTime));
171 buf->st_mtime = filetime_to_time_t(&(fdata.ftLastWriteTime));
172 buf->st_ctime = filetime_to_time_t(&(fdata.ftCreationTime));
173 return 0;
175 return -1;
178 /* We provide our own lstat/fstat functions, since the provided
179 * lstat/fstat functions are so slow. These stat functions are
180 * tailored for Git's usage (read: fast), and are not meant to be
181 * complete. Note that Git stat()s are redirected to mingw_lstat()
182 * too, since Windows doesn't really handle symlinks that well.
184 int mingw_lstat(const char *file_name, struct stat *buf)
186 int namelen;
187 static char alt_name[PATH_MAX];
189 if (!do_lstat(file_name, buf))
190 return 0;
192 /* if file_name ended in a '/', Windows returned ENOENT;
193 * try again without trailing slashes
195 if (errno != ENOENT)
196 return -1;
198 namelen = strlen(file_name);
199 if (namelen && file_name[namelen-1] != '/')
200 return -1;
201 while (namelen && file_name[namelen-1] == '/')
202 --namelen;
203 if (!namelen || namelen >= PATH_MAX)
204 return -1;
206 memcpy(alt_name, file_name, namelen);
207 alt_name[namelen] = 0;
208 return do_lstat(alt_name, buf);
211 #undef fstat
212 int mingw_fstat(int fd, struct stat *buf)
214 HANDLE fh = (HANDLE)_get_osfhandle(fd);
215 BY_HANDLE_FILE_INFORMATION fdata;
217 if (fh == INVALID_HANDLE_VALUE) {
218 errno = EBADF;
219 return -1;
221 /* direct non-file handles to MS's fstat() */
222 if (GetFileType(fh) != FILE_TYPE_DISK)
223 return _fstati64(fd, buf);
225 if (GetFileInformationByHandle(fh, &fdata)) {
226 buf->st_ino = 0;
227 buf->st_gid = 0;
228 buf->st_uid = 0;
229 buf->st_nlink = 1;
230 buf->st_mode = file_attr_to_st_mode(fdata.dwFileAttributes);
231 buf->st_size = fdata.nFileSizeLow |
232 (((off_t)fdata.nFileSizeHigh)<<32);
233 buf->st_dev = buf->st_rdev = 0; /* not used by Git */
234 buf->st_atime = filetime_to_time_t(&(fdata.ftLastAccessTime));
235 buf->st_mtime = filetime_to_time_t(&(fdata.ftLastWriteTime));
236 buf->st_ctime = filetime_to_time_t(&(fdata.ftCreationTime));
237 return 0;
239 errno = EBADF;
240 return -1;
243 static inline void time_t_to_filetime(time_t t, FILETIME *ft)
245 long long winTime = t * 10000000LL + 116444736000000000LL;
246 ft->dwLowDateTime = winTime;
247 ft->dwHighDateTime = winTime >> 32;
250 int mingw_utime (const char *file_name, const struct utimbuf *times)
252 FILETIME mft, aft;
253 int fh, rc;
255 /* must have write permission */
256 if ((fh = open(file_name, O_RDWR | O_BINARY)) < 0)
257 return -1;
259 time_t_to_filetime(times->modtime, &mft);
260 time_t_to_filetime(times->actime, &aft);
261 if (!SetFileTime((HANDLE)_get_osfhandle(fh), NULL, &aft, &mft)) {
262 errno = EINVAL;
263 rc = -1;
264 } else
265 rc = 0;
266 close(fh);
267 return rc;
270 unsigned int sleep (unsigned int seconds)
272 Sleep(seconds*1000);
273 return 0;
276 int mkstemp(char *template)
278 char *filename = mktemp(template);
279 if (filename == NULL)
280 return -1;
281 return open(filename, O_RDWR | O_CREAT, 0600);
284 int gettimeofday(struct timeval *tv, void *tz)
286 SYSTEMTIME st;
287 struct tm tm;
288 GetSystemTime(&st);
289 tm.tm_year = st.wYear-1900;
290 tm.tm_mon = st.wMonth-1;
291 tm.tm_mday = st.wDay;
292 tm.tm_hour = st.wHour;
293 tm.tm_min = st.wMinute;
294 tm.tm_sec = st.wSecond;
295 tv->tv_sec = tm_to_time_t(&tm);
296 if (tv->tv_sec < 0)
297 return -1;
298 tv->tv_usec = st.wMilliseconds*1000;
299 return 0;
302 int pipe(int filedes[2])
304 int fd;
305 HANDLE h[2], parent;
307 if (_pipe(filedes, 8192, 0) < 0)
308 return -1;
310 parent = GetCurrentProcess();
312 if (!DuplicateHandle (parent, (HANDLE)_get_osfhandle(filedes[0]),
313 parent, &h[0], 0, FALSE, DUPLICATE_SAME_ACCESS)) {
314 close(filedes[0]);
315 close(filedes[1]);
316 return -1;
318 if (!DuplicateHandle (parent, (HANDLE)_get_osfhandle(filedes[1]),
319 parent, &h[1], 0, FALSE, DUPLICATE_SAME_ACCESS)) {
320 close(filedes[0]);
321 close(filedes[1]);
322 CloseHandle(h[0]);
323 return -1;
325 fd = _open_osfhandle((int)h[0], O_NOINHERIT);
326 if (fd < 0) {
327 close(filedes[0]);
328 close(filedes[1]);
329 CloseHandle(h[0]);
330 CloseHandle(h[1]);
331 return -1;
333 close(filedes[0]);
334 filedes[0] = fd;
335 fd = _open_osfhandle((int)h[1], O_NOINHERIT);
336 if (fd < 0) {
337 close(filedes[0]);
338 close(filedes[1]);
339 CloseHandle(h[1]);
340 return -1;
342 close(filedes[1]);
343 filedes[1] = fd;
344 return 0;
347 int poll(struct pollfd *ufds, unsigned int nfds, int timeout)
349 int i, pending;
351 if (timeout >= 0) {
352 if (nfds == 0) {
353 Sleep(timeout);
354 return 0;
356 return errno = EINVAL, error("poll timeout not supported");
359 /* When there is only one fd to wait for, then we pretend that
360 * input is available and let the actual wait happen when the
361 * caller invokes read().
363 if (nfds == 1) {
364 if (!(ufds[0].events & POLLIN))
365 return errno = EINVAL, error("POLLIN not set");
366 ufds[0].revents = POLLIN;
367 return 0;
370 repeat:
371 pending = 0;
372 for (i = 0; i < nfds; i++) {
373 DWORD avail = 0;
374 HANDLE h = (HANDLE) _get_osfhandle(ufds[i].fd);
375 if (h == INVALID_HANDLE_VALUE)
376 return -1; /* errno was set */
378 if (!(ufds[i].events & POLLIN))
379 return errno = EINVAL, error("POLLIN not set");
381 /* this emulation works only for pipes */
382 if (!PeekNamedPipe(h, NULL, 0, NULL, &avail, NULL)) {
383 int err = GetLastError();
384 if (err == ERROR_BROKEN_PIPE) {
385 ufds[i].revents = POLLHUP;
386 pending++;
387 } else {
388 errno = EINVAL;
389 return error("PeekNamedPipe failed,"
390 " GetLastError: %u", err);
392 } else if (avail) {
393 ufds[i].revents = POLLIN;
394 pending++;
395 } else
396 ufds[i].revents = 0;
398 if (!pending) {
399 /* The only times that we spin here is when the process
400 * that is connected through the pipes is waiting for
401 * its own input data to become available. But since
402 * the process (pack-objects) is itself CPU intensive,
403 * it will happily pick up the time slice that we are
404 * relinquishing here.
406 Sleep(0);
407 goto repeat;
409 return 0;
412 struct tm *gmtime_r(const time_t *timep, struct tm *result)
414 /* gmtime() in MSVCRT.DLL is thread-safe, but not reentrant */
415 memcpy(result, gmtime(timep), sizeof(struct tm));
416 return result;
419 struct tm *localtime_r(const time_t *timep, struct tm *result)
421 /* localtime() in MSVCRT.DLL is thread-safe, but not reentrant */
422 memcpy(result, localtime(timep), sizeof(struct tm));
423 return result;
426 #undef getcwd
427 char *mingw_getcwd(char *pointer, int len)
429 int i;
430 char *ret = getcwd(pointer, len);
431 if (!ret)
432 return ret;
433 for (i = 0; pointer[i]; i++)
434 if (pointer[i] == '\\')
435 pointer[i] = '/';
436 return ret;
439 #undef getenv
440 char *mingw_getenv(const char *name)
442 char *result = getenv(name);
443 if (!result && !strcmp(name, "TMPDIR")) {
444 /* on Windows it is TMP and TEMP */
445 result = getenv("TMP");
446 if (!result)
447 result = getenv("TEMP");
449 return result;
453 * See http://msdn2.microsoft.com/en-us/library/17w5ykft(vs.71).aspx
454 * (Parsing C++ Command-Line Arguments)
456 static const char *quote_arg(const char *arg)
458 /* count chars to quote */
459 int len = 0, n = 0;
460 int force_quotes = 0;
461 char *q, *d;
462 const char *p = arg;
463 if (!*p) force_quotes = 1;
464 while (*p) {
465 if (isspace(*p) || *p == '*' || *p == '?' || *p == '{' || *p == '\'')
466 force_quotes = 1;
467 else if (*p == '"')
468 n++;
469 else if (*p == '\\') {
470 int count = 0;
471 while (*p == '\\') {
472 count++;
473 p++;
474 len++;
476 if (*p == '"')
477 n += count*2 + 1;
478 continue;
480 len++;
481 p++;
483 if (!force_quotes && n == 0)
484 return arg;
486 /* insert \ where necessary */
487 d = q = xmalloc(len+n+3);
488 *d++ = '"';
489 while (*arg) {
490 if (*arg == '"')
491 *d++ = '\\';
492 else if (*arg == '\\') {
493 int count = 0;
494 while (*arg == '\\') {
495 count++;
496 *d++ = *arg++;
498 if (*arg == '"') {
499 while (count-- > 0)
500 *d++ = '\\';
501 *d++ = '\\';
504 *d++ = *arg++;
506 *d++ = '"';
507 *d++ = 0;
508 return q;
511 static const char *parse_interpreter(const char *cmd)
513 static char buf[100];
514 char *p, *opt;
515 int n, fd;
517 /* don't even try a .exe */
518 n = strlen(cmd);
519 if (n >= 4 && !strcasecmp(cmd+n-4, ".exe"))
520 return NULL;
522 fd = open(cmd, O_RDONLY);
523 if (fd < 0)
524 return NULL;
525 n = read(fd, buf, sizeof(buf)-1);
526 close(fd);
527 if (n < 4) /* at least '#!/x' and not error */
528 return NULL;
530 if (buf[0] != '#' || buf[1] != '!')
531 return NULL;
532 buf[n] = '\0';
533 p = buf + strcspn(buf, "\r\n");
534 if (!*p)
535 return NULL;
537 *p = '\0';
538 if (!(p = strrchr(buf+2, '/')) && !(p = strrchr(buf+2, '\\')))
539 return NULL;
540 /* strip options */
541 if ((opt = strchr(p+1, ' ')))
542 *opt = '\0';
543 return p+1;
547 * Splits the PATH into parts.
549 static char **get_path_split(void)
551 char *p, **path, *envpath = getenv("PATH");
552 int i, n = 0;
554 if (!envpath || !*envpath)
555 return NULL;
557 envpath = xstrdup(envpath);
558 p = envpath;
559 while (p) {
560 char *dir = p;
561 p = strchr(p, ';');
562 if (p) *p++ = '\0';
563 if (*dir) { /* not earlier, catches series of ; */
564 ++n;
567 if (!n)
568 return NULL;
570 path = xmalloc((n+1)*sizeof(char *));
571 p = envpath;
572 i = 0;
573 do {
574 if (*p)
575 path[i++] = xstrdup(p);
576 p = p+strlen(p)+1;
577 } while (i < n);
578 path[i] = NULL;
580 free(envpath);
582 return path;
585 static void free_path_split(char **path)
587 char **p = path;
589 if (!path)
590 return;
592 while (*p)
593 free(*p++);
594 free(path);
598 * exe_only means that we only want to detect .exe files, but not scripts
599 * (which do not have an extension)
601 static char *lookup_prog(const char *dir, const char *cmd, int isexe, int exe_only)
603 char path[MAX_PATH];
604 snprintf(path, sizeof(path), "%s/%s.exe", dir, cmd);
606 if (!isexe && access(path, F_OK) == 0)
607 return xstrdup(path);
608 path[strlen(path)-4] = '\0';
609 if ((!exe_only || isexe) && access(path, F_OK) == 0)
610 if (!(GetFileAttributes(path) & FILE_ATTRIBUTE_DIRECTORY))
611 return xstrdup(path);
612 return NULL;
616 * Determines the absolute path of cmd using the the split path in path.
617 * If cmd contains a slash or backslash, no lookup is performed.
619 static char *path_lookup(const char *cmd, char **path, int exe_only)
621 char *prog = NULL;
622 int len = strlen(cmd);
623 int isexe = len >= 4 && !strcasecmp(cmd+len-4, ".exe");
625 if (strchr(cmd, '/') || strchr(cmd, '\\'))
626 prog = xstrdup(cmd);
628 while (!prog && *path)
629 prog = lookup_prog(*path++, cmd, isexe, exe_only);
631 return prog;
634 static int env_compare(const void *a, const void *b)
636 char *const *ea = a;
637 char *const *eb = b;
638 return strcasecmp(*ea, *eb);
641 static pid_t mingw_spawnve(const char *cmd, const char **argv, char **env,
642 int prepend_cmd)
644 STARTUPINFO si;
645 PROCESS_INFORMATION pi;
646 struct strbuf envblk, args;
647 unsigned flags;
648 BOOL ret;
650 /* Determine whether or not we are associated to a console */
651 HANDLE cons = CreateFile("CONOUT$", GENERIC_WRITE,
652 FILE_SHARE_WRITE, NULL, OPEN_EXISTING,
653 FILE_ATTRIBUTE_NORMAL, NULL);
654 if (cons == INVALID_HANDLE_VALUE) {
655 /* There is no console associated with this process.
656 * Since the child is a console process, Windows
657 * would normally create a console window. But
658 * since we'll be redirecting std streams, we do
659 * not need the console.
660 * It is necessary to use DETACHED_PROCESS
661 * instead of CREATE_NO_WINDOW to make ssh
662 * recognize that it has no console.
664 flags = DETACHED_PROCESS;
665 } else {
666 /* There is already a console. If we specified
667 * DETACHED_PROCESS here, too, Windows would
668 * disassociate the child from the console.
669 * The same is true for CREATE_NO_WINDOW.
670 * Go figure!
672 flags = 0;
673 CloseHandle(cons);
675 memset(&si, 0, sizeof(si));
676 si.cb = sizeof(si);
677 si.dwFlags = STARTF_USESTDHANDLES;
678 si.hStdInput = (HANDLE) _get_osfhandle(0);
679 si.hStdOutput = (HANDLE) _get_osfhandle(1);
680 si.hStdError = (HANDLE) _get_osfhandle(2);
682 /* concatenate argv, quoting args as we go */
683 strbuf_init(&args, 0);
684 if (prepend_cmd) {
685 char *quoted = (char *)quote_arg(cmd);
686 strbuf_addstr(&args, quoted);
687 if (quoted != cmd)
688 free(quoted);
690 for (; *argv; argv++) {
691 char *quoted = (char *)quote_arg(*argv);
692 if (*args.buf)
693 strbuf_addch(&args, ' ');
694 strbuf_addstr(&args, quoted);
695 if (quoted != *argv)
696 free(quoted);
699 if (env) {
700 int count = 0;
701 char **e, **sorted_env;
703 for (e = env; *e; e++)
704 count++;
706 /* environment must be sorted */
707 sorted_env = xmalloc(sizeof(*sorted_env) * (count + 1));
708 memcpy(sorted_env, env, sizeof(*sorted_env) * (count + 1));
709 qsort(sorted_env, count, sizeof(*sorted_env), env_compare);
711 strbuf_init(&envblk, 0);
712 for (e = sorted_env; *e; e++) {
713 strbuf_addstr(&envblk, *e);
714 strbuf_addch(&envblk, '\0');
716 free(sorted_env);
719 memset(&pi, 0, sizeof(pi));
720 ret = CreateProcess(cmd, args.buf, NULL, NULL, TRUE, flags,
721 env ? envblk.buf : NULL, NULL, &si, &pi);
723 if (env)
724 strbuf_release(&envblk);
725 strbuf_release(&args);
727 if (!ret) {
728 errno = ENOENT;
729 return -1;
731 CloseHandle(pi.hThread);
732 return (pid_t)pi.hProcess;
735 pid_t mingw_spawnvpe(const char *cmd, const char **argv, char **env)
737 pid_t pid;
738 char **path = get_path_split();
739 char *prog = path_lookup(cmd, path, 0);
741 if (!prog) {
742 errno = ENOENT;
743 pid = -1;
745 else {
746 const char *interpr = parse_interpreter(prog);
748 if (interpr) {
749 const char *argv0 = argv[0];
750 char *iprog = path_lookup(interpr, path, 1);
751 argv[0] = prog;
752 if (!iprog) {
753 errno = ENOENT;
754 pid = -1;
756 else {
757 pid = mingw_spawnve(iprog, argv, env, 1);
758 free(iprog);
760 argv[0] = argv0;
762 else
763 pid = mingw_spawnve(prog, argv, env, 0);
764 free(prog);
766 free_path_split(path);
767 return pid;
770 static int try_shell_exec(const char *cmd, char *const *argv, char **env)
772 const char *interpr = parse_interpreter(cmd);
773 char **path;
774 char *prog;
775 int pid = 0;
777 if (!interpr)
778 return 0;
779 path = get_path_split();
780 prog = path_lookup(interpr, path, 1);
781 if (prog) {
782 int argc = 0;
783 const char **argv2;
784 while (argv[argc]) argc++;
785 argv2 = xmalloc(sizeof(*argv) * (argc+1));
786 argv2[0] = (char *)cmd; /* full path to the script file */
787 memcpy(&argv2[1], &argv[1], sizeof(*argv) * argc);
788 pid = mingw_spawnve(prog, argv2, env, 1);
789 if (pid >= 0) {
790 int status;
791 if (waitpid(pid, &status, 0) < 0)
792 status = 255;
793 exit(status);
795 pid = 1; /* indicate that we tried but failed */
796 free(prog);
797 free(argv2);
799 free_path_split(path);
800 return pid;
803 static void mingw_execve(const char *cmd, char *const *argv, char *const *env)
805 /* check if git_command is a shell script */
806 if (!try_shell_exec(cmd, argv, (char **)env)) {
807 int pid, status;
809 pid = mingw_spawnve(cmd, (const char **)argv, (char **)env, 0);
810 if (pid < 0)
811 return;
812 if (waitpid(pid, &status, 0) < 0)
813 status = 255;
814 exit(status);
818 void mingw_execvp(const char *cmd, char *const *argv)
820 char **path = get_path_split();
821 char *prog = path_lookup(cmd, path, 0);
823 if (prog) {
824 mingw_execve(prog, argv, environ);
825 free(prog);
826 } else
827 errno = ENOENT;
829 free_path_split(path);
832 static char **copy_environ(void)
834 char **env;
835 int i = 0;
836 while (environ[i])
837 i++;
838 env = xmalloc((i+1)*sizeof(*env));
839 for (i = 0; environ[i]; i++)
840 env[i] = xstrdup(environ[i]);
841 env[i] = NULL;
842 return env;
845 void free_environ(char **env)
847 int i;
848 for (i = 0; env[i]; i++)
849 free(env[i]);
850 free(env);
853 static int lookup_env(char **env, const char *name, size_t nmln)
855 int i;
857 for (i = 0; env[i]; i++) {
858 if (0 == strncmp(env[i], name, nmln)
859 && '=' == env[i][nmln])
860 /* matches */
861 return i;
863 return -1;
867 * If name contains '=', then sets the variable, otherwise it unsets it
869 static char **env_setenv(char **env, const char *name)
871 char *eq = strchrnul(name, '=');
872 int i = lookup_env(env, name, eq-name);
874 if (i < 0) {
875 if (*eq) {
876 for (i = 0; env[i]; i++)
878 env = xrealloc(env, (i+2)*sizeof(*env));
879 env[i] = xstrdup(name);
880 env[i+1] = NULL;
883 else {
884 free(env[i]);
885 if (*eq)
886 env[i] = xstrdup(name);
887 else
888 for (; env[i]; i++)
889 env[i] = env[i+1];
891 return env;
895 * Copies global environ and adjusts variables as specified by vars.
897 char **make_augmented_environ(const char *const *vars)
899 char **env = copy_environ();
901 while (*vars)
902 env = env_setenv(env, *vars++);
903 return env;
906 /* this is the first function to call into WS_32; initialize it */
907 #undef gethostbyname
908 struct hostent *mingw_gethostbyname(const char *host)
910 WSADATA wsa;
912 if (WSAStartup(MAKEWORD(2,2), &wsa))
913 die("unable to initialize winsock subsystem, error %d",
914 WSAGetLastError());
915 atexit((void(*)(void)) WSACleanup);
916 return gethostbyname(host);
919 int mingw_socket(int domain, int type, int protocol)
921 int sockfd;
922 SOCKET s = WSASocket(domain, type, protocol, NULL, 0, 0);
923 if (s == INVALID_SOCKET) {
925 * WSAGetLastError() values are regular BSD error codes
926 * biased by WSABASEERR.
927 * However, strerror() does not know about networking
928 * specific errors, which are values beginning at 38 or so.
929 * Therefore, we choose to leave the biased error code
930 * in errno so that _if_ someone looks up the code somewhere,
931 * then it is at least the number that are usually listed.
933 errno = WSAGetLastError();
934 return -1;
936 /* convert into a file descriptor */
937 if ((sockfd = _open_osfhandle(s, O_RDWR|O_BINARY)) < 0) {
938 closesocket(s);
939 return error("unable to make a socket file descriptor: %s",
940 strerror(errno));
942 return sockfd;
945 #undef connect
946 int mingw_connect(int sockfd, struct sockaddr *sa, size_t sz)
948 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
949 return connect(s, sa, sz);
952 #undef rename
953 int mingw_rename(const char *pold, const char *pnew)
955 DWORD attrs, gle;
956 int tries = 0;
957 static const int delay[] = { 0, 1, 10, 20, 40 };
960 * Try native rename() first to get errno right.
961 * It is based on MoveFile(), which cannot overwrite existing files.
963 if (!rename(pold, pnew))
964 return 0;
965 if (errno != EEXIST)
966 return -1;
967 repeat:
968 if (MoveFileEx(pold, pnew, MOVEFILE_REPLACE_EXISTING))
969 return 0;
970 /* TODO: translate more errors */
971 gle = GetLastError();
972 if (gle == ERROR_ACCESS_DENIED &&
973 (attrs = GetFileAttributes(pnew)) != INVALID_FILE_ATTRIBUTES) {
974 if (attrs & FILE_ATTRIBUTE_DIRECTORY) {
975 errno = EISDIR;
976 return -1;
978 if ((attrs & FILE_ATTRIBUTE_READONLY) &&
979 SetFileAttributes(pnew, attrs & ~FILE_ATTRIBUTE_READONLY)) {
980 if (MoveFileEx(pold, pnew, MOVEFILE_REPLACE_EXISTING))
981 return 0;
982 gle = GetLastError();
983 /* revert file attributes on failure */
984 SetFileAttributes(pnew, attrs);
987 if (tries < ARRAY_SIZE(delay) && gle == ERROR_ACCESS_DENIED) {
989 * We assume that some other process had the source or
990 * destination file open at the wrong moment and retry.
991 * In order to give the other process a higher chance to
992 * complete its operation, we give up our time slice now.
993 * If we have to retry again, we do sleep a bit.
995 Sleep(delay[tries]);
996 tries++;
997 goto repeat;
999 errno = EACCES;
1000 return -1;
1003 struct passwd *getpwuid(int uid)
1005 static char user_name[100];
1006 static struct passwd p;
1008 DWORD len = sizeof(user_name);
1009 if (!GetUserName(user_name, &len))
1010 return NULL;
1011 p.pw_name = user_name;
1012 p.pw_gecos = "unknown";
1013 p.pw_dir = NULL;
1014 return &p;
1017 static HANDLE timer_event;
1018 static HANDLE timer_thread;
1019 static int timer_interval;
1020 static int one_shot;
1021 static sig_handler_t timer_fn = SIG_DFL;
1023 /* The timer works like this:
1024 * The thread, ticktack(), is a trivial routine that most of the time
1025 * only waits to receive the signal to terminate. The main thread tells
1026 * the thread to terminate by setting the timer_event to the signalled
1027 * state.
1028 * But ticktack() interrupts the wait state after the timer's interval
1029 * length to call the signal handler.
1032 static unsigned __stdcall ticktack(void *dummy)
1034 while (WaitForSingleObject(timer_event, timer_interval) == WAIT_TIMEOUT) {
1035 if (timer_fn == SIG_DFL)
1036 die("Alarm");
1037 if (timer_fn != SIG_IGN)
1038 timer_fn(SIGALRM);
1039 if (one_shot)
1040 break;
1042 return 0;
1045 static int start_timer_thread(void)
1047 timer_event = CreateEvent(NULL, FALSE, FALSE, NULL);
1048 if (timer_event) {
1049 timer_thread = (HANDLE) _beginthreadex(NULL, 0, ticktack, NULL, 0, NULL);
1050 if (!timer_thread )
1051 return errno = ENOMEM,
1052 error("cannot start timer thread");
1053 } else
1054 return errno = ENOMEM,
1055 error("cannot allocate resources for timer");
1056 return 0;
1059 static void stop_timer_thread(void)
1061 if (timer_event)
1062 SetEvent(timer_event); /* tell thread to terminate */
1063 if (timer_thread) {
1064 int rc = WaitForSingleObject(timer_thread, 1000);
1065 if (rc == WAIT_TIMEOUT)
1066 error("timer thread did not terminate timely");
1067 else if (rc != WAIT_OBJECT_0)
1068 error("waiting for timer thread failed: %lu",
1069 GetLastError());
1070 CloseHandle(timer_thread);
1072 if (timer_event)
1073 CloseHandle(timer_event);
1074 timer_event = NULL;
1075 timer_thread = NULL;
1078 static inline int is_timeval_eq(const struct timeval *i1, const struct timeval *i2)
1080 return i1->tv_sec == i2->tv_sec && i1->tv_usec == i2->tv_usec;
1083 int setitimer(int type, struct itimerval *in, struct itimerval *out)
1085 static const struct timeval zero;
1086 static int atexit_done;
1088 if (out != NULL)
1089 return errno = EINVAL,
1090 error("setitimer param 3 != NULL not implemented");
1091 if (!is_timeval_eq(&in->it_interval, &zero) &&
1092 !is_timeval_eq(&in->it_interval, &in->it_value))
1093 return errno = EINVAL,
1094 error("setitimer: it_interval must be zero or eq it_value");
1096 if (timer_thread)
1097 stop_timer_thread();
1099 if (is_timeval_eq(&in->it_value, &zero) &&
1100 is_timeval_eq(&in->it_interval, &zero))
1101 return 0;
1103 timer_interval = in->it_value.tv_sec * 1000 + in->it_value.tv_usec / 1000;
1104 one_shot = is_timeval_eq(&in->it_interval, &zero);
1105 if (!atexit_done) {
1106 atexit(stop_timer_thread);
1107 atexit_done = 1;
1109 return start_timer_thread();
1112 int sigaction(int sig, struct sigaction *in, struct sigaction *out)
1114 if (sig != SIGALRM)
1115 return errno = EINVAL,
1116 error("sigaction only implemented for SIGALRM");
1117 if (out != NULL)
1118 return errno = EINVAL,
1119 error("sigaction: param 3 != NULL not implemented");
1121 timer_fn = in->sa_handler;
1122 return 0;
1125 #undef signal
1126 sig_handler_t mingw_signal(int sig, sig_handler_t handler)
1128 sig_handler_t old = timer_fn;
1129 if (sig != SIGALRM)
1130 return signal(sig, handler);
1131 timer_fn = handler;
1132 return old;
1135 static const char *make_backslash_path(const char *path)
1137 static char buf[PATH_MAX + 1];
1138 char *c;
1140 if (strlcpy(buf, path, PATH_MAX) >= PATH_MAX)
1141 die("Too long path: %.*s", 60, path);
1143 for (c = buf; *c; c++) {
1144 if (*c == '/')
1145 *c = '\\';
1147 return buf;
1150 void mingw_open_html(const char *unixpath)
1152 const char *htmlpath = make_backslash_path(unixpath);
1153 printf("Launching default browser to display HTML ...\n");
1154 ShellExecute(NULL, "open", htmlpath, NULL, "\\", 0);
1157 int link(const char *oldpath, const char *newpath)
1159 typedef BOOL (WINAPI *T)(const char*, const char*, LPSECURITY_ATTRIBUTES);
1160 static T create_hard_link = NULL;
1161 if (!create_hard_link) {
1162 create_hard_link = (T) GetProcAddress(
1163 GetModuleHandle("kernel32.dll"), "CreateHardLinkA");
1164 if (!create_hard_link)
1165 create_hard_link = (T)-1;
1167 if (create_hard_link == (T)-1) {
1168 errno = ENOSYS;
1169 return -1;
1171 if (!create_hard_link(newpath, oldpath, NULL)) {
1172 errno = err_win_to_posix(GetLastError());
1173 return -1;
1175 return 0;
1178 char *getpass(const char *prompt)
1180 struct strbuf buf = STRBUF_INIT;
1182 fputs(prompt, stderr);
1183 for (;;) {
1184 char c = _getch();
1185 if (c == '\r' || c == '\n')
1186 break;
1187 strbuf_addch(&buf, c);
1189 fputs("\n", stderr);
1190 return strbuf_detach(&buf, NULL);
1193 #ifndef NO_MINGW_REPLACE_READDIR
1194 /* MinGW readdir implementation to avoid extra lstats for Git */
1195 struct mingw_DIR
1197 struct _finddata_t dd_dta; /* disk transfer area for this dir */
1198 struct mingw_dirent dd_dir; /* Our own implementation, including d_type */
1199 long dd_handle; /* _findnext handle */
1200 int dd_stat; /* 0 = next entry to read is first entry, -1 = off the end, positive = 0 based index of next entry */
1201 char dd_name[1]; /* given path for dir with search pattern (struct is extended) */
1204 struct dirent *mingw_readdir(DIR *dir)
1206 WIN32_FIND_DATAA buf;
1207 HANDLE handle;
1208 struct mingw_DIR *mdir = (struct mingw_DIR*)dir;
1210 if (!dir->dd_handle) {
1211 errno = EBADF; /* No set_errno for mingw */
1212 return NULL;
1215 if (dir->dd_handle == (long)INVALID_HANDLE_VALUE && dir->dd_stat == 0)
1217 DWORD lasterr;
1218 handle = FindFirstFileA(dir->dd_name, &buf);
1219 lasterr = GetLastError();
1220 dir->dd_handle = (long)handle;
1221 if (handle == INVALID_HANDLE_VALUE && (lasterr != ERROR_NO_MORE_FILES)) {
1222 errno = err_win_to_posix(lasterr);
1223 return NULL;
1225 } else if (dir->dd_handle == (long)INVALID_HANDLE_VALUE) {
1226 return NULL;
1227 } else if (!FindNextFileA((HANDLE)dir->dd_handle, &buf)) {
1228 DWORD lasterr = GetLastError();
1229 FindClose((HANDLE)dir->dd_handle);
1230 dir->dd_handle = (long)INVALID_HANDLE_VALUE;
1231 /* POSIX says you shouldn't set errno when readdir can't
1232 find any more files; so, if another error we leave it set. */
1233 if (lasterr != ERROR_NO_MORE_FILES)
1234 errno = err_win_to_posix(lasterr);
1235 return NULL;
1238 /* We get here if `buf' contains valid data. */
1239 strcpy(dir->dd_dir.d_name, buf.cFileName);
1240 ++dir->dd_stat;
1242 /* Set file type, based on WIN32_FIND_DATA */
1243 mdir->dd_dir.d_type = 0;
1244 if (buf.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)
1245 mdir->dd_dir.d_type |= DT_DIR;
1246 else
1247 mdir->dd_dir.d_type |= DT_REG;
1249 return (struct dirent*)&dir->dd_dir;
1251 #endif // !NO_MINGW_REPLACE_READDIR