SubmittingPathces: remove Cogito reference
[git/dscho.git] / compat / mingw.c
blobf6e9ff7762356e099d2fe20fd31359bc0a1f68a2
1 #include "../git-compat-util.h"
2 #include "win32.h"
3 #include <conio.h>
4 #include "../strbuf.h"
5 #include "../run-command.h"
7 static const int delay[] = { 0, 1, 10, 20, 40 };
9 int err_win_to_posix(DWORD winerr)
11 int error = ENOSYS;
12 switch(winerr) {
13 case ERROR_ACCESS_DENIED: error = EACCES; break;
14 case ERROR_ACCOUNT_DISABLED: error = EACCES; break;
15 case ERROR_ACCOUNT_RESTRICTION: error = EACCES; break;
16 case ERROR_ALREADY_ASSIGNED: error = EBUSY; break;
17 case ERROR_ALREADY_EXISTS: error = EEXIST; break;
18 case ERROR_ARITHMETIC_OVERFLOW: error = ERANGE; break;
19 case ERROR_BAD_COMMAND: error = EIO; break;
20 case ERROR_BAD_DEVICE: error = ENODEV; break;
21 case ERROR_BAD_DRIVER_LEVEL: error = ENXIO; break;
22 case ERROR_BAD_EXE_FORMAT: error = ENOEXEC; break;
23 case ERROR_BAD_FORMAT: error = ENOEXEC; break;
24 case ERROR_BAD_LENGTH: error = EINVAL; break;
25 case ERROR_BAD_PATHNAME: error = ENOENT; break;
26 case ERROR_BAD_PIPE: error = EPIPE; break;
27 case ERROR_BAD_UNIT: error = ENODEV; break;
28 case ERROR_BAD_USERNAME: error = EINVAL; break;
29 case ERROR_BROKEN_PIPE: error = EPIPE; break;
30 case ERROR_BUFFER_OVERFLOW: error = ENAMETOOLONG; break;
31 case ERROR_BUSY: error = EBUSY; break;
32 case ERROR_BUSY_DRIVE: error = EBUSY; break;
33 case ERROR_CALL_NOT_IMPLEMENTED: error = ENOSYS; break;
34 case ERROR_CANNOT_MAKE: error = EACCES; break;
35 case ERROR_CANTOPEN: error = EIO; break;
36 case ERROR_CANTREAD: error = EIO; break;
37 case ERROR_CANTWRITE: error = EIO; break;
38 case ERROR_CRC: error = EIO; break;
39 case ERROR_CURRENT_DIRECTORY: error = EACCES; break;
40 case ERROR_DEVICE_IN_USE: error = EBUSY; break;
41 case ERROR_DEV_NOT_EXIST: error = ENODEV; break;
42 case ERROR_DIRECTORY: error = EINVAL; break;
43 case ERROR_DIR_NOT_EMPTY: error = ENOTEMPTY; break;
44 case ERROR_DISK_CHANGE: error = EIO; break;
45 case ERROR_DISK_FULL: error = ENOSPC; break;
46 case ERROR_DRIVE_LOCKED: error = EBUSY; break;
47 case ERROR_ENVVAR_NOT_FOUND: error = EINVAL; break;
48 case ERROR_EXE_MARKED_INVALID: error = ENOEXEC; break;
49 case ERROR_FILENAME_EXCED_RANGE: error = ENAMETOOLONG; break;
50 case ERROR_FILE_EXISTS: error = EEXIST; break;
51 case ERROR_FILE_INVALID: error = ENODEV; break;
52 case ERROR_FILE_NOT_FOUND: error = ENOENT; break;
53 case ERROR_GEN_FAILURE: error = EIO; break;
54 case ERROR_HANDLE_DISK_FULL: error = ENOSPC; break;
55 case ERROR_INSUFFICIENT_BUFFER: error = ENOMEM; break;
56 case ERROR_INVALID_ACCESS: error = EACCES; break;
57 case ERROR_INVALID_ADDRESS: error = EFAULT; break;
58 case ERROR_INVALID_BLOCK: error = EFAULT; break;
59 case ERROR_INVALID_DATA: error = EINVAL; break;
60 case ERROR_INVALID_DRIVE: error = ENODEV; break;
61 case ERROR_INVALID_EXE_SIGNATURE: error = ENOEXEC; break;
62 case ERROR_INVALID_FLAGS: error = EINVAL; break;
63 case ERROR_INVALID_FUNCTION: error = ENOSYS; break;
64 case ERROR_INVALID_HANDLE: error = EBADF; break;
65 case ERROR_INVALID_LOGON_HOURS: error = EACCES; break;
66 case ERROR_INVALID_NAME: error = EINVAL; break;
67 case ERROR_INVALID_OWNER: error = EINVAL; break;
68 case ERROR_INVALID_PARAMETER: error = EINVAL; break;
69 case ERROR_INVALID_PASSWORD: error = EPERM; break;
70 case ERROR_INVALID_PRIMARY_GROUP: error = EINVAL; break;
71 case ERROR_INVALID_SIGNAL_NUMBER: error = EINVAL; break;
72 case ERROR_INVALID_TARGET_HANDLE: error = EIO; break;
73 case ERROR_INVALID_WORKSTATION: error = EACCES; break;
74 case ERROR_IO_DEVICE: error = EIO; break;
75 case ERROR_IO_INCOMPLETE: error = EINTR; break;
76 case ERROR_LOCKED: error = EBUSY; break;
77 case ERROR_LOCK_VIOLATION: error = EACCES; break;
78 case ERROR_LOGON_FAILURE: error = EACCES; break;
79 case ERROR_MAPPED_ALIGNMENT: error = EINVAL; break;
80 case ERROR_META_EXPANSION_TOO_LONG: error = E2BIG; break;
81 case ERROR_MORE_DATA: error = EPIPE; break;
82 case ERROR_NEGATIVE_SEEK: error = ESPIPE; break;
83 case ERROR_NOACCESS: error = EFAULT; break;
84 case ERROR_NONE_MAPPED: error = EINVAL; break;
85 case ERROR_NOT_ENOUGH_MEMORY: error = ENOMEM; break;
86 case ERROR_NOT_READY: error = EAGAIN; break;
87 case ERROR_NOT_SAME_DEVICE: error = EXDEV; break;
88 case ERROR_NO_DATA: error = EPIPE; break;
89 case ERROR_NO_MORE_SEARCH_HANDLES: error = EIO; break;
90 case ERROR_NO_PROC_SLOTS: error = EAGAIN; break;
91 case ERROR_NO_SUCH_PRIVILEGE: error = EACCES; break;
92 case ERROR_OPEN_FAILED: error = EIO; break;
93 case ERROR_OPEN_FILES: error = EBUSY; break;
94 case ERROR_OPERATION_ABORTED: error = EINTR; break;
95 case ERROR_OUTOFMEMORY: error = ENOMEM; break;
96 case ERROR_PASSWORD_EXPIRED: error = EACCES; break;
97 case ERROR_PATH_BUSY: error = EBUSY; break;
98 case ERROR_PATH_NOT_FOUND: error = ENOENT; break;
99 case ERROR_PIPE_BUSY: error = EBUSY; break;
100 case ERROR_PIPE_CONNECTED: error = EPIPE; break;
101 case ERROR_PIPE_LISTENING: error = EPIPE; break;
102 case ERROR_PIPE_NOT_CONNECTED: error = EPIPE; break;
103 case ERROR_PRIVILEGE_NOT_HELD: error = EACCES; break;
104 case ERROR_READ_FAULT: error = EIO; break;
105 case ERROR_SEEK: error = EIO; break;
106 case ERROR_SEEK_ON_DEVICE: error = ESPIPE; break;
107 case ERROR_SHARING_BUFFER_EXCEEDED: error = ENFILE; break;
108 case ERROR_SHARING_VIOLATION: error = EACCES; break;
109 case ERROR_STACK_OVERFLOW: error = ENOMEM; break;
110 case ERROR_SWAPERROR: error = ENOENT; break;
111 case ERROR_TOO_MANY_MODULES: error = EMFILE; break;
112 case ERROR_TOO_MANY_OPEN_FILES: error = EMFILE; break;
113 case ERROR_UNRECOGNIZED_MEDIA: error = ENXIO; break;
114 case ERROR_UNRECOGNIZED_VOLUME: error = ENODEV; break;
115 case ERROR_WAIT_NO_CHILDREN: error = ECHILD; break;
116 case ERROR_WRITE_FAULT: error = EIO; break;
117 case ERROR_WRITE_PROTECT: error = EROFS; break;
119 return error;
122 static inline int is_file_in_use_error(DWORD errcode)
124 switch (errcode) {
125 case ERROR_SHARING_VIOLATION:
126 case ERROR_ACCESS_DENIED:
127 return 1;
130 return 0;
133 static int read_yes_no_answer(void)
135 char answer[1024];
137 if (fgets(answer, sizeof(answer), stdin)) {
138 size_t answer_len = strlen(answer);
139 int got_full_line = 0, c;
141 /* remove the newline */
142 if (answer_len >= 2 && answer[answer_len-2] == '\r') {
143 answer[answer_len-2] = '\0';
144 got_full_line = 1;
145 } else if (answer_len >= 1 && answer[answer_len-1] == '\n') {
146 answer[answer_len-1] = '\0';
147 got_full_line = 1;
149 /* flush the buffer in case we did not get the full line */
150 if (!got_full_line)
151 while ((c = getchar()) != EOF && c != '\n')
153 } else
154 /* we could not read, return the
155 * default answer which is no */
156 return 0;
158 if (tolower(answer[0]) == 'y' && !answer[1])
159 return 1;
160 if (!strncasecmp(answer, "yes", sizeof(answer)))
161 return 1;
162 if (tolower(answer[0]) == 'n' && !answer[1])
163 return 0;
164 if (!strncasecmp(answer, "no", sizeof(answer)))
165 return 0;
167 /* did not find an answer we understand */
168 return -1;
171 static int ask_yes_no_if_possible(const char *format, ...)
173 char question[4096];
174 const char *retry_hook[] = { NULL, NULL, NULL };
175 va_list args;
177 va_start(args, format);
178 vsnprintf(question, sizeof(question), format, args);
179 va_end(args);
181 if ((retry_hook[0] = getenv("GIT_ASK_YESNO"))) {
182 retry_hook[1] = question;
183 return !run_command_v_opt(retry_hook, 0);
186 if (!isatty(_fileno(stdin)) || !isatty(_fileno(stderr)))
187 return 0;
189 while (1) {
190 int answer;
191 fprintf(stderr, "%s (y/n) ", question);
193 if ((answer = read_yes_no_answer()) >= 0)
194 return answer;
196 fprintf(stderr, "Sorry, I did not understand your answer. "
197 "Please type 'y' or 'n'\n");
201 #undef unlink
202 int mingw_unlink(const char *pathname)
204 int ret, tries = 0;
206 /* read-only files cannot be removed */
207 chmod(pathname, 0666);
208 while ((ret = unlink(pathname)) == -1 && tries < ARRAY_SIZE(delay)) {
209 if (!is_file_in_use_error(GetLastError()))
210 break;
212 * We assume that some other process had the source or
213 * destination file open at the wrong moment and retry.
214 * In order to give the other process a higher chance to
215 * complete its operation, we give up our time slice now.
216 * If we have to retry again, we do sleep a bit.
218 Sleep(delay[tries]);
219 tries++;
221 while (ret == -1 && is_file_in_use_error(GetLastError()) &&
222 ask_yes_no_if_possible("Unlink of file '%s' failed. "
223 "Should I try again?", pathname))
224 ret = unlink(pathname);
225 return ret;
228 static int is_dir_empty(const char *path)
230 struct strbuf buf = STRBUF_INIT;
231 WIN32_FIND_DATAA findbuf;
232 HANDLE handle;
234 strbuf_addf(&buf, "%s\\*", path);
235 handle = FindFirstFileA(buf.buf, &findbuf);
236 if (handle == INVALID_HANDLE_VALUE) {
237 strbuf_release(&buf);
238 return GetLastError() == ERROR_NO_MORE_FILES;
241 while (!strcmp(findbuf.cFileName, ".") ||
242 !strcmp(findbuf.cFileName, ".."))
243 if (!FindNextFile(handle, &findbuf)) {
244 strbuf_release(&buf);
245 return GetLastError() == ERROR_NO_MORE_FILES;
247 FindClose(handle);
248 strbuf_release(&buf);
249 return 0;
252 #undef rmdir
253 int mingw_rmdir(const char *pathname)
255 int ret, tries = 0;
257 while ((ret = rmdir(pathname)) == -1 && tries < ARRAY_SIZE(delay)) {
258 if (!is_file_in_use_error(GetLastError()))
259 break;
260 if (!is_dir_empty(pathname)) {
261 errno = ENOTEMPTY;
262 break;
265 * We assume that some other process had the source or
266 * destination file open at the wrong moment and retry.
267 * In order to give the other process a higher chance to
268 * complete its operation, we give up our time slice now.
269 * If we have to retry again, we do sleep a bit.
271 Sleep(delay[tries]);
272 tries++;
274 while (ret == -1 && is_file_in_use_error(GetLastError()) &&
275 ask_yes_no_if_possible("Deletion of directory '%s' failed. "
276 "Should I try again?", pathname))
277 ret = rmdir(pathname);
278 return ret;
281 #undef open
282 int mingw_open (const char *filename, int oflags, ...)
284 va_list args;
285 unsigned mode;
286 int fd;
288 va_start(args, oflags);
289 mode = va_arg(args, int);
290 va_end(args);
292 if (filename && !strcmp(filename, "/dev/null"))
293 filename = "nul";
295 fd = open(filename, oflags, mode);
297 if (fd < 0 && (oflags & O_CREAT) && errno == EACCES) {
298 DWORD attrs = GetFileAttributes(filename);
299 if (attrs != INVALID_FILE_ATTRIBUTES && (attrs & FILE_ATTRIBUTE_DIRECTORY))
300 errno = EISDIR;
302 return fd;
305 #undef write
306 ssize_t mingw_write(int fd, const void *buf, size_t count)
309 * While write() calls to a file on a local disk are translated
310 * into WriteFile() calls with a maximum size of 64KB on Windows
311 * XP and 256KB on Vista, no such cap is placed on writes to
312 * files over the network on Windows XP. Unfortunately, there
313 * seems to be a limit of 32MB-28KB on X64 and 64MB-32KB on x86;
314 * bigger writes fail on Windows XP.
315 * So we cap to a nice 31MB here to avoid write failures over
316 * the net without changing the number of WriteFile() calls in
317 * the local case.
319 return write(fd, buf, min(count, 31 * 1024 * 1024));
322 #undef fopen
323 FILE *mingw_fopen (const char *filename, const char *otype)
325 if (filename && !strcmp(filename, "/dev/null"))
326 filename = "nul";
327 return fopen(filename, otype);
330 #undef freopen
331 FILE *mingw_freopen (const char *filename, const char *otype, FILE *stream)
333 if (filename && !strcmp(filename, "/dev/null"))
334 filename = "nul";
335 return freopen(filename, otype, stream);
339 * The unit of FILETIME is 100-nanoseconds since January 1, 1601, UTC.
340 * Returns the 100-nanoseconds ("hekto nanoseconds") since the epoch.
342 static inline long long filetime_to_hnsec(const FILETIME *ft)
344 long long winTime = ((long long)ft->dwHighDateTime << 32) + ft->dwLowDateTime;
345 /* Windows to Unix Epoch conversion */
346 return winTime - 116444736000000000LL;
349 static inline time_t filetime_to_time_t(const FILETIME *ft)
351 return (time_t)(filetime_to_hnsec(ft) / 10000000);
354 /* We keep the do_lstat code in a separate function to avoid recursion.
355 * When a path ends with a slash, the stat will fail with ENOENT. In
356 * this case, we strip the trailing slashes and stat again.
358 * If follow is true then act like stat() and report on the link
359 * target. Otherwise report on the link itself.
361 static int do_lstat(int follow, const char *file_name, struct stat *buf)
363 int err;
364 WIN32_FILE_ATTRIBUTE_DATA fdata;
366 if (!(err = get_file_attr(file_name, &fdata))) {
367 buf->st_ino = 0;
368 buf->st_gid = 0;
369 buf->st_uid = 0;
370 buf->st_nlink = 1;
371 buf->st_mode = file_attr_to_st_mode(fdata.dwFileAttributes);
372 buf->st_size = fdata.nFileSizeLow |
373 (((off_t)fdata.nFileSizeHigh)<<32);
374 buf->st_dev = buf->st_rdev = 0; /* not used by Git */
375 buf->st_atime = filetime_to_time_t(&(fdata.ftLastAccessTime));
376 buf->st_mtime = filetime_to_time_t(&(fdata.ftLastWriteTime));
377 buf->st_ctime = filetime_to_time_t(&(fdata.ftCreationTime));
378 if (fdata.dwFileAttributes & FILE_ATTRIBUTE_REPARSE_POINT) {
379 WIN32_FIND_DATAA findbuf;
380 HANDLE handle = FindFirstFileA(file_name, &findbuf);
381 if (handle != INVALID_HANDLE_VALUE) {
382 if ((findbuf.dwFileAttributes & FILE_ATTRIBUTE_REPARSE_POINT) &&
383 (findbuf.dwReserved0 == IO_REPARSE_TAG_SYMLINK)) {
384 if (follow) {
385 char buffer[MAXIMUM_REPARSE_DATA_BUFFER_SIZE];
386 buf->st_size = readlink(file_name, buffer, MAXIMUM_REPARSE_DATA_BUFFER_SIZE);
387 } else {
388 buf->st_mode = S_IFLNK;
390 buf->st_mode |= S_IREAD;
391 if (!(findbuf.dwFileAttributes & FILE_ATTRIBUTE_READONLY))
392 buf->st_mode |= S_IWRITE;
394 FindClose(handle);
397 return 0;
399 errno = err;
400 return -1;
403 /* We provide our own lstat/fstat functions, since the provided
404 * lstat/fstat functions are so slow. These stat functions are
405 * tailored for Git's usage (read: fast), and are not meant to be
406 * complete. Note that Git stat()s are redirected to mingw_lstat()
407 * too, since Windows doesn't really handle symlinks that well.
409 static int do_stat_internal(int follow, const char *file_name, struct stat *buf)
411 int namelen;
412 static char alt_name[PATH_MAX];
414 if (!do_lstat(follow, file_name, buf))
415 return 0;
417 /* if file_name ended in a '/', Windows returned ENOENT;
418 * try again without trailing slashes
420 if (errno != ENOENT)
421 return -1;
423 namelen = strlen(file_name);
424 if (namelen && file_name[namelen-1] != '/')
425 return -1;
426 while (namelen && file_name[namelen-1] == '/')
427 --namelen;
428 if (!namelen || namelen >= PATH_MAX)
429 return -1;
431 memcpy(alt_name, file_name, namelen);
432 alt_name[namelen] = 0;
433 return do_lstat(follow, alt_name, buf);
436 int mingw_lstat(const char *file_name, struct stat *buf)
438 return do_stat_internal(0, file_name, buf);
440 int mingw_stat(const char *file_name, struct stat *buf)
442 return do_stat_internal(1, file_name, buf);
445 #undef fstat
446 int mingw_fstat(int fd, struct stat *buf)
448 HANDLE fh = (HANDLE)_get_osfhandle(fd);
449 BY_HANDLE_FILE_INFORMATION fdata;
451 if (fh == INVALID_HANDLE_VALUE) {
452 errno = EBADF;
453 return -1;
455 /* direct non-file handles to MS's fstat() */
456 if (GetFileType(fh) != FILE_TYPE_DISK)
457 return _fstati64(fd, buf);
459 if (GetFileInformationByHandle(fh, &fdata)) {
460 buf->st_ino = 0;
461 buf->st_gid = 0;
462 buf->st_uid = 0;
463 buf->st_nlink = 1;
464 buf->st_mode = file_attr_to_st_mode(fdata.dwFileAttributes);
465 buf->st_size = fdata.nFileSizeLow |
466 (((off_t)fdata.nFileSizeHigh)<<32);
467 buf->st_dev = buf->st_rdev = 0; /* not used by Git */
468 buf->st_atime = filetime_to_time_t(&(fdata.ftLastAccessTime));
469 buf->st_mtime = filetime_to_time_t(&(fdata.ftLastWriteTime));
470 buf->st_ctime = filetime_to_time_t(&(fdata.ftCreationTime));
471 return 0;
473 errno = EBADF;
474 return -1;
477 static inline void time_t_to_filetime(time_t t, FILETIME *ft)
479 long long winTime = t * 10000000LL + 116444736000000000LL;
480 ft->dwLowDateTime = winTime;
481 ft->dwHighDateTime = winTime >> 32;
484 int mingw_utime (const char *file_name, const struct utimbuf *times)
486 FILETIME mft, aft;
487 int fh, rc;
489 /* must have write permission */
490 DWORD attrs = GetFileAttributes(file_name);
491 if (attrs != INVALID_FILE_ATTRIBUTES &&
492 (attrs & FILE_ATTRIBUTE_READONLY)) {
493 /* ignore errors here; open() will report them */
494 SetFileAttributes(file_name, attrs & ~FILE_ATTRIBUTE_READONLY);
497 if ((fh = open(file_name, O_RDWR | O_BINARY)) < 0) {
498 rc = -1;
499 goto revert_attrs;
502 if (times) {
503 time_t_to_filetime(times->modtime, &mft);
504 time_t_to_filetime(times->actime, &aft);
505 } else {
506 GetSystemTimeAsFileTime(&mft);
507 aft = mft;
509 if (!SetFileTime((HANDLE)_get_osfhandle(fh), NULL, &aft, &mft)) {
510 errno = EINVAL;
511 rc = -1;
512 } else
513 rc = 0;
514 close(fh);
516 revert_attrs:
517 if (attrs != INVALID_FILE_ATTRIBUTES &&
518 (attrs & FILE_ATTRIBUTE_READONLY)) {
519 /* ignore errors again */
520 SetFileAttributes(file_name, attrs);
522 return rc;
525 unsigned int sleep (unsigned int seconds)
527 Sleep(seconds*1000);
528 return 0;
531 int mkstemp(char *template)
533 char *filename = mktemp(template);
534 if (filename == NULL)
535 return -1;
536 return open(filename, O_RDWR | O_CREAT, 0600);
539 int gettimeofday(struct timeval *tv, void *tz)
541 FILETIME ft;
542 long long hnsec;
544 GetSystemTimeAsFileTime(&ft);
545 hnsec = filetime_to_hnsec(&ft);
546 tv->tv_sec = hnsec / 10000000;
547 tv->tv_usec = (hnsec % 10000000) / 10;
548 return 0;
551 int pipe(int filedes[2])
553 HANDLE h[2];
555 /* this creates non-inheritable handles */
556 if (!CreatePipe(&h[0], &h[1], NULL, 8192)) {
557 errno = err_win_to_posix(GetLastError());
558 return -1;
560 filedes[0] = _open_osfhandle((int)h[0], O_NOINHERIT);
561 if (filedes[0] < 0) {
562 CloseHandle(h[0]);
563 CloseHandle(h[1]);
564 return -1;
566 filedes[1] = _open_osfhandle((int)h[1], O_NOINHERIT);
567 if (filedes[0] < 0) {
568 close(filedes[0]);
569 CloseHandle(h[1]);
570 return -1;
572 return 0;
575 struct tm *gmtime_r(const time_t *timep, struct tm *result)
577 /* gmtime() in MSVCRT.DLL is thread-safe, but not reentrant */
578 memcpy(result, gmtime(timep), sizeof(struct tm));
579 return result;
582 struct tm *localtime_r(const time_t *timep, struct tm *result)
584 /* localtime() in MSVCRT.DLL is thread-safe, but not reentrant */
585 memcpy(result, localtime(timep), sizeof(struct tm));
586 return result;
589 #undef getcwd
590 char *mingw_getcwd(char *pointer, int len)
592 int i;
593 char *ret = getcwd(pointer, len);
594 if (!ret)
595 return ret;
596 for (i = 0; pointer[i]; i++)
597 if (pointer[i] == '\\')
598 pointer[i] = '/';
599 return ret;
602 #undef getenv
603 char *mingw_getenv(const char *name)
605 char *result = getenv(name);
606 if (!result && !strcmp(name, "TMPDIR")) {
607 /* on Windows it is TMP and TEMP */
608 result = getenv("TMP");
609 if (!result)
610 result = getenv("TEMP");
612 return result;
616 * See http://msdn2.microsoft.com/en-us/library/17w5ykft(vs.71).aspx
617 * (Parsing C++ Command-Line Arguments)
619 static const char *quote_arg(const char *arg)
621 /* count chars to quote */
622 int len = 0, n = 0;
623 int force_quotes = 0;
624 char *q, *d;
625 const char *p = arg;
626 if (!*p) force_quotes = 1;
627 while (*p) {
628 if (isspace(*p) || *p == '*' || *p == '?' || *p == '{' || *p == '\'')
629 force_quotes = 1;
630 else if (*p == '"')
631 n++;
632 else if (*p == '\\') {
633 int count = 0;
634 while (*p == '\\') {
635 count++;
636 p++;
637 len++;
639 if (*p == '"')
640 n += count*2 + 1;
641 continue;
643 len++;
644 p++;
646 if (!force_quotes && n == 0)
647 return arg;
649 /* insert \ where necessary */
650 d = q = xmalloc(len+n+3);
651 *d++ = '"';
652 while (*arg) {
653 if (*arg == '"')
654 *d++ = '\\';
655 else if (*arg == '\\') {
656 int count = 0;
657 while (*arg == '\\') {
658 count++;
659 *d++ = *arg++;
661 if (*arg == '"') {
662 while (count-- > 0)
663 *d++ = '\\';
664 *d++ = '\\';
667 *d++ = *arg++;
669 *d++ = '"';
670 *d++ = 0;
671 return q;
674 static const char *parse_interpreter(const char *cmd)
676 static char buf[100];
677 char *p, *opt;
678 int n, fd;
680 /* don't even try a .exe */
681 n = strlen(cmd);
682 if (n >= 4 && !strcasecmp(cmd+n-4, ".exe"))
683 return NULL;
685 fd = open(cmd, O_RDONLY);
686 if (fd < 0)
687 return NULL;
688 n = read(fd, buf, sizeof(buf)-1);
689 close(fd);
690 if (n < 4) /* at least '#!/x' and not error */
691 return NULL;
693 if (buf[0] != '#' || buf[1] != '!')
694 return NULL;
695 buf[n] = '\0';
696 p = buf + strcspn(buf, "\r\n");
697 if (!*p)
698 return NULL;
700 *p = '\0';
701 if (!(p = strrchr(buf+2, '/')) && !(p = strrchr(buf+2, '\\')))
702 return NULL;
703 /* strip options */
704 if ((opt = strchr(p+1, ' ')))
705 *opt = '\0';
706 return p+1;
710 * Splits the PATH into parts.
712 static char **get_path_split(void)
714 char *p, **path, *envpath = getenv("PATH");
715 int i, n = 0;
717 if (!envpath || !*envpath)
718 return NULL;
720 envpath = xstrdup(envpath);
721 p = envpath;
722 while (p) {
723 char *dir = p;
724 p = strchr(p, ';');
725 if (p) *p++ = '\0';
726 if (*dir) { /* not earlier, catches series of ; */
727 ++n;
730 if (!n)
731 return NULL;
733 path = xmalloc((n+1)*sizeof(char *));
734 p = envpath;
735 i = 0;
736 do {
737 if (*p)
738 path[i++] = xstrdup(p);
739 p = p+strlen(p)+1;
740 } while (i < n);
741 path[i] = NULL;
743 free(envpath);
745 return path;
748 static void free_path_split(char **path)
750 char **p = path;
752 if (!path)
753 return;
755 while (*p)
756 free(*p++);
757 free(path);
761 * exe_only means that we only want to detect .exe files, but not scripts
762 * (which do not have an extension)
764 static char *lookup_prog(const char *dir, const char *cmd, int isexe, int exe_only)
766 char path[MAX_PATH];
767 snprintf(path, sizeof(path), "%s/%s.exe", dir, cmd);
769 if (!isexe && access(path, F_OK) == 0)
770 return xstrdup(path);
771 path[strlen(path)-4] = '\0';
772 if ((!exe_only || isexe) && access(path, F_OK) == 0)
773 if (!(GetFileAttributes(path) & FILE_ATTRIBUTE_DIRECTORY))
774 return xstrdup(path);
775 return NULL;
779 * Determines the absolute path of cmd using the split path in path.
780 * If cmd contains a slash or backslash, no lookup is performed.
782 static char *path_lookup(const char *cmd, char **path, int exe_only)
784 char *prog = NULL;
785 int len = strlen(cmd);
786 int isexe = len >= 4 && !strcasecmp(cmd+len-4, ".exe");
788 if (strchr(cmd, '/') || strchr(cmd, '\\'))
789 prog = xstrdup(cmd);
791 while (!prog && *path)
792 prog = lookup_prog(*path++, cmd, isexe, exe_only);
794 return prog;
797 static int env_compare(const void *a, const void *b)
799 char *const *ea = a;
800 char *const *eb = b;
801 return strcasecmp(*ea, *eb);
804 struct pinfo_t {
805 struct pinfo_t *next;
806 pid_t pid;
807 HANDLE proc;
808 } pinfo_t;
809 struct pinfo_t *pinfo = NULL;
810 CRITICAL_SECTION pinfo_cs;
812 static pid_t mingw_spawnve_fd(const char *cmd, const char **argv, char **env,
813 const char *dir,
814 int prepend_cmd, int fhin, int fhout, int fherr)
816 STARTUPINFO si;
817 PROCESS_INFORMATION pi;
818 struct strbuf envblk, args;
819 unsigned flags;
820 BOOL ret;
822 /* Determine whether or not we are associated to a console */
823 HANDLE cons = CreateFile("CONOUT$", GENERIC_WRITE,
824 FILE_SHARE_WRITE, NULL, OPEN_EXISTING,
825 FILE_ATTRIBUTE_NORMAL, NULL);
826 if (cons == INVALID_HANDLE_VALUE) {
827 /* There is no console associated with this process.
828 * Since the child is a console process, Windows
829 * would normally create a console window. But
830 * since we'll be redirecting std streams, we do
831 * not need the console.
832 * It is necessary to use DETACHED_PROCESS
833 * instead of CREATE_NO_WINDOW to make ssh
834 * recognize that it has no console.
836 flags = DETACHED_PROCESS;
837 } else {
838 /* There is already a console. If we specified
839 * DETACHED_PROCESS here, too, Windows would
840 * disassociate the child from the console.
841 * The same is true for CREATE_NO_WINDOW.
842 * Go figure!
844 flags = 0;
845 CloseHandle(cons);
847 memset(&si, 0, sizeof(si));
848 si.cb = sizeof(si);
849 si.dwFlags = STARTF_USESTDHANDLES;
850 si.hStdInput = (HANDLE) _get_osfhandle(fhin);
851 si.hStdOutput = (HANDLE) _get_osfhandle(fhout);
852 si.hStdError = (HANDLE) _get_osfhandle(fherr);
854 /* concatenate argv, quoting args as we go */
855 strbuf_init(&args, 0);
856 if (prepend_cmd) {
857 char *quoted = (char *)quote_arg(cmd);
858 strbuf_addstr(&args, quoted);
859 if (quoted != cmd)
860 free(quoted);
862 for (; *argv; argv++) {
863 char *quoted = (char *)quote_arg(*argv);
864 if (*args.buf)
865 strbuf_addch(&args, ' ');
866 strbuf_addstr(&args, quoted);
867 if (quoted != *argv)
868 free(quoted);
871 if (env) {
872 int count = 0;
873 char **e, **sorted_env;
875 for (e = env; *e; e++)
876 count++;
878 /* environment must be sorted */
879 sorted_env = xmalloc(sizeof(*sorted_env) * (count + 1));
880 memcpy(sorted_env, env, sizeof(*sorted_env) * (count + 1));
881 qsort(sorted_env, count, sizeof(*sorted_env), env_compare);
883 strbuf_init(&envblk, 0);
884 for (e = sorted_env; *e; e++) {
885 strbuf_addstr(&envblk, *e);
886 strbuf_addch(&envblk, '\0');
888 free(sorted_env);
891 memset(&pi, 0, sizeof(pi));
892 ret = CreateProcess(cmd, args.buf, NULL, NULL, TRUE, flags,
893 env ? envblk.buf : NULL, dir, &si, &pi);
895 if (env)
896 strbuf_release(&envblk);
897 strbuf_release(&args);
899 if (!ret) {
900 errno = ENOENT;
901 return -1;
903 CloseHandle(pi.hThread);
906 * The process ID is the human-readable identifier of the process
907 * that we want to present in log and error messages. The handle
908 * is not useful for this purpose. But we cannot close it, either,
909 * because it is not possible to turn a process ID into a process
910 * handle after the process terminated.
911 * Keep the handle in a list for waitpid.
913 EnterCriticalSection(&pinfo_cs);
915 struct pinfo_t *info = xmalloc(sizeof(struct pinfo_t));
916 info->pid = pi.dwProcessId;
917 info->proc = pi.hProcess;
918 info->next = pinfo;
919 pinfo = info;
921 LeaveCriticalSection(&pinfo_cs);
923 return (pid_t)pi.dwProcessId;
926 static pid_t mingw_spawnve(const char *cmd, const char **argv, char **env,
927 int prepend_cmd)
929 return mingw_spawnve_fd(cmd, argv, env, NULL, prepend_cmd, 0, 1, 2);
932 pid_t mingw_spawnvpe(const char *cmd, const char **argv, char **env,
933 const char *dir,
934 int fhin, int fhout, int fherr)
936 pid_t pid;
937 char **path = get_path_split();
938 char *prog = path_lookup(cmd, path, 0);
940 if (!prog) {
941 errno = ENOENT;
942 pid = -1;
944 else {
945 const char *interpr = parse_interpreter(prog);
947 if (interpr) {
948 const char *argv0 = argv[0];
949 char *iprog = path_lookup(interpr, path, 1);
950 argv[0] = prog;
951 if (!iprog) {
952 errno = ENOENT;
953 pid = -1;
955 else {
956 pid = mingw_spawnve_fd(iprog, argv, env, dir, 1,
957 fhin, fhout, fherr);
958 free(iprog);
960 argv[0] = argv0;
962 else
963 pid = mingw_spawnve_fd(prog, argv, env, dir, 0,
964 fhin, fhout, fherr);
965 free(prog);
967 free_path_split(path);
968 return pid;
971 static int try_shell_exec(const char *cmd, char *const *argv, char **env)
973 const char *interpr = parse_interpreter(cmd);
974 char **path;
975 char *prog;
976 int pid = 0;
978 if (!interpr)
979 return 0;
980 path = get_path_split();
981 prog = path_lookup(interpr, path, 1);
982 if (prog) {
983 int argc = 0;
984 const char **argv2;
985 while (argv[argc]) argc++;
986 argv2 = xmalloc(sizeof(*argv) * (argc+1));
987 argv2[0] = (char *)cmd; /* full path to the script file */
988 memcpy(&argv2[1], &argv[1], sizeof(*argv) * argc);
989 pid = mingw_spawnve(prog, argv2, env, 1);
990 if (pid >= 0) {
991 int status;
992 if (waitpid(pid, &status, 0) < 0)
993 status = 255;
994 exit(status);
996 pid = 1; /* indicate that we tried but failed */
997 free(prog);
998 free(argv2);
1000 free_path_split(path);
1001 return pid;
1004 static void mingw_execve(const char *cmd, char *const *argv, char *const *env)
1006 /* check if git_command is a shell script */
1007 if (!try_shell_exec(cmd, argv, (char **)env)) {
1008 int pid, status;
1010 pid = mingw_spawnve(cmd, (const char **)argv, (char **)env, 0);
1011 if (pid < 0)
1012 return;
1013 if (waitpid(pid, &status, 0) < 0)
1014 status = 255;
1015 exit(status);
1019 void mingw_execvp(const char *cmd, char *const *argv)
1021 char **path = get_path_split();
1022 char *prog = path_lookup(cmd, path, 0);
1024 if (prog) {
1025 mingw_execve(prog, argv, environ);
1026 free(prog);
1027 } else
1028 errno = ENOENT;
1030 free_path_split(path);
1033 void mingw_execv(const char *cmd, char *const *argv)
1035 mingw_execve(cmd, argv, environ);
1038 int mingw_kill(pid_t pid, int sig)
1040 if (pid > 0 && sig == SIGTERM) {
1041 HANDLE h = OpenProcess(PROCESS_TERMINATE, FALSE, pid);
1043 if (TerminateProcess(h, -1)) {
1044 CloseHandle(h);
1045 return 0;
1048 errno = err_win_to_posix(GetLastError());
1049 CloseHandle(h);
1050 return -1;
1053 errno = EINVAL;
1054 return -1;
1057 static char **copy_environ(void)
1059 char **env;
1060 int i = 0;
1061 while (environ[i])
1062 i++;
1063 env = xmalloc((i+1)*sizeof(*env));
1064 for (i = 0; environ[i]; i++)
1065 env[i] = xstrdup(environ[i]);
1066 env[i] = NULL;
1067 return env;
1070 void free_environ(char **env)
1072 int i;
1073 for (i = 0; env[i]; i++)
1074 free(env[i]);
1075 free(env);
1078 static int lookup_env(char **env, const char *name, size_t nmln)
1080 int i;
1082 for (i = 0; env[i]; i++) {
1083 if (0 == strncmp(env[i], name, nmln)
1084 && '=' == env[i][nmln])
1085 /* matches */
1086 return i;
1088 return -1;
1092 * If name contains '=', then sets the variable, otherwise it unsets it
1094 static char **env_setenv(char **env, const char *name)
1096 char *eq = strchrnul(name, '=');
1097 int i = lookup_env(env, name, eq-name);
1099 if (i < 0) {
1100 if (*eq) {
1101 for (i = 0; env[i]; i++)
1103 env = xrealloc(env, (i+2)*sizeof(*env));
1104 env[i] = xstrdup(name);
1105 env[i+1] = NULL;
1108 else {
1109 free(env[i]);
1110 if (*eq)
1111 env[i] = xstrdup(name);
1112 else
1113 for (; env[i]; i++)
1114 env[i] = env[i+1];
1116 return env;
1120 * Copies global environ and adjusts variables as specified by vars.
1122 char **make_augmented_environ(const char *const *vars)
1124 char **env = copy_environ();
1126 while (*vars)
1127 env = env_setenv(env, *vars++);
1128 return env;
1132 * Note, this isn't a complete replacement for getaddrinfo. It assumes
1133 * that service contains a numerical port, or that it is null. It
1134 * does a simple search using gethostbyname, and returns one IPv4 host
1135 * if one was found.
1137 static int WSAAPI getaddrinfo_stub(const char *node, const char *service,
1138 const struct addrinfo *hints,
1139 struct addrinfo **res)
1141 struct hostent *h = NULL;
1142 struct addrinfo *ai;
1143 struct sockaddr_in *sin;
1145 if (node) {
1146 h = gethostbyname(node);
1147 if (!h)
1148 return WSAGetLastError();
1151 ai = xmalloc(sizeof(struct addrinfo));
1152 *res = ai;
1153 ai->ai_flags = 0;
1154 ai->ai_family = AF_INET;
1155 ai->ai_socktype = hints ? hints->ai_socktype : 0;
1156 switch (ai->ai_socktype) {
1157 case SOCK_STREAM:
1158 ai->ai_protocol = IPPROTO_TCP;
1159 break;
1160 case SOCK_DGRAM:
1161 ai->ai_protocol = IPPROTO_UDP;
1162 break;
1163 default:
1164 ai->ai_protocol = 0;
1165 break;
1167 ai->ai_addrlen = sizeof(struct sockaddr_in);
1168 if (hints && (hints->ai_flags & AI_CANONNAME))
1169 ai->ai_canonname = h ? strdup(h->h_name) : NULL;
1170 else
1171 ai->ai_canonname = NULL;
1173 sin = xmalloc(ai->ai_addrlen);
1174 memset(sin, 0, ai->ai_addrlen);
1175 sin->sin_family = AF_INET;
1176 /* Note: getaddrinfo is supposed to allow service to be a string,
1177 * which should be looked up using getservbyname. This is
1178 * currently not implemented */
1179 if (service)
1180 sin->sin_port = htons(atoi(service));
1181 if (h)
1182 sin->sin_addr = *(struct in_addr *)h->h_addr;
1183 else if (hints && (hints->ai_flags & AI_PASSIVE))
1184 sin->sin_addr.s_addr = INADDR_ANY;
1185 else
1186 sin->sin_addr.s_addr = INADDR_LOOPBACK;
1187 ai->ai_addr = (struct sockaddr *)sin;
1188 ai->ai_next = 0;
1189 return 0;
1192 static void WSAAPI freeaddrinfo_stub(struct addrinfo *res)
1194 free(res->ai_canonname);
1195 free(res->ai_addr);
1196 free(res);
1199 static int WSAAPI getnameinfo_stub(const struct sockaddr *sa, socklen_t salen,
1200 char *host, DWORD hostlen,
1201 char *serv, DWORD servlen, int flags)
1203 const struct sockaddr_in *sin = (const struct sockaddr_in *)sa;
1204 if (sa->sa_family != AF_INET)
1205 return EAI_FAMILY;
1206 if (!host && !serv)
1207 return EAI_NONAME;
1209 if (host && hostlen > 0) {
1210 struct hostent *ent = NULL;
1211 if (!(flags & NI_NUMERICHOST))
1212 ent = gethostbyaddr((const char *)&sin->sin_addr,
1213 sizeof(sin->sin_addr), AF_INET);
1215 if (ent)
1216 snprintf(host, hostlen, "%s", ent->h_name);
1217 else if (flags & NI_NAMEREQD)
1218 return EAI_NONAME;
1219 else
1220 snprintf(host, hostlen, "%s", inet_ntoa(sin->sin_addr));
1223 if (serv && servlen > 0) {
1224 struct servent *ent = NULL;
1225 if (!(flags & NI_NUMERICSERV))
1226 ent = getservbyport(sin->sin_port,
1227 flags & NI_DGRAM ? "udp" : "tcp");
1229 if (ent)
1230 snprintf(serv, servlen, "%s", ent->s_name);
1231 else
1232 snprintf(serv, servlen, "%d", ntohs(sin->sin_port));
1235 return 0;
1238 static HMODULE ipv6_dll = NULL;
1239 static void (WSAAPI *ipv6_freeaddrinfo)(struct addrinfo *res);
1240 static int (WSAAPI *ipv6_getaddrinfo)(const char *node, const char *service,
1241 const struct addrinfo *hints,
1242 struct addrinfo **res);
1243 static int (WSAAPI *ipv6_getnameinfo)(const struct sockaddr *sa, socklen_t salen,
1244 char *host, DWORD hostlen,
1245 char *serv, DWORD servlen, int flags);
1247 * gai_strerror is an inline function in the ws2tcpip.h header, so we
1248 * don't need to try to load that one dynamically.
1251 static void socket_cleanup(void)
1253 WSACleanup();
1254 if (ipv6_dll)
1255 FreeLibrary(ipv6_dll);
1256 ipv6_dll = NULL;
1257 ipv6_freeaddrinfo = freeaddrinfo_stub;
1258 ipv6_getaddrinfo = getaddrinfo_stub;
1259 ipv6_getnameinfo = getnameinfo_stub;
1262 static void ensure_socket_initialization(void)
1264 WSADATA wsa;
1265 static int initialized = 0;
1266 const char *libraries[] = { "ws2_32.dll", "wship6.dll", NULL };
1267 const char **name;
1269 if (initialized)
1270 return;
1272 if (WSAStartup(MAKEWORD(2,2), &wsa))
1273 die("unable to initialize winsock subsystem, error %d",
1274 WSAGetLastError());
1276 for (name = libraries; *name; name++) {
1277 ipv6_dll = LoadLibrary(*name);
1278 if (!ipv6_dll)
1279 continue;
1281 ipv6_freeaddrinfo = (void (WSAAPI *)(struct addrinfo *))
1282 GetProcAddress(ipv6_dll, "freeaddrinfo");
1283 ipv6_getaddrinfo = (int (WSAAPI *)(const char *, const char *,
1284 const struct addrinfo *,
1285 struct addrinfo **))
1286 GetProcAddress(ipv6_dll, "getaddrinfo");
1287 ipv6_getnameinfo = (int (WSAAPI *)(const struct sockaddr *,
1288 socklen_t, char *, DWORD,
1289 char *, DWORD, int))
1290 GetProcAddress(ipv6_dll, "getnameinfo");
1291 if (!ipv6_freeaddrinfo || !ipv6_getaddrinfo || !ipv6_getnameinfo) {
1292 FreeLibrary(ipv6_dll);
1293 ipv6_dll = NULL;
1294 } else
1295 break;
1297 if (!ipv6_freeaddrinfo || !ipv6_getaddrinfo || !ipv6_getnameinfo) {
1298 ipv6_freeaddrinfo = freeaddrinfo_stub;
1299 ipv6_getaddrinfo = getaddrinfo_stub;
1300 ipv6_getnameinfo = getnameinfo_stub;
1303 atexit(socket_cleanup);
1304 initialized = 1;
1307 #undef gethostbyname
1308 struct hostent *mingw_gethostbyname(const char *host)
1310 ensure_socket_initialization();
1311 return gethostbyname(host);
1314 void mingw_freeaddrinfo(struct addrinfo *res)
1316 ipv6_freeaddrinfo(res);
1319 int mingw_getaddrinfo(const char *node, const char *service,
1320 const struct addrinfo *hints, struct addrinfo **res)
1322 ensure_socket_initialization();
1323 return ipv6_getaddrinfo(node, service, hints, res);
1326 int mingw_getnameinfo(const struct sockaddr *sa, socklen_t salen,
1327 char *host, DWORD hostlen, char *serv, DWORD servlen,
1328 int flags)
1330 ensure_socket_initialization();
1331 return ipv6_getnameinfo(sa, salen, host, hostlen, serv, servlen, flags);
1334 int mingw_socket(int domain, int type, int protocol)
1336 int sockfd;
1337 SOCKET s;
1339 ensure_socket_initialization();
1340 s = WSASocket(domain, type, protocol, NULL, 0, 0);
1341 if (s == INVALID_SOCKET) {
1343 * WSAGetLastError() values are regular BSD error codes
1344 * biased by WSABASEERR.
1345 * However, strerror() does not know about networking
1346 * specific errors, which are values beginning at 38 or so.
1347 * Therefore, we choose to leave the biased error code
1348 * in errno so that _if_ someone looks up the code somewhere,
1349 * then it is at least the number that are usually listed.
1351 errno = WSAGetLastError();
1352 return -1;
1354 /* convert into a file descriptor */
1355 if ((sockfd = _open_osfhandle(s, O_RDWR|O_BINARY)) < 0) {
1356 closesocket(s);
1357 return error("unable to make a socket file descriptor: %s",
1358 strerror(errno));
1360 return sockfd;
1363 #undef connect
1364 int mingw_connect(int sockfd, struct sockaddr *sa, size_t sz)
1366 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
1367 return connect(s, sa, sz);
1370 #undef bind
1371 int mingw_bind(int sockfd, struct sockaddr *sa, size_t sz)
1373 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
1374 return bind(s, sa, sz);
1377 #undef setsockopt
1378 int mingw_setsockopt(int sockfd, int lvl, int optname, void *optval, int optlen)
1380 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
1381 return setsockopt(s, lvl, optname, (const char*)optval, optlen);
1384 #undef shutdown
1385 int mingw_shutdown(int sockfd, int how)
1387 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
1388 return shutdown(s, how);
1391 #undef listen
1392 int mingw_listen(int sockfd, int backlog)
1394 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
1395 return listen(s, backlog);
1398 #undef accept
1399 int mingw_accept(int sockfd1, struct sockaddr *sa, socklen_t *sz)
1401 int sockfd2;
1403 SOCKET s1 = (SOCKET)_get_osfhandle(sockfd1);
1404 SOCKET s2 = accept(s1, sa, sz);
1406 /* convert into a file descriptor */
1407 if ((sockfd2 = _open_osfhandle(s2, O_RDWR|O_BINARY)) < 0) {
1408 int err = errno;
1409 closesocket(s2);
1410 return error("unable to make a socket file descriptor: %s",
1411 strerror(err));
1413 return sockfd2;
1416 #undef rename
1417 int mingw_rename(const char *pold, const char *pnew)
1419 DWORD attrs, gle;
1420 int tries = 0;
1423 * Try native rename() first to get errno right.
1424 * It is based on MoveFile(), which cannot overwrite existing files.
1426 if (!rename(pold, pnew))
1427 return 0;
1428 if (errno != EEXIST)
1429 return -1;
1430 repeat:
1431 if (MoveFileEx(pold, pnew, MOVEFILE_REPLACE_EXISTING))
1432 return 0;
1433 /* TODO: translate more errors */
1434 gle = GetLastError();
1435 if (gle == ERROR_ACCESS_DENIED &&
1436 (attrs = GetFileAttributes(pnew)) != INVALID_FILE_ATTRIBUTES) {
1437 if (attrs & FILE_ATTRIBUTE_DIRECTORY) {
1438 errno = EISDIR;
1439 return -1;
1441 if ((attrs & FILE_ATTRIBUTE_READONLY) &&
1442 SetFileAttributes(pnew, attrs & ~FILE_ATTRIBUTE_READONLY)) {
1443 if (MoveFileEx(pold, pnew, MOVEFILE_REPLACE_EXISTING))
1444 return 0;
1445 gle = GetLastError();
1446 /* revert file attributes on failure */
1447 SetFileAttributes(pnew, attrs);
1450 if (tries < ARRAY_SIZE(delay) && gle == ERROR_ACCESS_DENIED) {
1452 * We assume that some other process had the source or
1453 * destination file open at the wrong moment and retry.
1454 * In order to give the other process a higher chance to
1455 * complete its operation, we give up our time slice now.
1456 * If we have to retry again, we do sleep a bit.
1458 Sleep(delay[tries]);
1459 tries++;
1460 goto repeat;
1462 if (gle == ERROR_ACCESS_DENIED &&
1463 ask_yes_no_if_possible("Rename from '%s' to '%s' failed. "
1464 "Should I try again?", pold, pnew))
1465 goto repeat;
1467 errno = EACCES;
1468 return -1;
1472 * Note that this doesn't return the actual pagesize, but
1473 * the allocation granularity. If future Windows specific git code
1474 * needs the real getpagesize function, we need to find another solution.
1476 int mingw_getpagesize(void)
1478 SYSTEM_INFO si;
1479 GetSystemInfo(&si);
1480 return si.dwAllocationGranularity;
1483 struct passwd *getpwuid(int uid)
1485 static char user_name[100];
1486 static struct passwd p;
1488 DWORD len = sizeof(user_name);
1489 if (!GetUserName(user_name, &len))
1490 return NULL;
1491 p.pw_name = user_name;
1492 p.pw_gecos = "unknown";
1493 p.pw_dir = NULL;
1494 return &p;
1497 static HANDLE timer_event;
1498 static HANDLE timer_thread;
1499 static int timer_interval;
1500 static int one_shot;
1501 static sig_handler_t timer_fn = SIG_DFL;
1503 /* The timer works like this:
1504 * The thread, ticktack(), is a trivial routine that most of the time
1505 * only waits to receive the signal to terminate. The main thread tells
1506 * the thread to terminate by setting the timer_event to the signalled
1507 * state.
1508 * But ticktack() interrupts the wait state after the timer's interval
1509 * length to call the signal handler.
1512 static unsigned __stdcall ticktack(void *dummy)
1514 while (WaitForSingleObject(timer_event, timer_interval) == WAIT_TIMEOUT) {
1515 if (timer_fn == SIG_DFL)
1516 die("Alarm");
1517 if (timer_fn != SIG_IGN)
1518 timer_fn(SIGALRM);
1519 if (one_shot)
1520 break;
1522 return 0;
1525 static int start_timer_thread(void)
1527 timer_event = CreateEvent(NULL, FALSE, FALSE, NULL);
1528 if (timer_event) {
1529 timer_thread = (HANDLE) _beginthreadex(NULL, 0, ticktack, NULL, 0, NULL);
1530 if (!timer_thread )
1531 return errno = ENOMEM,
1532 error("cannot start timer thread");
1533 } else
1534 return errno = ENOMEM,
1535 error("cannot allocate resources for timer");
1536 return 0;
1539 static void stop_timer_thread(void)
1541 if (timer_event)
1542 SetEvent(timer_event); /* tell thread to terminate */
1543 if (timer_thread) {
1544 int rc = WaitForSingleObject(timer_thread, 1000);
1545 if (rc == WAIT_TIMEOUT)
1546 error("timer thread did not terminate timely");
1547 else if (rc != WAIT_OBJECT_0)
1548 error("waiting for timer thread failed: %lu",
1549 GetLastError());
1550 CloseHandle(timer_thread);
1552 if (timer_event)
1553 CloseHandle(timer_event);
1554 timer_event = NULL;
1555 timer_thread = NULL;
1558 static inline int is_timeval_eq(const struct timeval *i1, const struct timeval *i2)
1560 return i1->tv_sec == i2->tv_sec && i1->tv_usec == i2->tv_usec;
1563 int setitimer(int type, struct itimerval *in, struct itimerval *out)
1565 static const struct timeval zero;
1566 static int atexit_done;
1568 if (out != NULL)
1569 return errno = EINVAL,
1570 error("setitimer param 3 != NULL not implemented");
1571 if (!is_timeval_eq(&in->it_interval, &zero) &&
1572 !is_timeval_eq(&in->it_interval, &in->it_value))
1573 return errno = EINVAL,
1574 error("setitimer: it_interval must be zero or eq it_value");
1576 if (timer_thread)
1577 stop_timer_thread();
1579 if (is_timeval_eq(&in->it_value, &zero) &&
1580 is_timeval_eq(&in->it_interval, &zero))
1581 return 0;
1583 timer_interval = in->it_value.tv_sec * 1000 + in->it_value.tv_usec / 1000;
1584 one_shot = is_timeval_eq(&in->it_interval, &zero);
1585 if (!atexit_done) {
1586 atexit(stop_timer_thread);
1587 atexit_done = 1;
1589 return start_timer_thread();
1592 int sigaction(int sig, struct sigaction *in, struct sigaction *out)
1594 if (sig != SIGALRM)
1595 return errno = EINVAL,
1596 error("sigaction only implemented for SIGALRM");
1597 if (out != NULL)
1598 return errno = EINVAL,
1599 error("sigaction: param 3 != NULL not implemented");
1601 timer_fn = in->sa_handler;
1602 return 0;
1605 #undef signal
1606 sig_handler_t mingw_signal(int sig, sig_handler_t handler)
1608 sig_handler_t old = timer_fn;
1609 if (sig != SIGALRM)
1610 return signal(sig, handler);
1611 timer_fn = handler;
1612 return old;
1615 static const char *make_backslash_path(const char *path)
1617 static char buf[PATH_MAX + 1];
1618 char *c;
1620 if (strlcpy(buf, path, PATH_MAX) >= PATH_MAX)
1621 die("Too long path: %.*s", 60, path);
1623 for (c = buf; *c; c++) {
1624 if (*c == '/')
1625 *c = '\\';
1627 return buf;
1630 void mingw_open_html(const char *unixpath)
1632 const char *htmlpath = make_backslash_path(unixpath);
1633 typedef HINSTANCE (WINAPI *T)(HWND, const char *,
1634 const char *, const char *, const char *, INT);
1635 T ShellExecute;
1636 HMODULE shell32;
1637 int r;
1639 shell32 = LoadLibrary("shell32.dll");
1640 if (!shell32)
1641 die("cannot load shell32.dll");
1642 ShellExecute = (T)GetProcAddress(shell32, "ShellExecuteA");
1643 if (!ShellExecute)
1644 die("cannot run browser");
1646 printf("Launching default browser to display HTML ...\n");
1647 r = (int)ShellExecute(NULL, "open", htmlpath, NULL, "\\", SW_SHOWNORMAL);
1648 FreeLibrary(shell32);
1649 /* see the MSDN documentation referring to the result codes here */
1650 if (r <= 32) {
1651 die("failed to launch browser for %.*s", MAX_PATH, unixpath);
1655 int link(const char *oldpath, const char *newpath)
1657 typedef BOOL (WINAPI *T)(const char*, const char*, LPSECURITY_ATTRIBUTES);
1658 static T create_hard_link = NULL;
1659 if (!create_hard_link) {
1660 create_hard_link = (T) GetProcAddress(
1661 GetModuleHandle("kernel32.dll"), "CreateHardLinkA");
1662 if (!create_hard_link)
1663 create_hard_link = (T)-1;
1665 if (create_hard_link == (T)-1) {
1666 errno = ENOSYS;
1667 return -1;
1669 if (!create_hard_link(newpath, oldpath, NULL)) {
1670 errno = err_win_to_posix(GetLastError());
1671 return -1;
1673 return 0;
1676 char *getpass(const char *prompt)
1678 struct strbuf buf = STRBUF_INIT;
1680 fputs(prompt, stderr);
1681 for (;;) {
1682 char c = _getch();
1683 if (c == '\r' || c == '\n')
1684 break;
1685 strbuf_addch(&buf, c);
1687 fputs("\n", stderr);
1688 return strbuf_detach(&buf, NULL);
1691 pid_t waitpid(pid_t pid, int *status, unsigned options)
1693 HANDLE h = OpenProcess(SYNCHRONIZE | PROCESS_QUERY_INFORMATION,
1694 FALSE, pid);
1695 if (!h) {
1696 errno = ECHILD;
1697 return -1;
1700 if (pid > 0 && options & WNOHANG) {
1701 if (WAIT_OBJECT_0 != WaitForSingleObject(h, 0)) {
1702 CloseHandle(h);
1703 return 0;
1705 options &= ~WNOHANG;
1708 if (options == 0) {
1709 struct pinfo_t **ppinfo;
1710 if (WaitForSingleObject(h, INFINITE) != WAIT_OBJECT_0) {
1711 CloseHandle(h);
1712 return 0;
1715 if (status)
1716 GetExitCodeProcess(h, (LPDWORD)status);
1718 EnterCriticalSection(&pinfo_cs);
1720 ppinfo = &pinfo;
1721 while (*ppinfo) {
1722 struct pinfo_t *info = *ppinfo;
1723 if (info->pid == pid) {
1724 CloseHandle(info->proc);
1725 *ppinfo = info->next;
1726 free(info);
1727 break;
1729 ppinfo = &info->next;
1732 LeaveCriticalSection(&pinfo_cs);
1734 CloseHandle(h);
1735 return pid;
1737 CloseHandle(h);
1739 errno = EINVAL;
1740 return -1;