core.hidedotfiles: hide '.git' dir by default
[git/dscho.git] / compat / mingw.c
blob671a539fbd154173a2cb4b3f7eb7bd4bcac8eb03
1 #include "../git-compat-util.h"
2 #include "win32.h"
3 #include <conio.h>
4 #include "../strbuf.h"
5 #include "../run-command.h"
6 #include "../cache.h"
8 static const int delay[] = { 0, 1, 10, 20, 40 };
9 unsigned int _CRT_fmode = _O_BINARY;
11 int err_win_to_posix(DWORD winerr)
13 int error = ENOSYS;
14 switch(winerr) {
15 case ERROR_ACCESS_DENIED: error = EACCES; break;
16 case ERROR_ACCOUNT_DISABLED: error = EACCES; break;
17 case ERROR_ACCOUNT_RESTRICTION: error = EACCES; break;
18 case ERROR_ALREADY_ASSIGNED: error = EBUSY; break;
19 case ERROR_ALREADY_EXISTS: error = EEXIST; break;
20 case ERROR_ARITHMETIC_OVERFLOW: error = ERANGE; break;
21 case ERROR_BAD_COMMAND: error = EIO; break;
22 case ERROR_BAD_DEVICE: error = ENODEV; break;
23 case ERROR_BAD_DRIVER_LEVEL: error = ENXIO; break;
24 case ERROR_BAD_EXE_FORMAT: error = ENOEXEC; break;
25 case ERROR_BAD_FORMAT: error = ENOEXEC; break;
26 case ERROR_BAD_LENGTH: error = EINVAL; break;
27 case ERROR_BAD_PATHNAME: error = ENOENT; break;
28 case ERROR_BAD_PIPE: error = EPIPE; break;
29 case ERROR_BAD_UNIT: error = ENODEV; break;
30 case ERROR_BAD_USERNAME: error = EINVAL; break;
31 case ERROR_BROKEN_PIPE: error = EPIPE; break;
32 case ERROR_BUFFER_OVERFLOW: error = ENAMETOOLONG; break;
33 case ERROR_BUSY: error = EBUSY; break;
34 case ERROR_BUSY_DRIVE: error = EBUSY; break;
35 case ERROR_CALL_NOT_IMPLEMENTED: error = ENOSYS; break;
36 case ERROR_CANNOT_MAKE: error = EACCES; break;
37 case ERROR_CANTOPEN: error = EIO; break;
38 case ERROR_CANTREAD: error = EIO; break;
39 case ERROR_CANTWRITE: error = EIO; break;
40 case ERROR_CRC: error = EIO; break;
41 case ERROR_CURRENT_DIRECTORY: error = EACCES; break;
42 case ERROR_DEVICE_IN_USE: error = EBUSY; break;
43 case ERROR_DEV_NOT_EXIST: error = ENODEV; break;
44 case ERROR_DIRECTORY: error = EINVAL; break;
45 case ERROR_DIR_NOT_EMPTY: error = ENOTEMPTY; break;
46 case ERROR_DISK_CHANGE: error = EIO; break;
47 case ERROR_DISK_FULL: error = ENOSPC; break;
48 case ERROR_DRIVE_LOCKED: error = EBUSY; break;
49 case ERROR_ENVVAR_NOT_FOUND: error = EINVAL; break;
50 case ERROR_EXE_MARKED_INVALID: error = ENOEXEC; break;
51 case ERROR_FILENAME_EXCED_RANGE: error = ENAMETOOLONG; break;
52 case ERROR_FILE_EXISTS: error = EEXIST; break;
53 case ERROR_FILE_INVALID: error = ENODEV; break;
54 case ERROR_FILE_NOT_FOUND: error = ENOENT; break;
55 case ERROR_GEN_FAILURE: error = EIO; break;
56 case ERROR_HANDLE_DISK_FULL: error = ENOSPC; break;
57 case ERROR_INSUFFICIENT_BUFFER: error = ENOMEM; break;
58 case ERROR_INVALID_ACCESS: error = EACCES; break;
59 case ERROR_INVALID_ADDRESS: error = EFAULT; break;
60 case ERROR_INVALID_BLOCK: error = EFAULT; break;
61 case ERROR_INVALID_DATA: error = EINVAL; break;
62 case ERROR_INVALID_DRIVE: error = ENODEV; break;
63 case ERROR_INVALID_EXE_SIGNATURE: error = ENOEXEC; break;
64 case ERROR_INVALID_FLAGS: error = EINVAL; break;
65 case ERROR_INVALID_FUNCTION: error = ENOSYS; break;
66 case ERROR_INVALID_HANDLE: error = EBADF; break;
67 case ERROR_INVALID_LOGON_HOURS: error = EACCES; break;
68 case ERROR_INVALID_NAME: error = EINVAL; break;
69 case ERROR_INVALID_OWNER: error = EINVAL; break;
70 case ERROR_INVALID_PARAMETER: error = EINVAL; break;
71 case ERROR_INVALID_PASSWORD: error = EPERM; break;
72 case ERROR_INVALID_PRIMARY_GROUP: error = EINVAL; break;
73 case ERROR_INVALID_SIGNAL_NUMBER: error = EINVAL; break;
74 case ERROR_INVALID_TARGET_HANDLE: error = EIO; break;
75 case ERROR_INVALID_WORKSTATION: error = EACCES; break;
76 case ERROR_IO_DEVICE: error = EIO; break;
77 case ERROR_IO_INCOMPLETE: error = EINTR; break;
78 case ERROR_LOCKED: error = EBUSY; break;
79 case ERROR_LOCK_VIOLATION: error = EACCES; break;
80 case ERROR_LOGON_FAILURE: error = EACCES; break;
81 case ERROR_MAPPED_ALIGNMENT: error = EINVAL; break;
82 case ERROR_META_EXPANSION_TOO_LONG: error = E2BIG; break;
83 case ERROR_MORE_DATA: error = EPIPE; break;
84 case ERROR_NEGATIVE_SEEK: error = ESPIPE; break;
85 case ERROR_NOACCESS: error = EFAULT; break;
86 case ERROR_NONE_MAPPED: error = EINVAL; break;
87 case ERROR_NOT_ENOUGH_MEMORY: error = ENOMEM; break;
88 case ERROR_NOT_READY: error = EAGAIN; break;
89 case ERROR_NOT_SAME_DEVICE: error = EXDEV; break;
90 case ERROR_NO_DATA: error = EPIPE; break;
91 case ERROR_NO_MORE_SEARCH_HANDLES: error = EIO; break;
92 case ERROR_NO_PROC_SLOTS: error = EAGAIN; break;
93 case ERROR_NO_SUCH_PRIVILEGE: error = EACCES; break;
94 case ERROR_OPEN_FAILED: error = EIO; break;
95 case ERROR_OPEN_FILES: error = EBUSY; break;
96 case ERROR_OPERATION_ABORTED: error = EINTR; break;
97 case ERROR_OUTOFMEMORY: error = ENOMEM; break;
98 case ERROR_PASSWORD_EXPIRED: error = EACCES; break;
99 case ERROR_PATH_BUSY: error = EBUSY; break;
100 case ERROR_PATH_NOT_FOUND: error = ENOENT; break;
101 case ERROR_PIPE_BUSY: error = EBUSY; break;
102 case ERROR_PIPE_CONNECTED: error = EPIPE; break;
103 case ERROR_PIPE_LISTENING: error = EPIPE; break;
104 case ERROR_PIPE_NOT_CONNECTED: error = EPIPE; break;
105 case ERROR_PRIVILEGE_NOT_HELD: error = EACCES; break;
106 case ERROR_READ_FAULT: error = EIO; break;
107 case ERROR_SEEK: error = EIO; break;
108 case ERROR_SEEK_ON_DEVICE: error = ESPIPE; break;
109 case ERROR_SHARING_BUFFER_EXCEEDED: error = ENFILE; break;
110 case ERROR_SHARING_VIOLATION: error = EACCES; break;
111 case ERROR_STACK_OVERFLOW: error = ENOMEM; break;
112 case ERROR_SWAPERROR: error = ENOENT; break;
113 case ERROR_TOO_MANY_MODULES: error = EMFILE; break;
114 case ERROR_TOO_MANY_OPEN_FILES: error = EMFILE; break;
115 case ERROR_UNRECOGNIZED_MEDIA: error = ENXIO; break;
116 case ERROR_UNRECOGNIZED_VOLUME: error = ENODEV; break;
117 case ERROR_WAIT_NO_CHILDREN: error = ECHILD; break;
118 case ERROR_WRITE_FAULT: error = EIO; break;
119 case ERROR_WRITE_PROTECT: error = EROFS; break;
121 return error;
124 static inline int is_file_in_use_error(DWORD errcode)
126 switch (errcode) {
127 case ERROR_SHARING_VIOLATION:
128 case ERROR_ACCESS_DENIED:
129 return 1;
132 return 0;
135 static int read_yes_no_answer(void)
137 char answer[1024];
139 if (fgets(answer, sizeof(answer), stdin)) {
140 size_t answer_len = strlen(answer);
141 int got_full_line = 0, c;
143 /* remove the newline */
144 if (answer_len >= 2 && answer[answer_len-2] == '\r') {
145 answer[answer_len-2] = '\0';
146 got_full_line = 1;
147 } else if (answer_len >= 1 && answer[answer_len-1] == '\n') {
148 answer[answer_len-1] = '\0';
149 got_full_line = 1;
151 /* flush the buffer in case we did not get the full line */
152 if (!got_full_line)
153 while ((c = getchar()) != EOF && c != '\n')
155 } else
156 /* we could not read, return the
157 * default answer which is no */
158 return 0;
160 if (tolower(answer[0]) == 'y' && !answer[1])
161 return 1;
162 if (!strncasecmp(answer, "yes", sizeof(answer)))
163 return 1;
164 if (tolower(answer[0]) == 'n' && !answer[1])
165 return 0;
166 if (!strncasecmp(answer, "no", sizeof(answer)))
167 return 0;
169 /* did not find an answer we understand */
170 return -1;
173 static int ask_yes_no_if_possible(const char *format, ...)
175 char question[4096];
176 const char *retry_hook[] = { NULL, NULL, NULL };
177 va_list args;
179 va_start(args, format);
180 vsnprintf(question, sizeof(question), format, args);
181 va_end(args);
183 if ((retry_hook[0] = mingw_getenv("GIT_ASK_YESNO"))) {
184 retry_hook[1] = question;
185 return !run_command_v_opt(retry_hook, 0);
188 if (!isatty(_fileno(stdin)) || !isatty(_fileno(stderr)))
189 return 0;
191 while (1) {
192 int answer;
193 fprintf(stderr, "%s (y/n) ", question);
195 if ((answer = read_yes_no_answer()) >= 0)
196 return answer;
198 fprintf(stderr, "Sorry, I did not understand your answer. "
199 "Please type 'y' or 'n'\n");
203 #undef unlink
204 int mingw_unlink(const char *pathname)
206 int ret, tries = 0;
208 /* read-only files cannot be removed */
209 chmod(pathname, 0666);
210 while ((ret = unlink(pathname)) == -1 && tries < ARRAY_SIZE(delay)) {
211 if (!is_file_in_use_error(GetLastError()))
212 break;
214 * We assume that some other process had the source or
215 * destination file open at the wrong moment and retry.
216 * In order to give the other process a higher chance to
217 * complete its operation, we give up our time slice now.
218 * If we have to retry again, we do sleep a bit.
220 Sleep(delay[tries]);
221 tries++;
223 while (ret == -1 && is_file_in_use_error(GetLastError()) &&
224 ask_yes_no_if_possible("Unlink of file '%s' failed. "
225 "Should I try again?", pathname))
226 ret = unlink(pathname);
227 return ret;
230 static int is_dir_empty(const char *path)
232 struct strbuf buf = STRBUF_INIT;
233 WIN32_FIND_DATAA findbuf;
234 HANDLE handle;
236 strbuf_addf(&buf, "%s\\*", path);
237 handle = FindFirstFileA(buf.buf, &findbuf);
238 if (handle == INVALID_HANDLE_VALUE) {
239 strbuf_release(&buf);
240 return GetLastError() == ERROR_NO_MORE_FILES;
243 while (!strcmp(findbuf.cFileName, ".") ||
244 !strcmp(findbuf.cFileName, ".."))
245 if (!FindNextFile(handle, &findbuf)) {
246 strbuf_release(&buf);
247 return GetLastError() == ERROR_NO_MORE_FILES;
249 FindClose(handle);
250 strbuf_release(&buf);
251 return 0;
254 #undef rmdir
255 int mingw_rmdir(const char *pathname)
257 int ret, tries = 0;
259 while ((ret = rmdir(pathname)) == -1 && tries < ARRAY_SIZE(delay)) {
260 if (!is_file_in_use_error(GetLastError()))
261 break;
262 if (!is_dir_empty(pathname)) {
263 errno = ENOTEMPTY;
264 break;
267 * We assume that some other process had the source or
268 * destination file open at the wrong moment and retry.
269 * In order to give the other process a higher chance to
270 * complete its operation, we give up our time slice now.
271 * If we have to retry again, we do sleep a bit.
273 Sleep(delay[tries]);
274 tries++;
276 while (ret == -1 && is_file_in_use_error(GetLastError()) &&
277 ask_yes_no_if_possible("Deletion of directory '%s' failed. "
278 "Should I try again?", pathname))
279 ret = rmdir(pathname);
280 return ret;
283 static int make_hidden(const char *path)
285 DWORD attribs = GetFileAttributes(path);
286 if (SetFileAttributes(path, FILE_ATTRIBUTE_HIDDEN | attribs))
287 return 0;
288 errno = err_win_to_posix(GetLastError());
289 return -1;
292 void mingw_mark_as_git_dir(const char *dir)
294 if (hide_dotfiles != HIDE_DOTFILES_FALSE && make_hidden(dir))
295 warning("Failed to make '%s' hidden", dir);
298 #undef mkdir
299 int mingw_mkdir(const char *path, int mode)
301 int ret = mkdir(path);
302 if (!ret && hide_dotfiles == HIDE_DOTFILES_TRUE) {
304 * In Windows a file or dir starting with a dot is not
305 * automatically hidden. So lets mark it as hidden when
306 * such a directory is created.
308 const char *start = basename((char*)path);
309 if (*start == '.')
310 return make_hidden(path);
312 return ret;
315 #undef open
316 int mingw_open (const char *filename, int oflags, ...)
318 va_list args;
319 unsigned mode;
320 int fd;
322 va_start(args, oflags);
323 mode = va_arg(args, int);
324 va_end(args);
326 if (filename && !strcmp(filename, "/dev/null"))
327 filename = "nul";
329 fd = open(filename, oflags, mode);
331 if (fd < 0 && (oflags & O_CREAT) && errno == EACCES) {
332 DWORD attrs = GetFileAttributes(filename);
333 if (attrs != INVALID_FILE_ATTRIBUTES && (attrs & FILE_ATTRIBUTE_DIRECTORY))
334 errno = EISDIR;
336 if ((oflags & O_CREAT) && fd >= 0 &&
337 hide_dotfiles == HIDE_DOTFILES_TRUE) {
339 * In Windows a file or dir starting with a dot is not
340 * automatically hidden. So lets mark it as hidden when
341 * such a file is created.
343 const char *start = basename((char*)filename);
344 if (*start == '.' && make_hidden(filename))
345 warning("Could not mark '%s' as hidden.", filename);
347 return fd;
350 #undef write
351 ssize_t mingw_write(int fd, const void *buf, size_t count)
354 * While write() calls to a file on a local disk are translated
355 * into WriteFile() calls with a maximum size of 64KB on Windows
356 * XP and 256KB on Vista, no such cap is placed on writes to
357 * files over the network on Windows XP. Unfortunately, there
358 * seems to be a limit of 32MB-28KB on X64 and 64MB-32KB on x86;
359 * bigger writes fail on Windows XP.
360 * So we cap to a nice 31MB here to avoid write failures over
361 * the net without changing the number of WriteFile() calls in
362 * the local case.
364 return write(fd, buf, min(count, 31 * 1024 * 1024));
367 #undef fopen
368 FILE *mingw_fopen (const char *filename, const char *otype)
370 int hide = 0;
371 FILE *file;
372 if (hide_dotfiles == HIDE_DOTFILES_TRUE &&
373 basename((char*)filename)[0] == '.')
374 hide = access(filename, F_OK);
375 if (filename && !strcmp(filename, "/dev/null"))
376 filename = "nul";
377 file = fopen(filename, otype);
378 if (file && hide && make_hidden(filename))
379 warning("Could not mark '%s' as hidden.", filename);
380 return file;
383 #undef freopen
384 FILE *mingw_freopen (const char *filename, const char *otype, FILE *stream)
386 int hide = 0;
387 FILE *file;
388 if (hide_dotfiles == HIDE_DOTFILES_TRUE &&
389 basename((char*)filename)[0] == '.')
390 hide = access(filename, F_OK);
391 if (filename && !strcmp(filename, "/dev/null"))
392 filename = "nul";
393 file = freopen(filename, otype, stream);
394 if (file && hide && make_hidden(filename))
395 warning("Could not mark '%s' as hidden.", filename);
396 return file;
400 * The unit of FILETIME is 100-nanoseconds since January 1, 1601, UTC.
401 * Returns the 100-nanoseconds ("hekto nanoseconds") since the epoch.
403 static inline long long filetime_to_hnsec(const FILETIME *ft)
405 long long winTime = ((long long)ft->dwHighDateTime << 32) + ft->dwLowDateTime;
406 /* Windows to Unix Epoch conversion */
407 return winTime - 116444736000000000LL;
410 static inline time_t filetime_to_time_t(const FILETIME *ft)
412 return (time_t)(filetime_to_hnsec(ft) / 10000000);
415 /* We keep the do_lstat code in a separate function to avoid recursion.
416 * When a path ends with a slash, the stat will fail with ENOENT. In
417 * this case, we strip the trailing slashes and stat again.
419 * If follow is true then act like stat() and report on the link
420 * target. Otherwise report on the link itself.
422 static int do_lstat(int follow, const char *file_name, struct stat *buf)
424 int err;
425 WIN32_FILE_ATTRIBUTE_DATA fdata;
427 if (!(err = get_file_attr(file_name, &fdata))) {
428 buf->st_ino = 0;
429 buf->st_gid = 0;
430 buf->st_uid = 0;
431 buf->st_nlink = 1;
432 buf->st_mode = file_attr_to_st_mode(fdata.dwFileAttributes);
433 buf->st_size = fdata.nFileSizeLow |
434 (((off_t)fdata.nFileSizeHigh)<<32);
435 buf->st_dev = buf->st_rdev = 0; /* not used by Git */
436 buf->st_atime = filetime_to_time_t(&(fdata.ftLastAccessTime));
437 buf->st_mtime = filetime_to_time_t(&(fdata.ftLastWriteTime));
438 buf->st_ctime = filetime_to_time_t(&(fdata.ftCreationTime));
439 if (fdata.dwFileAttributes & FILE_ATTRIBUTE_REPARSE_POINT) {
440 WIN32_FIND_DATAA findbuf;
441 HANDLE handle = FindFirstFileA(file_name, &findbuf);
442 if (handle != INVALID_HANDLE_VALUE) {
443 if ((findbuf.dwFileAttributes & FILE_ATTRIBUTE_REPARSE_POINT) &&
444 (findbuf.dwReserved0 == IO_REPARSE_TAG_SYMLINK)) {
445 if (follow) {
446 char buffer[MAXIMUM_REPARSE_DATA_BUFFER_SIZE];
447 buf->st_size = readlink(file_name, buffer, MAXIMUM_REPARSE_DATA_BUFFER_SIZE);
448 } else {
449 buf->st_mode = S_IFLNK;
451 buf->st_mode |= S_IREAD;
452 if (!(findbuf.dwFileAttributes & FILE_ATTRIBUTE_READONLY))
453 buf->st_mode |= S_IWRITE;
455 FindClose(handle);
458 return 0;
460 errno = err;
461 return -1;
464 /* We provide our own lstat/fstat functions, since the provided
465 * lstat/fstat functions are so slow. These stat functions are
466 * tailored for Git's usage (read: fast), and are not meant to be
467 * complete. Note that Git stat()s are redirected to mingw_lstat()
468 * too, since Windows doesn't really handle symlinks that well.
470 static int do_stat_internal(int follow, const char *file_name, struct stat *buf)
472 int namelen;
473 static char alt_name[PATH_MAX];
475 if (!do_lstat(follow, file_name, buf))
476 return 0;
478 /* if file_name ended in a '/', Windows returned ENOENT;
479 * try again without trailing slashes
481 if (errno != ENOENT)
482 return -1;
484 namelen = strlen(file_name);
485 if (namelen && file_name[namelen-1] != '/')
486 return -1;
487 while (namelen && file_name[namelen-1] == '/')
488 --namelen;
489 if (!namelen || namelen >= PATH_MAX)
490 return -1;
492 memcpy(alt_name, file_name, namelen);
493 alt_name[namelen] = 0;
494 return do_lstat(follow, alt_name, buf);
497 int mingw_lstat(const char *file_name, struct stat *buf)
499 return do_stat_internal(0, file_name, buf);
501 int mingw_stat(const char *file_name, struct stat *buf)
503 return do_stat_internal(1, file_name, buf);
506 #undef fstat
507 int mingw_fstat(int fd, struct stat *buf)
509 HANDLE fh = (HANDLE)_get_osfhandle(fd);
510 BY_HANDLE_FILE_INFORMATION fdata;
512 if (fh == INVALID_HANDLE_VALUE) {
513 errno = EBADF;
514 return -1;
516 /* direct non-file handles to MS's fstat() */
517 if (GetFileType(fh) != FILE_TYPE_DISK)
518 return _fstati64(fd, buf);
520 if (GetFileInformationByHandle(fh, &fdata)) {
521 buf->st_ino = 0;
522 buf->st_gid = 0;
523 buf->st_uid = 0;
524 buf->st_nlink = 1;
525 buf->st_mode = file_attr_to_st_mode(fdata.dwFileAttributes);
526 buf->st_size = fdata.nFileSizeLow |
527 (((off_t)fdata.nFileSizeHigh)<<32);
528 buf->st_dev = buf->st_rdev = 0; /* not used by Git */
529 buf->st_atime = filetime_to_time_t(&(fdata.ftLastAccessTime));
530 buf->st_mtime = filetime_to_time_t(&(fdata.ftLastWriteTime));
531 buf->st_ctime = filetime_to_time_t(&(fdata.ftCreationTime));
532 return 0;
534 errno = EBADF;
535 return -1;
538 static inline void time_t_to_filetime(time_t t, FILETIME *ft)
540 long long winTime = t * 10000000LL + 116444736000000000LL;
541 ft->dwLowDateTime = winTime;
542 ft->dwHighDateTime = winTime >> 32;
545 int mingw_utime (const char *file_name, const struct utimbuf *times)
547 FILETIME mft, aft;
548 int fh, rc;
550 /* must have write permission */
551 DWORD attrs = GetFileAttributes(file_name);
552 if (attrs != INVALID_FILE_ATTRIBUTES &&
553 (attrs & FILE_ATTRIBUTE_READONLY)) {
554 /* ignore errors here; open() will report them */
555 SetFileAttributes(file_name, attrs & ~FILE_ATTRIBUTE_READONLY);
558 if ((fh = open(file_name, O_RDWR | O_BINARY)) < 0) {
559 rc = -1;
560 goto revert_attrs;
563 if (times) {
564 time_t_to_filetime(times->modtime, &mft);
565 time_t_to_filetime(times->actime, &aft);
566 } else {
567 GetSystemTimeAsFileTime(&mft);
568 aft = mft;
570 if (!SetFileTime((HANDLE)_get_osfhandle(fh), NULL, &aft, &mft)) {
571 errno = EINVAL;
572 rc = -1;
573 } else
574 rc = 0;
575 close(fh);
577 revert_attrs:
578 if (attrs != INVALID_FILE_ATTRIBUTES &&
579 (attrs & FILE_ATTRIBUTE_READONLY)) {
580 /* ignore errors again */
581 SetFileAttributes(file_name, attrs);
583 return rc;
586 unsigned int sleep (unsigned int seconds)
588 Sleep(seconds*1000);
589 return 0;
592 int mkstemp(char *template)
594 char *filename = mktemp(template);
595 if (filename == NULL)
596 return -1;
597 return open(filename, O_RDWR | O_CREAT, 0600);
600 int gettimeofday(struct timeval *tv, void *tz)
602 FILETIME ft;
603 long long hnsec;
605 GetSystemTimeAsFileTime(&ft);
606 hnsec = filetime_to_hnsec(&ft);
607 tv->tv_sec = hnsec / 10000000;
608 tv->tv_usec = (hnsec % 10000000) / 10;
609 return 0;
612 int pipe(int filedes[2])
614 HANDLE h[2];
616 /* this creates non-inheritable handles */
617 if (!CreatePipe(&h[0], &h[1], NULL, 8192)) {
618 errno = err_win_to_posix(GetLastError());
619 return -1;
621 filedes[0] = _open_osfhandle((int)h[0], O_NOINHERIT);
622 if (filedes[0] < 0) {
623 CloseHandle(h[0]);
624 CloseHandle(h[1]);
625 return -1;
627 filedes[1] = _open_osfhandle((int)h[1], O_NOINHERIT);
628 if (filedes[0] < 0) {
629 close(filedes[0]);
630 CloseHandle(h[1]);
631 return -1;
633 return 0;
636 struct tm *gmtime_r(const time_t *timep, struct tm *result)
638 /* gmtime() in MSVCRT.DLL is thread-safe, but not reentrant */
639 memcpy(result, gmtime(timep), sizeof(struct tm));
640 return result;
643 struct tm *localtime_r(const time_t *timep, struct tm *result)
645 /* localtime() in MSVCRT.DLL is thread-safe, but not reentrant */
646 memcpy(result, localtime(timep), sizeof(struct tm));
647 return result;
650 #undef getcwd
651 char *mingw_getcwd(char *pointer, int len)
653 int i;
654 char *ret = getcwd(pointer, len);
655 if (!ret)
656 return ret;
657 for (i = 0; pointer[i]; i++)
658 if (pointer[i] == '\\')
659 pointer[i] = '/';
660 return ret;
664 * See http://msdn2.microsoft.com/en-us/library/17w5ykft(vs.71).aspx
665 * (Parsing C++ Command-Line Arguments)
667 static const char *quote_arg(const char *arg)
669 /* count chars to quote */
670 int len = 0, n = 0;
671 int force_quotes = 0;
672 char *q, *d;
673 const char *p = arg;
674 if (!*p) force_quotes = 1;
675 while (*p) {
676 if (isspace(*p) || *p == '*' || *p == '?' || *p == '{' || *p == '\'')
677 force_quotes = 1;
678 else if (*p == '"')
679 n++;
680 else if (*p == '\\') {
681 int count = 0;
682 while (*p == '\\') {
683 count++;
684 p++;
685 len++;
687 if (*p == '"')
688 n += count*2 + 1;
689 continue;
691 len++;
692 p++;
694 if (!force_quotes && n == 0)
695 return arg;
697 /* insert \ where necessary */
698 d = q = xmalloc(len+n+3);
699 *d++ = '"';
700 while (*arg) {
701 if (*arg == '"')
702 *d++ = '\\';
703 else if (*arg == '\\') {
704 int count = 0;
705 while (*arg == '\\') {
706 count++;
707 *d++ = *arg++;
709 if (*arg == '"') {
710 while (count-- > 0)
711 *d++ = '\\';
712 *d++ = '\\';
715 *d++ = *arg++;
717 *d++ = '"';
718 *d++ = 0;
719 return q;
722 static const char *parse_interpreter(const char *cmd)
724 static char buf[100];
725 char *p, *opt;
726 int n, fd;
728 /* don't even try a .exe */
729 n = strlen(cmd);
730 if (n >= 4 && !strcasecmp(cmd+n-4, ".exe"))
731 return NULL;
733 fd = open(cmd, O_RDONLY);
734 if (fd < 0)
735 return NULL;
736 n = read(fd, buf, sizeof(buf)-1);
737 close(fd);
738 if (n < 4) /* at least '#!/x' and not error */
739 return NULL;
741 if (buf[0] != '#' || buf[1] != '!')
742 return NULL;
743 buf[n] = '\0';
744 p = buf + strcspn(buf, "\r\n");
745 if (!*p)
746 return NULL;
748 *p = '\0';
749 if (!(p = strrchr(buf+2, '/')) && !(p = strrchr(buf+2, '\\')))
750 return NULL;
751 /* strip options */
752 if ((opt = strchr(p+1, ' ')))
753 *opt = '\0';
754 return p+1;
758 * Splits the PATH into parts.
760 static char **get_path_split(void)
762 char *p, **path, *envpath = mingw_getenv("PATH");
763 int i, n = 0;
765 if (!envpath || !*envpath)
766 return NULL;
768 envpath = xstrdup(envpath);
769 p = envpath;
770 while (p) {
771 char *dir = p;
772 p = strchr(p, ';');
773 if (p) *p++ = '\0';
774 if (*dir) { /* not earlier, catches series of ; */
775 ++n;
778 if (!n)
779 return NULL;
781 path = xmalloc((n+1)*sizeof(char *));
782 p = envpath;
783 i = 0;
784 do {
785 if (*p)
786 path[i++] = xstrdup(p);
787 p = p+strlen(p)+1;
788 } while (i < n);
789 path[i] = NULL;
791 free(envpath);
793 return path;
796 static void free_path_split(char **path)
798 char **p = path;
800 if (!path)
801 return;
803 while (*p)
804 free(*p++);
805 free(path);
809 * exe_only means that we only want to detect .exe files, but not scripts
810 * (which do not have an extension)
812 static char *lookup_prog(const char *dir, const char *cmd, int isexe, int exe_only)
814 char path[MAX_PATH];
815 snprintf(path, sizeof(path), "%s/%s.exe", dir, cmd);
817 if (!isexe && access(path, F_OK) == 0)
818 return xstrdup(path);
819 path[strlen(path)-4] = '\0';
820 if ((!exe_only || isexe) && access(path, F_OK) == 0)
821 if (!(GetFileAttributes(path) & FILE_ATTRIBUTE_DIRECTORY))
822 return xstrdup(path);
823 return NULL;
827 * Determines the absolute path of cmd using the split path in path.
828 * If cmd contains a slash or backslash, no lookup is performed.
830 static char *path_lookup(const char *cmd, char **path, int exe_only)
832 char *prog = NULL;
833 int len = strlen(cmd);
834 int isexe = len >= 4 && !strcasecmp(cmd+len-4, ".exe");
836 if (strchr(cmd, '/') || strchr(cmd, '\\'))
837 prog = xstrdup(cmd);
839 while (!prog && *path)
840 prog = lookup_prog(*path++, cmd, isexe, exe_only);
842 return prog;
845 static int env_compare(const void *a, const void *b)
847 char *const *ea = a;
848 char *const *eb = b;
849 return strcasecmp(*ea, *eb);
852 struct pinfo_t {
853 struct pinfo_t *next;
854 pid_t pid;
855 HANDLE proc;
856 } pinfo_t;
857 struct pinfo_t *pinfo = NULL;
858 CRITICAL_SECTION pinfo_cs;
860 static pid_t mingw_spawnve_fd(const char *cmd, const char **argv, char **env,
861 const char *dir,
862 int prepend_cmd, int fhin, int fhout, int fherr)
864 STARTUPINFO si;
865 PROCESS_INFORMATION pi;
866 struct strbuf envblk, args;
867 unsigned flags;
868 BOOL ret;
870 /* Determine whether or not we are associated to a console */
871 HANDLE cons = CreateFile("CONOUT$", GENERIC_WRITE,
872 FILE_SHARE_WRITE, NULL, OPEN_EXISTING,
873 FILE_ATTRIBUTE_NORMAL, NULL);
874 if (cons == INVALID_HANDLE_VALUE) {
875 /* There is no console associated with this process.
876 * Since the child is a console process, Windows
877 * would normally create a console window. But
878 * since we'll be redirecting std streams, we do
879 * not need the console.
880 * It is necessary to use DETACHED_PROCESS
881 * instead of CREATE_NO_WINDOW to make ssh
882 * recognize that it has no console.
884 flags = DETACHED_PROCESS;
885 } else {
886 /* There is already a console. If we specified
887 * DETACHED_PROCESS here, too, Windows would
888 * disassociate the child from the console.
889 * The same is true for CREATE_NO_WINDOW.
890 * Go figure!
892 flags = 0;
893 CloseHandle(cons);
895 memset(&si, 0, sizeof(si));
896 si.cb = sizeof(si);
897 si.dwFlags = STARTF_USESTDHANDLES;
898 si.hStdInput = (HANDLE) _get_osfhandle(fhin);
899 si.hStdOutput = (HANDLE) _get_osfhandle(fhout);
900 si.hStdError = (HANDLE) _get_osfhandle(fherr);
902 /* concatenate argv, quoting args as we go */
903 strbuf_init(&args, 0);
904 if (prepend_cmd) {
905 char *quoted = (char *)quote_arg(cmd);
906 strbuf_addstr(&args, quoted);
907 if (quoted != cmd)
908 free(quoted);
910 for (; *argv; argv++) {
911 char *quoted = (char *)quote_arg(*argv);
912 if (*args.buf)
913 strbuf_addch(&args, ' ');
914 strbuf_addstr(&args, quoted);
915 if (quoted != *argv)
916 free(quoted);
919 if (env) {
920 int count = 0;
921 char **e, **sorted_env;
923 for (e = env; *e; e++)
924 count++;
926 /* environment must be sorted */
927 sorted_env = xmalloc(sizeof(*sorted_env) * (count + 1));
928 memcpy(sorted_env, env, sizeof(*sorted_env) * (count + 1));
929 qsort(sorted_env, count, sizeof(*sorted_env), env_compare);
931 strbuf_init(&envblk, 0);
932 for (e = sorted_env; *e; e++) {
933 strbuf_addstr(&envblk, *e);
934 strbuf_addch(&envblk, '\0');
936 free(sorted_env);
939 memset(&pi, 0, sizeof(pi));
940 ret = CreateProcess(cmd, args.buf, NULL, NULL, TRUE, flags,
941 env ? envblk.buf : NULL, dir, &si, &pi);
943 if (env)
944 strbuf_release(&envblk);
945 strbuf_release(&args);
947 if (!ret) {
948 errno = ENOENT;
949 return -1;
951 CloseHandle(pi.hThread);
954 * The process ID is the human-readable identifier of the process
955 * that we want to present in log and error messages. The handle
956 * is not useful for this purpose. But we cannot close it, either,
957 * because it is not possible to turn a process ID into a process
958 * handle after the process terminated.
959 * Keep the handle in a list for waitpid.
961 EnterCriticalSection(&pinfo_cs);
963 struct pinfo_t *info = xmalloc(sizeof(struct pinfo_t));
964 info->pid = pi.dwProcessId;
965 info->proc = pi.hProcess;
966 info->next = pinfo;
967 pinfo = info;
969 LeaveCriticalSection(&pinfo_cs);
971 return (pid_t)pi.dwProcessId;
974 static pid_t mingw_spawnve(const char *cmd, const char **argv, char **env,
975 int prepend_cmd)
977 return mingw_spawnve_fd(cmd, argv, env, NULL, prepend_cmd, 0, 1, 2);
980 pid_t mingw_spawnvpe(const char *cmd, const char **argv, char **env,
981 const char *dir,
982 int fhin, int fhout, int fherr)
984 pid_t pid;
985 char **path = get_path_split();
986 char *prog = path_lookup(cmd, path, 0);
988 if (!prog) {
989 errno = ENOENT;
990 pid = -1;
992 else {
993 const char *interpr = parse_interpreter(prog);
995 if (interpr) {
996 const char *argv0 = argv[0];
997 char *iprog = path_lookup(interpr, path, 1);
998 argv[0] = prog;
999 if (!iprog) {
1000 errno = ENOENT;
1001 pid = -1;
1003 else {
1004 pid = mingw_spawnve_fd(iprog, argv, env, dir, 1,
1005 fhin, fhout, fherr);
1006 free(iprog);
1008 argv[0] = argv0;
1010 else
1011 pid = mingw_spawnve_fd(prog, argv, env, dir, 0,
1012 fhin, fhout, fherr);
1013 free(prog);
1015 free_path_split(path);
1016 return pid;
1019 static int try_shell_exec(const char *cmd, char *const *argv, char **env)
1021 const char *interpr = parse_interpreter(cmd);
1022 char **path;
1023 char *prog;
1024 int pid = 0;
1026 if (!interpr)
1027 return 0;
1028 path = get_path_split();
1029 prog = path_lookup(interpr, path, 1);
1030 if (prog) {
1031 int argc = 0;
1032 const char **argv2;
1033 while (argv[argc]) argc++;
1034 argv2 = xmalloc(sizeof(*argv) * (argc+1));
1035 argv2[0] = (char *)cmd; /* full path to the script file */
1036 memcpy(&argv2[1], &argv[1], sizeof(*argv) * argc);
1037 pid = mingw_spawnve(prog, argv2, env, 1);
1038 if (pid >= 0) {
1039 int status;
1040 if (waitpid(pid, &status, 0) < 0)
1041 status = 255;
1042 exit(status);
1044 pid = 1; /* indicate that we tried but failed */
1045 free(prog);
1046 free(argv2);
1048 free_path_split(path);
1049 return pid;
1052 static void mingw_execve(const char *cmd, char *const *argv, char *const *env)
1054 /* check if git_command is a shell script */
1055 if (!try_shell_exec(cmd, argv, (char **)env)) {
1056 int pid, status;
1058 pid = mingw_spawnve(cmd, (const char **)argv, (char **)env, 0);
1059 if (pid < 0)
1060 return;
1061 if (waitpid(pid, &status, 0) < 0)
1062 status = 255;
1063 exit(status);
1067 int mingw_execvp(const char *cmd, char *const *argv)
1069 char **path = get_path_split();
1070 char *prog = path_lookup(cmd, path, 0);
1072 if (prog) {
1073 mingw_execve(prog, argv, environ);
1074 free(prog);
1075 } else
1076 errno = ENOENT;
1078 free_path_split(path);
1079 return -1;
1082 int mingw_execv(const char *cmd, char *const *argv)
1084 mingw_execve(cmd, argv, environ);
1085 return -1;
1088 int mingw_kill(pid_t pid, int sig)
1090 if (pid > 0 && sig == SIGTERM) {
1091 HANDLE h = OpenProcess(PROCESS_TERMINATE, FALSE, pid);
1093 if (TerminateProcess(h, -1)) {
1094 CloseHandle(h);
1095 return 0;
1098 errno = err_win_to_posix(GetLastError());
1099 CloseHandle(h);
1100 return -1;
1103 errno = EINVAL;
1104 return -1;
1107 static char **copy_environ(void)
1109 char **env;
1110 int i = 0;
1111 while (environ[i])
1112 i++;
1113 env = xmalloc((i+1)*sizeof(*env));
1114 for (i = 0; environ[i]; i++)
1115 env[i] = xstrdup(environ[i]);
1116 env[i] = NULL;
1117 return env;
1120 void free_environ(char **env)
1122 int i;
1123 for (i = 0; env[i]; i++)
1124 free(env[i]);
1125 free(env);
1128 static int lookup_env(char **env, const char *name, size_t nmln)
1130 int i;
1132 for (i = 0; env[i]; i++) {
1133 if (0 == strncmp(env[i], name, nmln)
1134 && '=' == env[i][nmln])
1135 /* matches */
1136 return i;
1138 return -1;
1142 * If name contains '=', then sets the variable, otherwise it unsets it
1144 static char **env_setenv(char **env, const char *name)
1146 char *eq = strchrnul(name, '=');
1147 int i = lookup_env(env, name, eq-name);
1149 if (i < 0) {
1150 if (*eq) {
1151 for (i = 0; env[i]; i++)
1153 env = xrealloc(env, (i+2)*sizeof(*env));
1154 env[i] = xstrdup(name);
1155 env[i+1] = NULL;
1158 else {
1159 free(env[i]);
1160 if (*eq)
1161 env[i] = xstrdup(name);
1162 else
1163 for (; env[i]; i++)
1164 env[i] = env[i+1];
1166 return env;
1170 * Copies global environ and adjusts variables as specified by vars.
1172 char **make_augmented_environ(const char *const *vars)
1174 char **env = copy_environ();
1176 while (*vars)
1177 env = env_setenv(env, *vars++);
1178 return env;
1181 #undef getenv
1184 * The system's getenv looks up the name in a case-insensitive manner.
1185 * This version tries a case-sensitive lookup and falls back to
1186 * case-insensitive if nothing was found. This is necessary because,
1187 * as a prominent example, CMD sets 'Path', but not 'PATH'.
1188 * Warning: not thread-safe.
1190 static char *getenv_cs(const char *name)
1192 size_t len = strlen(name);
1193 int i = lookup_env(environ, name, len);
1194 if (i >= 0)
1195 return environ[i] + len + 1; /* skip past name and '=' */
1196 return getenv(name);
1199 char *mingw_getenv(const char *name)
1201 char *result = getenv_cs(name);
1202 if (!result && !strcmp(name, "TMPDIR")) {
1203 /* on Windows it is TMP and TEMP */
1204 result = getenv_cs("TMP");
1205 if (!result)
1206 result = getenv_cs("TEMP");
1208 return result;
1212 * Note, this isn't a complete replacement for getaddrinfo. It assumes
1213 * that service contains a numerical port, or that it is null. It
1214 * does a simple search using gethostbyname, and returns one IPv4 host
1215 * if one was found.
1217 static int WSAAPI getaddrinfo_stub(const char *node, const char *service,
1218 const struct addrinfo *hints,
1219 struct addrinfo **res)
1221 struct hostent *h = NULL;
1222 struct addrinfo *ai;
1223 struct sockaddr_in *sin;
1225 if (node) {
1226 h = gethostbyname(node);
1227 if (!h)
1228 return WSAGetLastError();
1231 ai = xmalloc(sizeof(struct addrinfo));
1232 *res = ai;
1233 ai->ai_flags = 0;
1234 ai->ai_family = AF_INET;
1235 ai->ai_socktype = hints ? hints->ai_socktype : 0;
1236 switch (ai->ai_socktype) {
1237 case SOCK_STREAM:
1238 ai->ai_protocol = IPPROTO_TCP;
1239 break;
1240 case SOCK_DGRAM:
1241 ai->ai_protocol = IPPROTO_UDP;
1242 break;
1243 default:
1244 ai->ai_protocol = 0;
1245 break;
1247 ai->ai_addrlen = sizeof(struct sockaddr_in);
1248 if (hints && (hints->ai_flags & AI_CANONNAME))
1249 ai->ai_canonname = h ? xstrdup(h->h_name) : NULL;
1250 else
1251 ai->ai_canonname = NULL;
1253 sin = xmalloc(ai->ai_addrlen);
1254 memset(sin, 0, ai->ai_addrlen);
1255 sin->sin_family = AF_INET;
1256 /* Note: getaddrinfo is supposed to allow service to be a string,
1257 * which should be looked up using getservbyname. This is
1258 * currently not implemented */
1259 if (service)
1260 sin->sin_port = htons(atoi(service));
1261 if (h)
1262 sin->sin_addr = *(struct in_addr *)h->h_addr;
1263 else if (hints && (hints->ai_flags & AI_PASSIVE))
1264 sin->sin_addr.s_addr = INADDR_ANY;
1265 else
1266 sin->sin_addr.s_addr = INADDR_LOOPBACK;
1267 ai->ai_addr = (struct sockaddr *)sin;
1268 ai->ai_next = 0;
1269 return 0;
1272 static void WSAAPI freeaddrinfo_stub(struct addrinfo *res)
1274 free(res->ai_canonname);
1275 free(res->ai_addr);
1276 free(res);
1279 static int WSAAPI getnameinfo_stub(const struct sockaddr *sa, socklen_t salen,
1280 char *host, DWORD hostlen,
1281 char *serv, DWORD servlen, int flags)
1283 const struct sockaddr_in *sin = (const struct sockaddr_in *)sa;
1284 if (sa->sa_family != AF_INET)
1285 return EAI_FAMILY;
1286 if (!host && !serv)
1287 return EAI_NONAME;
1289 if (host && hostlen > 0) {
1290 struct hostent *ent = NULL;
1291 if (!(flags & NI_NUMERICHOST))
1292 ent = gethostbyaddr((const char *)&sin->sin_addr,
1293 sizeof(sin->sin_addr), AF_INET);
1295 if (ent)
1296 snprintf(host, hostlen, "%s", ent->h_name);
1297 else if (flags & NI_NAMEREQD)
1298 return EAI_NONAME;
1299 else
1300 snprintf(host, hostlen, "%s", inet_ntoa(sin->sin_addr));
1303 if (serv && servlen > 0) {
1304 struct servent *ent = NULL;
1305 if (!(flags & NI_NUMERICSERV))
1306 ent = getservbyport(sin->sin_port,
1307 flags & NI_DGRAM ? "udp" : "tcp");
1309 if (ent)
1310 snprintf(serv, servlen, "%s", ent->s_name);
1311 else
1312 snprintf(serv, servlen, "%d", ntohs(sin->sin_port));
1315 return 0;
1318 static HMODULE ipv6_dll = NULL;
1319 static void (WSAAPI *ipv6_freeaddrinfo)(struct addrinfo *res);
1320 static int (WSAAPI *ipv6_getaddrinfo)(const char *node, const char *service,
1321 const struct addrinfo *hints,
1322 struct addrinfo **res);
1323 static int (WSAAPI *ipv6_getnameinfo)(const struct sockaddr *sa, socklen_t salen,
1324 char *host, DWORD hostlen,
1325 char *serv, DWORD servlen, int flags);
1327 * gai_strerror is an inline function in the ws2tcpip.h header, so we
1328 * don't need to try to load that one dynamically.
1331 static void socket_cleanup(void)
1333 WSACleanup();
1334 if (ipv6_dll)
1335 FreeLibrary(ipv6_dll);
1336 ipv6_dll = NULL;
1337 ipv6_freeaddrinfo = freeaddrinfo_stub;
1338 ipv6_getaddrinfo = getaddrinfo_stub;
1339 ipv6_getnameinfo = getnameinfo_stub;
1342 static void ensure_socket_initialization(void)
1344 WSADATA wsa;
1345 static int initialized = 0;
1346 const char *libraries[] = { "ws2_32.dll", "wship6.dll", NULL };
1347 const char **name;
1349 if (initialized)
1350 return;
1352 if (WSAStartup(MAKEWORD(2,2), &wsa))
1353 die("unable to initialize winsock subsystem, error %d",
1354 WSAGetLastError());
1356 for (name = libraries; *name; name++) {
1357 ipv6_dll = LoadLibrary(*name);
1358 if (!ipv6_dll)
1359 continue;
1361 ipv6_freeaddrinfo = (void (WSAAPI *)(struct addrinfo *))
1362 GetProcAddress(ipv6_dll, "freeaddrinfo");
1363 ipv6_getaddrinfo = (int (WSAAPI *)(const char *, const char *,
1364 const struct addrinfo *,
1365 struct addrinfo **))
1366 GetProcAddress(ipv6_dll, "getaddrinfo");
1367 ipv6_getnameinfo = (int (WSAAPI *)(const struct sockaddr *,
1368 socklen_t, char *, DWORD,
1369 char *, DWORD, int))
1370 GetProcAddress(ipv6_dll, "getnameinfo");
1371 if (!ipv6_freeaddrinfo || !ipv6_getaddrinfo || !ipv6_getnameinfo) {
1372 FreeLibrary(ipv6_dll);
1373 ipv6_dll = NULL;
1374 } else
1375 break;
1377 if (!ipv6_freeaddrinfo || !ipv6_getaddrinfo || !ipv6_getnameinfo) {
1378 ipv6_freeaddrinfo = freeaddrinfo_stub;
1379 ipv6_getaddrinfo = getaddrinfo_stub;
1380 ipv6_getnameinfo = getnameinfo_stub;
1383 atexit(socket_cleanup);
1384 initialized = 1;
1387 #undef gethostname
1388 int mingw_gethostname(char *name, int namelen)
1390 ensure_socket_initialization();
1391 return gethostname(name, namelen);
1394 #undef gethostbyname
1395 struct hostent *mingw_gethostbyname(const char *host)
1397 ensure_socket_initialization();
1398 return gethostbyname(host);
1401 void mingw_freeaddrinfo(struct addrinfo *res)
1403 ipv6_freeaddrinfo(res);
1406 int mingw_getaddrinfo(const char *node, const char *service,
1407 const struct addrinfo *hints, struct addrinfo **res)
1409 ensure_socket_initialization();
1410 return ipv6_getaddrinfo(node, service, hints, res);
1413 int mingw_getnameinfo(const struct sockaddr *sa, socklen_t salen,
1414 char *host, DWORD hostlen, char *serv, DWORD servlen,
1415 int flags)
1417 ensure_socket_initialization();
1418 return ipv6_getnameinfo(sa, salen, host, hostlen, serv, servlen, flags);
1421 int mingw_socket(int domain, int type, int protocol)
1423 int sockfd;
1424 SOCKET s;
1426 ensure_socket_initialization();
1427 s = WSASocket(domain, type, protocol, NULL, 0, 0);
1428 if (s == INVALID_SOCKET) {
1430 * WSAGetLastError() values are regular BSD error codes
1431 * biased by WSABASEERR.
1432 * However, strerror() does not know about networking
1433 * specific errors, which are values beginning at 38 or so.
1434 * Therefore, we choose to leave the biased error code
1435 * in errno so that _if_ someone looks up the code somewhere,
1436 * then it is at least the number that are usually listed.
1438 errno = WSAGetLastError();
1439 return -1;
1441 /* convert into a file descriptor */
1442 if ((sockfd = _open_osfhandle(s, O_RDWR|O_BINARY)) < 0) {
1443 closesocket(s);
1444 return error("unable to make a socket file descriptor: %s",
1445 strerror(errno));
1447 return sockfd;
1450 #undef connect
1451 int mingw_connect(int sockfd, struct sockaddr *sa, size_t sz)
1453 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
1454 return connect(s, sa, sz);
1457 #undef bind
1458 int mingw_bind(int sockfd, struct sockaddr *sa, size_t sz)
1460 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
1461 return bind(s, sa, sz);
1464 #undef setsockopt
1465 int mingw_setsockopt(int sockfd, int lvl, int optname, void *optval, int optlen)
1467 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
1468 return setsockopt(s, lvl, optname, (const char*)optval, optlen);
1471 #undef shutdown
1472 int mingw_shutdown(int sockfd, int how)
1474 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
1475 return shutdown(s, how);
1478 #undef listen
1479 int mingw_listen(int sockfd, int backlog)
1481 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
1482 return listen(s, backlog);
1485 #undef accept
1486 int mingw_accept(int sockfd1, struct sockaddr *sa, socklen_t *sz)
1488 int sockfd2;
1490 SOCKET s1 = (SOCKET)_get_osfhandle(sockfd1);
1491 SOCKET s2 = accept(s1, sa, sz);
1493 /* convert into a file descriptor */
1494 if ((sockfd2 = _open_osfhandle(s2, O_RDWR|O_BINARY)) < 0) {
1495 int err = errno;
1496 closesocket(s2);
1497 return error("unable to make a socket file descriptor: %s",
1498 strerror(err));
1500 return sockfd2;
1503 #undef rename
1504 int mingw_rename(const char *pold, const char *pnew)
1506 DWORD attrs, gle;
1507 int tries = 0;
1510 * Try native rename() first to get errno right.
1511 * It is based on MoveFile(), which cannot overwrite existing files.
1513 if (!rename(pold, pnew))
1514 return 0;
1515 if (errno != EEXIST)
1516 return -1;
1517 repeat:
1518 if (MoveFileEx(pold, pnew, MOVEFILE_REPLACE_EXISTING))
1519 return 0;
1520 /* TODO: translate more errors */
1521 gle = GetLastError();
1522 if (gle == ERROR_ACCESS_DENIED &&
1523 (attrs = GetFileAttributes(pnew)) != INVALID_FILE_ATTRIBUTES) {
1524 if (attrs & FILE_ATTRIBUTE_DIRECTORY) {
1525 errno = EISDIR;
1526 return -1;
1528 if ((attrs & FILE_ATTRIBUTE_READONLY) &&
1529 SetFileAttributes(pnew, attrs & ~FILE_ATTRIBUTE_READONLY)) {
1530 if (MoveFileEx(pold, pnew, MOVEFILE_REPLACE_EXISTING))
1531 return 0;
1532 gle = GetLastError();
1533 /* revert file attributes on failure */
1534 SetFileAttributes(pnew, attrs);
1537 if (tries < ARRAY_SIZE(delay) && gle == ERROR_ACCESS_DENIED) {
1539 * We assume that some other process had the source or
1540 * destination file open at the wrong moment and retry.
1541 * In order to give the other process a higher chance to
1542 * complete its operation, we give up our time slice now.
1543 * If we have to retry again, we do sleep a bit.
1545 Sleep(delay[tries]);
1546 tries++;
1547 goto repeat;
1549 if (gle == ERROR_ACCESS_DENIED &&
1550 ask_yes_no_if_possible("Rename from '%s' to '%s' failed. "
1551 "Should I try again?", pold, pnew))
1552 goto repeat;
1554 errno = EACCES;
1555 return -1;
1559 * Note that this doesn't return the actual pagesize, but
1560 * the allocation granularity. If future Windows specific git code
1561 * needs the real getpagesize function, we need to find another solution.
1563 int mingw_getpagesize(void)
1565 SYSTEM_INFO si;
1566 GetSystemInfo(&si);
1567 return si.dwAllocationGranularity;
1570 struct passwd *getpwuid(int uid)
1572 static char user_name[100];
1573 static struct passwd p;
1575 DWORD len = sizeof(user_name);
1576 if (!GetUserName(user_name, &len))
1577 return NULL;
1578 p.pw_name = user_name;
1579 p.pw_gecos = "unknown";
1580 p.pw_dir = NULL;
1581 return &p;
1584 static HANDLE timer_event;
1585 static HANDLE timer_thread;
1586 static int timer_interval;
1587 static int one_shot;
1588 static sig_handler_t timer_fn = SIG_DFL;
1590 /* The timer works like this:
1591 * The thread, ticktack(), is a trivial routine that most of the time
1592 * only waits to receive the signal to terminate. The main thread tells
1593 * the thread to terminate by setting the timer_event to the signalled
1594 * state.
1595 * But ticktack() interrupts the wait state after the timer's interval
1596 * length to call the signal handler.
1599 static unsigned __stdcall ticktack(void *dummy)
1601 while (WaitForSingleObject(timer_event, timer_interval) == WAIT_TIMEOUT) {
1602 if (timer_fn == SIG_DFL)
1603 die("Alarm");
1604 if (timer_fn != SIG_IGN)
1605 timer_fn(SIGALRM);
1606 if (one_shot)
1607 break;
1609 return 0;
1612 static int start_timer_thread(void)
1614 timer_event = CreateEvent(NULL, FALSE, FALSE, NULL);
1615 if (timer_event) {
1616 timer_thread = (HANDLE) _beginthreadex(NULL, 0, ticktack, NULL, 0, NULL);
1617 if (!timer_thread )
1618 return errno = ENOMEM,
1619 error("cannot start timer thread");
1620 } else
1621 return errno = ENOMEM,
1622 error("cannot allocate resources for timer");
1623 return 0;
1626 static void stop_timer_thread(void)
1628 if (timer_event)
1629 SetEvent(timer_event); /* tell thread to terminate */
1630 if (timer_thread) {
1631 int rc = WaitForSingleObject(timer_thread, 1000);
1632 if (rc == WAIT_TIMEOUT)
1633 error("timer thread did not terminate timely");
1634 else if (rc != WAIT_OBJECT_0)
1635 error("waiting for timer thread failed: %lu",
1636 GetLastError());
1637 CloseHandle(timer_thread);
1639 if (timer_event)
1640 CloseHandle(timer_event);
1641 timer_event = NULL;
1642 timer_thread = NULL;
1645 static inline int is_timeval_eq(const struct timeval *i1, const struct timeval *i2)
1647 return i1->tv_sec == i2->tv_sec && i1->tv_usec == i2->tv_usec;
1650 int setitimer(int type, struct itimerval *in, struct itimerval *out)
1652 static const struct timeval zero;
1653 static int atexit_done;
1655 if (out != NULL)
1656 return errno = EINVAL,
1657 error("setitimer param 3 != NULL not implemented");
1658 if (!is_timeval_eq(&in->it_interval, &zero) &&
1659 !is_timeval_eq(&in->it_interval, &in->it_value))
1660 return errno = EINVAL,
1661 error("setitimer: it_interval must be zero or eq it_value");
1663 if (timer_thread)
1664 stop_timer_thread();
1666 if (is_timeval_eq(&in->it_value, &zero) &&
1667 is_timeval_eq(&in->it_interval, &zero))
1668 return 0;
1670 timer_interval = in->it_value.tv_sec * 1000 + in->it_value.tv_usec / 1000;
1671 one_shot = is_timeval_eq(&in->it_interval, &zero);
1672 if (!atexit_done) {
1673 atexit(stop_timer_thread);
1674 atexit_done = 1;
1676 return start_timer_thread();
1679 int sigaction(int sig, struct sigaction *in, struct sigaction *out)
1681 if (sig != SIGALRM)
1682 return errno = EINVAL,
1683 error("sigaction only implemented for SIGALRM");
1684 if (out != NULL)
1685 return errno = EINVAL,
1686 error("sigaction: param 3 != NULL not implemented");
1688 timer_fn = in->sa_handler;
1689 return 0;
1692 #undef signal
1693 sig_handler_t mingw_signal(int sig, sig_handler_t handler)
1695 sig_handler_t old = timer_fn;
1696 if (sig != SIGALRM)
1697 return signal(sig, handler);
1698 timer_fn = handler;
1699 return old;
1702 static const char *make_backslash_path(const char *path)
1704 static char buf[PATH_MAX + 1];
1705 char *c;
1707 if (strlcpy(buf, path, PATH_MAX) >= PATH_MAX)
1708 die("Too long path: %.*s", 60, path);
1710 for (c = buf; *c; c++) {
1711 if (*c == '/')
1712 *c = '\\';
1714 return buf;
1717 void mingw_open_html(const char *unixpath)
1719 const char *htmlpath = make_backslash_path(unixpath);
1720 typedef HINSTANCE (WINAPI *T)(HWND, const char *,
1721 const char *, const char *, const char *, INT);
1722 T ShellExecute;
1723 HMODULE shell32;
1724 int r;
1726 shell32 = LoadLibrary("shell32.dll");
1727 if (!shell32)
1728 die("cannot load shell32.dll");
1729 ShellExecute = (T)GetProcAddress(shell32, "ShellExecuteA");
1730 if (!ShellExecute)
1731 die("cannot run browser");
1733 printf("Launching default browser to display HTML ...\n");
1734 r = (int)ShellExecute(NULL, "open", htmlpath, NULL, "\\", SW_SHOWNORMAL);
1735 FreeLibrary(shell32);
1736 /* see the MSDN documentation referring to the result codes here */
1737 if (r <= 32) {
1738 die("failed to launch browser for %.*s", MAX_PATH, unixpath);
1742 int link(const char *oldpath, const char *newpath)
1744 typedef BOOL (WINAPI *T)(const char*, const char*, LPSECURITY_ATTRIBUTES);
1745 static T create_hard_link = NULL;
1746 if (!create_hard_link) {
1747 create_hard_link = (T) GetProcAddress(
1748 GetModuleHandle("kernel32.dll"), "CreateHardLinkA");
1749 if (!create_hard_link)
1750 create_hard_link = (T)-1;
1752 if (create_hard_link == (T)-1) {
1753 errno = ENOSYS;
1754 return -1;
1756 if (!create_hard_link(newpath, oldpath, NULL)) {
1757 errno = err_win_to_posix(GetLastError());
1758 return -1;
1760 return 0;
1763 char *getpass(const char *prompt)
1765 struct strbuf buf = STRBUF_INIT;
1767 fputs(prompt, stderr);
1768 for (;;) {
1769 char c = _getch();
1770 if (c == '\r' || c == '\n')
1771 break;
1772 strbuf_addch(&buf, c);
1774 fputs("\n", stderr);
1775 return strbuf_detach(&buf, NULL);
1778 pid_t waitpid(pid_t pid, int *status, int options)
1780 HANDLE h = OpenProcess(SYNCHRONIZE | PROCESS_QUERY_INFORMATION,
1781 FALSE, pid);
1782 if (!h) {
1783 errno = ECHILD;
1784 return -1;
1787 if (pid > 0 && options & WNOHANG) {
1788 if (WAIT_OBJECT_0 != WaitForSingleObject(h, 0)) {
1789 CloseHandle(h);
1790 return 0;
1792 options &= ~WNOHANG;
1795 if (options == 0) {
1796 struct pinfo_t **ppinfo;
1797 if (WaitForSingleObject(h, INFINITE) != WAIT_OBJECT_0) {
1798 CloseHandle(h);
1799 return 0;
1802 if (status)
1803 GetExitCodeProcess(h, (LPDWORD)status);
1805 EnterCriticalSection(&pinfo_cs);
1807 ppinfo = &pinfo;
1808 while (*ppinfo) {
1809 struct pinfo_t *info = *ppinfo;
1810 if (info->pid == pid) {
1811 CloseHandle(info->proc);
1812 *ppinfo = info->next;
1813 free(info);
1814 break;
1816 ppinfo = &info->next;
1819 LeaveCriticalSection(&pinfo_cs);
1821 CloseHandle(h);
1822 return pid;
1824 CloseHandle(h);
1826 errno = EINVAL;
1827 return -1;