submodule: Use cat instead of echo to avoid DOS line-endings
[git/dscho.git] / compat / mingw.c
blobb8928575d7f0506e4c6d7293e9263c074ff2cc23
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 && !is_bare_repository() &&
295 make_hidden(dir))
296 warning("Failed to make '%s' hidden", dir);
297 git_config_set("core.hideDotFiles",
298 hide_dotfiles == HIDE_DOTFILES_FALSE ? "false" :
299 (hide_dotfiles == HIDE_DOTFILES_DOTGITONLY ?
300 "dotGitOnly" : "true"));
303 #undef mkdir
304 int mingw_mkdir(const char *path, int mode)
306 int ret = mkdir(path);
307 if (!ret && hide_dotfiles == HIDE_DOTFILES_TRUE) {
309 * In Windows a file or dir starting with a dot is not
310 * automatically hidden. So lets mark it as hidden when
311 * such a directory is created.
313 const char *start = basename((char*)path);
314 if (*start == '.')
315 return make_hidden(path);
317 return ret;
320 #undef open
321 int mingw_open (const char *filename, int oflags, ...)
323 va_list args;
324 unsigned mode;
325 int fd;
327 va_start(args, oflags);
328 mode = va_arg(args, int);
329 va_end(args);
331 if (filename && !strcmp(filename, "/dev/null"))
332 filename = "nul";
334 fd = open(filename, oflags, mode);
336 if (fd < 0 && (oflags & O_CREAT) && errno == EACCES) {
337 DWORD attrs = GetFileAttributes(filename);
338 if (attrs != INVALID_FILE_ATTRIBUTES && (attrs & FILE_ATTRIBUTE_DIRECTORY))
339 errno = EISDIR;
341 if ((oflags & O_CREAT) && fd >= 0 &&
342 hide_dotfiles == HIDE_DOTFILES_TRUE) {
344 * In Windows a file or dir starting with a dot is not
345 * automatically hidden. So lets mark it as hidden when
346 * such a file is created.
348 const char *start = basename((char*)filename);
349 if (*start == '.' && make_hidden(filename))
350 warning("Could not mark '%s' as hidden.", filename);
352 return fd;
355 #undef write
356 ssize_t mingw_write(int fd, const void *buf, size_t count)
359 * While write() calls to a file on a local disk are translated
360 * into WriteFile() calls with a maximum size of 64KB on Windows
361 * XP and 256KB on Vista, no such cap is placed on writes to
362 * files over the network on Windows XP. Unfortunately, there
363 * seems to be a limit of 32MB-28KB on X64 and 64MB-32KB on x86;
364 * bigger writes fail on Windows XP.
365 * So we cap to a nice 31MB here to avoid write failures over
366 * the net without changing the number of WriteFile() calls in
367 * the local case.
369 return write(fd, buf, min(count, 31 * 1024 * 1024));
372 #undef fopen
373 FILE *mingw_fopen (const char *filename, const char *otype)
375 int hide = 0;
376 FILE *file;
377 if (hide_dotfiles == HIDE_DOTFILES_TRUE &&
378 basename((char*)filename)[0] == '.')
379 hide = access(filename, F_OK);
380 if (filename && !strcmp(filename, "/dev/null"))
381 filename = "nul";
382 file = fopen(filename, otype);
383 if (file && hide && make_hidden(filename))
384 warning("Could not mark '%s' as hidden.", filename);
385 return file;
388 #undef freopen
389 FILE *mingw_freopen (const char *filename, const char *otype, FILE *stream)
391 int hide = 0;
392 FILE *file;
393 if (hide_dotfiles == HIDE_DOTFILES_TRUE &&
394 basename((char*)filename)[0] == '.')
395 hide = access(filename, F_OK);
396 if (filename && !strcmp(filename, "/dev/null"))
397 filename = "nul";
398 file = freopen(filename, otype, stream);
399 if (file && hide && make_hidden(filename))
400 warning("Could not mark '%s' as hidden.", filename);
401 return file;
405 * The unit of FILETIME is 100-nanoseconds since January 1, 1601, UTC.
406 * Returns the 100-nanoseconds ("hekto nanoseconds") since the epoch.
408 static inline long long filetime_to_hnsec(const FILETIME *ft)
410 long long winTime = ((long long)ft->dwHighDateTime << 32) + ft->dwLowDateTime;
411 /* Windows to Unix Epoch conversion */
412 return winTime - 116444736000000000LL;
415 static inline time_t filetime_to_time_t(const FILETIME *ft)
417 return (time_t)(filetime_to_hnsec(ft) / 10000000);
420 /* We keep the do_lstat code in a separate function to avoid recursion.
421 * When a path ends with a slash, the stat will fail with ENOENT. In
422 * this case, we strip the trailing slashes and stat again.
424 * If follow is true then act like stat() and report on the link
425 * target. Otherwise report on the link itself.
427 static int do_lstat(int follow, const char *file_name, struct stat *buf)
429 int err;
430 WIN32_FILE_ATTRIBUTE_DATA fdata;
432 if (!(err = get_file_attr(file_name, &fdata))) {
433 buf->st_ino = 0;
434 buf->st_gid = 0;
435 buf->st_uid = 0;
436 buf->st_nlink = 1;
437 buf->st_mode = file_attr_to_st_mode(fdata.dwFileAttributes);
438 buf->st_size = fdata.nFileSizeLow |
439 (((off_t)fdata.nFileSizeHigh)<<32);
440 buf->st_dev = buf->st_rdev = 0; /* not used by Git */
441 buf->st_atime = filetime_to_time_t(&(fdata.ftLastAccessTime));
442 buf->st_mtime = filetime_to_time_t(&(fdata.ftLastWriteTime));
443 buf->st_ctime = filetime_to_time_t(&(fdata.ftCreationTime));
444 if (fdata.dwFileAttributes & FILE_ATTRIBUTE_REPARSE_POINT) {
445 WIN32_FIND_DATAA findbuf;
446 HANDLE handle = FindFirstFileA(file_name, &findbuf);
447 if (handle != INVALID_HANDLE_VALUE) {
448 if ((findbuf.dwFileAttributes & FILE_ATTRIBUTE_REPARSE_POINT) &&
449 (findbuf.dwReserved0 == IO_REPARSE_TAG_SYMLINK)) {
450 if (follow) {
451 char buffer[MAXIMUM_REPARSE_DATA_BUFFER_SIZE];
452 buf->st_size = readlink(file_name, buffer, MAXIMUM_REPARSE_DATA_BUFFER_SIZE);
453 } else {
454 buf->st_mode = S_IFLNK;
456 buf->st_mode |= S_IREAD;
457 if (!(findbuf.dwFileAttributes & FILE_ATTRIBUTE_READONLY))
458 buf->st_mode |= S_IWRITE;
460 FindClose(handle);
463 return 0;
465 errno = err;
466 return -1;
469 /* We provide our own lstat/fstat functions, since the provided
470 * lstat/fstat functions are so slow. These stat functions are
471 * tailored for Git's usage (read: fast), and are not meant to be
472 * complete. Note that Git stat()s are redirected to mingw_lstat()
473 * too, since Windows doesn't really handle symlinks that well.
475 static int do_stat_internal(int follow, const char *file_name, struct stat *buf)
477 int namelen;
478 static char alt_name[PATH_MAX];
480 if (!do_lstat(follow, file_name, buf))
481 return 0;
483 /* if file_name ended in a '/', Windows returned ENOENT;
484 * try again without trailing slashes
486 if (errno != ENOENT)
487 return -1;
489 namelen = strlen(file_name);
490 if (namelen && file_name[namelen-1] != '/')
491 return -1;
492 while (namelen && file_name[namelen-1] == '/')
493 --namelen;
494 if (!namelen || namelen >= PATH_MAX)
495 return -1;
497 memcpy(alt_name, file_name, namelen);
498 alt_name[namelen] = 0;
499 return do_lstat(follow, alt_name, buf);
502 int mingw_lstat(const char *file_name, struct stat *buf)
504 return do_stat_internal(0, file_name, buf);
506 int mingw_stat(const char *file_name, struct stat *buf)
508 return do_stat_internal(1, file_name, buf);
511 #undef fstat
512 int mingw_fstat(int fd, struct stat *buf)
514 HANDLE fh = (HANDLE)_get_osfhandle(fd);
515 BY_HANDLE_FILE_INFORMATION fdata;
517 if (fh == INVALID_HANDLE_VALUE) {
518 errno = EBADF;
519 return -1;
521 /* direct non-file handles to MS's fstat() */
522 if (GetFileType(fh) != FILE_TYPE_DISK)
523 return _fstati64(fd, buf);
525 if (GetFileInformationByHandle(fh, &fdata)) {
526 buf->st_ino = 0;
527 buf->st_gid = 0;
528 buf->st_uid = 0;
529 buf->st_nlink = 1;
530 buf->st_mode = file_attr_to_st_mode(fdata.dwFileAttributes);
531 buf->st_size = fdata.nFileSizeLow |
532 (((off_t)fdata.nFileSizeHigh)<<32);
533 buf->st_dev = buf->st_rdev = 0; /* not used by Git */
534 buf->st_atime = filetime_to_time_t(&(fdata.ftLastAccessTime));
535 buf->st_mtime = filetime_to_time_t(&(fdata.ftLastWriteTime));
536 buf->st_ctime = filetime_to_time_t(&(fdata.ftCreationTime));
537 return 0;
539 errno = EBADF;
540 return -1;
543 static inline void time_t_to_filetime(time_t t, FILETIME *ft)
545 long long winTime = t * 10000000LL + 116444736000000000LL;
546 ft->dwLowDateTime = winTime;
547 ft->dwHighDateTime = winTime >> 32;
550 int mingw_utime (const char *file_name, const struct utimbuf *times)
552 FILETIME mft, aft;
553 int fh, rc;
555 /* must have write permission */
556 DWORD attrs = GetFileAttributes(file_name);
557 if (attrs != INVALID_FILE_ATTRIBUTES &&
558 (attrs & FILE_ATTRIBUTE_READONLY)) {
559 /* ignore errors here; open() will report them */
560 SetFileAttributes(file_name, attrs & ~FILE_ATTRIBUTE_READONLY);
563 if ((fh = open(file_name, O_RDWR | O_BINARY)) < 0) {
564 rc = -1;
565 goto revert_attrs;
568 if (times) {
569 time_t_to_filetime(times->modtime, &mft);
570 time_t_to_filetime(times->actime, &aft);
571 } else {
572 GetSystemTimeAsFileTime(&mft);
573 aft = mft;
575 if (!SetFileTime((HANDLE)_get_osfhandle(fh), NULL, &aft, &mft)) {
576 errno = EINVAL;
577 rc = -1;
578 } else
579 rc = 0;
580 close(fh);
582 revert_attrs:
583 if (attrs != INVALID_FILE_ATTRIBUTES &&
584 (attrs & FILE_ATTRIBUTE_READONLY)) {
585 /* ignore errors again */
586 SetFileAttributes(file_name, attrs);
588 return rc;
591 unsigned int sleep (unsigned int seconds)
593 Sleep(seconds*1000);
594 return 0;
597 int mkstemp(char *template)
599 char *filename = mktemp(template);
600 if (filename == NULL)
601 return -1;
602 return open(filename, O_RDWR | O_CREAT, 0600);
605 int gettimeofday(struct timeval *tv, void *tz)
607 FILETIME ft;
608 long long hnsec;
610 GetSystemTimeAsFileTime(&ft);
611 hnsec = filetime_to_hnsec(&ft);
612 tv->tv_sec = hnsec / 10000000;
613 tv->tv_usec = (hnsec % 10000000) / 10;
614 return 0;
617 int pipe(int filedes[2])
619 HANDLE h[2];
621 /* this creates non-inheritable handles */
622 if (!CreatePipe(&h[0], &h[1], NULL, 8192)) {
623 errno = err_win_to_posix(GetLastError());
624 return -1;
626 filedes[0] = _open_osfhandle((int)h[0], O_NOINHERIT);
627 if (filedes[0] < 0) {
628 CloseHandle(h[0]);
629 CloseHandle(h[1]);
630 return -1;
632 filedes[1] = _open_osfhandle((int)h[1], O_NOINHERIT);
633 if (filedes[0] < 0) {
634 close(filedes[0]);
635 CloseHandle(h[1]);
636 return -1;
638 return 0;
641 struct tm *gmtime_r(const time_t *timep, struct tm *result)
643 /* gmtime() in MSVCRT.DLL is thread-safe, but not reentrant */
644 memcpy(result, gmtime(timep), sizeof(struct tm));
645 return result;
648 struct tm *localtime_r(const time_t *timep, struct tm *result)
650 /* localtime() in MSVCRT.DLL is thread-safe, but not reentrant */
651 memcpy(result, localtime(timep), sizeof(struct tm));
652 return result;
655 #undef getcwd
656 char *mingw_getcwd(char *pointer, int len)
658 int i;
659 char *ret = getcwd(pointer, len);
660 if (!ret)
661 return ret;
662 for (i = 0; pointer[i]; i++)
663 if (pointer[i] == '\\')
664 pointer[i] = '/';
665 return ret;
669 * See http://msdn2.microsoft.com/en-us/library/17w5ykft(vs.71).aspx
670 * (Parsing C++ Command-Line Arguments)
672 static const char *quote_arg(const char *arg)
674 /* count chars to quote */
675 int len = 0, n = 0;
676 int force_quotes = 0;
677 char *q, *d;
678 const char *p = arg;
679 if (!*p) force_quotes = 1;
680 while (*p) {
681 if (isspace(*p) || *p == '*' || *p == '?' || *p == '{' || *p == '\'')
682 force_quotes = 1;
683 else if (*p == '"')
684 n++;
685 else if (*p == '\\') {
686 int count = 0;
687 while (*p == '\\') {
688 count++;
689 p++;
690 len++;
692 if (*p == '"')
693 n += count*2 + 1;
694 continue;
696 len++;
697 p++;
699 if (!force_quotes && n == 0)
700 return arg;
702 /* insert \ where necessary */
703 d = q = xmalloc(len+n+3);
704 *d++ = '"';
705 while (*arg) {
706 if (*arg == '"')
707 *d++ = '\\';
708 else if (*arg == '\\') {
709 int count = 0;
710 while (*arg == '\\') {
711 count++;
712 *d++ = *arg++;
714 if (*arg == '"') {
715 while (count-- > 0)
716 *d++ = '\\';
717 *d++ = '\\';
720 *d++ = *arg++;
722 *d++ = '"';
723 *d++ = 0;
724 return q;
727 static const char *parse_interpreter(const char *cmd)
729 static char buf[100];
730 char *p, *opt;
731 int n, fd;
733 /* don't even try a .exe */
734 n = strlen(cmd);
735 if (n >= 4 && !strcasecmp(cmd+n-4, ".exe"))
736 return NULL;
738 fd = open(cmd, O_RDONLY);
739 if (fd < 0)
740 return NULL;
741 n = read(fd, buf, sizeof(buf)-1);
742 close(fd);
743 if (n < 4) /* at least '#!/x' and not error */
744 return NULL;
746 if (buf[0] != '#' || buf[1] != '!')
747 return NULL;
748 buf[n] = '\0';
749 p = buf + strcspn(buf, "\r\n");
750 if (!*p)
751 return NULL;
753 *p = '\0';
754 if (!(p = strrchr(buf+2, '/')) && !(p = strrchr(buf+2, '\\')))
755 return NULL;
756 /* strip options */
757 if ((opt = strchr(p+1, ' ')))
758 *opt = '\0';
759 return p+1;
763 * Splits the PATH into parts.
765 static char **get_path_split(void)
767 char *p, **path, *envpath = mingw_getenv("PATH");
768 int i, n = 0;
770 if (!envpath || !*envpath)
771 return NULL;
773 envpath = xstrdup(envpath);
774 p = envpath;
775 while (p) {
776 char *dir = p;
777 p = strchr(p, ';');
778 if (p) *p++ = '\0';
779 if (*dir) { /* not earlier, catches series of ; */
780 ++n;
783 if (!n)
784 return NULL;
786 path = xmalloc((n+1)*sizeof(char *));
787 p = envpath;
788 i = 0;
789 do {
790 if (*p)
791 path[i++] = xstrdup(p);
792 p = p+strlen(p)+1;
793 } while (i < n);
794 path[i] = NULL;
796 free(envpath);
798 return path;
801 static void free_path_split(char **path)
803 char **p = path;
805 if (!path)
806 return;
808 while (*p)
809 free(*p++);
810 free(path);
814 * exe_only means that we only want to detect .exe files, but not scripts
815 * (which do not have an extension)
817 static char *lookup_prog(const char *dir, const char *cmd, int isexe, int exe_only)
819 char path[MAX_PATH];
820 snprintf(path, sizeof(path), "%s/%s.exe", dir, cmd);
822 if (!isexe && access(path, F_OK) == 0)
823 return xstrdup(path);
824 path[strlen(path)-4] = '\0';
825 if ((!exe_only || isexe) && access(path, F_OK) == 0)
826 if (!(GetFileAttributes(path) & FILE_ATTRIBUTE_DIRECTORY))
827 return xstrdup(path);
828 return NULL;
832 * Determines the absolute path of cmd using the split path in path.
833 * If cmd contains a slash or backslash, no lookup is performed.
835 static char *path_lookup(const char *cmd, char **path, int exe_only)
837 char *prog = NULL;
838 int len = strlen(cmd);
839 int isexe = len >= 4 && !strcasecmp(cmd+len-4, ".exe");
841 if (strchr(cmd, '/') || strchr(cmd, '\\'))
842 prog = xstrdup(cmd);
844 while (!prog && *path)
845 prog = lookup_prog(*path++, cmd, isexe, exe_only);
847 return prog;
850 static int env_compare(const void *a, const void *b)
852 char *const *ea = a;
853 char *const *eb = b;
854 return strcasecmp(*ea, *eb);
857 struct pinfo_t {
858 struct pinfo_t *next;
859 pid_t pid;
860 HANDLE proc;
861 } pinfo_t;
862 struct pinfo_t *pinfo = NULL;
863 CRITICAL_SECTION pinfo_cs;
865 static pid_t mingw_spawnve_fd(const char *cmd, const char **argv, char **env,
866 const char *dir,
867 int prepend_cmd, int fhin, int fhout, int fherr)
869 STARTUPINFO si;
870 PROCESS_INFORMATION pi;
871 struct strbuf envblk, args;
872 unsigned flags;
873 BOOL ret;
875 /* Determine whether or not we are associated to a console */
876 HANDLE cons = CreateFile("CONOUT$", GENERIC_WRITE,
877 FILE_SHARE_WRITE, NULL, OPEN_EXISTING,
878 FILE_ATTRIBUTE_NORMAL, NULL);
879 if (cons == INVALID_HANDLE_VALUE) {
880 /* There is no console associated with this process.
881 * Since the child is a console process, Windows
882 * would normally create a console window. But
883 * since we'll be redirecting std streams, we do
884 * not need the console.
885 * It is necessary to use DETACHED_PROCESS
886 * instead of CREATE_NO_WINDOW to make ssh
887 * recognize that it has no console.
889 flags = DETACHED_PROCESS;
890 } else {
891 /* There is already a console. If we specified
892 * DETACHED_PROCESS here, too, Windows would
893 * disassociate the child from the console.
894 * The same is true for CREATE_NO_WINDOW.
895 * Go figure!
897 flags = 0;
898 CloseHandle(cons);
900 memset(&si, 0, sizeof(si));
901 si.cb = sizeof(si);
902 si.dwFlags = STARTF_USESTDHANDLES;
903 si.hStdInput = (HANDLE) _get_osfhandle(fhin);
904 si.hStdOutput = (HANDLE) _get_osfhandle(fhout);
905 si.hStdError = (HANDLE) _get_osfhandle(fherr);
907 /* concatenate argv, quoting args as we go */
908 strbuf_init(&args, 0);
909 if (prepend_cmd) {
910 char *quoted = (char *)quote_arg(cmd);
911 strbuf_addstr(&args, quoted);
912 if (quoted != cmd)
913 free(quoted);
915 for (; *argv; argv++) {
916 char *quoted = (char *)quote_arg(*argv);
917 if (*args.buf)
918 strbuf_addch(&args, ' ');
919 strbuf_addstr(&args, quoted);
920 if (quoted != *argv)
921 free(quoted);
924 if (env) {
925 int count = 0;
926 char **e, **sorted_env;
928 for (e = env; *e; e++)
929 count++;
931 /* environment must be sorted */
932 sorted_env = xmalloc(sizeof(*sorted_env) * (count + 1));
933 memcpy(sorted_env, env, sizeof(*sorted_env) * (count + 1));
934 qsort(sorted_env, count, sizeof(*sorted_env), env_compare);
936 strbuf_init(&envblk, 0);
937 for (e = sorted_env; *e; e++) {
938 strbuf_addstr(&envblk, *e);
939 strbuf_addch(&envblk, '\0');
941 free(sorted_env);
944 memset(&pi, 0, sizeof(pi));
945 ret = CreateProcess(cmd, args.buf, NULL, NULL, TRUE, flags,
946 env ? envblk.buf : NULL, dir, &si, &pi);
948 if (env)
949 strbuf_release(&envblk);
950 strbuf_release(&args);
952 if (!ret) {
953 errno = ENOENT;
954 return -1;
956 CloseHandle(pi.hThread);
959 * The process ID is the human-readable identifier of the process
960 * that we want to present in log and error messages. The handle
961 * is not useful for this purpose. But we cannot close it, either,
962 * because it is not possible to turn a process ID into a process
963 * handle after the process terminated.
964 * Keep the handle in a list for waitpid.
966 EnterCriticalSection(&pinfo_cs);
968 struct pinfo_t *info = xmalloc(sizeof(struct pinfo_t));
969 info->pid = pi.dwProcessId;
970 info->proc = pi.hProcess;
971 info->next = pinfo;
972 pinfo = info;
974 LeaveCriticalSection(&pinfo_cs);
976 return (pid_t)pi.dwProcessId;
979 static pid_t mingw_spawnve(const char *cmd, const char **argv, char **env,
980 int prepend_cmd)
982 return mingw_spawnve_fd(cmd, argv, env, NULL, prepend_cmd, 0, 1, 2);
985 pid_t mingw_spawnvpe(const char *cmd, const char **argv, char **env,
986 const char *dir,
987 int fhin, int fhout, int fherr)
989 pid_t pid;
990 char **path = get_path_split();
991 char *prog = path_lookup(cmd, path, 0);
993 if (!prog) {
994 errno = ENOENT;
995 pid = -1;
997 else {
998 const char *interpr = parse_interpreter(prog);
1000 if (interpr) {
1001 const char *argv0 = argv[0];
1002 char *iprog = path_lookup(interpr, path, 1);
1003 argv[0] = prog;
1004 if (!iprog) {
1005 errno = ENOENT;
1006 pid = -1;
1008 else {
1009 pid = mingw_spawnve_fd(iprog, argv, env, dir, 1,
1010 fhin, fhout, fherr);
1011 free(iprog);
1013 argv[0] = argv0;
1015 else
1016 pid = mingw_spawnve_fd(prog, argv, env, dir, 0,
1017 fhin, fhout, fherr);
1018 free(prog);
1020 free_path_split(path);
1021 return pid;
1024 static int try_shell_exec(const char *cmd, char *const *argv, char **env)
1026 const char *interpr = parse_interpreter(cmd);
1027 char **path;
1028 char *prog;
1029 int pid = 0;
1031 if (!interpr)
1032 return 0;
1033 path = get_path_split();
1034 prog = path_lookup(interpr, path, 1);
1035 if (prog) {
1036 int argc = 0;
1037 const char **argv2;
1038 while (argv[argc]) argc++;
1039 argv2 = xmalloc(sizeof(*argv) * (argc+1));
1040 argv2[0] = (char *)cmd; /* full path to the script file */
1041 memcpy(&argv2[1], &argv[1], sizeof(*argv) * argc);
1042 pid = mingw_spawnve(prog, argv2, env, 1);
1043 if (pid >= 0) {
1044 int status;
1045 if (waitpid(pid, &status, 0) < 0)
1046 status = 255;
1047 exit(status);
1049 pid = 1; /* indicate that we tried but failed */
1050 free(prog);
1051 free(argv2);
1053 free_path_split(path);
1054 return pid;
1057 static void mingw_execve(const char *cmd, char *const *argv, char *const *env)
1059 /* check if git_command is a shell script */
1060 if (!try_shell_exec(cmd, argv, (char **)env)) {
1061 int pid, status;
1063 pid = mingw_spawnve(cmd, (const char **)argv, (char **)env, 0);
1064 if (pid < 0)
1065 return;
1066 if (waitpid(pid, &status, 0) < 0)
1067 status = 255;
1068 exit(status);
1072 void mingw_execvp(const char *cmd, char *const *argv)
1074 char **path = get_path_split();
1075 char *prog = path_lookup(cmd, path, 0);
1077 if (prog) {
1078 mingw_execve(prog, argv, environ);
1079 free(prog);
1080 } else
1081 errno = ENOENT;
1083 free_path_split(path);
1086 void mingw_execv(const char *cmd, char *const *argv)
1088 mingw_execve(cmd, argv, environ);
1091 int mingw_kill(pid_t pid, int sig)
1093 if (pid > 0 && sig == SIGTERM) {
1094 HANDLE h = OpenProcess(PROCESS_TERMINATE, FALSE, pid);
1096 if (TerminateProcess(h, -1)) {
1097 CloseHandle(h);
1098 return 0;
1101 errno = err_win_to_posix(GetLastError());
1102 CloseHandle(h);
1103 return -1;
1106 errno = EINVAL;
1107 return -1;
1110 static char **copy_environ(void)
1112 char **env;
1113 int i = 0;
1114 while (environ[i])
1115 i++;
1116 env = xmalloc((i+1)*sizeof(*env));
1117 for (i = 0; environ[i]; i++)
1118 env[i] = xstrdup(environ[i]);
1119 env[i] = NULL;
1120 return env;
1123 void free_environ(char **env)
1125 int i;
1126 for (i = 0; env[i]; i++)
1127 free(env[i]);
1128 free(env);
1131 static int lookup_env(char **env, const char *name, size_t nmln)
1133 int i;
1135 for (i = 0; env[i]; i++) {
1136 if (0 == strncmp(env[i], name, nmln)
1137 && '=' == env[i][nmln])
1138 /* matches */
1139 return i;
1141 return -1;
1145 * If name contains '=', then sets the variable, otherwise it unsets it
1147 static char **env_setenv(char **env, const char *name)
1149 char *eq = strchrnul(name, '=');
1150 int i = lookup_env(env, name, eq-name);
1152 if (i < 0) {
1153 if (*eq) {
1154 for (i = 0; env[i]; i++)
1156 env = xrealloc(env, (i+2)*sizeof(*env));
1157 env[i] = xstrdup(name);
1158 env[i+1] = NULL;
1161 else {
1162 free(env[i]);
1163 if (*eq)
1164 env[i] = xstrdup(name);
1165 else
1166 for (; env[i]; i++)
1167 env[i] = env[i+1];
1169 return env;
1173 * Copies global environ and adjusts variables as specified by vars.
1175 char **make_augmented_environ(const char *const *vars)
1177 char **env = copy_environ();
1179 while (*vars)
1180 env = env_setenv(env, *vars++);
1181 return env;
1184 #undef getenv
1187 * The system's getenv looks up the name in a case-insensitive manner.
1188 * This version tries a case-sensitive lookup and falls back to
1189 * case-insensitive if nothing was found. This is necessary because,
1190 * as a prominent example, CMD sets 'Path', but not 'PATH'.
1191 * Warning: not thread-safe.
1193 static char *getenv_cs(const char *name)
1195 size_t len = strlen(name);
1196 int i = lookup_env(environ, name, len);
1197 if (i >= 0)
1198 return environ[i] + len + 1; /* skip past name and '=' */
1199 return getenv(name);
1202 char *mingw_getenv(const char *name)
1204 char *result = getenv_cs(name);
1205 if (!result && !strcmp(name, "TMPDIR")) {
1206 /* on Windows it is TMP and TEMP */
1207 result = getenv_cs("TMP");
1208 if (!result)
1209 result = getenv_cs("TEMP");
1211 else if (!result && !strcmp(name, "TERM")) {
1212 /* simulate TERM to enable auto-color (see color.c) */
1213 result = "winansi";
1215 return result;
1219 * Note, this isn't a complete replacement for getaddrinfo. It assumes
1220 * that service contains a numerical port, or that it is null. It
1221 * does a simple search using gethostbyname, and returns one IPv4 host
1222 * if one was found.
1224 static int WSAAPI getaddrinfo_stub(const char *node, const char *service,
1225 const struct addrinfo *hints,
1226 struct addrinfo **res)
1228 struct hostent *h = NULL;
1229 struct addrinfo *ai;
1230 struct sockaddr_in *sin;
1232 if (node) {
1233 h = gethostbyname(node);
1234 if (!h)
1235 return WSAGetLastError();
1238 ai = xmalloc(sizeof(struct addrinfo));
1239 *res = ai;
1240 ai->ai_flags = 0;
1241 ai->ai_family = AF_INET;
1242 ai->ai_socktype = hints ? hints->ai_socktype : 0;
1243 switch (ai->ai_socktype) {
1244 case SOCK_STREAM:
1245 ai->ai_protocol = IPPROTO_TCP;
1246 break;
1247 case SOCK_DGRAM:
1248 ai->ai_protocol = IPPROTO_UDP;
1249 break;
1250 default:
1251 ai->ai_protocol = 0;
1252 break;
1254 ai->ai_addrlen = sizeof(struct sockaddr_in);
1255 if (hints && (hints->ai_flags & AI_CANONNAME))
1256 ai->ai_canonname = h ? strdup(h->h_name) : NULL;
1257 else
1258 ai->ai_canonname = NULL;
1260 sin = xmalloc(ai->ai_addrlen);
1261 memset(sin, 0, ai->ai_addrlen);
1262 sin->sin_family = AF_INET;
1263 /* Note: getaddrinfo is supposed to allow service to be a string,
1264 * which should be looked up using getservbyname. This is
1265 * currently not implemented */
1266 if (service)
1267 sin->sin_port = htons(atoi(service));
1268 if (h)
1269 sin->sin_addr = *(struct in_addr *)h->h_addr;
1270 else if (hints && (hints->ai_flags & AI_PASSIVE))
1271 sin->sin_addr.s_addr = INADDR_ANY;
1272 else
1273 sin->sin_addr.s_addr = INADDR_LOOPBACK;
1274 ai->ai_addr = (struct sockaddr *)sin;
1275 ai->ai_next = 0;
1276 return 0;
1279 static void WSAAPI freeaddrinfo_stub(struct addrinfo *res)
1281 free(res->ai_canonname);
1282 free(res->ai_addr);
1283 free(res);
1286 static int WSAAPI getnameinfo_stub(const struct sockaddr *sa, socklen_t salen,
1287 char *host, DWORD hostlen,
1288 char *serv, DWORD servlen, int flags)
1290 const struct sockaddr_in *sin = (const struct sockaddr_in *)sa;
1291 if (sa->sa_family != AF_INET)
1292 return EAI_FAMILY;
1293 if (!host && !serv)
1294 return EAI_NONAME;
1296 if (host && hostlen > 0) {
1297 struct hostent *ent = NULL;
1298 if (!(flags & NI_NUMERICHOST))
1299 ent = gethostbyaddr((const char *)&sin->sin_addr,
1300 sizeof(sin->sin_addr), AF_INET);
1302 if (ent)
1303 snprintf(host, hostlen, "%s", ent->h_name);
1304 else if (flags & NI_NAMEREQD)
1305 return EAI_NONAME;
1306 else
1307 snprintf(host, hostlen, "%s", inet_ntoa(sin->sin_addr));
1310 if (serv && servlen > 0) {
1311 struct servent *ent = NULL;
1312 if (!(flags & NI_NUMERICSERV))
1313 ent = getservbyport(sin->sin_port,
1314 flags & NI_DGRAM ? "udp" : "tcp");
1316 if (ent)
1317 snprintf(serv, servlen, "%s", ent->s_name);
1318 else
1319 snprintf(serv, servlen, "%d", ntohs(sin->sin_port));
1322 return 0;
1325 static HMODULE ipv6_dll = NULL;
1326 static void (WSAAPI *ipv6_freeaddrinfo)(struct addrinfo *res);
1327 static int (WSAAPI *ipv6_getaddrinfo)(const char *node, const char *service,
1328 const struct addrinfo *hints,
1329 struct addrinfo **res);
1330 static int (WSAAPI *ipv6_getnameinfo)(const struct sockaddr *sa, socklen_t salen,
1331 char *host, DWORD hostlen,
1332 char *serv, DWORD servlen, int flags);
1334 * gai_strerror is an inline function in the ws2tcpip.h header, so we
1335 * don't need to try to load that one dynamically.
1338 static void socket_cleanup(void)
1340 WSACleanup();
1341 if (ipv6_dll)
1342 FreeLibrary(ipv6_dll);
1343 ipv6_dll = NULL;
1344 ipv6_freeaddrinfo = freeaddrinfo_stub;
1345 ipv6_getaddrinfo = getaddrinfo_stub;
1346 ipv6_getnameinfo = getnameinfo_stub;
1349 static void ensure_socket_initialization(void)
1351 WSADATA wsa;
1352 static int initialized = 0;
1353 const char *libraries[] = { "ws2_32.dll", "wship6.dll", NULL };
1354 const char **name;
1356 if (initialized)
1357 return;
1359 if (WSAStartup(MAKEWORD(2,2), &wsa))
1360 die("unable to initialize winsock subsystem, error %d",
1361 WSAGetLastError());
1363 for (name = libraries; *name; name++) {
1364 ipv6_dll = LoadLibrary(*name);
1365 if (!ipv6_dll)
1366 continue;
1368 ipv6_freeaddrinfo = (void (WSAAPI *)(struct addrinfo *))
1369 GetProcAddress(ipv6_dll, "freeaddrinfo");
1370 ipv6_getaddrinfo = (int (WSAAPI *)(const char *, const char *,
1371 const struct addrinfo *,
1372 struct addrinfo **))
1373 GetProcAddress(ipv6_dll, "getaddrinfo");
1374 ipv6_getnameinfo = (int (WSAAPI *)(const struct sockaddr *,
1375 socklen_t, char *, DWORD,
1376 char *, DWORD, int))
1377 GetProcAddress(ipv6_dll, "getnameinfo");
1378 if (!ipv6_freeaddrinfo || !ipv6_getaddrinfo || !ipv6_getnameinfo) {
1379 FreeLibrary(ipv6_dll);
1380 ipv6_dll = NULL;
1381 } else
1382 break;
1384 if (!ipv6_freeaddrinfo || !ipv6_getaddrinfo || !ipv6_getnameinfo) {
1385 ipv6_freeaddrinfo = freeaddrinfo_stub;
1386 ipv6_getaddrinfo = getaddrinfo_stub;
1387 ipv6_getnameinfo = getnameinfo_stub;
1390 atexit(socket_cleanup);
1391 initialized = 1;
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, unsigned 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;
1830 const char *get_windows_home_directory(void)
1832 static const char *home_directory = NULL;
1833 struct strbuf buf = STRBUF_INIT;
1835 if (home_directory)
1836 return home_directory;
1838 home_directory = getenv("HOME");
1839 if (home_directory && *home_directory)
1840 return home_directory;
1842 strbuf_addf(&buf, "%s/%s", getenv("HOMEDRIVE"), getenv("HOMEPATH"));
1843 home_directory = strbuf_detach(&buf, NULL);
1845 return home_directory;
1848 int mingw_offset_1st_component(const char *path)
1850 int offset = 0;
1851 if (has_dos_drive_prefix(path))
1852 offset = 2;
1854 /* unc paths */
1855 else if (is_dir_sep(path[0]) && is_dir_sep(path[1])) {
1857 /* skip server name */
1858 char *pos = strpbrk(path + 2, "\\/");
1859 if (!pos)
1860 return 0; /* Error: malformed unc path */
1862 do {
1863 pos++;
1864 } while (*pos && !is_dir_sep(*pos));
1866 offset = pos - path;
1869 return offset + is_dir_sep(path[offset]);