Win32: move environment functions
[git/dscho.git] / compat / mingw.c
blobbaf5f9242a06681f222cf645971c32577078f827
1 #include "../git-compat-util.h"
2 #include "win32.h"
3 #include <conio.h>
4 #include <wchar.h>
5 #include "../strbuf.h"
6 #include "../run-command.h"
7 #include "../cache.h"
9 static const int delay[] = { 0, 1, 10, 20, 40 };
10 unsigned int _CRT_fmode = _O_BINARY;
12 int err_win_to_posix(DWORD winerr)
14 int error = ENOSYS;
15 switch(winerr) {
16 case ERROR_ACCESS_DENIED: error = EACCES; break;
17 case ERROR_ACCOUNT_DISABLED: error = EACCES; break;
18 case ERROR_ACCOUNT_RESTRICTION: error = EACCES; break;
19 case ERROR_ALREADY_ASSIGNED: error = EBUSY; break;
20 case ERROR_ALREADY_EXISTS: error = EEXIST; break;
21 case ERROR_ARITHMETIC_OVERFLOW: error = ERANGE; break;
22 case ERROR_BAD_COMMAND: error = EIO; break;
23 case ERROR_BAD_DEVICE: error = ENODEV; break;
24 case ERROR_BAD_DRIVER_LEVEL: error = ENXIO; break;
25 case ERROR_BAD_EXE_FORMAT: error = ENOEXEC; break;
26 case ERROR_BAD_FORMAT: error = ENOEXEC; break;
27 case ERROR_BAD_LENGTH: error = EINVAL; break;
28 case ERROR_BAD_PATHNAME: error = ENOENT; break;
29 case ERROR_BAD_PIPE: error = EPIPE; break;
30 case ERROR_BAD_UNIT: error = ENODEV; break;
31 case ERROR_BAD_USERNAME: error = EINVAL; break;
32 case ERROR_BROKEN_PIPE: error = EPIPE; break;
33 case ERROR_BUFFER_OVERFLOW: error = ENAMETOOLONG; break;
34 case ERROR_BUSY: error = EBUSY; break;
35 case ERROR_BUSY_DRIVE: error = EBUSY; break;
36 case ERROR_CALL_NOT_IMPLEMENTED: error = ENOSYS; break;
37 case ERROR_CANNOT_MAKE: error = EACCES; break;
38 case ERROR_CANTOPEN: error = EIO; break;
39 case ERROR_CANTREAD: error = EIO; break;
40 case ERROR_CANTWRITE: error = EIO; break;
41 case ERROR_CRC: error = EIO; break;
42 case ERROR_CURRENT_DIRECTORY: error = EACCES; break;
43 case ERROR_DEVICE_IN_USE: error = EBUSY; break;
44 case ERROR_DEV_NOT_EXIST: error = ENODEV; break;
45 case ERROR_DIRECTORY: error = EINVAL; break;
46 case ERROR_DIR_NOT_EMPTY: error = ENOTEMPTY; break;
47 case ERROR_DISK_CHANGE: error = EIO; break;
48 case ERROR_DISK_FULL: error = ENOSPC; break;
49 case ERROR_DRIVE_LOCKED: error = EBUSY; break;
50 case ERROR_ENVVAR_NOT_FOUND: error = EINVAL; break;
51 case ERROR_EXE_MARKED_INVALID: error = ENOEXEC; break;
52 case ERROR_FILENAME_EXCED_RANGE: error = ENAMETOOLONG; break;
53 case ERROR_FILE_EXISTS: error = EEXIST; break;
54 case ERROR_FILE_INVALID: error = ENODEV; break;
55 case ERROR_FILE_NOT_FOUND: error = ENOENT; break;
56 case ERROR_GEN_FAILURE: error = EIO; break;
57 case ERROR_HANDLE_DISK_FULL: error = ENOSPC; break;
58 case ERROR_INSUFFICIENT_BUFFER: error = ENOMEM; break;
59 case ERROR_INVALID_ACCESS: error = EACCES; break;
60 case ERROR_INVALID_ADDRESS: error = EFAULT; break;
61 case ERROR_INVALID_BLOCK: error = EFAULT; break;
62 case ERROR_INVALID_DATA: error = EINVAL; break;
63 case ERROR_INVALID_DRIVE: error = ENODEV; break;
64 case ERROR_INVALID_EXE_SIGNATURE: error = ENOEXEC; break;
65 case ERROR_INVALID_FLAGS: error = EINVAL; break;
66 case ERROR_INVALID_FUNCTION: error = ENOSYS; break;
67 case ERROR_INVALID_HANDLE: error = EBADF; break;
68 case ERROR_INVALID_LOGON_HOURS: error = EACCES; break;
69 case ERROR_INVALID_NAME: error = EINVAL; break;
70 case ERROR_INVALID_OWNER: error = EINVAL; break;
71 case ERROR_INVALID_PARAMETER: error = EINVAL; break;
72 case ERROR_INVALID_PASSWORD: error = EPERM; break;
73 case ERROR_INVALID_PRIMARY_GROUP: error = EINVAL; break;
74 case ERROR_INVALID_SIGNAL_NUMBER: error = EINVAL; break;
75 case ERROR_INVALID_TARGET_HANDLE: error = EIO; break;
76 case ERROR_INVALID_WORKSTATION: error = EACCES; break;
77 case ERROR_IO_DEVICE: error = EIO; break;
78 case ERROR_IO_INCOMPLETE: error = EINTR; break;
79 case ERROR_LOCKED: error = EBUSY; break;
80 case ERROR_LOCK_VIOLATION: error = EACCES; break;
81 case ERROR_LOGON_FAILURE: error = EACCES; break;
82 case ERROR_MAPPED_ALIGNMENT: error = EINVAL; break;
83 case ERROR_META_EXPANSION_TOO_LONG: error = E2BIG; break;
84 case ERROR_MORE_DATA: error = EPIPE; break;
85 case ERROR_NEGATIVE_SEEK: error = ESPIPE; break;
86 case ERROR_NOACCESS: error = EFAULT; break;
87 case ERROR_NONE_MAPPED: error = EINVAL; break;
88 case ERROR_NOT_ENOUGH_MEMORY: error = ENOMEM; break;
89 case ERROR_NOT_READY: error = EAGAIN; break;
90 case ERROR_NOT_SAME_DEVICE: error = EXDEV; break;
91 case ERROR_NO_DATA: error = EPIPE; break;
92 case ERROR_NO_MORE_SEARCH_HANDLES: error = EIO; break;
93 case ERROR_NO_PROC_SLOTS: error = EAGAIN; break;
94 case ERROR_NO_SUCH_PRIVILEGE: error = EACCES; break;
95 case ERROR_OPEN_FAILED: error = EIO; break;
96 case ERROR_OPEN_FILES: error = EBUSY; break;
97 case ERROR_OPERATION_ABORTED: error = EINTR; break;
98 case ERROR_OUTOFMEMORY: error = ENOMEM; break;
99 case ERROR_PASSWORD_EXPIRED: error = EACCES; break;
100 case ERROR_PATH_BUSY: error = EBUSY; break;
101 case ERROR_PATH_NOT_FOUND: error = ENOENT; break;
102 case ERROR_PIPE_BUSY: error = EBUSY; break;
103 case ERROR_PIPE_CONNECTED: error = EPIPE; break;
104 case ERROR_PIPE_LISTENING: error = EPIPE; break;
105 case ERROR_PIPE_NOT_CONNECTED: error = EPIPE; break;
106 case ERROR_PRIVILEGE_NOT_HELD: error = EACCES; break;
107 case ERROR_READ_FAULT: error = EIO; break;
108 case ERROR_SEEK: error = EIO; break;
109 case ERROR_SEEK_ON_DEVICE: error = ESPIPE; break;
110 case ERROR_SHARING_BUFFER_EXCEEDED: error = ENFILE; break;
111 case ERROR_SHARING_VIOLATION: error = EACCES; break;
112 case ERROR_STACK_OVERFLOW: error = ENOMEM; break;
113 case ERROR_SWAPERROR: error = ENOENT; break;
114 case ERROR_TOO_MANY_MODULES: error = EMFILE; break;
115 case ERROR_TOO_MANY_OPEN_FILES: error = EMFILE; break;
116 case ERROR_UNRECOGNIZED_MEDIA: error = ENXIO; break;
117 case ERROR_UNRECOGNIZED_VOLUME: error = ENODEV; break;
118 case ERROR_WAIT_NO_CHILDREN: error = ECHILD; break;
119 case ERROR_WRITE_FAULT: error = EIO; break;
120 case ERROR_WRITE_PROTECT: error = EROFS; break;
122 return error;
125 static inline int is_file_in_use_error(DWORD errcode)
127 switch (errcode) {
128 case ERROR_SHARING_VIOLATION:
129 case ERROR_ACCESS_DENIED:
130 return 1;
133 return 0;
136 static int read_yes_no_answer(void)
138 char answer[1024];
140 if (fgets(answer, sizeof(answer), stdin)) {
141 size_t answer_len = strlen(answer);
142 int got_full_line = 0, c;
144 /* remove the newline */
145 if (answer_len >= 2 && answer[answer_len-2] == '\r') {
146 answer[answer_len-2] = '\0';
147 got_full_line = 1;
148 } else if (answer_len >= 1 && answer[answer_len-1] == '\n') {
149 answer[answer_len-1] = '\0';
150 got_full_line = 1;
152 /* flush the buffer in case we did not get the full line */
153 if (!got_full_line)
154 while ((c = getchar()) != EOF && c != '\n')
156 } else
157 /* we could not read, return the
158 * default answer which is no */
159 return 0;
161 if (tolower(answer[0]) == 'y' && !answer[1])
162 return 1;
163 if (!strncasecmp(answer, "yes", sizeof(answer)))
164 return 1;
165 if (tolower(answer[0]) == 'n' && !answer[1])
166 return 0;
167 if (!strncasecmp(answer, "no", sizeof(answer)))
168 return 0;
170 /* did not find an answer we understand */
171 return -1;
174 static int ask_yes_no_if_possible(const char *format, ...)
176 char question[4096];
177 const char *retry_hook[] = { NULL, NULL, NULL };
178 va_list args;
180 va_start(args, format);
181 vsnprintf(question, sizeof(question), format, args);
182 va_end(args);
184 if ((retry_hook[0] = getenv("GIT_ASK_YESNO"))) {
185 retry_hook[1] = question;
186 return !run_command_v_opt(retry_hook, 0);
189 if (!isatty(_fileno(stdin)) || !isatty(_fileno(stderr)))
190 return 0;
192 while (1) {
193 int answer;
194 fprintf(stderr, "%s (y/n) ", question);
196 if ((answer = read_yes_no_answer()) >= 0)
197 return answer;
199 fprintf(stderr, "Sorry, I did not understand your answer. "
200 "Please type 'y' or 'n'\n");
204 int mingw_unlink(const char *pathname)
206 int ret, tries = 0;
207 wchar_t wpathname[MAX_PATH];
208 if (xutftowcs_path(wpathname, pathname) < 0)
209 return -1;
211 /* read-only files cannot be removed */
212 _wchmod(wpathname, 0666);
213 while ((ret = _wunlink(wpathname)) == -1 && tries < ARRAY_SIZE(delay)) {
214 if (!is_file_in_use_error(GetLastError()))
215 break;
217 * We assume that some other process had the source or
218 * destination file open at the wrong moment and retry.
219 * In order to give the other process a higher chance to
220 * complete its operation, we give up our time slice now.
221 * If we have to retry again, we do sleep a bit.
223 Sleep(delay[tries]);
224 tries++;
226 while (ret == -1 && is_file_in_use_error(GetLastError()) &&
227 ask_yes_no_if_possible("Unlink of file '%s' failed. "
228 "Should I try again?", pathname))
229 ret = _wunlink(wpathname);
230 return ret;
233 static int is_dir_empty(const wchar_t *wpath)
235 WIN32_FIND_DATAW findbuf;
236 HANDLE handle;
237 wchar_t wbuf[MAX_PATH + 2];
238 wcscpy(wbuf, wpath);
239 wcscat(wbuf, L"\\*");
240 handle = FindFirstFileW(wbuf, &findbuf);
241 if (handle == INVALID_HANDLE_VALUE)
242 return GetLastError() == ERROR_NO_MORE_FILES;
244 while (!wcscmp(findbuf.cFileName, L".") ||
245 !wcscmp(findbuf.cFileName, L".."))
246 if (!FindNextFileW(handle, &findbuf))
247 return GetLastError() == ERROR_NO_MORE_FILES;
248 FindClose(handle);
249 return 0;
252 int mingw_rmdir(const char *pathname)
254 int ret, tries = 0;
255 wchar_t wpathname[MAX_PATH];
256 if (xutftowcs_path(wpathname, pathname) < 0)
257 return -1;
259 while ((ret = _wrmdir(wpathname)) == -1 && tries < ARRAY_SIZE(delay)) {
260 if (!is_file_in_use_error(GetLastError()))
261 break;
262 if (!is_dir_empty(wpathname)) {
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 = _wrmdir(wpathname);
280 return ret;
283 static int make_hidden(const wchar_t *path)
285 DWORD attribs = GetFileAttributesW(path);
286 if (SetFileAttributesW(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 wchar_t wdir[MAX_PATH];
295 if (hide_dotfiles != HIDE_DOTFILES_FALSE && !is_bare_repository())
296 if (xutftowcs_path(wdir, dir) < 0 || make_hidden(wdir))
297 warning("Failed to make '%s' hidden", dir);
298 git_config_set("core.hideDotFiles",
299 hide_dotfiles == HIDE_DOTFILES_FALSE ? "false" :
300 (hide_dotfiles == HIDE_DOTFILES_DOTGITONLY ?
301 "dotGitOnly" : "true"));
304 int mingw_mkdir(const char *path, int mode)
306 int ret;
307 wchar_t wpath[MAX_PATH];
308 if (xutftowcs_path(wpath, path) < 0)
309 return -1;
310 ret = _wmkdir(wpath);
311 if (!ret && hide_dotfiles == HIDE_DOTFILES_TRUE) {
313 * In Windows a file or dir starting with a dot is not
314 * automatically hidden. So lets mark it as hidden when
315 * such a directory is created.
317 const char *start = basename((char*)path);
318 if (*start == '.')
319 return make_hidden(wpath);
321 return ret;
324 int mingw_open (const char *filename, int oflags, ...)
326 va_list args;
327 unsigned mode;
328 int fd;
329 wchar_t wfilename[MAX_PATH];
331 va_start(args, oflags);
332 mode = va_arg(args, int);
333 va_end(args);
335 if (filename && !strcmp(filename, "/dev/null"))
336 filename = "nul";
338 if (xutftowcs_path(wfilename, filename) < 0)
339 return -1;
340 fd = _wopen(wfilename, oflags, mode);
342 if (fd < 0 && (oflags & O_CREAT) && errno == EACCES) {
343 DWORD attrs = GetFileAttributesW(wfilename);
344 if (attrs != INVALID_FILE_ATTRIBUTES && (attrs & FILE_ATTRIBUTE_DIRECTORY))
345 errno = EISDIR;
347 if ((oflags & O_CREAT) && fd >= 0 &&
348 hide_dotfiles == HIDE_DOTFILES_TRUE) {
350 * In Windows a file or dir starting with a dot is not
351 * automatically hidden. So lets mark it as hidden when
352 * such a file is created.
354 const char *start = basename((char*)filename);
355 if (*start == '.' && make_hidden(wfilename))
356 warning("Could not mark '%s' as hidden.", filename);
358 return fd;
361 #undef write
362 ssize_t mingw_write(int fd, const void *buf, size_t count)
365 * While write() calls to a file on a local disk are translated
366 * into WriteFile() calls with a maximum size of 64KB on Windows
367 * XP and 256KB on Vista, no such cap is placed on writes to
368 * files over the network on Windows XP. Unfortunately, there
369 * seems to be a limit of 32MB-28KB on X64 and 64MB-32KB on x86;
370 * bigger writes fail on Windows XP.
371 * So we cap to a nice 31MB here to avoid write failures over
372 * the net without changing the number of WriteFile() calls in
373 * the local case.
375 return write(fd, buf, min(count, 31 * 1024 * 1024));
378 FILE *mingw_fopen (const char *filename, const char *otype)
380 int hide = 0;
381 FILE *file;
382 wchar_t wfilename[MAX_PATH], wotype[4];
383 if (hide_dotfiles == HIDE_DOTFILES_TRUE &&
384 basename((char*)filename)[0] == '.')
385 hide = access(filename, F_OK);
386 if (filename && !strcmp(filename, "/dev/null"))
387 filename = "nul";
388 if (xutftowcs_path(wfilename, filename) < 0 ||
389 xutftowcs(wotype, otype, ARRAY_SIZE(wotype)) < 0)
390 return NULL;
391 file = _wfopen(wfilename, wotype);
392 if (file && hide && make_hidden(wfilename))
393 warning("Could not mark '%s' as hidden.", filename);
394 return file;
397 FILE *mingw_freopen (const char *filename, const char *otype, FILE *stream)
399 int hide = 0;
400 FILE *file;
401 wchar_t wfilename[MAX_PATH], wotype[4];
402 if (hide_dotfiles == HIDE_DOTFILES_TRUE &&
403 basename((char*)filename)[0] == '.')
404 hide = access(filename, F_OK);
405 if (filename && !strcmp(filename, "/dev/null"))
406 filename = "nul";
407 if (xutftowcs_path(wfilename, filename) < 0 ||
408 xutftowcs(wotype, otype, ARRAY_SIZE(wotype)) < 0)
409 return NULL;
410 file = _wfreopen(wfilename, wotype, stream);
411 if (file && hide && make_hidden(wfilename))
412 warning("Could not mark '%s' as hidden.", filename);
413 return file;
416 int mingw_access(const char *filename, int mode)
418 wchar_t wfilename[MAX_PATH];
419 if (xutftowcs_path(wfilename, filename) < 0)
420 return -1;
421 /* X_OK is not supported by the MSVCRT version */
422 return _waccess(wfilename, mode & ~X_OK);
425 int mingw_chdir(const char *dirname)
427 wchar_t wdirname[MAX_PATH];
428 if (xutftowcs_path(wdirname, dirname) < 0)
429 return -1;
430 return _wchdir(wdirname);
433 int mingw_chmod(const char *filename, int mode)
435 wchar_t wfilename[MAX_PATH];
436 if (xutftowcs_path(wfilename, filename) < 0)
437 return -1;
438 return _wchmod(wfilename, mode);
442 * The unit of FILETIME is 100-nanoseconds since January 1, 1601, UTC.
443 * Returns the 100-nanoseconds ("hekto nanoseconds") since the epoch.
445 static inline long long filetime_to_hnsec(const FILETIME *ft)
447 long long winTime = ((long long)ft->dwHighDateTime << 32) + ft->dwLowDateTime;
448 /* Windows to Unix Epoch conversion */
449 return winTime - 116444736000000000LL;
452 static inline time_t filetime_to_time_t(const FILETIME *ft)
454 return (time_t)(filetime_to_hnsec(ft) / 10000000);
457 /* We keep the do_lstat code in a separate function to avoid recursion.
458 * When a path ends with a slash, the stat will fail with ENOENT. In
459 * this case, we strip the trailing slashes and stat again.
461 * If follow is true then act like stat() and report on the link
462 * target. Otherwise report on the link itself.
464 static int do_lstat(int follow, const char *file_name, struct stat *buf)
466 WIN32_FILE_ATTRIBUTE_DATA fdata;
467 wchar_t wfilename[MAX_PATH];
468 if (xutftowcs_path(wfilename, file_name) < 0)
469 return -1;
471 if (GetFileAttributesExW(wfilename, GetFileExInfoStandard, &fdata)) {
472 buf->st_ino = 0;
473 buf->st_gid = 0;
474 buf->st_uid = 0;
475 buf->st_nlink = 1;
476 buf->st_mode = file_attr_to_st_mode(fdata.dwFileAttributes);
477 buf->st_size = fdata.nFileSizeLow |
478 (((off_t)fdata.nFileSizeHigh)<<32);
479 buf->st_dev = buf->st_rdev = 0; /* not used by Git */
480 buf->st_atime = filetime_to_time_t(&(fdata.ftLastAccessTime));
481 buf->st_mtime = filetime_to_time_t(&(fdata.ftLastWriteTime));
482 buf->st_ctime = filetime_to_time_t(&(fdata.ftCreationTime));
483 if (fdata.dwFileAttributes & FILE_ATTRIBUTE_REPARSE_POINT) {
484 WIN32_FIND_DATAW findbuf;
485 HANDLE handle = FindFirstFileW(wfilename, &findbuf);
486 if (handle != INVALID_HANDLE_VALUE) {
487 if ((findbuf.dwFileAttributes & FILE_ATTRIBUTE_REPARSE_POINT) &&
488 (findbuf.dwReserved0 == IO_REPARSE_TAG_SYMLINK)) {
489 if (follow) {
490 char buffer[MAXIMUM_REPARSE_DATA_BUFFER_SIZE];
491 buf->st_size = readlink(file_name, buffer, MAXIMUM_REPARSE_DATA_BUFFER_SIZE);
492 } else {
493 buf->st_mode = S_IFLNK;
495 buf->st_mode |= S_IREAD;
496 if (!(findbuf.dwFileAttributes & FILE_ATTRIBUTE_READONLY))
497 buf->st_mode |= S_IWRITE;
499 FindClose(handle);
502 return 0;
504 switch (GetLastError()) {
505 case ERROR_ACCESS_DENIED:
506 case ERROR_SHARING_VIOLATION:
507 case ERROR_LOCK_VIOLATION:
508 case ERROR_SHARING_BUFFER_EXCEEDED:
509 errno = EACCES;
510 break;
511 case ERROR_BUFFER_OVERFLOW:
512 errno = ENAMETOOLONG;
513 break;
514 case ERROR_NOT_ENOUGH_MEMORY:
515 errno = ENOMEM;
516 break;
517 default:
518 errno = ENOENT;
519 break;
521 return -1;
524 /* We provide our own lstat/fstat functions, since the provided
525 * lstat/fstat functions are so slow. These stat functions are
526 * tailored for Git's usage (read: fast), and are not meant to be
527 * complete. Note that Git stat()s are redirected to mingw_lstat()
528 * too, since Windows doesn't really handle symlinks that well.
530 static int do_stat_internal(int follow, const char *file_name, struct stat *buf)
532 int namelen;
533 char alt_name[PATH_MAX];
535 if (!do_lstat(follow, file_name, buf))
536 return 0;
538 /* if file_name ended in a '/', Windows returned ENOENT;
539 * try again without trailing slashes
541 if (errno != ENOENT)
542 return -1;
544 namelen = strlen(file_name);
545 if (namelen && file_name[namelen-1] != '/')
546 return -1;
547 while (namelen && file_name[namelen-1] == '/')
548 --namelen;
549 if (!namelen || namelen >= PATH_MAX)
550 return -1;
552 memcpy(alt_name, file_name, namelen);
553 alt_name[namelen] = 0;
554 return do_lstat(follow, alt_name, buf);
557 int mingw_lstat(const char *file_name, struct stat *buf)
559 return do_stat_internal(0, file_name, buf);
561 int mingw_stat(const char *file_name, struct stat *buf)
563 return do_stat_internal(1, file_name, buf);
566 #undef fstat
567 int mingw_fstat(int fd, struct stat *buf)
569 HANDLE fh = (HANDLE)_get_osfhandle(fd);
570 BY_HANDLE_FILE_INFORMATION fdata;
572 if (fh == INVALID_HANDLE_VALUE) {
573 errno = EBADF;
574 return -1;
576 /* direct non-file handles to MS's fstat() */
577 if (GetFileType(fh) != FILE_TYPE_DISK)
578 return _fstati64(fd, buf);
580 if (GetFileInformationByHandle(fh, &fdata)) {
581 buf->st_ino = 0;
582 buf->st_gid = 0;
583 buf->st_uid = 0;
584 buf->st_nlink = 1;
585 buf->st_mode = file_attr_to_st_mode(fdata.dwFileAttributes);
586 buf->st_size = fdata.nFileSizeLow |
587 (((off_t)fdata.nFileSizeHigh)<<32);
588 buf->st_dev = buf->st_rdev = 0; /* not used by Git */
589 buf->st_atime = filetime_to_time_t(&(fdata.ftLastAccessTime));
590 buf->st_mtime = filetime_to_time_t(&(fdata.ftLastWriteTime));
591 buf->st_ctime = filetime_to_time_t(&(fdata.ftCreationTime));
592 return 0;
594 errno = EBADF;
595 return -1;
598 static inline void time_t_to_filetime(time_t t, FILETIME *ft)
600 long long winTime = t * 10000000LL + 116444736000000000LL;
601 ft->dwLowDateTime = winTime;
602 ft->dwHighDateTime = winTime >> 32;
605 int mingw_utime (const char *file_name, const struct utimbuf *times)
607 FILETIME mft, aft;
608 int fh, rc;
609 DWORD attrs;
610 wchar_t wfilename[MAX_PATH];
611 if (xutftowcs_path(wfilename, file_name) < 0)
612 return -1;
614 /* must have write permission */
615 attrs = GetFileAttributesW(wfilename);
616 if (attrs != INVALID_FILE_ATTRIBUTES &&
617 (attrs & FILE_ATTRIBUTE_READONLY)) {
618 /* ignore errors here; open() will report them */
619 SetFileAttributesW(wfilename, attrs & ~FILE_ATTRIBUTE_READONLY);
622 if ((fh = _wopen(wfilename, O_RDWR | O_BINARY)) < 0) {
623 rc = -1;
624 goto revert_attrs;
627 if (times) {
628 time_t_to_filetime(times->modtime, &mft);
629 time_t_to_filetime(times->actime, &aft);
630 } else {
631 GetSystemTimeAsFileTime(&mft);
632 aft = mft;
634 if (!SetFileTime((HANDLE)_get_osfhandle(fh), NULL, &aft, &mft)) {
635 errno = EINVAL;
636 rc = -1;
637 } else
638 rc = 0;
639 close(fh);
641 revert_attrs:
642 if (attrs != INVALID_FILE_ATTRIBUTES &&
643 (attrs & FILE_ATTRIBUTE_READONLY)) {
644 /* ignore errors again */
645 SetFileAttributesW(wfilename, attrs);
647 return rc;
650 unsigned int sleep (unsigned int seconds)
652 Sleep(seconds*1000);
653 return 0;
656 char *mingw_mktemp(char *template)
658 wchar_t wtemplate[MAX_PATH];
659 if (xutftowcs_path(wtemplate, template) < 0)
660 return NULL;
661 if (!_wmktemp(wtemplate))
662 return NULL;
663 if (xwcstoutf(template, wtemplate, strlen(template) + 1) < 0)
664 return NULL;
665 return template;
668 int mkstemp(char *template)
670 char *filename = mktemp(template);
671 if (filename == NULL)
672 return -1;
673 return open(filename, O_RDWR | O_CREAT, 0600);
676 int gettimeofday(struct timeval *tv, void *tz)
678 FILETIME ft;
679 long long hnsec;
681 GetSystemTimeAsFileTime(&ft);
682 hnsec = filetime_to_hnsec(&ft);
683 tv->tv_sec = hnsec / 10000000;
684 tv->tv_usec = (hnsec % 10000000) / 10;
685 return 0;
688 int pipe(int filedes[2])
690 HANDLE h[2];
692 /* this creates non-inheritable handles */
693 if (!CreatePipe(&h[0], &h[1], NULL, 8192)) {
694 errno = err_win_to_posix(GetLastError());
695 return -1;
697 filedes[0] = _open_osfhandle((int)h[0], O_NOINHERIT);
698 if (filedes[0] < 0) {
699 CloseHandle(h[0]);
700 CloseHandle(h[1]);
701 return -1;
703 filedes[1] = _open_osfhandle((int)h[1], O_NOINHERIT);
704 if (filedes[0] < 0) {
705 close(filedes[0]);
706 CloseHandle(h[1]);
707 return -1;
709 return 0;
712 struct tm *gmtime_r(const time_t *timep, struct tm *result)
714 /* gmtime() in MSVCRT.DLL is thread-safe, but not reentrant */
715 memcpy(result, gmtime(timep), sizeof(struct tm));
716 return result;
719 struct tm *localtime_r(const time_t *timep, struct tm *result)
721 /* localtime() in MSVCRT.DLL is thread-safe, but not reentrant */
722 memcpy(result, localtime(timep), sizeof(struct tm));
723 return result;
726 char *mingw_getcwd(char *pointer, int len)
728 int i;
729 wchar_t wpointer[MAX_PATH];
730 if (!_wgetcwd(wpointer, ARRAY_SIZE(wpointer)))
731 return NULL;
732 if (xwcstoutf(pointer, wpointer, len) < 0)
733 return NULL;
734 for (i = 0; pointer[i]; i++)
735 if (pointer[i] == '\\')
736 pointer[i] = '/';
737 return pointer;
740 static int env_compare(const void *a, const void *b)
742 char *const *ea = a;
743 char *const *eb = b;
744 return strcasecmp(*ea, *eb);
747 static int lookup_env(char **env, const char *name, size_t nmln)
749 int i;
751 for (i = 0; env[i]; i++) {
752 if (!strncasecmp(env[i], name, nmln) && '=' == env[i][nmln])
753 /* matches */
754 return i;
756 return -1;
760 * If name contains '=', then sets the variable, otherwise it unsets it
762 static char **env_setenv(char **env, const char *name)
764 char *eq = strchrnul(name, '=');
765 int i = lookup_env(env, name, eq-name);
767 if (i < 0) {
768 if (*eq) {
769 for (i = 0; env[i]; i++)
771 env = xrealloc(env, (i+2)*sizeof(*env));
772 env[i] = (char*) name;
773 env[i+1] = NULL;
776 else {
777 free(env[i]);
778 if (*eq)
779 env[i] = (char*) name;
780 else
781 for (; env[i]; i++)
782 env[i] = env[i+1];
784 return env;
787 #undef getenv
788 char *mingw_getenv(const char *name)
790 char *result = getenv(name);
791 if (!result && !strcmp(name, "TMPDIR")) {
792 /* on Windows it is TMP and TEMP */
793 result = getenv("TMP");
794 if (!result)
795 result = getenv("TEMP");
797 else if (!result && !strcmp(name, "TERM")) {
798 /* simulate TERM to enable auto-color (see color.c) */
799 result = "winansi";
801 return result;
804 int mingw_putenv(const char *namevalue)
806 environ = env_setenv(environ, namevalue);
807 return 0;
811 * See http://msdn2.microsoft.com/en-us/library/17w5ykft(vs.71).aspx
812 * (Parsing C++ Command-Line Arguments)
814 static const char *quote_arg(const char *arg)
816 /* count chars to quote */
817 int len = 0, n = 0;
818 int force_quotes = 0;
819 char *q, *d;
820 const char *p = arg;
821 if (!*p) force_quotes = 1;
822 while (*p) {
823 if (isspace(*p) || *p == '*' || *p == '?' || *p == '{' || *p == '\'')
824 force_quotes = 1;
825 else if (*p == '"')
826 n++;
827 else if (*p == '\\') {
828 int count = 0;
829 while (*p == '\\') {
830 count++;
831 p++;
832 len++;
834 if (*p == '"')
835 n += count*2 + 1;
836 continue;
838 len++;
839 p++;
841 if (!force_quotes && n == 0)
842 return arg;
844 /* insert \ where necessary */
845 d = q = xmalloc(len+n+3);
846 *d++ = '"';
847 while (*arg) {
848 if (*arg == '"')
849 *d++ = '\\';
850 else if (*arg == '\\') {
851 int count = 0;
852 while (*arg == '\\') {
853 count++;
854 *d++ = *arg++;
856 if (*arg == '"') {
857 while (count-- > 0)
858 *d++ = '\\';
859 *d++ = '\\';
862 *d++ = *arg++;
864 *d++ = '"';
865 *d++ = 0;
866 return q;
869 static const char *parse_interpreter(const char *cmd)
871 static char buf[100];
872 char *p, *opt;
873 int n, fd;
875 /* don't even try a .exe */
876 n = strlen(cmd);
877 if (n >= 4 && !strcasecmp(cmd+n-4, ".exe"))
878 return NULL;
880 fd = open(cmd, O_RDONLY);
881 if (fd < 0)
882 return NULL;
883 n = read(fd, buf, sizeof(buf)-1);
884 close(fd);
885 if (n < 4) /* at least '#!/x' and not error */
886 return NULL;
888 if (buf[0] != '#' || buf[1] != '!')
889 return NULL;
890 buf[n] = '\0';
891 p = buf + strcspn(buf, "\r\n");
892 if (!*p)
893 return NULL;
895 *p = '\0';
896 if (!(p = strrchr(buf+2, '/')) && !(p = strrchr(buf+2, '\\')))
897 return NULL;
898 /* strip options */
899 if ((opt = strchr(p+1, ' ')))
900 *opt = '\0';
901 return p+1;
905 * Splits the PATH into parts.
907 static char **get_path_split(void)
909 char *p, **path, *envpath = getenv("PATH");
910 int i, n = 0;
912 if (!envpath || !*envpath)
913 return NULL;
915 envpath = xstrdup(envpath);
916 p = envpath;
917 while (p) {
918 char *dir = p;
919 p = strchr(p, ';');
920 if (p) *p++ = '\0';
921 if (*dir) { /* not earlier, catches series of ; */
922 ++n;
925 if (!n)
926 return NULL;
928 path = xmalloc((n+1)*sizeof(char *));
929 p = envpath;
930 i = 0;
931 do {
932 if (*p)
933 path[i++] = xstrdup(p);
934 p = p+strlen(p)+1;
935 } while (i < n);
936 path[i] = NULL;
938 free(envpath);
940 return path;
943 static void free_path_split(char **path)
945 char **p = path;
947 if (!path)
948 return;
950 while (*p)
951 free(*p++);
952 free(path);
956 * exe_only means that we only want to detect .exe files, but not scripts
957 * (which do not have an extension)
959 static char *lookup_prog(const char *dir, const char *cmd, int isexe, int exe_only)
961 char path[MAX_PATH];
962 snprintf(path, sizeof(path), "%s\\%s.exe", dir, cmd);
964 if (!isexe && access(path, F_OK) == 0)
965 return xstrdup(path);
966 path[strlen(path)-4] = '\0';
967 if ((!exe_only || isexe) && access(path, F_OK) == 0)
968 if (!(GetFileAttributes(path) & FILE_ATTRIBUTE_DIRECTORY))
969 return xstrdup(path);
970 return NULL;
974 * Determines the absolute path of cmd using the split path in path.
975 * If cmd contains a slash or backslash, no lookup is performed.
977 static char *path_lookup(const char *cmd, char **path, int exe_only)
979 char *prog = NULL;
980 int len = strlen(cmd);
981 int isexe = len >= 4 && !strcasecmp(cmd+len-4, ".exe");
983 if (strchr(cmd, '/') || strchr(cmd, '\\'))
984 prog = xstrdup(cmd);
986 while (!prog && *path)
987 prog = lookup_prog(*path++, cmd, isexe, exe_only);
989 return prog;
992 struct pinfo_t {
993 struct pinfo_t *next;
994 pid_t pid;
995 HANDLE proc;
996 } pinfo_t;
997 struct pinfo_t *pinfo = NULL;
998 CRITICAL_SECTION pinfo_cs;
1000 static pid_t mingw_spawnve_fd(const char *cmd, const char **argv, char **env,
1001 const char *dir,
1002 int prepend_cmd, int fhin, int fhout, int fherr)
1004 STARTUPINFOW si;
1005 PROCESS_INFORMATION pi;
1006 struct strbuf args;
1007 wchar_t wcmd[MAX_PATH], wdir[MAX_PATH], *wargs, *wenvblk = NULL;
1008 unsigned flags = CREATE_UNICODE_ENVIRONMENT;
1009 BOOL ret;
1011 /* Determine whether or not we are associated to a console */
1012 HANDLE cons = CreateFile("CONOUT$", GENERIC_WRITE,
1013 FILE_SHARE_WRITE, NULL, OPEN_EXISTING,
1014 FILE_ATTRIBUTE_NORMAL, NULL);
1015 if (cons == INVALID_HANDLE_VALUE) {
1016 /* There is no console associated with this process.
1017 * Since the child is a console process, Windows
1018 * would normally create a console window. But
1019 * since we'll be redirecting std streams, we do
1020 * not need the console.
1021 * It is necessary to use DETACHED_PROCESS
1022 * instead of CREATE_NO_WINDOW to make ssh
1023 * recognize that it has no console.
1025 flags |= DETACHED_PROCESS;
1026 } else {
1027 /* There is already a console. If we specified
1028 * DETACHED_PROCESS here, too, Windows would
1029 * disassociate the child from the console.
1030 * The same is true for CREATE_NO_WINDOW.
1031 * Go figure!
1033 CloseHandle(cons);
1035 memset(&si, 0, sizeof(si));
1036 si.cb = sizeof(si);
1037 si.dwFlags = STARTF_USESTDHANDLES;
1038 si.hStdInput = winansi_get_osfhandle(fhin);
1039 si.hStdOutput = winansi_get_osfhandle(fhout);
1040 si.hStdError = winansi_get_osfhandle(fherr);
1042 if (xutftowcs_path(wcmd, cmd) < 0)
1043 return -1;
1044 if (dir && xutftowcs_path(wdir, dir) < 0)
1045 return -1;
1047 /* concatenate argv, quoting args as we go */
1048 strbuf_init(&args, 0);
1049 if (prepend_cmd) {
1050 char *quoted = (char *)quote_arg(cmd);
1051 strbuf_addstr(&args, quoted);
1052 if (quoted != cmd)
1053 free(quoted);
1055 for (; *argv; argv++) {
1056 char *quoted = (char *)quote_arg(*argv);
1057 if (*args.buf)
1058 strbuf_addch(&args, ' ');
1059 strbuf_addstr(&args, quoted);
1060 if (quoted != *argv)
1061 free(quoted);
1064 wargs = xmalloc((2 * args.len + 1) * sizeof(wchar_t));
1065 xutftowcs(wargs, args.buf, 2 * args.len + 1);
1066 strbuf_release(&args);
1068 if (env) {
1069 int count = 0;
1070 char **e, **sorted_env;
1071 int size = 0, wenvsz = 0, wenvpos = 0;
1073 for (e = env; *e; e++)
1074 count++;
1076 /* environment must be sorted */
1077 sorted_env = xmalloc(sizeof(*sorted_env) * (count + 1));
1078 memcpy(sorted_env, env, sizeof(*sorted_env) * (count + 1));
1079 qsort(sorted_env, count, sizeof(*sorted_env), env_compare);
1081 /* create environment block from temporary environment */
1082 for (e = sorted_env; *e; e++) {
1083 size = 2 * strlen(*e) + 2; /* +2 for final \0 */
1084 ALLOC_GROW(wenvblk, (wenvpos + size) * sizeof(wchar_t), wenvsz);
1085 wenvpos += xutftowcs(&wenvblk[wenvpos], *e, size) + 1;
1087 /* add final \0 terminator */
1088 wenvblk[wenvpos] = 0;
1089 free(sorted_env);
1092 memset(&pi, 0, sizeof(pi));
1093 ret = CreateProcessW(wcmd, wargs, NULL, NULL, TRUE, flags,
1094 wenvblk, dir ? wdir : NULL, &si, &pi);
1096 free(wenvblk);
1097 free(wargs);
1099 if (!ret) {
1100 errno = ENOENT;
1101 return -1;
1103 CloseHandle(pi.hThread);
1106 * The process ID is the human-readable identifier of the process
1107 * that we want to present in log and error messages. The handle
1108 * is not useful for this purpose. But we cannot close it, either,
1109 * because it is not possible to turn a process ID into a process
1110 * handle after the process terminated.
1111 * Keep the handle in a list for waitpid.
1113 EnterCriticalSection(&pinfo_cs);
1115 struct pinfo_t *info = xmalloc(sizeof(struct pinfo_t));
1116 info->pid = pi.dwProcessId;
1117 info->proc = pi.hProcess;
1118 info->next = pinfo;
1119 pinfo = info;
1121 LeaveCriticalSection(&pinfo_cs);
1123 return (pid_t)pi.dwProcessId;
1126 static pid_t mingw_spawnv(const char *cmd, const char **argv, int prepend_cmd)
1128 return mingw_spawnve_fd(cmd, argv, environ, NULL, prepend_cmd, 0, 1, 2);
1131 pid_t mingw_spawnvpe(const char *cmd, const char **argv, char **env,
1132 const char *dir,
1133 int fhin, int fhout, int fherr)
1135 pid_t pid;
1136 char **path = get_path_split();
1137 char *prog = path_lookup(cmd, path, 0);
1139 if (!prog) {
1140 errno = ENOENT;
1141 pid = -1;
1143 else {
1144 const char *interpr = parse_interpreter(prog);
1146 if (interpr) {
1147 const char *argv0 = argv[0];
1148 char *iprog = path_lookup(interpr, path, 1);
1149 argv[0] = prog;
1150 if (!iprog) {
1151 errno = ENOENT;
1152 pid = -1;
1154 else {
1155 pid = mingw_spawnve_fd(iprog, argv, env, dir, 1,
1156 fhin, fhout, fherr);
1157 free(iprog);
1159 argv[0] = argv0;
1161 else
1162 pid = mingw_spawnve_fd(prog, argv, env, dir, 0,
1163 fhin, fhout, fherr);
1164 free(prog);
1166 free_path_split(path);
1167 return pid;
1170 static int try_shell_exec(const char *cmd, char *const *argv)
1172 const char *interpr = parse_interpreter(cmd);
1173 char **path;
1174 char *prog;
1175 int pid = 0;
1177 if (!interpr)
1178 return 0;
1179 path = get_path_split();
1180 prog = path_lookup(interpr, path, 1);
1181 if (prog) {
1182 int argc = 0;
1183 const char **argv2;
1184 while (argv[argc]) argc++;
1185 argv2 = xmalloc(sizeof(*argv) * (argc+1));
1186 argv2[0] = (char *)cmd; /* full path to the script file */
1187 memcpy(&argv2[1], &argv[1], sizeof(*argv) * argc);
1188 pid = mingw_spawnv(prog, argv2, 1);
1189 if (pid >= 0) {
1190 int status;
1191 if (waitpid(pid, &status, 0) < 0)
1192 status = 255;
1193 exit(status);
1195 pid = 1; /* indicate that we tried but failed */
1196 free(prog);
1197 free(argv2);
1199 free_path_split(path);
1200 return pid;
1203 int mingw_execv(const char *cmd, char *const *argv)
1205 /* check if git_command is a shell script */
1206 if (!try_shell_exec(cmd, argv)) {
1207 int pid, status;
1209 pid = mingw_spawnv(cmd, (const char **)argv, 0);
1210 if (pid < 0)
1211 return -1;
1212 if (waitpid(pid, &status, 0) < 0)
1213 status = 255;
1214 exit(status);
1216 return -1;
1219 int mingw_execvp(const char *cmd, char *const *argv)
1221 char **path = get_path_split();
1222 char *prog = path_lookup(cmd, path, 0);
1224 if (prog) {
1225 mingw_execv(prog, argv);
1226 free(prog);
1227 } else
1228 errno = ENOENT;
1230 free_path_split(path);
1231 return -1;
1234 int mingw_kill(pid_t pid, int sig)
1236 if (pid > 0 && sig == SIGTERM) {
1237 HANDLE h = OpenProcess(PROCESS_TERMINATE, FALSE, pid);
1239 if (TerminateProcess(h, -1)) {
1240 CloseHandle(h);
1241 return 0;
1244 errno = err_win_to_posix(GetLastError());
1245 CloseHandle(h);
1246 return -1;
1249 errno = EINVAL;
1250 return -1;
1253 static char **copy_environ(void)
1255 char **env;
1256 int i = 0;
1257 while (environ[i])
1258 i++;
1259 env = xmalloc((i+1)*sizeof(*env));
1260 for (i = 0; environ[i]; i++)
1261 env[i] = xstrdup(environ[i]);
1262 env[i] = NULL;
1263 return env;
1266 void free_environ(char **env)
1268 int i;
1269 for (i = 0; env[i]; i++)
1270 free(env[i]);
1271 free(env);
1275 * Copies global environ and adjusts variables as specified by vars.
1277 char **make_augmented_environ(const char *const *vars)
1279 char **env = copy_environ();
1281 while (*vars) {
1282 const char *v = *vars++;
1283 env = env_setenv(env, strchr(v, '=') ? xstrdup(v) : v);
1285 return env;
1289 * Note, this isn't a complete replacement for getaddrinfo. It assumes
1290 * that service contains a numerical port, or that it is null. It
1291 * does a simple search using gethostbyname, and returns one IPv4 host
1292 * if one was found.
1294 static int WSAAPI getaddrinfo_stub(const char *node, const char *service,
1295 const struct addrinfo *hints,
1296 struct addrinfo **res)
1298 struct hostent *h = NULL;
1299 struct addrinfo *ai;
1300 struct sockaddr_in *sin;
1302 if (node) {
1303 h = gethostbyname(node);
1304 if (!h)
1305 return WSAGetLastError();
1308 ai = xmalloc(sizeof(struct addrinfo));
1309 *res = ai;
1310 ai->ai_flags = 0;
1311 ai->ai_family = AF_INET;
1312 ai->ai_socktype = hints ? hints->ai_socktype : 0;
1313 switch (ai->ai_socktype) {
1314 case SOCK_STREAM:
1315 ai->ai_protocol = IPPROTO_TCP;
1316 break;
1317 case SOCK_DGRAM:
1318 ai->ai_protocol = IPPROTO_UDP;
1319 break;
1320 default:
1321 ai->ai_protocol = 0;
1322 break;
1324 ai->ai_addrlen = sizeof(struct sockaddr_in);
1325 if (hints && (hints->ai_flags & AI_CANONNAME))
1326 ai->ai_canonname = h ? xstrdup(h->h_name) : NULL;
1327 else
1328 ai->ai_canonname = NULL;
1330 sin = xmalloc(ai->ai_addrlen);
1331 memset(sin, 0, ai->ai_addrlen);
1332 sin->sin_family = AF_INET;
1333 /* Note: getaddrinfo is supposed to allow service to be a string,
1334 * which should be looked up using getservbyname. This is
1335 * currently not implemented */
1336 if (service)
1337 sin->sin_port = htons(atoi(service));
1338 if (h)
1339 sin->sin_addr = *(struct in_addr *)h->h_addr;
1340 else if (hints && (hints->ai_flags & AI_PASSIVE))
1341 sin->sin_addr.s_addr = INADDR_ANY;
1342 else
1343 sin->sin_addr.s_addr = INADDR_LOOPBACK;
1344 ai->ai_addr = (struct sockaddr *)sin;
1345 ai->ai_next = 0;
1346 return 0;
1349 static void WSAAPI freeaddrinfo_stub(struct addrinfo *res)
1351 free(res->ai_canonname);
1352 free(res->ai_addr);
1353 free(res);
1356 static int WSAAPI getnameinfo_stub(const struct sockaddr *sa, socklen_t salen,
1357 char *host, DWORD hostlen,
1358 char *serv, DWORD servlen, int flags)
1360 const struct sockaddr_in *sin = (const struct sockaddr_in *)sa;
1361 if (sa->sa_family != AF_INET)
1362 return EAI_FAMILY;
1363 if (!host && !serv)
1364 return EAI_NONAME;
1366 if (host && hostlen > 0) {
1367 struct hostent *ent = NULL;
1368 if (!(flags & NI_NUMERICHOST))
1369 ent = gethostbyaddr((const char *)&sin->sin_addr,
1370 sizeof(sin->sin_addr), AF_INET);
1372 if (ent)
1373 snprintf(host, hostlen, "%s", ent->h_name);
1374 else if (flags & NI_NAMEREQD)
1375 return EAI_NONAME;
1376 else
1377 snprintf(host, hostlen, "%s", inet_ntoa(sin->sin_addr));
1380 if (serv && servlen > 0) {
1381 struct servent *ent = NULL;
1382 if (!(flags & NI_NUMERICSERV))
1383 ent = getservbyport(sin->sin_port,
1384 flags & NI_DGRAM ? "udp" : "tcp");
1386 if (ent)
1387 snprintf(serv, servlen, "%s", ent->s_name);
1388 else
1389 snprintf(serv, servlen, "%d", ntohs(sin->sin_port));
1392 return 0;
1395 static HMODULE ipv6_dll = NULL;
1396 static void (WSAAPI *ipv6_freeaddrinfo)(struct addrinfo *res);
1397 static int (WSAAPI *ipv6_getaddrinfo)(const char *node, const char *service,
1398 const struct addrinfo *hints,
1399 struct addrinfo **res);
1400 static int (WSAAPI *ipv6_getnameinfo)(const struct sockaddr *sa, socklen_t salen,
1401 char *host, DWORD hostlen,
1402 char *serv, DWORD servlen, int flags);
1404 * gai_strerror is an inline function in the ws2tcpip.h header, so we
1405 * don't need to try to load that one dynamically.
1408 static void socket_cleanup(void)
1410 WSACleanup();
1411 if (ipv6_dll)
1412 FreeLibrary(ipv6_dll);
1413 ipv6_dll = NULL;
1414 ipv6_freeaddrinfo = freeaddrinfo_stub;
1415 ipv6_getaddrinfo = getaddrinfo_stub;
1416 ipv6_getnameinfo = getnameinfo_stub;
1419 static void ensure_socket_initialization(void)
1421 WSADATA wsa;
1422 static int initialized = 0;
1423 const char *libraries[] = { "ws2_32.dll", "wship6.dll", NULL };
1424 const char **name;
1426 if (initialized)
1427 return;
1429 if (WSAStartup(MAKEWORD(2,2), &wsa))
1430 die("unable to initialize winsock subsystem, error %d",
1431 WSAGetLastError());
1433 for (name = libraries; *name; name++) {
1434 ipv6_dll = LoadLibrary(*name);
1435 if (!ipv6_dll)
1436 continue;
1438 ipv6_freeaddrinfo = (void (WSAAPI *)(struct addrinfo *))
1439 GetProcAddress(ipv6_dll, "freeaddrinfo");
1440 ipv6_getaddrinfo = (int (WSAAPI *)(const char *, const char *,
1441 const struct addrinfo *,
1442 struct addrinfo **))
1443 GetProcAddress(ipv6_dll, "getaddrinfo");
1444 ipv6_getnameinfo = (int (WSAAPI *)(const struct sockaddr *,
1445 socklen_t, char *, DWORD,
1446 char *, DWORD, int))
1447 GetProcAddress(ipv6_dll, "getnameinfo");
1448 if (!ipv6_freeaddrinfo || !ipv6_getaddrinfo || !ipv6_getnameinfo) {
1449 FreeLibrary(ipv6_dll);
1450 ipv6_dll = NULL;
1451 } else
1452 break;
1454 if (!ipv6_freeaddrinfo || !ipv6_getaddrinfo || !ipv6_getnameinfo) {
1455 ipv6_freeaddrinfo = freeaddrinfo_stub;
1456 ipv6_getaddrinfo = getaddrinfo_stub;
1457 ipv6_getnameinfo = getnameinfo_stub;
1460 atexit(socket_cleanup);
1461 initialized = 1;
1464 #undef gethostname
1465 int mingw_gethostname(char *name, int namelen)
1467 ensure_socket_initialization();
1468 return gethostname(name, namelen);
1471 #undef gethostbyname
1472 struct hostent *mingw_gethostbyname(const char *host)
1474 ensure_socket_initialization();
1475 return gethostbyname(host);
1478 void mingw_freeaddrinfo(struct addrinfo *res)
1480 ipv6_freeaddrinfo(res);
1483 int mingw_getaddrinfo(const char *node, const char *service,
1484 const struct addrinfo *hints, struct addrinfo **res)
1486 ensure_socket_initialization();
1487 return ipv6_getaddrinfo(node, service, hints, res);
1490 int mingw_getnameinfo(const struct sockaddr *sa, socklen_t salen,
1491 char *host, DWORD hostlen, char *serv, DWORD servlen,
1492 int flags)
1494 ensure_socket_initialization();
1495 return ipv6_getnameinfo(sa, salen, host, hostlen, serv, servlen, flags);
1498 int mingw_socket(int domain, int type, int protocol)
1500 int sockfd;
1501 SOCKET s;
1503 ensure_socket_initialization();
1504 s = WSASocket(domain, type, protocol, NULL, 0, 0);
1505 if (s == INVALID_SOCKET) {
1507 * WSAGetLastError() values are regular BSD error codes
1508 * biased by WSABASEERR.
1509 * However, strerror() does not know about networking
1510 * specific errors, which are values beginning at 38 or so.
1511 * Therefore, we choose to leave the biased error code
1512 * in errno so that _if_ someone looks up the code somewhere,
1513 * then it is at least the number that are usually listed.
1515 errno = WSAGetLastError();
1516 return -1;
1518 /* convert into a file descriptor */
1519 if ((sockfd = _open_osfhandle(s, O_RDWR|O_BINARY)) < 0) {
1520 closesocket(s);
1521 return error("unable to make a socket file descriptor: %s",
1522 strerror(errno));
1524 return sockfd;
1527 #undef connect
1528 int mingw_connect(int sockfd, struct sockaddr *sa, size_t sz)
1530 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
1531 return connect(s, sa, sz);
1534 #undef bind
1535 int mingw_bind(int sockfd, struct sockaddr *sa, size_t sz)
1537 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
1538 return bind(s, sa, sz);
1541 #undef setsockopt
1542 int mingw_setsockopt(int sockfd, int lvl, int optname, void *optval, int optlen)
1544 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
1545 return setsockopt(s, lvl, optname, (const char*)optval, optlen);
1548 #undef shutdown
1549 int mingw_shutdown(int sockfd, int how)
1551 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
1552 return shutdown(s, how);
1555 #undef listen
1556 int mingw_listen(int sockfd, int backlog)
1558 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
1559 return listen(s, backlog);
1562 #undef accept
1563 int mingw_accept(int sockfd1, struct sockaddr *sa, socklen_t *sz)
1565 int sockfd2;
1567 SOCKET s1 = (SOCKET)_get_osfhandle(sockfd1);
1568 SOCKET s2 = accept(s1, sa, sz);
1570 /* convert into a file descriptor */
1571 if ((sockfd2 = _open_osfhandle(s2, O_RDWR|O_BINARY)) < 0) {
1572 int err = errno;
1573 closesocket(s2);
1574 return error("unable to make a socket file descriptor: %s",
1575 strerror(err));
1577 return sockfd2;
1580 #undef rename
1581 int mingw_rename(const char *pold, const char *pnew)
1583 DWORD attrs, gle;
1584 int tries = 0;
1585 wchar_t wpold[MAX_PATH], wpnew[MAX_PATH];
1586 if (xutftowcs_path(wpold, pold) < 0 || xutftowcs_path(wpnew, pnew) < 0)
1587 return -1;
1590 * Try native rename() first to get errno right.
1591 * It is based on MoveFile(), which cannot overwrite existing files.
1593 if (!_wrename(wpold, wpnew))
1594 return 0;
1595 if (errno != EEXIST)
1596 return -1;
1597 repeat:
1598 if (MoveFileExW(wpold, wpnew, MOVEFILE_REPLACE_EXISTING))
1599 return 0;
1600 /* TODO: translate more errors */
1601 gle = GetLastError();
1602 if (gle == ERROR_ACCESS_DENIED &&
1603 (attrs = GetFileAttributesW(wpnew)) != INVALID_FILE_ATTRIBUTES) {
1604 if (attrs & FILE_ATTRIBUTE_DIRECTORY) {
1605 errno = EISDIR;
1606 return -1;
1608 if ((attrs & FILE_ATTRIBUTE_READONLY) &&
1609 SetFileAttributesW(wpnew, attrs & ~FILE_ATTRIBUTE_READONLY)) {
1610 if (MoveFileExW(wpold, wpnew, MOVEFILE_REPLACE_EXISTING))
1611 return 0;
1612 gle = GetLastError();
1613 /* revert file attributes on failure */
1614 SetFileAttributesW(wpnew, attrs);
1617 if (tries < ARRAY_SIZE(delay) && gle == ERROR_ACCESS_DENIED) {
1619 * We assume that some other process had the source or
1620 * destination file open at the wrong moment and retry.
1621 * In order to give the other process a higher chance to
1622 * complete its operation, we give up our time slice now.
1623 * If we have to retry again, we do sleep a bit.
1625 Sleep(delay[tries]);
1626 tries++;
1627 goto repeat;
1629 if (gle == ERROR_ACCESS_DENIED &&
1630 ask_yes_no_if_possible("Rename from '%s' to '%s' failed. "
1631 "Should I try again?", pold, pnew))
1632 goto repeat;
1634 errno = EACCES;
1635 return -1;
1639 * Note that this doesn't return the actual pagesize, but
1640 * the allocation granularity. If future Windows specific git code
1641 * needs the real getpagesize function, we need to find another solution.
1643 int mingw_getpagesize(void)
1645 SYSTEM_INFO si;
1646 GetSystemInfo(&si);
1647 return si.dwAllocationGranularity;
1650 struct passwd *getpwuid(int uid)
1652 static char user_name[100];
1653 static struct passwd p;
1655 DWORD len = sizeof(user_name);
1656 if (!GetUserName(user_name, &len))
1657 return NULL;
1658 p.pw_name = user_name;
1659 p.pw_gecos = "unknown";
1660 p.pw_dir = NULL;
1661 return &p;
1664 static HANDLE timer_event;
1665 static HANDLE timer_thread;
1666 static int timer_interval;
1667 static int one_shot;
1668 static sig_handler_t timer_fn = SIG_DFL;
1670 /* The timer works like this:
1671 * The thread, ticktack(), is a trivial routine that most of the time
1672 * only waits to receive the signal to terminate. The main thread tells
1673 * the thread to terminate by setting the timer_event to the signalled
1674 * state.
1675 * But ticktack() interrupts the wait state after the timer's interval
1676 * length to call the signal handler.
1679 static unsigned __stdcall ticktack(void *dummy)
1681 while (WaitForSingleObject(timer_event, timer_interval) == WAIT_TIMEOUT) {
1682 if (timer_fn == SIG_DFL)
1683 die("Alarm");
1684 if (timer_fn != SIG_IGN)
1685 timer_fn(SIGALRM);
1686 if (one_shot)
1687 break;
1689 return 0;
1692 static int start_timer_thread(void)
1694 timer_event = CreateEvent(NULL, FALSE, FALSE, NULL);
1695 if (timer_event) {
1696 timer_thread = (HANDLE) _beginthreadex(NULL, 0, ticktack, NULL, 0, NULL);
1697 if (!timer_thread )
1698 return errno = ENOMEM,
1699 error("cannot start timer thread");
1700 } else
1701 return errno = ENOMEM,
1702 error("cannot allocate resources for timer");
1703 return 0;
1706 static void stop_timer_thread(void)
1708 if (timer_event)
1709 SetEvent(timer_event); /* tell thread to terminate */
1710 if (timer_thread) {
1711 int rc = WaitForSingleObject(timer_thread, 1000);
1712 if (rc == WAIT_TIMEOUT)
1713 error("timer thread did not terminate timely");
1714 else if (rc != WAIT_OBJECT_0)
1715 error("waiting for timer thread failed: %lu",
1716 GetLastError());
1717 CloseHandle(timer_thread);
1719 if (timer_event)
1720 CloseHandle(timer_event);
1721 timer_event = NULL;
1722 timer_thread = NULL;
1725 static inline int is_timeval_eq(const struct timeval *i1, const struct timeval *i2)
1727 return i1->tv_sec == i2->tv_sec && i1->tv_usec == i2->tv_usec;
1730 int setitimer(int type, struct itimerval *in, struct itimerval *out)
1732 static const struct timeval zero;
1733 static int atexit_done;
1735 if (out != NULL)
1736 return errno = EINVAL,
1737 error("setitimer param 3 != NULL not implemented");
1738 if (!is_timeval_eq(&in->it_interval, &zero) &&
1739 !is_timeval_eq(&in->it_interval, &in->it_value))
1740 return errno = EINVAL,
1741 error("setitimer: it_interval must be zero or eq it_value");
1743 if (timer_thread)
1744 stop_timer_thread();
1746 if (is_timeval_eq(&in->it_value, &zero) &&
1747 is_timeval_eq(&in->it_interval, &zero))
1748 return 0;
1750 timer_interval = in->it_value.tv_sec * 1000 + in->it_value.tv_usec / 1000;
1751 one_shot = is_timeval_eq(&in->it_interval, &zero);
1752 if (!atexit_done) {
1753 atexit(stop_timer_thread);
1754 atexit_done = 1;
1756 return start_timer_thread();
1759 int sigaction(int sig, struct sigaction *in, struct sigaction *out)
1761 if (sig != SIGALRM)
1762 return errno = EINVAL,
1763 error("sigaction only implemented for SIGALRM");
1764 if (out != NULL)
1765 return errno = EINVAL,
1766 error("sigaction: param 3 != NULL not implemented");
1768 timer_fn = in->sa_handler;
1769 return 0;
1772 #undef signal
1773 sig_handler_t mingw_signal(int sig, sig_handler_t handler)
1775 sig_handler_t old = timer_fn;
1776 if (sig != SIGALRM)
1777 return signal(sig, handler);
1778 timer_fn = handler;
1779 return old;
1782 static const char *make_backslash_path(const char *path)
1784 static char buf[PATH_MAX + 1];
1785 char *c;
1787 if (strlcpy(buf, path, PATH_MAX) >= PATH_MAX)
1788 die("Too long path: %.*s", 60, path);
1790 for (c = buf; *c; c++) {
1791 if (*c == '/')
1792 *c = '\\';
1794 return buf;
1797 void mingw_open_html(const char *unixpath)
1799 const char *htmlpath = make_backslash_path(unixpath);
1800 typedef HINSTANCE (WINAPI *T)(HWND, const char *,
1801 const char *, const char *, const char *, INT);
1802 T ShellExecute;
1803 HMODULE shell32;
1804 int r;
1806 shell32 = LoadLibrary("shell32.dll");
1807 if (!shell32)
1808 die("cannot load shell32.dll");
1809 ShellExecute = (T)GetProcAddress(shell32, "ShellExecuteA");
1810 if (!ShellExecute)
1811 die("cannot run browser");
1813 printf("Launching default browser to display HTML ...\n");
1814 r = (int)ShellExecute(NULL, "open", htmlpath, NULL, "\\", SW_SHOWNORMAL);
1815 FreeLibrary(shell32);
1816 /* see the MSDN documentation referring to the result codes here */
1817 if (r <= 32) {
1818 die("failed to launch browser for %.*s", MAX_PATH, unixpath);
1822 int link(const char *oldpath, const char *newpath)
1824 typedef BOOL (WINAPI *T)(LPCWSTR, LPCWSTR, LPSECURITY_ATTRIBUTES);
1825 static T create_hard_link = NULL;
1826 wchar_t woldpath[MAX_PATH], wnewpath[MAX_PATH];
1827 if (xutftowcs_path(woldpath, oldpath) < 0 ||
1828 xutftowcs_path(wnewpath, newpath) < 0)
1829 return -1;
1831 if (!create_hard_link) {
1832 create_hard_link = (T) GetProcAddress(
1833 GetModuleHandle("kernel32.dll"), "CreateHardLinkW");
1834 if (!create_hard_link)
1835 create_hard_link = (T)-1;
1837 if (create_hard_link == (T)-1) {
1838 errno = ENOSYS;
1839 return -1;
1841 if (!create_hard_link(wnewpath, woldpath, NULL)) {
1842 errno = err_win_to_posix(GetLastError());
1843 return -1;
1845 return 0;
1848 char *getpass(const char *prompt)
1850 struct strbuf buf = STRBUF_INIT;
1852 fputs(prompt, stderr);
1853 for (;;) {
1854 char c = _getch();
1855 if (c == '\r' || c == '\n')
1856 break;
1857 strbuf_addch(&buf, c);
1859 fputs("\n", stderr);
1860 return strbuf_detach(&buf, NULL);
1863 pid_t waitpid(pid_t pid, int *status, int options)
1865 HANDLE h = OpenProcess(SYNCHRONIZE | PROCESS_QUERY_INFORMATION,
1866 FALSE, pid);
1867 if (!h) {
1868 errno = ECHILD;
1869 return -1;
1872 if (pid > 0 && options & WNOHANG) {
1873 if (WAIT_OBJECT_0 != WaitForSingleObject(h, 0)) {
1874 CloseHandle(h);
1875 return 0;
1877 options &= ~WNOHANG;
1880 if (options == 0) {
1881 struct pinfo_t **ppinfo;
1882 if (WaitForSingleObject(h, INFINITE) != WAIT_OBJECT_0) {
1883 CloseHandle(h);
1884 return 0;
1887 if (status)
1888 GetExitCodeProcess(h, (LPDWORD)status);
1890 EnterCriticalSection(&pinfo_cs);
1892 ppinfo = &pinfo;
1893 while (*ppinfo) {
1894 struct pinfo_t *info = *ppinfo;
1895 if (info->pid == pid) {
1896 CloseHandle(info->proc);
1897 *ppinfo = info->next;
1898 free(info);
1899 break;
1901 ppinfo = &info->next;
1904 LeaveCriticalSection(&pinfo_cs);
1906 CloseHandle(h);
1907 return pid;
1909 CloseHandle(h);
1911 errno = EINVAL;
1912 return -1;
1915 const char *get_windows_home_directory(void)
1917 static const char *home_directory = NULL;
1918 struct strbuf buf = STRBUF_INIT;
1920 if (home_directory)
1921 return home_directory;
1923 home_directory = getenv("HOME");
1924 if (home_directory && *home_directory)
1925 return home_directory;
1927 strbuf_addf(&buf, "%s/%s", getenv("HOMEDRIVE"), getenv("HOMEPATH"));
1928 home_directory = strbuf_detach(&buf, NULL);
1930 return home_directory;
1933 int mingw_offset_1st_component(const char *path)
1935 int offset = 0;
1936 if (has_dos_drive_prefix(path))
1937 offset = 2;
1939 /* unc paths */
1940 else if (is_dir_sep(path[0]) && is_dir_sep(path[1])) {
1942 /* skip server name */
1943 char *pos = strpbrk(path + 2, "\\/");
1944 if (!pos)
1945 return 0; /* Error: malformed unc path */
1947 do {
1948 pos++;
1949 } while (*pos && !is_dir_sep(*pos));
1951 offset = pos - path;
1954 return offset + is_dir_sep(path[offset]);
1957 int xutftowcsn(wchar_t *wcs, const char *utfs, size_t wcslen, int utflen)
1959 int upos = 0, wpos = 0;
1960 const unsigned char *utf = (const unsigned char*) utfs;
1961 if (!utf || !wcs || wcslen < 1) {
1962 errno = EINVAL;
1963 return -1;
1965 /* reserve space for \0 */
1966 wcslen--;
1967 if (utflen < 0)
1968 utflen = INT_MAX;
1970 while (upos < utflen) {
1971 int c = utf[upos++] & 0xff;
1972 if (utflen == INT_MAX && c == 0)
1973 break;
1975 if (wpos >= wcslen) {
1976 wcs[wpos] = 0;
1977 errno = ERANGE;
1978 return -1;
1981 if (c < 0x80) {
1982 /* ASCII */
1983 wcs[wpos++] = c;
1984 } else if (c >= 0xc2 && c < 0xe0 && upos < utflen &&
1985 (utf[upos] & 0xc0) == 0x80) {
1986 /* 2-byte utf-8 */
1987 c = ((c & 0x1f) << 6);
1988 c |= (utf[upos++] & 0x3f);
1989 wcs[wpos++] = c;
1990 } else if (c >= 0xe0 && c < 0xf0 && upos + 1 < utflen &&
1991 !(c == 0xe0 && utf[upos] < 0xa0) && /* over-long encoding */
1992 (utf[upos] & 0xc0) == 0x80 &&
1993 (utf[upos + 1] & 0xc0) == 0x80) {
1994 /* 3-byte utf-8 */
1995 c = ((c & 0x0f) << 12);
1996 c |= ((utf[upos++] & 0x3f) << 6);
1997 c |= (utf[upos++] & 0x3f);
1998 wcs[wpos++] = c;
1999 } else if (c >= 0xf0 && c < 0xf5 && upos + 2 < utflen &&
2000 wpos + 1 < wcslen &&
2001 !(c == 0xf0 && utf[upos] < 0x90) && /* over-long encoding */
2002 !(c == 0xf4 && utf[upos] >= 0x90) && /* > \u10ffff */
2003 (utf[upos] & 0xc0) == 0x80 &&
2004 (utf[upos + 1] & 0xc0) == 0x80 &&
2005 (utf[upos + 2] & 0xc0) == 0x80) {
2006 /* 4-byte utf-8: convert to \ud8xx \udcxx surrogate pair */
2007 c = ((c & 0x07) << 18);
2008 c |= ((utf[upos++] & 0x3f) << 12);
2009 c |= ((utf[upos++] & 0x3f) << 6);
2010 c |= (utf[upos++] & 0x3f);
2011 c -= 0x10000;
2012 wcs[wpos++] = 0xd800 | (c >> 10);
2013 wcs[wpos++] = 0xdc00 | (c & 0x3ff);
2014 } else if (c >= 0xa0) {
2015 /* invalid utf-8 byte, printable unicode char: convert 1:1 */
2016 wcs[wpos++] = c;
2017 } else {
2018 /* invalid utf-8 byte, non-printable unicode: convert to hex */
2019 static const char *hex = "0123456789abcdef";
2020 wcs[wpos++] = hex[c >> 4];
2021 if (wpos < wcslen)
2022 wcs[wpos++] = hex[c & 0x0f];
2025 wcs[wpos] = 0;
2026 return wpos;
2029 int xwcstoutf(char *utf, const wchar_t *wcs, size_t utflen)
2031 if (!wcs || !utf || utflen < 1) {
2032 errno = EINVAL;
2033 return -1;
2035 utflen = WideCharToMultiByte(CP_UTF8, 0, wcs, -1, utf, utflen, NULL, NULL);
2036 if (utflen)
2037 return utflen - 1;
2038 errno = ERANGE;
2039 return -1;
2043 * Disable MSVCRT command line wildcard expansion (__getmainargs called from
2044 * mingw startup code, see init.c in mingw runtime).
2046 int _CRT_glob = 0;
2048 typedef struct {
2049 int newmode;
2050 } _startupinfo;
2052 extern int __wgetmainargs(int *argc, wchar_t ***argv, wchar_t ***env, int glob,
2053 _startupinfo *si);
2055 void mingw_startup()
2057 int i, len, maxlen, argc;
2058 char *buffer;
2059 wchar_t **wenv, **wargv;
2060 _startupinfo si;
2062 /* get wide char arguments and environment */
2063 si.newmode = 0;
2064 __wgetmainargs(&argc, &wargv, &wenv, _CRT_glob, &si);
2066 /* determine size of argv and environ conversion buffer */
2067 maxlen = wcslen(_wpgmptr);
2068 for (i = 1; i < argc; i++)
2069 maxlen = max(maxlen, wcslen(wargv[i]));
2070 for (i = 0; wenv[i]; i++)
2071 maxlen = max(maxlen, wcslen(wenv[i]));
2073 /* nedmalloc can't free CRT memory, allocate resizable environment list */
2074 environ = xcalloc(i + 1, sizeof(char*));
2076 /* allocate buffer (wchar_t encodes to max 3 UTF-8 bytes) */
2077 maxlen = 3 * maxlen + 1;
2078 buffer = xmalloc(maxlen);
2080 /* convert command line arguments and environment to UTF-8 */
2081 len = xwcstoutf(buffer, _wpgmptr, maxlen);
2082 __argv[0] = xmemdupz(buffer, len);
2083 for (i = 1; i < argc; i++) {
2084 len = xwcstoutf(buffer, wargv[i], maxlen);
2085 __argv[i] = xmemdupz(buffer, len);
2087 for (i = 0; wenv[i]; i++) {
2088 len = xwcstoutf(buffer, wenv[i], maxlen);
2089 environ[i] = xmemdupz(buffer, len);
2091 free(buffer);
2093 /* initialize critical section for waitpid pinfo_t list */
2094 InitializeCriticalSection(&pinfo_cs);
2096 /* set up default file mode and file modes for stdin/out/err */
2097 _fmode = _O_BINARY;
2098 _setmode(_fileno(stdin), _O_BINARY);
2099 _setmode(_fileno(stdout), _O_BINARY);
2100 _setmode(_fileno(stderr), _O_BINARY);
2102 /* initialize Unicode console */
2103 winansi_init();