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config.c: trivial fix for compile-time warning
[git/dscho.git] / compat / mingw.c
blobe707f68b44db13a86683df0f69ccaae5ca116642
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"
7
8 static const int delay[] = { 0, 1, 10, 20, 40 };
9 unsigned int _CRT_fmode = _O_BINARY;
10
11 int err_win_to_posix(DWORD winerr)
12 {
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;
120 }
121 return error;
122 }
123
124 static inline int is_file_in_use_error(DWORD errcode)
125 {
126 switch (errcode) {
127 case ERROR_SHARING_VIOLATION:
128 case ERROR_ACCESS_DENIED:
129 return 1;
130 }
131
132 return 0;
133 }
134
135 static int read_yes_no_answer(void)
136 {
137 char answer[1024];
138
139 if (fgets(answer, sizeof(answer), stdin)) {
140 size_t answer_len = strlen(answer);
141 int got_full_line = 0, c;
142
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;
150 }
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')
154 ;
155 } else
156 /* we could not read, return the
157 * default answer which is no */
158 return 0;
159
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;
168
169 /* did not find an answer we understand */
170 return -1;
171 }
172
173 static int ask_yes_no_if_possible(const char *format, ...)
174 {
175 char question[4096];
176 const char *retry_hook[] = { NULL, NULL, NULL };
177 va_list args;
178
179 va_start(args, format);
180 vsnprintf(question, sizeof(question), format, args);
181 va_end(args);
182
183 if ((retry_hook[0] = mingw_getenv("GIT_ASK_YESNO"))) {
184 retry_hook[1] = question;
185 return !run_command_v_opt(retry_hook, 0);
186 }
187
188 if (!isatty(_fileno(stdin)) || !isatty(_fileno(stderr)))
189 return 0;
190
191 while (1) {
192 int answer;
193 fprintf(stderr, "%s (y/n) ", question);
194
195 if ((answer = read_yes_no_answer()) >= 0)
196 return answer;
197
198 fprintf(stderr, "Sorry, I did not understand your answer. "
199 "Please type 'y' or 'n'\n");
200 }
201 }
202
203 #undef unlink
204 int mingw_unlink(const char *pathname)
205 {
206 int ret, tries = 0;
207
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;
213 /*
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.
219 */
220 Sleep(delay[tries]);
221 tries++;
222 }
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;
228 }
229
230 static int is_dir_empty(const char *path)
231 {
232 struct strbuf buf = STRBUF_INIT;
233 WIN32_FIND_DATAA findbuf;
234 HANDLE handle;
235
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;
241 }
242
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;
248 }
249 FindClose(handle);
250 strbuf_release(&buf);
251 return 0;
252 }
253
254 #undef rmdir
255 int mingw_rmdir(const char *pathname)
256 {
257 int ret, tries = 0;
258
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;
265 }
266 /*
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.
272 */
273 Sleep(delay[tries]);
274 tries++;
275 }
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;
281 }
282
283 static int make_hidden(const char *path)
284 {
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;
290 }
291
292 void mingw_mark_as_git_dir(const char *dir)
293 {
294 if (hide_dotfiles != HIDE_DOTFILES_FALSE && make_hidden(dir))
295 warning("Failed to make '%s' hidden", dir);
296 git_config_set("core.hideDotFiles",
297 hide_dotfiles == HIDE_DOTFILES_FALSE ? "false" :
298 (hide_dotfiles == HIDE_DOTFILES_DOTGITONLY ?
299 "dotGitOnly" : "true"));
300 }
301
302 #undef mkdir
303 int mingw_mkdir(const char *path, int mode)
304 {
305 int ret = mkdir(path);
306 if (!ret && hide_dotfiles == HIDE_DOTFILES_TRUE) {
307 /*
308 * In Windows a file or dir starting with a dot is not
309 * automatically hidden. So lets mark it as hidden when
310 * such a directory is created.
311 */
312 const char *start = basename((char*)path);
313 if (*start == '.')
314 return make_hidden(path);
315 }
316 return ret;
317 }
318
319 #undef open
320 int mingw_open (const char *filename, int oflags, ...)
321 {
322 va_list args;
323 unsigned mode;
324 int fd;
325
326 va_start(args, oflags);
327 mode = va_arg(args, int);
328 va_end(args);
329
330 if (filename && !strcmp(filename, "/dev/null"))
331 filename = "nul";
332
333 fd = open(filename, oflags, mode);
334
335 if (fd < 0 && (oflags & O_CREAT) && errno == EACCES) {
336 DWORD attrs = GetFileAttributes(filename);
337 if (attrs != INVALID_FILE_ATTRIBUTES && (attrs & FILE_ATTRIBUTE_DIRECTORY))
338 errno = EISDIR;
339 }
340 if ((oflags & O_CREAT) && fd >= 0 &&
341 hide_dotfiles == HIDE_DOTFILES_TRUE) {
342 /*
343 * In Windows a file or dir starting with a dot is not
344 * automatically hidden. So lets mark it as hidden when
345 * such a file is created.
346 */
347 const char *start = basename((char*)filename);
348 if (*start == '.' && make_hidden(filename))
349 warning("Could not mark '%s' as hidden.", filename);
350 }
351 return fd;
352 }
353
354 #undef write
355 ssize_t mingw_write(int fd, const void *buf, size_t count)
356 {
357 /*
358 * While write() calls to a file on a local disk are translated
359 * into WriteFile() calls with a maximum size of 64KB on Windows
360 * XP and 256KB on Vista, no such cap is placed on writes to
361 * files over the network on Windows XP. Unfortunately, there
362 * seems to be a limit of 32MB-28KB on X64 and 64MB-32KB on x86;
363 * bigger writes fail on Windows XP.
364 * So we cap to a nice 31MB here to avoid write failures over
365 * the net without changing the number of WriteFile() calls in
366 * the local case.
367 */
368 return write(fd, buf, min(count, 31 * 1024 * 1024));
369 }
370
371 #undef fopen
372 FILE *mingw_fopen (const char *filename, const char *otype)
373 {
374 int hide = 0;
375 FILE *file;
376 if (hide_dotfiles == HIDE_DOTFILES_TRUE &&
377 basename((char*)filename)[0] == '.')
378 hide = access(filename, F_OK);
379 if (filename && !strcmp(filename, "/dev/null"))
380 filename = "nul";
381 file = fopen(filename, otype);
382 if (file && hide && make_hidden(filename))
383 warning("Could not mark '%s' as hidden.", filename);
384 return file;
385 }
386
387 #undef freopen
388 FILE *mingw_freopen (const char *filename, const char *otype, FILE *stream)
389 {
390 int hide = 0;
391 FILE *file;
392 if (hide_dotfiles == HIDE_DOTFILES_TRUE &&
393 basename((char*)filename)[0] == '.')
394 hide = access(filename, F_OK);
395 if (filename && !strcmp(filename, "/dev/null"))
396 filename = "nul";
397 file = freopen(filename, otype, stream);
398 if (file && hide && make_hidden(filename))
399 warning("Could not mark '%s' as hidden.", filename);
400 return file;
401 }
402
403 /*
404 * The unit of FILETIME is 100-nanoseconds since January 1, 1601, UTC.
405 * Returns the 100-nanoseconds ("hekto nanoseconds") since the epoch.
406 */
407 static inline long long filetime_to_hnsec(const FILETIME *ft)
408 {
409 long long winTime = ((long long)ft->dwHighDateTime << 32) + ft->dwLowDateTime;
410 /* Windows to Unix Epoch conversion */
411 return winTime - 116444736000000000LL;
412 }
413
414 static inline time_t filetime_to_time_t(const FILETIME *ft)
415 {
416 return (time_t)(filetime_to_hnsec(ft) / 10000000);
417 }
418
419 /* We keep the do_lstat code in a separate function to avoid recursion.
420 * When a path ends with a slash, the stat will fail with ENOENT. In
421 * this case, we strip the trailing slashes and stat again.
422 *
423 * If follow is true then act like stat() and report on the link
424 * target. Otherwise report on the link itself.
425 */
426 static int do_lstat(int follow, const char *file_name, struct stat *buf)
427 {
428 int err;
429 WIN32_FILE_ATTRIBUTE_DATA fdata;
430
431 if (!(err = get_file_attr(file_name, &fdata))) {
432 buf->st_ino = 0;
433 buf->st_gid = 0;
434 buf->st_uid = 0;
435 buf->st_nlink = 1;
436 buf->st_mode = file_attr_to_st_mode(fdata.dwFileAttributes);
437 buf->st_size = fdata.nFileSizeLow |
438 (((off_t)fdata.nFileSizeHigh)<<32);
439 buf->st_dev = buf->st_rdev = 0; /* not used by Git */
440 buf->st_atime = filetime_to_time_t(&(fdata.ftLastAccessTime));
441 buf->st_mtime = filetime_to_time_t(&(fdata.ftLastWriteTime));
442 buf->st_ctime = filetime_to_time_t(&(fdata.ftCreationTime));
443 if (fdata.dwFileAttributes & FILE_ATTRIBUTE_REPARSE_POINT) {
444 WIN32_FIND_DATAA findbuf;
445 HANDLE handle = FindFirstFileA(file_name, &findbuf);
446 if (handle != INVALID_HANDLE_VALUE) {
447 if ((findbuf.dwFileAttributes & FILE_ATTRIBUTE_REPARSE_POINT) &&
448 (findbuf.dwReserved0 == IO_REPARSE_TAG_SYMLINK)) {
449 if (follow) {
450 char buffer[MAXIMUM_REPARSE_DATA_BUFFER_SIZE];
451 buf->st_size = readlink(file_name, buffer, MAXIMUM_REPARSE_DATA_BUFFER_SIZE);
452 } else {
453 buf->st_mode = S_IFLNK;
454 }
455 buf->st_mode |= S_IREAD;
456 if (!(findbuf.dwFileAttributes & FILE_ATTRIBUTE_READONLY))
457 buf->st_mode |= S_IWRITE;
458 }
459 FindClose(handle);
460 }
461 }
462 return 0;
463 }
464 errno = err;
465 return -1;
466 }
467
468 /* We provide our own lstat/fstat functions, since the provided
469 * lstat/fstat functions are so slow. These stat functions are
470 * tailored for Git's usage (read: fast), and are not meant to be
471 * complete. Note that Git stat()s are redirected to mingw_lstat()
472 * too, since Windows doesn't really handle symlinks that well.
473 */
474 static int do_stat_internal(int follow, const char *file_name, struct stat *buf)
475 {
476 int namelen;
477 static char alt_name[PATH_MAX];
478
479 if (!do_lstat(follow, file_name, buf))
480 return 0;
481
482 /* if file_name ended in a '/', Windows returned ENOENT;
483 * try again without trailing slashes
484 */
485 if (errno != ENOENT)
486 return -1;
487
488 namelen = strlen(file_name);
489 if (namelen && file_name[namelen-1] != '/')
490 return -1;
491 while (namelen && file_name[namelen-1] == '/')
492 --namelen;
493 if (!namelen || namelen >= PATH_MAX)
494 return -1;
495
496 memcpy(alt_name, file_name, namelen);
497 alt_name[namelen] = 0;
498 return do_lstat(follow, alt_name, buf);
499 }
500
501 int mingw_lstat(const char *file_name, struct stat *buf)
502 {
503 return do_stat_internal(0, file_name, buf);
504 }
505 int mingw_stat(const char *file_name, struct stat *buf)
506 {
507 return do_stat_internal(1, file_name, buf);
508 }
509
510 #undef fstat
511 int mingw_fstat(int fd, struct stat *buf)
512 {
513 HANDLE fh = (HANDLE)_get_osfhandle(fd);
514 BY_HANDLE_FILE_INFORMATION fdata;
515
516 if (fh == INVALID_HANDLE_VALUE) {
517 errno = EBADF;
518 return -1;
519 }
520 /* direct non-file handles to MS's fstat() */
521 if (GetFileType(fh) != FILE_TYPE_DISK)
522 return _fstati64(fd, buf);
523
524 if (GetFileInformationByHandle(fh, &fdata)) {
525 buf->st_ino = 0;
526 buf->st_gid = 0;
527 buf->st_uid = 0;
528 buf->st_nlink = 1;
529 buf->st_mode = file_attr_to_st_mode(fdata.dwFileAttributes);
530 buf->st_size = fdata.nFileSizeLow |
531 (((off_t)fdata.nFileSizeHigh)<<32);
532 buf->st_dev = buf->st_rdev = 0; /* not used by Git */
533 buf->st_atime = filetime_to_time_t(&(fdata.ftLastAccessTime));
534 buf->st_mtime = filetime_to_time_t(&(fdata.ftLastWriteTime));
535 buf->st_ctime = filetime_to_time_t(&(fdata.ftCreationTime));
536 return 0;
537 }
538 errno = EBADF;
539 return -1;
540 }
541
542 static inline void time_t_to_filetime(time_t t, FILETIME *ft)
543 {
544 long long winTime = t * 10000000LL + 116444736000000000LL;
545 ft->dwLowDateTime = winTime;
546 ft->dwHighDateTime = winTime >> 32;
547 }
548
549 int mingw_utime (const char *file_name, const struct utimbuf *times)
550 {
551 FILETIME mft, aft;
552 int fh, rc;
553
554 /* must have write permission */
555 DWORD attrs = GetFileAttributes(file_name);
556 if (attrs != INVALID_FILE_ATTRIBUTES &&
557 (attrs & FILE_ATTRIBUTE_READONLY)) {
558 /* ignore errors here; open() will report them */
559 SetFileAttributes(file_name, attrs & ~FILE_ATTRIBUTE_READONLY);
560 }
561
562 if ((fh = open(file_name, O_RDWR | O_BINARY)) < 0) {
563 rc = -1;
564 goto revert_attrs;
565 }
566
567 if (times) {
568 time_t_to_filetime(times->modtime, &mft);
569 time_t_to_filetime(times->actime, &aft);
570 } else {
571 GetSystemTimeAsFileTime(&mft);
572 aft = mft;
573 }
574 if (!SetFileTime((HANDLE)_get_osfhandle(fh), NULL, &aft, &mft)) {
575 errno = EINVAL;
576 rc = -1;
577 } else
578 rc = 0;
579 close(fh);
580
581 revert_attrs:
582 if (attrs != INVALID_FILE_ATTRIBUTES &&
583 (attrs & FILE_ATTRIBUTE_READONLY)) {
584 /* ignore errors again */
585 SetFileAttributes(file_name, attrs);
586 }
587 return rc;
588 }
589
590 unsigned int sleep (unsigned int seconds)
591 {
592 Sleep(seconds*1000);
593 return 0;
594 }
595
596 int mkstemp(char *template)
597 {
598 char *filename = mktemp(template);
599 if (filename == NULL)
600 return -1;
601 return open(filename, O_RDWR | O_CREAT, 0600);
602 }
603
604 int gettimeofday(struct timeval *tv, void *tz)
605 {
606 FILETIME ft;
607 long long hnsec;
608
609 GetSystemTimeAsFileTime(&ft);
610 hnsec = filetime_to_hnsec(&ft);
611 tv->tv_sec = hnsec / 10000000;
612 tv->tv_usec = (hnsec % 10000000) / 10;
613 return 0;
614 }
615
616 int pipe(int filedes[2])
617 {
618 HANDLE h[2];
619
620 /* this creates non-inheritable handles */
621 if (!CreatePipe(&h[0], &h[1], NULL, 8192)) {
622 errno = err_win_to_posix(GetLastError());
623 return -1;
624 }
625 filedes[0] = _open_osfhandle((int)h[0], O_NOINHERIT);
626 if (filedes[0] < 0) {
627 CloseHandle(h[0]);
628 CloseHandle(h[1]);
629 return -1;
630 }
631 filedes[1] = _open_osfhandle((int)h[1], O_NOINHERIT);
632 if (filedes[0] < 0) {
633 close(filedes[0]);
634 CloseHandle(h[1]);
635 return -1;
636 }
637 return 0;
638 }
639
640 struct tm *gmtime_r(const time_t *timep, struct tm *result)
641 {
642 /* gmtime() in MSVCRT.DLL is thread-safe, but not reentrant */
643 memcpy(result, gmtime(timep), sizeof(struct tm));
644 return result;
645 }
646
647 struct tm *localtime_r(const time_t *timep, struct tm *result)
648 {
649 /* localtime() in MSVCRT.DLL is thread-safe, but not reentrant */
650 memcpy(result, localtime(timep), sizeof(struct tm));
651 return result;
652 }
653
654 #undef getcwd
655 char *mingw_getcwd(char *pointer, int len)
656 {
657 int i;
658 char *ret = getcwd(pointer, len);
659 if (!ret)
660 return ret;
661 for (i = 0; pointer[i]; i++)
662 if (pointer[i] == '\\')
663 pointer[i] = '/';
664 return ret;
665 }
666
667 /*
668 * See http://msdn2.microsoft.com/en-us/library/17w5ykft(vs.71).aspx
669 * (Parsing C++ Command-Line Arguments)
670 */
671 static const char *quote_arg(const char *arg)
672 {
673 /* count chars to quote */
674 int len = 0, n = 0;
675 int force_quotes = 0;
676 char *q, *d;
677 const char *p = arg;
678 if (!*p) force_quotes = 1;
679 while (*p) {
680 if (isspace(*p) || *p == '*' || *p == '?' || *p == '{' || *p == '\'')
681 force_quotes = 1;
682 else if (*p == '"')
683 n++;
684 else if (*p == '\\') {
685 int count = 0;
686 while (*p == '\\') {
687 count++;
688 p++;
689 len++;
690 }
691 if (*p == '"')
692 n += count*2 + 1;
693 continue;
694 }
695 len++;
696 p++;
697 }
698 if (!force_quotes && n == 0)
699 return arg;
700
701 /* insert \ where necessary */
702 d = q = xmalloc(len+n+3);
703 *d++ = '"';
704 while (*arg) {
705 if (*arg == '"')
706 *d++ = '\\';
707 else if (*arg == '\\') {
708 int count = 0;
709 while (*arg == '\\') {
710 count++;
711 *d++ = *arg++;
712 }
713 if (*arg == '"') {
714 while (count-- > 0)
715 *d++ = '\\';
716 *d++ = '\\';
717 }
718 }
719 *d++ = *arg++;
720 }
721 *d++ = '"';
722 *d++ = 0;
723 return q;
724 }
725
726 static const char *parse_interpreter(const char *cmd)
727 {
728 static char buf[100];
729 char *p, *opt;
730 int n, fd;
731
732 /* don't even try a .exe */
733 n = strlen(cmd);
734 if (n >= 4 && !strcasecmp(cmd+n-4, ".exe"))
735 return NULL;
736
737 fd = open(cmd, O_RDONLY);
738 if (fd < 0)
739 return NULL;
740 n = read(fd, buf, sizeof(buf)-1);
741 close(fd);
742 if (n < 4) /* at least '#!/x' and not error */
743 return NULL;
744
745 if (buf[0] != '#' || buf[1] != '!')
746 return NULL;
747 buf[n] = '\0';
748 p = buf + strcspn(buf, "\r\n");
749 if (!*p)
750 return NULL;
751
752 *p = '\0';
753 if (!(p = strrchr(buf+2, '/')) && !(p = strrchr(buf+2, '\\')))
754 return NULL;
755 /* strip options */
756 if ((opt = strchr(p+1, ' ')))
757 *opt = '\0';
758 return p+1;
759 }
760
761 /*
762 * Splits the PATH into parts.
763 */
764 static char **get_path_split(void)
765 {
766 char *p, **path, *envpath = mingw_getenv("PATH");
767 int i, n = 0;
768
769 if (!envpath || !*envpath)
770 return NULL;
771
772 envpath = xstrdup(envpath);
773 p = envpath;
774 while (p) {
775 char *dir = p;
776 p = strchr(p, ';');
777 if (p) *p++ = '\0';
778 if (*dir) { /* not earlier, catches series of ; */
779 ++n;
780 }
781 }
782 if (!n)
783 return NULL;
784
785 path = xmalloc((n+1)*sizeof(char *));
786 p = envpath;
787 i = 0;
788 do {
789 if (*p)
790 path[i++] = xstrdup(p);
791 p = p+strlen(p)+1;
792 } while (i < n);
793 path[i] = NULL;
794
795 free(envpath);
796
797 return path;
798 }
799
800 static void free_path_split(char **path)
801 {
802 char **p = path;
803
804 if (!path)
805 return;
806
807 while (*p)
808 free(*p++);
809 free(path);
810 }
811
812 /*
813 * exe_only means that we only want to detect .exe files, but not scripts
814 * (which do not have an extension)
815 */
816 static char *lookup_prog(const char *dir, const char *cmd, int isexe, int exe_only)
817 {
818 char path[MAX_PATH];
819 snprintf(path, sizeof(path), "%s/%s.exe", dir, cmd);
820
821 if (!isexe && access(path, F_OK) == 0)
822 return xstrdup(path);
823 path[strlen(path)-4] = '\0';
824 if ((!exe_only || isexe) && access(path, F_OK) == 0)
825 if (!(GetFileAttributes(path) & FILE_ATTRIBUTE_DIRECTORY))
826 return xstrdup(path);
827 return NULL;
828 }
829
830 /*
831 * Determines the absolute path of cmd using the split path in path.
832 * If cmd contains a slash or backslash, no lookup is performed.
833 */
834 static char *path_lookup(const char *cmd, char **path, int exe_only)
835 {
836 char *prog = NULL;
837 int len = strlen(cmd);
838 int isexe = len >= 4 && !strcasecmp(cmd+len-4, ".exe");
839
840 if (strchr(cmd, '/') || strchr(cmd, '\\'))
841 prog = xstrdup(cmd);
842
843 while (!prog && *path)
844 prog = lookup_prog(*path++, cmd, isexe, exe_only);
845
846 return prog;
847 }
848
849 static int env_compare(const void *a, const void *b)
850 {
851 char *const *ea = a;
852 char *const *eb = b;
853 return strcasecmp(*ea, *eb);
854 }
855
856 struct pinfo_t {
857 struct pinfo_t *next;
858 pid_t pid;
859 HANDLE proc;
860 } pinfo_t;
861 struct pinfo_t *pinfo = NULL;
862 CRITICAL_SECTION pinfo_cs;
863
864 static pid_t mingw_spawnve_fd(const char *cmd, const char **argv, char **env,
865 const char *dir,
866 int prepend_cmd, int fhin, int fhout, int fherr)
867 {
868 STARTUPINFO si;
869 PROCESS_INFORMATION pi;
870 struct strbuf envblk, args;
871 unsigned flags;
872 BOOL ret;
873
874 /* Determine whether or not we are associated to a console */
875 HANDLE cons = CreateFile("CONOUT$", GENERIC_WRITE,
876 FILE_SHARE_WRITE, NULL, OPEN_EXISTING,
877 FILE_ATTRIBUTE_NORMAL, NULL);
878 if (cons == INVALID_HANDLE_VALUE) {
879 /* There is no console associated with this process.
880 * Since the child is a console process, Windows
881 * would normally create a console window. But
882 * since we'll be redirecting std streams, we do
883 * not need the console.
884 * It is necessary to use DETACHED_PROCESS
885 * instead of CREATE_NO_WINDOW to make ssh
886 * recognize that it has no console.
887 */
888 flags = DETACHED_PROCESS;
889 } else {
890 /* There is already a console. If we specified
891 * DETACHED_PROCESS here, too, Windows would
892 * disassociate the child from the console.
893 * The same is true for CREATE_NO_WINDOW.
894 * Go figure!
895 */
896 flags = 0;
897 CloseHandle(cons);
898 }
899 memset(&si, 0, sizeof(si));
900 si.cb = sizeof(si);
901 si.dwFlags = STARTF_USESTDHANDLES;
902 si.hStdInput = (HANDLE) _get_osfhandle(fhin);
903 si.hStdOutput = (HANDLE) _get_osfhandle(fhout);
904 si.hStdError = (HANDLE) _get_osfhandle(fherr);
905
906 /* concatenate argv, quoting args as we go */
907 strbuf_init(&args, 0);
908 if (prepend_cmd) {
909 char *quoted = (char *)quote_arg(cmd);
910 strbuf_addstr(&args, quoted);
911 if (quoted != cmd)
912 free(quoted);
913 }
914 for (; *argv; argv++) {
915 char *quoted = (char *)quote_arg(*argv);
916 if (*args.buf)
917 strbuf_addch(&args, ' ');
918 strbuf_addstr(&args, quoted);
919 if (quoted != *argv)
920 free(quoted);
921 }
922
923 if (env) {
924 int count = 0;
925 char **e, **sorted_env;
926
927 for (e = env; *e; e++)
928 count++;
929
930 /* environment must be sorted */
931 sorted_env = xmalloc(sizeof(*sorted_env) * (count + 1));
932 memcpy(sorted_env, env, sizeof(*sorted_env) * (count + 1));
933 qsort(sorted_env, count, sizeof(*sorted_env), env_compare);
934
935 strbuf_init(&envblk, 0);
936 for (e = sorted_env; *e; e++) {
937 strbuf_addstr(&envblk, *e);
938 strbuf_addch(&envblk, '\0');
939 }
940 free(sorted_env);
941 }
942
943 memset(&pi, 0, sizeof(pi));
944 ret = CreateProcess(cmd, args.buf, NULL, NULL, TRUE, flags,
945 env ? envblk.buf : NULL, dir, &si, &pi);
946
947 if (env)
948 strbuf_release(&envblk);
949 strbuf_release(&args);
950
951 if (!ret) {
952 errno = ENOENT;
953 return -1;
954 }
955 CloseHandle(pi.hThread);
956
957 /*
958 * The process ID is the human-readable identifier of the process
959 * that we want to present in log and error messages. The handle
960 * is not useful for this purpose. But we cannot close it, either,
961 * because it is not possible to turn a process ID into a process
962 * handle after the process terminated.
963 * Keep the handle in a list for waitpid.
964 */
965 EnterCriticalSection(&pinfo_cs);
966 {
967 struct pinfo_t *info = xmalloc(sizeof(struct pinfo_t));
968 info->pid = pi.dwProcessId;
969 info->proc = pi.hProcess;
970 info->next = pinfo;
971 pinfo = info;
972 }
973 LeaveCriticalSection(&pinfo_cs);
974
975 return (pid_t)pi.dwProcessId;
976 }
977
978 static pid_t mingw_spawnve(const char *cmd, const char **argv, char **env,
979 int prepend_cmd)
980 {
981 return mingw_spawnve_fd(cmd, argv, env, NULL, prepend_cmd, 0, 1, 2);
982 }
983
984 pid_t mingw_spawnvpe(const char *cmd, const char **argv, char **env,
985 const char *dir,
986 int fhin, int fhout, int fherr)
987 {
988 pid_t pid;
989 char **path = get_path_split();
990 char *prog = path_lookup(cmd, path, 0);
991
992 if (!prog) {
993 errno = ENOENT;
994 pid = -1;
995 }
996 else {
997 const char *interpr = parse_interpreter(prog);
998
999 if (interpr) {
1000 const char *argv0 = argv[0];
1001 char *iprog = path_lookup(interpr, path, 1);
1002 argv[0] = prog;
1003 if (!iprog) {
1004 errno = ENOENT;
1005 pid = -1;
1006 }
1007 else {
1008 pid = mingw_spawnve_fd(iprog, argv, env, dir, 1,
1009 fhin, fhout, fherr);
1010 free(iprog);
1011 }
1012 argv[0] = argv0;
1013 }
1014 else
1015 pid = mingw_spawnve_fd(prog, argv, env, dir, 0,
1016 fhin, fhout, fherr);
1017 free(prog);
1018 }
1019 free_path_split(path);
1020 return pid;
1021 }
1022
1023 static int try_shell_exec(const char *cmd, char *const *argv, char **env)
1024 {
1025 const char *interpr = parse_interpreter(cmd);
1026 char **path;
1027 char *prog;
1028 int pid = 0;
1029
1030 if (!interpr)
1031 return 0;
1032 path = get_path_split();
1033 prog = path_lookup(interpr, path, 1);
1034 if (prog) {
1035 int argc = 0;
1036 const char **argv2;
1037 while (argv[argc]) argc++;
1038 argv2 = xmalloc(sizeof(*argv) * (argc+1));
1039 argv2[0] = (char *)cmd; /* full path to the script file */
1040 memcpy(&argv2[1], &argv[1], sizeof(*argv) * argc);
1041 pid = mingw_spawnve(prog, argv2, env, 1);
1042 if (pid >= 0) {
1043 int status;
1044 if (waitpid(pid, &status, 0) < 0)
1045 status = 255;
1046 exit(status);
1047 }
1048 pid = 1; /* indicate that we tried but failed */
1049 free(prog);
1050 free(argv2);
1051 }
1052 free_path_split(path);
1053 return pid;
1054 }
1055
1056 static void mingw_execve(const char *cmd, char *const *argv, char *const *env)
1057 {
1058 /* check if git_command is a shell script */
1059 if (!try_shell_exec(cmd, argv, (char **)env)) {
1060 int pid, status;
1061
1062 pid = mingw_spawnve(cmd, (const char **)argv, (char **)env, 0);
1063 if (pid < 0)
1064 return;
1065 if (waitpid(pid, &status, 0) < 0)
1066 status = 255;
1067 exit(status);
1068 }
1069 }
1070
1071 void mingw_execvp(const char *cmd, char *const *argv)
1072 {
1073 char **path = get_path_split();
1074 char *prog = path_lookup(cmd, path, 0);
1075
1076 if (prog) {
1077 mingw_execve(prog, argv, environ);
1078 free(prog);
1079 } else
1080 errno = ENOENT;
1081
1082 free_path_split(path);
1083 }
1084
1085 void mingw_execv(const char *cmd, char *const *argv)
1086 {
1087 mingw_execve(cmd, argv, environ);
1088 }
1089
1090 int mingw_kill(pid_t pid, int sig)
1091 {
1092 if (pid > 0 && sig == SIGTERM) {
1093 HANDLE h = OpenProcess(PROCESS_TERMINATE, FALSE, pid);
1094
1095 if (TerminateProcess(h, -1)) {
1096 CloseHandle(h);
1097 return 0;
1098 }
1099
1100 errno = err_win_to_posix(GetLastError());
1101 CloseHandle(h);
1102 return -1;
1103 }
1104
1105 errno = EINVAL;
1106 return -1;
1107 }
1108
1109 static char **copy_environ(void)
1110 {
1111 char **env;
1112 int i = 0;
1113 while (environ[i])
1114 i++;
1115 env = xmalloc((i+1)*sizeof(*env));
1116 for (i = 0; environ[i]; i++)
1117 env[i] = xstrdup(environ[i]);
1118 env[i] = NULL;
1119 return env;
1120 }
1121
1122 void free_environ(char **env)
1123 {
1124 int i;
1125 for (i = 0; env[i]; i++)
1126 free(env[i]);
1127 free(env);
1128 }
1129
1130 static int lookup_env(char **env, const char *name, size_t nmln)
1131 {
1132 int i;
1133
1134 for (i = 0; env[i]; i++) {
1135 if (0 == strncmp(env[i], name, nmln)
1136 && '=' == env[i][nmln])
1137 /* matches */
1138 return i;
1139 }
1140 return -1;
1141 }
1142
1143 /*
1144 * If name contains '=', then sets the variable, otherwise it unsets it
1145 */
1146 static char **env_setenv(char **env, const char *name)
1147 {
1148 char *eq = strchrnul(name, '=');
1149 int i = lookup_env(env, name, eq-name);
1150
1151 if (i < 0) {
1152 if (*eq) {
1153 for (i = 0; env[i]; i++)
1154 ;
1155 env = xrealloc(env, (i+2)*sizeof(*env));
1156 env[i] = xstrdup(name);
1157 env[i+1] = NULL;
1158 }
1159 }
1160 else {
1161 free(env[i]);
1162 if (*eq)
1163 env[i] = xstrdup(name);
1164 else
1165 for (; env[i]; i++)
1166 env[i] = env[i+1];
1167 }
1168 return env;
1169 }
1170
1171 /*
1172 * Copies global environ and adjusts variables as specified by vars.
1173 */
1174 char **make_augmented_environ(const char *const *vars)
1175 {
1176 char **env = copy_environ();
1177
1178 while (*vars)
1179 env = env_setenv(env, *vars++);
1180 return env;
1181 }
1182
1183 #undef getenv
1184
1185 /*
1186 * The system's getenv looks up the name in a case-insensitive manner.
1187 * This version tries a case-sensitive lookup and falls back to
1188 * case-insensitive if nothing was found. This is necessary because,
1189 * as a prominent example, CMD sets 'Path', but not 'PATH'.
1190 * Warning: not thread-safe.
1191 */
1192 static char *getenv_cs(const char *name)
1193 {
1194 size_t len = strlen(name);
1195 int i = lookup_env(environ, name, len);
1196 if (i >= 0)
1197 return environ[i] + len + 1; /* skip past name and '=' */
1198 return getenv(name);
1199 }
1200
1201 char *mingw_getenv(const char *name)
1202 {
1203 char *result = getenv_cs(name);
1204 if (!result && !strcmp(name, "TMPDIR")) {
1205 /* on Windows it is TMP and TEMP */
1206 result = getenv_cs("TMP");
1207 if (!result)
1208 result = getenv_cs("TEMP");
1209 }
1210 return result;
1211 }
1212
1213 /*
1214 * Note, this isn't a complete replacement for getaddrinfo. It assumes
1215 * that service contains a numerical port, or that it is null. It
1216 * does a simple search using gethostbyname, and returns one IPv4 host
1217 * if one was found.
1218 */
1219 static int WSAAPI getaddrinfo_stub(const char *node, const char *service,
1220 const struct addrinfo *hints,
1221 struct addrinfo **res)
1222 {
1223 struct hostent *h = NULL;
1224 struct addrinfo *ai;
1225 struct sockaddr_in *sin;
1226
1227 if (node) {
1228 h = gethostbyname(node);
1229 if (!h)
1230 return WSAGetLastError();
1231 }
1232
1233 ai = xmalloc(sizeof(struct addrinfo));
1234 *res = ai;
1235 ai->ai_flags = 0;
1236 ai->ai_family = AF_INET;
1237 ai->ai_socktype = hints ? hints->ai_socktype : 0;
1238 switch (ai->ai_socktype) {
1239 case SOCK_STREAM:
1240 ai->ai_protocol = IPPROTO_TCP;
1241 break;
1242 case SOCK_DGRAM:
1243 ai->ai_protocol = IPPROTO_UDP;
1244 break;
1245 default:
1246 ai->ai_protocol = 0;
1247 break;
1248 }
1249 ai->ai_addrlen = sizeof(struct sockaddr_in);
1250 if (hints && (hints->ai_flags & AI_CANONNAME))
1251 ai->ai_canonname = h ? xstrdup(h->h_name) : NULL;
1252 else
1253 ai->ai_canonname = NULL;
1254
1255 sin = xmalloc(ai->ai_addrlen);
1256 memset(sin, 0, ai->ai_addrlen);
1257 sin->sin_family = AF_INET;
1258 /* Note: getaddrinfo is supposed to allow service to be a string,
1259 * which should be looked up using getservbyname. This is
1260 * currently not implemented */
1261 if (service)
1262 sin->sin_port = htons(atoi(service));
1263 if (h)
1264 sin->sin_addr = *(struct in_addr *)h->h_addr;
1265 else if (hints && (hints->ai_flags & AI_PASSIVE))
1266 sin->sin_addr.s_addr = INADDR_ANY;
1267 else
1268 sin->sin_addr.s_addr = INADDR_LOOPBACK;
1269 ai->ai_addr = (struct sockaddr *)sin;
1270 ai->ai_next = 0;
1271 return 0;
1272 }
1273
1274 static void WSAAPI freeaddrinfo_stub(struct addrinfo *res)
1275 {
1276 free(res->ai_canonname);
1277 free(res->ai_addr);
1278 free(res);
1279 }
1280
1281 static int WSAAPI getnameinfo_stub(const struct sockaddr *sa, socklen_t salen,
1282 char *host, DWORD hostlen,
1283 char *serv, DWORD servlen, int flags)
1284 {
1285 const struct sockaddr_in *sin = (const struct sockaddr_in *)sa;
1286 if (sa->sa_family != AF_INET)
1287 return EAI_FAMILY;
1288 if (!host && !serv)
1289 return EAI_NONAME;
1290
1291 if (host && hostlen > 0) {
1292 struct hostent *ent = NULL;
1293 if (!(flags & NI_NUMERICHOST))
1294 ent = gethostbyaddr((const char *)&sin->sin_addr,
1295 sizeof(sin->sin_addr), AF_INET);
1296
1297 if (ent)
1298 snprintf(host, hostlen, "%s", ent->h_name);
1299 else if (flags & NI_NAMEREQD)
1300 return EAI_NONAME;
1301 else
1302 snprintf(host, hostlen, "%s", inet_ntoa(sin->sin_addr));
1303 }
1304
1305 if (serv && servlen > 0) {
1306 struct servent *ent = NULL;
1307 if (!(flags & NI_NUMERICSERV))
1308 ent = getservbyport(sin->sin_port,
1309 flags & NI_DGRAM ? "udp" : "tcp");
1310
1311 if (ent)
1312 snprintf(serv, servlen, "%s", ent->s_name);
1313 else
1314 snprintf(serv, servlen, "%d", ntohs(sin->sin_port));
1315 }
1316
1317 return 0;
1318 }
1319
1320 static HMODULE ipv6_dll = NULL;
1321 static void (WSAAPI *ipv6_freeaddrinfo)(struct addrinfo *res);
1322 static int (WSAAPI *ipv6_getaddrinfo)(const char *node, const char *service,
1323 const struct addrinfo *hints,
1324 struct addrinfo **res);
1325 static int (WSAAPI *ipv6_getnameinfo)(const struct sockaddr *sa, socklen_t salen,
1326 char *host, DWORD hostlen,
1327 char *serv, DWORD servlen, int flags);
1328 /*
1329 * gai_strerror is an inline function in the ws2tcpip.h header, so we
1330 * don't need to try to load that one dynamically.
1331 */
1332
1333 static void socket_cleanup(void)
1334 {
1335 WSACleanup();
1336 if (ipv6_dll)
1337 FreeLibrary(ipv6_dll);
1338 ipv6_dll = NULL;
1339 ipv6_freeaddrinfo = freeaddrinfo_stub;
1340 ipv6_getaddrinfo = getaddrinfo_stub;
1341 ipv6_getnameinfo = getnameinfo_stub;
1342 }
1343
1344 static void ensure_socket_initialization(void)
1345 {
1346 WSADATA wsa;
1347 static int initialized = 0;
1348 const char *libraries[] = { "ws2_32.dll", "wship6.dll", NULL };
1349 const char **name;
1350
1351 if (initialized)
1352 return;
1353
1354 if (WSAStartup(MAKEWORD(2,2), &wsa))
1355 die("unable to initialize winsock subsystem, error %d",
1356 WSAGetLastError());
1357
1358 for (name = libraries; *name; name++) {
1359 ipv6_dll = LoadLibrary(*name);
1360 if (!ipv6_dll)
1361 continue;
1362
1363 ipv6_freeaddrinfo = (void (WSAAPI *)(struct addrinfo *))
1364 GetProcAddress(ipv6_dll, "freeaddrinfo");
1365 ipv6_getaddrinfo = (int (WSAAPI *)(const char *, const char *,
1366 const struct addrinfo *,
1367 struct addrinfo **))
1368 GetProcAddress(ipv6_dll, "getaddrinfo");
1369 ipv6_getnameinfo = (int (WSAAPI *)(const struct sockaddr *,
1370 socklen_t, char *, DWORD,
1371 char *, DWORD, int))
1372 GetProcAddress(ipv6_dll, "getnameinfo");
1373 if (!ipv6_freeaddrinfo || !ipv6_getaddrinfo || !ipv6_getnameinfo) {
1374 FreeLibrary(ipv6_dll);
1375 ipv6_dll = NULL;
1376 } else
1377 break;
1378 }
1379 if (!ipv6_freeaddrinfo || !ipv6_getaddrinfo || !ipv6_getnameinfo) {
1380 ipv6_freeaddrinfo = freeaddrinfo_stub;
1381 ipv6_getaddrinfo = getaddrinfo_stub;
1382 ipv6_getnameinfo = getnameinfo_stub;
1383 }
1384
1385 atexit(socket_cleanup);
1386 initialized = 1;
1387 }
1388
1389 #undef gethostname
1390 int mingw_gethostname(char *name, int namelen)
1391 {
1392 ensure_socket_initialization();
1393 return gethostname(name, namelen);
1394 }
1395
1396 #undef gethostbyname
1397 struct hostent *mingw_gethostbyname(const char *host)
1398 {
1399 ensure_socket_initialization();
1400 return gethostbyname(host);
1401 }
1402
1403 void mingw_freeaddrinfo(struct addrinfo *res)
1404 {
1405 ipv6_freeaddrinfo(res);
1406 }
1407
1408 int mingw_getaddrinfo(const char *node, const char *service,
1409 const struct addrinfo *hints, struct addrinfo **res)
1410 {
1411 ensure_socket_initialization();
1412 return ipv6_getaddrinfo(node, service, hints, res);
1413 }
1414
1415 int mingw_getnameinfo(const struct sockaddr *sa, socklen_t salen,
1416 char *host, DWORD hostlen, char *serv, DWORD servlen,
1417 int flags)
1418 {
1419 ensure_socket_initialization();
1420 return ipv6_getnameinfo(sa, salen, host, hostlen, serv, servlen, flags);
1421 }
1422
1423 int mingw_socket(int domain, int type, int protocol)
1424 {
1425 int sockfd;
1426 SOCKET s;
1427
1428 ensure_socket_initialization();
1429 s = WSASocket(domain, type, protocol, NULL, 0, 0);
1430 if (s == INVALID_SOCKET) {
1431 /*
1432 * WSAGetLastError() values are regular BSD error codes
1433 * biased by WSABASEERR.
1434 * However, strerror() does not know about networking
1435 * specific errors, which are values beginning at 38 or so.
1436 * Therefore, we choose to leave the biased error code
1437 * in errno so that _if_ someone looks up the code somewhere,
1438 * then it is at least the number that are usually listed.
1439 */
1440 errno = WSAGetLastError();
1441 return -1;
1442 }
1443 /* convert into a file descriptor */
1444 if ((sockfd = _open_osfhandle(s, O_RDWR|O_BINARY)) < 0) {
1445 closesocket(s);
1446 return error("unable to make a socket file descriptor: %s",
1447 strerror(errno));
1448 }
1449 return sockfd;
1450 }
1451
1452 #undef connect
1453 int mingw_connect(int sockfd, struct sockaddr *sa, size_t sz)
1454 {
1455 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
1456 return connect(s, sa, sz);
1457 }
1458
1459 #undef bind
1460 int mingw_bind(int sockfd, struct sockaddr *sa, size_t sz)
1461 {
1462 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
1463 return bind(s, sa, sz);
1464 }
1465
1466 #undef setsockopt
1467 int mingw_setsockopt(int sockfd, int lvl, int optname, void *optval, int optlen)
1468 {
1469 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
1470 return setsockopt(s, lvl, optname, (const char*)optval, optlen);
1471 }
1472
1473 #undef shutdown
1474 int mingw_shutdown(int sockfd, int how)
1475 {
1476 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
1477 return shutdown(s, how);
1478 }
1479
1480 #undef listen
1481 int mingw_listen(int sockfd, int backlog)
1482 {
1483 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
1484 return listen(s, backlog);
1485 }
1486
1487 #undef accept
1488 int mingw_accept(int sockfd1, struct sockaddr *sa, socklen_t *sz)
1489 {
1490 int sockfd2;
1491
1492 SOCKET s1 = (SOCKET)_get_osfhandle(sockfd1);
1493 SOCKET s2 = accept(s1, sa, sz);
1494
1495 /* convert into a file descriptor */
1496 if ((sockfd2 = _open_osfhandle(s2, O_RDWR|O_BINARY)) < 0) {
1497 int err = errno;
1498 closesocket(s2);
1499 return error("unable to make a socket file descriptor: %s",
1500 strerror(err));
1501 }
1502 return sockfd2;
1503 }
1504
1505 #undef rename
1506 int mingw_rename(const char *pold, const char *pnew)
1507 {
1508 DWORD attrs, gle;
1509 int tries = 0;
1510
1511 /*
1512 * Try native rename() first to get errno right.
1513 * It is based on MoveFile(), which cannot overwrite existing files.
1514 */
1515 if (!rename(pold, pnew))
1516 return 0;
1517 if (errno != EEXIST)
1518 return -1;
1519 repeat:
1520 if (MoveFileEx(pold, pnew, MOVEFILE_REPLACE_EXISTING))
1521 return 0;
1522 /* TODO: translate more errors */
1523 gle = GetLastError();
1524 if (gle == ERROR_ACCESS_DENIED &&
1525 (attrs = GetFileAttributes(pnew)) != INVALID_FILE_ATTRIBUTES) {
1526 if (attrs & FILE_ATTRIBUTE_DIRECTORY) {
1527 errno = EISDIR;
1528 return -1;
1529 }
1530 if ((attrs & FILE_ATTRIBUTE_READONLY) &&
1531 SetFileAttributes(pnew, attrs & ~FILE_ATTRIBUTE_READONLY)) {
1532 if (MoveFileEx(pold, pnew, MOVEFILE_REPLACE_EXISTING))
1533 return 0;
1534 gle = GetLastError();
1535 /* revert file attributes on failure */
1536 SetFileAttributes(pnew, attrs);
1537 }
1538 }
1539 if (tries < ARRAY_SIZE(delay) && gle == ERROR_ACCESS_DENIED) {
1540 /*
1541 * We assume that some other process had the source or
1542 * destination file open at the wrong moment and retry.
1543 * In order to give the other process a higher chance to
1544 * complete its operation, we give up our time slice now.
1545 * If we have to retry again, we do sleep a bit.
1546 */
1547 Sleep(delay[tries]);
1548 tries++;
1549 goto repeat;
1550 }
1551 if (gle == ERROR_ACCESS_DENIED &&
1552 ask_yes_no_if_possible("Rename from '%s' to '%s' failed. "
1553 "Should I try again?", pold, pnew))
1554 goto repeat;
1555
1556 errno = EACCES;
1557 return -1;
1558 }
1559
1560 /*
1561 * Note that this doesn't return the actual pagesize, but
1562 * the allocation granularity. If future Windows specific git code
1563 * needs the real getpagesize function, we need to find another solution.
1564 */
1565 int mingw_getpagesize(void)
1566 {
1567 SYSTEM_INFO si;
1568 GetSystemInfo(&si);
1569 return si.dwAllocationGranularity;
1570 }
1571
1572 struct passwd *getpwuid(int uid)
1573 {
1574 static char user_name[100];
1575 static struct passwd p;
1576
1577 DWORD len = sizeof(user_name);
1578 if (!GetUserName(user_name, &len))
1579 return NULL;
1580 p.pw_name = user_name;
1581 p.pw_gecos = "unknown";
1582 p.pw_dir = NULL;
1583 return &p;
1584 }
1585
1586 static HANDLE timer_event;
1587 static HANDLE timer_thread;
1588 static int timer_interval;
1589 static int one_shot;
1590 static sig_handler_t timer_fn = SIG_DFL;
1591
1592 /* The timer works like this:
1593 * The thread, ticktack(), is a trivial routine that most of the time
1594 * only waits to receive the signal to terminate. The main thread tells
1595 * the thread to terminate by setting the timer_event to the signalled
1596 * state.
1597 * But ticktack() interrupts the wait state after the timer's interval
1598 * length to call the signal handler.
1599 */
1600
1601 static unsigned __stdcall ticktack(void *dummy)
1602 {
1603 while (WaitForSingleObject(timer_event, timer_interval) == WAIT_TIMEOUT) {
1604 if (timer_fn == SIG_DFL)
1605 die("Alarm");
1606 if (timer_fn != SIG_IGN)
1607 timer_fn(SIGALRM);
1608 if (one_shot)
1609 break;
1610 }
1611 return 0;
1612 }
1613
1614 static int start_timer_thread(void)
1615 {
1616 timer_event = CreateEvent(NULL, FALSE, FALSE, NULL);
1617 if (timer_event) {
1618 timer_thread = (HANDLE) _beginthreadex(NULL, 0, ticktack, NULL, 0, NULL);
1619 if (!timer_thread )
1620 return errno = ENOMEM,
1621 error("cannot start timer thread");
1622 } else
1623 return errno = ENOMEM,
1624 error("cannot allocate resources for timer");
1625 return 0;
1626 }
1627
1628 static void stop_timer_thread(void)
1629 {
1630 if (timer_event)
1631 SetEvent(timer_event); /* tell thread to terminate */
1632 if (timer_thread) {
1633 int rc = WaitForSingleObject(timer_thread, 1000);
1634 if (rc == WAIT_TIMEOUT)
1635 error("timer thread did not terminate timely");
1636 else if (rc != WAIT_OBJECT_0)
1637 error("waiting for timer thread failed: %lu",
1638 GetLastError());
1639 CloseHandle(timer_thread);
1640 }
1641 if (timer_event)
1642 CloseHandle(timer_event);
1643 timer_event = NULL;
1644 timer_thread = NULL;
1645 }
1646
1647 static inline int is_timeval_eq(const struct timeval *i1, const struct timeval *i2)
1648 {
1649 return i1->tv_sec == i2->tv_sec && i1->tv_usec == i2->tv_usec;
1650 }
1651
1652 int setitimer(int type, struct itimerval *in, struct itimerval *out)
1653 {
1654 static const struct timeval zero;
1655 static int atexit_done;
1656
1657 if (out != NULL)
1658 return errno = EINVAL,
1659 error("setitimer param 3 != NULL not implemented");
1660 if (!is_timeval_eq(&in->it_interval, &zero) &&
1661 !is_timeval_eq(&in->it_interval, &in->it_value))
1662 return errno = EINVAL,
1663 error("setitimer: it_interval must be zero or eq it_value");
1664
1665 if (timer_thread)
1666 stop_timer_thread();
1667
1668 if (is_timeval_eq(&in->it_value, &zero) &&
1669 is_timeval_eq(&in->it_interval, &zero))
1670 return 0;
1671
1672 timer_interval = in->it_value.tv_sec * 1000 + in->it_value.tv_usec / 1000;
1673 one_shot = is_timeval_eq(&in->it_interval, &zero);
1674 if (!atexit_done) {
1675 atexit(stop_timer_thread);
1676 atexit_done = 1;
1677 }
1678 return start_timer_thread();
1679 }
1680
1681 int sigaction(int sig, struct sigaction *in, struct sigaction *out)
1682 {
1683 if (sig != SIGALRM)
1684 return errno = EINVAL,
1685 error("sigaction only implemented for SIGALRM");
1686 if (out != NULL)
1687 return errno = EINVAL,
1688 error("sigaction: param 3 != NULL not implemented");
1689
1690 timer_fn = in->sa_handler;
1691 return 0;
1692 }
1693
1694 #undef signal
1695 sig_handler_t mingw_signal(int sig, sig_handler_t handler)
1696 {
1697 sig_handler_t old = timer_fn;
1698 if (sig != SIGALRM)
1699 return signal(sig, handler);
1700 timer_fn = handler;
1701 return old;
1702 }
1703
1704 static const char *make_backslash_path(const char *path)
1705 {
1706 static char buf[PATH_MAX + 1];
1707 char *c;
1708
1709 if (strlcpy(buf, path, PATH_MAX) >= PATH_MAX)
1710 die("Too long path: %.*s", 60, path);
1711
1712 for (c = buf; *c; c++) {
1713 if (*c == '/')
1714 *c = '\\';
1715 }
1716 return buf;
1717 }
1718
1719 void mingw_open_html(const char *unixpath)
1720 {
1721 const char *htmlpath = make_backslash_path(unixpath);
1722 typedef HINSTANCE (WINAPI *T)(HWND, const char *,
1723 const char *, const char *, const char *, INT);
1724 T ShellExecute;
1725 HMODULE shell32;
1726 int r;
1727
1728 shell32 = LoadLibrary("shell32.dll");
1729 if (!shell32)
1730 die("cannot load shell32.dll");
1731 ShellExecute = (T)GetProcAddress(shell32, "ShellExecuteA");
1732 if (!ShellExecute)
1733 die("cannot run browser");
1734
1735 printf("Launching default browser to display HTML ...\n");
1736 r = (int)ShellExecute(NULL, "open", htmlpath, NULL, "\\", SW_SHOWNORMAL);
1737 FreeLibrary(shell32);
1738 /* see the MSDN documentation referring to the result codes here */
1739 if (r <= 32) {
1740 die("failed to launch browser for %.*s", MAX_PATH, unixpath);
1741 }
1742 }
1743
1744 int link(const char *oldpath, const char *newpath)
1745 {
1746 typedef BOOL (WINAPI *T)(const char*, const char*, LPSECURITY_ATTRIBUTES);
1747 static T create_hard_link = NULL;
1748 if (!create_hard_link) {
1749 create_hard_link = (T) GetProcAddress(
1750 GetModuleHandle("kernel32.dll"), "CreateHardLinkA");
1751 if (!create_hard_link)
1752 create_hard_link = (T)-1;
1753 }
1754 if (create_hard_link == (T)-1) {
1755 errno = ENOSYS;
1756 return -1;
1757 }
1758 if (!create_hard_link(newpath, oldpath, NULL)) {
1759 errno = err_win_to_posix(GetLastError());
1760 return -1;
1761 }
1762 return 0;
1763 }
1764
1765 char *getpass(const char *prompt)
1766 {
1767 struct strbuf buf = STRBUF_INIT;
1768
1769 fputs(prompt, stderr);
1770 for (;;) {
1771 char c = _getch();
1772 if (c == '\r' || c == '\n')
1773 break;
1774 strbuf_addch(&buf, c);
1775 }
1776 fputs("\n", stderr);
1777 return strbuf_detach(&buf, NULL);
1778 }
1779
1780 pid_t waitpid(pid_t pid, int *status, unsigned options)
1781 {
1782 HANDLE h = OpenProcess(SYNCHRONIZE | PROCESS_QUERY_INFORMATION,
1783 FALSE, pid);
1784 if (!h) {
1785 errno = ECHILD;
1786 return -1;
1787 }
1788
1789 if (pid > 0 && options & WNOHANG) {
1790 if (WAIT_OBJECT_0 != WaitForSingleObject(h, 0)) {
1791 CloseHandle(h);
1792 return 0;
1793 }
1794 options &= ~WNOHANG;
1795 }
1796
1797 if (options == 0) {
1798 struct pinfo_t **ppinfo;
1799 if (WaitForSingleObject(h, INFINITE) != WAIT_OBJECT_0) {
1800 CloseHandle(h);
1801 return 0;
1802 }
1803
1804 if (status)
1805 GetExitCodeProcess(h, (LPDWORD)status);
1806
1807 EnterCriticalSection(&pinfo_cs);
1808
1809 ppinfo = &pinfo;
1810 while (*ppinfo) {
1811 struct pinfo_t *info = *ppinfo;
1812 if (info->pid == pid) {
1813 CloseHandle(info->proc);
1814 *ppinfo = info->next;
1815 free(info);
1816 break;
1817 }
1818 ppinfo = &info->next;
1819 }
1820
1821 LeaveCriticalSection(&pinfo_cs);
1822
1823 CloseHandle(h);
1824 return pid;
1825 }
1826 CloseHandle(h);
1827
1828 errno = EINVAL;
1829 return -1;
1830 }
1831
1832 const char *get_windows_home_directory()
1833 {
1834 static const char *home_directory = NULL;
1835 struct strbuf buf = STRBUF_INIT;
1836
1837 if (home_directory)
1838 return home_directory;
1839
1840 home_directory = getenv("HOME");
1841 if (home_directory && *home_directory)
1842 return home_directory;
1843
1844 strbuf_addf(&buf, "%s/%s", getenv("HOMEDRIVE"), getenv("HOMEPATH"));
1845 home_directory = strbuf_detach(&buf, NULL);
1846
1847 return home_directory;
1848 }
1849
1850 int mingw_offset_1st_component(const char *path)
1851 {
1852 if (has_dos_drive_prefix(path))
1853 return 2 + is_dir_sep(path[2]);
1854
1855 /* unc paths */
1856 if (is_dir_sep(path[0]) && is_dir_sep(path[1])) {
1857
1858 /* skip server name */
1859 char *pos = strpbrk(path + 2, "\\/");
1860 if (!pos)
1861 return 0;
1862
1863 do {
1864 pos++;
1865 } while (*pos && !is_dir_sep(*pos));
1866
1867 return pos - path;
1868 }
1869
1870 return is_dir_sep(path[0]);
1871 }
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