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Do not strip CR when grepping HTTP headers.
[git/mingw/4msysgit.git] / compat / mingw.c
blobb0ad9192fbaf38dae249eb15e32259251244c836
1 #include "../git-compat-util.h"
2 #include "win32.h"
3 #include <conio.h>
4 #include "../strbuf.h"
5 #include "../cache.h"
6 #include "../run-command.h"
7
8 unsigned int _CRT_fmode = _O_BINARY;
9 static const int delay[] = { 0, 1, 10, 20, 40 };
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 int make_hidden(const char *path)
125 {
126 DWORD attribs = GetFileAttributes(path);
127 if (SetFileAttributes(path, FILE_ATTRIBUTE_HIDDEN | attribs))
128 return 0;
129 errno = err_win_to_posix(GetLastError());
130 return -1;
131 }
132
133 void mingw_mark_as_git_dir(const char *dir)
134 {
135 if (hide_dotfiles != HIDE_DOTFILES_FALSE && !is_bare_repository() &&
136 make_hidden(dir))
137 warning("Failed to make '%s' hidden", dir);
138 git_config_set("core.hideDotFiles",
139 hide_dotfiles == HIDE_DOTFILES_FALSE ? "false" :
140 (hide_dotfiles == HIDE_DOTFILES_DOTGITONLY ?
141 "dotGitOnly" : "true"));
142 }
143
144 #undef mkdir
145 int mingw_mkdir(const char *path, int mode)
146 {
147 int ret = mkdir(path);
148 if (!ret && hide_dotfiles == HIDE_DOTFILES_TRUE) {
149 /*
150 * In Windows a file or dir starting with a dot is not
151 * automatically hidden. So lets mark it as hidden when
152 * such a directory is created.
153 */
154 const char *start = basename((char*)path);
155 if (*start == '.')
156 return make_hidden(path);
157 }
158 return ret;
159 }
160
161 static int ask_user_yes_no(const char *format, ...)
162 {
163 char answer[5];
164 char question[4096];
165 const char *retry_hook[] = { NULL, NULL, NULL };
166 va_list args;
167
168 if ((retry_hook[0] = getenv("GIT_ASK_YESNO"))) {
169
170 va_start(args, format);
171 vsnprintf(question, sizeof(question), format, args);
172 va_end(args);
173
174 retry_hook[1] = question;
175 return !run_command_v_opt(retry_hook, 0);
176 }
177
178 if (!isatty(_fileno(stdin)) || !isatty(_fileno(stderr)))
179 return 0;
180
181 while (1) {
182 va_start(args, format);
183 vfprintf(stderr, format, args);
184 va_end(args);
185 fprintf(stderr, " (y/n)? ");
186
187 if (fgets(answer, sizeof(answer), stdin)) {
188 /* remove the newline */
189 if (answer[strlen(answer)-2] == '\r')
190 answer[strlen(answer)-2] = '\0';
191 if (answer[strlen(answer)-1] == '\n')
192 answer[strlen(answer)-1] = '\0';
193 } else
194 return 0;
195
196 if (answer[0] == 'y' && strlen(answer) == 1)
197 return 1;
198 if (!strncasecmp(answer, "yes", sizeof(answer)))
199 return 1;
200 if (answer[0] == 'n' && strlen(answer) == 1)
201 return 0;
202 if (!strncasecmp(answer, "no", sizeof(answer)))
203 return 0;
204 fprintf(stderr, "I did not understand your answer: '%s'\n",
205 answer);
206 }
207 }
208
209 #undef unlink
210 int mingw_unlink(const char *pathname)
211 {
212 int ret, tries = 0;
213
214 /* read-only files cannot be removed */
215 chmod(pathname, 0666);
216 while ((ret = unlink(pathname)) == -1 && tries < ARRAY_SIZE(delay)) {
217 if (errno != EACCES)
218 break;
219 /*
220 * We assume that some other process had the source or
221 * destination file open at the wrong moment and retry.
222 * In order to give the other process a higher chance to
223 * complete its operation, we give up our time slice now.
224 * If we have to retry again, we do sleep a bit.
225 */
226 Sleep(delay[tries]);
227 tries++;
228 }
229 while (ret == -1 && errno == EACCES &&
230 ask_user_yes_no("Unlink of file '%s' failed. "
231 "Should I try again?", pathname))
232 ret = unlink(pathname);
233 return ret;
234 }
235
236 static int is_dir_empty(const char *path)
237 {
238 struct strbuf buf = STRBUF_INIT;
239 WIN32_FIND_DATAA findbuf;
240 HANDLE handle;
241
242 strbuf_addf(&buf, "%s\\*", path);
243 handle = FindFirstFileA(buf.buf, &findbuf);
244 if (handle == INVALID_HANDLE_VALUE) {
245 strbuf_release(&buf);
246 return GetLastError() == ERROR_NO_MORE_FILES;
247 }
248
249 while (!strcmp(findbuf.cFileName, ".") ||
250 !strcmp(findbuf.cFileName, ".."))
251 if (!FindNextFile(handle, &findbuf)) {
252 strbuf_release(&buf);
253 return GetLastError() == ERROR_NO_MORE_FILES;
254 }
255 FindClose(handle);
256 strbuf_release(&buf);
257 return 0;
258 }
259
260 #undef rmdir
261 int mingw_rmdir(const char *pathname)
262 {
263 int ret, tries = 0;
264
265 while ((ret = rmdir(pathname)) == -1 && tries < ARRAY_SIZE(delay)) {
266 if (errno != EACCES)
267 break;
268 if (!is_dir_empty(pathname)) {
269 errno = ENOTEMPTY;
270 break;
271 }
272 /*
273 * We assume that some other process had the source or
274 * destination file open at the wrong moment and retry.
275 * In order to give the other process a higher chance to
276 * complete its operation, we give up our time slice now.
277 * If we have to retry again, we do sleep a bit.
278 */
279 Sleep(delay[tries]);
280 tries++;
281 }
282 while (ret == -1 && errno == EACCES &&
283 ask_user_yes_no("Deletion of directory '%s' failed. "
284 "Should I try again?", pathname))
285 ret = rmdir(pathname);
286 return ret;
287 }
288
289 #undef open
290 int mingw_open (const char *filename, int oflags, ...)
291 {
292 va_list args;
293 unsigned mode;
294 int fd;
295
296 va_start(args, oflags);
297 mode = va_arg(args, int);
298 va_end(args);
299
300 if (!strcmp(filename, "/dev/null"))
301 filename = "nul";
302
303 fd = open(filename, oflags, mode);
304
305 if (fd < 0 && (oflags & O_CREAT) && errno == EACCES) {
306 DWORD attrs = GetFileAttributes(filename);
307 if (attrs != INVALID_FILE_ATTRIBUTES && (attrs & FILE_ATTRIBUTE_DIRECTORY))
308 errno = EISDIR;
309 }
310 if ((oflags & O_CREAT) && fd >= 0 &&
311 hide_dotfiles == HIDE_DOTFILES_TRUE) {
312 /*
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 file is created.
316 */
317 const char *start = basename((char*)filename);
318 if (*start == '.' && make_hidden(filename))
319 warning("Could not mark '%s' as hidden.", filename);
320 }
321 return fd;
322 }
323
324 #undef write
325 ssize_t mingw_write(int fd, const void *buf, size_t count)
326 {
327 /*
328 * While write() calls to a file on a local disk are translated
329 * into WriteFile() calls with a maximum size of 64KB on Windows
330 * XP and 256KB on Vista, no such cap is placed on writes to
331 * files over the network on Windows XP. Unfortunately, there
332 * seems to be a limit of 32MB-28KB on X64 and 64MB-32KB on x86;
333 * bigger writes fail on Windows XP.
334 * So we cap to a nice 31MB here to avoid write failures over
335 * the net without changing the number of WriteFile() calls in
336 * the local case.
337 */
338 return write(fd, buf, min(count, 31 * 1024 * 1024));
339 }
340
341 #undef fopen
342 FILE *mingw_fopen (const char *filename, const char *otype)
343 {
344 int hide = 0;
345 FILE *file;
346 if (hide_dotfiles == HIDE_DOTFILES_TRUE &&
347 basename((char*)filename)[0] == '.')
348 hide = access(filename, F_OK);
349 if (!strcmp(filename, "/dev/null"))
350 filename = "nul";
351 file = fopen(filename, otype);
352 if (file && hide && make_hidden(filename))
353 warning("Could not mark '%s' as hidden.", filename);
354 return file;
355 }
356
357 #undef freopen
358 FILE *mingw_freopen (const char *filename, const char *otype, FILE *stream)
359 {
360 int hide = 0;
361 FILE *file;
362 if (hide_dotfiles == HIDE_DOTFILES_TRUE &&
363 basename((char*)filename)[0] == '.')
364 hide = access(filename, F_OK);
365 if (filename && !strcmp(filename, "/dev/null"))
366 filename = "nul";
367 file = freopen(filename, otype, stream);
368 if (file && hide && make_hidden(filename))
369 warning("Could not mark '%s' as hidden.", filename);
370 return file;
371 }
372
373 /*
374 * The unit of FILETIME is 100-nanoseconds since January 1, 1601, UTC.
375 * Returns the 100-nanoseconds ("hekto nanoseconds") since the epoch.
376 */
377 static inline long long filetime_to_hnsec(const FILETIME *ft)
378 {
379 long long winTime = ((long long)ft->dwHighDateTime << 32) + ft->dwLowDateTime;
380 /* Windows to Unix Epoch conversion */
381 return winTime - 116444736000000000LL;
382 }
383
384 static inline time_t filetime_to_time_t(const FILETIME *ft)
385 {
386 return (time_t)(filetime_to_hnsec(ft) / 10000000);
387 }
388
389 /* We keep the do_lstat code in a separate function to avoid recursion.
390 * When a path ends with a slash, the stat will fail with ENOENT. In
391 * this case, we strip the trailing slashes and stat again.
392 *
393 * If follow is true then act like stat() and report on the link
394 * target. Otherwise report on the link itself.
395 */
396 static int do_lstat(int follow, const char *file_name, struct stat *buf)
397 {
398 WIN32_FILE_ATTRIBUTE_DATA fdata;
399
400 if (!(errno = get_file_attr(file_name, &fdata))) {
401 buf->st_ino = 0;
402 buf->st_gid = 0;
403 buf->st_uid = 0;
404 buf->st_nlink = 1;
405 buf->st_mode = file_attr_to_st_mode(fdata.dwFileAttributes);
406 buf->st_size = fdata.nFileSizeLow |
407 (((off_t)fdata.nFileSizeHigh)<<32);
408 buf->st_dev = buf->st_rdev = 0; /* not used by Git */
409 buf->st_atime = filetime_to_time_t(&(fdata.ftLastAccessTime));
410 buf->st_mtime = filetime_to_time_t(&(fdata.ftLastWriteTime));
411 buf->st_ctime = filetime_to_time_t(&(fdata.ftCreationTime));
412 if (fdata.dwFileAttributes & FILE_ATTRIBUTE_REPARSE_POINT) {
413 WIN32_FIND_DATAA findbuf;
414 HANDLE handle = FindFirstFileA(file_name, &findbuf);
415 if (handle != INVALID_HANDLE_VALUE) {
416 if ((findbuf.dwFileAttributes & FILE_ATTRIBUTE_REPARSE_POINT) &&
417 (findbuf.dwReserved0 == IO_REPARSE_TAG_SYMLINK)) {
418 if (follow) {
419 char buffer[MAXIMUM_REPARSE_DATA_BUFFER_SIZE];
420 buf->st_size = readlink(file_name, buffer, MAXIMUM_REPARSE_DATA_BUFFER_SIZE);
421 } else {
422 buf->st_mode = S_IFLNK;
423 }
424 buf->st_mode |= S_IREAD;
425 if (!(findbuf.dwFileAttributes & FILE_ATTRIBUTE_READONLY))
426 buf->st_mode |= S_IWRITE;
427 }
428 FindClose(handle);
429 }
430 }
431 return 0;
432 }
433 return -1;
434 }
435
436 /* We provide our own lstat/fstat functions, since the provided
437 * lstat/fstat functions are so slow. These stat functions are
438 * tailored for Git's usage (read: fast), and are not meant to be
439 * complete. Note that Git stat()s are redirected to mingw_lstat()
440 * too, since Windows doesn't really handle symlinks that well.
441 */
442 static int do_stat_internal(int follow, const char *file_name, struct stat *buf)
443 {
444 int namelen;
445 static char alt_name[PATH_MAX];
446
447 if (!do_lstat(follow, file_name, buf))
448 return 0;
449
450 /* if file_name ended in a '/', Windows returned ENOENT;
451 * try again without trailing slashes
452 */
453 if (errno != ENOENT)
454 return -1;
455
456 namelen = strlen(file_name);
457 if (namelen && file_name[namelen-1] != '/')
458 return -1;
459 while (namelen && file_name[namelen-1] == '/')
460 --namelen;
461 if (!namelen || namelen >= PATH_MAX)
462 return -1;
463
464 memcpy(alt_name, file_name, namelen);
465 alt_name[namelen] = 0;
466 return do_lstat(follow, alt_name, buf);
467 }
468
469 int mingw_lstat(const char *file_name, struct stat *buf)
470 {
471 return do_stat_internal(0, file_name, buf);
472 }
473 int mingw_stat(const char *file_name, struct stat *buf)
474 {
475 return do_stat_internal(1, file_name, buf);
476 }
477
478 #undef fstat
479 int mingw_fstat(int fd, struct stat *buf)
480 {
481 HANDLE fh = (HANDLE)_get_osfhandle(fd);
482 BY_HANDLE_FILE_INFORMATION fdata;
483
484 if (fh == INVALID_HANDLE_VALUE) {
485 errno = EBADF;
486 return -1;
487 }
488 /* direct non-file handles to MS's fstat() */
489 if (GetFileType(fh) != FILE_TYPE_DISK)
490 return _fstati64(fd, buf);
491
492 if (GetFileInformationByHandle(fh, &fdata)) {
493 buf->st_ino = 0;
494 buf->st_gid = 0;
495 buf->st_uid = 0;
496 buf->st_nlink = 1;
497 buf->st_mode = file_attr_to_st_mode(fdata.dwFileAttributes);
498 buf->st_size = fdata.nFileSizeLow |
499 (((off_t)fdata.nFileSizeHigh)<<32);
500 buf->st_dev = buf->st_rdev = 0; /* not used by Git */
501 buf->st_atime = filetime_to_time_t(&(fdata.ftLastAccessTime));
502 buf->st_mtime = filetime_to_time_t(&(fdata.ftLastWriteTime));
503 buf->st_ctime = filetime_to_time_t(&(fdata.ftCreationTime));
504 return 0;
505 }
506 errno = EBADF;
507 return -1;
508 }
509
510 static inline void time_t_to_filetime(time_t t, FILETIME *ft)
511 {
512 long long winTime = t * 10000000LL + 116444736000000000LL;
513 ft->dwLowDateTime = winTime;
514 ft->dwHighDateTime = winTime >> 32;
515 }
516
517 int mingw_utime (const char *file_name, const struct utimbuf *times)
518 {
519 FILETIME mft, aft;
520 int fh, rc;
521
522 /* must have write permission */
523 DWORD attrs = GetFileAttributes(file_name);
524 if (attrs != INVALID_FILE_ATTRIBUTES &&
525 (attrs & FILE_ATTRIBUTE_READONLY)) {
526 /* ignore errors here; open() will report them */
527 SetFileAttributes(file_name, attrs & ~FILE_ATTRIBUTE_READONLY);
528 }
529
530 if ((fh = open(file_name, O_RDWR | O_BINARY)) < 0) {
531 rc = -1;
532 goto revert_attrs;
533 }
534
535 if (times) {
536 time_t_to_filetime(times->modtime, &mft);
537 time_t_to_filetime(times->actime, &aft);
538 } else {
539 GetSystemTimeAsFileTime(&mft);
540 aft = mft;
541 }
542 if (!SetFileTime((HANDLE)_get_osfhandle(fh), NULL, &aft, &mft)) {
543 errno = EINVAL;
544 rc = -1;
545 } else
546 rc = 0;
547 close(fh);
548
549 revert_attrs:
550 if (attrs != INVALID_FILE_ATTRIBUTES &&
551 (attrs & FILE_ATTRIBUTE_READONLY)) {
552 /* ignore errors again */
553 SetFileAttributes(file_name, attrs);
554 }
555 return rc;
556 }
557
558 unsigned int sleep (unsigned int seconds)
559 {
560 Sleep(seconds*1000);
561 return 0;
562 }
563
564 int mkstemp(char *template)
565 {
566 char *filename = mktemp(template);
567 if (filename == NULL)
568 return -1;
569 return open(filename, O_RDWR | O_CREAT, 0600);
570 }
571
572 int gettimeofday(struct timeval *tv, void *tz)
573 {
574 FILETIME ft;
575 long long hnsec;
576
577 GetSystemTimeAsFileTime(&ft);
578 hnsec = filetime_to_hnsec(&ft);
579 tv->tv_sec = hnsec / 10000000;
580 tv->tv_usec = (hnsec % 10000000) / 10;
581 return 0;
582 }
583
584 int pipe(int filedes[2])
585 {
586 HANDLE h[2];
587
588 /* this creates non-inheritable handles */
589 if (!CreatePipe(&h[0], &h[1], NULL, 8192)) {
590 errno = err_win_to_posix(GetLastError());
591 return -1;
592 }
593 filedes[0] = _open_osfhandle((int)h[0], O_NOINHERIT);
594 if (filedes[0] < 0) {
595 CloseHandle(h[0]);
596 CloseHandle(h[1]);
597 return -1;
598 }
599 filedes[1] = _open_osfhandle((int)h[1], O_NOINHERIT);
600 if (filedes[0] < 0) {
601 close(filedes[0]);
602 CloseHandle(h[1]);
603 return -1;
604 }
605 return 0;
606 }
607
608 int poll(struct pollfd *ufds, unsigned int nfds, int timeout)
609 {
610 int i, pending;
611
612 if (timeout >= 0) {
613 if (nfds == 0) {
614 Sleep(timeout);
615 return 0;
616 }
617 return errno = EINVAL, error("poll timeout not supported");
618 }
619
620 /* When there is only one fd to wait for, then we pretend that
621 * input is available and let the actual wait happen when the
622 * caller invokes read().
623 */
624 if (nfds == 1) {
625 if (!(ufds[0].events & POLLIN))
626 return errno = EINVAL, error("POLLIN not set");
627 ufds[0].revents = POLLIN;
628 return 0;
629 }
630
631 repeat:
632 pending = 0;
633 for (i = 0; i < nfds; i++) {
634 DWORD avail = 0;
635 HANDLE h = (HANDLE) _get_osfhandle(ufds[i].fd);
636 if (h == INVALID_HANDLE_VALUE)
637 return -1; /* errno was set */
638
639 if (!(ufds[i].events & POLLIN))
640 return errno = EINVAL, error("POLLIN not set");
641
642 /* this emulation works only for pipes */
643 if (!PeekNamedPipe(h, NULL, 0, NULL, &avail, NULL)) {
644 int err = GetLastError();
645 if (err == ERROR_BROKEN_PIPE) {
646 ufds[i].revents = POLLHUP;
647 pending++;
648 } else {
649 errno = EINVAL;
650 return error("PeekNamedPipe failed,"
651 " GetLastError: %u", err);
652 }
653 } else if (avail) {
654 ufds[i].revents = POLLIN;
655 pending++;
656 } else
657 ufds[i].revents = 0;
658 }
659 if (!pending) {
660 /* The only times that we spin here is when the process
661 * that is connected through the pipes is waiting for
662 * its own input data to become available. But since
663 * the process (pack-objects) is itself CPU intensive,
664 * it will happily pick up the time slice that we are
665 * relinquishing here.
666 */
667 Sleep(0);
668 goto repeat;
669 }
670 return 0;
671 }
672
673 struct tm *gmtime_r(const time_t *timep, struct tm *result)
674 {
675 /* gmtime() in MSVCRT.DLL is thread-safe, but not reentrant */
676 memcpy(result, gmtime(timep), sizeof(struct tm));
677 return result;
678 }
679
680 struct tm *localtime_r(const time_t *timep, struct tm *result)
681 {
682 /* localtime() in MSVCRT.DLL is thread-safe, but not reentrant */
683 memcpy(result, localtime(timep), sizeof(struct tm));
684 return result;
685 }
686
687 #undef getcwd
688 char *mingw_getcwd(char *pointer, int len)
689 {
690 int i;
691 char *ret = getcwd(pointer, len);
692 if (!ret)
693 return ret;
694 for (i = 0; pointer[i]; i++)
695 if (pointer[i] == '\\')
696 pointer[i] = '/';
697 return ret;
698 }
699
700 #undef getenv
701 char *mingw_getenv(const char *name)
702 {
703 char *result = getenv(name);
704 if (!result) {
705 if (!strcmp(name, "TMPDIR")) {
706 /* on Windows it is TMP and TEMP */
707 result = getenv("TMP");
708 if (!result)
709 result = getenv("TEMP");
710 } else if (!strcmp(name, "TERM")) {
711 /* simulate TERM to enable auto-color (see color.c) */
712 result = "winansi";
713 }
714 }
715 return result;
716 }
717
718 /*
719 * See http://msdn2.microsoft.com/en-us/library/17w5ykft(vs.71).aspx
720 * (Parsing C++ Command-Line Arguments)
721 */
722 static const char *quote_arg(const char *arg)
723 {
724 /* count chars to quote */
725 int len = 0, n = 0;
726 int force_quotes = 0;
727 char *q, *d;
728 const char *p = arg;
729 if (!*p) force_quotes = 1;
730 while (*p) {
731 if (isspace(*p) || *p == '*' || *p == '?' || *p == '{' || *p == '\'')
732 force_quotes = 1;
733 else if (*p == '"')
734 n++;
735 else if (*p == '\\') {
736 int count = 0;
737 while (*p == '\\') {
738 count++;
739 p++;
740 len++;
741 }
742 if (*p == '"')
743 n += count*2 + 1;
744 continue;
745 }
746 len++;
747 p++;
748 }
749 if (!force_quotes && n == 0)
750 return arg;
751
752 /* insert \ where necessary */
753 d = q = xmalloc(len+n+3);
754 *d++ = '"';
755 while (*arg) {
756 if (*arg == '"')
757 *d++ = '\\';
758 else if (*arg == '\\') {
759 int count = 0;
760 while (*arg == '\\') {
761 count++;
762 *d++ = *arg++;
763 }
764 if (*arg == '"') {
765 while (count-- > 0)
766 *d++ = '\\';
767 *d++ = '\\';
768 }
769 }
770 *d++ = *arg++;
771 }
772 *d++ = '"';
773 *d++ = 0;
774 return q;
775 }
776
777 static const char *parse_interpreter(const char *cmd)
778 {
779 static char buf[100];
780 char *p, *opt;
781 int n, fd;
782
783 /* don't even try a .exe */
784 n = strlen(cmd);
785 if (n >= 4 && !strcasecmp(cmd+n-4, ".exe"))
786 return NULL;
787
788 fd = open(cmd, O_RDONLY);
789 if (fd < 0)
790 return NULL;
791 n = read(fd, buf, sizeof(buf)-1);
792 close(fd);
793 if (n < 4) /* at least '#!/x' and not error */
794 return NULL;
795
796 if (buf[0] != '#' || buf[1] != '!')
797 return NULL;
798 buf[n] = '\0';
799 p = buf + strcspn(buf, "\r\n");
800 if (!*p)
801 return NULL;
802
803 *p = '\0';
804 if (!(p = strrchr(buf+2, '/')) && !(p = strrchr(buf+2, '\\')))
805 return NULL;
806 /* strip options */
807 if ((opt = strchr(p+1, ' ')))
808 *opt = '\0';
809 return p+1;
810 }
811
812 /*
813 * Splits the PATH into parts.
814 */
815 static char **get_path_split(void)
816 {
817 char *p, **path, *envpath = getenv("PATH");
818 int i, n = 0;
819
820 if (!envpath || !*envpath)
821 return NULL;
822
823 envpath = xstrdup(envpath);
824 p = envpath;
825 while (p) {
826 char *dir = p;
827 p = strchr(p, ';');
828 if (p) *p++ = '\0';
829 if (*dir) { /* not earlier, catches series of ; */
830 ++n;
831 }
832 }
833 if (!n)
834 return NULL;
835
836 path = xmalloc((n+1)*sizeof(char *));
837 p = envpath;
838 i = 0;
839 do {
840 if (*p)
841 path[i++] = xstrdup(p);
842 p = p+strlen(p)+1;
843 } while (i < n);
844 path[i] = NULL;
845
846 free(envpath);
847
848 return path;
849 }
850
851 static void free_path_split(char **path)
852 {
853 char **p = path;
854
855 if (!path)
856 return;
857
858 while (*p)
859 free(*p++);
860 free(path);
861 }
862
863 /*
864 * exe_only means that we only want to detect .exe files, but not scripts
865 * (which do not have an extension)
866 */
867 static char *lookup_prog(const char *dir, const char *cmd, int isexe, int exe_only)
868 {
869 char path[MAX_PATH];
870 snprintf(path, sizeof(path), "%s/%s.exe", dir, cmd);
871
872 if (!isexe && access(path, F_OK) == 0)
873 return xstrdup(path);
874 path[strlen(path)-4] = '\0';
875 if ((!exe_only || isexe) && access(path, F_OK) == 0)
876 if (!(GetFileAttributes(path) & FILE_ATTRIBUTE_DIRECTORY))
877 return xstrdup(path);
878 return NULL;
879 }
880
881 /*
882 * Determines the absolute path of cmd using the split path in path.
883 * If cmd contains a slash or backslash, no lookup is performed.
884 */
885 static char *path_lookup(const char *cmd, char **path, int exe_only)
886 {
887 char *prog = NULL;
888 int len = strlen(cmd);
889 int isexe = len >= 4 && !strcasecmp(cmd+len-4, ".exe");
890
891 if (strchr(cmd, '/') || strchr(cmd, '\\'))
892 prog = xstrdup(cmd);
893
894 while (!prog && *path)
895 prog = lookup_prog(*path++, cmd, isexe, exe_only);
896
897 return prog;
898 }
899
900 static int env_compare(const void *a, const void *b)
901 {
902 char *const *ea = a;
903 char *const *eb = b;
904 return strcasecmp(*ea, *eb);
905 }
906
907 static pid_t mingw_spawnve_fd(const char *cmd, const char **argv, char **env,
908 const char *dir,
909 int prepend_cmd, int fhin, int fhout, int fherr)
910 {
911 STARTUPINFO si;
912 PROCESS_INFORMATION pi;
913 struct strbuf envblk, args;
914 unsigned flags;
915 BOOL ret;
916
917 /* Determine whether or not we are associated to a console */
918 HANDLE cons = CreateFile("CONOUT$", GENERIC_WRITE,
919 FILE_SHARE_WRITE, NULL, OPEN_EXISTING,
920 FILE_ATTRIBUTE_NORMAL, NULL);
921 if (cons == INVALID_HANDLE_VALUE) {
922 /* There is no console associated with this process.
923 * Since the child is a console process, Windows
924 * would normally create a console window. But
925 * since we'll be redirecting std streams, we do
926 * not need the console.
927 * It is necessary to use DETACHED_PROCESS
928 * instead of CREATE_NO_WINDOW to make ssh
929 * recognize that it has no console.
930 */
931 flags = DETACHED_PROCESS;
932 } else {
933 /* There is already a console. If we specified
934 * DETACHED_PROCESS here, too, Windows would
935 * disassociate the child from the console.
936 * The same is true for CREATE_NO_WINDOW.
937 * Go figure!
938 */
939 flags = 0;
940 CloseHandle(cons);
941 }
942 memset(&si, 0, sizeof(si));
943 si.cb = sizeof(si);
944 si.dwFlags = STARTF_USESTDHANDLES;
945 si.hStdInput = (HANDLE) _get_osfhandle(fhin);
946 si.hStdOutput = (HANDLE) _get_osfhandle(fhout);
947 si.hStdError = (HANDLE) _get_osfhandle(fherr);
948
949 /* concatenate argv, quoting args as we go */
950 strbuf_init(&args, 0);
951 if (prepend_cmd) {
952 char *quoted = (char *)quote_arg(cmd);
953 strbuf_addstr(&args, quoted);
954 if (quoted != cmd)
955 free(quoted);
956 }
957 for (; *argv; argv++) {
958 char *quoted = (char *)quote_arg(*argv);
959 if (*args.buf)
960 strbuf_addch(&args, ' ');
961 strbuf_addstr(&args, quoted);
962 if (quoted != *argv)
963 free(quoted);
964 }
965
966 if (env) {
967 int count = 0;
968 char **e, **sorted_env;
969
970 for (e = env; *e; e++)
971 count++;
972
973 /* environment must be sorted */
974 sorted_env = xmalloc(sizeof(*sorted_env) * (count + 1));
975 memcpy(sorted_env, env, sizeof(*sorted_env) * (count + 1));
976 qsort(sorted_env, count, sizeof(*sorted_env), env_compare);
977
978 strbuf_init(&envblk, 0);
979 for (e = sorted_env; *e; e++) {
980 strbuf_addstr(&envblk, *e);
981 strbuf_addch(&envblk, '\0');
982 }
983 free(sorted_env);
984 }
985
986 memset(&pi, 0, sizeof(pi));
987 ret = CreateProcess(cmd, args.buf, NULL, NULL, TRUE, flags,
988 env ? envblk.buf : NULL, dir, &si, &pi);
989
990 if (env)
991 strbuf_release(&envblk);
992 strbuf_release(&args);
993
994 if (!ret) {
995 errno = ENOENT;
996 return -1;
997 }
998 CloseHandle(pi.hThread);
999 return (pid_t)pi.hProcess;
1000 }
1001
1002 static pid_t mingw_spawnve(const char *cmd, const char **argv, char **env,
1003 int prepend_cmd)
1004 {
1005 return mingw_spawnve_fd(cmd, argv, env, NULL, prepend_cmd, 0, 1, 2);
1006 }
1007
1008 pid_t mingw_spawnvpe(const char *cmd, const char **argv, char **env,
1009 const char *dir,
1010 int fhin, int fhout, int fherr)
1011 {
1012 pid_t pid;
1013 char **path = get_path_split();
1014 char *prog = path_lookup(cmd, path, 0);
1015
1016 if (!prog) {
1017 errno = ENOENT;
1018 pid = -1;
1019 }
1020 else {
1021 const char *interpr = parse_interpreter(prog);
1022
1023 if (interpr) {
1024 const char *argv0 = argv[0];
1025 char *iprog = path_lookup(interpr, path, 1);
1026 argv[0] = prog;
1027 if (!iprog) {
1028 errno = ENOENT;
1029 pid = -1;
1030 }
1031 else {
1032 pid = mingw_spawnve_fd(iprog, argv, env, dir, 1,
1033 fhin, fhout, fherr);
1034 free(iprog);
1035 }
1036 argv[0] = argv0;
1037 }
1038 else
1039 pid = mingw_spawnve_fd(prog, argv, env, dir, 0,
1040 fhin, fhout, fherr);
1041 free(prog);
1042 }
1043 free_path_split(path);
1044 return pid;
1045 }
1046
1047 static int try_shell_exec(const char *cmd, char *const *argv, char **env)
1048 {
1049 const char *interpr = parse_interpreter(cmd);
1050 char **path;
1051 char *prog;
1052 int pid = 0;
1053
1054 if (!interpr)
1055 return 0;
1056 path = get_path_split();
1057 prog = path_lookup(interpr, path, 1);
1058 if (prog) {
1059 int argc = 0;
1060 const char **argv2;
1061 while (argv[argc]) argc++;
1062 argv2 = xmalloc(sizeof(*argv) * (argc+1));
1063 argv2[0] = (char *)cmd; /* full path to the script file */
1064 memcpy(&argv2[1], &argv[1], sizeof(*argv) * argc);
1065 pid = mingw_spawnve(prog, argv2, env, 1);
1066 if (pid >= 0) {
1067 int status;
1068 if (waitpid(pid, &status, 0) < 0)
1069 status = 255;
1070 exit(status);
1071 }
1072 pid = 1; /* indicate that we tried but failed */
1073 free(prog);
1074 free(argv2);
1075 }
1076 free_path_split(path);
1077 return pid;
1078 }
1079
1080 static void mingw_execve(const char *cmd, char *const *argv, char *const *env)
1081 {
1082 /* check if git_command is a shell script */
1083 if (!try_shell_exec(cmd, argv, (char **)env)) {
1084 int pid, status;
1085
1086 pid = mingw_spawnve(cmd, (const char **)argv, (char **)env, 0);
1087 if (pid < 0)
1088 return;
1089 if (waitpid(pid, &status, 0) < 0)
1090 status = 255;
1091 exit(status);
1092 }
1093 }
1094
1095 void mingw_execvp(const char *cmd, char *const *argv)
1096 {
1097 char **path = get_path_split();
1098 char *prog = path_lookup(cmd, path, 0);
1099
1100 if (prog) {
1101 mingw_execve(prog, argv, environ);
1102 free(prog);
1103 } else
1104 errno = ENOENT;
1105
1106 free_path_split(path);
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 /*
1184 * Note, this isn't a complete replacement for getaddrinfo. It assumes
1185 * that service contains a numerical port, or that it it is null. It
1186 * does a simple search using gethostbyname, and returns one IPv4 host
1187 * if one was found.
1188 */
1189 static int WSAAPI getaddrinfo_stub(const char *node, const char *service,
1190 const struct addrinfo *hints,
1191 struct addrinfo **res)
1192 {
1193 struct hostent *h = gethostbyname(node);
1194 struct addrinfo *ai;
1195 struct sockaddr_in *sin;
1196
1197 if (!h)
1198 return WSAGetLastError();
1199
1200 ai = xmalloc(sizeof(struct addrinfo));
1201 *res = ai;
1202 ai->ai_flags = 0;
1203 ai->ai_family = AF_INET;
1204 ai->ai_socktype = hints->ai_socktype;
1205 switch (hints->ai_socktype) {
1206 case SOCK_STREAM:
1207 ai->ai_protocol = IPPROTO_TCP;
1208 break;
1209 case SOCK_DGRAM:
1210 ai->ai_protocol = IPPROTO_UDP;
1211 break;
1212 default:
1213 ai->ai_protocol = 0;
1214 break;
1215 }
1216 ai->ai_addrlen = sizeof(struct sockaddr_in);
1217 ai->ai_canonname = strdup(h->h_name);
1218
1219 sin = xmalloc(ai->ai_addrlen);
1220 memset(sin, 0, ai->ai_addrlen);
1221 sin->sin_family = AF_INET;
1222 if (service)
1223 sin->sin_port = htons(atoi(service));
1224 sin->sin_addr = *(struct in_addr *)h->h_addr;
1225 ai->ai_addr = (struct sockaddr *)sin;
1226 ai->ai_next = 0;
1227 return 0;
1228 }
1229
1230 static void WSAAPI freeaddrinfo_stub(struct addrinfo *res)
1231 {
1232 free(res->ai_canonname);
1233 free(res->ai_addr);
1234 free(res);
1235 }
1236
1237 static int WSAAPI getnameinfo_stub(const struct sockaddr *sa, socklen_t salen,
1238 char *host, DWORD hostlen,
1239 char *serv, DWORD servlen, int flags)
1240 {
1241 const struct sockaddr_in *sin = (const struct sockaddr_in *)sa;
1242 if (sa->sa_family != AF_INET)
1243 return EAI_FAMILY;
1244 if (!host && !serv)
1245 return EAI_NONAME;
1246
1247 if (host && hostlen > 0) {
1248 struct hostent *ent = NULL;
1249 if (!(flags & NI_NUMERICHOST))
1250 ent = gethostbyaddr((const char *)&sin->sin_addr,
1251 sizeof(sin->sin_addr), AF_INET);
1252
1253 if (ent)
1254 snprintf(host, hostlen, "%s", ent->h_name);
1255 else if (flags & NI_NAMEREQD)
1256 return EAI_NONAME;
1257 else
1258 snprintf(host, hostlen, "%s", inet_ntoa(sin->sin_addr));
1259 }
1260
1261 if (serv && servlen > 0) {
1262 struct servent *ent = NULL;
1263 if (!(flags & NI_NUMERICSERV))
1264 ent = getservbyport(sin->sin_port,
1265 flags & NI_DGRAM ? "udp" : "tcp");
1266
1267 if (ent)
1268 snprintf(serv, servlen, "%s", ent->s_name);
1269 else
1270 snprintf(serv, servlen, "%d", ntohs(sin->sin_port));
1271 }
1272
1273 return 0;
1274 }
1275
1276 static HMODULE ipv6_dll = NULL;
1277 static void (WSAAPI *ipv6_freeaddrinfo)(struct addrinfo *res);
1278 static int (WSAAPI *ipv6_getaddrinfo)(const char *node, const char *service,
1279 const struct addrinfo *hints,
1280 struct addrinfo **res);
1281 static int (WSAAPI *ipv6_getnameinfo)(const struct sockaddr *sa, socklen_t salen,
1282 char *host, DWORD hostlen,
1283 char *serv, DWORD servlen, int flags);
1284 /*
1285 * gai_strerror is an inline function in the ws2tcpip.h header, so we
1286 * don't need to try to load that one dynamically.
1287 */
1288
1289 static void socket_cleanup(void)
1290 {
1291 WSACleanup();
1292 if (ipv6_dll)
1293 FreeLibrary(ipv6_dll);
1294 ipv6_dll = NULL;
1295 ipv6_freeaddrinfo = freeaddrinfo_stub;
1296 ipv6_getaddrinfo = getaddrinfo_stub;
1297 ipv6_getnameinfo = getnameinfo_stub;
1298 }
1299
1300 static void ensure_socket_initialization(void)
1301 {
1302 WSADATA wsa;
1303 static int initialized = 0;
1304 const char *libraries[] = { "ws2_32.dll", "wship6.dll", NULL };
1305 const char **name;
1306
1307 if (initialized)
1308 return;
1309
1310 if (WSAStartup(MAKEWORD(2,2), &wsa))
1311 die("unable to initialize winsock subsystem, error %d",
1312 WSAGetLastError());
1313
1314 for (name = libraries; *name; name++) {
1315 ipv6_dll = LoadLibrary(*name);
1316 if (!ipv6_dll)
1317 continue;
1318
1319 ipv6_freeaddrinfo = (void (WSAAPI *)(struct addrinfo *))
1320 GetProcAddress(ipv6_dll, "freeaddrinfo");
1321 ipv6_getaddrinfo = (int (WSAAPI *)(const char *, const char *,
1322 const struct addrinfo *,
1323 struct addrinfo **))
1324 GetProcAddress(ipv6_dll, "getaddrinfo");
1325 ipv6_getnameinfo = (int (WSAAPI *)(const struct sockaddr *,
1326 socklen_t, char *, DWORD,
1327 char *, DWORD, int))
1328 GetProcAddress(ipv6_dll, "getnameinfo");
1329 if (!ipv6_freeaddrinfo || !ipv6_getaddrinfo || !ipv6_getnameinfo) {
1330 FreeLibrary(ipv6_dll);
1331 ipv6_dll = NULL;
1332 } else
1333 break;
1334 }
1335 if (!ipv6_freeaddrinfo || !ipv6_getaddrinfo || !ipv6_getnameinfo) {
1336 ipv6_freeaddrinfo = freeaddrinfo_stub;
1337 ipv6_getaddrinfo = getaddrinfo_stub;
1338 ipv6_getnameinfo = getnameinfo_stub;
1339 }
1340
1341 atexit(socket_cleanup);
1342 initialized = 1;
1343 }
1344
1345 #undef gethostbyname
1346 struct hostent *mingw_gethostbyname(const char *host)
1347 {
1348 ensure_socket_initialization();
1349 return gethostbyname(host);
1350 }
1351
1352 void mingw_freeaddrinfo(struct addrinfo *res)
1353 {
1354 ipv6_freeaddrinfo(res);
1355 }
1356
1357 int mingw_getaddrinfo(const char *node, const char *service,
1358 const struct addrinfo *hints, struct addrinfo **res)
1359 {
1360 ensure_socket_initialization();
1361 return ipv6_getaddrinfo(node, service, hints, res);
1362 }
1363
1364 int mingw_getnameinfo(const struct sockaddr *sa, socklen_t salen,
1365 char *host, DWORD hostlen, char *serv, DWORD servlen,
1366 int flags)
1367 {
1368 ensure_socket_initialization();
1369 return ipv6_getnameinfo(sa, salen, host, hostlen, serv, servlen, flags);
1370 }
1371
1372 int mingw_socket(int domain, int type, int protocol)
1373 {
1374 int sockfd;
1375 SOCKET s = WSASocket(domain, type, protocol, NULL, 0, 0);
1376 if (s == INVALID_SOCKET) {
1377 /*
1378 * WSAGetLastError() values are regular BSD error codes
1379 * biased by WSABASEERR.
1380 * However, strerror() does not know about networking
1381 * specific errors, which are values beginning at 38 or so.
1382 * Therefore, we choose to leave the biased error code
1383 * in errno so that _if_ someone looks up the code somewhere,
1384 * then it is at least the number that are usually listed.
1385 */
1386 errno = WSAGetLastError();
1387 return -1;
1388 }
1389 /* convert into a file descriptor */
1390 if ((sockfd = _open_osfhandle(s, O_RDWR|O_BINARY)) < 0) {
1391 closesocket(s);
1392 return error("unable to make a socket file descriptor: %s",
1393 strerror(errno));
1394 }
1395 return sockfd;
1396 }
1397
1398 #undef connect
1399 int mingw_connect(int sockfd, struct sockaddr *sa, size_t sz)
1400 {
1401 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
1402 return connect(s, sa, sz);
1403 }
1404
1405 #undef rename
1406 int mingw_rename(const char *pold, const char *pnew)
1407 {
1408 DWORD attrs, gle;
1409 int tries = 0;
1410
1411 /*
1412 * Try native rename() first to get errno right.
1413 * It is based on MoveFile(), which cannot overwrite existing files.
1414 */
1415 if (!rename(pold, pnew))
1416 return 0;
1417 if (errno != EEXIST)
1418 return -1;
1419 repeat:
1420 if (MoveFileEx(pold, pnew, MOVEFILE_REPLACE_EXISTING))
1421 return 0;
1422 /* TODO: translate more errors */
1423 gle = GetLastError();
1424 if (gle == ERROR_ACCESS_DENIED &&
1425 (attrs = GetFileAttributes(pnew)) != INVALID_FILE_ATTRIBUTES) {
1426 if (attrs & FILE_ATTRIBUTE_DIRECTORY) {
1427 errno = EISDIR;
1428 return -1;
1429 }
1430 if ((attrs & FILE_ATTRIBUTE_READONLY) &&
1431 SetFileAttributes(pnew, attrs & ~FILE_ATTRIBUTE_READONLY)) {
1432 if (MoveFileEx(pold, pnew, MOVEFILE_REPLACE_EXISTING))
1433 return 0;
1434 gle = GetLastError();
1435 /* revert file attributes on failure */
1436 SetFileAttributes(pnew, attrs);
1437 }
1438 }
1439 if (tries < ARRAY_SIZE(delay) && gle == ERROR_ACCESS_DENIED) {
1440 /*
1441 * We assume that some other process had the source or
1442 * destination file open at the wrong moment and retry.
1443 * In order to give the other process a higher chance to
1444 * complete its operation, we give up our time slice now.
1445 * If we have to retry again, we do sleep a bit.
1446 */
1447 Sleep(delay[tries]);
1448 tries++;
1449 goto repeat;
1450 }
1451 if (gle == ERROR_ACCESS_DENIED &&
1452 ask_user_yes_no("Rename from '%s' to '%s' failed. "
1453 "Should I try again?", pold, pnew))
1454 goto repeat;
1455
1456 errno = EACCES;
1457 return -1;
1458 }
1459
1460 /*
1461 * Note that this doesn't return the actual pagesize, but
1462 * the allocation granularity. If future Windows specific git code
1463 * needs the real getpagesize function, we need to find another solution.
1464 */
1465 int mingw_getpagesize(void)
1466 {
1467 SYSTEM_INFO si;
1468 GetSystemInfo(&si);
1469 return si.dwAllocationGranularity;
1470 }
1471
1472 struct passwd *getpwuid(int uid)
1473 {
1474 static char user_name[100];
1475 static struct passwd p;
1476
1477 DWORD len = sizeof(user_name);
1478 if (!GetUserName(user_name, &len))
1479 return NULL;
1480 p.pw_name = user_name;
1481 p.pw_gecos = "unknown";
1482 p.pw_dir = NULL;
1483 return &p;
1484 }
1485
1486 static HANDLE timer_event;
1487 static HANDLE timer_thread;
1488 static int timer_interval;
1489 static int one_shot;
1490 static sig_handler_t timer_fn = SIG_DFL;
1491
1492 /* The timer works like this:
1493 * The thread, ticktack(), is a trivial routine that most of the time
1494 * only waits to receive the signal to terminate. The main thread tells
1495 * the thread to terminate by setting the timer_event to the signalled
1496 * state.
1497 * But ticktack() interrupts the wait state after the timer's interval
1498 * length to call the signal handler.
1499 */
1500
1501 static unsigned __stdcall ticktack(void *dummy)
1502 {
1503 while (WaitForSingleObject(timer_event, timer_interval) == WAIT_TIMEOUT) {
1504 if (timer_fn == SIG_DFL)
1505 die("Alarm");
1506 if (timer_fn != SIG_IGN)
1507 timer_fn(SIGALRM);
1508 if (one_shot)
1509 break;
1510 }
1511 return 0;
1512 }
1513
1514 static int start_timer_thread(void)
1515 {
1516 timer_event = CreateEvent(NULL, FALSE, FALSE, NULL);
1517 if (timer_event) {
1518 timer_thread = (HANDLE) _beginthreadex(NULL, 0, ticktack, NULL, 0, NULL);
1519 if (!timer_thread )
1520 return errno = ENOMEM,
1521 error("cannot start timer thread");
1522 } else
1523 return errno = ENOMEM,
1524 error("cannot allocate resources for timer");
1525 return 0;
1526 }
1527
1528 static void stop_timer_thread(void)
1529 {
1530 if (timer_event)
1531 SetEvent(timer_event); /* tell thread to terminate */
1532 if (timer_thread) {
1533 int rc = WaitForSingleObject(timer_thread, 1000);
1534 if (rc == WAIT_TIMEOUT)
1535 error("timer thread did not terminate timely");
1536 else if (rc != WAIT_OBJECT_0)
1537 error("waiting for timer thread failed: %lu",
1538 GetLastError());
1539 CloseHandle(timer_thread);
1540 }
1541 if (timer_event)
1542 CloseHandle(timer_event);
1543 timer_event = NULL;
1544 timer_thread = NULL;
1545 }
1546
1547 static inline int is_timeval_eq(const struct timeval *i1, const struct timeval *i2)
1548 {
1549 return i1->tv_sec == i2->tv_sec && i1->tv_usec == i2->tv_usec;
1550 }
1551
1552 int setitimer(int type, struct itimerval *in, struct itimerval *out)
1553 {
1554 static const struct timeval zero;
1555 static int atexit_done;
1556
1557 if (out != NULL)
1558 return errno = EINVAL,
1559 error("setitimer param 3 != NULL not implemented");
1560 if (!is_timeval_eq(&in->it_interval, &zero) &&
1561 !is_timeval_eq(&in->it_interval, &in->it_value))
1562 return errno = EINVAL,
1563 error("setitimer: it_interval must be zero or eq it_value");
1564
1565 if (timer_thread)
1566 stop_timer_thread();
1567
1568 if (is_timeval_eq(&in->it_value, &zero) &&
1569 is_timeval_eq(&in->it_interval, &zero))
1570 return 0;
1571
1572 timer_interval = in->it_value.tv_sec * 1000 + in->it_value.tv_usec / 1000;
1573 one_shot = is_timeval_eq(&in->it_interval, &zero);
1574 if (!atexit_done) {
1575 atexit(stop_timer_thread);
1576 atexit_done = 1;
1577 }
1578 return start_timer_thread();
1579 }
1580
1581 int sigaction(int sig, struct sigaction *in, struct sigaction *out)
1582 {
1583 if (sig != SIGALRM)
1584 return errno = EINVAL,
1585 error("sigaction only implemented for SIGALRM");
1586 if (out != NULL)
1587 return errno = EINVAL,
1588 error("sigaction: param 3 != NULL not implemented");
1589
1590 timer_fn = in->sa_handler;
1591 return 0;
1592 }
1593
1594 #undef signal
1595 sig_handler_t mingw_signal(int sig, sig_handler_t handler)
1596 {
1597 sig_handler_t old = timer_fn;
1598 if (sig != SIGALRM)
1599 return signal(sig, handler);
1600 timer_fn = handler;
1601 return old;
1602 }
1603
1604 static const char *make_backslash_path(const char *path)
1605 {
1606 static char buf[PATH_MAX + 1];
1607 char *c;
1608
1609 if (strlcpy(buf, path, PATH_MAX) >= PATH_MAX)
1610 die("Too long path: %.*s", 60, path);
1611
1612 for (c = buf; *c; c++) {
1613 if (*c == '/')
1614 *c = '\\';
1615 }
1616 return buf;
1617 }
1618
1619 void mingw_open_html(const char *unixpath)
1620 {
1621 const char *htmlpath = make_backslash_path(unixpath);
1622 typedef HINSTANCE (WINAPI *T)(HWND, const char *,
1623 const char *, const char *, const char *, INT);
1624 T ShellExecute;
1625 HMODULE shell32;
1626 int r;
1627
1628 shell32 = LoadLibrary("shell32.dll");
1629 if (!shell32)
1630 die("cannot load shell32.dll");
1631 ShellExecute = (T)GetProcAddress(shell32, "ShellExecuteA");
1632 if (!ShellExecute)
1633 die("cannot run browser");
1634
1635 printf("Launching default browser to display HTML ...\n");
1636 r = (int)ShellExecute(NULL, "open", htmlpath, NULL, "\\", SW_SHOWNORMAL);
1637 FreeLibrary(shell32);
1638 /* see the MSDN documentation referring to the result codes here */
1639 if (r <= 32) {
1640 die("failed to launch browser for %.*s", MAX_PATH, unixpath);
1641 }
1642 }
1643
1644 int link(const char *oldpath, const char *newpath)
1645 {
1646 typedef BOOL (WINAPI *T)(const char*, const char*, LPSECURITY_ATTRIBUTES);
1647 static T create_hard_link = NULL;
1648 if (!create_hard_link) {
1649 create_hard_link = (T) GetProcAddress(
1650 GetModuleHandle("kernel32.dll"), "CreateHardLinkA");
1651 if (!create_hard_link)
1652 create_hard_link = (T)-1;
1653 }
1654 if (create_hard_link == (T)-1) {
1655 errno = ENOSYS;
1656 return -1;
1657 }
1658 if (!create_hard_link(newpath, oldpath, NULL)) {
1659 errno = err_win_to_posix(GetLastError());
1660 return -1;
1661 }
1662 return 0;
1663 }
1664
1665 char *getpass(const char *prompt)
1666 {
1667 struct strbuf buf = STRBUF_INIT;
1668
1669 fputs(prompt, stderr);
1670 for (;;) {
1671 char c = _getch();
1672 if (c == '\r' || c == '\n')
1673 break;
1674 strbuf_addch(&buf, c);
1675 }
1676 fputs("\n", stderr);
1677 return strbuf_detach(&buf, NULL);
1678 }
1679
1680 #ifndef NO_MINGW_REPLACE_READDIR
1681 /* MinGW readdir implementation to avoid extra lstats for Git */
1682 struct mingw_DIR
1683 {
1684 struct _finddata_t dd_dta; /* disk transfer area for this dir */
1685 struct mingw_dirent dd_dir; /* Our own implementation, including d_type */
1686 long dd_handle; /* _findnext handle */
1687 int dd_stat; /* 0 = next entry to read is first entry, -1 = off the end, positive = 0 based index of next entry */
1688 char dd_name[1]; /* given path for dir with search pattern (struct is extended) */
1689 };
1690
1691 struct dirent *mingw_readdir(DIR *dir)
1692 {
1693 WIN32_FIND_DATAA buf;
1694 HANDLE handle;
1695 struct mingw_DIR *mdir = (struct mingw_DIR*)dir;
1696
1697 if (!dir->dd_handle) {
1698 errno = EBADF; /* No set_errno for mingw */
1699 return NULL;
1700 }
1701
1702 if (dir->dd_handle == (long)INVALID_HANDLE_VALUE && dir->dd_stat == 0)
1703 {
1704 DWORD lasterr;
1705 handle = FindFirstFileA(dir->dd_name, &buf);
1706 lasterr = GetLastError();
1707 dir->dd_handle = (long)handle;
1708 if (handle == INVALID_HANDLE_VALUE && (lasterr != ERROR_NO_MORE_FILES)) {
1709 errno = err_win_to_posix(lasterr);
1710 return NULL;
1711 }
1712 } else if (dir->dd_handle == (long)INVALID_HANDLE_VALUE) {
1713 return NULL;
1714 } else if (!FindNextFileA((HANDLE)dir->dd_handle, &buf)) {
1715 DWORD lasterr = GetLastError();
1716 FindClose((HANDLE)dir->dd_handle);
1717 dir->dd_handle = (long)INVALID_HANDLE_VALUE;
1718 /* POSIX says you shouldn't set errno when readdir can't
1719 find any more files; so, if another error we leave it set. */
1720 if (lasterr != ERROR_NO_MORE_FILES)
1721 errno = err_win_to_posix(lasterr);
1722 return NULL;
1723 }
1724
1725 /* We get here if `buf' contains valid data. */
1726 strcpy(dir->dd_dir.d_name, buf.cFileName);
1727 ++dir->dd_stat;
1728
1729 /* Set file type, based on WIN32_FIND_DATA */
1730 mdir->dd_dir.d_type = 0;
1731 if (buf.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)
1732 mdir->dd_dir.d_type |= DT_DIR;
1733 else
1734 mdir->dd_dir.d_type |= DT_REG;
1735
1736 return (struct dirent*)&dir->dd_dir;
1737 }
1738 #endif // !NO_MINGW_REPLACE_READDIR
1739
1740 const char *get_windows_home_directory()
1741 {
1742 static const char *home_directory = NULL;
1743 struct strbuf buf = STRBUF_INIT;
1744
1745 if (home_directory)
1746 return home_directory;
1747
1748 home_directory = getenv("HOME");
1749 if (home_directory && *home_directory)
1750 return home_directory;
1751
1752 strbuf_addf(&buf, "%s/%s", getenv("HOMEDRIVE"), getenv("HOMEPATH"));
1753 home_directory = strbuf_detach(&buf, NULL);
1754
1755 return home_directory;
1756 }
1757
1758 int mingw_offset_1st_component(const char *path)
1759 {
1760 int offset = 0;
1761 if (has_dos_drive_prefix(path))
1762 offset = 2;
1763
1764 /* unc paths */
1765 else if (is_dir_sep(path[0]) && is_dir_sep(path[1])) {
1766
1767 /* skip server name */
1768 char *pos = strpbrk(path + 2, "\\/");
1769 if (!pos)
1770 return 0; /* Error: malformed unc path */
1771
1772 do {
1773 pos++;
1774 } while (*pos && !is_dir_sep(*pos));
1775
1776 offset = pos - path;
1777 }
1778
1779 return offset + is_dir_sep(path[offset]);
1780 }
The MinGW fork, forked for msysGit