Sync with 1.8.0.3
[git/git.git] / compat / mingw.c
1 #include "../git-compat-util.h"
2 #include "win32.h"
3 #include <conio.h>
4 #include "../strbuf.h"
5 #include "../run-command.h"
6
7 static const int delay[] = { 0, 1, 10, 20, 40 };
8
9 int err_win_to_posix(DWORD winerr)
10 {
11 int error = ENOSYS;
12 switch(winerr) {
13 case ERROR_ACCESS_DENIED: error = EACCES; break;
14 case ERROR_ACCOUNT_DISABLED: error = EACCES; break;
15 case ERROR_ACCOUNT_RESTRICTION: error = EACCES; break;
16 case ERROR_ALREADY_ASSIGNED: error = EBUSY; break;
17 case ERROR_ALREADY_EXISTS: error = EEXIST; break;
18 case ERROR_ARITHMETIC_OVERFLOW: error = ERANGE; break;
19 case ERROR_BAD_COMMAND: error = EIO; break;
20 case ERROR_BAD_DEVICE: error = ENODEV; break;
21 case ERROR_BAD_DRIVER_LEVEL: error = ENXIO; break;
22 case ERROR_BAD_EXE_FORMAT: error = ENOEXEC; break;
23 case ERROR_BAD_FORMAT: error = ENOEXEC; break;
24 case ERROR_BAD_LENGTH: error = EINVAL; break;
25 case ERROR_BAD_PATHNAME: error = ENOENT; break;
26 case ERROR_BAD_PIPE: error = EPIPE; break;
27 case ERROR_BAD_UNIT: error = ENODEV; break;
28 case ERROR_BAD_USERNAME: error = EINVAL; break;
29 case ERROR_BROKEN_PIPE: error = EPIPE; break;
30 case ERROR_BUFFER_OVERFLOW: error = ENAMETOOLONG; break;
31 case ERROR_BUSY: error = EBUSY; break;
32 case ERROR_BUSY_DRIVE: error = EBUSY; break;
33 case ERROR_CALL_NOT_IMPLEMENTED: error = ENOSYS; break;
34 case ERROR_CANNOT_MAKE: error = EACCES; break;
35 case ERROR_CANTOPEN: error = EIO; break;
36 case ERROR_CANTREAD: error = EIO; break;
37 case ERROR_CANTWRITE: error = EIO; break;
38 case ERROR_CRC: error = EIO; break;
39 case ERROR_CURRENT_DIRECTORY: error = EACCES; break;
40 case ERROR_DEVICE_IN_USE: error = EBUSY; break;
41 case ERROR_DEV_NOT_EXIST: error = ENODEV; break;
42 case ERROR_DIRECTORY: error = EINVAL; break;
43 case ERROR_DIR_NOT_EMPTY: error = ENOTEMPTY; break;
44 case ERROR_DISK_CHANGE: error = EIO; break;
45 case ERROR_DISK_FULL: error = ENOSPC; break;
46 case ERROR_DRIVE_LOCKED: error = EBUSY; break;
47 case ERROR_ENVVAR_NOT_FOUND: error = EINVAL; break;
48 case ERROR_EXE_MARKED_INVALID: error = ENOEXEC; break;
49 case ERROR_FILENAME_EXCED_RANGE: error = ENAMETOOLONG; break;
50 case ERROR_FILE_EXISTS: error = EEXIST; break;
51 case ERROR_FILE_INVALID: error = ENODEV; break;
52 case ERROR_FILE_NOT_FOUND: error = ENOENT; break;
53 case ERROR_GEN_FAILURE: error = EIO; break;
54 case ERROR_HANDLE_DISK_FULL: error = ENOSPC; break;
55 case ERROR_INSUFFICIENT_BUFFER: error = ENOMEM; break;
56 case ERROR_INVALID_ACCESS: error = EACCES; break;
57 case ERROR_INVALID_ADDRESS: error = EFAULT; break;
58 case ERROR_INVALID_BLOCK: error = EFAULT; break;
59 case ERROR_INVALID_DATA: error = EINVAL; break;
60 case ERROR_INVALID_DRIVE: error = ENODEV; break;
61 case ERROR_INVALID_EXE_SIGNATURE: error = ENOEXEC; break;
62 case ERROR_INVALID_FLAGS: error = EINVAL; break;
63 case ERROR_INVALID_FUNCTION: error = ENOSYS; break;
64 case ERROR_INVALID_HANDLE: error = EBADF; break;
65 case ERROR_INVALID_LOGON_HOURS: error = EACCES; break;
66 case ERROR_INVALID_NAME: error = EINVAL; break;
67 case ERROR_INVALID_OWNER: error = EINVAL; break;
68 case ERROR_INVALID_PARAMETER: error = EINVAL; break;
69 case ERROR_INVALID_PASSWORD: error = EPERM; break;
70 case ERROR_INVALID_PRIMARY_GROUP: error = EINVAL; break;
71 case ERROR_INVALID_SIGNAL_NUMBER: error = EINVAL; break;
72 case ERROR_INVALID_TARGET_HANDLE: error = EIO; break;
73 case ERROR_INVALID_WORKSTATION: error = EACCES; break;
74 case ERROR_IO_DEVICE: error = EIO; break;
75 case ERROR_IO_INCOMPLETE: error = EINTR; break;
76 case ERROR_LOCKED: error = EBUSY; break;
77 case ERROR_LOCK_VIOLATION: error = EACCES; break;
78 case ERROR_LOGON_FAILURE: error = EACCES; break;
79 case ERROR_MAPPED_ALIGNMENT: error = EINVAL; break;
80 case ERROR_META_EXPANSION_TOO_LONG: error = E2BIG; break;
81 case ERROR_MORE_DATA: error = EPIPE; break;
82 case ERROR_NEGATIVE_SEEK: error = ESPIPE; break;
83 case ERROR_NOACCESS: error = EFAULT; break;
84 case ERROR_NONE_MAPPED: error = EINVAL; break;
85 case ERROR_NOT_ENOUGH_MEMORY: error = ENOMEM; break;
86 case ERROR_NOT_READY: error = EAGAIN; break;
87 case ERROR_NOT_SAME_DEVICE: error = EXDEV; break;
88 case ERROR_NO_DATA: error = EPIPE; break;
89 case ERROR_NO_MORE_SEARCH_HANDLES: error = EIO; break;
90 case ERROR_NO_PROC_SLOTS: error = EAGAIN; break;
91 case ERROR_NO_SUCH_PRIVILEGE: error = EACCES; break;
92 case ERROR_OPEN_FAILED: error = EIO; break;
93 case ERROR_OPEN_FILES: error = EBUSY; break;
94 case ERROR_OPERATION_ABORTED: error = EINTR; break;
95 case ERROR_OUTOFMEMORY: error = ENOMEM; break;
96 case ERROR_PASSWORD_EXPIRED: error = EACCES; break;
97 case ERROR_PATH_BUSY: error = EBUSY; break;
98 case ERROR_PATH_NOT_FOUND: error = ENOENT; break;
99 case ERROR_PIPE_BUSY: error = EBUSY; break;
100 case ERROR_PIPE_CONNECTED: error = EPIPE; break;
101 case ERROR_PIPE_LISTENING: error = EPIPE; break;
102 case ERROR_PIPE_NOT_CONNECTED: error = EPIPE; break;
103 case ERROR_PRIVILEGE_NOT_HELD: error = EACCES; break;
104 case ERROR_READ_FAULT: error = EIO; break;
105 case ERROR_SEEK: error = EIO; break;
106 case ERROR_SEEK_ON_DEVICE: error = ESPIPE; break;
107 case ERROR_SHARING_BUFFER_EXCEEDED: error = ENFILE; break;
108 case ERROR_SHARING_VIOLATION: error = EACCES; break;
109 case ERROR_STACK_OVERFLOW: error = ENOMEM; break;
110 case ERROR_SWAPERROR: error = ENOENT; break;
111 case ERROR_TOO_MANY_MODULES: error = EMFILE; break;
112 case ERROR_TOO_MANY_OPEN_FILES: error = EMFILE; break;
113 case ERROR_UNRECOGNIZED_MEDIA: error = ENXIO; break;
114 case ERROR_UNRECOGNIZED_VOLUME: error = ENODEV; break;
115 case ERROR_WAIT_NO_CHILDREN: error = ECHILD; break;
116 case ERROR_WRITE_FAULT: error = EIO; break;
117 case ERROR_WRITE_PROTECT: error = EROFS; break;
118 }
119 return error;
120 }
121
122 static inline int is_file_in_use_error(DWORD errcode)
123 {
124 switch (errcode) {
125 case ERROR_SHARING_VIOLATION:
126 case ERROR_ACCESS_DENIED:
127 return 1;
128 }
129
130 return 0;
131 }
132
133 static int read_yes_no_answer(void)
134 {
135 char answer[1024];
136
137 if (fgets(answer, sizeof(answer), stdin)) {
138 size_t answer_len = strlen(answer);
139 int got_full_line = 0, c;
140
141 /* remove the newline */
142 if (answer_len >= 2 && answer[answer_len-2] == '\r') {
143 answer[answer_len-2] = '\0';
144 got_full_line = 1;
145 } else if (answer_len >= 1 && answer[answer_len-1] == '\n') {
146 answer[answer_len-1] = '\0';
147 got_full_line = 1;
148 }
149 /* flush the buffer in case we did not get the full line */
150 if (!got_full_line)
151 while ((c = getchar()) != EOF && c != '\n')
152 ;
153 } else
154 /* we could not read, return the
155 * default answer which is no */
156 return 0;
157
158 if (tolower(answer[0]) == 'y' && !answer[1])
159 return 1;
160 if (!strncasecmp(answer, "yes", sizeof(answer)))
161 return 1;
162 if (tolower(answer[0]) == 'n' && !answer[1])
163 return 0;
164 if (!strncasecmp(answer, "no", sizeof(answer)))
165 return 0;
166
167 /* did not find an answer we understand */
168 return -1;
169 }
170
171 static int ask_yes_no_if_possible(const char *format, ...)
172 {
173 char question[4096];
174 const char *retry_hook[] = { NULL, NULL, NULL };
175 va_list args;
176
177 va_start(args, format);
178 vsnprintf(question, sizeof(question), format, args);
179 va_end(args);
180
181 if ((retry_hook[0] = mingw_getenv("GIT_ASK_YESNO"))) {
182 retry_hook[1] = question;
183 return !run_command_v_opt(retry_hook, 0);
184 }
185
186 if (!isatty(_fileno(stdin)) || !isatty(_fileno(stderr)))
187 return 0;
188
189 while (1) {
190 int answer;
191 fprintf(stderr, "%s (y/n) ", question);
192
193 if ((answer = read_yes_no_answer()) >= 0)
194 return answer;
195
196 fprintf(stderr, "Sorry, I did not understand your answer. "
197 "Please type 'y' or 'n'\n");
198 }
199 }
200
201 #undef unlink
202 int mingw_unlink(const char *pathname)
203 {
204 int ret, tries = 0;
205
206 /* read-only files cannot be removed */
207 chmod(pathname, 0666);
208 while ((ret = unlink(pathname)) == -1 && tries < ARRAY_SIZE(delay)) {
209 if (!is_file_in_use_error(GetLastError()))
210 break;
211 /*
212 * We assume that some other process had the source or
213 * destination file open at the wrong moment and retry.
214 * In order to give the other process a higher chance to
215 * complete its operation, we give up our time slice now.
216 * If we have to retry again, we do sleep a bit.
217 */
218 Sleep(delay[tries]);
219 tries++;
220 }
221 while (ret == -1 && is_file_in_use_error(GetLastError()) &&
222 ask_yes_no_if_possible("Unlink of file '%s' failed. "
223 "Should I try again?", pathname))
224 ret = unlink(pathname);
225 return ret;
226 }
227
228 static int is_dir_empty(const char *path)
229 {
230 struct strbuf buf = STRBUF_INIT;
231 WIN32_FIND_DATAA findbuf;
232 HANDLE handle;
233
234 strbuf_addf(&buf, "%s\\*", path);
235 handle = FindFirstFileA(buf.buf, &findbuf);
236 if (handle == INVALID_HANDLE_VALUE) {
237 strbuf_release(&buf);
238 return GetLastError() == ERROR_NO_MORE_FILES;
239 }
240
241 while (!strcmp(findbuf.cFileName, ".") ||
242 !strcmp(findbuf.cFileName, ".."))
243 if (!FindNextFile(handle, &findbuf)) {
244 strbuf_release(&buf);
245 return GetLastError() == ERROR_NO_MORE_FILES;
246 }
247 FindClose(handle);
248 strbuf_release(&buf);
249 return 0;
250 }
251
252 #undef rmdir
253 int mingw_rmdir(const char *pathname)
254 {
255 int ret, tries = 0;
256
257 while ((ret = rmdir(pathname)) == -1 && tries < ARRAY_SIZE(delay)) {
258 if (!is_file_in_use_error(GetLastError()))
259 errno = err_win_to_posix(GetLastError());
260 if (errno != EACCES)
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 && errno == EACCES && 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 #undef open
284 int mingw_open (const char *filename, int oflags, ...)
285 {
286 va_list args;
287 unsigned mode;
288 int fd;
289
290 va_start(args, oflags);
291 mode = va_arg(args, int);
292 va_end(args);
293
294 if (filename && !strcmp(filename, "/dev/null"))
295 filename = "nul";
296
297 fd = open(filename, oflags, mode);
298
299 if (fd < 0 && (oflags & O_CREAT) && errno == EACCES) {
300 DWORD attrs = GetFileAttributes(filename);
301 if (attrs != INVALID_FILE_ATTRIBUTES && (attrs & FILE_ATTRIBUTE_DIRECTORY))
302 errno = EISDIR;
303 }
304 return fd;
305 }
306
307 #undef write
308 ssize_t mingw_write(int fd, const void *buf, size_t count)
309 {
310 /*
311 * While write() calls to a file on a local disk are translated
312 * into WriteFile() calls with a maximum size of 64KB on Windows
313 * XP and 256KB on Vista, no such cap is placed on writes to
314 * files over the network on Windows XP. Unfortunately, there
315 * seems to be a limit of 32MB-28KB on X64 and 64MB-32KB on x86;
316 * bigger writes fail on Windows XP.
317 * So we cap to a nice 31MB here to avoid write failures over
318 * the net without changing the number of WriteFile() calls in
319 * the local case.
320 */
321 return write(fd, buf, min(count, 31 * 1024 * 1024));
322 }
323
324 static BOOL WINAPI ctrl_ignore(DWORD type)
325 {
326 return TRUE;
327 }
328
329 #undef fgetc
330 int mingw_fgetc(FILE *stream)
331 {
332 int ch;
333 if (!isatty(_fileno(stream)))
334 return fgetc(stream);
335
336 SetConsoleCtrlHandler(ctrl_ignore, TRUE);
337 while (1) {
338 ch = fgetc(stream);
339 if (ch != EOF || GetLastError() != ERROR_OPERATION_ABORTED)
340 break;
341
342 /* Ctrl+C was pressed, simulate SIGINT and retry */
343 mingw_raise(SIGINT);
344 }
345 SetConsoleCtrlHandler(ctrl_ignore, FALSE);
346 return ch;
347 }
348
349 #undef fopen
350 FILE *mingw_fopen (const char *filename, const char *otype)
351 {
352 if (filename && !strcmp(filename, "/dev/null"))
353 filename = "nul";
354 return fopen(filename, otype);
355 }
356
357 #undef freopen
358 FILE *mingw_freopen (const char *filename, const char *otype, FILE *stream)
359 {
360 if (filename && !strcmp(filename, "/dev/null"))
361 filename = "nul";
362 return freopen(filename, otype, stream);
363 }
364
365 #undef fflush
366 int mingw_fflush(FILE *stream)
367 {
368 int ret = fflush(stream);
369
370 /*
371 * write() is used behind the scenes of stdio output functions.
372 * Since git code does not check for errors after each stdio write
373 * operation, it can happen that write() is called by a later
374 * stdio function even if an earlier write() call failed. In the
375 * case of a pipe whose readable end was closed, only the first
376 * call to write() reports EPIPE on Windows. Subsequent write()
377 * calls report EINVAL. It is impossible to notice whether this
378 * fflush invocation triggered such a case, therefore, we have to
379 * catch all EINVAL errors whole-sale.
380 */
381 if (ret && errno == EINVAL)
382 errno = EPIPE;
383
384 return ret;
385 }
386
387 /*
388 * The unit of FILETIME is 100-nanoseconds since January 1, 1601, UTC.
389 * Returns the 100-nanoseconds ("hekto nanoseconds") since the epoch.
390 */
391 static inline long long filetime_to_hnsec(const FILETIME *ft)
392 {
393 long long winTime = ((long long)ft->dwHighDateTime << 32) + ft->dwLowDateTime;
394 /* Windows to Unix Epoch conversion */
395 return winTime - 116444736000000000LL;
396 }
397
398 static inline time_t filetime_to_time_t(const FILETIME *ft)
399 {
400 return (time_t)(filetime_to_hnsec(ft) / 10000000);
401 }
402
403 /* We keep the do_lstat code in a separate function to avoid recursion.
404 * When a path ends with a slash, the stat will fail with ENOENT. In
405 * this case, we strip the trailing slashes and stat again.
406 *
407 * If follow is true then act like stat() and report on the link
408 * target. Otherwise report on the link itself.
409 */
410 static int do_lstat(int follow, const char *file_name, struct stat *buf)
411 {
412 int err;
413 WIN32_FILE_ATTRIBUTE_DATA fdata;
414
415 if (!(err = get_file_attr(file_name, &fdata))) {
416 buf->st_ino = 0;
417 buf->st_gid = 0;
418 buf->st_uid = 0;
419 buf->st_nlink = 1;
420 buf->st_mode = file_attr_to_st_mode(fdata.dwFileAttributes);
421 buf->st_size = fdata.nFileSizeLow |
422 (((off_t)fdata.nFileSizeHigh)<<32);
423 buf->st_dev = buf->st_rdev = 0; /* not used by Git */
424 buf->st_atime = filetime_to_time_t(&(fdata.ftLastAccessTime));
425 buf->st_mtime = filetime_to_time_t(&(fdata.ftLastWriteTime));
426 buf->st_ctime = filetime_to_time_t(&(fdata.ftCreationTime));
427 if (fdata.dwFileAttributes & FILE_ATTRIBUTE_REPARSE_POINT) {
428 WIN32_FIND_DATAA findbuf;
429 HANDLE handle = FindFirstFileA(file_name, &findbuf);
430 if (handle != INVALID_HANDLE_VALUE) {
431 if ((findbuf.dwFileAttributes & FILE_ATTRIBUTE_REPARSE_POINT) &&
432 (findbuf.dwReserved0 == IO_REPARSE_TAG_SYMLINK)) {
433 if (follow) {
434 char buffer[MAXIMUM_REPARSE_DATA_BUFFER_SIZE];
435 buf->st_size = readlink(file_name, buffer, MAXIMUM_REPARSE_DATA_BUFFER_SIZE);
436 } else {
437 buf->st_mode = S_IFLNK;
438 }
439 buf->st_mode |= S_IREAD;
440 if (!(findbuf.dwFileAttributes & FILE_ATTRIBUTE_READONLY))
441 buf->st_mode |= S_IWRITE;
442 }
443 FindClose(handle);
444 }
445 }
446 return 0;
447 }
448 errno = err;
449 return -1;
450 }
451
452 /* We provide our own lstat/fstat functions, since the provided
453 * lstat/fstat functions are so slow. These stat functions are
454 * tailored for Git's usage (read: fast), and are not meant to be
455 * complete. Note that Git stat()s are redirected to mingw_lstat()
456 * too, since Windows doesn't really handle symlinks that well.
457 */
458 static int do_stat_internal(int follow, const char *file_name, struct stat *buf)
459 {
460 int namelen;
461 static char alt_name[PATH_MAX];
462
463 if (!do_lstat(follow, file_name, buf))
464 return 0;
465
466 /* if file_name ended in a '/', Windows returned ENOENT;
467 * try again without trailing slashes
468 */
469 if (errno != ENOENT)
470 return -1;
471
472 namelen = strlen(file_name);
473 if (namelen && file_name[namelen-1] != '/')
474 return -1;
475 while (namelen && file_name[namelen-1] == '/')
476 --namelen;
477 if (!namelen || namelen >= PATH_MAX)
478 return -1;
479
480 memcpy(alt_name, file_name, namelen);
481 alt_name[namelen] = 0;
482 return do_lstat(follow, alt_name, buf);
483 }
484
485 int mingw_lstat(const char *file_name, struct stat *buf)
486 {
487 return do_stat_internal(0, file_name, buf);
488 }
489 int mingw_stat(const char *file_name, struct stat *buf)
490 {
491 return do_stat_internal(1, file_name, buf);
492 }
493
494 #undef fstat
495 int mingw_fstat(int fd, struct stat *buf)
496 {
497 HANDLE fh = (HANDLE)_get_osfhandle(fd);
498 BY_HANDLE_FILE_INFORMATION fdata;
499
500 if (fh == INVALID_HANDLE_VALUE) {
501 errno = EBADF;
502 return -1;
503 }
504 /* direct non-file handles to MS's fstat() */
505 if (GetFileType(fh) != FILE_TYPE_DISK)
506 return _fstati64(fd, buf);
507
508 if (GetFileInformationByHandle(fh, &fdata)) {
509 buf->st_ino = 0;
510 buf->st_gid = 0;
511 buf->st_uid = 0;
512 buf->st_nlink = 1;
513 buf->st_mode = file_attr_to_st_mode(fdata.dwFileAttributes);
514 buf->st_size = fdata.nFileSizeLow |
515 (((off_t)fdata.nFileSizeHigh)<<32);
516 buf->st_dev = buf->st_rdev = 0; /* not used by Git */
517 buf->st_atime = filetime_to_time_t(&(fdata.ftLastAccessTime));
518 buf->st_mtime = filetime_to_time_t(&(fdata.ftLastWriteTime));
519 buf->st_ctime = filetime_to_time_t(&(fdata.ftCreationTime));
520 return 0;
521 }
522 errno = EBADF;
523 return -1;
524 }
525
526 static inline void time_t_to_filetime(time_t t, FILETIME *ft)
527 {
528 long long winTime = t * 10000000LL + 116444736000000000LL;
529 ft->dwLowDateTime = winTime;
530 ft->dwHighDateTime = winTime >> 32;
531 }
532
533 int mingw_utime (const char *file_name, const struct utimbuf *times)
534 {
535 FILETIME mft, aft;
536 int fh, rc;
537
538 /* must have write permission */
539 DWORD attrs = GetFileAttributes(file_name);
540 if (attrs != INVALID_FILE_ATTRIBUTES &&
541 (attrs & FILE_ATTRIBUTE_READONLY)) {
542 /* ignore errors here; open() will report them */
543 SetFileAttributes(file_name, attrs & ~FILE_ATTRIBUTE_READONLY);
544 }
545
546 if ((fh = open(file_name, O_RDWR | O_BINARY)) < 0) {
547 rc = -1;
548 goto revert_attrs;
549 }
550
551 if (times) {
552 time_t_to_filetime(times->modtime, &mft);
553 time_t_to_filetime(times->actime, &aft);
554 } else {
555 GetSystemTimeAsFileTime(&mft);
556 aft = mft;
557 }
558 if (!SetFileTime((HANDLE)_get_osfhandle(fh), NULL, &aft, &mft)) {
559 errno = EINVAL;
560 rc = -1;
561 } else
562 rc = 0;
563 close(fh);
564
565 revert_attrs:
566 if (attrs != INVALID_FILE_ATTRIBUTES &&
567 (attrs & FILE_ATTRIBUTE_READONLY)) {
568 /* ignore errors again */
569 SetFileAttributes(file_name, attrs);
570 }
571 return rc;
572 }
573
574 unsigned int sleep (unsigned int seconds)
575 {
576 Sleep(seconds*1000);
577 return 0;
578 }
579
580 int mkstemp(char *template)
581 {
582 char *filename = mktemp(template);
583 if (filename == NULL)
584 return -1;
585 return open(filename, O_RDWR | O_CREAT, 0600);
586 }
587
588 int gettimeofday(struct timeval *tv, void *tz)
589 {
590 FILETIME ft;
591 long long hnsec;
592
593 GetSystemTimeAsFileTime(&ft);
594 hnsec = filetime_to_hnsec(&ft);
595 tv->tv_sec = hnsec / 10000000;
596 tv->tv_usec = (hnsec % 10000000) / 10;
597 return 0;
598 }
599
600 int pipe(int filedes[2])
601 {
602 HANDLE h[2];
603
604 /* this creates non-inheritable handles */
605 if (!CreatePipe(&h[0], &h[1], NULL, 8192)) {
606 errno = err_win_to_posix(GetLastError());
607 return -1;
608 }
609 filedes[0] = _open_osfhandle((int)h[0], O_NOINHERIT);
610 if (filedes[0] < 0) {
611 CloseHandle(h[0]);
612 CloseHandle(h[1]);
613 return -1;
614 }
615 filedes[1] = _open_osfhandle((int)h[1], O_NOINHERIT);
616 if (filedes[0] < 0) {
617 close(filedes[0]);
618 CloseHandle(h[1]);
619 return -1;
620 }
621 return 0;
622 }
623
624 struct tm *gmtime_r(const time_t *timep, struct tm *result)
625 {
626 /* gmtime() in MSVCRT.DLL is thread-safe, but not reentrant */
627 memcpy(result, gmtime(timep), sizeof(struct tm));
628 return result;
629 }
630
631 struct tm *localtime_r(const time_t *timep, struct tm *result)
632 {
633 /* localtime() in MSVCRT.DLL is thread-safe, but not reentrant */
634 memcpy(result, localtime(timep), sizeof(struct tm));
635 return result;
636 }
637
638 #undef getcwd
639 char *mingw_getcwd(char *pointer, int len)
640 {
641 int i;
642 char *ret = getcwd(pointer, len);
643 if (!ret)
644 return ret;
645 for (i = 0; pointer[i]; i++)
646 if (pointer[i] == '\\')
647 pointer[i] = '/';
648 return ret;
649 }
650
651 /*
652 * See http://msdn2.microsoft.com/en-us/library/17w5ykft(vs.71).aspx
653 * (Parsing C++ Command-Line Arguments)
654 */
655 static const char *quote_arg(const char *arg)
656 {
657 /* count chars to quote */
658 int len = 0, n = 0;
659 int force_quotes = 0;
660 char *q, *d;
661 const char *p = arg;
662 if (!*p) force_quotes = 1;
663 while (*p) {
664 if (isspace(*p) || *p == '*' || *p == '?' || *p == '{' || *p == '\'')
665 force_quotes = 1;
666 else if (*p == '"')
667 n++;
668 else if (*p == '\\') {
669 int count = 0;
670 while (*p == '\\') {
671 count++;
672 p++;
673 len++;
674 }
675 if (*p == '"')
676 n += count*2 + 1;
677 continue;
678 }
679 len++;
680 p++;
681 }
682 if (!force_quotes && n == 0)
683 return arg;
684
685 /* insert \ where necessary */
686 d = q = xmalloc(len+n+3);
687 *d++ = '"';
688 while (*arg) {
689 if (*arg == '"')
690 *d++ = '\\';
691 else if (*arg == '\\') {
692 int count = 0;
693 while (*arg == '\\') {
694 count++;
695 *d++ = *arg++;
696 }
697 if (*arg == '"') {
698 while (count-- > 0)
699 *d++ = '\\';
700 *d++ = '\\';
701 }
702 }
703 *d++ = *arg++;
704 }
705 *d++ = '"';
706 *d++ = 0;
707 return q;
708 }
709
710 static const char *parse_interpreter(const char *cmd)
711 {
712 static char buf[100];
713 char *p, *opt;
714 int n, fd;
715
716 /* don't even try a .exe */
717 n = strlen(cmd);
718 if (n >= 4 && !strcasecmp(cmd+n-4, ".exe"))
719 return NULL;
720
721 fd = open(cmd, O_RDONLY);
722 if (fd < 0)
723 return NULL;
724 n = read(fd, buf, sizeof(buf)-1);
725 close(fd);
726 if (n < 4) /* at least '#!/x' and not error */
727 return NULL;
728
729 if (buf[0] != '#' || buf[1] != '!')
730 return NULL;
731 buf[n] = '\0';
732 p = buf + strcspn(buf, "\r\n");
733 if (!*p)
734 return NULL;
735
736 *p = '\0';
737 if (!(p = strrchr(buf+2, '/')) && !(p = strrchr(buf+2, '\\')))
738 return NULL;
739 /* strip options */
740 if ((opt = strchr(p+1, ' ')))
741 *opt = '\0';
742 return p+1;
743 }
744
745 /*
746 * Splits the PATH into parts.
747 */
748 static char **get_path_split(void)
749 {
750 char *p, **path, *envpath = mingw_getenv("PATH");
751 int i, n = 0;
752
753 if (!envpath || !*envpath)
754 return NULL;
755
756 envpath = xstrdup(envpath);
757 p = envpath;
758 while (p) {
759 char *dir = p;
760 p = strchr(p, ';');
761 if (p) *p++ = '\0';
762 if (*dir) { /* not earlier, catches series of ; */
763 ++n;
764 }
765 }
766 if (!n)
767 return NULL;
768
769 path = xmalloc((n+1)*sizeof(char *));
770 p = envpath;
771 i = 0;
772 do {
773 if (*p)
774 path[i++] = xstrdup(p);
775 p = p+strlen(p)+1;
776 } while (i < n);
777 path[i] = NULL;
778
779 free(envpath);
780
781 return path;
782 }
783
784 static void free_path_split(char **path)
785 {
786 char **p = path;
787
788 if (!path)
789 return;
790
791 while (*p)
792 free(*p++);
793 free(path);
794 }
795
796 /*
797 * exe_only means that we only want to detect .exe files, but not scripts
798 * (which do not have an extension)
799 */
800 static char *lookup_prog(const char *dir, const char *cmd, int isexe, int exe_only)
801 {
802 char path[MAX_PATH];
803 snprintf(path, sizeof(path), "%s/%s.exe", dir, cmd);
804
805 if (!isexe && access(path, F_OK) == 0)
806 return xstrdup(path);
807 path[strlen(path)-4] = '\0';
808 if ((!exe_only || isexe) && access(path, F_OK) == 0)
809 if (!(GetFileAttributes(path) & FILE_ATTRIBUTE_DIRECTORY))
810 return xstrdup(path);
811 return NULL;
812 }
813
814 /*
815 * Determines the absolute path of cmd using the split path in path.
816 * If cmd contains a slash or backslash, no lookup is performed.
817 */
818 static char *path_lookup(const char *cmd, char **path, int exe_only)
819 {
820 char *prog = NULL;
821 int len = strlen(cmd);
822 int isexe = len >= 4 && !strcasecmp(cmd+len-4, ".exe");
823
824 if (strchr(cmd, '/') || strchr(cmd, '\\'))
825 prog = xstrdup(cmd);
826
827 while (!prog && *path)
828 prog = lookup_prog(*path++, cmd, isexe, exe_only);
829
830 return prog;
831 }
832
833 static int env_compare(const void *a, const void *b)
834 {
835 char *const *ea = a;
836 char *const *eb = b;
837 return strcasecmp(*ea, *eb);
838 }
839
840 struct pinfo_t {
841 struct pinfo_t *next;
842 pid_t pid;
843 HANDLE proc;
844 } pinfo_t;
845 struct pinfo_t *pinfo = NULL;
846 CRITICAL_SECTION pinfo_cs;
847
848 static pid_t mingw_spawnve_fd(const char *cmd, const char **argv, char **env,
849 const char *dir,
850 int prepend_cmd, int fhin, int fhout, int fherr)
851 {
852 STARTUPINFO si;
853 PROCESS_INFORMATION pi;
854 struct strbuf envblk, args;
855 unsigned flags;
856 BOOL ret;
857
858 /* Determine whether or not we are associated to a console */
859 HANDLE cons = CreateFile("CONOUT$", GENERIC_WRITE,
860 FILE_SHARE_WRITE, NULL, OPEN_EXISTING,
861 FILE_ATTRIBUTE_NORMAL, NULL);
862 if (cons == INVALID_HANDLE_VALUE) {
863 /* There is no console associated with this process.
864 * Since the child is a console process, Windows
865 * would normally create a console window. But
866 * since we'll be redirecting std streams, we do
867 * not need the console.
868 * It is necessary to use DETACHED_PROCESS
869 * instead of CREATE_NO_WINDOW to make ssh
870 * recognize that it has no console.
871 */
872 flags = DETACHED_PROCESS;
873 } else {
874 /* There is already a console. If we specified
875 * DETACHED_PROCESS here, too, Windows would
876 * disassociate the child from the console.
877 * The same is true for CREATE_NO_WINDOW.
878 * Go figure!
879 */
880 flags = 0;
881 CloseHandle(cons);
882 }
883 memset(&si, 0, sizeof(si));
884 si.cb = sizeof(si);
885 si.dwFlags = STARTF_USESTDHANDLES;
886 si.hStdInput = (HANDLE) _get_osfhandle(fhin);
887 si.hStdOutput = (HANDLE) _get_osfhandle(fhout);
888 si.hStdError = (HANDLE) _get_osfhandle(fherr);
889
890 /* concatenate argv, quoting args as we go */
891 strbuf_init(&args, 0);
892 if (prepend_cmd) {
893 char *quoted = (char *)quote_arg(cmd);
894 strbuf_addstr(&args, quoted);
895 if (quoted != cmd)
896 free(quoted);
897 }
898 for (; *argv; argv++) {
899 char *quoted = (char *)quote_arg(*argv);
900 if (*args.buf)
901 strbuf_addch(&args, ' ');
902 strbuf_addstr(&args, quoted);
903 if (quoted != *argv)
904 free(quoted);
905 }
906
907 if (env) {
908 int count = 0;
909 char **e, **sorted_env;
910
911 for (e = env; *e; e++)
912 count++;
913
914 /* environment must be sorted */
915 sorted_env = xmalloc(sizeof(*sorted_env) * (count + 1));
916 memcpy(sorted_env, env, sizeof(*sorted_env) * (count + 1));
917 qsort(sorted_env, count, sizeof(*sorted_env), env_compare);
918
919 strbuf_init(&envblk, 0);
920 for (e = sorted_env; *e; e++) {
921 strbuf_addstr(&envblk, *e);
922 strbuf_addch(&envblk, '\0');
923 }
924 free(sorted_env);
925 }
926
927 memset(&pi, 0, sizeof(pi));
928 ret = CreateProcess(cmd, args.buf, NULL, NULL, TRUE, flags,
929 env ? envblk.buf : NULL, dir, &si, &pi);
930
931 if (env)
932 strbuf_release(&envblk);
933 strbuf_release(&args);
934
935 if (!ret) {
936 errno = ENOENT;
937 return -1;
938 }
939 CloseHandle(pi.hThread);
940
941 /*
942 * The process ID is the human-readable identifier of the process
943 * that we want to present in log and error messages. The handle
944 * is not useful for this purpose. But we cannot close it, either,
945 * because it is not possible to turn a process ID into a process
946 * handle after the process terminated.
947 * Keep the handle in a list for waitpid.
948 */
949 EnterCriticalSection(&pinfo_cs);
950 {
951 struct pinfo_t *info = xmalloc(sizeof(struct pinfo_t));
952 info->pid = pi.dwProcessId;
953 info->proc = pi.hProcess;
954 info->next = pinfo;
955 pinfo = info;
956 }
957 LeaveCriticalSection(&pinfo_cs);
958
959 return (pid_t)pi.dwProcessId;
960 }
961
962 static pid_t mingw_spawnve(const char *cmd, const char **argv, char **env,
963 int prepend_cmd)
964 {
965 return mingw_spawnve_fd(cmd, argv, env, NULL, prepend_cmd, 0, 1, 2);
966 }
967
968 pid_t mingw_spawnvpe(const char *cmd, const char **argv, char **env,
969 const char *dir,
970 int fhin, int fhout, int fherr)
971 {
972 pid_t pid;
973 char **path = get_path_split();
974 char *prog = path_lookup(cmd, path, 0);
975
976 if (!prog) {
977 errno = ENOENT;
978 pid = -1;
979 }
980 else {
981 const char *interpr = parse_interpreter(prog);
982
983 if (interpr) {
984 const char *argv0 = argv[0];
985 char *iprog = path_lookup(interpr, path, 1);
986 argv[0] = prog;
987 if (!iprog) {
988 errno = ENOENT;
989 pid = -1;
990 }
991 else {
992 pid = mingw_spawnve_fd(iprog, argv, env, dir, 1,
993 fhin, fhout, fherr);
994 free(iprog);
995 }
996 argv[0] = argv0;
997 }
998 else
999 pid = mingw_spawnve_fd(prog, argv, env, dir, 0,
1000 fhin, fhout, fherr);
1001 free(prog);
1002 }
1003 free_path_split(path);
1004 return pid;
1005 }
1006
1007 static int try_shell_exec(const char *cmd, char *const *argv, char **env)
1008 {
1009 const char *interpr = parse_interpreter(cmd);
1010 char **path;
1011 char *prog;
1012 int pid = 0;
1013
1014 if (!interpr)
1015 return 0;
1016 path = get_path_split();
1017 prog = path_lookup(interpr, path, 1);
1018 if (prog) {
1019 int argc = 0;
1020 const char **argv2;
1021 while (argv[argc]) argc++;
1022 argv2 = xmalloc(sizeof(*argv) * (argc+1));
1023 argv2[0] = (char *)cmd; /* full path to the script file */
1024 memcpy(&argv2[1], &argv[1], sizeof(*argv) * argc);
1025 pid = mingw_spawnve(prog, argv2, env, 1);
1026 if (pid >= 0) {
1027 int status;
1028 if (waitpid(pid, &status, 0) < 0)
1029 status = 255;
1030 exit(status);
1031 }
1032 pid = 1; /* indicate that we tried but failed */
1033 free(prog);
1034 free(argv2);
1035 }
1036 free_path_split(path);
1037 return pid;
1038 }
1039
1040 static void mingw_execve(const char *cmd, char *const *argv, char *const *env)
1041 {
1042 /* check if git_command is a shell script */
1043 if (!try_shell_exec(cmd, argv, (char **)env)) {
1044 int pid, status;
1045
1046 pid = mingw_spawnve(cmd, (const char **)argv, (char **)env, 0);
1047 if (pid < 0)
1048 return;
1049 if (waitpid(pid, &status, 0) < 0)
1050 status = 255;
1051 exit(status);
1052 }
1053 }
1054
1055 int mingw_execvp(const char *cmd, char *const *argv)
1056 {
1057 char **path = get_path_split();
1058 char *prog = path_lookup(cmd, path, 0);
1059
1060 if (prog) {
1061 mingw_execve(prog, argv, environ);
1062 free(prog);
1063 } else
1064 errno = ENOENT;
1065
1066 free_path_split(path);
1067 return -1;
1068 }
1069
1070 int mingw_execv(const char *cmd, char *const *argv)
1071 {
1072 mingw_execve(cmd, argv, environ);
1073 return -1;
1074 }
1075
1076 int mingw_kill(pid_t pid, int sig)
1077 {
1078 if (pid > 0 && sig == SIGTERM) {
1079 HANDLE h = OpenProcess(PROCESS_TERMINATE, FALSE, pid);
1080
1081 if (TerminateProcess(h, -1)) {
1082 CloseHandle(h);
1083 return 0;
1084 }
1085
1086 errno = err_win_to_posix(GetLastError());
1087 CloseHandle(h);
1088 return -1;
1089 }
1090
1091 errno = EINVAL;
1092 return -1;
1093 }
1094
1095 static char **copy_environ(void)
1096 {
1097 char **env;
1098 int i = 0;
1099 while (environ[i])
1100 i++;
1101 env = xmalloc((i+1)*sizeof(*env));
1102 for (i = 0; environ[i]; i++)
1103 env[i] = xstrdup(environ[i]);
1104 env[i] = NULL;
1105 return env;
1106 }
1107
1108 void free_environ(char **env)
1109 {
1110 int i;
1111 for (i = 0; env[i]; i++)
1112 free(env[i]);
1113 free(env);
1114 }
1115
1116 static int lookup_env(char **env, const char *name, size_t nmln)
1117 {
1118 int i;
1119
1120 for (i = 0; env[i]; i++) {
1121 if (0 == strncmp(env[i], name, nmln)
1122 && '=' == env[i][nmln])
1123 /* matches */
1124 return i;
1125 }
1126 return -1;
1127 }
1128
1129 /*
1130 * If name contains '=', then sets the variable, otherwise it unsets it
1131 */
1132 static char **env_setenv(char **env, const char *name)
1133 {
1134 char *eq = strchrnul(name, '=');
1135 int i = lookup_env(env, name, eq-name);
1136
1137 if (i < 0) {
1138 if (*eq) {
1139 for (i = 0; env[i]; i++)
1140 ;
1141 env = xrealloc(env, (i+2)*sizeof(*env));
1142 env[i] = xstrdup(name);
1143 env[i+1] = NULL;
1144 }
1145 }
1146 else {
1147 free(env[i]);
1148 if (*eq)
1149 env[i] = xstrdup(name);
1150 else
1151 for (; env[i]; i++)
1152 env[i] = env[i+1];
1153 }
1154 return env;
1155 }
1156
1157 /*
1158 * Copies global environ and adjusts variables as specified by vars.
1159 */
1160 char **make_augmented_environ(const char *const *vars)
1161 {
1162 char **env = copy_environ();
1163
1164 while (*vars)
1165 env = env_setenv(env, *vars++);
1166 return env;
1167 }
1168
1169 #undef getenv
1170
1171 /*
1172 * The system's getenv looks up the name in a case-insensitive manner.
1173 * This version tries a case-sensitive lookup and falls back to
1174 * case-insensitive if nothing was found. This is necessary because,
1175 * as a prominent example, CMD sets 'Path', but not 'PATH'.
1176 * Warning: not thread-safe.
1177 */
1178 static char *getenv_cs(const char *name)
1179 {
1180 size_t len = strlen(name);
1181 int i = lookup_env(environ, name, len);
1182 if (i >= 0)
1183 return environ[i] + len + 1; /* skip past name and '=' */
1184 return getenv(name);
1185 }
1186
1187 char *mingw_getenv(const char *name)
1188 {
1189 char *result = getenv_cs(name);
1190 if (!result && !strcmp(name, "TMPDIR")) {
1191 /* on Windows it is TMP and TEMP */
1192 result = getenv_cs("TMP");
1193 if (!result)
1194 result = getenv_cs("TEMP");
1195 }
1196 return result;
1197 }
1198
1199 /*
1200 * Note, this isn't a complete replacement for getaddrinfo. It assumes
1201 * that service contains a numerical port, or that it is null. It
1202 * does a simple search using gethostbyname, and returns one IPv4 host
1203 * if one was found.
1204 */
1205 static int WSAAPI getaddrinfo_stub(const char *node, const char *service,
1206 const struct addrinfo *hints,
1207 struct addrinfo **res)
1208 {
1209 struct hostent *h = NULL;
1210 struct addrinfo *ai;
1211 struct sockaddr_in *sin;
1212
1213 if (node) {
1214 h = gethostbyname(node);
1215 if (!h)
1216 return WSAGetLastError();
1217 }
1218
1219 ai = xmalloc(sizeof(struct addrinfo));
1220 *res = ai;
1221 ai->ai_flags = 0;
1222 ai->ai_family = AF_INET;
1223 ai->ai_socktype = hints ? hints->ai_socktype : 0;
1224 switch (ai->ai_socktype) {
1225 case SOCK_STREAM:
1226 ai->ai_protocol = IPPROTO_TCP;
1227 break;
1228 case SOCK_DGRAM:
1229 ai->ai_protocol = IPPROTO_UDP;
1230 break;
1231 default:
1232 ai->ai_protocol = 0;
1233 break;
1234 }
1235 ai->ai_addrlen = sizeof(struct sockaddr_in);
1236 if (hints && (hints->ai_flags & AI_CANONNAME))
1237 ai->ai_canonname = h ? xstrdup(h->h_name) : NULL;
1238 else
1239 ai->ai_canonname = NULL;
1240
1241 sin = xmalloc(ai->ai_addrlen);
1242 memset(sin, 0, ai->ai_addrlen);
1243 sin->sin_family = AF_INET;
1244 /* Note: getaddrinfo is supposed to allow service to be a string,
1245 * which should be looked up using getservbyname. This is
1246 * currently not implemented */
1247 if (service)
1248 sin->sin_port = htons(atoi(service));
1249 if (h)
1250 sin->sin_addr = *(struct in_addr *)h->h_addr;
1251 else if (hints && (hints->ai_flags & AI_PASSIVE))
1252 sin->sin_addr.s_addr = INADDR_ANY;
1253 else
1254 sin->sin_addr.s_addr = INADDR_LOOPBACK;
1255 ai->ai_addr = (struct sockaddr *)sin;
1256 ai->ai_next = 0;
1257 return 0;
1258 }
1259
1260 static void WSAAPI freeaddrinfo_stub(struct addrinfo *res)
1261 {
1262 free(res->ai_canonname);
1263 free(res->ai_addr);
1264 free(res);
1265 }
1266
1267 static int WSAAPI getnameinfo_stub(const struct sockaddr *sa, socklen_t salen,
1268 char *host, DWORD hostlen,
1269 char *serv, DWORD servlen, int flags)
1270 {
1271 const struct sockaddr_in *sin = (const struct sockaddr_in *)sa;
1272 if (sa->sa_family != AF_INET)
1273 return EAI_FAMILY;
1274 if (!host && !serv)
1275 return EAI_NONAME;
1276
1277 if (host && hostlen > 0) {
1278 struct hostent *ent = NULL;
1279 if (!(flags & NI_NUMERICHOST))
1280 ent = gethostbyaddr((const char *)&sin->sin_addr,
1281 sizeof(sin->sin_addr), AF_INET);
1282
1283 if (ent)
1284 snprintf(host, hostlen, "%s", ent->h_name);
1285 else if (flags & NI_NAMEREQD)
1286 return EAI_NONAME;
1287 else
1288 snprintf(host, hostlen, "%s", inet_ntoa(sin->sin_addr));
1289 }
1290
1291 if (serv && servlen > 0) {
1292 struct servent *ent = NULL;
1293 if (!(flags & NI_NUMERICSERV))
1294 ent = getservbyport(sin->sin_port,
1295 flags & NI_DGRAM ? "udp" : "tcp");
1296
1297 if (ent)
1298 snprintf(serv, servlen, "%s", ent->s_name);
1299 else
1300 snprintf(serv, servlen, "%d", ntohs(sin->sin_port));
1301 }
1302
1303 return 0;
1304 }
1305
1306 static HMODULE ipv6_dll = NULL;
1307 static void (WSAAPI *ipv6_freeaddrinfo)(struct addrinfo *res);
1308 static int (WSAAPI *ipv6_getaddrinfo)(const char *node, const char *service,
1309 const struct addrinfo *hints,
1310 struct addrinfo **res);
1311 static int (WSAAPI *ipv6_getnameinfo)(const struct sockaddr *sa, socklen_t salen,
1312 char *host, DWORD hostlen,
1313 char *serv, DWORD servlen, int flags);
1314 /*
1315 * gai_strerror is an inline function in the ws2tcpip.h header, so we
1316 * don't need to try to load that one dynamically.
1317 */
1318
1319 static void socket_cleanup(void)
1320 {
1321 WSACleanup();
1322 if (ipv6_dll)
1323 FreeLibrary(ipv6_dll);
1324 ipv6_dll = NULL;
1325 ipv6_freeaddrinfo = freeaddrinfo_stub;
1326 ipv6_getaddrinfo = getaddrinfo_stub;
1327 ipv6_getnameinfo = getnameinfo_stub;
1328 }
1329
1330 static void ensure_socket_initialization(void)
1331 {
1332 WSADATA wsa;
1333 static int initialized = 0;
1334 const char *libraries[] = { "ws2_32.dll", "wship6.dll", NULL };
1335 const char **name;
1336
1337 if (initialized)
1338 return;
1339
1340 if (WSAStartup(MAKEWORD(2,2), &wsa))
1341 die("unable to initialize winsock subsystem, error %d",
1342 WSAGetLastError());
1343
1344 for (name = libraries; *name; name++) {
1345 ipv6_dll = LoadLibrary(*name);
1346 if (!ipv6_dll)
1347 continue;
1348
1349 ipv6_freeaddrinfo = (void (WSAAPI *)(struct addrinfo *))
1350 GetProcAddress(ipv6_dll, "freeaddrinfo");
1351 ipv6_getaddrinfo = (int (WSAAPI *)(const char *, const char *,
1352 const struct addrinfo *,
1353 struct addrinfo **))
1354 GetProcAddress(ipv6_dll, "getaddrinfo");
1355 ipv6_getnameinfo = (int (WSAAPI *)(const struct sockaddr *,
1356 socklen_t, char *, DWORD,
1357 char *, DWORD, int))
1358 GetProcAddress(ipv6_dll, "getnameinfo");
1359 if (!ipv6_freeaddrinfo || !ipv6_getaddrinfo || !ipv6_getnameinfo) {
1360 FreeLibrary(ipv6_dll);
1361 ipv6_dll = NULL;
1362 } else
1363 break;
1364 }
1365 if (!ipv6_freeaddrinfo || !ipv6_getaddrinfo || !ipv6_getnameinfo) {
1366 ipv6_freeaddrinfo = freeaddrinfo_stub;
1367 ipv6_getaddrinfo = getaddrinfo_stub;
1368 ipv6_getnameinfo = getnameinfo_stub;
1369 }
1370
1371 atexit(socket_cleanup);
1372 initialized = 1;
1373 }
1374
1375 #undef gethostname
1376 int mingw_gethostname(char *name, int namelen)
1377 {
1378 ensure_socket_initialization();
1379 return gethostname(name, namelen);
1380 }
1381
1382 #undef gethostbyname
1383 struct hostent *mingw_gethostbyname(const char *host)
1384 {
1385 ensure_socket_initialization();
1386 return gethostbyname(host);
1387 }
1388
1389 void mingw_freeaddrinfo(struct addrinfo *res)
1390 {
1391 ipv6_freeaddrinfo(res);
1392 }
1393
1394 int mingw_getaddrinfo(const char *node, const char *service,
1395 const struct addrinfo *hints, struct addrinfo **res)
1396 {
1397 ensure_socket_initialization();
1398 return ipv6_getaddrinfo(node, service, hints, res);
1399 }
1400
1401 int mingw_getnameinfo(const struct sockaddr *sa, socklen_t salen,
1402 char *host, DWORD hostlen, char *serv, DWORD servlen,
1403 int flags)
1404 {
1405 ensure_socket_initialization();
1406 return ipv6_getnameinfo(sa, salen, host, hostlen, serv, servlen, flags);
1407 }
1408
1409 int mingw_socket(int domain, int type, int protocol)
1410 {
1411 int sockfd;
1412 SOCKET s;
1413
1414 ensure_socket_initialization();
1415 s = WSASocket(domain, type, protocol, NULL, 0, 0);
1416 if (s == INVALID_SOCKET) {
1417 /*
1418 * WSAGetLastError() values are regular BSD error codes
1419 * biased by WSABASEERR.
1420 * However, strerror() does not know about networking
1421 * specific errors, which are values beginning at 38 or so.
1422 * Therefore, we choose to leave the biased error code
1423 * in errno so that _if_ someone looks up the code somewhere,
1424 * then it is at least the number that are usually listed.
1425 */
1426 errno = WSAGetLastError();
1427 return -1;
1428 }
1429 /* convert into a file descriptor */
1430 if ((sockfd = _open_osfhandle(s, O_RDWR|O_BINARY)) < 0) {
1431 closesocket(s);
1432 return error("unable to make a socket file descriptor: %s",
1433 strerror(errno));
1434 }
1435 return sockfd;
1436 }
1437
1438 #undef connect
1439 int mingw_connect(int sockfd, struct sockaddr *sa, size_t sz)
1440 {
1441 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
1442 return connect(s, sa, sz);
1443 }
1444
1445 #undef bind
1446 int mingw_bind(int sockfd, struct sockaddr *sa, size_t sz)
1447 {
1448 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
1449 return bind(s, sa, sz);
1450 }
1451
1452 #undef setsockopt
1453 int mingw_setsockopt(int sockfd, int lvl, int optname, void *optval, int optlen)
1454 {
1455 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
1456 return setsockopt(s, lvl, optname, (const char*)optval, optlen);
1457 }
1458
1459 #undef shutdown
1460 int mingw_shutdown(int sockfd, int how)
1461 {
1462 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
1463 return shutdown(s, how);
1464 }
1465
1466 #undef listen
1467 int mingw_listen(int sockfd, int backlog)
1468 {
1469 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
1470 return listen(s, backlog);
1471 }
1472
1473 #undef accept
1474 int mingw_accept(int sockfd1, struct sockaddr *sa, socklen_t *sz)
1475 {
1476 int sockfd2;
1477
1478 SOCKET s1 = (SOCKET)_get_osfhandle(sockfd1);
1479 SOCKET s2 = accept(s1, sa, sz);
1480
1481 /* convert into a file descriptor */
1482 if ((sockfd2 = _open_osfhandle(s2, O_RDWR|O_BINARY)) < 0) {
1483 int err = errno;
1484 closesocket(s2);
1485 return error("unable to make a socket file descriptor: %s",
1486 strerror(err));
1487 }
1488 return sockfd2;
1489 }
1490
1491 #undef rename
1492 int mingw_rename(const char *pold, const char *pnew)
1493 {
1494 DWORD attrs, gle;
1495 int tries = 0;
1496
1497 /*
1498 * Try native rename() first to get errno right.
1499 * It is based on MoveFile(), which cannot overwrite existing files.
1500 */
1501 if (!rename(pold, pnew))
1502 return 0;
1503 if (errno != EEXIST)
1504 return -1;
1505 repeat:
1506 if (MoveFileEx(pold, pnew, MOVEFILE_REPLACE_EXISTING))
1507 return 0;
1508 /* TODO: translate more errors */
1509 gle = GetLastError();
1510 if (gle == ERROR_ACCESS_DENIED &&
1511 (attrs = GetFileAttributes(pnew)) != INVALID_FILE_ATTRIBUTES) {
1512 if (attrs & FILE_ATTRIBUTE_DIRECTORY) {
1513 errno = EISDIR;
1514 return -1;
1515 }
1516 if ((attrs & FILE_ATTRIBUTE_READONLY) &&
1517 SetFileAttributes(pnew, attrs & ~FILE_ATTRIBUTE_READONLY)) {
1518 if (MoveFileEx(pold, pnew, MOVEFILE_REPLACE_EXISTING))
1519 return 0;
1520 gle = GetLastError();
1521 /* revert file attributes on failure */
1522 SetFileAttributes(pnew, attrs);
1523 }
1524 }
1525 if (tries < ARRAY_SIZE(delay) && gle == ERROR_ACCESS_DENIED) {
1526 /*
1527 * We assume that some other process had the source or
1528 * destination file open at the wrong moment and retry.
1529 * In order to give the other process a higher chance to
1530 * complete its operation, we give up our time slice now.
1531 * If we have to retry again, we do sleep a bit.
1532 */
1533 Sleep(delay[tries]);
1534 tries++;
1535 goto repeat;
1536 }
1537 if (gle == ERROR_ACCESS_DENIED &&
1538 ask_yes_no_if_possible("Rename from '%s' to '%s' failed. "
1539 "Should I try again?", pold, pnew))
1540 goto repeat;
1541
1542 errno = EACCES;
1543 return -1;
1544 }
1545
1546 /*
1547 * Note that this doesn't return the actual pagesize, but
1548 * the allocation granularity. If future Windows specific git code
1549 * needs the real getpagesize function, we need to find another solution.
1550 */
1551 int mingw_getpagesize(void)
1552 {
1553 SYSTEM_INFO si;
1554 GetSystemInfo(&si);
1555 return si.dwAllocationGranularity;
1556 }
1557
1558 struct passwd *getpwuid(int uid)
1559 {
1560 static char user_name[100];
1561 static struct passwd p;
1562
1563 DWORD len = sizeof(user_name);
1564 if (!GetUserName(user_name, &len))
1565 return NULL;
1566 p.pw_name = user_name;
1567 p.pw_gecos = "unknown";
1568 p.pw_dir = NULL;
1569 return &p;
1570 }
1571
1572 static HANDLE timer_event;
1573 static HANDLE timer_thread;
1574 static int timer_interval;
1575 static int one_shot;
1576 static sig_handler_t timer_fn = SIG_DFL, sigint_fn = SIG_DFL;
1577
1578 /* The timer works like this:
1579 * The thread, ticktack(), is a trivial routine that most of the time
1580 * only waits to receive the signal to terminate. The main thread tells
1581 * the thread to terminate by setting the timer_event to the signalled
1582 * state.
1583 * But ticktack() interrupts the wait state after the timer's interval
1584 * length to call the signal handler.
1585 */
1586
1587 static unsigned __stdcall ticktack(void *dummy)
1588 {
1589 while (WaitForSingleObject(timer_event, timer_interval) == WAIT_TIMEOUT) {
1590 mingw_raise(SIGALRM);
1591 if (one_shot)
1592 break;
1593 }
1594 return 0;
1595 }
1596
1597 static int start_timer_thread(void)
1598 {
1599 timer_event = CreateEvent(NULL, FALSE, FALSE, NULL);
1600 if (timer_event) {
1601 timer_thread = (HANDLE) _beginthreadex(NULL, 0, ticktack, NULL, 0, NULL);
1602 if (!timer_thread )
1603 return errno = ENOMEM,
1604 error("cannot start timer thread");
1605 } else
1606 return errno = ENOMEM,
1607 error("cannot allocate resources for timer");
1608 return 0;
1609 }
1610
1611 static void stop_timer_thread(void)
1612 {
1613 if (timer_event)
1614 SetEvent(timer_event); /* tell thread to terminate */
1615 if (timer_thread) {
1616 int rc = WaitForSingleObject(timer_thread, 1000);
1617 if (rc == WAIT_TIMEOUT)
1618 error("timer thread did not terminate timely");
1619 else if (rc != WAIT_OBJECT_0)
1620 error("waiting for timer thread failed: %lu",
1621 GetLastError());
1622 CloseHandle(timer_thread);
1623 }
1624 if (timer_event)
1625 CloseHandle(timer_event);
1626 timer_event = NULL;
1627 timer_thread = NULL;
1628 }
1629
1630 static inline int is_timeval_eq(const struct timeval *i1, const struct timeval *i2)
1631 {
1632 return i1->tv_sec == i2->tv_sec && i1->tv_usec == i2->tv_usec;
1633 }
1634
1635 int setitimer(int type, struct itimerval *in, struct itimerval *out)
1636 {
1637 static const struct timeval zero;
1638 static int atexit_done;
1639
1640 if (out != NULL)
1641 return errno = EINVAL,
1642 error("setitimer param 3 != NULL not implemented");
1643 if (!is_timeval_eq(&in->it_interval, &zero) &&
1644 !is_timeval_eq(&in->it_interval, &in->it_value))
1645 return errno = EINVAL,
1646 error("setitimer: it_interval must be zero or eq it_value");
1647
1648 if (timer_thread)
1649 stop_timer_thread();
1650
1651 if (is_timeval_eq(&in->it_value, &zero) &&
1652 is_timeval_eq(&in->it_interval, &zero))
1653 return 0;
1654
1655 timer_interval = in->it_value.tv_sec * 1000 + in->it_value.tv_usec / 1000;
1656 one_shot = is_timeval_eq(&in->it_interval, &zero);
1657 if (!atexit_done) {
1658 atexit(stop_timer_thread);
1659 atexit_done = 1;
1660 }
1661 return start_timer_thread();
1662 }
1663
1664 int sigaction(int sig, struct sigaction *in, struct sigaction *out)
1665 {
1666 if (sig != SIGALRM)
1667 return errno = EINVAL,
1668 error("sigaction only implemented for SIGALRM");
1669 if (out != NULL)
1670 return errno = EINVAL,
1671 error("sigaction: param 3 != NULL not implemented");
1672
1673 timer_fn = in->sa_handler;
1674 return 0;
1675 }
1676
1677 #undef signal
1678 sig_handler_t mingw_signal(int sig, sig_handler_t handler)
1679 {
1680 sig_handler_t old = timer_fn;
1681
1682 switch (sig) {
1683 case SIGALRM:
1684 timer_fn = handler;
1685 break;
1686
1687 case SIGINT:
1688 sigint_fn = handler;
1689 break;
1690
1691 default:
1692 return signal(sig, handler);
1693 }
1694
1695 return old;
1696 }
1697
1698 #undef raise
1699 int mingw_raise(int sig)
1700 {
1701 switch (sig) {
1702 case SIGALRM:
1703 if (timer_fn == SIG_DFL) {
1704 if (isatty(STDERR_FILENO))
1705 fputs("Alarm clock\n", stderr);
1706 exit(128 + SIGALRM);
1707 } else if (timer_fn != SIG_IGN)
1708 timer_fn(SIGALRM);
1709 return 0;
1710
1711 case SIGINT:
1712 if (sigint_fn == SIG_DFL)
1713 exit(128 + SIGINT);
1714 else if (sigint_fn != SIG_IGN)
1715 sigint_fn(SIGINT);
1716 return 0;
1717
1718 default:
1719 return raise(sig);
1720 }
1721 }
1722
1723
1724 static const char *make_backslash_path(const char *path)
1725 {
1726 static char buf[PATH_MAX + 1];
1727 char *c;
1728
1729 if (strlcpy(buf, path, PATH_MAX) >= PATH_MAX)
1730 die("Too long path: %.*s", 60, path);
1731
1732 for (c = buf; *c; c++) {
1733 if (*c == '/')
1734 *c = '\\';
1735 }
1736 return buf;
1737 }
1738
1739 void mingw_open_html(const char *unixpath)
1740 {
1741 const char *htmlpath = make_backslash_path(unixpath);
1742 typedef HINSTANCE (WINAPI *T)(HWND, const char *,
1743 const char *, const char *, const char *, INT);
1744 T ShellExecute;
1745 HMODULE shell32;
1746 int r;
1747
1748 shell32 = LoadLibrary("shell32.dll");
1749 if (!shell32)
1750 die("cannot load shell32.dll");
1751 ShellExecute = (T)GetProcAddress(shell32, "ShellExecuteA");
1752 if (!ShellExecute)
1753 die("cannot run browser");
1754
1755 printf("Launching default browser to display HTML ...\n");
1756 r = (int)ShellExecute(NULL, "open", htmlpath, NULL, "\\", SW_SHOWNORMAL);
1757 FreeLibrary(shell32);
1758 /* see the MSDN documentation referring to the result codes here */
1759 if (r <= 32) {
1760 die("failed to launch browser for %.*s", MAX_PATH, unixpath);
1761 }
1762 }
1763
1764 int link(const char *oldpath, const char *newpath)
1765 {
1766 typedef BOOL (WINAPI *T)(const char*, const char*, LPSECURITY_ATTRIBUTES);
1767 static T create_hard_link = NULL;
1768 if (!create_hard_link) {
1769 create_hard_link = (T) GetProcAddress(
1770 GetModuleHandle("kernel32.dll"), "CreateHardLinkA");
1771 if (!create_hard_link)
1772 create_hard_link = (T)-1;
1773 }
1774 if (create_hard_link == (T)-1) {
1775 errno = ENOSYS;
1776 return -1;
1777 }
1778 if (!create_hard_link(newpath, oldpath, NULL)) {
1779 errno = err_win_to_posix(GetLastError());
1780 return -1;
1781 }
1782 return 0;
1783 }
1784
1785 pid_t waitpid(pid_t pid, int *status, int options)
1786 {
1787 HANDLE h = OpenProcess(SYNCHRONIZE | PROCESS_QUERY_INFORMATION,
1788 FALSE, pid);
1789 if (!h) {
1790 errno = ECHILD;
1791 return -1;
1792 }
1793
1794 if (pid > 0 && options & WNOHANG) {
1795 if (WAIT_OBJECT_0 != WaitForSingleObject(h, 0)) {
1796 CloseHandle(h);
1797 return 0;
1798 }
1799 options &= ~WNOHANG;
1800 }
1801
1802 if (options == 0) {
1803 struct pinfo_t **ppinfo;
1804 if (WaitForSingleObject(h, INFINITE) != WAIT_OBJECT_0) {
1805 CloseHandle(h);
1806 return 0;
1807 }
1808
1809 if (status)
1810 GetExitCodeProcess(h, (LPDWORD)status);
1811
1812 EnterCriticalSection(&pinfo_cs);
1813
1814 ppinfo = &pinfo;
1815 while (*ppinfo) {
1816 struct pinfo_t *info = *ppinfo;
1817 if (info->pid == pid) {
1818 CloseHandle(info->proc);
1819 *ppinfo = info->next;
1820 free(info);
1821 break;
1822 }
1823 ppinfo = &info->next;
1824 }
1825
1826 LeaveCriticalSection(&pinfo_cs);
1827
1828 CloseHandle(h);
1829 return pid;
1830 }
1831 CloseHandle(h);
1832
1833 errno = EINVAL;
1834 return -1;
1835 }