compat/fnmatch: update old-style definition to ANSI
[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 break;
260 if (!is_dir_empty(pathname)) {
261 errno = ENOTEMPTY;
262 break;
263 }
264 /*
265 * We assume that some other process had the source or
266 * destination file open at the wrong moment and retry.
267 * In order to give the other process a higher chance to
268 * complete its operation, we give up our time slice now.
269 * If we have to retry again, we do sleep a bit.
270 */
271 Sleep(delay[tries]);
272 tries++;
273 }
274 while (ret == -1 && is_file_in_use_error(GetLastError()) &&
275 ask_yes_no_if_possible("Deletion of directory '%s' failed. "
276 "Should I try again?", pathname))
277 ret = rmdir(pathname);
278 return ret;
279 }
280
281 #undef open
282 int mingw_open (const char *filename, int oflags, ...)
283 {
284 va_list args;
285 unsigned mode;
286 int fd;
287
288 va_start(args, oflags);
289 mode = va_arg(args, int);
290 va_end(args);
291
292 if (filename && !strcmp(filename, "/dev/null"))
293 filename = "nul";
294
295 fd = open(filename, oflags, mode);
296
297 if (fd < 0 && (oflags & O_CREAT) && errno == EACCES) {
298 DWORD attrs = GetFileAttributes(filename);
299 if (attrs != INVALID_FILE_ATTRIBUTES && (attrs & FILE_ATTRIBUTE_DIRECTORY))
300 errno = EISDIR;
301 }
302 return fd;
303 }
304
305 #undef write
306 ssize_t mingw_write(int fd, const void *buf, size_t count)
307 {
308 /*
309 * While write() calls to a file on a local disk are translated
310 * into WriteFile() calls with a maximum size of 64KB on Windows
311 * XP and 256KB on Vista, no such cap is placed on writes to
312 * files over the network on Windows XP. Unfortunately, there
313 * seems to be a limit of 32MB-28KB on X64 and 64MB-32KB on x86;
314 * bigger writes fail on Windows XP.
315 * So we cap to a nice 31MB here to avoid write failures over
316 * the net without changing the number of WriteFile() calls in
317 * the local case.
318 */
319 return write(fd, buf, min(count, 31 * 1024 * 1024));
320 }
321
322 #undef fopen
323 FILE *mingw_fopen (const char *filename, const char *otype)
324 {
325 if (filename && !strcmp(filename, "/dev/null"))
326 filename = "nul";
327 return fopen(filename, otype);
328 }
329
330 #undef freopen
331 FILE *mingw_freopen (const char *filename, const char *otype, FILE *stream)
332 {
333 if (filename && !strcmp(filename, "/dev/null"))
334 filename = "nul";
335 return freopen(filename, otype, stream);
336 }
337
338 /*
339 * The unit of FILETIME is 100-nanoseconds since January 1, 1601, UTC.
340 * Returns the 100-nanoseconds ("hekto nanoseconds") since the epoch.
341 */
342 static inline long long filetime_to_hnsec(const FILETIME *ft)
343 {
344 long long winTime = ((long long)ft->dwHighDateTime << 32) + ft->dwLowDateTime;
345 /* Windows to Unix Epoch conversion */
346 return winTime - 116444736000000000LL;
347 }
348
349 static inline time_t filetime_to_time_t(const FILETIME *ft)
350 {
351 return (time_t)(filetime_to_hnsec(ft) / 10000000);
352 }
353
354 /* We keep the do_lstat code in a separate function to avoid recursion.
355 * When a path ends with a slash, the stat will fail with ENOENT. In
356 * this case, we strip the trailing slashes and stat again.
357 *
358 * If follow is true then act like stat() and report on the link
359 * target. Otherwise report on the link itself.
360 */
361 static int do_lstat(int follow, const char *file_name, struct stat *buf)
362 {
363 int err;
364 WIN32_FILE_ATTRIBUTE_DATA fdata;
365
366 if (!(err = get_file_attr(file_name, &fdata))) {
367 buf->st_ino = 0;
368 buf->st_gid = 0;
369 buf->st_uid = 0;
370 buf->st_nlink = 1;
371 buf->st_mode = file_attr_to_st_mode(fdata.dwFileAttributes);
372 buf->st_size = fdata.nFileSizeLow |
373 (((off_t)fdata.nFileSizeHigh)<<32);
374 buf->st_dev = buf->st_rdev = 0; /* not used by Git */
375 buf->st_atime = filetime_to_time_t(&(fdata.ftLastAccessTime));
376 buf->st_mtime = filetime_to_time_t(&(fdata.ftLastWriteTime));
377 buf->st_ctime = filetime_to_time_t(&(fdata.ftCreationTime));
378 if (fdata.dwFileAttributes & FILE_ATTRIBUTE_REPARSE_POINT) {
379 WIN32_FIND_DATAA findbuf;
380 HANDLE handle = FindFirstFileA(file_name, &findbuf);
381 if (handle != INVALID_HANDLE_VALUE) {
382 if ((findbuf.dwFileAttributes & FILE_ATTRIBUTE_REPARSE_POINT) &&
383 (findbuf.dwReserved0 == IO_REPARSE_TAG_SYMLINK)) {
384 if (follow) {
385 char buffer[MAXIMUM_REPARSE_DATA_BUFFER_SIZE];
386 buf->st_size = readlink(file_name, buffer, MAXIMUM_REPARSE_DATA_BUFFER_SIZE);
387 } else {
388 buf->st_mode = S_IFLNK;
389 }
390 buf->st_mode |= S_IREAD;
391 if (!(findbuf.dwFileAttributes & FILE_ATTRIBUTE_READONLY))
392 buf->st_mode |= S_IWRITE;
393 }
394 FindClose(handle);
395 }
396 }
397 return 0;
398 }
399 errno = err;
400 return -1;
401 }
402
403 /* We provide our own lstat/fstat functions, since the provided
404 * lstat/fstat functions are so slow. These stat functions are
405 * tailored for Git's usage (read: fast), and are not meant to be
406 * complete. Note that Git stat()s are redirected to mingw_lstat()
407 * too, since Windows doesn't really handle symlinks that well.
408 */
409 static int do_stat_internal(int follow, const char *file_name, struct stat *buf)
410 {
411 int namelen;
412 static char alt_name[PATH_MAX];
413
414 if (!do_lstat(follow, file_name, buf))
415 return 0;
416
417 /* if file_name ended in a '/', Windows returned ENOENT;
418 * try again without trailing slashes
419 */
420 if (errno != ENOENT)
421 return -1;
422
423 namelen = strlen(file_name);
424 if (namelen && file_name[namelen-1] != '/')
425 return -1;
426 while (namelen && file_name[namelen-1] == '/')
427 --namelen;
428 if (!namelen || namelen >= PATH_MAX)
429 return -1;
430
431 memcpy(alt_name, file_name, namelen);
432 alt_name[namelen] = 0;
433 return do_lstat(follow, alt_name, buf);
434 }
435
436 int mingw_lstat(const char *file_name, struct stat *buf)
437 {
438 return do_stat_internal(0, file_name, buf);
439 }
440 int mingw_stat(const char *file_name, struct stat *buf)
441 {
442 return do_stat_internal(1, file_name, buf);
443 }
444
445 #undef fstat
446 int mingw_fstat(int fd, struct stat *buf)
447 {
448 HANDLE fh = (HANDLE)_get_osfhandle(fd);
449 BY_HANDLE_FILE_INFORMATION fdata;
450
451 if (fh == INVALID_HANDLE_VALUE) {
452 errno = EBADF;
453 return -1;
454 }
455 /* direct non-file handles to MS's fstat() */
456 if (GetFileType(fh) != FILE_TYPE_DISK)
457 return _fstati64(fd, buf);
458
459 if (GetFileInformationByHandle(fh, &fdata)) {
460 buf->st_ino = 0;
461 buf->st_gid = 0;
462 buf->st_uid = 0;
463 buf->st_nlink = 1;
464 buf->st_mode = file_attr_to_st_mode(fdata.dwFileAttributes);
465 buf->st_size = fdata.nFileSizeLow |
466 (((off_t)fdata.nFileSizeHigh)<<32);
467 buf->st_dev = buf->st_rdev = 0; /* not used by Git */
468 buf->st_atime = filetime_to_time_t(&(fdata.ftLastAccessTime));
469 buf->st_mtime = filetime_to_time_t(&(fdata.ftLastWriteTime));
470 buf->st_ctime = filetime_to_time_t(&(fdata.ftCreationTime));
471 return 0;
472 }
473 errno = EBADF;
474 return -1;
475 }
476
477 static inline void time_t_to_filetime(time_t t, FILETIME *ft)
478 {
479 long long winTime = t * 10000000LL + 116444736000000000LL;
480 ft->dwLowDateTime = winTime;
481 ft->dwHighDateTime = winTime >> 32;
482 }
483
484 int mingw_utime (const char *file_name, const struct utimbuf *times)
485 {
486 FILETIME mft, aft;
487 int fh, rc;
488
489 /* must have write permission */
490 DWORD attrs = GetFileAttributes(file_name);
491 if (attrs != INVALID_FILE_ATTRIBUTES &&
492 (attrs & FILE_ATTRIBUTE_READONLY)) {
493 /* ignore errors here; open() will report them */
494 SetFileAttributes(file_name, attrs & ~FILE_ATTRIBUTE_READONLY);
495 }
496
497 if ((fh = open(file_name, O_RDWR | O_BINARY)) < 0) {
498 rc = -1;
499 goto revert_attrs;
500 }
501
502 if (times) {
503 time_t_to_filetime(times->modtime, &mft);
504 time_t_to_filetime(times->actime, &aft);
505 } else {
506 GetSystemTimeAsFileTime(&mft);
507 aft = mft;
508 }
509 if (!SetFileTime((HANDLE)_get_osfhandle(fh), NULL, &aft, &mft)) {
510 errno = EINVAL;
511 rc = -1;
512 } else
513 rc = 0;
514 close(fh);
515
516 revert_attrs:
517 if (attrs != INVALID_FILE_ATTRIBUTES &&
518 (attrs & FILE_ATTRIBUTE_READONLY)) {
519 /* ignore errors again */
520 SetFileAttributes(file_name, attrs);
521 }
522 return rc;
523 }
524
525 unsigned int sleep (unsigned int seconds)
526 {
527 Sleep(seconds*1000);
528 return 0;
529 }
530
531 int mkstemp(char *template)
532 {
533 char *filename = mktemp(template);
534 if (filename == NULL)
535 return -1;
536 return open(filename, O_RDWR | O_CREAT, 0600);
537 }
538
539 int gettimeofday(struct timeval *tv, void *tz)
540 {
541 FILETIME ft;
542 long long hnsec;
543
544 GetSystemTimeAsFileTime(&ft);
545 hnsec = filetime_to_hnsec(&ft);
546 tv->tv_sec = hnsec / 10000000;
547 tv->tv_usec = (hnsec % 10000000) / 10;
548 return 0;
549 }
550
551 int pipe(int filedes[2])
552 {
553 HANDLE h[2];
554
555 /* this creates non-inheritable handles */
556 if (!CreatePipe(&h[0], &h[1], NULL, 8192)) {
557 errno = err_win_to_posix(GetLastError());
558 return -1;
559 }
560 filedes[0] = _open_osfhandle((int)h[0], O_NOINHERIT);
561 if (filedes[0] < 0) {
562 CloseHandle(h[0]);
563 CloseHandle(h[1]);
564 return -1;
565 }
566 filedes[1] = _open_osfhandle((int)h[1], O_NOINHERIT);
567 if (filedes[0] < 0) {
568 close(filedes[0]);
569 CloseHandle(h[1]);
570 return -1;
571 }
572 return 0;
573 }
574
575 struct tm *gmtime_r(const time_t *timep, struct tm *result)
576 {
577 /* gmtime() in MSVCRT.DLL is thread-safe, but not reentrant */
578 memcpy(result, gmtime(timep), sizeof(struct tm));
579 return result;
580 }
581
582 struct tm *localtime_r(const time_t *timep, struct tm *result)
583 {
584 /* localtime() in MSVCRT.DLL is thread-safe, but not reentrant */
585 memcpy(result, localtime(timep), sizeof(struct tm));
586 return result;
587 }
588
589 #undef getcwd
590 char *mingw_getcwd(char *pointer, int len)
591 {
592 int i;
593 char *ret = getcwd(pointer, len);
594 if (!ret)
595 return ret;
596 for (i = 0; pointer[i]; i++)
597 if (pointer[i] == '\\')
598 pointer[i] = '/';
599 return ret;
600 }
601
602 /*
603 * See http://msdn2.microsoft.com/en-us/library/17w5ykft(vs.71).aspx
604 * (Parsing C++ Command-Line Arguments)
605 */
606 static const char *quote_arg(const char *arg)
607 {
608 /* count chars to quote */
609 int len = 0, n = 0;
610 int force_quotes = 0;
611 char *q, *d;
612 const char *p = arg;
613 if (!*p) force_quotes = 1;
614 while (*p) {
615 if (isspace(*p) || *p == '*' || *p == '?' || *p == '{' || *p == '\'')
616 force_quotes = 1;
617 else if (*p == '"')
618 n++;
619 else if (*p == '\\') {
620 int count = 0;
621 while (*p == '\\') {
622 count++;
623 p++;
624 len++;
625 }
626 if (*p == '"')
627 n += count*2 + 1;
628 continue;
629 }
630 len++;
631 p++;
632 }
633 if (!force_quotes && n == 0)
634 return arg;
635
636 /* insert \ where necessary */
637 d = q = xmalloc(len+n+3);
638 *d++ = '"';
639 while (*arg) {
640 if (*arg == '"')
641 *d++ = '\\';
642 else if (*arg == '\\') {
643 int count = 0;
644 while (*arg == '\\') {
645 count++;
646 *d++ = *arg++;
647 }
648 if (*arg == '"') {
649 while (count-- > 0)
650 *d++ = '\\';
651 *d++ = '\\';
652 }
653 }
654 *d++ = *arg++;
655 }
656 *d++ = '"';
657 *d++ = 0;
658 return q;
659 }
660
661 static const char *parse_interpreter(const char *cmd)
662 {
663 static char buf[100];
664 char *p, *opt;
665 int n, fd;
666
667 /* don't even try a .exe */
668 n = strlen(cmd);
669 if (n >= 4 && !strcasecmp(cmd+n-4, ".exe"))
670 return NULL;
671
672 fd = open(cmd, O_RDONLY);
673 if (fd < 0)
674 return NULL;
675 n = read(fd, buf, sizeof(buf)-1);
676 close(fd);
677 if (n < 4) /* at least '#!/x' and not error */
678 return NULL;
679
680 if (buf[0] != '#' || buf[1] != '!')
681 return NULL;
682 buf[n] = '\0';
683 p = buf + strcspn(buf, "\r\n");
684 if (!*p)
685 return NULL;
686
687 *p = '\0';
688 if (!(p = strrchr(buf+2, '/')) && !(p = strrchr(buf+2, '\\')))
689 return NULL;
690 /* strip options */
691 if ((opt = strchr(p+1, ' ')))
692 *opt = '\0';
693 return p+1;
694 }
695
696 /*
697 * Splits the PATH into parts.
698 */
699 static char **get_path_split(void)
700 {
701 char *p, **path, *envpath = mingw_getenv("PATH");
702 int i, n = 0;
703
704 if (!envpath || !*envpath)
705 return NULL;
706
707 envpath = xstrdup(envpath);
708 p = envpath;
709 while (p) {
710 char *dir = p;
711 p = strchr(p, ';');
712 if (p) *p++ = '\0';
713 if (*dir) { /* not earlier, catches series of ; */
714 ++n;
715 }
716 }
717 if (!n)
718 return NULL;
719
720 path = xmalloc((n+1)*sizeof(char *));
721 p = envpath;
722 i = 0;
723 do {
724 if (*p)
725 path[i++] = xstrdup(p);
726 p = p+strlen(p)+1;
727 } while (i < n);
728 path[i] = NULL;
729
730 free(envpath);
731
732 return path;
733 }
734
735 static void free_path_split(char **path)
736 {
737 char **p = path;
738
739 if (!path)
740 return;
741
742 while (*p)
743 free(*p++);
744 free(path);
745 }
746
747 /*
748 * exe_only means that we only want to detect .exe files, but not scripts
749 * (which do not have an extension)
750 */
751 static char *lookup_prog(const char *dir, const char *cmd, int isexe, int exe_only)
752 {
753 char path[MAX_PATH];
754 snprintf(path, sizeof(path), "%s/%s.exe", dir, cmd);
755
756 if (!isexe && access(path, F_OK) == 0)
757 return xstrdup(path);
758 path[strlen(path)-4] = '\0';
759 if ((!exe_only || isexe) && access(path, F_OK) == 0)
760 if (!(GetFileAttributes(path) & FILE_ATTRIBUTE_DIRECTORY))
761 return xstrdup(path);
762 return NULL;
763 }
764
765 /*
766 * Determines the absolute path of cmd using the split path in path.
767 * If cmd contains a slash or backslash, no lookup is performed.
768 */
769 static char *path_lookup(const char *cmd, char **path, int exe_only)
770 {
771 char *prog = NULL;
772 int len = strlen(cmd);
773 int isexe = len >= 4 && !strcasecmp(cmd+len-4, ".exe");
774
775 if (strchr(cmd, '/') || strchr(cmd, '\\'))
776 prog = xstrdup(cmd);
777
778 while (!prog && *path)
779 prog = lookup_prog(*path++, cmd, isexe, exe_only);
780
781 return prog;
782 }
783
784 static int env_compare(const void *a, const void *b)
785 {
786 char *const *ea = a;
787 char *const *eb = b;
788 return strcasecmp(*ea, *eb);
789 }
790
791 struct pinfo_t {
792 struct pinfo_t *next;
793 pid_t pid;
794 HANDLE proc;
795 } pinfo_t;
796 struct pinfo_t *pinfo = NULL;
797 CRITICAL_SECTION pinfo_cs;
798
799 static pid_t mingw_spawnve_fd(const char *cmd, const char **argv, char **env,
800 const char *dir,
801 int prepend_cmd, int fhin, int fhout, int fherr)
802 {
803 STARTUPINFO si;
804 PROCESS_INFORMATION pi;
805 struct strbuf envblk, args;
806 unsigned flags;
807 BOOL ret;
808
809 /* Determine whether or not we are associated to a console */
810 HANDLE cons = CreateFile("CONOUT$", GENERIC_WRITE,
811 FILE_SHARE_WRITE, NULL, OPEN_EXISTING,
812 FILE_ATTRIBUTE_NORMAL, NULL);
813 if (cons == INVALID_HANDLE_VALUE) {
814 /* There is no console associated with this process.
815 * Since the child is a console process, Windows
816 * would normally create a console window. But
817 * since we'll be redirecting std streams, we do
818 * not need the console.
819 * It is necessary to use DETACHED_PROCESS
820 * instead of CREATE_NO_WINDOW to make ssh
821 * recognize that it has no console.
822 */
823 flags = DETACHED_PROCESS;
824 } else {
825 /* There is already a console. If we specified
826 * DETACHED_PROCESS here, too, Windows would
827 * disassociate the child from the console.
828 * The same is true for CREATE_NO_WINDOW.
829 * Go figure!
830 */
831 flags = 0;
832 CloseHandle(cons);
833 }
834 memset(&si, 0, sizeof(si));
835 si.cb = sizeof(si);
836 si.dwFlags = STARTF_USESTDHANDLES;
837 si.hStdInput = (HANDLE) _get_osfhandle(fhin);
838 si.hStdOutput = (HANDLE) _get_osfhandle(fhout);
839 si.hStdError = (HANDLE) _get_osfhandle(fherr);
840
841 /* concatenate argv, quoting args as we go */
842 strbuf_init(&args, 0);
843 if (prepend_cmd) {
844 char *quoted = (char *)quote_arg(cmd);
845 strbuf_addstr(&args, quoted);
846 if (quoted != cmd)
847 free(quoted);
848 }
849 for (; *argv; argv++) {
850 char *quoted = (char *)quote_arg(*argv);
851 if (*args.buf)
852 strbuf_addch(&args, ' ');
853 strbuf_addstr(&args, quoted);
854 if (quoted != *argv)
855 free(quoted);
856 }
857
858 if (env) {
859 int count = 0;
860 char **e, **sorted_env;
861
862 for (e = env; *e; e++)
863 count++;
864
865 /* environment must be sorted */
866 sorted_env = xmalloc(sizeof(*sorted_env) * (count + 1));
867 memcpy(sorted_env, env, sizeof(*sorted_env) * (count + 1));
868 qsort(sorted_env, count, sizeof(*sorted_env), env_compare);
869
870 strbuf_init(&envblk, 0);
871 for (e = sorted_env; *e; e++) {
872 strbuf_addstr(&envblk, *e);
873 strbuf_addch(&envblk, '\0');
874 }
875 free(sorted_env);
876 }
877
878 memset(&pi, 0, sizeof(pi));
879 ret = CreateProcess(cmd, args.buf, NULL, NULL, TRUE, flags,
880 env ? envblk.buf : NULL, dir, &si, &pi);
881
882 if (env)
883 strbuf_release(&envblk);
884 strbuf_release(&args);
885
886 if (!ret) {
887 errno = ENOENT;
888 return -1;
889 }
890 CloseHandle(pi.hThread);
891
892 /*
893 * The process ID is the human-readable identifier of the process
894 * that we want to present in log and error messages. The handle
895 * is not useful for this purpose. But we cannot close it, either,
896 * because it is not possible to turn a process ID into a process
897 * handle after the process terminated.
898 * Keep the handle in a list for waitpid.
899 */
900 EnterCriticalSection(&pinfo_cs);
901 {
902 struct pinfo_t *info = xmalloc(sizeof(struct pinfo_t));
903 info->pid = pi.dwProcessId;
904 info->proc = pi.hProcess;
905 info->next = pinfo;
906 pinfo = info;
907 }
908 LeaveCriticalSection(&pinfo_cs);
909
910 return (pid_t)pi.dwProcessId;
911 }
912
913 static pid_t mingw_spawnve(const char *cmd, const char **argv, char **env,
914 int prepend_cmd)
915 {
916 return mingw_spawnve_fd(cmd, argv, env, NULL, prepend_cmd, 0, 1, 2);
917 }
918
919 pid_t mingw_spawnvpe(const char *cmd, const char **argv, char **env,
920 const char *dir,
921 int fhin, int fhout, int fherr)
922 {
923 pid_t pid;
924 char **path = get_path_split();
925 char *prog = path_lookup(cmd, path, 0);
926
927 if (!prog) {
928 errno = ENOENT;
929 pid = -1;
930 }
931 else {
932 const char *interpr = parse_interpreter(prog);
933
934 if (interpr) {
935 const char *argv0 = argv[0];
936 char *iprog = path_lookup(interpr, path, 1);
937 argv[0] = prog;
938 if (!iprog) {
939 errno = ENOENT;
940 pid = -1;
941 }
942 else {
943 pid = mingw_spawnve_fd(iprog, argv, env, dir, 1,
944 fhin, fhout, fherr);
945 free(iprog);
946 }
947 argv[0] = argv0;
948 }
949 else
950 pid = mingw_spawnve_fd(prog, argv, env, dir, 0,
951 fhin, fhout, fherr);
952 free(prog);
953 }
954 free_path_split(path);
955 return pid;
956 }
957
958 static int try_shell_exec(const char *cmd, char *const *argv, char **env)
959 {
960 const char *interpr = parse_interpreter(cmd);
961 char **path;
962 char *prog;
963 int pid = 0;
964
965 if (!interpr)
966 return 0;
967 path = get_path_split();
968 prog = path_lookup(interpr, path, 1);
969 if (prog) {
970 int argc = 0;
971 const char **argv2;
972 while (argv[argc]) argc++;
973 argv2 = xmalloc(sizeof(*argv) * (argc+1));
974 argv2[0] = (char *)cmd; /* full path to the script file */
975 memcpy(&argv2[1], &argv[1], sizeof(*argv) * argc);
976 pid = mingw_spawnve(prog, argv2, env, 1);
977 if (pid >= 0) {
978 int status;
979 if (waitpid(pid, &status, 0) < 0)
980 status = 255;
981 exit(status);
982 }
983 pid = 1; /* indicate that we tried but failed */
984 free(prog);
985 free(argv2);
986 }
987 free_path_split(path);
988 return pid;
989 }
990
991 static void mingw_execve(const char *cmd, char *const *argv, char *const *env)
992 {
993 /* check if git_command is a shell script */
994 if (!try_shell_exec(cmd, argv, (char **)env)) {
995 int pid, status;
996
997 pid = mingw_spawnve(cmd, (const char **)argv, (char **)env, 0);
998 if (pid < 0)
999 return;
1000 if (waitpid(pid, &status, 0) < 0)
1001 status = 255;
1002 exit(status);
1003 }
1004 }
1005
1006 int mingw_execvp(const char *cmd, char *const *argv)
1007 {
1008 char **path = get_path_split();
1009 char *prog = path_lookup(cmd, path, 0);
1010
1011 if (prog) {
1012 mingw_execve(prog, argv, environ);
1013 free(prog);
1014 } else
1015 errno = ENOENT;
1016
1017 free_path_split(path);
1018 return -1;
1019 }
1020
1021 int mingw_execv(const char *cmd, char *const *argv)
1022 {
1023 mingw_execve(cmd, argv, environ);
1024 return -1;
1025 }
1026
1027 int mingw_kill(pid_t pid, int sig)
1028 {
1029 if (pid > 0 && sig == SIGTERM) {
1030 HANDLE h = OpenProcess(PROCESS_TERMINATE, FALSE, pid);
1031
1032 if (TerminateProcess(h, -1)) {
1033 CloseHandle(h);
1034 return 0;
1035 }
1036
1037 errno = err_win_to_posix(GetLastError());
1038 CloseHandle(h);
1039 return -1;
1040 }
1041
1042 errno = EINVAL;
1043 return -1;
1044 }
1045
1046 static char **copy_environ(void)
1047 {
1048 char **env;
1049 int i = 0;
1050 while (environ[i])
1051 i++;
1052 env = xmalloc((i+1)*sizeof(*env));
1053 for (i = 0; environ[i]; i++)
1054 env[i] = xstrdup(environ[i]);
1055 env[i] = NULL;
1056 return env;
1057 }
1058
1059 void free_environ(char **env)
1060 {
1061 int i;
1062 for (i = 0; env[i]; i++)
1063 free(env[i]);
1064 free(env);
1065 }
1066
1067 static int lookup_env(char **env, const char *name, size_t nmln)
1068 {
1069 int i;
1070
1071 for (i = 0; env[i]; i++) {
1072 if (0 == strncmp(env[i], name, nmln)
1073 && '=' == env[i][nmln])
1074 /* matches */
1075 return i;
1076 }
1077 return -1;
1078 }
1079
1080 /*
1081 * If name contains '=', then sets the variable, otherwise it unsets it
1082 */
1083 static char **env_setenv(char **env, const char *name)
1084 {
1085 char *eq = strchrnul(name, '=');
1086 int i = lookup_env(env, name, eq-name);
1087
1088 if (i < 0) {
1089 if (*eq) {
1090 for (i = 0; env[i]; i++)
1091 ;
1092 env = xrealloc(env, (i+2)*sizeof(*env));
1093 env[i] = xstrdup(name);
1094 env[i+1] = NULL;
1095 }
1096 }
1097 else {
1098 free(env[i]);
1099 if (*eq)
1100 env[i] = xstrdup(name);
1101 else
1102 for (; env[i]; i++)
1103 env[i] = env[i+1];
1104 }
1105 return env;
1106 }
1107
1108 /*
1109 * Copies global environ and adjusts variables as specified by vars.
1110 */
1111 char **make_augmented_environ(const char *const *vars)
1112 {
1113 char **env = copy_environ();
1114
1115 while (*vars)
1116 env = env_setenv(env, *vars++);
1117 return env;
1118 }
1119
1120 #undef getenv
1121
1122 /*
1123 * The system's getenv looks up the name in a case-insensitive manner.
1124 * This version tries a case-sensitive lookup and falls back to
1125 * case-insensitive if nothing was found. This is necessary because,
1126 * as a prominent example, CMD sets 'Path', but not 'PATH'.
1127 * Warning: not thread-safe.
1128 */
1129 static char *getenv_cs(const char *name)
1130 {
1131 size_t len = strlen(name);
1132 int i = lookup_env(environ, name, len);
1133 if (i >= 0)
1134 return environ[i] + len + 1; /* skip past name and '=' */
1135 return getenv(name);
1136 }
1137
1138 char *mingw_getenv(const char *name)
1139 {
1140 char *result = getenv_cs(name);
1141 if (!result && !strcmp(name, "TMPDIR")) {
1142 /* on Windows it is TMP and TEMP */
1143 result = getenv_cs("TMP");
1144 if (!result)
1145 result = getenv_cs("TEMP");
1146 }
1147 return result;
1148 }
1149
1150 /*
1151 * Note, this isn't a complete replacement for getaddrinfo. It assumes
1152 * that service contains a numerical port, or that it is null. It
1153 * does a simple search using gethostbyname, and returns one IPv4 host
1154 * if one was found.
1155 */
1156 static int WSAAPI getaddrinfo_stub(const char *node, const char *service,
1157 const struct addrinfo *hints,
1158 struct addrinfo **res)
1159 {
1160 struct hostent *h = NULL;
1161 struct addrinfo *ai;
1162 struct sockaddr_in *sin;
1163
1164 if (node) {
1165 h = gethostbyname(node);
1166 if (!h)
1167 return WSAGetLastError();
1168 }
1169
1170 ai = xmalloc(sizeof(struct addrinfo));
1171 *res = ai;
1172 ai->ai_flags = 0;
1173 ai->ai_family = AF_INET;
1174 ai->ai_socktype = hints ? hints->ai_socktype : 0;
1175 switch (ai->ai_socktype) {
1176 case SOCK_STREAM:
1177 ai->ai_protocol = IPPROTO_TCP;
1178 break;
1179 case SOCK_DGRAM:
1180 ai->ai_protocol = IPPROTO_UDP;
1181 break;
1182 default:
1183 ai->ai_protocol = 0;
1184 break;
1185 }
1186 ai->ai_addrlen = sizeof(struct sockaddr_in);
1187 if (hints && (hints->ai_flags & AI_CANONNAME))
1188 ai->ai_canonname = h ? xstrdup(h->h_name) : NULL;
1189 else
1190 ai->ai_canonname = NULL;
1191
1192 sin = xmalloc(ai->ai_addrlen);
1193 memset(sin, 0, ai->ai_addrlen);
1194 sin->sin_family = AF_INET;
1195 /* Note: getaddrinfo is supposed to allow service to be a string,
1196 * which should be looked up using getservbyname. This is
1197 * currently not implemented */
1198 if (service)
1199 sin->sin_port = htons(atoi(service));
1200 if (h)
1201 sin->sin_addr = *(struct in_addr *)h->h_addr;
1202 else if (hints && (hints->ai_flags & AI_PASSIVE))
1203 sin->sin_addr.s_addr = INADDR_ANY;
1204 else
1205 sin->sin_addr.s_addr = INADDR_LOOPBACK;
1206 ai->ai_addr = (struct sockaddr *)sin;
1207 ai->ai_next = 0;
1208 return 0;
1209 }
1210
1211 static void WSAAPI freeaddrinfo_stub(struct addrinfo *res)
1212 {
1213 free(res->ai_canonname);
1214 free(res->ai_addr);
1215 free(res);
1216 }
1217
1218 static int WSAAPI getnameinfo_stub(const struct sockaddr *sa, socklen_t salen,
1219 char *host, DWORD hostlen,
1220 char *serv, DWORD servlen, int flags)
1221 {
1222 const struct sockaddr_in *sin = (const struct sockaddr_in *)sa;
1223 if (sa->sa_family != AF_INET)
1224 return EAI_FAMILY;
1225 if (!host && !serv)
1226 return EAI_NONAME;
1227
1228 if (host && hostlen > 0) {
1229 struct hostent *ent = NULL;
1230 if (!(flags & NI_NUMERICHOST))
1231 ent = gethostbyaddr((const char *)&sin->sin_addr,
1232 sizeof(sin->sin_addr), AF_INET);
1233
1234 if (ent)
1235 snprintf(host, hostlen, "%s", ent->h_name);
1236 else if (flags & NI_NAMEREQD)
1237 return EAI_NONAME;
1238 else
1239 snprintf(host, hostlen, "%s", inet_ntoa(sin->sin_addr));
1240 }
1241
1242 if (serv && servlen > 0) {
1243 struct servent *ent = NULL;
1244 if (!(flags & NI_NUMERICSERV))
1245 ent = getservbyport(sin->sin_port,
1246 flags & NI_DGRAM ? "udp" : "tcp");
1247
1248 if (ent)
1249 snprintf(serv, servlen, "%s", ent->s_name);
1250 else
1251 snprintf(serv, servlen, "%d", ntohs(sin->sin_port));
1252 }
1253
1254 return 0;
1255 }
1256
1257 static HMODULE ipv6_dll = NULL;
1258 static void (WSAAPI *ipv6_freeaddrinfo)(struct addrinfo *res);
1259 static int (WSAAPI *ipv6_getaddrinfo)(const char *node, const char *service,
1260 const struct addrinfo *hints,
1261 struct addrinfo **res);
1262 static int (WSAAPI *ipv6_getnameinfo)(const struct sockaddr *sa, socklen_t salen,
1263 char *host, DWORD hostlen,
1264 char *serv, DWORD servlen, int flags);
1265 /*
1266 * gai_strerror is an inline function in the ws2tcpip.h header, so we
1267 * don't need to try to load that one dynamically.
1268 */
1269
1270 static void socket_cleanup(void)
1271 {
1272 WSACleanup();
1273 if (ipv6_dll)
1274 FreeLibrary(ipv6_dll);
1275 ipv6_dll = NULL;
1276 ipv6_freeaddrinfo = freeaddrinfo_stub;
1277 ipv6_getaddrinfo = getaddrinfo_stub;
1278 ipv6_getnameinfo = getnameinfo_stub;
1279 }
1280
1281 static void ensure_socket_initialization(void)
1282 {
1283 WSADATA wsa;
1284 static int initialized = 0;
1285 const char *libraries[] = { "ws2_32.dll", "wship6.dll", NULL };
1286 const char **name;
1287
1288 if (initialized)
1289 return;
1290
1291 if (WSAStartup(MAKEWORD(2,2), &wsa))
1292 die("unable to initialize winsock subsystem, error %d",
1293 WSAGetLastError());
1294
1295 for (name = libraries; *name; name++) {
1296 ipv6_dll = LoadLibrary(*name);
1297 if (!ipv6_dll)
1298 continue;
1299
1300 ipv6_freeaddrinfo = (void (WSAAPI *)(struct addrinfo *))
1301 GetProcAddress(ipv6_dll, "freeaddrinfo");
1302 ipv6_getaddrinfo = (int (WSAAPI *)(const char *, const char *,
1303 const struct addrinfo *,
1304 struct addrinfo **))
1305 GetProcAddress(ipv6_dll, "getaddrinfo");
1306 ipv6_getnameinfo = (int (WSAAPI *)(const struct sockaddr *,
1307 socklen_t, char *, DWORD,
1308 char *, DWORD, int))
1309 GetProcAddress(ipv6_dll, "getnameinfo");
1310 if (!ipv6_freeaddrinfo || !ipv6_getaddrinfo || !ipv6_getnameinfo) {
1311 FreeLibrary(ipv6_dll);
1312 ipv6_dll = NULL;
1313 } else
1314 break;
1315 }
1316 if (!ipv6_freeaddrinfo || !ipv6_getaddrinfo || !ipv6_getnameinfo) {
1317 ipv6_freeaddrinfo = freeaddrinfo_stub;
1318 ipv6_getaddrinfo = getaddrinfo_stub;
1319 ipv6_getnameinfo = getnameinfo_stub;
1320 }
1321
1322 atexit(socket_cleanup);
1323 initialized = 1;
1324 }
1325
1326 #undef gethostname
1327 int mingw_gethostname(char *name, int namelen)
1328 {
1329 ensure_socket_initialization();
1330 return gethostname(name, namelen);
1331 }
1332
1333 #undef gethostbyname
1334 struct hostent *mingw_gethostbyname(const char *host)
1335 {
1336 ensure_socket_initialization();
1337 return gethostbyname(host);
1338 }
1339
1340 void mingw_freeaddrinfo(struct addrinfo *res)
1341 {
1342 ipv6_freeaddrinfo(res);
1343 }
1344
1345 int mingw_getaddrinfo(const char *node, const char *service,
1346 const struct addrinfo *hints, struct addrinfo **res)
1347 {
1348 ensure_socket_initialization();
1349 return ipv6_getaddrinfo(node, service, hints, res);
1350 }
1351
1352 int mingw_getnameinfo(const struct sockaddr *sa, socklen_t salen,
1353 char *host, DWORD hostlen, char *serv, DWORD servlen,
1354 int flags)
1355 {
1356 ensure_socket_initialization();
1357 return ipv6_getnameinfo(sa, salen, host, hostlen, serv, servlen, flags);
1358 }
1359
1360 int mingw_socket(int domain, int type, int protocol)
1361 {
1362 int sockfd;
1363 SOCKET s;
1364
1365 ensure_socket_initialization();
1366 s = WSASocket(domain, type, protocol, NULL, 0, 0);
1367 if (s == INVALID_SOCKET) {
1368 /*
1369 * WSAGetLastError() values are regular BSD error codes
1370 * biased by WSABASEERR.
1371 * However, strerror() does not know about networking
1372 * specific errors, which are values beginning at 38 or so.
1373 * Therefore, we choose to leave the biased error code
1374 * in errno so that _if_ someone looks up the code somewhere,
1375 * then it is at least the number that are usually listed.
1376 */
1377 errno = WSAGetLastError();
1378 return -1;
1379 }
1380 /* convert into a file descriptor */
1381 if ((sockfd = _open_osfhandle(s, O_RDWR|O_BINARY)) < 0) {
1382 closesocket(s);
1383 return error("unable to make a socket file descriptor: %s",
1384 strerror(errno));
1385 }
1386 return sockfd;
1387 }
1388
1389 #undef connect
1390 int mingw_connect(int sockfd, struct sockaddr *sa, size_t sz)
1391 {
1392 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
1393 return connect(s, sa, sz);
1394 }
1395
1396 #undef bind
1397 int mingw_bind(int sockfd, struct sockaddr *sa, size_t sz)
1398 {
1399 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
1400 return bind(s, sa, sz);
1401 }
1402
1403 #undef setsockopt
1404 int mingw_setsockopt(int sockfd, int lvl, int optname, void *optval, int optlen)
1405 {
1406 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
1407 return setsockopt(s, lvl, optname, (const char*)optval, optlen);
1408 }
1409
1410 #undef shutdown
1411 int mingw_shutdown(int sockfd, int how)
1412 {
1413 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
1414 return shutdown(s, how);
1415 }
1416
1417 #undef listen
1418 int mingw_listen(int sockfd, int backlog)
1419 {
1420 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
1421 return listen(s, backlog);
1422 }
1423
1424 #undef accept
1425 int mingw_accept(int sockfd1, struct sockaddr *sa, socklen_t *sz)
1426 {
1427 int sockfd2;
1428
1429 SOCKET s1 = (SOCKET)_get_osfhandle(sockfd1);
1430 SOCKET s2 = accept(s1, sa, sz);
1431
1432 /* convert into a file descriptor */
1433 if ((sockfd2 = _open_osfhandle(s2, O_RDWR|O_BINARY)) < 0) {
1434 int err = errno;
1435 closesocket(s2);
1436 return error("unable to make a socket file descriptor: %s",
1437 strerror(err));
1438 }
1439 return sockfd2;
1440 }
1441
1442 #undef rename
1443 int mingw_rename(const char *pold, const char *pnew)
1444 {
1445 DWORD attrs, gle;
1446 int tries = 0;
1447
1448 /*
1449 * Try native rename() first to get errno right.
1450 * It is based on MoveFile(), which cannot overwrite existing files.
1451 */
1452 if (!rename(pold, pnew))
1453 return 0;
1454 if (errno != EEXIST)
1455 return -1;
1456 repeat:
1457 if (MoveFileEx(pold, pnew, MOVEFILE_REPLACE_EXISTING))
1458 return 0;
1459 /* TODO: translate more errors */
1460 gle = GetLastError();
1461 if (gle == ERROR_ACCESS_DENIED &&
1462 (attrs = GetFileAttributes(pnew)) != INVALID_FILE_ATTRIBUTES) {
1463 if (attrs & FILE_ATTRIBUTE_DIRECTORY) {
1464 errno = EISDIR;
1465 return -1;
1466 }
1467 if ((attrs & FILE_ATTRIBUTE_READONLY) &&
1468 SetFileAttributes(pnew, attrs & ~FILE_ATTRIBUTE_READONLY)) {
1469 if (MoveFileEx(pold, pnew, MOVEFILE_REPLACE_EXISTING))
1470 return 0;
1471 gle = GetLastError();
1472 /* revert file attributes on failure */
1473 SetFileAttributes(pnew, attrs);
1474 }
1475 }
1476 if (tries < ARRAY_SIZE(delay) && gle == ERROR_ACCESS_DENIED) {
1477 /*
1478 * We assume that some other process had the source or
1479 * destination file open at the wrong moment and retry.
1480 * In order to give the other process a higher chance to
1481 * complete its operation, we give up our time slice now.
1482 * If we have to retry again, we do sleep a bit.
1483 */
1484 Sleep(delay[tries]);
1485 tries++;
1486 goto repeat;
1487 }
1488 if (gle == ERROR_ACCESS_DENIED &&
1489 ask_yes_no_if_possible("Rename from '%s' to '%s' failed. "
1490 "Should I try again?", pold, pnew))
1491 goto repeat;
1492
1493 errno = EACCES;
1494 return -1;
1495 }
1496
1497 /*
1498 * Note that this doesn't return the actual pagesize, but
1499 * the allocation granularity. If future Windows specific git code
1500 * needs the real getpagesize function, we need to find another solution.
1501 */
1502 int mingw_getpagesize(void)
1503 {
1504 SYSTEM_INFO si;
1505 GetSystemInfo(&si);
1506 return si.dwAllocationGranularity;
1507 }
1508
1509 struct passwd *getpwuid(int uid)
1510 {
1511 static char user_name[100];
1512 static struct passwd p;
1513
1514 DWORD len = sizeof(user_name);
1515 if (!GetUserName(user_name, &len))
1516 return NULL;
1517 p.pw_name = user_name;
1518 p.pw_gecos = "unknown";
1519 p.pw_dir = NULL;
1520 return &p;
1521 }
1522
1523 static HANDLE timer_event;
1524 static HANDLE timer_thread;
1525 static int timer_interval;
1526 static int one_shot;
1527 static sig_handler_t timer_fn = SIG_DFL;
1528
1529 /* The timer works like this:
1530 * The thread, ticktack(), is a trivial routine that most of the time
1531 * only waits to receive the signal to terminate. The main thread tells
1532 * the thread to terminate by setting the timer_event to the signalled
1533 * state.
1534 * But ticktack() interrupts the wait state after the timer's interval
1535 * length to call the signal handler.
1536 */
1537
1538 static unsigned __stdcall ticktack(void *dummy)
1539 {
1540 while (WaitForSingleObject(timer_event, timer_interval) == WAIT_TIMEOUT) {
1541 if (timer_fn == SIG_DFL)
1542 die("Alarm");
1543 if (timer_fn != SIG_IGN)
1544 timer_fn(SIGALRM);
1545 if (one_shot)
1546 break;
1547 }
1548 return 0;
1549 }
1550
1551 static int start_timer_thread(void)
1552 {
1553 timer_event = CreateEvent(NULL, FALSE, FALSE, NULL);
1554 if (timer_event) {
1555 timer_thread = (HANDLE) _beginthreadex(NULL, 0, ticktack, NULL, 0, NULL);
1556 if (!timer_thread )
1557 return errno = ENOMEM,
1558 error("cannot start timer thread");
1559 } else
1560 return errno = ENOMEM,
1561 error("cannot allocate resources for timer");
1562 return 0;
1563 }
1564
1565 static void stop_timer_thread(void)
1566 {
1567 if (timer_event)
1568 SetEvent(timer_event); /* tell thread to terminate */
1569 if (timer_thread) {
1570 int rc = WaitForSingleObject(timer_thread, 1000);
1571 if (rc == WAIT_TIMEOUT)
1572 error("timer thread did not terminate timely");
1573 else if (rc != WAIT_OBJECT_0)
1574 error("waiting for timer thread failed: %lu",
1575 GetLastError());
1576 CloseHandle(timer_thread);
1577 }
1578 if (timer_event)
1579 CloseHandle(timer_event);
1580 timer_event = NULL;
1581 timer_thread = NULL;
1582 }
1583
1584 static inline int is_timeval_eq(const struct timeval *i1, const struct timeval *i2)
1585 {
1586 return i1->tv_sec == i2->tv_sec && i1->tv_usec == i2->tv_usec;
1587 }
1588
1589 int setitimer(int type, struct itimerval *in, struct itimerval *out)
1590 {
1591 static const struct timeval zero;
1592 static int atexit_done;
1593
1594 if (out != NULL)
1595 return errno = EINVAL,
1596 error("setitimer param 3 != NULL not implemented");
1597 if (!is_timeval_eq(&in->it_interval, &zero) &&
1598 !is_timeval_eq(&in->it_interval, &in->it_value))
1599 return errno = EINVAL,
1600 error("setitimer: it_interval must be zero or eq it_value");
1601
1602 if (timer_thread)
1603 stop_timer_thread();
1604
1605 if (is_timeval_eq(&in->it_value, &zero) &&
1606 is_timeval_eq(&in->it_interval, &zero))
1607 return 0;
1608
1609 timer_interval = in->it_value.tv_sec * 1000 + in->it_value.tv_usec / 1000;
1610 one_shot = is_timeval_eq(&in->it_interval, &zero);
1611 if (!atexit_done) {
1612 atexit(stop_timer_thread);
1613 atexit_done = 1;
1614 }
1615 return start_timer_thread();
1616 }
1617
1618 int sigaction(int sig, struct sigaction *in, struct sigaction *out)
1619 {
1620 if (sig != SIGALRM)
1621 return errno = EINVAL,
1622 error("sigaction only implemented for SIGALRM");
1623 if (out != NULL)
1624 return errno = EINVAL,
1625 error("sigaction: param 3 != NULL not implemented");
1626
1627 timer_fn = in->sa_handler;
1628 return 0;
1629 }
1630
1631 #undef signal
1632 sig_handler_t mingw_signal(int sig, sig_handler_t handler)
1633 {
1634 sig_handler_t old = timer_fn;
1635 if (sig != SIGALRM)
1636 return signal(sig, handler);
1637 timer_fn = handler;
1638 return old;
1639 }
1640
1641 static const char *make_backslash_path(const char *path)
1642 {
1643 static char buf[PATH_MAX + 1];
1644 char *c;
1645
1646 if (strlcpy(buf, path, PATH_MAX) >= PATH_MAX)
1647 die("Too long path: %.*s", 60, path);
1648
1649 for (c = buf; *c; c++) {
1650 if (*c == '/')
1651 *c = '\\';
1652 }
1653 return buf;
1654 }
1655
1656 void mingw_open_html(const char *unixpath)
1657 {
1658 const char *htmlpath = make_backslash_path(unixpath);
1659 typedef HINSTANCE (WINAPI *T)(HWND, const char *,
1660 const char *, const char *, const char *, INT);
1661 T ShellExecute;
1662 HMODULE shell32;
1663 int r;
1664
1665 shell32 = LoadLibrary("shell32.dll");
1666 if (!shell32)
1667 die("cannot load shell32.dll");
1668 ShellExecute = (T)GetProcAddress(shell32, "ShellExecuteA");
1669 if (!ShellExecute)
1670 die("cannot run browser");
1671
1672 printf("Launching default browser to display HTML ...\n");
1673 r = (int)ShellExecute(NULL, "open", htmlpath, NULL, "\\", SW_SHOWNORMAL);
1674 FreeLibrary(shell32);
1675 /* see the MSDN documentation referring to the result codes here */
1676 if (r <= 32) {
1677 die("failed to launch browser for %.*s", MAX_PATH, unixpath);
1678 }
1679 }
1680
1681 int link(const char *oldpath, const char *newpath)
1682 {
1683 typedef BOOL (WINAPI *T)(const char*, const char*, LPSECURITY_ATTRIBUTES);
1684 static T create_hard_link = NULL;
1685 if (!create_hard_link) {
1686 create_hard_link = (T) GetProcAddress(
1687 GetModuleHandle("kernel32.dll"), "CreateHardLinkA");
1688 if (!create_hard_link)
1689 create_hard_link = (T)-1;
1690 }
1691 if (create_hard_link == (T)-1) {
1692 errno = ENOSYS;
1693 return -1;
1694 }
1695 if (!create_hard_link(newpath, oldpath, NULL)) {
1696 errno = err_win_to_posix(GetLastError());
1697 return -1;
1698 }
1699 return 0;
1700 }
1701
1702 char *getpass(const char *prompt)
1703 {
1704 struct strbuf buf = STRBUF_INIT;
1705
1706 fputs(prompt, stderr);
1707 for (;;) {
1708 char c = _getch();
1709 if (c == '\r' || c == '\n')
1710 break;
1711 strbuf_addch(&buf, c);
1712 }
1713 fputs("\n", stderr);
1714 return strbuf_detach(&buf, NULL);
1715 }
1716
1717 pid_t waitpid(pid_t pid, int *status, int options)
1718 {
1719 HANDLE h = OpenProcess(SYNCHRONIZE | PROCESS_QUERY_INFORMATION,
1720 FALSE, pid);
1721 if (!h) {
1722 errno = ECHILD;
1723 return -1;
1724 }
1725
1726 if (pid > 0 && options & WNOHANG) {
1727 if (WAIT_OBJECT_0 != WaitForSingleObject(h, 0)) {
1728 CloseHandle(h);
1729 return 0;
1730 }
1731 options &= ~WNOHANG;
1732 }
1733
1734 if (options == 0) {
1735 struct pinfo_t **ppinfo;
1736 if (WaitForSingleObject(h, INFINITE) != WAIT_OBJECT_0) {
1737 CloseHandle(h);
1738 return 0;
1739 }
1740
1741 if (status)
1742 GetExitCodeProcess(h, (LPDWORD)status);
1743
1744 EnterCriticalSection(&pinfo_cs);
1745
1746 ppinfo = &pinfo;
1747 while (*ppinfo) {
1748 struct pinfo_t *info = *ppinfo;
1749 if (info->pid == pid) {
1750 CloseHandle(info->proc);
1751 *ppinfo = info->next;
1752 free(info);
1753 break;
1754 }
1755 ppinfo = &info->next;
1756 }
1757
1758 LeaveCriticalSection(&pinfo_cs);
1759
1760 CloseHandle(h);
1761 return pid;
1762 }
1763 CloseHandle(h);
1764
1765 errno = EINVAL;
1766 return -1;
1767 }