2afc978dfd2dfd74ccb481af6e9618b71a7e3caf
[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
6 static int err_win_to_posix(DWORD winerr)
7 {
8 int error = ENOSYS;
9 switch(winerr) {
10 case ERROR_ACCESS_DENIED: error = EACCES; break;
11 case ERROR_ACCOUNT_DISABLED: error = EACCES; break;
12 case ERROR_ACCOUNT_RESTRICTION: error = EACCES; break;
13 case ERROR_ALREADY_ASSIGNED: error = EBUSY; break;
14 case ERROR_ALREADY_EXISTS: error = EEXIST; break;
15 case ERROR_ARITHMETIC_OVERFLOW: error = ERANGE; break;
16 case ERROR_BAD_COMMAND: error = EIO; break;
17 case ERROR_BAD_DEVICE: error = ENODEV; break;
18 case ERROR_BAD_DRIVER_LEVEL: error = ENXIO; break;
19 case ERROR_BAD_EXE_FORMAT: error = ENOEXEC; break;
20 case ERROR_BAD_FORMAT: error = ENOEXEC; break;
21 case ERROR_BAD_LENGTH: error = EINVAL; break;
22 case ERROR_BAD_PATHNAME: error = ENOENT; break;
23 case ERROR_BAD_PIPE: error = EPIPE; break;
24 case ERROR_BAD_UNIT: error = ENODEV; break;
25 case ERROR_BAD_USERNAME: error = EINVAL; break;
26 case ERROR_BROKEN_PIPE: error = EPIPE; break;
27 case ERROR_BUFFER_OVERFLOW: error = ENAMETOOLONG; break;
28 case ERROR_BUSY: error = EBUSY; break;
29 case ERROR_BUSY_DRIVE: error = EBUSY; break;
30 case ERROR_CALL_NOT_IMPLEMENTED: error = ENOSYS; break;
31 case ERROR_CANNOT_MAKE: error = EACCES; break;
32 case ERROR_CANTOPEN: error = EIO; break;
33 case ERROR_CANTREAD: error = EIO; break;
34 case ERROR_CANTWRITE: error = EIO; break;
35 case ERROR_CRC: error = EIO; break;
36 case ERROR_CURRENT_DIRECTORY: error = EACCES; break;
37 case ERROR_DEVICE_IN_USE: error = EBUSY; break;
38 case ERROR_DEV_NOT_EXIST: error = ENODEV; break;
39 case ERROR_DIRECTORY: error = EINVAL; break;
40 case ERROR_DIR_NOT_EMPTY: error = ENOTEMPTY; break;
41 case ERROR_DISK_CHANGE: error = EIO; break;
42 case ERROR_DISK_FULL: error = ENOSPC; break;
43 case ERROR_DRIVE_LOCKED: error = EBUSY; break;
44 case ERROR_ENVVAR_NOT_FOUND: error = EINVAL; break;
45 case ERROR_EXE_MARKED_INVALID: error = ENOEXEC; break;
46 case ERROR_FILENAME_EXCED_RANGE: error = ENAMETOOLONG; break;
47 case ERROR_FILE_EXISTS: error = EEXIST; break;
48 case ERROR_FILE_INVALID: error = ENODEV; break;
49 case ERROR_FILE_NOT_FOUND: error = ENOENT; break;
50 case ERROR_GEN_FAILURE: error = EIO; break;
51 case ERROR_HANDLE_DISK_FULL: error = ENOSPC; break;
52 case ERROR_INSUFFICIENT_BUFFER: error = ENOMEM; break;
53 case ERROR_INVALID_ACCESS: error = EACCES; break;
54 case ERROR_INVALID_ADDRESS: error = EFAULT; break;
55 case ERROR_INVALID_BLOCK: error = EFAULT; break;
56 case ERROR_INVALID_DATA: error = EINVAL; break;
57 case ERROR_INVALID_DRIVE: error = ENODEV; break;
58 case ERROR_INVALID_EXE_SIGNATURE: error = ENOEXEC; break;
59 case ERROR_INVALID_FLAGS: error = EINVAL; break;
60 case ERROR_INVALID_FUNCTION: error = ENOSYS; break;
61 case ERROR_INVALID_HANDLE: error = EBADF; break;
62 case ERROR_INVALID_LOGON_HOURS: error = EACCES; break;
63 case ERROR_INVALID_NAME: error = EINVAL; break;
64 case ERROR_INVALID_OWNER: error = EINVAL; break;
65 case ERROR_INVALID_PARAMETER: error = EINVAL; break;
66 case ERROR_INVALID_PASSWORD: error = EPERM; break;
67 case ERROR_INVALID_PRIMARY_GROUP: error = EINVAL; break;
68 case ERROR_INVALID_SIGNAL_NUMBER: error = EINVAL; break;
69 case ERROR_INVALID_TARGET_HANDLE: error = EIO; break;
70 case ERROR_INVALID_WORKSTATION: error = EACCES; break;
71 case ERROR_IO_DEVICE: error = EIO; break;
72 case ERROR_IO_INCOMPLETE: error = EINTR; break;
73 case ERROR_LOCKED: error = EBUSY; break;
74 case ERROR_LOCK_VIOLATION: error = EACCES; break;
75 case ERROR_LOGON_FAILURE: error = EACCES; break;
76 case ERROR_MAPPED_ALIGNMENT: error = EINVAL; break;
77 case ERROR_META_EXPANSION_TOO_LONG: error = E2BIG; break;
78 case ERROR_MORE_DATA: error = EPIPE; break;
79 case ERROR_NEGATIVE_SEEK: error = ESPIPE; break;
80 case ERROR_NOACCESS: error = EFAULT; break;
81 case ERROR_NONE_MAPPED: error = EINVAL; break;
82 case ERROR_NOT_ENOUGH_MEMORY: error = ENOMEM; break;
83 case ERROR_NOT_READY: error = EAGAIN; break;
84 case ERROR_NOT_SAME_DEVICE: error = EXDEV; break;
85 case ERROR_NO_DATA: error = EPIPE; break;
86 case ERROR_NO_MORE_SEARCH_HANDLES: error = EIO; break;
87 case ERROR_NO_PROC_SLOTS: error = EAGAIN; break;
88 case ERROR_NO_SUCH_PRIVILEGE: error = EACCES; break;
89 case ERROR_OPEN_FAILED: error = EIO; break;
90 case ERROR_OPEN_FILES: error = EBUSY; break;
91 case ERROR_OPERATION_ABORTED: error = EINTR; break;
92 case ERROR_OUTOFMEMORY: error = ENOMEM; break;
93 case ERROR_PASSWORD_EXPIRED: error = EACCES; break;
94 case ERROR_PATH_BUSY: error = EBUSY; break;
95 case ERROR_PATH_NOT_FOUND: error = ENOENT; break;
96 case ERROR_PIPE_BUSY: error = EBUSY; break;
97 case ERROR_PIPE_CONNECTED: error = EPIPE; break;
98 case ERROR_PIPE_LISTENING: error = EPIPE; break;
99 case ERROR_PIPE_NOT_CONNECTED: error = EPIPE; break;
100 case ERROR_PRIVILEGE_NOT_HELD: error = EACCES; break;
101 case ERROR_READ_FAULT: error = EIO; break;
102 case ERROR_SEEK: error = EIO; break;
103 case ERROR_SEEK_ON_DEVICE: error = ESPIPE; break;
104 case ERROR_SHARING_BUFFER_EXCEEDED: error = ENFILE; break;
105 case ERROR_SHARING_VIOLATION: error = EACCES; break;
106 case ERROR_STACK_OVERFLOW: error = ENOMEM; break;
107 case ERROR_SWAPERROR: error = ENOENT; break;
108 case ERROR_TOO_MANY_MODULES: error = EMFILE; break;
109 case ERROR_TOO_MANY_OPEN_FILES: error = EMFILE; break;
110 case ERROR_UNRECOGNIZED_MEDIA: error = ENXIO; break;
111 case ERROR_UNRECOGNIZED_VOLUME: error = ENODEV; break;
112 case ERROR_WAIT_NO_CHILDREN: error = ECHILD; break;
113 case ERROR_WRITE_FAULT: error = EIO; break;
114 case ERROR_WRITE_PROTECT: error = EROFS; break;
115 }
116 return error;
117 }
118
119 #undef open
120 int mingw_open (const char *filename, int oflags, ...)
121 {
122 va_list args;
123 unsigned mode;
124 int fd;
125
126 va_start(args, oflags);
127 mode = va_arg(args, int);
128 va_end(args);
129
130 if (!strcmp(filename, "/dev/null"))
131 filename = "nul";
132
133 fd = open(filename, oflags, mode);
134
135 if (fd < 0 && (oflags & O_CREAT) && errno == EACCES) {
136 DWORD attrs = GetFileAttributes(filename);
137 if (attrs != INVALID_FILE_ATTRIBUTES && (attrs & FILE_ATTRIBUTE_DIRECTORY))
138 errno = EISDIR;
139 }
140 return fd;
141 }
142
143 static inline time_t filetime_to_time_t(const FILETIME *ft)
144 {
145 long long winTime = ((long long)ft->dwHighDateTime << 32) + ft->dwLowDateTime;
146 winTime -= 116444736000000000LL; /* Windows to Unix Epoch conversion */
147 winTime /= 10000000; /* Nano to seconds resolution */
148 return (time_t)winTime;
149 }
150
151 /* We keep the do_lstat code in a separate function to avoid recursion.
152 * When a path ends with a slash, the stat will fail with ENOENT. In
153 * this case, we strip the trailing slashes and stat again.
154 */
155 static int do_lstat(const char *file_name, struct stat *buf)
156 {
157 WIN32_FILE_ATTRIBUTE_DATA fdata;
158
159 if (!(errno = get_file_attr(file_name, &fdata))) {
160 buf->st_ino = 0;
161 buf->st_gid = 0;
162 buf->st_uid = 0;
163 buf->st_nlink = 1;
164 buf->st_mode = file_attr_to_st_mode(fdata.dwFileAttributes);
165 buf->st_size = fdata.nFileSizeLow |
166 (((off_t)fdata.nFileSizeHigh)<<32);
167 buf->st_dev = buf->st_rdev = 0; /* not used by Git */
168 buf->st_atime = filetime_to_time_t(&(fdata.ftLastAccessTime));
169 buf->st_mtime = filetime_to_time_t(&(fdata.ftLastWriteTime));
170 buf->st_ctime = filetime_to_time_t(&(fdata.ftCreationTime));
171 return 0;
172 }
173 return -1;
174 }
175
176 /* We provide our own lstat/fstat functions, since the provided
177 * lstat/fstat functions are so slow. These stat functions are
178 * tailored for Git's usage (read: fast), and are not meant to be
179 * complete. Note that Git stat()s are redirected to mingw_lstat()
180 * too, since Windows doesn't really handle symlinks that well.
181 */
182 int mingw_lstat(const char *file_name, struct stat *buf)
183 {
184 int namelen;
185 static char alt_name[PATH_MAX];
186
187 if (!do_lstat(file_name, buf))
188 return 0;
189
190 /* if file_name ended in a '/', Windows returned ENOENT;
191 * try again without trailing slashes
192 */
193 if (errno != ENOENT)
194 return -1;
195
196 namelen = strlen(file_name);
197 if (namelen && file_name[namelen-1] != '/')
198 return -1;
199 while (namelen && file_name[namelen-1] == '/')
200 --namelen;
201 if (!namelen || namelen >= PATH_MAX)
202 return -1;
203
204 memcpy(alt_name, file_name, namelen);
205 alt_name[namelen] = 0;
206 return do_lstat(alt_name, buf);
207 }
208
209 #undef fstat
210 int mingw_fstat(int fd, struct stat *buf)
211 {
212 HANDLE fh = (HANDLE)_get_osfhandle(fd);
213 BY_HANDLE_FILE_INFORMATION fdata;
214
215 if (fh == INVALID_HANDLE_VALUE) {
216 errno = EBADF;
217 return -1;
218 }
219 /* direct non-file handles to MS's fstat() */
220 if (GetFileType(fh) != FILE_TYPE_DISK)
221 return _fstati64(fd, buf);
222
223 if (GetFileInformationByHandle(fh, &fdata)) {
224 buf->st_ino = 0;
225 buf->st_gid = 0;
226 buf->st_uid = 0;
227 buf->st_nlink = 1;
228 buf->st_mode = file_attr_to_st_mode(fdata.dwFileAttributes);
229 buf->st_size = fdata.nFileSizeLow |
230 (((off_t)fdata.nFileSizeHigh)<<32);
231 buf->st_dev = buf->st_rdev = 0; /* not used by Git */
232 buf->st_atime = filetime_to_time_t(&(fdata.ftLastAccessTime));
233 buf->st_mtime = filetime_to_time_t(&(fdata.ftLastWriteTime));
234 buf->st_ctime = filetime_to_time_t(&(fdata.ftCreationTime));
235 return 0;
236 }
237 errno = EBADF;
238 return -1;
239 }
240
241 static inline void time_t_to_filetime(time_t t, FILETIME *ft)
242 {
243 long long winTime = t * 10000000LL + 116444736000000000LL;
244 ft->dwLowDateTime = winTime;
245 ft->dwHighDateTime = winTime >> 32;
246 }
247
248 int mingw_utime (const char *file_name, const struct utimbuf *times)
249 {
250 FILETIME mft, aft;
251 int fh, rc;
252
253 /* must have write permission */
254 if ((fh = open(file_name, O_RDWR | O_BINARY)) < 0)
255 return -1;
256
257 time_t_to_filetime(times->modtime, &mft);
258 time_t_to_filetime(times->actime, &aft);
259 if (!SetFileTime((HANDLE)_get_osfhandle(fh), NULL, &aft, &mft)) {
260 errno = EINVAL;
261 rc = -1;
262 } else
263 rc = 0;
264 close(fh);
265 return rc;
266 }
267
268 unsigned int sleep (unsigned int seconds)
269 {
270 Sleep(seconds*1000);
271 return 0;
272 }
273
274 int mkstemp(char *template)
275 {
276 char *filename = mktemp(template);
277 if (filename == NULL)
278 return -1;
279 return open(filename, O_RDWR | O_CREAT, 0600);
280 }
281
282 int gettimeofday(struct timeval *tv, void *tz)
283 {
284 SYSTEMTIME st;
285 struct tm tm;
286 GetSystemTime(&st);
287 tm.tm_year = st.wYear-1900;
288 tm.tm_mon = st.wMonth-1;
289 tm.tm_mday = st.wDay;
290 tm.tm_hour = st.wHour;
291 tm.tm_min = st.wMinute;
292 tm.tm_sec = st.wSecond;
293 tv->tv_sec = tm_to_time_t(&tm);
294 if (tv->tv_sec < 0)
295 return -1;
296 tv->tv_usec = st.wMilliseconds*1000;
297 return 0;
298 }
299
300 int pipe(int filedes[2])
301 {
302 int fd;
303 HANDLE h[2], parent;
304
305 if (_pipe(filedes, 8192, 0) < 0)
306 return -1;
307
308 parent = GetCurrentProcess();
309
310 if (!DuplicateHandle (parent, (HANDLE)_get_osfhandle(filedes[0]),
311 parent, &h[0], 0, FALSE, DUPLICATE_SAME_ACCESS)) {
312 close(filedes[0]);
313 close(filedes[1]);
314 return -1;
315 }
316 if (!DuplicateHandle (parent, (HANDLE)_get_osfhandle(filedes[1]),
317 parent, &h[1], 0, FALSE, DUPLICATE_SAME_ACCESS)) {
318 close(filedes[0]);
319 close(filedes[1]);
320 CloseHandle(h[0]);
321 return -1;
322 }
323 fd = _open_osfhandle((int)h[0], O_NOINHERIT);
324 if (fd < 0) {
325 close(filedes[0]);
326 close(filedes[1]);
327 CloseHandle(h[0]);
328 CloseHandle(h[1]);
329 return -1;
330 }
331 close(filedes[0]);
332 filedes[0] = fd;
333 fd = _open_osfhandle((int)h[1], O_NOINHERIT);
334 if (fd < 0) {
335 close(filedes[0]);
336 close(filedes[1]);
337 CloseHandle(h[1]);
338 return -1;
339 }
340 close(filedes[1]);
341 filedes[1] = fd;
342 return 0;
343 }
344
345 int poll(struct pollfd *ufds, unsigned int nfds, int timeout)
346 {
347 int i, pending;
348
349 if (timeout >= 0) {
350 if (nfds == 0) {
351 Sleep(timeout);
352 return 0;
353 }
354 return errno = EINVAL, error("poll timeout not supported");
355 }
356
357 /* When there is only one fd to wait for, then we pretend that
358 * input is available and let the actual wait happen when the
359 * caller invokes read().
360 */
361 if (nfds == 1) {
362 if (!(ufds[0].events & POLLIN))
363 return errno = EINVAL, error("POLLIN not set");
364 ufds[0].revents = POLLIN;
365 return 0;
366 }
367
368 repeat:
369 pending = 0;
370 for (i = 0; i < nfds; i++) {
371 DWORD avail = 0;
372 HANDLE h = (HANDLE) _get_osfhandle(ufds[i].fd);
373 if (h == INVALID_HANDLE_VALUE)
374 return -1; /* errno was set */
375
376 if (!(ufds[i].events & POLLIN))
377 return errno = EINVAL, error("POLLIN not set");
378
379 /* this emulation works only for pipes */
380 if (!PeekNamedPipe(h, NULL, 0, NULL, &avail, NULL)) {
381 int err = GetLastError();
382 if (err == ERROR_BROKEN_PIPE) {
383 ufds[i].revents = POLLHUP;
384 pending++;
385 } else {
386 errno = EINVAL;
387 return error("PeekNamedPipe failed,"
388 " GetLastError: %u", err);
389 }
390 } else if (avail) {
391 ufds[i].revents = POLLIN;
392 pending++;
393 } else
394 ufds[i].revents = 0;
395 }
396 if (!pending) {
397 /* The only times that we spin here is when the process
398 * that is connected through the pipes is waiting for
399 * its own input data to become available. But since
400 * the process (pack-objects) is itself CPU intensive,
401 * it will happily pick up the time slice that we are
402 * relinquishing here.
403 */
404 Sleep(0);
405 goto repeat;
406 }
407 return 0;
408 }
409
410 struct tm *gmtime_r(const time_t *timep, struct tm *result)
411 {
412 /* gmtime() in MSVCRT.DLL is thread-safe, but not reentrant */
413 memcpy(result, gmtime(timep), sizeof(struct tm));
414 return result;
415 }
416
417 struct tm *localtime_r(const time_t *timep, struct tm *result)
418 {
419 /* localtime() in MSVCRT.DLL is thread-safe, but not reentrant */
420 memcpy(result, localtime(timep), sizeof(struct tm));
421 return result;
422 }
423
424 #undef getcwd
425 char *mingw_getcwd(char *pointer, int len)
426 {
427 int i;
428 char *ret = getcwd(pointer, len);
429 if (!ret)
430 return ret;
431 for (i = 0; pointer[i]; i++)
432 if (pointer[i] == '\\')
433 pointer[i] = '/';
434 return ret;
435 }
436
437 #undef getenv
438 char *mingw_getenv(const char *name)
439 {
440 char *result = getenv(name);
441 if (!result && !strcmp(name, "TMPDIR")) {
442 /* on Windows it is TMP and TEMP */
443 result = getenv("TMP");
444 if (!result)
445 result = getenv("TEMP");
446 }
447 return result;
448 }
449
450 /*
451 * See http://msdn2.microsoft.com/en-us/library/17w5ykft(vs.71).aspx
452 * (Parsing C++ Command-Line Arguments)
453 */
454 static const char *quote_arg(const char *arg)
455 {
456 /* count chars to quote */
457 int len = 0, n = 0;
458 int force_quotes = 0;
459 char *q, *d;
460 const char *p = arg;
461 if (!*p) force_quotes = 1;
462 while (*p) {
463 if (isspace(*p) || *p == '*' || *p == '?' || *p == '{' || *p == '\'')
464 force_quotes = 1;
465 else if (*p == '"')
466 n++;
467 else if (*p == '\\') {
468 int count = 0;
469 while (*p == '\\') {
470 count++;
471 p++;
472 len++;
473 }
474 if (*p == '"')
475 n += count*2 + 1;
476 continue;
477 }
478 len++;
479 p++;
480 }
481 if (!force_quotes && n == 0)
482 return arg;
483
484 /* insert \ where necessary */
485 d = q = xmalloc(len+n+3);
486 *d++ = '"';
487 while (*arg) {
488 if (*arg == '"')
489 *d++ = '\\';
490 else if (*arg == '\\') {
491 int count = 0;
492 while (*arg == '\\') {
493 count++;
494 *d++ = *arg++;
495 }
496 if (*arg == '"') {
497 while (count-- > 0)
498 *d++ = '\\';
499 *d++ = '\\';
500 }
501 }
502 *d++ = *arg++;
503 }
504 *d++ = '"';
505 *d++ = 0;
506 return q;
507 }
508
509 static const char *parse_interpreter(const char *cmd)
510 {
511 static char buf[100];
512 char *p, *opt;
513 int n, fd;
514
515 /* don't even try a .exe */
516 n = strlen(cmd);
517 if (n >= 4 && !strcasecmp(cmd+n-4, ".exe"))
518 return NULL;
519
520 fd = open(cmd, O_RDONLY);
521 if (fd < 0)
522 return NULL;
523 n = read(fd, buf, sizeof(buf)-1);
524 close(fd);
525 if (n < 4) /* at least '#!/x' and not error */
526 return NULL;
527
528 if (buf[0] != '#' || buf[1] != '!')
529 return NULL;
530 buf[n] = '\0';
531 p = buf + strcspn(buf, "\r\n");
532 if (!*p)
533 return NULL;
534
535 *p = '\0';
536 if (!(p = strrchr(buf+2, '/')) && !(p = strrchr(buf+2, '\\')))
537 return NULL;
538 /* strip options */
539 if ((opt = strchr(p+1, ' ')))
540 *opt = '\0';
541 return p+1;
542 }
543
544 /*
545 * Splits the PATH into parts.
546 */
547 static char **get_path_split(void)
548 {
549 char *p, **path, *envpath = getenv("PATH");
550 int i, n = 0;
551
552 if (!envpath || !*envpath)
553 return NULL;
554
555 envpath = xstrdup(envpath);
556 p = envpath;
557 while (p) {
558 char *dir = p;
559 p = strchr(p, ';');
560 if (p) *p++ = '\0';
561 if (*dir) { /* not earlier, catches series of ; */
562 ++n;
563 }
564 }
565 if (!n)
566 return NULL;
567
568 path = xmalloc((n+1)*sizeof(char *));
569 p = envpath;
570 i = 0;
571 do {
572 if (*p)
573 path[i++] = xstrdup(p);
574 p = p+strlen(p)+1;
575 } while (i < n);
576 path[i] = NULL;
577
578 free(envpath);
579
580 return path;
581 }
582
583 static void free_path_split(char **path)
584 {
585 char **p = path;
586
587 if (!path)
588 return;
589
590 while (*p)
591 free(*p++);
592 free(path);
593 }
594
595 /*
596 * exe_only means that we only want to detect .exe files, but not scripts
597 * (which do not have an extension)
598 */
599 static char *lookup_prog(const char *dir, const char *cmd, int isexe, int exe_only)
600 {
601 char path[MAX_PATH];
602 snprintf(path, sizeof(path), "%s/%s.exe", dir, cmd);
603
604 if (!isexe && access(path, F_OK) == 0)
605 return xstrdup(path);
606 path[strlen(path)-4] = '\0';
607 if ((!exe_only || isexe) && access(path, F_OK) == 0)
608 if (!(GetFileAttributes(path) & FILE_ATTRIBUTE_DIRECTORY))
609 return xstrdup(path);
610 return NULL;
611 }
612
613 /*
614 * Determines the absolute path of cmd using the the split path in path.
615 * If cmd contains a slash or backslash, no lookup is performed.
616 */
617 static char *path_lookup(const char *cmd, char **path, int exe_only)
618 {
619 char *prog = NULL;
620 int len = strlen(cmd);
621 int isexe = len >= 4 && !strcasecmp(cmd+len-4, ".exe");
622
623 if (strchr(cmd, '/') || strchr(cmd, '\\'))
624 prog = xstrdup(cmd);
625
626 while (!prog && *path)
627 prog = lookup_prog(*path++, cmd, isexe, exe_only);
628
629 return prog;
630 }
631
632 static int env_compare(const void *a, const void *b)
633 {
634 char *const *ea = a;
635 char *const *eb = b;
636 return strcasecmp(*ea, *eb);
637 }
638
639 static pid_t mingw_spawnve(const char *cmd, const char **argv, char **env,
640 int prepend_cmd)
641 {
642 STARTUPINFO si;
643 PROCESS_INFORMATION pi;
644 struct strbuf envblk, args;
645 unsigned flags;
646 BOOL ret;
647
648 /* Determine whether or not we are associated to a console */
649 HANDLE cons = CreateFile("CONOUT$", GENERIC_WRITE,
650 FILE_SHARE_WRITE, NULL, OPEN_EXISTING,
651 FILE_ATTRIBUTE_NORMAL, NULL);
652 if (cons == INVALID_HANDLE_VALUE) {
653 /* There is no console associated with this process.
654 * Since the child is a console process, Windows
655 * would normally create a console window. But
656 * since we'll be redirecting std streams, we do
657 * not need the console.
658 * It is necessary to use DETACHED_PROCESS
659 * instead of CREATE_NO_WINDOW to make ssh
660 * recognize that it has no console.
661 */
662 flags = DETACHED_PROCESS;
663 } else {
664 /* There is already a console. If we specified
665 * DETACHED_PROCESS here, too, Windows would
666 * disassociate the child from the console.
667 * The same is true for CREATE_NO_WINDOW.
668 * Go figure!
669 */
670 flags = 0;
671 CloseHandle(cons);
672 }
673 memset(&si, 0, sizeof(si));
674 si.cb = sizeof(si);
675 si.dwFlags = STARTF_USESTDHANDLES;
676 si.hStdInput = (HANDLE) _get_osfhandle(0);
677 si.hStdOutput = (HANDLE) _get_osfhandle(1);
678 si.hStdError = (HANDLE) _get_osfhandle(2);
679
680 /* concatenate argv, quoting args as we go */
681 strbuf_init(&args, 0);
682 if (prepend_cmd) {
683 char *quoted = (char *)quote_arg(cmd);
684 strbuf_addstr(&args, quoted);
685 if (quoted != cmd)
686 free(quoted);
687 }
688 for (; *argv; argv++) {
689 char *quoted = (char *)quote_arg(*argv);
690 if (*args.buf)
691 strbuf_addch(&args, ' ');
692 strbuf_addstr(&args, quoted);
693 if (quoted != *argv)
694 free(quoted);
695 }
696
697 if (env) {
698 int count = 0;
699 char **e, **sorted_env;
700
701 for (e = env; *e; e++)
702 count++;
703
704 /* environment must be sorted */
705 sorted_env = xmalloc(sizeof(*sorted_env) * (count + 1));
706 memcpy(sorted_env, env, sizeof(*sorted_env) * (count + 1));
707 qsort(sorted_env, count, sizeof(*sorted_env), env_compare);
708
709 strbuf_init(&envblk, 0);
710 for (e = sorted_env; *e; e++) {
711 strbuf_addstr(&envblk, *e);
712 strbuf_addch(&envblk, '\0');
713 }
714 free(sorted_env);
715 }
716
717 memset(&pi, 0, sizeof(pi));
718 ret = CreateProcess(cmd, args.buf, NULL, NULL, TRUE, flags,
719 env ? envblk.buf : NULL, NULL, &si, &pi);
720
721 if (env)
722 strbuf_release(&envblk);
723 strbuf_release(&args);
724
725 if (!ret) {
726 errno = ENOENT;
727 return -1;
728 }
729 CloseHandle(pi.hThread);
730 return (pid_t)pi.hProcess;
731 }
732
733 pid_t mingw_spawnvpe(const char *cmd, const char **argv, char **env)
734 {
735 pid_t pid;
736 char **path = get_path_split();
737 char *prog = path_lookup(cmd, path, 0);
738
739 if (!prog) {
740 errno = ENOENT;
741 pid = -1;
742 }
743 else {
744 const char *interpr = parse_interpreter(prog);
745
746 if (interpr) {
747 const char *argv0 = argv[0];
748 char *iprog = path_lookup(interpr, path, 1);
749 argv[0] = prog;
750 if (!iprog) {
751 errno = ENOENT;
752 pid = -1;
753 }
754 else {
755 pid = mingw_spawnve(iprog, argv, env, 1);
756 free(iprog);
757 }
758 argv[0] = argv0;
759 }
760 else
761 pid = mingw_spawnve(prog, argv, env, 0);
762 free(prog);
763 }
764 free_path_split(path);
765 return pid;
766 }
767
768 static int try_shell_exec(const char *cmd, char *const *argv, char **env)
769 {
770 const char *interpr = parse_interpreter(cmd);
771 char **path;
772 char *prog;
773 int pid = 0;
774
775 if (!interpr)
776 return 0;
777 path = get_path_split();
778 prog = path_lookup(interpr, path, 1);
779 if (prog) {
780 int argc = 0;
781 const char **argv2;
782 while (argv[argc]) argc++;
783 argv2 = xmalloc(sizeof(*argv) * (argc+1));
784 argv2[0] = (char *)cmd; /* full path to the script file */
785 memcpy(&argv2[1], &argv[1], sizeof(*argv) * argc);
786 pid = mingw_spawnve(prog, argv2, env, 1);
787 if (pid >= 0) {
788 int status;
789 if (waitpid(pid, &status, 0) < 0)
790 status = 255;
791 exit(status);
792 }
793 pid = 1; /* indicate that we tried but failed */
794 free(prog);
795 free(argv2);
796 }
797 free_path_split(path);
798 return pid;
799 }
800
801 static void mingw_execve(const char *cmd, char *const *argv, char *const *env)
802 {
803 /* check if git_command is a shell script */
804 if (!try_shell_exec(cmd, argv, (char **)env)) {
805 int pid, status;
806
807 pid = mingw_spawnve(cmd, (const char **)argv, (char **)env, 0);
808 if (pid < 0)
809 return;
810 if (waitpid(pid, &status, 0) < 0)
811 status = 255;
812 exit(status);
813 }
814 }
815
816 void mingw_execvp(const char *cmd, char *const *argv)
817 {
818 char **path = get_path_split();
819 char *prog = path_lookup(cmd, path, 0);
820
821 if (prog) {
822 mingw_execve(prog, argv, environ);
823 free(prog);
824 } else
825 errno = ENOENT;
826
827 free_path_split(path);
828 }
829
830 static char **copy_environ(void)
831 {
832 char **env;
833 int i = 0;
834 while (environ[i])
835 i++;
836 env = xmalloc((i+1)*sizeof(*env));
837 for (i = 0; environ[i]; i++)
838 env[i] = xstrdup(environ[i]);
839 env[i] = NULL;
840 return env;
841 }
842
843 void free_environ(char **env)
844 {
845 int i;
846 for (i = 0; env[i]; i++)
847 free(env[i]);
848 free(env);
849 }
850
851 static int lookup_env(char **env, const char *name, size_t nmln)
852 {
853 int i;
854
855 for (i = 0; env[i]; i++) {
856 if (0 == strncmp(env[i], name, nmln)
857 && '=' == env[i][nmln])
858 /* matches */
859 return i;
860 }
861 return -1;
862 }
863
864 /*
865 * If name contains '=', then sets the variable, otherwise it unsets it
866 */
867 static char **env_setenv(char **env, const char *name)
868 {
869 char *eq = strchrnul(name, '=');
870 int i = lookup_env(env, name, eq-name);
871
872 if (i < 0) {
873 if (*eq) {
874 for (i = 0; env[i]; i++)
875 ;
876 env = xrealloc(env, (i+2)*sizeof(*env));
877 env[i] = xstrdup(name);
878 env[i+1] = NULL;
879 }
880 }
881 else {
882 free(env[i]);
883 if (*eq)
884 env[i] = xstrdup(name);
885 else
886 for (; env[i]; i++)
887 env[i] = env[i+1];
888 }
889 return env;
890 }
891
892 /*
893 * Copies global environ and adjusts variables as specified by vars.
894 */
895 char **make_augmented_environ(const char *const *vars)
896 {
897 char **env = copy_environ();
898
899 while (*vars)
900 env = env_setenv(env, *vars++);
901 return env;
902 }
903
904 /*
905 * Note, this isn't a complete replacement for getaddrinfo. It assumes
906 * that service contains a numerical port, or that it it is null. It
907 * does a simple search using gethostbyname, and returns one IPv4 host
908 * if one was found.
909 */
910 static int WSAAPI getaddrinfo_stub(const char *node, const char *service,
911 const struct addrinfo *hints,
912 struct addrinfo **res)
913 {
914 struct hostent *h = gethostbyname(node);
915 struct addrinfo *ai;
916 struct sockaddr_in *sin;
917
918 if (!h)
919 return WSAGetLastError();
920
921 ai = xmalloc(sizeof(struct addrinfo));
922 *res = ai;
923 ai->ai_flags = 0;
924 ai->ai_family = AF_INET;
925 ai->ai_socktype = hints->ai_socktype;
926 switch (hints->ai_socktype) {
927 case SOCK_STREAM:
928 ai->ai_protocol = IPPROTO_TCP;
929 break;
930 case SOCK_DGRAM:
931 ai->ai_protocol = IPPROTO_UDP;
932 break;
933 default:
934 ai->ai_protocol = 0;
935 break;
936 }
937 ai->ai_addrlen = sizeof(struct sockaddr_in);
938 ai->ai_canonname = strdup(h->h_name);
939
940 sin = xmalloc(ai->ai_addrlen);
941 memset(sin, 0, ai->ai_addrlen);
942 sin->sin_family = AF_INET;
943 if (service)
944 sin->sin_port = htons(atoi(service));
945 sin->sin_addr = *(struct in_addr *)h->h_addr;
946 ai->ai_addr = (struct sockaddr *)sin;
947 ai->ai_next = 0;
948 return 0;
949 }
950
951 static void WSAAPI freeaddrinfo_stub(struct addrinfo *res)
952 {
953 free(res->ai_canonname);
954 free(res->ai_addr);
955 free(res);
956 }
957
958 static int WSAAPI getnameinfo_stub(const struct sockaddr *sa, socklen_t salen,
959 char *host, DWORD hostlen,
960 char *serv, DWORD servlen, int flags)
961 {
962 const struct sockaddr_in *sin = (const struct sockaddr_in *)sa;
963 if (sa->sa_family != AF_INET)
964 return EAI_FAMILY;
965 if (!host && !serv)
966 return EAI_NONAME;
967
968 if (host && hostlen > 0) {
969 struct hostent *ent = NULL;
970 if (!(flags & NI_NUMERICHOST))
971 ent = gethostbyaddr((const char *)&sin->sin_addr,
972 sizeof(sin->sin_addr), AF_INET);
973
974 if (ent)
975 snprintf(host, hostlen, "%s", ent->h_name);
976 else if (flags & NI_NAMEREQD)
977 return EAI_NONAME;
978 else
979 snprintf(host, hostlen, "%s", inet_ntoa(sin->sin_addr));
980 }
981
982 if (serv && servlen > 0) {
983 struct servent *ent = NULL;
984 if (!(flags & NI_NUMERICSERV))
985 ent = getservbyport(sin->sin_port,
986 flags & NI_DGRAM ? "udp" : "tcp");
987
988 if (ent)
989 snprintf(serv, servlen, "%s", ent->s_name);
990 else
991 snprintf(serv, servlen, "%d", ntohs(sin->sin_port));
992 }
993
994 return 0;
995 }
996
997 static HMODULE ipv6_dll = NULL;
998 static void (WSAAPI *ipv6_freeaddrinfo)(struct addrinfo *res);
999 static int (WSAAPI *ipv6_getaddrinfo)(const char *node, const char *service,
1000 const struct addrinfo *hints,
1001 struct addrinfo **res);
1002 static int (WSAAPI *ipv6_getnameinfo)(const struct sockaddr *sa, socklen_t salen,
1003 char *host, DWORD hostlen,
1004 char *serv, DWORD servlen, int flags);
1005 /*
1006 * gai_strerror is an inline function in the ws2tcpip.h header, so we
1007 * don't need to try to load that one dynamically.
1008 */
1009
1010 static void socket_cleanup(void)
1011 {
1012 WSACleanup();
1013 if (ipv6_dll)
1014 FreeLibrary(ipv6_dll);
1015 ipv6_dll = NULL;
1016 ipv6_freeaddrinfo = freeaddrinfo_stub;
1017 ipv6_getaddrinfo = getaddrinfo_stub;
1018 ipv6_getnameinfo = getnameinfo_stub;
1019 }
1020
1021 static void ensure_socket_initialization(void)
1022 {
1023 WSADATA wsa;
1024 static int initialized = 0;
1025 const char *libraries[] = { "ws2_32.dll", "wship6.dll", NULL };
1026 const char **name;
1027
1028 if (initialized)
1029 return;
1030
1031 if (WSAStartup(MAKEWORD(2,2), &wsa))
1032 die("unable to initialize winsock subsystem, error %d",
1033 WSAGetLastError());
1034
1035 for (name = libraries; *name; name++) {
1036 ipv6_dll = LoadLibrary(*name);
1037 if (!ipv6_dll)
1038 continue;
1039
1040 ipv6_freeaddrinfo = (void (WSAAPI *)(struct addrinfo *))
1041 GetProcAddress(ipv6_dll, "freeaddrinfo");
1042 ipv6_getaddrinfo = (int (WSAAPI *)(const char *, const char *,
1043 const struct addrinfo *,
1044 struct addrinfo **))
1045 GetProcAddress(ipv6_dll, "getaddrinfo");
1046 ipv6_getnameinfo = (int (WSAAPI *)(const struct sockaddr *,
1047 socklen_t, char *, DWORD,
1048 char *, DWORD, int))
1049 GetProcAddress(ipv6_dll, "getnameinfo");
1050 if (!ipv6_freeaddrinfo || !ipv6_getaddrinfo || !ipv6_getnameinfo) {
1051 FreeLibrary(ipv6_dll);
1052 ipv6_dll = NULL;
1053 } else
1054 break;
1055 }
1056 if (!ipv6_freeaddrinfo || !ipv6_getaddrinfo || !ipv6_getnameinfo) {
1057 ipv6_freeaddrinfo = freeaddrinfo_stub;
1058 ipv6_getaddrinfo = getaddrinfo_stub;
1059 ipv6_getnameinfo = getnameinfo_stub;
1060 }
1061
1062 atexit(socket_cleanup);
1063 initialized = 1;
1064 }
1065
1066 #undef gethostbyname
1067 struct hostent *mingw_gethostbyname(const char *host)
1068 {
1069 ensure_socket_initialization();
1070 return gethostbyname(host);
1071 }
1072
1073 void mingw_freeaddrinfo(struct addrinfo *res)
1074 {
1075 ipv6_freeaddrinfo(res);
1076 }
1077
1078 int mingw_getaddrinfo(const char *node, const char *service,
1079 const struct addrinfo *hints, struct addrinfo **res)
1080 {
1081 ensure_socket_initialization();
1082 return ipv6_getaddrinfo(node, service, hints, res);
1083 }
1084
1085 int mingw_getnameinfo(const struct sockaddr *sa, socklen_t salen,
1086 char *host, DWORD hostlen, char *serv, DWORD servlen,
1087 int flags)
1088 {
1089 ensure_socket_initialization();
1090 return ipv6_getnameinfo(sa, salen, host, hostlen, serv, servlen, flags);
1091 }
1092
1093 int mingw_socket(int domain, int type, int protocol)
1094 {
1095 int sockfd;
1096 SOCKET s = WSASocket(domain, type, protocol, NULL, 0, 0);
1097 if (s == INVALID_SOCKET) {
1098 /*
1099 * WSAGetLastError() values are regular BSD error codes
1100 * biased by WSABASEERR.
1101 * However, strerror() does not know about networking
1102 * specific errors, which are values beginning at 38 or so.
1103 * Therefore, we choose to leave the biased error code
1104 * in errno so that _if_ someone looks up the code somewhere,
1105 * then it is at least the number that are usually listed.
1106 */
1107 errno = WSAGetLastError();
1108 return -1;
1109 }
1110 /* convert into a file descriptor */
1111 if ((sockfd = _open_osfhandle(s, O_RDWR|O_BINARY)) < 0) {
1112 closesocket(s);
1113 return error("unable to make a socket file descriptor: %s",
1114 strerror(errno));
1115 }
1116 return sockfd;
1117 }
1118
1119 #undef connect
1120 int mingw_connect(int sockfd, struct sockaddr *sa, size_t sz)
1121 {
1122 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
1123 return connect(s, sa, sz);
1124 }
1125
1126 #undef rename
1127 int mingw_rename(const char *pold, const char *pnew)
1128 {
1129 DWORD attrs, gle;
1130 int tries = 0;
1131 static const int delay[] = { 0, 1, 10, 20, 40 };
1132
1133 /*
1134 * Try native rename() first to get errno right.
1135 * It is based on MoveFile(), which cannot overwrite existing files.
1136 */
1137 if (!rename(pold, pnew))
1138 return 0;
1139 if (errno != EEXIST)
1140 return -1;
1141 repeat:
1142 if (MoveFileEx(pold, pnew, MOVEFILE_REPLACE_EXISTING))
1143 return 0;
1144 /* TODO: translate more errors */
1145 gle = GetLastError();
1146 if (gle == ERROR_ACCESS_DENIED &&
1147 (attrs = GetFileAttributes(pnew)) != INVALID_FILE_ATTRIBUTES) {
1148 if (attrs & FILE_ATTRIBUTE_DIRECTORY) {
1149 errno = EISDIR;
1150 return -1;
1151 }
1152 if ((attrs & FILE_ATTRIBUTE_READONLY) &&
1153 SetFileAttributes(pnew, attrs & ~FILE_ATTRIBUTE_READONLY)) {
1154 if (MoveFileEx(pold, pnew, MOVEFILE_REPLACE_EXISTING))
1155 return 0;
1156 gle = GetLastError();
1157 /* revert file attributes on failure */
1158 SetFileAttributes(pnew, attrs);
1159 }
1160 }
1161 if (tries < ARRAY_SIZE(delay) && gle == ERROR_ACCESS_DENIED) {
1162 /*
1163 * We assume that some other process had the source or
1164 * destination file open at the wrong moment and retry.
1165 * In order to give the other process a higher chance to
1166 * complete its operation, we give up our time slice now.
1167 * If we have to retry again, we do sleep a bit.
1168 */
1169 Sleep(delay[tries]);
1170 tries++;
1171 goto repeat;
1172 }
1173 errno = EACCES;
1174 return -1;
1175 }
1176
1177 /*
1178 * Note that this doesn't return the actual pagesize, but
1179 * the allocation granularity. If future Windows specific git code
1180 * needs the real getpagesize function, we need to find another solution.
1181 */
1182 int mingw_getpagesize(void)
1183 {
1184 SYSTEM_INFO si;
1185 GetSystemInfo(&si);
1186 return si.dwAllocationGranularity;
1187 }
1188
1189 struct passwd *getpwuid(int uid)
1190 {
1191 static char user_name[100];
1192 static struct passwd p;
1193
1194 DWORD len = sizeof(user_name);
1195 if (!GetUserName(user_name, &len))
1196 return NULL;
1197 p.pw_name = user_name;
1198 p.pw_gecos = "unknown";
1199 p.pw_dir = NULL;
1200 return &p;
1201 }
1202
1203 static HANDLE timer_event;
1204 static HANDLE timer_thread;
1205 static int timer_interval;
1206 static int one_shot;
1207 static sig_handler_t timer_fn = SIG_DFL;
1208
1209 /* The timer works like this:
1210 * The thread, ticktack(), is a trivial routine that most of the time
1211 * only waits to receive the signal to terminate. The main thread tells
1212 * the thread to terminate by setting the timer_event to the signalled
1213 * state.
1214 * But ticktack() interrupts the wait state after the timer's interval
1215 * length to call the signal handler.
1216 */
1217
1218 static unsigned __stdcall ticktack(void *dummy)
1219 {
1220 while (WaitForSingleObject(timer_event, timer_interval) == WAIT_TIMEOUT) {
1221 if (timer_fn == SIG_DFL)
1222 die("Alarm");
1223 if (timer_fn != SIG_IGN)
1224 timer_fn(SIGALRM);
1225 if (one_shot)
1226 break;
1227 }
1228 return 0;
1229 }
1230
1231 static int start_timer_thread(void)
1232 {
1233 timer_event = CreateEvent(NULL, FALSE, FALSE, NULL);
1234 if (timer_event) {
1235 timer_thread = (HANDLE) _beginthreadex(NULL, 0, ticktack, NULL, 0, NULL);
1236 if (!timer_thread )
1237 return errno = ENOMEM,
1238 error("cannot start timer thread");
1239 } else
1240 return errno = ENOMEM,
1241 error("cannot allocate resources for timer");
1242 return 0;
1243 }
1244
1245 static void stop_timer_thread(void)
1246 {
1247 if (timer_event)
1248 SetEvent(timer_event); /* tell thread to terminate */
1249 if (timer_thread) {
1250 int rc = WaitForSingleObject(timer_thread, 1000);
1251 if (rc == WAIT_TIMEOUT)
1252 error("timer thread did not terminate timely");
1253 else if (rc != WAIT_OBJECT_0)
1254 error("waiting for timer thread failed: %lu",
1255 GetLastError());
1256 CloseHandle(timer_thread);
1257 }
1258 if (timer_event)
1259 CloseHandle(timer_event);
1260 timer_event = NULL;
1261 timer_thread = NULL;
1262 }
1263
1264 static inline int is_timeval_eq(const struct timeval *i1, const struct timeval *i2)
1265 {
1266 return i1->tv_sec == i2->tv_sec && i1->tv_usec == i2->tv_usec;
1267 }
1268
1269 int setitimer(int type, struct itimerval *in, struct itimerval *out)
1270 {
1271 static const struct timeval zero;
1272 static int atexit_done;
1273
1274 if (out != NULL)
1275 return errno = EINVAL,
1276 error("setitimer param 3 != NULL not implemented");
1277 if (!is_timeval_eq(&in->it_interval, &zero) &&
1278 !is_timeval_eq(&in->it_interval, &in->it_value))
1279 return errno = EINVAL,
1280 error("setitimer: it_interval must be zero or eq it_value");
1281
1282 if (timer_thread)
1283 stop_timer_thread();
1284
1285 if (is_timeval_eq(&in->it_value, &zero) &&
1286 is_timeval_eq(&in->it_interval, &zero))
1287 return 0;
1288
1289 timer_interval = in->it_value.tv_sec * 1000 + in->it_value.tv_usec / 1000;
1290 one_shot = is_timeval_eq(&in->it_interval, &zero);
1291 if (!atexit_done) {
1292 atexit(stop_timer_thread);
1293 atexit_done = 1;
1294 }
1295 return start_timer_thread();
1296 }
1297
1298 int sigaction(int sig, struct sigaction *in, struct sigaction *out)
1299 {
1300 if (sig != SIGALRM)
1301 return errno = EINVAL,
1302 error("sigaction only implemented for SIGALRM");
1303 if (out != NULL)
1304 return errno = EINVAL,
1305 error("sigaction: param 3 != NULL not implemented");
1306
1307 timer_fn = in->sa_handler;
1308 return 0;
1309 }
1310
1311 #undef signal
1312 sig_handler_t mingw_signal(int sig, sig_handler_t handler)
1313 {
1314 sig_handler_t old = timer_fn;
1315 if (sig != SIGALRM)
1316 return signal(sig, handler);
1317 timer_fn = handler;
1318 return old;
1319 }
1320
1321 static const char *make_backslash_path(const char *path)
1322 {
1323 static char buf[PATH_MAX + 1];
1324 char *c;
1325
1326 if (strlcpy(buf, path, PATH_MAX) >= PATH_MAX)
1327 die("Too long path: %.*s", 60, path);
1328
1329 for (c = buf; *c; c++) {
1330 if (*c == '/')
1331 *c = '\\';
1332 }
1333 return buf;
1334 }
1335
1336 void mingw_open_html(const char *unixpath)
1337 {
1338 const char *htmlpath = make_backslash_path(unixpath);
1339 typedef HINSTANCE (WINAPI *T)(HWND, const char *,
1340 const char *, const char *, const char *, INT);
1341 T ShellExecute;
1342 HMODULE shell32;
1343
1344 shell32 = LoadLibrary("shell32.dll");
1345 if (!shell32)
1346 die("cannot load shell32.dll");
1347 ShellExecute = (T)GetProcAddress(shell32, "ShellExecuteA");
1348 if (!ShellExecute)
1349 die("cannot run browser");
1350
1351 printf("Launching default browser to display HTML ...\n");
1352 ShellExecute(NULL, "open", htmlpath, NULL, "\\", 0);
1353
1354 FreeLibrary(shell32);
1355 }
1356
1357 int link(const char *oldpath, const char *newpath)
1358 {
1359 typedef BOOL (WINAPI *T)(const char*, const char*, LPSECURITY_ATTRIBUTES);
1360 static T create_hard_link = NULL;
1361 if (!create_hard_link) {
1362 create_hard_link = (T) GetProcAddress(
1363 GetModuleHandle("kernel32.dll"), "CreateHardLinkA");
1364 if (!create_hard_link)
1365 create_hard_link = (T)-1;
1366 }
1367 if (create_hard_link == (T)-1) {
1368 errno = ENOSYS;
1369 return -1;
1370 }
1371 if (!create_hard_link(newpath, oldpath, NULL)) {
1372 errno = err_win_to_posix(GetLastError());
1373 return -1;
1374 }
1375 return 0;
1376 }
1377
1378 char *getpass(const char *prompt)
1379 {
1380 struct strbuf buf = STRBUF_INIT;
1381
1382 fputs(prompt, stderr);
1383 for (;;) {
1384 char c = _getch();
1385 if (c == '\r' || c == '\n')
1386 break;
1387 strbuf_addch(&buf, c);
1388 }
1389 fputs("\n", stderr);
1390 return strbuf_detach(&buf, NULL);
1391 }
1392
1393 #ifndef NO_MINGW_REPLACE_READDIR
1394 /* MinGW readdir implementation to avoid extra lstats for Git */
1395 struct mingw_DIR
1396 {
1397 struct _finddata_t dd_dta; /* disk transfer area for this dir */
1398 struct mingw_dirent dd_dir; /* Our own implementation, including d_type */
1399 long dd_handle; /* _findnext handle */
1400 int dd_stat; /* 0 = next entry to read is first entry, -1 = off the end, positive = 0 based index of next entry */
1401 char dd_name[1]; /* given path for dir with search pattern (struct is extended) */
1402 };
1403
1404 struct dirent *mingw_readdir(DIR *dir)
1405 {
1406 WIN32_FIND_DATAA buf;
1407 HANDLE handle;
1408 struct mingw_DIR *mdir = (struct mingw_DIR*)dir;
1409
1410 if (!dir->dd_handle) {
1411 errno = EBADF; /* No set_errno for mingw */
1412 return NULL;
1413 }
1414
1415 if (dir->dd_handle == (long)INVALID_HANDLE_VALUE && dir->dd_stat == 0)
1416 {
1417 DWORD lasterr;
1418 handle = FindFirstFileA(dir->dd_name, &buf);
1419 lasterr = GetLastError();
1420 dir->dd_handle = (long)handle;
1421 if (handle == INVALID_HANDLE_VALUE && (lasterr != ERROR_NO_MORE_FILES)) {
1422 errno = err_win_to_posix(lasterr);
1423 return NULL;
1424 }
1425 } else if (dir->dd_handle == (long)INVALID_HANDLE_VALUE) {
1426 return NULL;
1427 } else if (!FindNextFileA((HANDLE)dir->dd_handle, &buf)) {
1428 DWORD lasterr = GetLastError();
1429 FindClose((HANDLE)dir->dd_handle);
1430 dir->dd_handle = (long)INVALID_HANDLE_VALUE;
1431 /* POSIX says you shouldn't set errno when readdir can't
1432 find any more files; so, if another error we leave it set. */
1433 if (lasterr != ERROR_NO_MORE_FILES)
1434 errno = err_win_to_posix(lasterr);
1435 return NULL;
1436 }
1437
1438 /* We get here if `buf' contains valid data. */
1439 strcpy(dir->dd_dir.d_name, buf.cFileName);
1440 ++dir->dd_stat;
1441
1442 /* Set file type, based on WIN32_FIND_DATA */
1443 mdir->dd_dir.d_type = 0;
1444 if (buf.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)
1445 mdir->dd_dir.d_type |= DT_DIR;
1446 else
1447 mdir->dd_dir.d_type |= DT_REG;
1448
1449 return (struct dirent*)&dir->dd_dir;
1450 }
1451 #endif // !NO_MINGW_REPLACE_READDIR