e8e20282df81b234171dbef9504eae9d369067ac
1 #include "../git-compat-util.h"
2 #include "win32.h"
3 #include <conio.h>
4 #include "../strbuf.h"
5 #include "../run-command.h"
7 static const int delay[] = { 0, 1, 10, 20, 40 };
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 }
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 }
130 return 0;
131 }
133 static int read_yes_no_answer(void)
134 {
135 char answer[1024];
137 if (fgets(answer, sizeof(answer), stdin)) {
138 size_t answer_len = strlen(answer);
139 int got_full_line = 0, c;
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;
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;
167 /* did not find an answer we understand */
168 return -1;
169 }
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;
177 va_start(args, format);
178 vsnprintf(question, sizeof(question), format, args);
179 va_end(args);
181 if ((retry_hook[0] = getenv("GIT_ASK_YESNO"))) {
182 retry_hook[1] = question;
183 return !run_command_v_opt(retry_hook, 0);
184 }
186 if (!isatty(_fileno(stdin)) || !isatty(_fileno(stderr)))
187 return 0;
189 while (1) {
190 int answer;
191 fprintf(stderr, "%s (y/n) ", question);
193 if ((answer = read_yes_no_answer()) >= 0)
194 return answer;
196 fprintf(stderr, "Sorry, I did not understand your answer. "
197 "Please type 'y' or 'n'\n");
198 }
199 }
201 #undef unlink
202 int mingw_unlink(const char *pathname)
203 {
204 int ret, tries = 0;
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 }
228 #undef open
229 int mingw_open (const char *filename, int oflags, ...)
230 {
231 va_list args;
232 unsigned mode;
233 int fd;
235 va_start(args, oflags);
236 mode = va_arg(args, int);
237 va_end(args);
239 if (filename && !strcmp(filename, "/dev/null"))
240 filename = "nul";
242 fd = open(filename, oflags, mode);
244 if (fd < 0 && (oflags & O_CREAT) && errno == EACCES) {
245 DWORD attrs = GetFileAttributes(filename);
246 if (attrs != INVALID_FILE_ATTRIBUTES && (attrs & FILE_ATTRIBUTE_DIRECTORY))
247 errno = EISDIR;
248 }
249 return fd;
250 }
252 #undef write
253 ssize_t mingw_write(int fd, const void *buf, size_t count)
254 {
255 /*
256 * While write() calls to a file on a local disk are translated
257 * into WriteFile() calls with a maximum size of 64KB on Windows
258 * XP and 256KB on Vista, no such cap is placed on writes to
259 * files over the network on Windows XP. Unfortunately, there
260 * seems to be a limit of 32MB-28KB on X64 and 64MB-32KB on x86;
261 * bigger writes fail on Windows XP.
262 * So we cap to a nice 31MB here to avoid write failures over
263 * the net without changing the number of WriteFile() calls in
264 * the local case.
265 */
266 return write(fd, buf, min(count, 31 * 1024 * 1024));
267 }
269 #undef fopen
270 FILE *mingw_fopen (const char *filename, const char *otype)
271 {
272 if (filename && !strcmp(filename, "/dev/null"))
273 filename = "nul";
274 return fopen(filename, otype);
275 }
277 #undef freopen
278 FILE *mingw_freopen (const char *filename, const char *otype, FILE *stream)
279 {
280 if (filename && !strcmp(filename, "/dev/null"))
281 filename = "nul";
282 return freopen(filename, otype, stream);
283 }
285 /*
286 * The unit of FILETIME is 100-nanoseconds since January 1, 1601, UTC.
287 * Returns the 100-nanoseconds ("hekto nanoseconds") since the epoch.
288 */
289 static inline long long filetime_to_hnsec(const FILETIME *ft)
290 {
291 long long winTime = ((long long)ft->dwHighDateTime << 32) + ft->dwLowDateTime;
292 /* Windows to Unix Epoch conversion */
293 return winTime - 116444736000000000LL;
294 }
296 static inline time_t filetime_to_time_t(const FILETIME *ft)
297 {
298 return (time_t)(filetime_to_hnsec(ft) / 10000000);
299 }
301 /* We keep the do_lstat code in a separate function to avoid recursion.
302 * When a path ends with a slash, the stat will fail with ENOENT. In
303 * this case, we strip the trailing slashes and stat again.
304 *
305 * If follow is true then act like stat() and report on the link
306 * target. Otherwise report on the link itself.
307 */
308 static int do_lstat(int follow, const char *file_name, struct stat *buf)
309 {
310 int err;
311 WIN32_FILE_ATTRIBUTE_DATA fdata;
313 if (!(err = get_file_attr(file_name, &fdata))) {
314 buf->st_ino = 0;
315 buf->st_gid = 0;
316 buf->st_uid = 0;
317 buf->st_nlink = 1;
318 buf->st_mode = file_attr_to_st_mode(fdata.dwFileAttributes);
319 buf->st_size = fdata.nFileSizeLow |
320 (((off_t)fdata.nFileSizeHigh)<<32);
321 buf->st_dev = buf->st_rdev = 0; /* not used by Git */
322 buf->st_atime = filetime_to_time_t(&(fdata.ftLastAccessTime));
323 buf->st_mtime = filetime_to_time_t(&(fdata.ftLastWriteTime));
324 buf->st_ctime = filetime_to_time_t(&(fdata.ftCreationTime));
325 if (fdata.dwFileAttributes & FILE_ATTRIBUTE_REPARSE_POINT) {
326 WIN32_FIND_DATAA findbuf;
327 HANDLE handle = FindFirstFileA(file_name, &findbuf);
328 if (handle != INVALID_HANDLE_VALUE) {
329 if ((findbuf.dwFileAttributes & FILE_ATTRIBUTE_REPARSE_POINT) &&
330 (findbuf.dwReserved0 == IO_REPARSE_TAG_SYMLINK)) {
331 if (follow) {
332 char buffer[MAXIMUM_REPARSE_DATA_BUFFER_SIZE];
333 buf->st_size = readlink(file_name, buffer, MAXIMUM_REPARSE_DATA_BUFFER_SIZE);
334 } else {
335 buf->st_mode = S_IFLNK;
336 }
337 buf->st_mode |= S_IREAD;
338 if (!(findbuf.dwFileAttributes & FILE_ATTRIBUTE_READONLY))
339 buf->st_mode |= S_IWRITE;
340 }
341 FindClose(handle);
342 }
343 }
344 return 0;
345 }
346 errno = err;
347 return -1;
348 }
350 /* We provide our own lstat/fstat functions, since the provided
351 * lstat/fstat functions are so slow. These stat functions are
352 * tailored for Git's usage (read: fast), and are not meant to be
353 * complete. Note that Git stat()s are redirected to mingw_lstat()
354 * too, since Windows doesn't really handle symlinks that well.
355 */
356 static int do_stat_internal(int follow, const char *file_name, struct stat *buf)
357 {
358 int namelen;
359 static char alt_name[PATH_MAX];
361 if (!do_lstat(follow, file_name, buf))
362 return 0;
364 /* if file_name ended in a '/', Windows returned ENOENT;
365 * try again without trailing slashes
366 */
367 if (errno != ENOENT)
368 return -1;
370 namelen = strlen(file_name);
371 if (namelen && file_name[namelen-1] != '/')
372 return -1;
373 while (namelen && file_name[namelen-1] == '/')
374 --namelen;
375 if (!namelen || namelen >= PATH_MAX)
376 return -1;
378 memcpy(alt_name, file_name, namelen);
379 alt_name[namelen] = 0;
380 return do_lstat(follow, alt_name, buf);
381 }
383 int mingw_lstat(const char *file_name, struct stat *buf)
384 {
385 return do_stat_internal(0, file_name, buf);
386 }
387 int mingw_stat(const char *file_name, struct stat *buf)
388 {
389 return do_stat_internal(1, file_name, buf);
390 }
392 #undef fstat
393 int mingw_fstat(int fd, struct stat *buf)
394 {
395 HANDLE fh = (HANDLE)_get_osfhandle(fd);
396 BY_HANDLE_FILE_INFORMATION fdata;
398 if (fh == INVALID_HANDLE_VALUE) {
399 errno = EBADF;
400 return -1;
401 }
402 /* direct non-file handles to MS's fstat() */
403 if (GetFileType(fh) != FILE_TYPE_DISK)
404 return _fstati64(fd, buf);
406 if (GetFileInformationByHandle(fh, &fdata)) {
407 buf->st_ino = 0;
408 buf->st_gid = 0;
409 buf->st_uid = 0;
410 buf->st_nlink = 1;
411 buf->st_mode = file_attr_to_st_mode(fdata.dwFileAttributes);
412 buf->st_size = fdata.nFileSizeLow |
413 (((off_t)fdata.nFileSizeHigh)<<32);
414 buf->st_dev = buf->st_rdev = 0; /* not used by Git */
415 buf->st_atime = filetime_to_time_t(&(fdata.ftLastAccessTime));
416 buf->st_mtime = filetime_to_time_t(&(fdata.ftLastWriteTime));
417 buf->st_ctime = filetime_to_time_t(&(fdata.ftCreationTime));
418 return 0;
419 }
420 errno = EBADF;
421 return -1;
422 }
424 static inline void time_t_to_filetime(time_t t, FILETIME *ft)
425 {
426 long long winTime = t * 10000000LL + 116444736000000000LL;
427 ft->dwLowDateTime = winTime;
428 ft->dwHighDateTime = winTime >> 32;
429 }
431 int mingw_utime (const char *file_name, const struct utimbuf *times)
432 {
433 FILETIME mft, aft;
434 int fh, rc;
436 /* must have write permission */
437 DWORD attrs = GetFileAttributes(file_name);
438 if (attrs != INVALID_FILE_ATTRIBUTES &&
439 (attrs & FILE_ATTRIBUTE_READONLY)) {
440 /* ignore errors here; open() will report them */
441 SetFileAttributes(file_name, attrs & ~FILE_ATTRIBUTE_READONLY);
442 }
444 if ((fh = open(file_name, O_RDWR | O_BINARY)) < 0) {
445 rc = -1;
446 goto revert_attrs;
447 }
449 if (times) {
450 time_t_to_filetime(times->modtime, &mft);
451 time_t_to_filetime(times->actime, &aft);
452 } else {
453 GetSystemTimeAsFileTime(&mft);
454 aft = mft;
455 }
456 if (!SetFileTime((HANDLE)_get_osfhandle(fh), NULL, &aft, &mft)) {
457 errno = EINVAL;
458 rc = -1;
459 } else
460 rc = 0;
461 close(fh);
463 revert_attrs:
464 if (attrs != INVALID_FILE_ATTRIBUTES &&
465 (attrs & FILE_ATTRIBUTE_READONLY)) {
466 /* ignore errors again */
467 SetFileAttributes(file_name, attrs);
468 }
469 return rc;
470 }
472 unsigned int sleep (unsigned int seconds)
473 {
474 Sleep(seconds*1000);
475 return 0;
476 }
478 int mkstemp(char *template)
479 {
480 char *filename = mktemp(template);
481 if (filename == NULL)
482 return -1;
483 return open(filename, O_RDWR | O_CREAT, 0600);
484 }
486 int gettimeofday(struct timeval *tv, void *tz)
487 {
488 FILETIME ft;
489 long long hnsec;
491 GetSystemTimeAsFileTime(&ft);
492 hnsec = filetime_to_hnsec(&ft);
493 tv->tv_sec = hnsec / 10000000;
494 tv->tv_usec = (hnsec % 10000000) / 10;
495 return 0;
496 }
498 int pipe(int filedes[2])
499 {
500 HANDLE h[2];
502 /* this creates non-inheritable handles */
503 if (!CreatePipe(&h[0], &h[1], NULL, 8192)) {
504 errno = err_win_to_posix(GetLastError());
505 return -1;
506 }
507 filedes[0] = _open_osfhandle((int)h[0], O_NOINHERIT);
508 if (filedes[0] < 0) {
509 CloseHandle(h[0]);
510 CloseHandle(h[1]);
511 return -1;
512 }
513 filedes[1] = _open_osfhandle((int)h[1], O_NOINHERIT);
514 if (filedes[0] < 0) {
515 close(filedes[0]);
516 CloseHandle(h[1]);
517 return -1;
518 }
519 return 0;
520 }
522 struct tm *gmtime_r(const time_t *timep, struct tm *result)
523 {
524 /* gmtime() in MSVCRT.DLL is thread-safe, but not reentrant */
525 memcpy(result, gmtime(timep), sizeof(struct tm));
526 return result;
527 }
529 struct tm *localtime_r(const time_t *timep, struct tm *result)
530 {
531 /* localtime() in MSVCRT.DLL is thread-safe, but not reentrant */
532 memcpy(result, localtime(timep), sizeof(struct tm));
533 return result;
534 }
536 #undef getcwd
537 char *mingw_getcwd(char *pointer, int len)
538 {
539 int i;
540 char *ret = getcwd(pointer, len);
541 if (!ret)
542 return ret;
543 for (i = 0; pointer[i]; i++)
544 if (pointer[i] == '\\')
545 pointer[i] = '/';
546 return ret;
547 }
549 #undef getenv
550 char *mingw_getenv(const char *name)
551 {
552 char *result = getenv(name);
553 if (!result && !strcmp(name, "TMPDIR")) {
554 /* on Windows it is TMP and TEMP */
555 result = getenv("TMP");
556 if (!result)
557 result = getenv("TEMP");
558 }
559 return result;
560 }
562 /*
563 * See http://msdn2.microsoft.com/en-us/library/17w5ykft(vs.71).aspx
564 * (Parsing C++ Command-Line Arguments)
565 */
566 static const char *quote_arg(const char *arg)
567 {
568 /* count chars to quote */
569 int len = 0, n = 0;
570 int force_quotes = 0;
571 char *q, *d;
572 const char *p = arg;
573 if (!*p) force_quotes = 1;
574 while (*p) {
575 if (isspace(*p) || *p == '*' || *p == '?' || *p == '{' || *p == '\'')
576 force_quotes = 1;
577 else if (*p == '"')
578 n++;
579 else if (*p == '\\') {
580 int count = 0;
581 while (*p == '\\') {
582 count++;
583 p++;
584 len++;
585 }
586 if (*p == '"')
587 n += count*2 + 1;
588 continue;
589 }
590 len++;
591 p++;
592 }
593 if (!force_quotes && n == 0)
594 return arg;
596 /* insert \ where necessary */
597 d = q = xmalloc(len+n+3);
598 *d++ = '"';
599 while (*arg) {
600 if (*arg == '"')
601 *d++ = '\\';
602 else if (*arg == '\\') {
603 int count = 0;
604 while (*arg == '\\') {
605 count++;
606 *d++ = *arg++;
607 }
608 if (*arg == '"') {
609 while (count-- > 0)
610 *d++ = '\\';
611 *d++ = '\\';
612 }
613 }
614 *d++ = *arg++;
615 }
616 *d++ = '"';
617 *d++ = 0;
618 return q;
619 }
621 static const char *parse_interpreter(const char *cmd)
622 {
623 static char buf[100];
624 char *p, *opt;
625 int n, fd;
627 /* don't even try a .exe */
628 n = strlen(cmd);
629 if (n >= 4 && !strcasecmp(cmd+n-4, ".exe"))
630 return NULL;
632 fd = open(cmd, O_RDONLY);
633 if (fd < 0)
634 return NULL;
635 n = read(fd, buf, sizeof(buf)-1);
636 close(fd);
637 if (n < 4) /* at least '#!/x' and not error */
638 return NULL;
640 if (buf[0] != '#' || buf[1] != '!')
641 return NULL;
642 buf[n] = '\0';
643 p = buf + strcspn(buf, "\r\n");
644 if (!*p)
645 return NULL;
647 *p = '\0';
648 if (!(p = strrchr(buf+2, '/')) && !(p = strrchr(buf+2, '\\')))
649 return NULL;
650 /* strip options */
651 if ((opt = strchr(p+1, ' ')))
652 *opt = '\0';
653 return p+1;
654 }
656 /*
657 * Splits the PATH into parts.
658 */
659 static char **get_path_split(void)
660 {
661 char *p, **path, *envpath = getenv("PATH");
662 int i, n = 0;
664 if (!envpath || !*envpath)
665 return NULL;
667 envpath = xstrdup(envpath);
668 p = envpath;
669 while (p) {
670 char *dir = p;
671 p = strchr(p, ';');
672 if (p) *p++ = '\0';
673 if (*dir) { /* not earlier, catches series of ; */
674 ++n;
675 }
676 }
677 if (!n)
678 return NULL;
680 path = xmalloc((n+1)*sizeof(char *));
681 p = envpath;
682 i = 0;
683 do {
684 if (*p)
685 path[i++] = xstrdup(p);
686 p = p+strlen(p)+1;
687 } while (i < n);
688 path[i] = NULL;
690 free(envpath);
692 return path;
693 }
695 static void free_path_split(char **path)
696 {
697 char **p = path;
699 if (!path)
700 return;
702 while (*p)
703 free(*p++);
704 free(path);
705 }
707 /*
708 * exe_only means that we only want to detect .exe files, but not scripts
709 * (which do not have an extension)
710 */
711 static char *lookup_prog(const char *dir, const char *cmd, int isexe, int exe_only)
712 {
713 char path[MAX_PATH];
714 snprintf(path, sizeof(path), "%s/%s.exe", dir, cmd);
716 if (!isexe && access(path, F_OK) == 0)
717 return xstrdup(path);
718 path[strlen(path)-4] = '\0';
719 if ((!exe_only || isexe) && access(path, F_OK) == 0)
720 if (!(GetFileAttributes(path) & FILE_ATTRIBUTE_DIRECTORY))
721 return xstrdup(path);
722 return NULL;
723 }
725 /*
726 * Determines the absolute path of cmd using the split path in path.
727 * If cmd contains a slash or backslash, no lookup is performed.
728 */
729 static char *path_lookup(const char *cmd, char **path, int exe_only)
730 {
731 char *prog = NULL;
732 int len = strlen(cmd);
733 int isexe = len >= 4 && !strcasecmp(cmd+len-4, ".exe");
735 if (strchr(cmd, '/') || strchr(cmd, '\\'))
736 prog = xstrdup(cmd);
738 while (!prog && *path)
739 prog = lookup_prog(*path++, cmd, isexe, exe_only);
741 return prog;
742 }
744 static int env_compare(const void *a, const void *b)
745 {
746 char *const *ea = a;
747 char *const *eb = b;
748 return strcasecmp(*ea, *eb);
749 }
751 struct pinfo_t {
752 struct pinfo_t *next;
753 pid_t pid;
754 HANDLE proc;
755 } pinfo_t;
756 struct pinfo_t *pinfo = NULL;
757 CRITICAL_SECTION pinfo_cs;
759 static pid_t mingw_spawnve_fd(const char *cmd, const char **argv, char **env,
760 const char *dir,
761 int prepend_cmd, int fhin, int fhout, int fherr)
762 {
763 STARTUPINFO si;
764 PROCESS_INFORMATION pi;
765 struct strbuf envblk, args;
766 unsigned flags;
767 BOOL ret;
769 /* Determine whether or not we are associated to a console */
770 HANDLE cons = CreateFile("CONOUT$", GENERIC_WRITE,
771 FILE_SHARE_WRITE, NULL, OPEN_EXISTING,
772 FILE_ATTRIBUTE_NORMAL, NULL);
773 if (cons == INVALID_HANDLE_VALUE) {
774 /* There is no console associated with this process.
775 * Since the child is a console process, Windows
776 * would normally create a console window. But
777 * since we'll be redirecting std streams, we do
778 * not need the console.
779 * It is necessary to use DETACHED_PROCESS
780 * instead of CREATE_NO_WINDOW to make ssh
781 * recognize that it has no console.
782 */
783 flags = DETACHED_PROCESS;
784 } else {
785 /* There is already a console. If we specified
786 * DETACHED_PROCESS here, too, Windows would
787 * disassociate the child from the console.
788 * The same is true for CREATE_NO_WINDOW.
789 * Go figure!
790 */
791 flags = 0;
792 CloseHandle(cons);
793 }
794 memset(&si, 0, sizeof(si));
795 si.cb = sizeof(si);
796 si.dwFlags = STARTF_USESTDHANDLES;
797 si.hStdInput = (HANDLE) _get_osfhandle(fhin);
798 si.hStdOutput = (HANDLE) _get_osfhandle(fhout);
799 si.hStdError = (HANDLE) _get_osfhandle(fherr);
801 /* concatenate argv, quoting args as we go */
802 strbuf_init(&args, 0);
803 if (prepend_cmd) {
804 char *quoted = (char *)quote_arg(cmd);
805 strbuf_addstr(&args, quoted);
806 if (quoted != cmd)
807 free(quoted);
808 }
809 for (; *argv; argv++) {
810 char *quoted = (char *)quote_arg(*argv);
811 if (*args.buf)
812 strbuf_addch(&args, ' ');
813 strbuf_addstr(&args, quoted);
814 if (quoted != *argv)
815 free(quoted);
816 }
818 if (env) {
819 int count = 0;
820 char **e, **sorted_env;
822 for (e = env; *e; e++)
823 count++;
825 /* environment must be sorted */
826 sorted_env = xmalloc(sizeof(*sorted_env) * (count + 1));
827 memcpy(sorted_env, env, sizeof(*sorted_env) * (count + 1));
828 qsort(sorted_env, count, sizeof(*sorted_env), env_compare);
830 strbuf_init(&envblk, 0);
831 for (e = sorted_env; *e; e++) {
832 strbuf_addstr(&envblk, *e);
833 strbuf_addch(&envblk, '\0');
834 }
835 free(sorted_env);
836 }
838 memset(&pi, 0, sizeof(pi));
839 ret = CreateProcess(cmd, args.buf, NULL, NULL, TRUE, flags,
840 env ? envblk.buf : NULL, dir, &si, &pi);
842 if (env)
843 strbuf_release(&envblk);
844 strbuf_release(&args);
846 if (!ret) {
847 errno = ENOENT;
848 return -1;
849 }
850 CloseHandle(pi.hThread);
852 /*
853 * The process ID is the human-readable identifier of the process
854 * that we want to present in log and error messages. The handle
855 * is not useful for this purpose. But we cannot close it, either,
856 * because it is not possible to turn a process ID into a process
857 * handle after the process terminated.
858 * Keep the handle in a list for waitpid.
859 */
860 EnterCriticalSection(&pinfo_cs);
861 {
862 struct pinfo_t *info = xmalloc(sizeof(struct pinfo_t));
863 info->pid = pi.dwProcessId;
864 info->proc = pi.hProcess;
865 info->next = pinfo;
866 pinfo = info;
867 }
868 LeaveCriticalSection(&pinfo_cs);
870 return (pid_t)pi.dwProcessId;
871 }
873 static pid_t mingw_spawnve(const char *cmd, const char **argv, char **env,
874 int prepend_cmd)
875 {
876 return mingw_spawnve_fd(cmd, argv, env, NULL, prepend_cmd, 0, 1, 2);
877 }
879 pid_t mingw_spawnvpe(const char *cmd, const char **argv, char **env,
880 const char *dir,
881 int fhin, int fhout, int fherr)
882 {
883 pid_t pid;
884 char **path = get_path_split();
885 char *prog = path_lookup(cmd, path, 0);
887 if (!prog) {
888 errno = ENOENT;
889 pid = -1;
890 }
891 else {
892 const char *interpr = parse_interpreter(prog);
894 if (interpr) {
895 const char *argv0 = argv[0];
896 char *iprog = path_lookup(interpr, path, 1);
897 argv[0] = prog;
898 if (!iprog) {
899 errno = ENOENT;
900 pid = -1;
901 }
902 else {
903 pid = mingw_spawnve_fd(iprog, argv, env, dir, 1,
904 fhin, fhout, fherr);
905 free(iprog);
906 }
907 argv[0] = argv0;
908 }
909 else
910 pid = mingw_spawnve_fd(prog, argv, env, dir, 0,
911 fhin, fhout, fherr);
912 free(prog);
913 }
914 free_path_split(path);
915 return pid;
916 }
918 static int try_shell_exec(const char *cmd, char *const *argv, char **env)
919 {
920 const char *interpr = parse_interpreter(cmd);
921 char **path;
922 char *prog;
923 int pid = 0;
925 if (!interpr)
926 return 0;
927 path = get_path_split();
928 prog = path_lookup(interpr, path, 1);
929 if (prog) {
930 int argc = 0;
931 const char **argv2;
932 while (argv[argc]) argc++;
933 argv2 = xmalloc(sizeof(*argv) * (argc+1));
934 argv2[0] = (char *)cmd; /* full path to the script file */
935 memcpy(&argv2[1], &argv[1], sizeof(*argv) * argc);
936 pid = mingw_spawnve(prog, argv2, env, 1);
937 if (pid >= 0) {
938 int status;
939 if (waitpid(pid, &status, 0) < 0)
940 status = 255;
941 exit(status);
942 }
943 pid = 1; /* indicate that we tried but failed */
944 free(prog);
945 free(argv2);
946 }
947 free_path_split(path);
948 return pid;
949 }
951 static void mingw_execve(const char *cmd, char *const *argv, char *const *env)
952 {
953 /* check if git_command is a shell script */
954 if (!try_shell_exec(cmd, argv, (char **)env)) {
955 int pid, status;
957 pid = mingw_spawnve(cmd, (const char **)argv, (char **)env, 0);
958 if (pid < 0)
959 return;
960 if (waitpid(pid, &status, 0) < 0)
961 status = 255;
962 exit(status);
963 }
964 }
966 void mingw_execvp(const char *cmd, char *const *argv)
967 {
968 char **path = get_path_split();
969 char *prog = path_lookup(cmd, path, 0);
971 if (prog) {
972 mingw_execve(prog, argv, environ);
973 free(prog);
974 } else
975 errno = ENOENT;
977 free_path_split(path);
978 }
980 void mingw_execv(const char *cmd, char *const *argv)
981 {
982 mingw_execve(cmd, argv, environ);
983 }
985 int mingw_kill(pid_t pid, int sig)
986 {
987 if (pid > 0 && sig == SIGTERM) {
988 HANDLE h = OpenProcess(PROCESS_TERMINATE, FALSE, pid);
990 if (TerminateProcess(h, -1)) {
991 CloseHandle(h);
992 return 0;
993 }
995 errno = err_win_to_posix(GetLastError());
996 CloseHandle(h);
997 return -1;
998 }
1000 errno = EINVAL;
1001 return -1;
1002 }
1004 static char **copy_environ(void)
1005 {
1006 char **env;
1007 int i = 0;
1008 while (environ[i])
1009 i++;
1010 env = xmalloc((i+1)*sizeof(*env));
1011 for (i = 0; environ[i]; i++)
1012 env[i] = xstrdup(environ[i]);
1013 env[i] = NULL;
1014 return env;
1015 }
1017 void free_environ(char **env)
1018 {
1019 int i;
1020 for (i = 0; env[i]; i++)
1021 free(env[i]);
1022 free(env);
1023 }
1025 static int lookup_env(char **env, const char *name, size_t nmln)
1026 {
1027 int i;
1029 for (i = 0; env[i]; i++) {
1030 if (0 == strncmp(env[i], name, nmln)
1031 && '=' == env[i][nmln])
1032 /* matches */
1033 return i;
1034 }
1035 return -1;
1036 }
1038 /*
1039 * If name contains '=', then sets the variable, otherwise it unsets it
1040 */
1041 static char **env_setenv(char **env, const char *name)
1042 {
1043 char *eq = strchrnul(name, '=');
1044 int i = lookup_env(env, name, eq-name);
1046 if (i < 0) {
1047 if (*eq) {
1048 for (i = 0; env[i]; i++)
1049 ;
1050 env = xrealloc(env, (i+2)*sizeof(*env));
1051 env[i] = xstrdup(name);
1052 env[i+1] = NULL;
1053 }
1054 }
1055 else {
1056 free(env[i]);
1057 if (*eq)
1058 env[i] = xstrdup(name);
1059 else
1060 for (; env[i]; i++)
1061 env[i] = env[i+1];
1062 }
1063 return env;
1064 }
1066 /*
1067 * Copies global environ and adjusts variables as specified by vars.
1068 */
1069 char **make_augmented_environ(const char *const *vars)
1070 {
1071 char **env = copy_environ();
1073 while (*vars)
1074 env = env_setenv(env, *vars++);
1075 return env;
1076 }
1078 /*
1079 * Note, this isn't a complete replacement for getaddrinfo. It assumes
1080 * that service contains a numerical port, or that it it is null. It
1081 * does a simple search using gethostbyname, and returns one IPv4 host
1082 * if one was found.
1083 */
1084 static int WSAAPI getaddrinfo_stub(const char *node, const char *service,
1085 const struct addrinfo *hints,
1086 struct addrinfo **res)
1087 {
1088 struct hostent *h = NULL;
1089 struct addrinfo *ai;
1090 struct sockaddr_in *sin;
1092 if (node) {
1093 h = gethostbyname(node);
1094 if (!h)
1095 return WSAGetLastError();
1096 }
1098 ai = xmalloc(sizeof(struct addrinfo));
1099 *res = ai;
1100 ai->ai_flags = 0;
1101 ai->ai_family = AF_INET;
1102 ai->ai_socktype = hints ? hints->ai_socktype : 0;
1103 switch (ai->ai_socktype) {
1104 case SOCK_STREAM:
1105 ai->ai_protocol = IPPROTO_TCP;
1106 break;
1107 case SOCK_DGRAM:
1108 ai->ai_protocol = IPPROTO_UDP;
1109 break;
1110 default:
1111 ai->ai_protocol = 0;
1112 break;
1113 }
1114 ai->ai_addrlen = sizeof(struct sockaddr_in);
1115 if (hints && (hints->ai_flags & AI_CANONNAME))
1116 ai->ai_canonname = h ? strdup(h->h_name) : NULL;
1117 else
1118 ai->ai_canonname = NULL;
1120 sin = xmalloc(ai->ai_addrlen);
1121 memset(sin, 0, ai->ai_addrlen);
1122 sin->sin_family = AF_INET;
1123 /* Note: getaddrinfo is supposed to allow service to be a string,
1124 * which should be looked up using getservbyname. This is
1125 * currently not implemented */
1126 if (service)
1127 sin->sin_port = htons(atoi(service));
1128 if (h)
1129 sin->sin_addr = *(struct in_addr *)h->h_addr;
1130 else if (hints && (hints->ai_flags & AI_PASSIVE))
1131 sin->sin_addr.s_addr = INADDR_ANY;
1132 else
1133 sin->sin_addr.s_addr = INADDR_LOOPBACK;
1134 ai->ai_addr = (struct sockaddr *)sin;
1135 ai->ai_next = 0;
1136 return 0;
1137 }
1139 static void WSAAPI freeaddrinfo_stub(struct addrinfo *res)
1140 {
1141 free(res->ai_canonname);
1142 free(res->ai_addr);
1143 free(res);
1144 }
1146 static int WSAAPI getnameinfo_stub(const struct sockaddr *sa, socklen_t salen,
1147 char *host, DWORD hostlen,
1148 char *serv, DWORD servlen, int flags)
1149 {
1150 const struct sockaddr_in *sin = (const struct sockaddr_in *)sa;
1151 if (sa->sa_family != AF_INET)
1152 return EAI_FAMILY;
1153 if (!host && !serv)
1154 return EAI_NONAME;
1156 if (host && hostlen > 0) {
1157 struct hostent *ent = NULL;
1158 if (!(flags & NI_NUMERICHOST))
1159 ent = gethostbyaddr((const char *)&sin->sin_addr,
1160 sizeof(sin->sin_addr), AF_INET);
1162 if (ent)
1163 snprintf(host, hostlen, "%s", ent->h_name);
1164 else if (flags & NI_NAMEREQD)
1165 return EAI_NONAME;
1166 else
1167 snprintf(host, hostlen, "%s", inet_ntoa(sin->sin_addr));
1168 }
1170 if (serv && servlen > 0) {
1171 struct servent *ent = NULL;
1172 if (!(flags & NI_NUMERICSERV))
1173 ent = getservbyport(sin->sin_port,
1174 flags & NI_DGRAM ? "udp" : "tcp");
1176 if (ent)
1177 snprintf(serv, servlen, "%s", ent->s_name);
1178 else
1179 snprintf(serv, servlen, "%d", ntohs(sin->sin_port));
1180 }
1182 return 0;
1183 }
1185 static HMODULE ipv6_dll = NULL;
1186 static void (WSAAPI *ipv6_freeaddrinfo)(struct addrinfo *res);
1187 static int (WSAAPI *ipv6_getaddrinfo)(const char *node, const char *service,
1188 const struct addrinfo *hints,
1189 struct addrinfo **res);
1190 static int (WSAAPI *ipv6_getnameinfo)(const struct sockaddr *sa, socklen_t salen,
1191 char *host, DWORD hostlen,
1192 char *serv, DWORD servlen, int flags);
1193 /*
1194 * gai_strerror is an inline function in the ws2tcpip.h header, so we
1195 * don't need to try to load that one dynamically.
1196 */
1198 static void socket_cleanup(void)
1199 {
1200 WSACleanup();
1201 if (ipv6_dll)
1202 FreeLibrary(ipv6_dll);
1203 ipv6_dll = NULL;
1204 ipv6_freeaddrinfo = freeaddrinfo_stub;
1205 ipv6_getaddrinfo = getaddrinfo_stub;
1206 ipv6_getnameinfo = getnameinfo_stub;
1207 }
1209 static void ensure_socket_initialization(void)
1210 {
1211 WSADATA wsa;
1212 static int initialized = 0;
1213 const char *libraries[] = { "ws2_32.dll", "wship6.dll", NULL };
1214 const char **name;
1216 if (initialized)
1217 return;
1219 if (WSAStartup(MAKEWORD(2,2), &wsa))
1220 die("unable to initialize winsock subsystem, error %d",
1221 WSAGetLastError());
1223 for (name = libraries; *name; name++) {
1224 ipv6_dll = LoadLibrary(*name);
1225 if (!ipv6_dll)
1226 continue;
1228 ipv6_freeaddrinfo = (void (WSAAPI *)(struct addrinfo *))
1229 GetProcAddress(ipv6_dll, "freeaddrinfo");
1230 ipv6_getaddrinfo = (int (WSAAPI *)(const char *, const char *,
1231 const struct addrinfo *,
1232 struct addrinfo **))
1233 GetProcAddress(ipv6_dll, "getaddrinfo");
1234 ipv6_getnameinfo = (int (WSAAPI *)(const struct sockaddr *,
1235 socklen_t, char *, DWORD,
1236 char *, DWORD, int))
1237 GetProcAddress(ipv6_dll, "getnameinfo");
1238 if (!ipv6_freeaddrinfo || !ipv6_getaddrinfo || !ipv6_getnameinfo) {
1239 FreeLibrary(ipv6_dll);
1240 ipv6_dll = NULL;
1241 } else
1242 break;
1243 }
1244 if (!ipv6_freeaddrinfo || !ipv6_getaddrinfo || !ipv6_getnameinfo) {
1245 ipv6_freeaddrinfo = freeaddrinfo_stub;
1246 ipv6_getaddrinfo = getaddrinfo_stub;
1247 ipv6_getnameinfo = getnameinfo_stub;
1248 }
1250 atexit(socket_cleanup);
1251 initialized = 1;
1252 }
1254 #undef gethostbyname
1255 struct hostent *mingw_gethostbyname(const char *host)
1256 {
1257 ensure_socket_initialization();
1258 return gethostbyname(host);
1259 }
1261 void mingw_freeaddrinfo(struct addrinfo *res)
1262 {
1263 ipv6_freeaddrinfo(res);
1264 }
1266 int mingw_getaddrinfo(const char *node, const char *service,
1267 const struct addrinfo *hints, struct addrinfo **res)
1268 {
1269 ensure_socket_initialization();
1270 return ipv6_getaddrinfo(node, service, hints, res);
1271 }
1273 int mingw_getnameinfo(const struct sockaddr *sa, socklen_t salen,
1274 char *host, DWORD hostlen, char *serv, DWORD servlen,
1275 int flags)
1276 {
1277 ensure_socket_initialization();
1278 return ipv6_getnameinfo(sa, salen, host, hostlen, serv, servlen, flags);
1279 }
1281 int mingw_socket(int domain, int type, int protocol)
1282 {
1283 int sockfd;
1284 SOCKET s;
1286 ensure_socket_initialization();
1287 s = WSASocket(domain, type, protocol, NULL, 0, 0);
1288 if (s == INVALID_SOCKET) {
1289 /*
1290 * WSAGetLastError() values are regular BSD error codes
1291 * biased by WSABASEERR.
1292 * However, strerror() does not know about networking
1293 * specific errors, which are values beginning at 38 or so.
1294 * Therefore, we choose to leave the biased error code
1295 * in errno so that _if_ someone looks up the code somewhere,
1296 * then it is at least the number that are usually listed.
1297 */
1298 errno = WSAGetLastError();
1299 return -1;
1300 }
1301 /* convert into a file descriptor */
1302 if ((sockfd = _open_osfhandle(s, O_RDWR|O_BINARY)) < 0) {
1303 closesocket(s);
1304 return error("unable to make a socket file descriptor: %s",
1305 strerror(errno));
1306 }
1307 return sockfd;
1308 }
1310 #undef connect
1311 int mingw_connect(int sockfd, struct sockaddr *sa, size_t sz)
1312 {
1313 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
1314 return connect(s, sa, sz);
1315 }
1317 #undef bind
1318 int mingw_bind(int sockfd, struct sockaddr *sa, size_t sz)
1319 {
1320 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
1321 return bind(s, sa, sz);
1322 }
1324 #undef setsockopt
1325 int mingw_setsockopt(int sockfd, int lvl, int optname, void *optval, int optlen)
1326 {
1327 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
1328 return setsockopt(s, lvl, optname, (const char*)optval, optlen);
1329 }
1331 #undef listen
1332 int mingw_listen(int sockfd, int backlog)
1333 {
1334 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
1335 return listen(s, backlog);
1336 }
1338 #undef accept
1339 int mingw_accept(int sockfd1, struct sockaddr *sa, socklen_t *sz)
1340 {
1341 int sockfd2;
1343 SOCKET s1 = (SOCKET)_get_osfhandle(sockfd1);
1344 SOCKET s2 = accept(s1, sa, sz);
1346 /* convert into a file descriptor */
1347 if ((sockfd2 = _open_osfhandle(s2, O_RDWR|O_BINARY)) < 0) {
1348 int err = errno;
1349 closesocket(s2);
1350 return error("unable to make a socket file descriptor: %s",
1351 strerror(err));
1352 }
1353 return sockfd2;
1354 }
1356 #undef rename
1357 int mingw_rename(const char *pold, const char *pnew)
1358 {
1359 DWORD attrs, gle;
1360 int tries = 0;
1362 /*
1363 * Try native rename() first to get errno right.
1364 * It is based on MoveFile(), which cannot overwrite existing files.
1365 */
1366 if (!rename(pold, pnew))
1367 return 0;
1368 if (errno != EEXIST)
1369 return -1;
1370 repeat:
1371 if (MoveFileEx(pold, pnew, MOVEFILE_REPLACE_EXISTING))
1372 return 0;
1373 /* TODO: translate more errors */
1374 gle = GetLastError();
1375 if (gle == ERROR_ACCESS_DENIED &&
1376 (attrs = GetFileAttributes(pnew)) != INVALID_FILE_ATTRIBUTES) {
1377 if (attrs & FILE_ATTRIBUTE_DIRECTORY) {
1378 errno = EISDIR;
1379 return -1;
1380 }
1381 if ((attrs & FILE_ATTRIBUTE_READONLY) &&
1382 SetFileAttributes(pnew, attrs & ~FILE_ATTRIBUTE_READONLY)) {
1383 if (MoveFileEx(pold, pnew, MOVEFILE_REPLACE_EXISTING))
1384 return 0;
1385 gle = GetLastError();
1386 /* revert file attributes on failure */
1387 SetFileAttributes(pnew, attrs);
1388 }
1389 }
1390 if (tries < ARRAY_SIZE(delay) && gle == ERROR_ACCESS_DENIED) {
1391 /*
1392 * We assume that some other process had the source or
1393 * destination file open at the wrong moment and retry.
1394 * In order to give the other process a higher chance to
1395 * complete its operation, we give up our time slice now.
1396 * If we have to retry again, we do sleep a bit.
1397 */
1398 Sleep(delay[tries]);
1399 tries++;
1400 goto repeat;
1401 }
1402 if (gle == ERROR_ACCESS_DENIED &&
1403 ask_yes_no_if_possible("Rename from '%s' to '%s' failed. "
1404 "Should I try again?", pold, pnew))
1405 goto repeat;
1407 errno = EACCES;
1408 return -1;
1409 }
1411 /*
1412 * Note that this doesn't return the actual pagesize, but
1413 * the allocation granularity. If future Windows specific git code
1414 * needs the real getpagesize function, we need to find another solution.
1415 */
1416 int mingw_getpagesize(void)
1417 {
1418 SYSTEM_INFO si;
1419 GetSystemInfo(&si);
1420 return si.dwAllocationGranularity;
1421 }
1423 struct passwd *getpwuid(int uid)
1424 {
1425 static char user_name[100];
1426 static struct passwd p;
1428 DWORD len = sizeof(user_name);
1429 if (!GetUserName(user_name, &len))
1430 return NULL;
1431 p.pw_name = user_name;
1432 p.pw_gecos = "unknown";
1433 p.pw_dir = NULL;
1434 return &p;
1435 }
1437 static HANDLE timer_event;
1438 static HANDLE timer_thread;
1439 static int timer_interval;
1440 static int one_shot;
1441 static sig_handler_t timer_fn = SIG_DFL;
1443 /* The timer works like this:
1444 * The thread, ticktack(), is a trivial routine that most of the time
1445 * only waits to receive the signal to terminate. The main thread tells
1446 * the thread to terminate by setting the timer_event to the signalled
1447 * state.
1448 * But ticktack() interrupts the wait state after the timer's interval
1449 * length to call the signal handler.
1450 */
1452 static unsigned __stdcall ticktack(void *dummy)
1453 {
1454 while (WaitForSingleObject(timer_event, timer_interval) == WAIT_TIMEOUT) {
1455 if (timer_fn == SIG_DFL)
1456 die("Alarm");
1457 if (timer_fn != SIG_IGN)
1458 timer_fn(SIGALRM);
1459 if (one_shot)
1460 break;
1461 }
1462 return 0;
1463 }
1465 static int start_timer_thread(void)
1466 {
1467 timer_event = CreateEvent(NULL, FALSE, FALSE, NULL);
1468 if (timer_event) {
1469 timer_thread = (HANDLE) _beginthreadex(NULL, 0, ticktack, NULL, 0, NULL);
1470 if (!timer_thread )
1471 return errno = ENOMEM,
1472 error("cannot start timer thread");
1473 } else
1474 return errno = ENOMEM,
1475 error("cannot allocate resources for timer");
1476 return 0;
1477 }
1479 static void stop_timer_thread(void)
1480 {
1481 if (timer_event)
1482 SetEvent(timer_event); /* tell thread to terminate */
1483 if (timer_thread) {
1484 int rc = WaitForSingleObject(timer_thread, 1000);
1485 if (rc == WAIT_TIMEOUT)
1486 error("timer thread did not terminate timely");
1487 else if (rc != WAIT_OBJECT_0)
1488 error("waiting for timer thread failed: %lu",
1489 GetLastError());
1490 CloseHandle(timer_thread);
1491 }
1492 if (timer_event)
1493 CloseHandle(timer_event);
1494 timer_event = NULL;
1495 timer_thread = NULL;
1496 }
1498 static inline int is_timeval_eq(const struct timeval *i1, const struct timeval *i2)
1499 {
1500 return i1->tv_sec == i2->tv_sec && i1->tv_usec == i2->tv_usec;
1501 }
1503 int setitimer(int type, struct itimerval *in, struct itimerval *out)
1504 {
1505 static const struct timeval zero;
1506 static int atexit_done;
1508 if (out != NULL)
1509 return errno = EINVAL,
1510 error("setitimer param 3 != NULL not implemented");
1511 if (!is_timeval_eq(&in->it_interval, &zero) &&
1512 !is_timeval_eq(&in->it_interval, &in->it_value))
1513 return errno = EINVAL,
1514 error("setitimer: it_interval must be zero or eq it_value");
1516 if (timer_thread)
1517 stop_timer_thread();
1519 if (is_timeval_eq(&in->it_value, &zero) &&
1520 is_timeval_eq(&in->it_interval, &zero))
1521 return 0;
1523 timer_interval = in->it_value.tv_sec * 1000 + in->it_value.tv_usec / 1000;
1524 one_shot = is_timeval_eq(&in->it_interval, &zero);
1525 if (!atexit_done) {
1526 atexit(stop_timer_thread);
1527 atexit_done = 1;
1528 }
1529 return start_timer_thread();
1530 }
1532 int sigaction(int sig, struct sigaction *in, struct sigaction *out)
1533 {
1534 if (sig != SIGALRM)
1535 return errno = EINVAL,
1536 error("sigaction only implemented for SIGALRM");
1537 if (out != NULL)
1538 return errno = EINVAL,
1539 error("sigaction: param 3 != NULL not implemented");
1541 timer_fn = in->sa_handler;
1542 return 0;
1543 }
1545 #undef signal
1546 sig_handler_t mingw_signal(int sig, sig_handler_t handler)
1547 {
1548 sig_handler_t old = timer_fn;
1549 if (sig != SIGALRM)
1550 return signal(sig, handler);
1551 timer_fn = handler;
1552 return old;
1553 }
1555 static const char *make_backslash_path(const char *path)
1556 {
1557 static char buf[PATH_MAX + 1];
1558 char *c;
1560 if (strlcpy(buf, path, PATH_MAX) >= PATH_MAX)
1561 die("Too long path: %.*s", 60, path);
1563 for (c = buf; *c; c++) {
1564 if (*c == '/')
1565 *c = '\\';
1566 }
1567 return buf;
1568 }
1570 void mingw_open_html(const char *unixpath)
1571 {
1572 const char *htmlpath = make_backslash_path(unixpath);
1573 typedef HINSTANCE (WINAPI *T)(HWND, const char *,
1574 const char *, const char *, const char *, INT);
1575 T ShellExecute;
1576 HMODULE shell32;
1577 int r;
1579 shell32 = LoadLibrary("shell32.dll");
1580 if (!shell32)
1581 die("cannot load shell32.dll");
1582 ShellExecute = (T)GetProcAddress(shell32, "ShellExecuteA");
1583 if (!ShellExecute)
1584 die("cannot run browser");
1586 printf("Launching default browser to display HTML ...\n");
1587 r = (int)ShellExecute(NULL, "open", htmlpath, NULL, "\\", SW_SHOWNORMAL);
1588 FreeLibrary(shell32);
1589 /* see the MSDN documentation referring to the result codes here */
1590 if (r <= 32) {
1591 die("failed to launch browser for %.*s", MAX_PATH, unixpath);
1592 }
1593 }
1595 int link(const char *oldpath, const char *newpath)
1596 {
1597 typedef BOOL (WINAPI *T)(const char*, const char*, LPSECURITY_ATTRIBUTES);
1598 static T create_hard_link = NULL;
1599 if (!create_hard_link) {
1600 create_hard_link = (T) GetProcAddress(
1601 GetModuleHandle("kernel32.dll"), "CreateHardLinkA");
1602 if (!create_hard_link)
1603 create_hard_link = (T)-1;
1604 }
1605 if (create_hard_link == (T)-1) {
1606 errno = ENOSYS;
1607 return -1;
1608 }
1609 if (!create_hard_link(newpath, oldpath, NULL)) {
1610 errno = err_win_to_posix(GetLastError());
1611 return -1;
1612 }
1613 return 0;
1614 }
1616 char *getpass(const char *prompt)
1617 {
1618 struct strbuf buf = STRBUF_INIT;
1620 fputs(prompt, stderr);
1621 for (;;) {
1622 char c = _getch();
1623 if (c == '\r' || c == '\n')
1624 break;
1625 strbuf_addch(&buf, c);
1626 }
1627 fputs("\n", stderr);
1628 return strbuf_detach(&buf, NULL);
1629 }
1631 pid_t waitpid(pid_t pid, int *status, unsigned options)
1632 {
1633 HANDLE h = OpenProcess(SYNCHRONIZE | PROCESS_QUERY_INFORMATION,
1634 FALSE, pid);
1635 if (!h) {
1636 errno = ECHILD;
1637 return -1;
1638 }
1640 if (pid > 0 && options & WNOHANG) {
1641 if (WAIT_OBJECT_0 != WaitForSingleObject(h, 0)) {
1642 CloseHandle(h);
1643 return 0;
1644 }
1645 options &= ~WNOHANG;
1646 }
1648 if (options == 0) {
1649 struct pinfo_t **ppinfo;
1650 if (WaitForSingleObject(h, INFINITE) != WAIT_OBJECT_0) {
1651 CloseHandle(h);
1652 return 0;
1653 }
1655 if (status)
1656 GetExitCodeProcess(h, (LPDWORD)status);
1658 EnterCriticalSection(&pinfo_cs);
1660 ppinfo = &pinfo;
1661 while (*ppinfo) {
1662 struct pinfo_t *info = *ppinfo;
1663 if (info->pid == pid) {
1664 CloseHandle(info->proc);
1665 *ppinfo = info->next;
1666 free(info);
1667 break;
1668 }
1669 ppinfo = &info->next;
1670 }
1672 LeaveCriticalSection(&pinfo_cs);
1674 CloseHandle(h);
1675 return pid;
1676 }
1677 CloseHandle(h);
1679 errno = EINVAL;
1680 return -1;
1681 }