Merge branch 'maint'
[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 void 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 }
1019
1020 void mingw_execv(const char *cmd, char *const *argv)
1021 {
1022 mingw_execve(cmd, argv, environ);
1023 }
1024
1025 int mingw_kill(pid_t pid, int sig)
1026 {
1027 if (pid > 0 && sig == SIGTERM) {
1028 HANDLE h = OpenProcess(PROCESS_TERMINATE, FALSE, pid);
1029
1030 if (TerminateProcess(h, -1)) {
1031 CloseHandle(h);
1032 return 0;
1033 }
1034
1035 errno = err_win_to_posix(GetLastError());
1036 CloseHandle(h);
1037 return -1;
1038 }
1039
1040 errno = EINVAL;
1041 return -1;
1042 }
1043
1044 static char **copy_environ(void)
1045 {
1046 char **env;
1047 int i = 0;
1048 while (environ[i])
1049 i++;
1050 env = xmalloc((i+1)*sizeof(*env));
1051 for (i = 0; environ[i]; i++)
1052 env[i] = xstrdup(environ[i]);
1053 env[i] = NULL;
1054 return env;
1055 }
1056
1057 void free_environ(char **env)
1058 {
1059 int i;
1060 for (i = 0; env[i]; i++)
1061 free(env[i]);
1062 free(env);
1063 }
1064
1065 static int lookup_env(char **env, const char *name, size_t nmln)
1066 {
1067 int i;
1068
1069 for (i = 0; env[i]; i++) {
1070 if (0 == strncmp(env[i], name, nmln)
1071 && '=' == env[i][nmln])
1072 /* matches */
1073 return i;
1074 }
1075 return -1;
1076 }
1077
1078 /*
1079 * If name contains '=', then sets the variable, otherwise it unsets it
1080 */
1081 static char **env_setenv(char **env, const char *name)
1082 {
1083 char *eq = strchrnul(name, '=');
1084 int i = lookup_env(env, name, eq-name);
1085
1086 if (i < 0) {
1087 if (*eq) {
1088 for (i = 0; env[i]; i++)
1089 ;
1090 env = xrealloc(env, (i+2)*sizeof(*env));
1091 env[i] = xstrdup(name);
1092 env[i+1] = NULL;
1093 }
1094 }
1095 else {
1096 free(env[i]);
1097 if (*eq)
1098 env[i] = xstrdup(name);
1099 else
1100 for (; env[i]; i++)
1101 env[i] = env[i+1];
1102 }
1103 return env;
1104 }
1105
1106 /*
1107 * Copies global environ and adjusts variables as specified by vars.
1108 */
1109 char **make_augmented_environ(const char *const *vars)
1110 {
1111 char **env = copy_environ();
1112
1113 while (*vars)
1114 env = env_setenv(env, *vars++);
1115 return env;
1116 }
1117
1118 #undef getenv
1119
1120 /*
1121 * The system's getenv looks up the name in a case-insensitive manner.
1122 * This version tries a case-sensitive lookup and falls back to
1123 * case-insensitive if nothing was found. This is necessary because,
1124 * as a prominent example, CMD sets 'Path', but not 'PATH'.
1125 * Warning: not thread-safe.
1126 */
1127 static char *getenv_cs(const char *name)
1128 {
1129 size_t len = strlen(name);
1130 int i = lookup_env(environ, name, len);
1131 if (i >= 0)
1132 return environ[i] + len + 1; /* skip past name and '=' */
1133 return getenv(name);
1134 }
1135
1136 char *mingw_getenv(const char *name)
1137 {
1138 char *result = getenv_cs(name);
1139 if (!result && !strcmp(name, "TMPDIR")) {
1140 /* on Windows it is TMP and TEMP */
1141 result = getenv_cs("TMP");
1142 if (!result)
1143 result = getenv_cs("TEMP");
1144 }
1145 return result;
1146 }
1147
1148 /*
1149 * Note, this isn't a complete replacement for getaddrinfo. It assumes
1150 * that service contains a numerical port, or that it is null. It
1151 * does a simple search using gethostbyname, and returns one IPv4 host
1152 * if one was found.
1153 */
1154 static int WSAAPI getaddrinfo_stub(const char *node, const char *service,
1155 const struct addrinfo *hints,
1156 struct addrinfo **res)
1157 {
1158 struct hostent *h = NULL;
1159 struct addrinfo *ai;
1160 struct sockaddr_in *sin;
1161
1162 if (node) {
1163 h = gethostbyname(node);
1164 if (!h)
1165 return WSAGetLastError();
1166 }
1167
1168 ai = xmalloc(sizeof(struct addrinfo));
1169 *res = ai;
1170 ai->ai_flags = 0;
1171 ai->ai_family = AF_INET;
1172 ai->ai_socktype = hints ? hints->ai_socktype : 0;
1173 switch (ai->ai_socktype) {
1174 case SOCK_STREAM:
1175 ai->ai_protocol = IPPROTO_TCP;
1176 break;
1177 case SOCK_DGRAM:
1178 ai->ai_protocol = IPPROTO_UDP;
1179 break;
1180 default:
1181 ai->ai_protocol = 0;
1182 break;
1183 }
1184 ai->ai_addrlen = sizeof(struct sockaddr_in);
1185 if (hints && (hints->ai_flags & AI_CANONNAME))
1186 ai->ai_canonname = h ? xstrdup(h->h_name) : NULL;
1187 else
1188 ai->ai_canonname = NULL;
1189
1190 sin = xmalloc(ai->ai_addrlen);
1191 memset(sin, 0, ai->ai_addrlen);
1192 sin->sin_family = AF_INET;
1193 /* Note: getaddrinfo is supposed to allow service to be a string,
1194 * which should be looked up using getservbyname. This is
1195 * currently not implemented */
1196 if (service)
1197 sin->sin_port = htons(atoi(service));
1198 if (h)
1199 sin->sin_addr = *(struct in_addr *)h->h_addr;
1200 else if (hints && (hints->ai_flags & AI_PASSIVE))
1201 sin->sin_addr.s_addr = INADDR_ANY;
1202 else
1203 sin->sin_addr.s_addr = INADDR_LOOPBACK;
1204 ai->ai_addr = (struct sockaddr *)sin;
1205 ai->ai_next = 0;
1206 return 0;
1207 }
1208
1209 static void WSAAPI freeaddrinfo_stub(struct addrinfo *res)
1210 {
1211 free(res->ai_canonname);
1212 free(res->ai_addr);
1213 free(res);
1214 }
1215
1216 static int WSAAPI getnameinfo_stub(const struct sockaddr *sa, socklen_t salen,
1217 char *host, DWORD hostlen,
1218 char *serv, DWORD servlen, int flags)
1219 {
1220 const struct sockaddr_in *sin = (const struct sockaddr_in *)sa;
1221 if (sa->sa_family != AF_INET)
1222 return EAI_FAMILY;
1223 if (!host && !serv)
1224 return EAI_NONAME;
1225
1226 if (host && hostlen > 0) {
1227 struct hostent *ent = NULL;
1228 if (!(flags & NI_NUMERICHOST))
1229 ent = gethostbyaddr((const char *)&sin->sin_addr,
1230 sizeof(sin->sin_addr), AF_INET);
1231
1232 if (ent)
1233 snprintf(host, hostlen, "%s", ent->h_name);
1234 else if (flags & NI_NAMEREQD)
1235 return EAI_NONAME;
1236 else
1237 snprintf(host, hostlen, "%s", inet_ntoa(sin->sin_addr));
1238 }
1239
1240 if (serv && servlen > 0) {
1241 struct servent *ent = NULL;
1242 if (!(flags & NI_NUMERICSERV))
1243 ent = getservbyport(sin->sin_port,
1244 flags & NI_DGRAM ? "udp" : "tcp");
1245
1246 if (ent)
1247 snprintf(serv, servlen, "%s", ent->s_name);
1248 else
1249 snprintf(serv, servlen, "%d", ntohs(sin->sin_port));
1250 }
1251
1252 return 0;
1253 }
1254
1255 static HMODULE ipv6_dll = NULL;
1256 static void (WSAAPI *ipv6_freeaddrinfo)(struct addrinfo *res);
1257 static int (WSAAPI *ipv6_getaddrinfo)(const char *node, const char *service,
1258 const struct addrinfo *hints,
1259 struct addrinfo **res);
1260 static int (WSAAPI *ipv6_getnameinfo)(const struct sockaddr *sa, socklen_t salen,
1261 char *host, DWORD hostlen,
1262 char *serv, DWORD servlen, int flags);
1263 /*
1264 * gai_strerror is an inline function in the ws2tcpip.h header, so we
1265 * don't need to try to load that one dynamically.
1266 */
1267
1268 static void socket_cleanup(void)
1269 {
1270 WSACleanup();
1271 if (ipv6_dll)
1272 FreeLibrary(ipv6_dll);
1273 ipv6_dll = NULL;
1274 ipv6_freeaddrinfo = freeaddrinfo_stub;
1275 ipv6_getaddrinfo = getaddrinfo_stub;
1276 ipv6_getnameinfo = getnameinfo_stub;
1277 }
1278
1279 static void ensure_socket_initialization(void)
1280 {
1281 WSADATA wsa;
1282 static int initialized = 0;
1283 const char *libraries[] = { "ws2_32.dll", "wship6.dll", NULL };
1284 const char **name;
1285
1286 if (initialized)
1287 return;
1288
1289 if (WSAStartup(MAKEWORD(2,2), &wsa))
1290 die("unable to initialize winsock subsystem, error %d",
1291 WSAGetLastError());
1292
1293 for (name = libraries; *name; name++) {
1294 ipv6_dll = LoadLibrary(*name);
1295 if (!ipv6_dll)
1296 continue;
1297
1298 ipv6_freeaddrinfo = (void (WSAAPI *)(struct addrinfo *))
1299 GetProcAddress(ipv6_dll, "freeaddrinfo");
1300 ipv6_getaddrinfo = (int (WSAAPI *)(const char *, const char *,
1301 const struct addrinfo *,
1302 struct addrinfo **))
1303 GetProcAddress(ipv6_dll, "getaddrinfo");
1304 ipv6_getnameinfo = (int (WSAAPI *)(const struct sockaddr *,
1305 socklen_t, char *, DWORD,
1306 char *, DWORD, int))
1307 GetProcAddress(ipv6_dll, "getnameinfo");
1308 if (!ipv6_freeaddrinfo || !ipv6_getaddrinfo || !ipv6_getnameinfo) {
1309 FreeLibrary(ipv6_dll);
1310 ipv6_dll = NULL;
1311 } else
1312 break;
1313 }
1314 if (!ipv6_freeaddrinfo || !ipv6_getaddrinfo || !ipv6_getnameinfo) {
1315 ipv6_freeaddrinfo = freeaddrinfo_stub;
1316 ipv6_getaddrinfo = getaddrinfo_stub;
1317 ipv6_getnameinfo = getnameinfo_stub;
1318 }
1319
1320 atexit(socket_cleanup);
1321 initialized = 1;
1322 }
1323
1324 #undef gethostname
1325 int mingw_gethostname(char *name, int namelen)
1326 {
1327 ensure_socket_initialization();
1328 return gethostname(name, namelen);
1329 }
1330
1331 #undef gethostbyname
1332 struct hostent *mingw_gethostbyname(const char *host)
1333 {
1334 ensure_socket_initialization();
1335 return gethostbyname(host);
1336 }
1337
1338 void mingw_freeaddrinfo(struct addrinfo *res)
1339 {
1340 ipv6_freeaddrinfo(res);
1341 }
1342
1343 int mingw_getaddrinfo(const char *node, const char *service,
1344 const struct addrinfo *hints, struct addrinfo **res)
1345 {
1346 ensure_socket_initialization();
1347 return ipv6_getaddrinfo(node, service, hints, res);
1348 }
1349
1350 int mingw_getnameinfo(const struct sockaddr *sa, socklen_t salen,
1351 char *host, DWORD hostlen, char *serv, DWORD servlen,
1352 int flags)
1353 {
1354 ensure_socket_initialization();
1355 return ipv6_getnameinfo(sa, salen, host, hostlen, serv, servlen, flags);
1356 }
1357
1358 int mingw_socket(int domain, int type, int protocol)
1359 {
1360 int sockfd;
1361 SOCKET s;
1362
1363 ensure_socket_initialization();
1364 s = WSASocket(domain, type, protocol, NULL, 0, 0);
1365 if (s == INVALID_SOCKET) {
1366 /*
1367 * WSAGetLastError() values are regular BSD error codes
1368 * biased by WSABASEERR.
1369 * However, strerror() does not know about networking
1370 * specific errors, which are values beginning at 38 or so.
1371 * Therefore, we choose to leave the biased error code
1372 * in errno so that _if_ someone looks up the code somewhere,
1373 * then it is at least the number that are usually listed.
1374 */
1375 errno = WSAGetLastError();
1376 return -1;
1377 }
1378 /* convert into a file descriptor */
1379 if ((sockfd = _open_osfhandle(s, O_RDWR|O_BINARY)) < 0) {
1380 closesocket(s);
1381 return error("unable to make a socket file descriptor: %s",
1382 strerror(errno));
1383 }
1384 return sockfd;
1385 }
1386
1387 #undef connect
1388 int mingw_connect(int sockfd, struct sockaddr *sa, size_t sz)
1389 {
1390 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
1391 return connect(s, sa, sz);
1392 }
1393
1394 #undef bind
1395 int mingw_bind(int sockfd, struct sockaddr *sa, size_t sz)
1396 {
1397 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
1398 return bind(s, sa, sz);
1399 }
1400
1401 #undef setsockopt
1402 int mingw_setsockopt(int sockfd, int lvl, int optname, void *optval, int optlen)
1403 {
1404 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
1405 return setsockopt(s, lvl, optname, (const char*)optval, optlen);
1406 }
1407
1408 #undef shutdown
1409 int mingw_shutdown(int sockfd, int how)
1410 {
1411 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
1412 return shutdown(s, how);
1413 }
1414
1415 #undef listen
1416 int mingw_listen(int sockfd, int backlog)
1417 {
1418 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
1419 return listen(s, backlog);
1420 }
1421
1422 #undef accept
1423 int mingw_accept(int sockfd1, struct sockaddr *sa, socklen_t *sz)
1424 {
1425 int sockfd2;
1426
1427 SOCKET s1 = (SOCKET)_get_osfhandle(sockfd1);
1428 SOCKET s2 = accept(s1, sa, sz);
1429
1430 /* convert into a file descriptor */
1431 if ((sockfd2 = _open_osfhandle(s2, O_RDWR|O_BINARY)) < 0) {
1432 int err = errno;
1433 closesocket(s2);
1434 return error("unable to make a socket file descriptor: %s",
1435 strerror(err));
1436 }
1437 return sockfd2;
1438 }
1439
1440 #undef rename
1441 int mingw_rename(const char *pold, const char *pnew)
1442 {
1443 DWORD attrs, gle;
1444 int tries = 0;
1445
1446 /*
1447 * Try native rename() first to get errno right.
1448 * It is based on MoveFile(), which cannot overwrite existing files.
1449 */
1450 if (!rename(pold, pnew))
1451 return 0;
1452 if (errno != EEXIST)
1453 return -1;
1454 repeat:
1455 if (MoveFileEx(pold, pnew, MOVEFILE_REPLACE_EXISTING))
1456 return 0;
1457 /* TODO: translate more errors */
1458 gle = GetLastError();
1459 if (gle == ERROR_ACCESS_DENIED &&
1460 (attrs = GetFileAttributes(pnew)) != INVALID_FILE_ATTRIBUTES) {
1461 if (attrs & FILE_ATTRIBUTE_DIRECTORY) {
1462 errno = EISDIR;
1463 return -1;
1464 }
1465 if ((attrs & FILE_ATTRIBUTE_READONLY) &&
1466 SetFileAttributes(pnew, attrs & ~FILE_ATTRIBUTE_READONLY)) {
1467 if (MoveFileEx(pold, pnew, MOVEFILE_REPLACE_EXISTING))
1468 return 0;
1469 gle = GetLastError();
1470 /* revert file attributes on failure */
1471 SetFileAttributes(pnew, attrs);
1472 }
1473 }
1474 if (tries < ARRAY_SIZE(delay) && gle == ERROR_ACCESS_DENIED) {
1475 /*
1476 * We assume that some other process had the source or
1477 * destination file open at the wrong moment and retry.
1478 * In order to give the other process a higher chance to
1479 * complete its operation, we give up our time slice now.
1480 * If we have to retry again, we do sleep a bit.
1481 */
1482 Sleep(delay[tries]);
1483 tries++;
1484 goto repeat;
1485 }
1486 if (gle == ERROR_ACCESS_DENIED &&
1487 ask_yes_no_if_possible("Rename from '%s' to '%s' failed. "
1488 "Should I try again?", pold, pnew))
1489 goto repeat;
1490
1491 errno = EACCES;
1492 return -1;
1493 }
1494
1495 /*
1496 * Note that this doesn't return the actual pagesize, but
1497 * the allocation granularity. If future Windows specific git code
1498 * needs the real getpagesize function, we need to find another solution.
1499 */
1500 int mingw_getpagesize(void)
1501 {
1502 SYSTEM_INFO si;
1503 GetSystemInfo(&si);
1504 return si.dwAllocationGranularity;
1505 }
1506
1507 struct passwd *getpwuid(int uid)
1508 {
1509 static char user_name[100];
1510 static struct passwd p;
1511
1512 DWORD len = sizeof(user_name);
1513 if (!GetUserName(user_name, &len))
1514 return NULL;
1515 p.pw_name = user_name;
1516 p.pw_gecos = "unknown";
1517 p.pw_dir = NULL;
1518 return &p;
1519 }
1520
1521 static HANDLE timer_event;
1522 static HANDLE timer_thread;
1523 static int timer_interval;
1524 static int one_shot;
1525 static sig_handler_t timer_fn = SIG_DFL;
1526
1527 /* The timer works like this:
1528 * The thread, ticktack(), is a trivial routine that most of the time
1529 * only waits to receive the signal to terminate. The main thread tells
1530 * the thread to terminate by setting the timer_event to the signalled
1531 * state.
1532 * But ticktack() interrupts the wait state after the timer's interval
1533 * length to call the signal handler.
1534 */
1535
1536 static unsigned __stdcall ticktack(void *dummy)
1537 {
1538 while (WaitForSingleObject(timer_event, timer_interval) == WAIT_TIMEOUT) {
1539 if (timer_fn == SIG_DFL)
1540 die("Alarm");
1541 if (timer_fn != SIG_IGN)
1542 timer_fn(SIGALRM);
1543 if (one_shot)
1544 break;
1545 }
1546 return 0;
1547 }
1548
1549 static int start_timer_thread(void)
1550 {
1551 timer_event = CreateEvent(NULL, FALSE, FALSE, NULL);
1552 if (timer_event) {
1553 timer_thread = (HANDLE) _beginthreadex(NULL, 0, ticktack, NULL, 0, NULL);
1554 if (!timer_thread )
1555 return errno = ENOMEM,
1556 error("cannot start timer thread");
1557 } else
1558 return errno = ENOMEM,
1559 error("cannot allocate resources for timer");
1560 return 0;
1561 }
1562
1563 static void stop_timer_thread(void)
1564 {
1565 if (timer_event)
1566 SetEvent(timer_event); /* tell thread to terminate */
1567 if (timer_thread) {
1568 int rc = WaitForSingleObject(timer_thread, 1000);
1569 if (rc == WAIT_TIMEOUT)
1570 error("timer thread did not terminate timely");
1571 else if (rc != WAIT_OBJECT_0)
1572 error("waiting for timer thread failed: %lu",
1573 GetLastError());
1574 CloseHandle(timer_thread);
1575 }
1576 if (timer_event)
1577 CloseHandle(timer_event);
1578 timer_event = NULL;
1579 timer_thread = NULL;
1580 }
1581
1582 static inline int is_timeval_eq(const struct timeval *i1, const struct timeval *i2)
1583 {
1584 return i1->tv_sec == i2->tv_sec && i1->tv_usec == i2->tv_usec;
1585 }
1586
1587 int setitimer(int type, struct itimerval *in, struct itimerval *out)
1588 {
1589 static const struct timeval zero;
1590 static int atexit_done;
1591
1592 if (out != NULL)
1593 return errno = EINVAL,
1594 error("setitimer param 3 != NULL not implemented");
1595 if (!is_timeval_eq(&in->it_interval, &zero) &&
1596 !is_timeval_eq(&in->it_interval, &in->it_value))
1597 return errno = EINVAL,
1598 error("setitimer: it_interval must be zero or eq it_value");
1599
1600 if (timer_thread)
1601 stop_timer_thread();
1602
1603 if (is_timeval_eq(&in->it_value, &zero) &&
1604 is_timeval_eq(&in->it_interval, &zero))
1605 return 0;
1606
1607 timer_interval = in->it_value.tv_sec * 1000 + in->it_value.tv_usec / 1000;
1608 one_shot = is_timeval_eq(&in->it_interval, &zero);
1609 if (!atexit_done) {
1610 atexit(stop_timer_thread);
1611 atexit_done = 1;
1612 }
1613 return start_timer_thread();
1614 }
1615
1616 int sigaction(int sig, struct sigaction *in, struct sigaction *out)
1617 {
1618 if (sig != SIGALRM)
1619 return errno = EINVAL,
1620 error("sigaction only implemented for SIGALRM");
1621 if (out != NULL)
1622 return errno = EINVAL,
1623 error("sigaction: param 3 != NULL not implemented");
1624
1625 timer_fn = in->sa_handler;
1626 return 0;
1627 }
1628
1629 #undef signal
1630 sig_handler_t mingw_signal(int sig, sig_handler_t handler)
1631 {
1632 sig_handler_t old = timer_fn;
1633 if (sig != SIGALRM)
1634 return signal(sig, handler);
1635 timer_fn = handler;
1636 return old;
1637 }
1638
1639 static const char *make_backslash_path(const char *path)
1640 {
1641 static char buf[PATH_MAX + 1];
1642 char *c;
1643
1644 if (strlcpy(buf, path, PATH_MAX) >= PATH_MAX)
1645 die("Too long path: %.*s", 60, path);
1646
1647 for (c = buf; *c; c++) {
1648 if (*c == '/')
1649 *c = '\\';
1650 }
1651 return buf;
1652 }
1653
1654 void mingw_open_html(const char *unixpath)
1655 {
1656 const char *htmlpath = make_backslash_path(unixpath);
1657 typedef HINSTANCE (WINAPI *T)(HWND, const char *,
1658 const char *, const char *, const char *, INT);
1659 T ShellExecute;
1660 HMODULE shell32;
1661 int r;
1662
1663 shell32 = LoadLibrary("shell32.dll");
1664 if (!shell32)
1665 die("cannot load shell32.dll");
1666 ShellExecute = (T)GetProcAddress(shell32, "ShellExecuteA");
1667 if (!ShellExecute)
1668 die("cannot run browser");
1669
1670 printf("Launching default browser to display HTML ...\n");
1671 r = (int)ShellExecute(NULL, "open", htmlpath, NULL, "\\", SW_SHOWNORMAL);
1672 FreeLibrary(shell32);
1673 /* see the MSDN documentation referring to the result codes here */
1674 if (r <= 32) {
1675 die("failed to launch browser for %.*s", MAX_PATH, unixpath);
1676 }
1677 }
1678
1679 int link(const char *oldpath, const char *newpath)
1680 {
1681 typedef BOOL (WINAPI *T)(const char*, const char*, LPSECURITY_ATTRIBUTES);
1682 static T create_hard_link = NULL;
1683 if (!create_hard_link) {
1684 create_hard_link = (T) GetProcAddress(
1685 GetModuleHandle("kernel32.dll"), "CreateHardLinkA");
1686 if (!create_hard_link)
1687 create_hard_link = (T)-1;
1688 }
1689 if (create_hard_link == (T)-1) {
1690 errno = ENOSYS;
1691 return -1;
1692 }
1693 if (!create_hard_link(newpath, oldpath, NULL)) {
1694 errno = err_win_to_posix(GetLastError());
1695 return -1;
1696 }
1697 return 0;
1698 }
1699
1700 char *getpass(const char *prompt)
1701 {
1702 struct strbuf buf = STRBUF_INIT;
1703
1704 fputs(prompt, stderr);
1705 for (;;) {
1706 char c = _getch();
1707 if (c == '\r' || c == '\n')
1708 break;
1709 strbuf_addch(&buf, c);
1710 }
1711 fputs("\n", stderr);
1712 return strbuf_detach(&buf, NULL);
1713 }
1714
1715 pid_t waitpid(pid_t pid, int *status, unsigned options)
1716 {
1717 HANDLE h = OpenProcess(SYNCHRONIZE | PROCESS_QUERY_INFORMATION,
1718 FALSE, pid);
1719 if (!h) {
1720 errno = ECHILD;
1721 return -1;
1722 }
1723
1724 if (pid > 0 && options & WNOHANG) {
1725 if (WAIT_OBJECT_0 != WaitForSingleObject(h, 0)) {
1726 CloseHandle(h);
1727 return 0;
1728 }
1729 options &= ~WNOHANG;
1730 }
1731
1732 if (options == 0) {
1733 struct pinfo_t **ppinfo;
1734 if (WaitForSingleObject(h, INFINITE) != WAIT_OBJECT_0) {
1735 CloseHandle(h);
1736 return 0;
1737 }
1738
1739 if (status)
1740 GetExitCodeProcess(h, (LPDWORD)status);
1741
1742 EnterCriticalSection(&pinfo_cs);
1743
1744 ppinfo = &pinfo;
1745 while (*ppinfo) {
1746 struct pinfo_t *info = *ppinfo;
1747 if (info->pid == pid) {
1748 CloseHandle(info->proc);
1749 *ppinfo = info->next;
1750 free(info);
1751 break;
1752 }
1753 ppinfo = &info->next;
1754 }
1755
1756 LeaveCriticalSection(&pinfo_cs);
1757
1758 CloseHandle(h);
1759 return pid;
1760 }
1761 CloseHandle(h);
1762
1763 errno = EINVAL;
1764 return -1;
1765 }