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Win32: simplify internal mingw_spawn* APIs
[git/mingw.git] / compat / mingw.c
blob1c0b1531b83250caf4714d77e105209b1e44aeb8
1 #include "../git-compat-util.h"
2 #include "win32.h"
3 #include <conio.h>
4 #include "../strbuf.h"
5 #include "../run-command.h"
6
7 static const int delay[] = { 0, 1, 10, 20, 40 };
8
9 int err_win_to_posix(DWORD winerr)
10 {
11 int error = ENOSYS;
12 switch(winerr) {
13 case ERROR_ACCESS_DENIED: error = EACCES; break;
14 case ERROR_ACCOUNT_DISABLED: error = EACCES; break;
15 case ERROR_ACCOUNT_RESTRICTION: error = EACCES; break;
16 case ERROR_ALREADY_ASSIGNED: error = EBUSY; break;
17 case ERROR_ALREADY_EXISTS: error = EEXIST; break;
18 case ERROR_ARITHMETIC_OVERFLOW: error = ERANGE; break;
19 case ERROR_BAD_COMMAND: error = EIO; break;
20 case ERROR_BAD_DEVICE: error = ENODEV; break;
21 case ERROR_BAD_DRIVER_LEVEL: error = ENXIO; break;
22 case ERROR_BAD_EXE_FORMAT: error = ENOEXEC; break;
23 case ERROR_BAD_FORMAT: error = ENOEXEC; break;
24 case ERROR_BAD_LENGTH: error = EINVAL; break;
25 case ERROR_BAD_PATHNAME: error = ENOENT; break;
26 case ERROR_BAD_PIPE: error = EPIPE; break;
27 case ERROR_BAD_UNIT: error = ENODEV; break;
28 case ERROR_BAD_USERNAME: error = EINVAL; break;
29 case ERROR_BROKEN_PIPE: error = EPIPE; break;
30 case ERROR_BUFFER_OVERFLOW: error = ENAMETOOLONG; break;
31 case ERROR_BUSY: error = EBUSY; break;
32 case ERROR_BUSY_DRIVE: error = EBUSY; break;
33 case ERROR_CALL_NOT_IMPLEMENTED: error = ENOSYS; break;
34 case ERROR_CANNOT_MAKE: error = EACCES; break;
35 case ERROR_CANTOPEN: error = EIO; break;
36 case ERROR_CANTREAD: error = EIO; break;
37 case ERROR_CANTWRITE: error = EIO; break;
38 case ERROR_CRC: error = EIO; break;
39 case ERROR_CURRENT_DIRECTORY: error = EACCES; break;
40 case ERROR_DEVICE_IN_USE: error = EBUSY; break;
41 case ERROR_DEV_NOT_EXIST: error = ENODEV; break;
42 case ERROR_DIRECTORY: error = EINVAL; break;
43 case ERROR_DIR_NOT_EMPTY: error = ENOTEMPTY; break;
44 case ERROR_DISK_CHANGE: error = EIO; break;
45 case ERROR_DISK_FULL: error = ENOSPC; break;
46 case ERROR_DRIVE_LOCKED: error = EBUSY; break;
47 case ERROR_ENVVAR_NOT_FOUND: error = EINVAL; break;
48 case ERROR_EXE_MARKED_INVALID: error = ENOEXEC; break;
49 case ERROR_FILENAME_EXCED_RANGE: error = ENAMETOOLONG; break;
50 case ERROR_FILE_EXISTS: error = EEXIST; break;
51 case ERROR_FILE_INVALID: error = ENODEV; break;
52 case ERROR_FILE_NOT_FOUND: error = ENOENT; break;
53 case ERROR_GEN_FAILURE: error = EIO; break;
54 case ERROR_HANDLE_DISK_FULL: error = ENOSPC; break;
55 case ERROR_INSUFFICIENT_BUFFER: error = ENOMEM; break;
56 case ERROR_INVALID_ACCESS: error = EACCES; break;
57 case ERROR_INVALID_ADDRESS: error = EFAULT; break;
58 case ERROR_INVALID_BLOCK: error = EFAULT; break;
59 case ERROR_INVALID_DATA: error = EINVAL; break;
60 case ERROR_INVALID_DRIVE: error = ENODEV; break;
61 case ERROR_INVALID_EXE_SIGNATURE: error = ENOEXEC; break;
62 case ERROR_INVALID_FLAGS: error = EINVAL; break;
63 case ERROR_INVALID_FUNCTION: error = ENOSYS; break;
64 case ERROR_INVALID_HANDLE: error = EBADF; break;
65 case ERROR_INVALID_LOGON_HOURS: error = EACCES; break;
66 case ERROR_INVALID_NAME: error = EINVAL; break;
67 case ERROR_INVALID_OWNER: error = EINVAL; break;
68 case ERROR_INVALID_PARAMETER: error = EINVAL; break;
69 case ERROR_INVALID_PASSWORD: error = EPERM; break;
70 case ERROR_INVALID_PRIMARY_GROUP: error = EINVAL; break;
71 case ERROR_INVALID_SIGNAL_NUMBER: error = EINVAL; break;
72 case ERROR_INVALID_TARGET_HANDLE: error = EIO; break;
73 case ERROR_INVALID_WORKSTATION: error = EACCES; break;
74 case ERROR_IO_DEVICE: error = EIO; break;
75 case ERROR_IO_INCOMPLETE: error = EINTR; break;
76 case ERROR_LOCKED: error = EBUSY; break;
77 case ERROR_LOCK_VIOLATION: error = EACCES; break;
78 case ERROR_LOGON_FAILURE: error = EACCES; break;
79 case ERROR_MAPPED_ALIGNMENT: error = EINVAL; break;
80 case ERROR_META_EXPANSION_TOO_LONG: error = E2BIG; break;
81 case ERROR_MORE_DATA: error = EPIPE; break;
82 case ERROR_NEGATIVE_SEEK: error = ESPIPE; break;
83 case ERROR_NOACCESS: error = EFAULT; break;
84 case ERROR_NONE_MAPPED: error = EINVAL; break;
85 case ERROR_NOT_ENOUGH_MEMORY: error = ENOMEM; break;
86 case ERROR_NOT_READY: error = EAGAIN; break;
87 case ERROR_NOT_SAME_DEVICE: error = EXDEV; break;
88 case ERROR_NO_DATA: error = EPIPE; break;
89 case ERROR_NO_MORE_SEARCH_HANDLES: error = EIO; break;
90 case ERROR_NO_PROC_SLOTS: error = EAGAIN; break;
91 case ERROR_NO_SUCH_PRIVILEGE: error = EACCES; break;
92 case ERROR_OPEN_FAILED: error = EIO; break;
93 case ERROR_OPEN_FILES: error = EBUSY; break;
94 case ERROR_OPERATION_ABORTED: error = EINTR; break;
95 case ERROR_OUTOFMEMORY: error = ENOMEM; break;
96 case ERROR_PASSWORD_EXPIRED: error = EACCES; break;
97 case ERROR_PATH_BUSY: error = EBUSY; break;
98 case ERROR_PATH_NOT_FOUND: error = ENOENT; break;
99 case ERROR_PIPE_BUSY: error = EBUSY; break;
100 case ERROR_PIPE_CONNECTED: error = EPIPE; break;
101 case ERROR_PIPE_LISTENING: error = EPIPE; break;
102 case ERROR_PIPE_NOT_CONNECTED: error = EPIPE; break;
103 case ERROR_PRIVILEGE_NOT_HELD: error = EACCES; break;
104 case ERROR_READ_FAULT: error = EIO; break;
105 case ERROR_SEEK: error = EIO; break;
106 case ERROR_SEEK_ON_DEVICE: error = ESPIPE; break;
107 case ERROR_SHARING_BUFFER_EXCEEDED: error = ENFILE; break;
108 case ERROR_SHARING_VIOLATION: error = EACCES; break;
109 case ERROR_STACK_OVERFLOW: error = ENOMEM; break;
110 case ERROR_SWAPERROR: error = ENOENT; break;
111 case ERROR_TOO_MANY_MODULES: error = EMFILE; break;
112 case ERROR_TOO_MANY_OPEN_FILES: error = EMFILE; break;
113 case ERROR_UNRECOGNIZED_MEDIA: error = ENXIO; break;
114 case ERROR_UNRECOGNIZED_VOLUME: error = ENODEV; break;
115 case ERROR_WAIT_NO_CHILDREN: error = ECHILD; break;
116 case ERROR_WRITE_FAULT: error = EIO; break;
117 case ERROR_WRITE_PROTECT: error = EROFS; break;
118 }
119 return error;
120 }
121
122 static inline int is_file_in_use_error(DWORD errcode)
123 {
124 switch (errcode) {
125 case ERROR_SHARING_VIOLATION:
126 case ERROR_ACCESS_DENIED:
127 return 1;
128 }
129
130 return 0;
131 }
132
133 static int read_yes_no_answer(void)
134 {
135 char answer[1024];
136
137 if (fgets(answer, sizeof(answer), stdin)) {
138 size_t answer_len = strlen(answer);
139 int got_full_line = 0, c;
140
141 /* remove the newline */
142 if (answer_len >= 2 && answer[answer_len-2] == '\r') {
143 answer[answer_len-2] = '\0';
144 got_full_line = 1;
145 } else if (answer_len >= 1 && answer[answer_len-1] == '\n') {
146 answer[answer_len-1] = '\0';
147 got_full_line = 1;
148 }
149 /* flush the buffer in case we did not get the full line */
150 if (!got_full_line)
151 while ((c = getchar()) != EOF && c != '\n')
152 ;
153 } else
154 /* we could not read, return the
155 * default answer which is no */
156 return 0;
157
158 if (tolower(answer[0]) == 'y' && !answer[1])
159 return 1;
160 if (!strncasecmp(answer, "yes", sizeof(answer)))
161 return 1;
162 if (tolower(answer[0]) == 'n' && !answer[1])
163 return 0;
164 if (!strncasecmp(answer, "no", sizeof(answer)))
165 return 0;
166
167 /* did not find an answer we understand */
168 return -1;
169 }
170
171 static int ask_yes_no_if_possible(const char *format, ...)
172 {
173 char question[4096];
174 const char *retry_hook[] = { NULL, NULL, NULL };
175 va_list args;
176
177 va_start(args, format);
178 vsnprintf(question, sizeof(question), format, args);
179 va_end(args);
180
181 if ((retry_hook[0] = mingw_getenv("GIT_ASK_YESNO"))) {
182 retry_hook[1] = question;
183 return !run_command_v_opt(retry_hook, 0);
184 }
185
186 if (!isatty(_fileno(stdin)) || !isatty(_fileno(stderr)))
187 return 0;
188
189 while (1) {
190 int answer;
191 fprintf(stderr, "%s (y/n) ", question);
192
193 if ((answer = read_yes_no_answer()) >= 0)
194 return answer;
195
196 fprintf(stderr, "Sorry, I did not understand your answer. "
197 "Please type 'y' or 'n'\n");
198 }
199 }
200
201 #undef unlink
202 int mingw_unlink(const char *pathname)
203 {
204 int ret, tries = 0;
205
206 /* read-only files cannot be removed */
207 chmod(pathname, 0666);
208 while ((ret = unlink(pathname)) == -1 && tries < ARRAY_SIZE(delay)) {
209 if (!is_file_in_use_error(GetLastError()))
210 break;
211 /*
212 * We assume that some other process had the source or
213 * destination file open at the wrong moment and retry.
214 * In order to give the other process a higher chance to
215 * complete its operation, we give up our time slice now.
216 * If we have to retry again, we do sleep a bit.
217 */
218 Sleep(delay[tries]);
219 tries++;
220 }
221 while (ret == -1 && is_file_in_use_error(GetLastError()) &&
222 ask_yes_no_if_possible("Unlink of file '%s' failed. "
223 "Should I try again?", pathname))
224 ret = unlink(pathname);
225 return ret;
226 }
227
228 static int is_dir_empty(const char *path)
229 {
230 struct strbuf buf = STRBUF_INIT;
231 WIN32_FIND_DATAA findbuf;
232 HANDLE handle;
233
234 strbuf_addf(&buf, "%s\\*", path);
235 handle = FindFirstFileA(buf.buf, &findbuf);
236 if (handle == INVALID_HANDLE_VALUE) {
237 strbuf_release(&buf);
238 return GetLastError() == ERROR_NO_MORE_FILES;
239 }
240
241 while (!strcmp(findbuf.cFileName, ".") ||
242 !strcmp(findbuf.cFileName, ".."))
243 if (!FindNextFile(handle, &findbuf)) {
244 strbuf_release(&buf);
245 return GetLastError() == ERROR_NO_MORE_FILES;
246 }
247 FindClose(handle);
248 strbuf_release(&buf);
249 return 0;
250 }
251
252 #undef rmdir
253 int mingw_rmdir(const char *pathname)
254 {
255 int ret, tries = 0;
256
257 while ((ret = rmdir(pathname)) == -1 && tries < ARRAY_SIZE(delay)) {
258 if (!is_file_in_use_error(GetLastError()))
259 errno = err_win_to_posix(GetLastError());
260 if (errno != EACCES)
261 break;
262 if (!is_dir_empty(pathname)) {
263 errno = ENOTEMPTY;
264 break;
265 }
266 /*
267 * We assume that some other process had the source or
268 * destination file open at the wrong moment and retry.
269 * In order to give the other process a higher chance to
270 * complete its operation, we give up our time slice now.
271 * If we have to retry again, we do sleep a bit.
272 */
273 Sleep(delay[tries]);
274 tries++;
275 }
276 while (ret == -1 && errno == EACCES && is_file_in_use_error(GetLastError()) &&
277 ask_yes_no_if_possible("Deletion of directory '%s' failed. "
278 "Should I try again?", pathname))
279 ret = rmdir(pathname);
280 return ret;
281 }
282
283 #undef open
284 int mingw_open (const char *filename, int oflags, ...)
285 {
286 va_list args;
287 unsigned mode;
288 int fd;
289
290 va_start(args, oflags);
291 mode = va_arg(args, int);
292 va_end(args);
293
294 if (filename && !strcmp(filename, "/dev/null"))
295 filename = "nul";
296
297 fd = open(filename, oflags, mode);
298
299 if (fd < 0 && (oflags & O_CREAT) && errno == EACCES) {
300 DWORD attrs = GetFileAttributes(filename);
301 if (attrs != INVALID_FILE_ATTRIBUTES && (attrs & FILE_ATTRIBUTE_DIRECTORY))
302 errno = EISDIR;
303 }
304 return fd;
305 }
306
307 static BOOL WINAPI ctrl_ignore(DWORD type)
308 {
309 return TRUE;
310 }
311
312 #undef fgetc
313 int mingw_fgetc(FILE *stream)
314 {
315 int ch;
316 if (!isatty(_fileno(stream)))
317 return fgetc(stream);
318
319 SetConsoleCtrlHandler(ctrl_ignore, TRUE);
320 while (1) {
321 ch = fgetc(stream);
322 if (ch != EOF || GetLastError() != ERROR_OPERATION_ABORTED)
323 break;
324
325 /* Ctrl+C was pressed, simulate SIGINT and retry */
326 mingw_raise(SIGINT);
327 }
328 SetConsoleCtrlHandler(ctrl_ignore, FALSE);
329 return ch;
330 }
331
332 #undef fopen
333 FILE *mingw_fopen (const char *filename, const char *otype)
334 {
335 if (filename && !strcmp(filename, "/dev/null"))
336 filename = "nul";
337 return fopen(filename, otype);
338 }
339
340 #undef freopen
341 FILE *mingw_freopen (const char *filename, const char *otype, FILE *stream)
342 {
343 if (filename && !strcmp(filename, "/dev/null"))
344 filename = "nul";
345 return freopen(filename, otype, stream);
346 }
347
348 #undef fflush
349 int mingw_fflush(FILE *stream)
350 {
351 int ret = fflush(stream);
352
353 /*
354 * write() is used behind the scenes of stdio output functions.
355 * Since git code does not check for errors after each stdio write
356 * operation, it can happen that write() is called by a later
357 * stdio function even if an earlier write() call failed. In the
358 * case of a pipe whose readable end was closed, only the first
359 * call to write() reports EPIPE on Windows. Subsequent write()
360 * calls report EINVAL. It is impossible to notice whether this
361 * fflush invocation triggered such a case, therefore, we have to
362 * catch all EINVAL errors whole-sale.
363 */
364 if (ret && errno == EINVAL)
365 errno = EPIPE;
366
367 return ret;
368 }
369
370 /*
371 * The unit of FILETIME is 100-nanoseconds since January 1, 1601, UTC.
372 * Returns the 100-nanoseconds ("hekto nanoseconds") since the epoch.
373 */
374 static inline long long filetime_to_hnsec(const FILETIME *ft)
375 {
376 long long winTime = ((long long)ft->dwHighDateTime << 32) + ft->dwLowDateTime;
377 /* Windows to Unix Epoch conversion */
378 return winTime - 116444736000000000LL;
379 }
380
381 static inline time_t filetime_to_time_t(const FILETIME *ft)
382 {
383 return (time_t)(filetime_to_hnsec(ft) / 10000000);
384 }
385
386 /* We keep the do_lstat code in a separate function to avoid recursion.
387 * When a path ends with a slash, the stat will fail with ENOENT. In
388 * this case, we strip the trailing slashes and stat again.
389 *
390 * If follow is true then act like stat() and report on the link
391 * target. Otherwise report on the link itself.
392 */
393 static int do_lstat(int follow, const char *file_name, struct stat *buf)
394 {
395 int err;
396 WIN32_FILE_ATTRIBUTE_DATA fdata;
397
398 if (!(err = get_file_attr(file_name, &fdata))) {
399 buf->st_ino = 0;
400 buf->st_gid = 0;
401 buf->st_uid = 0;
402 buf->st_nlink = 1;
403 buf->st_mode = file_attr_to_st_mode(fdata.dwFileAttributes);
404 buf->st_size = fdata.nFileSizeLow |
405 (((off_t)fdata.nFileSizeHigh)<<32);
406 buf->st_dev = buf->st_rdev = 0; /* not used by Git */
407 buf->st_atime = filetime_to_time_t(&(fdata.ftLastAccessTime));
408 buf->st_mtime = filetime_to_time_t(&(fdata.ftLastWriteTime));
409 buf->st_ctime = filetime_to_time_t(&(fdata.ftCreationTime));
410 if (fdata.dwFileAttributes & FILE_ATTRIBUTE_REPARSE_POINT) {
411 WIN32_FIND_DATAA findbuf;
412 HANDLE handle = FindFirstFileA(file_name, &findbuf);
413 if (handle != INVALID_HANDLE_VALUE) {
414 if ((findbuf.dwFileAttributes & FILE_ATTRIBUTE_REPARSE_POINT) &&
415 (findbuf.dwReserved0 == IO_REPARSE_TAG_SYMLINK)) {
416 if (follow) {
417 char buffer[MAXIMUM_REPARSE_DATA_BUFFER_SIZE];
418 buf->st_size = readlink(file_name, buffer, MAXIMUM_REPARSE_DATA_BUFFER_SIZE);
419 } else {
420 buf->st_mode = S_IFLNK;
421 }
422 buf->st_mode |= S_IREAD;
423 if (!(findbuf.dwFileAttributes & FILE_ATTRIBUTE_READONLY))
424 buf->st_mode |= S_IWRITE;
425 }
426 FindClose(handle);
427 }
428 }
429 return 0;
430 }
431 errno = err;
432 return -1;
433 }
434
435 /* We provide our own lstat/fstat functions, since the provided
436 * lstat/fstat functions are so slow. These stat functions are
437 * tailored for Git's usage (read: fast), and are not meant to be
438 * complete. Note that Git stat()s are redirected to mingw_lstat()
439 * too, since Windows doesn't really handle symlinks that well.
440 */
441 static int do_stat_internal(int follow, const char *file_name, struct stat *buf)
442 {
443 int namelen;
444 static char alt_name[PATH_MAX];
445
446 if (!do_lstat(follow, file_name, buf))
447 return 0;
448
449 /* if file_name ended in a '/', Windows returned ENOENT;
450 * try again without trailing slashes
451 */
452 if (errno != ENOENT)
453 return -1;
454
455 namelen = strlen(file_name);
456 if (namelen && file_name[namelen-1] != '/')
457 return -1;
458 while (namelen && file_name[namelen-1] == '/')
459 --namelen;
460 if (!namelen || namelen >= PATH_MAX)
461 return -1;
462
463 memcpy(alt_name, file_name, namelen);
464 alt_name[namelen] = 0;
465 return do_lstat(follow, alt_name, buf);
466 }
467
468 int mingw_lstat(const char *file_name, struct stat *buf)
469 {
470 return do_stat_internal(0, file_name, buf);
471 }
472 int mingw_stat(const char *file_name, struct stat *buf)
473 {
474 return do_stat_internal(1, file_name, buf);
475 }
476
477 int mingw_fstat(int fd, struct stat *buf)
478 {
479 HANDLE fh = (HANDLE)_get_osfhandle(fd);
480 BY_HANDLE_FILE_INFORMATION fdata;
481
482 if (fh == INVALID_HANDLE_VALUE) {
483 errno = EBADF;
484 return -1;
485 }
486 /* direct non-file handles to MS's fstat() */
487 if (GetFileType(fh) != FILE_TYPE_DISK)
488 return _fstati64(fd, buf);
489
490 if (GetFileInformationByHandle(fh, &fdata)) {
491 buf->st_ino = 0;
492 buf->st_gid = 0;
493 buf->st_uid = 0;
494 buf->st_nlink = 1;
495 buf->st_mode = file_attr_to_st_mode(fdata.dwFileAttributes);
496 buf->st_size = fdata.nFileSizeLow |
497 (((off_t)fdata.nFileSizeHigh)<<32);
498 buf->st_dev = buf->st_rdev = 0; /* not used by Git */
499 buf->st_atime = filetime_to_time_t(&(fdata.ftLastAccessTime));
500 buf->st_mtime = filetime_to_time_t(&(fdata.ftLastWriteTime));
501 buf->st_ctime = filetime_to_time_t(&(fdata.ftCreationTime));
502 return 0;
503 }
504 errno = EBADF;
505 return -1;
506 }
507
508 static inline void time_t_to_filetime(time_t t, FILETIME *ft)
509 {
510 long long winTime = t * 10000000LL + 116444736000000000LL;
511 ft->dwLowDateTime = winTime;
512 ft->dwHighDateTime = winTime >> 32;
513 }
514
515 int mingw_utime (const char *file_name, const struct utimbuf *times)
516 {
517 FILETIME mft, aft;
518 int fh, rc;
519
520 /* must have write permission */
521 DWORD attrs = GetFileAttributes(file_name);
522 if (attrs != INVALID_FILE_ATTRIBUTES &&
523 (attrs & FILE_ATTRIBUTE_READONLY)) {
524 /* ignore errors here; open() will report them */
525 SetFileAttributes(file_name, attrs & ~FILE_ATTRIBUTE_READONLY);
526 }
527
528 if ((fh = open(file_name, O_RDWR | O_BINARY)) < 0) {
529 rc = -1;
530 goto revert_attrs;
531 }
532
533 if (times) {
534 time_t_to_filetime(times->modtime, &mft);
535 time_t_to_filetime(times->actime, &aft);
536 } else {
537 GetSystemTimeAsFileTime(&mft);
538 aft = mft;
539 }
540 if (!SetFileTime((HANDLE)_get_osfhandle(fh), NULL, &aft, &mft)) {
541 errno = EINVAL;
542 rc = -1;
543 } else
544 rc = 0;
545 close(fh);
546
547 revert_attrs:
548 if (attrs != INVALID_FILE_ATTRIBUTES &&
549 (attrs & FILE_ATTRIBUTE_READONLY)) {
550 /* ignore errors again */
551 SetFileAttributes(file_name, attrs);
552 }
553 return rc;
554 }
555
556 unsigned int sleep (unsigned int seconds)
557 {
558 Sleep(seconds*1000);
559 return 0;
560 }
561
562 int mkstemp(char *template)
563 {
564 char *filename = mktemp(template);
565 if (filename == NULL)
566 return -1;
567 return open(filename, O_RDWR | O_CREAT, 0600);
568 }
569
570 int gettimeofday(struct timeval *tv, void *tz)
571 {
572 FILETIME ft;
573 long long hnsec;
574
575 GetSystemTimeAsFileTime(&ft);
576 hnsec = filetime_to_hnsec(&ft);
577 tv->tv_sec = hnsec / 10000000;
578 tv->tv_usec = (hnsec % 10000000) / 10;
579 return 0;
580 }
581
582 int pipe(int filedes[2])
583 {
584 HANDLE h[2];
585
586 /* this creates non-inheritable handles */
587 if (!CreatePipe(&h[0], &h[1], NULL, 8192)) {
588 errno = err_win_to_posix(GetLastError());
589 return -1;
590 }
591 filedes[0] = _open_osfhandle((int)h[0], O_NOINHERIT);
592 if (filedes[0] < 0) {
593 CloseHandle(h[0]);
594 CloseHandle(h[1]);
595 return -1;
596 }
597 filedes[1] = _open_osfhandle((int)h[1], O_NOINHERIT);
598 if (filedes[0] < 0) {
599 close(filedes[0]);
600 CloseHandle(h[1]);
601 return -1;
602 }
603 return 0;
604 }
605
606 struct tm *gmtime_r(const time_t *timep, struct tm *result)
607 {
608 /* gmtime() in MSVCRT.DLL is thread-safe, but not reentrant */
609 memcpy(result, gmtime(timep), sizeof(struct tm));
610 return result;
611 }
612
613 struct tm *localtime_r(const time_t *timep, struct tm *result)
614 {
615 /* localtime() in MSVCRT.DLL is thread-safe, but not reentrant */
616 memcpy(result, localtime(timep), sizeof(struct tm));
617 return result;
618 }
619
620 #undef getcwd
621 char *mingw_getcwd(char *pointer, int len)
622 {
623 int i;
624 char *ret = getcwd(pointer, len);
625 if (!ret)
626 return ret;
627 for (i = 0; pointer[i]; i++)
628 if (pointer[i] == '\\')
629 pointer[i] = '/';
630 return ret;
631 }
632
633 /*
634 * See http://msdn2.microsoft.com/en-us/library/17w5ykft(vs.71).aspx
635 * (Parsing C++ Command-Line Arguments)
636 */
637 static const char *quote_arg(const char *arg)
638 {
639 /* count chars to quote */
640 int len = 0, n = 0;
641 int force_quotes = 0;
642 char *q, *d;
643 const char *p = arg;
644 if (!*p) force_quotes = 1;
645 while (*p) {
646 if (isspace(*p) || *p == '*' || *p == '?' || *p == '{' || *p == '\'')
647 force_quotes = 1;
648 else if (*p == '"')
649 n++;
650 else if (*p == '\\') {
651 int count = 0;
652 while (*p == '\\') {
653 count++;
654 p++;
655 len++;
656 }
657 if (*p == '"')
658 n += count*2 + 1;
659 continue;
660 }
661 len++;
662 p++;
663 }
664 if (!force_quotes && n == 0)
665 return arg;
666
667 /* insert \ where necessary */
668 d = q = xmalloc(len+n+3);
669 *d++ = '"';
670 while (*arg) {
671 if (*arg == '"')
672 *d++ = '\\';
673 else if (*arg == '\\') {
674 int count = 0;
675 while (*arg == '\\') {
676 count++;
677 *d++ = *arg++;
678 }
679 if (*arg == '"') {
680 while (count-- > 0)
681 *d++ = '\\';
682 *d++ = '\\';
683 }
684 }
685 *d++ = *arg++;
686 }
687 *d++ = '"';
688 *d++ = 0;
689 return q;
690 }
691
692 static const char *parse_interpreter(const char *cmd)
693 {
694 static char buf[100];
695 char *p, *opt;
696 int n, fd;
697
698 /* don't even try a .exe */
699 n = strlen(cmd);
700 if (n >= 4 && !strcasecmp(cmd+n-4, ".exe"))
701 return NULL;
702
703 fd = open(cmd, O_RDONLY);
704 if (fd < 0)
705 return NULL;
706 n = read(fd, buf, sizeof(buf)-1);
707 close(fd);
708 if (n < 4) /* at least '#!/x' and not error */
709 return NULL;
710
711 if (buf[0] != '#' || buf[1] != '!')
712 return NULL;
713 buf[n] = '\0';
714 p = buf + strcspn(buf, "\r\n");
715 if (!*p)
716 return NULL;
717
718 *p = '\0';
719 if (!(p = strrchr(buf+2, '/')) && !(p = strrchr(buf+2, '\\')))
720 return NULL;
721 /* strip options */
722 if ((opt = strchr(p+1, ' ')))
723 *opt = '\0';
724 return p+1;
725 }
726
727 /*
728 * Splits the PATH into parts.
729 */
730 static char **get_path_split(void)
731 {
732 char *p, **path, *envpath = mingw_getenv("PATH");
733 int i, n = 0;
734
735 if (!envpath || !*envpath)
736 return NULL;
737
738 envpath = xstrdup(envpath);
739 p = envpath;
740 while (p) {
741 char *dir = p;
742 p = strchr(p, ';');
743 if (p) *p++ = '\0';
744 if (*dir) { /* not earlier, catches series of ; */
745 ++n;
746 }
747 }
748 if (!n)
749 return NULL;
750
751 path = xmalloc((n+1)*sizeof(char *));
752 p = envpath;
753 i = 0;
754 do {
755 if (*p)
756 path[i++] = xstrdup(p);
757 p = p+strlen(p)+1;
758 } while (i < n);
759 path[i] = NULL;
760
761 free(envpath);
762
763 return path;
764 }
765
766 static void free_path_split(char **path)
767 {
768 char **p = path;
769
770 if (!path)
771 return;
772
773 while (*p)
774 free(*p++);
775 free(path);
776 }
777
778 /*
779 * exe_only means that we only want to detect .exe files, but not scripts
780 * (which do not have an extension)
781 */
782 static char *lookup_prog(const char *dir, const char *cmd, int isexe, int exe_only)
783 {
784 char path[MAX_PATH];
785 snprintf(path, sizeof(path), "%s/%s.exe", dir, cmd);
786
787 if (!isexe && access(path, F_OK) == 0)
788 return xstrdup(path);
789 path[strlen(path)-4] = '\0';
790 if ((!exe_only || isexe) && access(path, F_OK) == 0)
791 if (!(GetFileAttributes(path) & FILE_ATTRIBUTE_DIRECTORY))
792 return xstrdup(path);
793 return NULL;
794 }
795
796 /*
797 * Determines the absolute path of cmd using the split path in path.
798 * If cmd contains a slash or backslash, no lookup is performed.
799 */
800 static char *path_lookup(const char *cmd, char **path, int exe_only)
801 {
802 char *prog = NULL;
803 int len = strlen(cmd);
804 int isexe = len >= 4 && !strcasecmp(cmd+len-4, ".exe");
805
806 if (strchr(cmd, '/') || strchr(cmd, '\\'))
807 prog = xstrdup(cmd);
808
809 while (!prog && *path)
810 prog = lookup_prog(*path++, cmd, isexe, exe_only);
811
812 return prog;
813 }
814
815 static int env_compare(const void *a, const void *b)
816 {
817 char *const *ea = a;
818 char *const *eb = b;
819 return strcasecmp(*ea, *eb);
820 }
821
822 struct pinfo_t {
823 struct pinfo_t *next;
824 pid_t pid;
825 HANDLE proc;
826 };
827 static struct pinfo_t *pinfo = NULL;
828 CRITICAL_SECTION pinfo_cs;
829
830 static pid_t mingw_spawnve_fd(const char *cmd, const char **argv, char **env,
831 const char *dir,
832 int prepend_cmd, int fhin, int fhout, int fherr)
833 {
834 STARTUPINFO si;
835 PROCESS_INFORMATION pi;
836 struct strbuf envblk, args;
837 unsigned flags;
838 BOOL ret;
839
840 /* Determine whether or not we are associated to a console */
841 HANDLE cons = CreateFile("CONOUT$", GENERIC_WRITE,
842 FILE_SHARE_WRITE, NULL, OPEN_EXISTING,
843 FILE_ATTRIBUTE_NORMAL, NULL);
844 if (cons == INVALID_HANDLE_VALUE) {
845 /* There is no console associated with this process.
846 * Since the child is a console process, Windows
847 * would normally create a console window. But
848 * since we'll be redirecting std streams, we do
849 * not need the console.
850 * It is necessary to use DETACHED_PROCESS
851 * instead of CREATE_NO_WINDOW to make ssh
852 * recognize that it has no console.
853 */
854 flags = DETACHED_PROCESS;
855 } else {
856 /* There is already a console. If we specified
857 * DETACHED_PROCESS here, too, Windows would
858 * disassociate the child from the console.
859 * The same is true for CREATE_NO_WINDOW.
860 * Go figure!
861 */
862 flags = 0;
863 CloseHandle(cons);
864 }
865 memset(&si, 0, sizeof(si));
866 si.cb = sizeof(si);
867 si.dwFlags = STARTF_USESTDHANDLES;
868 si.hStdInput = winansi_get_osfhandle(fhin);
869 si.hStdOutput = winansi_get_osfhandle(fhout);
870 si.hStdError = winansi_get_osfhandle(fherr);
871
872 /* concatenate argv, quoting args as we go */
873 strbuf_init(&args, 0);
874 if (prepend_cmd) {
875 char *quoted = (char *)quote_arg(cmd);
876 strbuf_addstr(&args, quoted);
877 if (quoted != cmd)
878 free(quoted);
879 }
880 for (; *argv; argv++) {
881 char *quoted = (char *)quote_arg(*argv);
882 if (*args.buf)
883 strbuf_addch(&args, ' ');
884 strbuf_addstr(&args, quoted);
885 if (quoted != *argv)
886 free(quoted);
887 }
888
889 if (env) {
890 int count = 0;
891 char **e, **sorted_env;
892
893 for (e = env; *e; e++)
894 count++;
895
896 /* environment must be sorted */
897 sorted_env = xmalloc(sizeof(*sorted_env) * (count + 1));
898 memcpy(sorted_env, env, sizeof(*sorted_env) * (count + 1));
899 qsort(sorted_env, count, sizeof(*sorted_env), env_compare);
900
901 strbuf_init(&envblk, 0);
902 for (e = sorted_env; *e; e++) {
903 strbuf_addstr(&envblk, *e);
904 strbuf_addch(&envblk, '\0');
905 }
906 free(sorted_env);
907 }
908
909 memset(&pi, 0, sizeof(pi));
910 ret = CreateProcess(cmd, args.buf, NULL, NULL, TRUE, flags,
911 env ? envblk.buf : NULL, dir, &si, &pi);
912
913 if (env)
914 strbuf_release(&envblk);
915 strbuf_release(&args);
916
917 if (!ret) {
918 errno = ENOENT;
919 return -1;
920 }
921 CloseHandle(pi.hThread);
922
923 /*
924 * The process ID is the human-readable identifier of the process
925 * that we want to present in log and error messages. The handle
926 * is not useful for this purpose. But we cannot close it, either,
927 * because it is not possible to turn a process ID into a process
928 * handle after the process terminated.
929 * Keep the handle in a list for waitpid.
930 */
931 EnterCriticalSection(&pinfo_cs);
932 {
933 struct pinfo_t *info = xmalloc(sizeof(struct pinfo_t));
934 info->pid = pi.dwProcessId;
935 info->proc = pi.hProcess;
936 info->next = pinfo;
937 pinfo = info;
938 }
939 LeaveCriticalSection(&pinfo_cs);
940
941 return (pid_t)pi.dwProcessId;
942 }
943
944 static pid_t mingw_spawnv(const char *cmd, const char **argv, int prepend_cmd)
945 {
946 return mingw_spawnve_fd(cmd, argv, environ, NULL, prepend_cmd, 0, 1, 2);
947 }
948
949 pid_t mingw_spawnvpe(const char *cmd, const char **argv, char **env,
950 const char *dir,
951 int fhin, int fhout, int fherr)
952 {
953 pid_t pid;
954 char **path = get_path_split();
955 char *prog = path_lookup(cmd, path, 0);
956
957 if (!prog) {
958 errno = ENOENT;
959 pid = -1;
960 }
961 else {
962 const char *interpr = parse_interpreter(prog);
963
964 if (interpr) {
965 const char *argv0 = argv[0];
966 char *iprog = path_lookup(interpr, path, 1);
967 argv[0] = prog;
968 if (!iprog) {
969 errno = ENOENT;
970 pid = -1;
971 }
972 else {
973 pid = mingw_spawnve_fd(iprog, argv, env, dir, 1,
974 fhin, fhout, fherr);
975 free(iprog);
976 }
977 argv[0] = argv0;
978 }
979 else
980 pid = mingw_spawnve_fd(prog, argv, env, dir, 0,
981 fhin, fhout, fherr);
982 free(prog);
983 }
984 free_path_split(path);
985 return pid;
986 }
987
988 static int try_shell_exec(const char *cmd, char *const *argv)
989 {
990 const char *interpr = parse_interpreter(cmd);
991 char **path;
992 char *prog;
993 int pid = 0;
994
995 if (!interpr)
996 return 0;
997 path = get_path_split();
998 prog = path_lookup(interpr, path, 1);
999 if (prog) {
1000 int argc = 0;
1001 const char **argv2;
1002 while (argv[argc]) argc++;
1003 argv2 = xmalloc(sizeof(*argv) * (argc+1));
1004 argv2[0] = (char *)cmd; /* full path to the script file */
1005 memcpy(&argv2[1], &argv[1], sizeof(*argv) * argc);
1006 pid = mingw_spawnv(prog, argv2, 1);
1007 if (pid >= 0) {
1008 int status;
1009 if (waitpid(pid, &status, 0) < 0)
1010 status = 255;
1011 exit(status);
1012 }
1013 pid = 1; /* indicate that we tried but failed */
1014 free(prog);
1015 free(argv2);
1016 }
1017 free_path_split(path);
1018 return pid;
1019 }
1020
1021 int mingw_execv(const char *cmd, char *const *argv)
1022 {
1023 /* check if git_command is a shell script */
1024 if (!try_shell_exec(cmd, argv)) {
1025 int pid, status;
1026
1027 pid = mingw_spawnv(cmd, (const char **)argv, 0);
1028 if (pid < 0)
1029 return -1;
1030 if (waitpid(pid, &status, 0) < 0)
1031 status = 255;
1032 exit(status);
1033 }
1034 return -1;
1035 }
1036
1037 int mingw_execvp(const char *cmd, char *const *argv)
1038 {
1039 char **path = get_path_split();
1040 char *prog = path_lookup(cmd, path, 0);
1041
1042 if (prog) {
1043 mingw_execv(prog, argv);
1044 free(prog);
1045 } else
1046 errno = ENOENT;
1047
1048 free_path_split(path);
1049 return -1;
1050 }
1051
1052 int mingw_kill(pid_t pid, int sig)
1053 {
1054 if (pid > 0 && sig == SIGTERM) {
1055 HANDLE h = OpenProcess(PROCESS_TERMINATE, FALSE, pid);
1056
1057 if (TerminateProcess(h, -1)) {
1058 CloseHandle(h);
1059 return 0;
1060 }
1061
1062 errno = err_win_to_posix(GetLastError());
1063 CloseHandle(h);
1064 return -1;
1065 } else if (pid > 0 && sig == 0) {
1066 HANDLE h = OpenProcess(PROCESS_QUERY_INFORMATION, FALSE, pid);
1067 if (h) {
1068 CloseHandle(h);
1069 return 0;
1070 }
1071 }
1072
1073 errno = EINVAL;
1074 return -1;
1075 }
1076
1077 static char **copy_environ(void)
1078 {
1079 char **env;
1080 int i = 0;
1081 while (environ[i])
1082 i++;
1083 env = xmalloc((i+1)*sizeof(*env));
1084 for (i = 0; environ[i]; i++)
1085 env[i] = xstrdup(environ[i]);
1086 env[i] = NULL;
1087 return env;
1088 }
1089
1090 void free_environ(char **env)
1091 {
1092 int i;
1093 for (i = 0; env[i]; i++)
1094 free(env[i]);
1095 free(env);
1096 }
1097
1098 static int lookup_env(char **env, const char *name, size_t nmln)
1099 {
1100 int i;
1101
1102 for (i = 0; env[i]; i++) {
1103 if (0 == strncmp(env[i], name, nmln)
1104 && '=' == env[i][nmln])
1105 /* matches */
1106 return i;
1107 }
1108 return -1;
1109 }
1110
1111 /*
1112 * If name contains '=', then sets the variable, otherwise it unsets it
1113 */
1114 static char **env_setenv(char **env, const char *name)
1115 {
1116 char *eq = strchrnul(name, '=');
1117 int i = lookup_env(env, name, eq-name);
1118
1119 if (i < 0) {
1120 if (*eq) {
1121 for (i = 0; env[i]; i++)
1122 ;
1123 env = xrealloc(env, (i+2)*sizeof(*env));
1124 env[i] = xstrdup(name);
1125 env[i+1] = NULL;
1126 }
1127 }
1128 else {
1129 free(env[i]);
1130 if (*eq)
1131 env[i] = xstrdup(name);
1132 else
1133 for (; env[i]; i++)
1134 env[i] = env[i+1];
1135 }
1136 return env;
1137 }
1138
1139 /*
1140 * Copies global environ and adjusts variables as specified by vars.
1141 */
1142 char **make_augmented_environ(const char *const *vars)
1143 {
1144 char **env = copy_environ();
1145
1146 while (*vars)
1147 env = env_setenv(env, *vars++);
1148 return env;
1149 }
1150
1151 #undef getenv
1152
1153 /*
1154 * The system's getenv looks up the name in a case-insensitive manner.
1155 * This version tries a case-sensitive lookup and falls back to
1156 * case-insensitive if nothing was found. This is necessary because,
1157 * as a prominent example, CMD sets 'Path', but not 'PATH'.
1158 * Warning: not thread-safe.
1159 */
1160 static char *getenv_cs(const char *name)
1161 {
1162 size_t len = strlen(name);
1163 int i = lookup_env(environ, name, len);
1164 if (i >= 0)
1165 return environ[i] + len + 1; /* skip past name and '=' */
1166 return getenv(name);
1167 }
1168
1169 char *mingw_getenv(const char *name)
1170 {
1171 char *result = getenv_cs(name);
1172 if (!result && !strcmp(name, "TMPDIR")) {
1173 /* on Windows it is TMP and TEMP */
1174 result = getenv_cs("TMP");
1175 if (!result)
1176 result = getenv_cs("TEMP");
1177 }
1178 return result;
1179 }
1180
1181 /*
1182 * Note, this isn't a complete replacement for getaddrinfo. It assumes
1183 * that service contains a numerical port, or that it is null. It
1184 * does a simple search using gethostbyname, and returns one IPv4 host
1185 * if one was found.
1186 */
1187 static int WSAAPI getaddrinfo_stub(const char *node, const char *service,
1188 const struct addrinfo *hints,
1189 struct addrinfo **res)
1190 {
1191 struct hostent *h = NULL;
1192 struct addrinfo *ai;
1193 struct sockaddr_in *sin;
1194
1195 if (node) {
1196 h = gethostbyname(node);
1197 if (!h)
1198 return WSAGetLastError();
1199 }
1200
1201 ai = xmalloc(sizeof(struct addrinfo));
1202 *res = ai;
1203 ai->ai_flags = 0;
1204 ai->ai_family = AF_INET;
1205 ai->ai_socktype = hints ? hints->ai_socktype : 0;
1206 switch (ai->ai_socktype) {
1207 case SOCK_STREAM:
1208 ai->ai_protocol = IPPROTO_TCP;
1209 break;
1210 case SOCK_DGRAM:
1211 ai->ai_protocol = IPPROTO_UDP;
1212 break;
1213 default:
1214 ai->ai_protocol = 0;
1215 break;
1216 }
1217 ai->ai_addrlen = sizeof(struct sockaddr_in);
1218 if (hints && (hints->ai_flags & AI_CANONNAME))
1219 ai->ai_canonname = h ? xstrdup(h->h_name) : NULL;
1220 else
1221 ai->ai_canonname = NULL;
1222
1223 sin = xmalloc(ai->ai_addrlen);
1224 memset(sin, 0, ai->ai_addrlen);
1225 sin->sin_family = AF_INET;
1226 /* Note: getaddrinfo is supposed to allow service to be a string,
1227 * which should be looked up using getservbyname. This is
1228 * currently not implemented */
1229 if (service)
1230 sin->sin_port = htons(atoi(service));
1231 if (h)
1232 sin->sin_addr = *(struct in_addr *)h->h_addr;
1233 else if (hints && (hints->ai_flags & AI_PASSIVE))
1234 sin->sin_addr.s_addr = INADDR_ANY;
1235 else
1236 sin->sin_addr.s_addr = INADDR_LOOPBACK;
1237 ai->ai_addr = (struct sockaddr *)sin;
1238 ai->ai_next = NULL;
1239 return 0;
1240 }
1241
1242 static void WSAAPI freeaddrinfo_stub(struct addrinfo *res)
1243 {
1244 free(res->ai_canonname);
1245 free(res->ai_addr);
1246 free(res);
1247 }
1248
1249 static int WSAAPI getnameinfo_stub(const struct sockaddr *sa, socklen_t salen,
1250 char *host, DWORD hostlen,
1251 char *serv, DWORD servlen, int flags)
1252 {
1253 const struct sockaddr_in *sin = (const struct sockaddr_in *)sa;
1254 if (sa->sa_family != AF_INET)
1255 return EAI_FAMILY;
1256 if (!host && !serv)
1257 return EAI_NONAME;
1258
1259 if (host && hostlen > 0) {
1260 struct hostent *ent = NULL;
1261 if (!(flags & NI_NUMERICHOST))
1262 ent = gethostbyaddr((const char *)&sin->sin_addr,
1263 sizeof(sin->sin_addr), AF_INET);
1264
1265 if (ent)
1266 snprintf(host, hostlen, "%s", ent->h_name);
1267 else if (flags & NI_NAMEREQD)
1268 return EAI_NONAME;
1269 else
1270 snprintf(host, hostlen, "%s", inet_ntoa(sin->sin_addr));
1271 }
1272
1273 if (serv && servlen > 0) {
1274 struct servent *ent = NULL;
1275 if (!(flags & NI_NUMERICSERV))
1276 ent = getservbyport(sin->sin_port,
1277 flags & NI_DGRAM ? "udp" : "tcp");
1278
1279 if (ent)
1280 snprintf(serv, servlen, "%s", ent->s_name);
1281 else
1282 snprintf(serv, servlen, "%d", ntohs(sin->sin_port));
1283 }
1284
1285 return 0;
1286 }
1287
1288 static HMODULE ipv6_dll = NULL;
1289 static void (WSAAPI *ipv6_freeaddrinfo)(struct addrinfo *res);
1290 static int (WSAAPI *ipv6_getaddrinfo)(const char *node, const char *service,
1291 const struct addrinfo *hints,
1292 struct addrinfo **res);
1293 static int (WSAAPI *ipv6_getnameinfo)(const struct sockaddr *sa, socklen_t salen,
1294 char *host, DWORD hostlen,
1295 char *serv, DWORD servlen, int flags);
1296 /*
1297 * gai_strerror is an inline function in the ws2tcpip.h header, so we
1298 * don't need to try to load that one dynamically.
1299 */
1300
1301 static void socket_cleanup(void)
1302 {
1303 WSACleanup();
1304 if (ipv6_dll)
1305 FreeLibrary(ipv6_dll);
1306 ipv6_dll = NULL;
1307 ipv6_freeaddrinfo = freeaddrinfo_stub;
1308 ipv6_getaddrinfo = getaddrinfo_stub;
1309 ipv6_getnameinfo = getnameinfo_stub;
1310 }
1311
1312 static void ensure_socket_initialization(void)
1313 {
1314 WSADATA wsa;
1315 static int initialized = 0;
1316 const char *libraries[] = { "ws2_32.dll", "wship6.dll", NULL };
1317 const char **name;
1318
1319 if (initialized)
1320 return;
1321
1322 if (WSAStartup(MAKEWORD(2,2), &wsa))
1323 die("unable to initialize winsock subsystem, error %d",
1324 WSAGetLastError());
1325
1326 for (name = libraries; *name; name++) {
1327 ipv6_dll = LoadLibrary(*name);
1328 if (!ipv6_dll)
1329 continue;
1330
1331 ipv6_freeaddrinfo = (void (WSAAPI *)(struct addrinfo *))
1332 GetProcAddress(ipv6_dll, "freeaddrinfo");
1333 ipv6_getaddrinfo = (int (WSAAPI *)(const char *, const char *,
1334 const struct addrinfo *,
1335 struct addrinfo **))
1336 GetProcAddress(ipv6_dll, "getaddrinfo");
1337 ipv6_getnameinfo = (int (WSAAPI *)(const struct sockaddr *,
1338 socklen_t, char *, DWORD,
1339 char *, DWORD, int))
1340 GetProcAddress(ipv6_dll, "getnameinfo");
1341 if (!ipv6_freeaddrinfo || !ipv6_getaddrinfo || !ipv6_getnameinfo) {
1342 FreeLibrary(ipv6_dll);
1343 ipv6_dll = NULL;
1344 } else
1345 break;
1346 }
1347 if (!ipv6_freeaddrinfo || !ipv6_getaddrinfo || !ipv6_getnameinfo) {
1348 ipv6_freeaddrinfo = freeaddrinfo_stub;
1349 ipv6_getaddrinfo = getaddrinfo_stub;
1350 ipv6_getnameinfo = getnameinfo_stub;
1351 }
1352
1353 atexit(socket_cleanup);
1354 initialized = 1;
1355 }
1356
1357 #undef gethostname
1358 int mingw_gethostname(char *name, int namelen)
1359 {
1360 ensure_socket_initialization();
1361 return gethostname(name, namelen);
1362 }
1363
1364 #undef gethostbyname
1365 struct hostent *mingw_gethostbyname(const char *host)
1366 {
1367 ensure_socket_initialization();
1368 return gethostbyname(host);
1369 }
1370
1371 void mingw_freeaddrinfo(struct addrinfo *res)
1372 {
1373 ipv6_freeaddrinfo(res);
1374 }
1375
1376 int mingw_getaddrinfo(const char *node, const char *service,
1377 const struct addrinfo *hints, struct addrinfo **res)
1378 {
1379 ensure_socket_initialization();
1380 return ipv6_getaddrinfo(node, service, hints, res);
1381 }
1382
1383 int mingw_getnameinfo(const struct sockaddr *sa, socklen_t salen,
1384 char *host, DWORD hostlen, char *serv, DWORD servlen,
1385 int flags)
1386 {
1387 ensure_socket_initialization();
1388 return ipv6_getnameinfo(sa, salen, host, hostlen, serv, servlen, flags);
1389 }
1390
1391 int mingw_socket(int domain, int type, int protocol)
1392 {
1393 int sockfd;
1394 SOCKET s;
1395
1396 ensure_socket_initialization();
1397 s = WSASocket(domain, type, protocol, NULL, 0, 0);
1398 if (s == INVALID_SOCKET) {
1399 /*
1400 * WSAGetLastError() values are regular BSD error codes
1401 * biased by WSABASEERR.
1402 * However, strerror() does not know about networking
1403 * specific errors, which are values beginning at 38 or so.
1404 * Therefore, we choose to leave the biased error code
1405 * in errno so that _if_ someone looks up the code somewhere,
1406 * then it is at least the number that are usually listed.
1407 */
1408 errno = WSAGetLastError();
1409 return -1;
1410 }
1411 /* convert into a file descriptor */
1412 if ((sockfd = _open_osfhandle(s, O_RDWR|O_BINARY)) < 0) {
1413 closesocket(s);
1414 return error("unable to make a socket file descriptor: %s",
1415 strerror(errno));
1416 }
1417 return sockfd;
1418 }
1419
1420 #undef connect
1421 int mingw_connect(int sockfd, struct sockaddr *sa, size_t sz)
1422 {
1423 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
1424 return connect(s, sa, sz);
1425 }
1426
1427 #undef bind
1428 int mingw_bind(int sockfd, struct sockaddr *sa, size_t sz)
1429 {
1430 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
1431 return bind(s, sa, sz);
1432 }
1433
1434 #undef setsockopt
1435 int mingw_setsockopt(int sockfd, int lvl, int optname, void *optval, int optlen)
1436 {
1437 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
1438 return setsockopt(s, lvl, optname, (const char*)optval, optlen);
1439 }
1440
1441 #undef shutdown
1442 int mingw_shutdown(int sockfd, int how)
1443 {
1444 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
1445 return shutdown(s, how);
1446 }
1447
1448 #undef listen
1449 int mingw_listen(int sockfd, int backlog)
1450 {
1451 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
1452 return listen(s, backlog);
1453 }
1454
1455 #undef accept
1456 int mingw_accept(int sockfd1, struct sockaddr *sa, socklen_t *sz)
1457 {
1458 int sockfd2;
1459
1460 SOCKET s1 = (SOCKET)_get_osfhandle(sockfd1);
1461 SOCKET s2 = accept(s1, sa, sz);
1462
1463 /* convert into a file descriptor */
1464 if ((sockfd2 = _open_osfhandle(s2, O_RDWR|O_BINARY)) < 0) {
1465 int err = errno;
1466 closesocket(s2);
1467 return error("unable to make a socket file descriptor: %s",
1468 strerror(err));
1469 }
1470 return sockfd2;
1471 }
1472
1473 #undef rename
1474 int mingw_rename(const char *pold, const char *pnew)
1475 {
1476 DWORD attrs, gle;
1477 int tries = 0;
1478
1479 /*
1480 * Try native rename() first to get errno right.
1481 * It is based on MoveFile(), which cannot overwrite existing files.
1482 */
1483 if (!rename(pold, pnew))
1484 return 0;
1485 if (errno != EEXIST)
1486 return -1;
1487 repeat:
1488 if (MoveFileEx(pold, pnew, MOVEFILE_REPLACE_EXISTING))
1489 return 0;
1490 /* TODO: translate more errors */
1491 gle = GetLastError();
1492 if (gle == ERROR_ACCESS_DENIED &&
1493 (attrs = GetFileAttributes(pnew)) != INVALID_FILE_ATTRIBUTES) {
1494 if (attrs & FILE_ATTRIBUTE_DIRECTORY) {
1495 errno = EISDIR;
1496 return -1;
1497 }
1498 if ((attrs & FILE_ATTRIBUTE_READONLY) &&
1499 SetFileAttributes(pnew, attrs & ~FILE_ATTRIBUTE_READONLY)) {
1500 if (MoveFileEx(pold, pnew, MOVEFILE_REPLACE_EXISTING))
1501 return 0;
1502 gle = GetLastError();
1503 /* revert file attributes on failure */
1504 SetFileAttributes(pnew, attrs);
1505 }
1506 }
1507 if (tries < ARRAY_SIZE(delay) && gle == ERROR_ACCESS_DENIED) {
1508 /*
1509 * We assume that some other process had the source or
1510 * destination file open at the wrong moment and retry.
1511 * In order to give the other process a higher chance to
1512 * complete its operation, we give up our time slice now.
1513 * If we have to retry again, we do sleep a bit.
1514 */
1515 Sleep(delay[tries]);
1516 tries++;
1517 goto repeat;
1518 }
1519 if (gle == ERROR_ACCESS_DENIED &&
1520 ask_yes_no_if_possible("Rename from '%s' to '%s' failed. "
1521 "Should I try again?", pold, pnew))
1522 goto repeat;
1523
1524 errno = EACCES;
1525 return -1;
1526 }
1527
1528 /*
1529 * Note that this doesn't return the actual pagesize, but
1530 * the allocation granularity. If future Windows specific git code
1531 * needs the real getpagesize function, we need to find another solution.
1532 */
1533 int mingw_getpagesize(void)
1534 {
1535 SYSTEM_INFO si;
1536 GetSystemInfo(&si);
1537 return si.dwAllocationGranularity;
1538 }
1539
1540 struct passwd *getpwuid(int uid)
1541 {
1542 static char user_name[100];
1543 static struct passwd p;
1544
1545 DWORD len = sizeof(user_name);
1546 if (!GetUserName(user_name, &len))
1547 return NULL;
1548 p.pw_name = user_name;
1549 p.pw_gecos = "unknown";
1550 p.pw_dir = NULL;
1551 return &p;
1552 }
1553
1554 static HANDLE timer_event;
1555 static HANDLE timer_thread;
1556 static int timer_interval;
1557 static int one_shot;
1558 static sig_handler_t timer_fn = SIG_DFL, sigint_fn = SIG_DFL;
1559
1560 /* The timer works like this:
1561 * The thread, ticktack(), is a trivial routine that most of the time
1562 * only waits to receive the signal to terminate. The main thread tells
1563 * the thread to terminate by setting the timer_event to the signalled
1564 * state.
1565 * But ticktack() interrupts the wait state after the timer's interval
1566 * length to call the signal handler.
1567 */
1568
1569 static unsigned __stdcall ticktack(void *dummy)
1570 {
1571 while (WaitForSingleObject(timer_event, timer_interval) == WAIT_TIMEOUT) {
1572 mingw_raise(SIGALRM);
1573 if (one_shot)
1574 break;
1575 }
1576 return 0;
1577 }
1578
1579 static int start_timer_thread(void)
1580 {
1581 timer_event = CreateEvent(NULL, FALSE, FALSE, NULL);
1582 if (timer_event) {
1583 timer_thread = (HANDLE) _beginthreadex(NULL, 0, ticktack, NULL, 0, NULL);
1584 if (!timer_thread )
1585 return errno = ENOMEM,
1586 error("cannot start timer thread");
1587 } else
1588 return errno = ENOMEM,
1589 error("cannot allocate resources for timer");
1590 return 0;
1591 }
1592
1593 static void stop_timer_thread(void)
1594 {
1595 if (timer_event)
1596 SetEvent(timer_event); /* tell thread to terminate */
1597 if (timer_thread) {
1598 int rc = WaitForSingleObject(timer_thread, 1000);
1599 if (rc == WAIT_TIMEOUT)
1600 error("timer thread did not terminate timely");
1601 else if (rc != WAIT_OBJECT_0)
1602 error("waiting for timer thread failed: %lu",
1603 GetLastError());
1604 CloseHandle(timer_thread);
1605 }
1606 if (timer_event)
1607 CloseHandle(timer_event);
1608 timer_event = NULL;
1609 timer_thread = NULL;
1610 }
1611
1612 static inline int is_timeval_eq(const struct timeval *i1, const struct timeval *i2)
1613 {
1614 return i1->tv_sec == i2->tv_sec && i1->tv_usec == i2->tv_usec;
1615 }
1616
1617 int setitimer(int type, struct itimerval *in, struct itimerval *out)
1618 {
1619 static const struct timeval zero;
1620 static int atexit_done;
1621
1622 if (out != NULL)
1623 return errno = EINVAL,
1624 error("setitimer param 3 != NULL not implemented");
1625 if (!is_timeval_eq(&in->it_interval, &zero) &&
1626 !is_timeval_eq(&in->it_interval, &in->it_value))
1627 return errno = EINVAL,
1628 error("setitimer: it_interval must be zero or eq it_value");
1629
1630 if (timer_thread)
1631 stop_timer_thread();
1632
1633 if (is_timeval_eq(&in->it_value, &zero) &&
1634 is_timeval_eq(&in->it_interval, &zero))
1635 return 0;
1636
1637 timer_interval = in->it_value.tv_sec * 1000 + in->it_value.tv_usec / 1000;
1638 one_shot = is_timeval_eq(&in->it_interval, &zero);
1639 if (!atexit_done) {
1640 atexit(stop_timer_thread);
1641 atexit_done = 1;
1642 }
1643 return start_timer_thread();
1644 }
1645
1646 int sigaction(int sig, struct sigaction *in, struct sigaction *out)
1647 {
1648 if (sig != SIGALRM)
1649 return errno = EINVAL,
1650 error("sigaction only implemented for SIGALRM");
1651 if (out != NULL)
1652 return errno = EINVAL,
1653 error("sigaction: param 3 != NULL not implemented");
1654
1655 timer_fn = in->sa_handler;
1656 return 0;
1657 }
1658
1659 #undef signal
1660 sig_handler_t mingw_signal(int sig, sig_handler_t handler)
1661 {
1662 sig_handler_t old;
1663
1664 switch (sig) {
1665 case SIGALRM:
1666 old = timer_fn;
1667 timer_fn = handler;
1668 break;
1669
1670 case SIGINT:
1671 old = sigint_fn;
1672 sigint_fn = handler;
1673 break;
1674
1675 default:
1676 return signal(sig, handler);
1677 }
1678
1679 return old;
1680 }
1681
1682 #undef raise
1683 int mingw_raise(int sig)
1684 {
1685 switch (sig) {
1686 case SIGALRM:
1687 if (timer_fn == SIG_DFL) {
1688 if (isatty(STDERR_FILENO))
1689 fputs("Alarm clock\n", stderr);
1690 exit(128 + SIGALRM);
1691 } else if (timer_fn != SIG_IGN)
1692 timer_fn(SIGALRM);
1693 return 0;
1694
1695 case SIGINT:
1696 if (sigint_fn == SIG_DFL)
1697 exit(128 + SIGINT);
1698 else if (sigint_fn != SIG_IGN)
1699 sigint_fn(SIGINT);
1700 return 0;
1701
1702 default:
1703 return raise(sig);
1704 }
1705 }
1706
1707
1708 static const char *make_backslash_path(const char *path)
1709 {
1710 static char buf[PATH_MAX + 1];
1711 char *c;
1712
1713 if (strlcpy(buf, path, PATH_MAX) >= PATH_MAX)
1714 die("Too long path: %.*s", 60, path);
1715
1716 for (c = buf; *c; c++) {
1717 if (*c == '/')
1718 *c = '\\';
1719 }
1720 return buf;
1721 }
1722
1723 void mingw_open_html(const char *unixpath)
1724 {
1725 const char *htmlpath = make_backslash_path(unixpath);
1726 typedef HINSTANCE (WINAPI *T)(HWND, const char *,
1727 const char *, const char *, const char *, INT);
1728 T ShellExecute;
1729 HMODULE shell32;
1730 int r;
1731
1732 shell32 = LoadLibrary("shell32.dll");
1733 if (!shell32)
1734 die("cannot load shell32.dll");
1735 ShellExecute = (T)GetProcAddress(shell32, "ShellExecuteA");
1736 if (!ShellExecute)
1737 die("cannot run browser");
1738
1739 printf("Launching default browser to display HTML ...\n");
1740 r = (int)ShellExecute(NULL, "open", htmlpath, NULL, "\\", SW_SHOWNORMAL);
1741 FreeLibrary(shell32);
1742 /* see the MSDN documentation referring to the result codes here */
1743 if (r <= 32) {
1744 die("failed to launch browser for %.*s", MAX_PATH, unixpath);
1745 }
1746 }
1747
1748 int link(const char *oldpath, const char *newpath)
1749 {
1750 typedef BOOL (WINAPI *T)(const char*, const char*, LPSECURITY_ATTRIBUTES);
1751 static T create_hard_link = NULL;
1752 if (!create_hard_link) {
1753 create_hard_link = (T) GetProcAddress(
1754 GetModuleHandle("kernel32.dll"), "CreateHardLinkA");
1755 if (!create_hard_link)
1756 create_hard_link = (T)-1;
1757 }
1758 if (create_hard_link == (T)-1) {
1759 errno = ENOSYS;
1760 return -1;
1761 }
1762 if (!create_hard_link(newpath, oldpath, NULL)) {
1763 errno = err_win_to_posix(GetLastError());
1764 return -1;
1765 }
1766 return 0;
1767 }
1768
1769 pid_t waitpid(pid_t pid, int *status, int options)
1770 {
1771 HANDLE h = OpenProcess(SYNCHRONIZE | PROCESS_QUERY_INFORMATION,
1772 FALSE, pid);
1773 if (!h) {
1774 errno = ECHILD;
1775 return -1;
1776 }
1777
1778 if (pid > 0 && options & WNOHANG) {
1779 if (WAIT_OBJECT_0 != WaitForSingleObject(h, 0)) {
1780 CloseHandle(h);
1781 return 0;
1782 }
1783 options &= ~WNOHANG;
1784 }
1785
1786 if (options == 0) {
1787 struct pinfo_t **ppinfo;
1788 if (WaitForSingleObject(h, INFINITE) != WAIT_OBJECT_0) {
1789 CloseHandle(h);
1790 return 0;
1791 }
1792
1793 if (status)
1794 GetExitCodeProcess(h, (LPDWORD)status);
1795
1796 EnterCriticalSection(&pinfo_cs);
1797
1798 ppinfo = &pinfo;
1799 while (*ppinfo) {
1800 struct pinfo_t *info = *ppinfo;
1801 if (info->pid == pid) {
1802 CloseHandle(info->proc);
1803 *ppinfo = info->next;
1804 free(info);
1805 break;
1806 }
1807 ppinfo = &info->next;
1808 }
1809
1810 LeaveCriticalSection(&pinfo_cs);
1811
1812 CloseHandle(h);
1813 return pid;
1814 }
1815 CloseHandle(h);
1816
1817 errno = EINVAL;
1818 return -1;
1819 }
1820
1821 int mingw_offset_1st_component(const char *path)
1822 {
1823 int offset = 0;
1824 if (has_dos_drive_prefix(path))
1825 offset = 2;
1826
1827 /* unc paths */
1828 else if (is_dir_sep(path[0]) && is_dir_sep(path[1])) {
1829
1830 /* skip server name */
1831 char *pos = strpbrk(path + 2, "\\/");
1832 if (!pos)
1833 return 0; /* Error: malformed unc path */
1834
1835 do {
1836 pos++;
1837 } while (*pos && !is_dir_sep(*pos));
1838
1839 offset = pos - path;
1840 }
1841
1842 return offset + is_dir_sep(path[offset]);
1843 }
1844
1845 int xutftowcsn(wchar_t *wcs, const char *utfs, size_t wcslen, int utflen)
1846 {
1847 int upos = 0, wpos = 0;
1848 const unsigned char *utf = (const unsigned char*) utfs;
1849 if (!utf || !wcs || wcslen < 1) {
1850 errno = EINVAL;
1851 return -1;
1852 }
1853 /* reserve space for \0 */
1854 wcslen--;
1855 if (utflen < 0)
1856 utflen = INT_MAX;
1857
1858 while (upos < utflen) {
1859 int c = utf[upos++] & 0xff;
1860 if (utflen == INT_MAX && c == 0)
1861 break;
1862
1863 if (wpos >= wcslen) {
1864 wcs[wpos] = 0;
1865 errno = ERANGE;
1866 return -1;
1867 }
1868
1869 if (c < 0x80) {
1870 /* ASCII */
1871 wcs[wpos++] = c;
1872 } else if (c >= 0xc2 && c < 0xe0 && upos < utflen &&
1873 (utf[upos] & 0xc0) == 0x80) {
1874 /* 2-byte utf-8 */
1875 c = ((c & 0x1f) << 6);
1876 c |= (utf[upos++] & 0x3f);
1877 wcs[wpos++] = c;
1878 } else if (c >= 0xe0 && c < 0xf0 && upos + 1 < utflen &&
1879 !(c == 0xe0 && utf[upos] < 0xa0) && /* over-long encoding */
1880 (utf[upos] & 0xc0) == 0x80 &&
1881 (utf[upos + 1] & 0xc0) == 0x80) {
1882 /* 3-byte utf-8 */
1883 c = ((c & 0x0f) << 12);
1884 c |= ((utf[upos++] & 0x3f) << 6);
1885 c |= (utf[upos++] & 0x3f);
1886 wcs[wpos++] = c;
1887 } else if (c >= 0xf0 && c < 0xf5 && upos + 2 < utflen &&
1888 wpos + 1 < wcslen &&
1889 !(c == 0xf0 && utf[upos] < 0x90) && /* over-long encoding */
1890 !(c == 0xf4 && utf[upos] >= 0x90) && /* > \u10ffff */
1891 (utf[upos] & 0xc0) == 0x80 &&
1892 (utf[upos + 1] & 0xc0) == 0x80 &&
1893 (utf[upos + 2] & 0xc0) == 0x80) {
1894 /* 4-byte utf-8: convert to \ud8xx \udcxx surrogate pair */
1895 c = ((c & 0x07) << 18);
1896 c |= ((utf[upos++] & 0x3f) << 12);
1897 c |= ((utf[upos++] & 0x3f) << 6);
1898 c |= (utf[upos++] & 0x3f);
1899 c -= 0x10000;
1900 wcs[wpos++] = 0xd800 | (c >> 10);
1901 wcs[wpos++] = 0xdc00 | (c & 0x3ff);
1902 } else if (c >= 0xa0) {
1903 /* invalid utf-8 byte, printable unicode char: convert 1:1 */
1904 wcs[wpos++] = c;
1905 } else {
1906 /* invalid utf-8 byte, non-printable unicode: convert to hex */
1907 static const char *hex = "0123456789abcdef";
1908 wcs[wpos++] = hex[c >> 4];
1909 if (wpos < wcslen)
1910 wcs[wpos++] = hex[c & 0x0f];
1911 }
1912 }
1913 wcs[wpos] = 0;
1914 return wpos;
1915 }
1916
1917 int xwcstoutf(char *utf, const wchar_t *wcs, size_t utflen)
1918 {
1919 if (!wcs || !utf || utflen < 1) {
1920 errno = EINVAL;
1921 return -1;
1922 }
1923 utflen = WideCharToMultiByte(CP_UTF8, 0, wcs, -1, utf, utflen, NULL, NULL);
1924 if (utflen)
1925 return utflen - 1;
1926 errno = ERANGE;
1927 return -1;
1928 }
1929
1930 void mingw_startup()
1931 {
1932 /* copy executable name to argv[0] */
1933 __argv[0] = xstrdup(_pgmptr);
1934
1935 /* initialize critical section for waitpid pinfo_t list */
1936 InitializeCriticalSection(&pinfo_cs);
1937
1938 /* set up default file mode and file modes for stdin/out/err */
1939 _fmode = _O_BINARY;
1940 _setmode(_fileno(stdin), _O_BINARY);
1941 _setmode(_fileno(stdout), _O_BINARY);
1942 _setmode(_fileno(stderr), _O_BINARY);
1943
1944 /* initialize Unicode console */
1945 winansi_init();
1946 }
MinGW port of GIT