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Fixed wrong path delimiter in exe finding
[git/mingw/4msysgit.git] / compat / mingw.c
blob16a99b8002a0b52c8463378fb6a1275bc24846b2
1 #include "../git-compat-util.h"
2 #include "win32.h"
3 #include <conio.h>
4 #include "../strbuf.h"
5 #include "../run-command.h"
6 #include "../cache.h"
7
8 static const int delay[] = { 0, 1, 10, 20, 40 };
9 unsigned int _CRT_fmode = _O_BINARY;
10
11 int err_win_to_posix(DWORD winerr)
12 {
13 int error = ENOSYS;
14 switch(winerr) {
15 case ERROR_ACCESS_DENIED: error = EACCES; break;
16 case ERROR_ACCOUNT_DISABLED: error = EACCES; break;
17 case ERROR_ACCOUNT_RESTRICTION: error = EACCES; break;
18 case ERROR_ALREADY_ASSIGNED: error = EBUSY; break;
19 case ERROR_ALREADY_EXISTS: error = EEXIST; break;
20 case ERROR_ARITHMETIC_OVERFLOW: error = ERANGE; break;
21 case ERROR_BAD_COMMAND: error = EIO; break;
22 case ERROR_BAD_DEVICE: error = ENODEV; break;
23 case ERROR_BAD_DRIVER_LEVEL: error = ENXIO; break;
24 case ERROR_BAD_EXE_FORMAT: error = ENOEXEC; break;
25 case ERROR_BAD_FORMAT: error = ENOEXEC; break;
26 case ERROR_BAD_LENGTH: error = EINVAL; break;
27 case ERROR_BAD_PATHNAME: error = ENOENT; break;
28 case ERROR_BAD_PIPE: error = EPIPE; break;
29 case ERROR_BAD_UNIT: error = ENODEV; break;
30 case ERROR_BAD_USERNAME: error = EINVAL; break;
31 case ERROR_BROKEN_PIPE: error = EPIPE; break;
32 case ERROR_BUFFER_OVERFLOW: error = ENAMETOOLONG; break;
33 case ERROR_BUSY: error = EBUSY; break;
34 case ERROR_BUSY_DRIVE: error = EBUSY; break;
35 case ERROR_CALL_NOT_IMPLEMENTED: error = ENOSYS; break;
36 case ERROR_CANNOT_MAKE: error = EACCES; break;
37 case ERROR_CANTOPEN: error = EIO; break;
38 case ERROR_CANTREAD: error = EIO; break;
39 case ERROR_CANTWRITE: error = EIO; break;
40 case ERROR_CRC: error = EIO; break;
41 case ERROR_CURRENT_DIRECTORY: error = EACCES; break;
42 case ERROR_DEVICE_IN_USE: error = EBUSY; break;
43 case ERROR_DEV_NOT_EXIST: error = ENODEV; break;
44 case ERROR_DIRECTORY: error = EINVAL; break;
45 case ERROR_DIR_NOT_EMPTY: error = ENOTEMPTY; break;
46 case ERROR_DISK_CHANGE: error = EIO; break;
47 case ERROR_DISK_FULL: error = ENOSPC; break;
48 case ERROR_DRIVE_LOCKED: error = EBUSY; break;
49 case ERROR_ENVVAR_NOT_FOUND: error = EINVAL; break;
50 case ERROR_EXE_MARKED_INVALID: error = ENOEXEC; break;
51 case ERROR_FILENAME_EXCED_RANGE: error = ENAMETOOLONG; break;
52 case ERROR_FILE_EXISTS: error = EEXIST; break;
53 case ERROR_FILE_INVALID: error = ENODEV; break;
54 case ERROR_FILE_NOT_FOUND: error = ENOENT; break;
55 case ERROR_GEN_FAILURE: error = EIO; break;
56 case ERROR_HANDLE_DISK_FULL: error = ENOSPC; break;
57 case ERROR_INSUFFICIENT_BUFFER: error = ENOMEM; break;
58 case ERROR_INVALID_ACCESS: error = EACCES; break;
59 case ERROR_INVALID_ADDRESS: error = EFAULT; break;
60 case ERROR_INVALID_BLOCK: error = EFAULT; break;
61 case ERROR_INVALID_DATA: error = EINVAL; break;
62 case ERROR_INVALID_DRIVE: error = ENODEV; break;
63 case ERROR_INVALID_EXE_SIGNATURE: error = ENOEXEC; break;
64 case ERROR_INVALID_FLAGS: error = EINVAL; break;
65 case ERROR_INVALID_FUNCTION: error = ENOSYS; break;
66 case ERROR_INVALID_HANDLE: error = EBADF; break;
67 case ERROR_INVALID_LOGON_HOURS: error = EACCES; break;
68 case ERROR_INVALID_NAME: error = EINVAL; break;
69 case ERROR_INVALID_OWNER: error = EINVAL; break;
70 case ERROR_INVALID_PARAMETER: error = EINVAL; break;
71 case ERROR_INVALID_PASSWORD: error = EPERM; break;
72 case ERROR_INVALID_PRIMARY_GROUP: error = EINVAL; break;
73 case ERROR_INVALID_SIGNAL_NUMBER: error = EINVAL; break;
74 case ERROR_INVALID_TARGET_HANDLE: error = EIO; break;
75 case ERROR_INVALID_WORKSTATION: error = EACCES; break;
76 case ERROR_IO_DEVICE: error = EIO; break;
77 case ERROR_IO_INCOMPLETE: error = EINTR; break;
78 case ERROR_LOCKED: error = EBUSY; break;
79 case ERROR_LOCK_VIOLATION: error = EACCES; break;
80 case ERROR_LOGON_FAILURE: error = EACCES; break;
81 case ERROR_MAPPED_ALIGNMENT: error = EINVAL; break;
82 case ERROR_META_EXPANSION_TOO_LONG: error = E2BIG; break;
83 case ERROR_MORE_DATA: error = EPIPE; break;
84 case ERROR_NEGATIVE_SEEK: error = ESPIPE; break;
85 case ERROR_NOACCESS: error = EFAULT; break;
86 case ERROR_NONE_MAPPED: error = EINVAL; break;
87 case ERROR_NOT_ENOUGH_MEMORY: error = ENOMEM; break;
88 case ERROR_NOT_READY: error = EAGAIN; break;
89 case ERROR_NOT_SAME_DEVICE: error = EXDEV; break;
90 case ERROR_NO_DATA: error = EPIPE; break;
91 case ERROR_NO_MORE_SEARCH_HANDLES: error = EIO; break;
92 case ERROR_NO_PROC_SLOTS: error = EAGAIN; break;
93 case ERROR_NO_SUCH_PRIVILEGE: error = EACCES; break;
94 case ERROR_OPEN_FAILED: error = EIO; break;
95 case ERROR_OPEN_FILES: error = EBUSY; break;
96 case ERROR_OPERATION_ABORTED: error = EINTR; break;
97 case ERROR_OUTOFMEMORY: error = ENOMEM; break;
98 case ERROR_PASSWORD_EXPIRED: error = EACCES; break;
99 case ERROR_PATH_BUSY: error = EBUSY; break;
100 case ERROR_PATH_NOT_FOUND: error = ENOENT; break;
101 case ERROR_PIPE_BUSY: error = EBUSY; break;
102 case ERROR_PIPE_CONNECTED: error = EPIPE; break;
103 case ERROR_PIPE_LISTENING: error = EPIPE; break;
104 case ERROR_PIPE_NOT_CONNECTED: error = EPIPE; break;
105 case ERROR_PRIVILEGE_NOT_HELD: error = EACCES; break;
106 case ERROR_READ_FAULT: error = EIO; break;
107 case ERROR_SEEK: error = EIO; break;
108 case ERROR_SEEK_ON_DEVICE: error = ESPIPE; break;
109 case ERROR_SHARING_BUFFER_EXCEEDED: error = ENFILE; break;
110 case ERROR_SHARING_VIOLATION: error = EACCES; break;
111 case ERROR_STACK_OVERFLOW: error = ENOMEM; break;
112 case ERROR_SWAPERROR: error = ENOENT; break;
113 case ERROR_TOO_MANY_MODULES: error = EMFILE; break;
114 case ERROR_TOO_MANY_OPEN_FILES: error = EMFILE; break;
115 case ERROR_UNRECOGNIZED_MEDIA: error = ENXIO; break;
116 case ERROR_UNRECOGNIZED_VOLUME: error = ENODEV; break;
117 case ERROR_WAIT_NO_CHILDREN: error = ECHILD; break;
118 case ERROR_WRITE_FAULT: error = EIO; break;
119 case ERROR_WRITE_PROTECT: error = EROFS; break;
120 }
121 return error;
122 }
123
124 static inline int is_file_in_use_error(DWORD errcode)
125 {
126 switch (errcode) {
127 case ERROR_SHARING_VIOLATION:
128 case ERROR_ACCESS_DENIED:
129 return 1;
130 }
131
132 return 0;
133 }
134
135 static int read_yes_no_answer(void)
136 {
137 char answer[1024];
138
139 if (fgets(answer, sizeof(answer), stdin)) {
140 size_t answer_len = strlen(answer);
141 int got_full_line = 0, c;
142
143 /* remove the newline */
144 if (answer_len >= 2 && answer[answer_len-2] == '\r') {
145 answer[answer_len-2] = '\0';
146 got_full_line = 1;
147 } else if (answer_len >= 1 && answer[answer_len-1] == '\n') {
148 answer[answer_len-1] = '\0';
149 got_full_line = 1;
150 }
151 /* flush the buffer in case we did not get the full line */
152 if (!got_full_line)
153 while ((c = getchar()) != EOF && c != '\n')
154 ;
155 } else
156 /* we could not read, return the
157 * default answer which is no */
158 return 0;
159
160 if (tolower(answer[0]) == 'y' && !answer[1])
161 return 1;
162 if (!strncasecmp(answer, "yes", sizeof(answer)))
163 return 1;
164 if (tolower(answer[0]) == 'n' && !answer[1])
165 return 0;
166 if (!strncasecmp(answer, "no", sizeof(answer)))
167 return 0;
168
169 /* did not find an answer we understand */
170 return -1;
171 }
172
173 static int ask_yes_no_if_possible(const char *format, ...)
174 {
175 char question[4096];
176 const char *retry_hook[] = { NULL, NULL, NULL };
177 va_list args;
178
179 va_start(args, format);
180 vsnprintf(question, sizeof(question), format, args);
181 va_end(args);
182
183 if ((retry_hook[0] = mingw_getenv("GIT_ASK_YESNO"))) {
184 retry_hook[1] = question;
185 return !run_command_v_opt(retry_hook, 0);
186 }
187
188 if (!isatty(_fileno(stdin)) || !isatty(_fileno(stderr)))
189 return 0;
190
191 while (1) {
192 int answer;
193 fprintf(stderr, "%s (y/n) ", question);
194
195 if ((answer = read_yes_no_answer()) >= 0)
196 return answer;
197
198 fprintf(stderr, "Sorry, I did not understand your answer. "
199 "Please type 'y' or 'n'\n");
200 }
201 }
202
203 #undef unlink
204 int mingw_unlink(const char *pathname)
205 {
206 int ret, tries = 0;
207
208 /* read-only files cannot be removed */
209 chmod(pathname, 0666);
210 while ((ret = unlink(pathname)) == -1 && tries < ARRAY_SIZE(delay)) {
211 if (!is_file_in_use_error(GetLastError()))
212 break;
213 /*
214 * We assume that some other process had the source or
215 * destination file open at the wrong moment and retry.
216 * In order to give the other process a higher chance to
217 * complete its operation, we give up our time slice now.
218 * If we have to retry again, we do sleep a bit.
219 */
220 Sleep(delay[tries]);
221 tries++;
222 }
223 while (ret == -1 && is_file_in_use_error(GetLastError()) &&
224 ask_yes_no_if_possible("Unlink of file '%s' failed. "
225 "Should I try again?", pathname))
226 ret = unlink(pathname);
227 return ret;
228 }
229
230 static int is_dir_empty(const char *path)
231 {
232 struct strbuf buf = STRBUF_INIT;
233 WIN32_FIND_DATAA findbuf;
234 HANDLE handle;
235
236 strbuf_addf(&buf, "%s\\*", path);
237 handle = FindFirstFileA(buf.buf, &findbuf);
238 if (handle == INVALID_HANDLE_VALUE) {
239 strbuf_release(&buf);
240 return GetLastError() == ERROR_NO_MORE_FILES;
241 }
242
243 while (!strcmp(findbuf.cFileName, ".") ||
244 !strcmp(findbuf.cFileName, ".."))
245 if (!FindNextFile(handle, &findbuf)) {
246 strbuf_release(&buf);
247 return GetLastError() == ERROR_NO_MORE_FILES;
248 }
249 FindClose(handle);
250 strbuf_release(&buf);
251 return 0;
252 }
253
254 #undef rmdir
255 int mingw_rmdir(const char *pathname)
256 {
257 int ret, tries = 0;
258
259 while ((ret = rmdir(pathname)) == -1 && tries < ARRAY_SIZE(delay)) {
260 if (!is_file_in_use_error(GetLastError()))
261 errno = err_win_to_posix(GetLastError());
262 if (errno != EACCES)
263 break;
264 if (!is_dir_empty(pathname)) {
265 errno = ENOTEMPTY;
266 break;
267 }
268 /*
269 * We assume that some other process had the source or
270 * destination file open at the wrong moment and retry.
271 * In order to give the other process a higher chance to
272 * complete its operation, we give up our time slice now.
273 * If we have to retry again, we do sleep a bit.
274 */
275 Sleep(delay[tries]);
276 tries++;
277 }
278 while (ret == -1 && errno == EACCES && is_file_in_use_error(GetLastError()) &&
279 ask_yes_no_if_possible("Deletion of directory '%s' failed. "
280 "Should I try again?", pathname))
281 ret = rmdir(pathname);
282 return ret;
283 }
284
285 static int make_hidden(const char *path)
286 {
287 DWORD attribs = GetFileAttributes(path);
288 if (SetFileAttributes(path, FILE_ATTRIBUTE_HIDDEN | attribs))
289 return 0;
290 errno = err_win_to_posix(GetLastError());
291 return -1;
292 }
293
294 void mingw_mark_as_git_dir(const char *dir)
295 {
296 if (hide_dotfiles != HIDE_DOTFILES_FALSE && !is_bare_repository() &&
297 make_hidden(dir))
298 warning("Failed to make '%s' hidden", dir);
299 git_config_set("core.hideDotFiles",
300 hide_dotfiles == HIDE_DOTFILES_FALSE ? "false" :
301 (hide_dotfiles == HIDE_DOTFILES_DOTGITONLY ?
302 "dotGitOnly" : "true"));
303 }
304
305 #undef mkdir
306 int mingw_mkdir(const char *path, int mode)
307 {
308 int ret = mkdir(path);
309 if (!ret && hide_dotfiles == HIDE_DOTFILES_TRUE) {
310 /*
311 * In Windows a file or dir starting with a dot is not
312 * automatically hidden. So lets mark it as hidden when
313 * such a directory is created.
314 */
315 const char *start = basename((char*)path);
316 if (*start == '.')
317 return make_hidden(path);
318 }
319 return ret;
320 }
321
322 #undef open
323 int mingw_open (const char *filename, int oflags, ...)
324 {
325 va_list args;
326 unsigned mode;
327 int fd;
328
329 va_start(args, oflags);
330 mode = va_arg(args, int);
331 va_end(args);
332
333 if (filename && !strcmp(filename, "/dev/null"))
334 filename = "nul";
335
336 fd = open(filename, oflags, mode);
337
338 if (fd < 0 && (oflags & O_CREAT) && errno == EACCES) {
339 DWORD attrs = GetFileAttributes(filename);
340 if (attrs != INVALID_FILE_ATTRIBUTES && (attrs & FILE_ATTRIBUTE_DIRECTORY))
341 errno = EISDIR;
342 }
343 if ((oflags & O_CREAT) && fd >= 0 &&
344 hide_dotfiles == HIDE_DOTFILES_TRUE) {
345 /*
346 * In Windows a file or dir starting with a dot is not
347 * automatically hidden. So lets mark it as hidden when
348 * such a file is created.
349 */
350 const char *start = basename((char*)filename);
351 if (*start == '.' && make_hidden(filename))
352 warning("Could not mark '%s' as hidden.", filename);
353 }
354 return fd;
355 }
356
357 #undef write
358 ssize_t mingw_write(int fd, const void *buf, size_t count)
359 {
360 /*
361 * While write() calls to a file on a local disk are translated
362 * into WriteFile() calls with a maximum size of 64KB on Windows
363 * XP and 256KB on Vista, no such cap is placed on writes to
364 * files over the network on Windows XP. Unfortunately, there
365 * seems to be a limit of 32MB-28KB on X64 and 64MB-32KB on x86;
366 * bigger writes fail on Windows XP.
367 * So we cap to a nice 31MB here to avoid write failures over
368 * the net without changing the number of WriteFile() calls in
369 * the local case.
370 */
371 return write(fd, buf, min(count, 31 * 1024 * 1024));
372 }
373
374 static BOOL WINAPI ctrl_ignore(DWORD type)
375 {
376 return TRUE;
377 }
378
379 #undef fgetc
380 int mingw_fgetc(FILE *stream)
381 {
382 int ch;
383 if (!isatty(_fileno(stream)))
384 return fgetc(stream);
385
386 SetConsoleCtrlHandler(ctrl_ignore, TRUE);
387 while (1) {
388 ch = fgetc(stream);
389 if (ch != EOF || GetLastError() != ERROR_OPERATION_ABORTED)
390 break;
391
392 /* Ctrl+C was pressed, simulate SIGINT and retry */
393 mingw_raise(SIGINT);
394 }
395 SetConsoleCtrlHandler(ctrl_ignore, FALSE);
396 return ch;
397 }
398
399 #undef fopen
400 FILE *mingw_fopen (const char *filename, const char *otype)
401 {
402 int hide = 0;
403 FILE *file;
404 if (hide_dotfiles == HIDE_DOTFILES_TRUE &&
405 basename((char*)filename)[0] == '.')
406 hide = access(filename, F_OK);
407 if (filename && !strcmp(filename, "/dev/null"))
408 filename = "nul";
409 file = fopen(filename, otype);
410 if (file && hide && make_hidden(filename))
411 warning("Could not mark '%s' as hidden.", filename);
412 return file;
413 }
414
415 #undef freopen
416 FILE *mingw_freopen (const char *filename, const char *otype, FILE *stream)
417 {
418 int hide = 0;
419 FILE *file;
420 if (hide_dotfiles == HIDE_DOTFILES_TRUE &&
421 basename((char*)filename)[0] == '.')
422 hide = access(filename, F_OK);
423 if (filename && !strcmp(filename, "/dev/null"))
424 filename = "nul";
425 file = freopen(filename, otype, stream);
426 if (file && hide && make_hidden(filename))
427 warning("Could not mark '%s' as hidden.", filename);
428 return file;
429 }
430
431 #undef fflush
432 int mingw_fflush(FILE *stream)
433 {
434 int ret = fflush(stream);
435
436 /*
437 * write() is used behind the scenes of stdio output functions.
438 * Since git code does not check for errors after each stdio write
439 * operation, it can happen that write() is called by a later
440 * stdio function even if an earlier write() call failed. In the
441 * case of a pipe whose readable end was closed, only the first
442 * call to write() reports EPIPE on Windows. Subsequent write()
443 * calls report EINVAL. It is impossible to notice whether this
444 * fflush invocation triggered such a case, therefore, we have to
445 * catch all EINVAL errors whole-sale.
446 */
447 if (ret && errno == EINVAL)
448 errno = EPIPE;
449
450 return ret;
451 }
452
453 /*
454 * The unit of FILETIME is 100-nanoseconds since January 1, 1601, UTC.
455 * Returns the 100-nanoseconds ("hekto nanoseconds") since the epoch.
456 */
457 static inline long long filetime_to_hnsec(const FILETIME *ft)
458 {
459 long long winTime = ((long long)ft->dwHighDateTime << 32) + ft->dwLowDateTime;
460 /* Windows to Unix Epoch conversion */
461 return winTime - 116444736000000000LL;
462 }
463
464 static inline time_t filetime_to_time_t(const FILETIME *ft)
465 {
466 return (time_t)(filetime_to_hnsec(ft) / 10000000);
467 }
468
469 /* We keep the do_lstat code in a separate function to avoid recursion.
470 * When a path ends with a slash, the stat will fail with ENOENT. In
471 * this case, we strip the trailing slashes and stat again.
472 *
473 * If follow is true then act like stat() and report on the link
474 * target. Otherwise report on the link itself.
475 */
476 static int do_lstat(int follow, const char *file_name, struct stat *buf)
477 {
478 int err;
479 WIN32_FILE_ATTRIBUTE_DATA fdata;
480
481 if (!(err = get_file_attr(file_name, &fdata))) {
482 buf->st_ino = 0;
483 buf->st_gid = 0;
484 buf->st_uid = 0;
485 buf->st_nlink = 1;
486 buf->st_mode = file_attr_to_st_mode(fdata.dwFileAttributes);
487 buf->st_size = fdata.nFileSizeLow |
488 (((off_t)fdata.nFileSizeHigh)<<32);
489 buf->st_dev = buf->st_rdev = 0; /* not used by Git */
490 buf->st_atime = filetime_to_time_t(&(fdata.ftLastAccessTime));
491 buf->st_mtime = filetime_to_time_t(&(fdata.ftLastWriteTime));
492 buf->st_ctime = filetime_to_time_t(&(fdata.ftCreationTime));
493 if (fdata.dwFileAttributes & FILE_ATTRIBUTE_REPARSE_POINT) {
494 WIN32_FIND_DATAA findbuf;
495 HANDLE handle = FindFirstFileA(file_name, &findbuf);
496 if (handle != INVALID_HANDLE_VALUE) {
497 if ((findbuf.dwFileAttributes & FILE_ATTRIBUTE_REPARSE_POINT) &&
498 (findbuf.dwReserved0 == IO_REPARSE_TAG_SYMLINK)) {
499 if (follow) {
500 char buffer[MAXIMUM_REPARSE_DATA_BUFFER_SIZE];
501 buf->st_size = readlink(file_name, buffer, MAXIMUM_REPARSE_DATA_BUFFER_SIZE);
502 } else {
503 buf->st_mode = S_IFLNK;
504 }
505 buf->st_mode |= S_IREAD;
506 if (!(findbuf.dwFileAttributes & FILE_ATTRIBUTE_READONLY))
507 buf->st_mode |= S_IWRITE;
508 }
509 FindClose(handle);
510 }
511 }
512 return 0;
513 }
514 errno = err;
515 return -1;
516 }
517
518 /* We provide our own lstat/fstat functions, since the provided
519 * lstat/fstat functions are so slow. These stat functions are
520 * tailored for Git's usage (read: fast), and are not meant to be
521 * complete. Note that Git stat()s are redirected to mingw_lstat()
522 * too, since Windows doesn't really handle symlinks that well.
523 */
524 static int do_stat_internal(int follow, const char *file_name, struct stat *buf)
525 {
526 int namelen;
527 static char alt_name[PATH_MAX];
528
529 if (!do_lstat(follow, file_name, buf))
530 return 0;
531
532 /* if file_name ended in a '/', Windows returned ENOENT;
533 * try again without trailing slashes
534 */
535 if (errno != ENOENT)
536 return -1;
537
538 namelen = strlen(file_name);
539 if (namelen && file_name[namelen-1] != '/')
540 return -1;
541 while (namelen && file_name[namelen-1] == '/')
542 --namelen;
543 if (!namelen || namelen >= PATH_MAX)
544 return -1;
545
546 memcpy(alt_name, file_name, namelen);
547 alt_name[namelen] = 0;
548 return do_lstat(follow, alt_name, buf);
549 }
550
551 int mingw_lstat(const char *file_name, struct stat *buf)
552 {
553 return do_stat_internal(0, file_name, buf);
554 }
555 int mingw_stat(const char *file_name, struct stat *buf)
556 {
557 return do_stat_internal(1, file_name, buf);
558 }
559
560 int mingw_fstat(int fd, struct stat *buf)
561 {
562 HANDLE fh = (HANDLE)_get_osfhandle(fd);
563 BY_HANDLE_FILE_INFORMATION fdata;
564
565 if (fh == INVALID_HANDLE_VALUE) {
566 errno = EBADF;
567 return -1;
568 }
569 /* direct non-file handles to MS's fstat() */
570 if (GetFileType(fh) != FILE_TYPE_DISK)
571 return _fstati64(fd, buf);
572
573 if (GetFileInformationByHandle(fh, &fdata)) {
574 buf->st_ino = 0;
575 buf->st_gid = 0;
576 buf->st_uid = 0;
577 buf->st_nlink = 1;
578 buf->st_mode = file_attr_to_st_mode(fdata.dwFileAttributes);
579 buf->st_size = fdata.nFileSizeLow |
580 (((off_t)fdata.nFileSizeHigh)<<32);
581 buf->st_dev = buf->st_rdev = 0; /* not used by Git */
582 buf->st_atime = filetime_to_time_t(&(fdata.ftLastAccessTime));
583 buf->st_mtime = filetime_to_time_t(&(fdata.ftLastWriteTime));
584 buf->st_ctime = filetime_to_time_t(&(fdata.ftCreationTime));
585 return 0;
586 }
587 errno = EBADF;
588 return -1;
589 }
590
591 static inline void time_t_to_filetime(time_t t, FILETIME *ft)
592 {
593 long long winTime = t * 10000000LL + 116444736000000000LL;
594 ft->dwLowDateTime = winTime;
595 ft->dwHighDateTime = winTime >> 32;
596 }
597
598 int mingw_utime (const char *file_name, const struct utimbuf *times)
599 {
600 FILETIME mft, aft;
601 int fh, rc;
602
603 /* must have write permission */
604 DWORD attrs = GetFileAttributes(file_name);
605 if (attrs != INVALID_FILE_ATTRIBUTES &&
606 (attrs & FILE_ATTRIBUTE_READONLY)) {
607 /* ignore errors here; open() will report them */
608 SetFileAttributes(file_name, attrs & ~FILE_ATTRIBUTE_READONLY);
609 }
610
611 if ((fh = open(file_name, O_RDWR | O_BINARY)) < 0) {
612 rc = -1;
613 goto revert_attrs;
614 }
615
616 if (times) {
617 time_t_to_filetime(times->modtime, &mft);
618 time_t_to_filetime(times->actime, &aft);
619 } else {
620 GetSystemTimeAsFileTime(&mft);
621 aft = mft;
622 }
623 if (!SetFileTime((HANDLE)_get_osfhandle(fh), NULL, &aft, &mft)) {
624 errno = EINVAL;
625 rc = -1;
626 } else
627 rc = 0;
628 close(fh);
629
630 revert_attrs:
631 if (attrs != INVALID_FILE_ATTRIBUTES &&
632 (attrs & FILE_ATTRIBUTE_READONLY)) {
633 /* ignore errors again */
634 SetFileAttributes(file_name, attrs);
635 }
636 return rc;
637 }
638
639 unsigned int sleep (unsigned int seconds)
640 {
641 Sleep(seconds*1000);
642 return 0;
643 }
644
645 int mkstemp(char *template)
646 {
647 char *filename = mktemp(template);
648 if (filename == NULL)
649 return -1;
650 return open(filename, O_RDWR | O_CREAT, 0600);
651 }
652
653 int gettimeofday(struct timeval *tv, void *tz)
654 {
655 FILETIME ft;
656 long long hnsec;
657
658 GetSystemTimeAsFileTime(&ft);
659 hnsec = filetime_to_hnsec(&ft);
660 tv->tv_sec = hnsec / 10000000;
661 tv->tv_usec = (hnsec % 10000000) / 10;
662 return 0;
663 }
664
665 int pipe(int filedes[2])
666 {
667 HANDLE h[2];
668
669 /* this creates non-inheritable handles */
670 if (!CreatePipe(&h[0], &h[1], NULL, 8192)) {
671 errno = err_win_to_posix(GetLastError());
672 return -1;
673 }
674 filedes[0] = _open_osfhandle((int)h[0], O_NOINHERIT);
675 if (filedes[0] < 0) {
676 CloseHandle(h[0]);
677 CloseHandle(h[1]);
678 return -1;
679 }
680 filedes[1] = _open_osfhandle((int)h[1], O_NOINHERIT);
681 if (filedes[0] < 0) {
682 close(filedes[0]);
683 CloseHandle(h[1]);
684 return -1;
685 }
686 return 0;
687 }
688
689 struct tm *gmtime_r(const time_t *timep, struct tm *result)
690 {
691 /* gmtime() in MSVCRT.DLL is thread-safe, but not reentrant */
692 memcpy(result, gmtime(timep), sizeof(struct tm));
693 return result;
694 }
695
696 struct tm *localtime_r(const time_t *timep, struct tm *result)
697 {
698 /* localtime() in MSVCRT.DLL is thread-safe, but not reentrant */
699 memcpy(result, localtime(timep), sizeof(struct tm));
700 return result;
701 }
702
703 #undef getcwd
704 char *mingw_getcwd(char *pointer, int len)
705 {
706 int i;
707 char *ret = getcwd(pointer, len);
708 if (!ret)
709 return ret;
710 for (i = 0; pointer[i]; i++)
711 if (pointer[i] == '\\')
712 pointer[i] = '/';
713 return ret;
714 }
715
716 /*
717 * See http://msdn2.microsoft.com/en-us/library/17w5ykft(vs.71).aspx
718 * (Parsing C++ Command-Line Arguments)
719 */
720 static const char *quote_arg(const char *arg)
721 {
722 /* count chars to quote */
723 int len = 0, n = 0;
724 int force_quotes = 0;
725 char *q, *d;
726 const char *p = arg;
727 if (!*p) force_quotes = 1;
728 while (*p) {
729 if (isspace(*p) || *p == '*' || *p == '?' || *p == '{' || *p == '\'')
730 force_quotes = 1;
731 else if (*p == '"')
732 n++;
733 else if (*p == '\\') {
734 int count = 0;
735 while (*p == '\\') {
736 count++;
737 p++;
738 len++;
739 }
740 if (*p == '"')
741 n += count*2 + 1;
742 continue;
743 }
744 len++;
745 p++;
746 }
747 if (!force_quotes && n == 0)
748 return arg;
749
750 /* insert \ where necessary */
751 d = q = xmalloc(len+n+3);
752 *d++ = '"';
753 while (*arg) {
754 if (*arg == '"')
755 *d++ = '\\';
756 else if (*arg == '\\') {
757 int count = 0;
758 while (*arg == '\\') {
759 count++;
760 *d++ = *arg++;
761 }
762 if (*arg == '"') {
763 while (count-- > 0)
764 *d++ = '\\';
765 *d++ = '\\';
766 }
767 }
768 *d++ = *arg++;
769 }
770 *d++ = '"';
771 *d++ = 0;
772 return q;
773 }
774
775 static const char *parse_interpreter(const char *cmd)
776 {
777 static char buf[100];
778 char *p, *opt;
779 int n, fd;
780
781 /* don't even try a .exe */
782 n = strlen(cmd);
783 if (n >= 4 && !strcasecmp(cmd+n-4, ".exe"))
784 return NULL;
785
786 fd = open(cmd, O_RDONLY);
787 if (fd < 0)
788 return NULL;
789 n = read(fd, buf, sizeof(buf)-1);
790 close(fd);
791 if (n < 4) /* at least '#!/x' and not error */
792 return NULL;
793
794 if (buf[0] != '#' || buf[1] != '!')
795 return NULL;
796 buf[n] = '\0';
797 p = buf + strcspn(buf, "\r\n");
798 if (!*p)
799 return NULL;
800
801 *p = '\0';
802 if (!(p = strrchr(buf+2, '/')) && !(p = strrchr(buf+2, '\\')))
803 return NULL;
804 /* strip options */
805 if ((opt = strchr(p+1, ' ')))
806 *opt = '\0';
807 return p+1;
808 }
809
810 /*
811 * Splits the PATH into parts.
812 */
813 static char **get_path_split(void)
814 {
815 char *p, **path, *envpath = mingw_getenv("PATH");
816 int i, n = 0;
817
818 if (!envpath || !*envpath)
819 return NULL;
820
821 envpath = xstrdup(envpath);
822 p = envpath;
823 while (p) {
824 char *dir = p;
825 p = strchr(p, ';');
826 if (p) *p++ = '\0';
827 if (*dir) { /* not earlier, catches series of ; */
828 ++n;
829 }
830 }
831 if (!n)
832 return NULL;
833
834 path = xmalloc((n+1)*sizeof(char *));
835 p = envpath;
836 i = 0;
837 do {
838 if (*p)
839 path[i++] = xstrdup(p);
840 p = p+strlen(p)+1;
841 } while (i < n);
842 path[i] = NULL;
843
844 free(envpath);
845
846 return path;
847 }
848
849 static void free_path_split(char **path)
850 {
851 char **p = path;
852
853 if (!path)
854 return;
855
856 while (*p)
857 free(*p++);
858 free(path);
859 }
860
861 /*
862 * exe_only means that we only want to detect .exe files, but not scripts
863 * (which do not have an extension)
864 */
865 static char *lookup_prog(const char *dir, const char *cmd, int isexe, int exe_only)
866 {
867 char path[MAX_PATH];
868 snprintf(path, sizeof(path), "%s\\%s.exe", dir, cmd);
869
870 if (!isexe && access(path, F_OK) == 0)
871 return xstrdup(path);
872 path[strlen(path)-4] = '\0';
873 if ((!exe_only || isexe) && access(path, F_OK) == 0)
874 if (!(GetFileAttributes(path) & FILE_ATTRIBUTE_DIRECTORY))
875 return xstrdup(path);
876 return NULL;
877 }
878
879 /*
880 * Determines the absolute path of cmd using the split path in path.
881 * If cmd contains a slash or backslash, no lookup is performed.
882 */
883 static char *path_lookup(const char *cmd, char **path, int exe_only)
884 {
885 char *prog = NULL;
886 int len = strlen(cmd);
887 int isexe = len >= 4 && !strcasecmp(cmd+len-4, ".exe");
888
889 if (strchr(cmd, '/') || strchr(cmd, '\\'))
890 prog = xstrdup(cmd);
891
892 while (!prog && *path)
893 prog = lookup_prog(*path++, cmd, isexe, exe_only);
894
895 return prog;
896 }
897
898 static int env_compare(const void *a, const void *b)
899 {
900 char *const *ea = a;
901 char *const *eb = b;
902 return strcasecmp(*ea, *eb);
903 }
904
905 struct pinfo_t {
906 struct pinfo_t *next;
907 pid_t pid;
908 HANDLE proc;
909 };
910 static struct pinfo_t *pinfo = NULL;
911 CRITICAL_SECTION pinfo_cs;
912
913 static pid_t mingw_spawnve_fd(const char *cmd, const char **argv, char **env,
914 const char *dir,
915 int prepend_cmd, int fhin, int fhout, int fherr)
916 {
917 STARTUPINFO si;
918 PROCESS_INFORMATION pi;
919 struct strbuf envblk, args;
920 unsigned flags;
921 BOOL ret;
922
923 /* Determine whether or not we are associated to a console */
924 HANDLE cons = CreateFile("CONOUT$", GENERIC_WRITE,
925 FILE_SHARE_WRITE, NULL, OPEN_EXISTING,
926 FILE_ATTRIBUTE_NORMAL, NULL);
927 if (cons == INVALID_HANDLE_VALUE) {
928 /* There is no console associated with this process.
929 * Since the child is a console process, Windows
930 * would normally create a console window. But
931 * since we'll be redirecting std streams, we do
932 * not need the console.
933 * It is necessary to use DETACHED_PROCESS
934 * instead of CREATE_NO_WINDOW to make ssh
935 * recognize that it has no console.
936 */
937 flags = DETACHED_PROCESS;
938 } else {
939 /* There is already a console. If we specified
940 * DETACHED_PROCESS here, too, Windows would
941 * disassociate the child from the console.
942 * The same is true for CREATE_NO_WINDOW.
943 * Go figure!
944 */
945 flags = 0;
946 CloseHandle(cons);
947 }
948 memset(&si, 0, sizeof(si));
949 si.cb = sizeof(si);
950 si.dwFlags = STARTF_USESTDHANDLES;
951 si.hStdInput = (HANDLE) _get_osfhandle(fhin);
952 si.hStdOutput = (HANDLE) _get_osfhandle(fhout);
953 si.hStdError = (HANDLE) _get_osfhandle(fherr);
954
955 /* concatenate argv, quoting args as we go */
956 strbuf_init(&args, 0);
957 if (prepend_cmd) {
958 char *quoted = (char *)quote_arg(cmd);
959 strbuf_addstr(&args, quoted);
960 if (quoted != cmd)
961 free(quoted);
962 }
963 for (; *argv; argv++) {
964 char *quoted = (char *)quote_arg(*argv);
965 if (*args.buf)
966 strbuf_addch(&args, ' ');
967 strbuf_addstr(&args, quoted);
968 if (quoted != *argv)
969 free(quoted);
970 }
971
972 if (env) {
973 int count = 0;
974 char **e, **sorted_env;
975
976 for (e = env; *e; e++)
977 count++;
978
979 /* environment must be sorted */
980 sorted_env = xmalloc(sizeof(*sorted_env) * (count + 1));
981 memcpy(sorted_env, env, sizeof(*sorted_env) * (count + 1));
982 qsort(sorted_env, count, sizeof(*sorted_env), env_compare);
983
984 strbuf_init(&envblk, 0);
985 for (e = sorted_env; *e; e++) {
986 strbuf_addstr(&envblk, *e);
987 strbuf_addch(&envblk, '\0');
988 }
989 free(sorted_env);
990 }
991
992 memset(&pi, 0, sizeof(pi));
993 ret = CreateProcess(cmd, args.buf, NULL, NULL, TRUE, flags,
994 env ? envblk.buf : NULL, dir, &si, &pi);
995
996 if (env)
997 strbuf_release(&envblk);
998 strbuf_release(&args);
999
1000 if (!ret) {
1001 errno = ENOENT;
1002 return -1;
1003 }
1004 CloseHandle(pi.hThread);
1005
1006 /*
1007 * The process ID is the human-readable identifier of the process
1008 * that we want to present in log and error messages. The handle
1009 * is not useful for this purpose. But we cannot close it, either,
1010 * because it is not possible to turn a process ID into a process
1011 * handle after the process terminated.
1012 * Keep the handle in a list for waitpid.
1013 */
1014 EnterCriticalSection(&pinfo_cs);
1015 {
1016 struct pinfo_t *info = xmalloc(sizeof(struct pinfo_t));
1017 info->pid = pi.dwProcessId;
1018 info->proc = pi.hProcess;
1019 info->next = pinfo;
1020 pinfo = info;
1021 }
1022 LeaveCriticalSection(&pinfo_cs);
1023
1024 return (pid_t)pi.dwProcessId;
1025 }
1026
1027 static pid_t mingw_spawnve(const char *cmd, const char **argv, char **env,
1028 int prepend_cmd)
1029 {
1030 return mingw_spawnve_fd(cmd, argv, env, NULL, prepend_cmd, 0, 1, 2);
1031 }
1032
1033 pid_t mingw_spawnvpe(const char *cmd, const char **argv, char **env,
1034 const char *dir,
1035 int fhin, int fhout, int fherr)
1036 {
1037 pid_t pid;
1038 char **path = get_path_split();
1039 char *prog = path_lookup(cmd, path, 0);
1040
1041 if (!prog) {
1042 errno = ENOENT;
1043 pid = -1;
1044 }
1045 else {
1046 const char *interpr = parse_interpreter(prog);
1047
1048 if (interpr) {
1049 const char *argv0 = argv[0];
1050 char *iprog = path_lookup(interpr, path, 1);
1051 argv[0] = prog;
1052 if (!iprog) {
1053 errno = ENOENT;
1054 pid = -1;
1055 }
1056 else {
1057 pid = mingw_spawnve_fd(iprog, argv, env, dir, 1,
1058 fhin, fhout, fherr);
1059 free(iprog);
1060 }
1061 argv[0] = argv0;
1062 }
1063 else
1064 pid = mingw_spawnve_fd(prog, argv, env, dir, 0,
1065 fhin, fhout, fherr);
1066 free(prog);
1067 }
1068 free_path_split(path);
1069 return pid;
1070 }
1071
1072 static int try_shell_exec(const char *cmd, char *const *argv, char **env)
1073 {
1074 const char *interpr = parse_interpreter(cmd);
1075 char **path;
1076 char *prog;
1077 int pid = 0;
1078
1079 if (!interpr)
1080 return 0;
1081 path = get_path_split();
1082 prog = path_lookup(interpr, path, 1);
1083 if (prog) {
1084 int argc = 0;
1085 const char **argv2;
1086 while (argv[argc]) argc++;
1087 argv2 = xmalloc(sizeof(*argv) * (argc+1));
1088 argv2[0] = (char *)cmd; /* full path to the script file */
1089 memcpy(&argv2[1], &argv[1], sizeof(*argv) * argc);
1090 pid = mingw_spawnve(prog, argv2, env, 1);
1091 if (pid >= 0) {
1092 int status;
1093 if (waitpid(pid, &status, 0) < 0)
1094 status = 255;
1095 exit(status);
1096 }
1097 pid = 1; /* indicate that we tried but failed */
1098 free(prog);
1099 free(argv2);
1100 }
1101 free_path_split(path);
1102 return pid;
1103 }
1104
1105 static void mingw_execve(const char *cmd, char *const *argv, char *const *env)
1106 {
1107 /* check if git_command is a shell script */
1108 if (!try_shell_exec(cmd, argv, (char **)env)) {
1109 int pid, status;
1110
1111 pid = mingw_spawnve(cmd, (const char **)argv, (char **)env, 0);
1112 if (pid < 0)
1113 return;
1114 if (waitpid(pid, &status, 0) < 0)
1115 status = 255;
1116 exit(status);
1117 }
1118 }
1119
1120 int mingw_execvp(const char *cmd, char *const *argv)
1121 {
1122 char **path = get_path_split();
1123 char *prog = path_lookup(cmd, path, 0);
1124
1125 if (prog) {
1126 mingw_execve(prog, argv, environ);
1127 free(prog);
1128 } else
1129 errno = ENOENT;
1130
1131 free_path_split(path);
1132 return -1;
1133 }
1134
1135 int mingw_execv(const char *cmd, char *const *argv)
1136 {
1137 mingw_execve(cmd, argv, environ);
1138 return -1;
1139 }
1140
1141 int mingw_kill(pid_t pid, int sig)
1142 {
1143 if (pid > 0 && sig == SIGTERM) {
1144 HANDLE h = OpenProcess(PROCESS_TERMINATE, FALSE, pid);
1145
1146 if (TerminateProcess(h, -1)) {
1147 CloseHandle(h);
1148 return 0;
1149 }
1150
1151 errno = err_win_to_posix(GetLastError());
1152 CloseHandle(h);
1153 return -1;
1154 } else if (pid > 0 && sig == 0) {
1155 HANDLE h = OpenProcess(PROCESS_QUERY_INFORMATION, FALSE, pid);
1156 if (h) {
1157 CloseHandle(h);
1158 return 0;
1159 }
1160 }
1161
1162 errno = EINVAL;
1163 return -1;
1164 }
1165
1166 static char **copy_environ(void)
1167 {
1168 char **env;
1169 int i = 0;
1170 while (environ[i])
1171 i++;
1172 env = xmalloc((i+1)*sizeof(*env));
1173 for (i = 0; environ[i]; i++)
1174 env[i] = xstrdup(environ[i]);
1175 env[i] = NULL;
1176 return env;
1177 }
1178
1179 void free_environ(char **env)
1180 {
1181 int i;
1182 for (i = 0; env[i]; i++)
1183 free(env[i]);
1184 free(env);
1185 }
1186
1187 static int lookup_env(char **env, const char *name, size_t nmln)
1188 {
1189 int i;
1190
1191 for (i = 0; env[i]; i++) {
1192 if (0 == strncmp(env[i], name, nmln)
1193 && '=' == env[i][nmln])
1194 /* matches */
1195 return i;
1196 }
1197 return -1;
1198 }
1199
1200 /*
1201 * If name contains '=', then sets the variable, otherwise it unsets it
1202 */
1203 static char **env_setenv(char **env, const char *name)
1204 {
1205 char *eq = strchrnul(name, '=');
1206 int i = lookup_env(env, name, eq-name);
1207
1208 if (i < 0) {
1209 if (*eq) {
1210 for (i = 0; env[i]; i++)
1211 ;
1212 env = xrealloc(env, (i+2)*sizeof(*env));
1213 env[i] = xstrdup(name);
1214 env[i+1] = NULL;
1215 }
1216 }
1217 else {
1218 free(env[i]);
1219 if (*eq)
1220 env[i] = xstrdup(name);
1221 else
1222 for (; env[i]; i++)
1223 env[i] = env[i+1];
1224 }
1225 return env;
1226 }
1227
1228 /*
1229 * Copies global environ and adjusts variables as specified by vars.
1230 */
1231 char **make_augmented_environ(const char *const *vars)
1232 {
1233 char **env = copy_environ();
1234
1235 while (*vars)
1236 env = env_setenv(env, *vars++);
1237 return env;
1238 }
1239
1240 #undef getenv
1241
1242 /*
1243 * The system's getenv looks up the name in a case-insensitive manner.
1244 * This version tries a case-sensitive lookup and falls back to
1245 * case-insensitive if nothing was found. This is necessary because,
1246 * as a prominent example, CMD sets 'Path', but not 'PATH'.
1247 * Warning: not thread-safe.
1248 */
1249 static char *getenv_cs(const char *name)
1250 {
1251 size_t len = strlen(name);
1252 int i = lookup_env(environ, name, len);
1253 if (i >= 0)
1254 return environ[i] + len + 1; /* skip past name and '=' */
1255 return getenv(name);
1256 }
1257
1258 char *mingw_getenv(const char *name)
1259 {
1260 char *result = getenv_cs(name);
1261 if (!result && !strcmp(name, "TMPDIR")) {
1262 /* on Windows it is TMP and TEMP */
1263 result = getenv_cs("TMP");
1264 if (!result)
1265 result = getenv_cs("TEMP");
1266 }
1267 return result;
1268 }
1269
1270 /*
1271 * Note, this isn't a complete replacement for getaddrinfo. It assumes
1272 * that service contains a numerical port, or that it is null. It
1273 * does a simple search using gethostbyname, and returns one IPv4 host
1274 * if one was found.
1275 */
1276 static int WSAAPI getaddrinfo_stub(const char *node, const char *service,
1277 const struct addrinfo *hints,
1278 struct addrinfo **res)
1279 {
1280 struct hostent *h = NULL;
1281 struct addrinfo *ai;
1282 struct sockaddr_in *sin;
1283
1284 if (node) {
1285 h = gethostbyname(node);
1286 if (!h)
1287 return WSAGetLastError();
1288 }
1289
1290 ai = xmalloc(sizeof(struct addrinfo));
1291 *res = ai;
1292 ai->ai_flags = 0;
1293 ai->ai_family = AF_INET;
1294 ai->ai_socktype = hints ? hints->ai_socktype : 0;
1295 switch (ai->ai_socktype) {
1296 case SOCK_STREAM:
1297 ai->ai_protocol = IPPROTO_TCP;
1298 break;
1299 case SOCK_DGRAM:
1300 ai->ai_protocol = IPPROTO_UDP;
1301 break;
1302 default:
1303 ai->ai_protocol = 0;
1304 break;
1305 }
1306 ai->ai_addrlen = sizeof(struct sockaddr_in);
1307 if (hints && (hints->ai_flags & AI_CANONNAME))
1308 ai->ai_canonname = h ? xstrdup(h->h_name) : NULL;
1309 else
1310 ai->ai_canonname = NULL;
1311
1312 sin = xmalloc(ai->ai_addrlen);
1313 memset(sin, 0, ai->ai_addrlen);
1314 sin->sin_family = AF_INET;
1315 /* Note: getaddrinfo is supposed to allow service to be a string,
1316 * which should be looked up using getservbyname. This is
1317 * currently not implemented */
1318 if (service)
1319 sin->sin_port = htons(atoi(service));
1320 if (h)
1321 sin->sin_addr = *(struct in_addr *)h->h_addr;
1322 else if (hints && (hints->ai_flags & AI_PASSIVE))
1323 sin->sin_addr.s_addr = INADDR_ANY;
1324 else
1325 sin->sin_addr.s_addr = INADDR_LOOPBACK;
1326 ai->ai_addr = (struct sockaddr *)sin;
1327 ai->ai_next = NULL;
1328 return 0;
1329 }
1330
1331 static void WSAAPI freeaddrinfo_stub(struct addrinfo *res)
1332 {
1333 free(res->ai_canonname);
1334 free(res->ai_addr);
1335 free(res);
1336 }
1337
1338 static int WSAAPI getnameinfo_stub(const struct sockaddr *sa, socklen_t salen,
1339 char *host, DWORD hostlen,
1340 char *serv, DWORD servlen, int flags)
1341 {
1342 const struct sockaddr_in *sin = (const struct sockaddr_in *)sa;
1343 if (sa->sa_family != AF_INET)
1344 return EAI_FAMILY;
1345 if (!host && !serv)
1346 return EAI_NONAME;
1347
1348 if (host && hostlen > 0) {
1349 struct hostent *ent = NULL;
1350 if (!(flags & NI_NUMERICHOST))
1351 ent = gethostbyaddr((const char *)&sin->sin_addr,
1352 sizeof(sin->sin_addr), AF_INET);
1353
1354 if (ent)
1355 snprintf(host, hostlen, "%s", ent->h_name);
1356 else if (flags & NI_NAMEREQD)
1357 return EAI_NONAME;
1358 else
1359 snprintf(host, hostlen, "%s", inet_ntoa(sin->sin_addr));
1360 }
1361
1362 if (serv && servlen > 0) {
1363 struct servent *ent = NULL;
1364 if (!(flags & NI_NUMERICSERV))
1365 ent = getservbyport(sin->sin_port,
1366 flags & NI_DGRAM ? "udp" : "tcp");
1367
1368 if (ent)
1369 snprintf(serv, servlen, "%s", ent->s_name);
1370 else
1371 snprintf(serv, servlen, "%d", ntohs(sin->sin_port));
1372 }
1373
1374 return 0;
1375 }
1376
1377 static HMODULE ipv6_dll = NULL;
1378 static void (WSAAPI *ipv6_freeaddrinfo)(struct addrinfo *res);
1379 static int (WSAAPI *ipv6_getaddrinfo)(const char *node, const char *service,
1380 const struct addrinfo *hints,
1381 struct addrinfo **res);
1382 static int (WSAAPI *ipv6_getnameinfo)(const struct sockaddr *sa, socklen_t salen,
1383 char *host, DWORD hostlen,
1384 char *serv, DWORD servlen, int flags);
1385 /*
1386 * gai_strerror is an inline function in the ws2tcpip.h header, so we
1387 * don't need to try to load that one dynamically.
1388 */
1389
1390 static void socket_cleanup(void)
1391 {
1392 WSACleanup();
1393 if (ipv6_dll)
1394 FreeLibrary(ipv6_dll);
1395 ipv6_dll = NULL;
1396 ipv6_freeaddrinfo = freeaddrinfo_stub;
1397 ipv6_getaddrinfo = getaddrinfo_stub;
1398 ipv6_getnameinfo = getnameinfo_stub;
1399 }
1400
1401 static void ensure_socket_initialization(void)
1402 {
1403 WSADATA wsa;
1404 static int initialized = 0;
1405 const char *libraries[] = { "ws2_32.dll", "wship6.dll", NULL };
1406 const char **name;
1407
1408 if (initialized)
1409 return;
1410
1411 if (WSAStartup(MAKEWORD(2,2), &wsa))
1412 die("unable to initialize winsock subsystem, error %d",
1413 WSAGetLastError());
1414
1415 for (name = libraries; *name; name++) {
1416 ipv6_dll = LoadLibrary(*name);
1417 if (!ipv6_dll)
1418 continue;
1419
1420 ipv6_freeaddrinfo = (void (WSAAPI *)(struct addrinfo *))
1421 GetProcAddress(ipv6_dll, "freeaddrinfo");
1422 ipv6_getaddrinfo = (int (WSAAPI *)(const char *, const char *,
1423 const struct addrinfo *,
1424 struct addrinfo **))
1425 GetProcAddress(ipv6_dll, "getaddrinfo");
1426 ipv6_getnameinfo = (int (WSAAPI *)(const struct sockaddr *,
1427 socklen_t, char *, DWORD,
1428 char *, DWORD, int))
1429 GetProcAddress(ipv6_dll, "getnameinfo");
1430 if (!ipv6_freeaddrinfo || !ipv6_getaddrinfo || !ipv6_getnameinfo) {
1431 FreeLibrary(ipv6_dll);
1432 ipv6_dll = NULL;
1433 } else
1434 break;
1435 }
1436 if (!ipv6_freeaddrinfo || !ipv6_getaddrinfo || !ipv6_getnameinfo) {
1437 ipv6_freeaddrinfo = freeaddrinfo_stub;
1438 ipv6_getaddrinfo = getaddrinfo_stub;
1439 ipv6_getnameinfo = getnameinfo_stub;
1440 }
1441
1442 atexit(socket_cleanup);
1443 initialized = 1;
1444 }
1445
1446 #undef gethostname
1447 int mingw_gethostname(char *name, int namelen)
1448 {
1449 ensure_socket_initialization();
1450 return gethostname(name, namelen);
1451 }
1452
1453 #undef gethostbyname
1454 struct hostent *mingw_gethostbyname(const char *host)
1455 {
1456 ensure_socket_initialization();
1457 return gethostbyname(host);
1458 }
1459
1460 void mingw_freeaddrinfo(struct addrinfo *res)
1461 {
1462 ipv6_freeaddrinfo(res);
1463 }
1464
1465 int mingw_getaddrinfo(const char *node, const char *service,
1466 const struct addrinfo *hints, struct addrinfo **res)
1467 {
1468 ensure_socket_initialization();
1469 return ipv6_getaddrinfo(node, service, hints, res);
1470 }
1471
1472 int mingw_getnameinfo(const struct sockaddr *sa, socklen_t salen,
1473 char *host, DWORD hostlen, char *serv, DWORD servlen,
1474 int flags)
1475 {
1476 ensure_socket_initialization();
1477 return ipv6_getnameinfo(sa, salen, host, hostlen, serv, servlen, flags);
1478 }
1479
1480 int mingw_socket(int domain, int type, int protocol)
1481 {
1482 int sockfd;
1483 SOCKET s;
1484
1485 ensure_socket_initialization();
1486 s = WSASocket(domain, type, protocol, NULL, 0, 0);
1487 if (s == INVALID_SOCKET) {
1488 /*
1489 * WSAGetLastError() values are regular BSD error codes
1490 * biased by WSABASEERR.
1491 * However, strerror() does not know about networking
1492 * specific errors, which are values beginning at 38 or so.
1493 * Therefore, we choose to leave the biased error code
1494 * in errno so that _if_ someone looks up the code somewhere,
1495 * then it is at least the number that are usually listed.
1496 */
1497 errno = WSAGetLastError();
1498 return -1;
1499 }
1500 /* convert into a file descriptor */
1501 if ((sockfd = _open_osfhandle(s, O_RDWR|O_BINARY)) < 0) {
1502 closesocket(s);
1503 return error("unable to make a socket file descriptor: %s",
1504 strerror(errno));
1505 }
1506 return sockfd;
1507 }
1508
1509 #undef connect
1510 int mingw_connect(int sockfd, struct sockaddr *sa, size_t sz)
1511 {
1512 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
1513 return connect(s, sa, sz);
1514 }
1515
1516 #undef bind
1517 int mingw_bind(int sockfd, struct sockaddr *sa, size_t sz)
1518 {
1519 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
1520 return bind(s, sa, sz);
1521 }
1522
1523 #undef setsockopt
1524 int mingw_setsockopt(int sockfd, int lvl, int optname, void *optval, int optlen)
1525 {
1526 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
1527 return setsockopt(s, lvl, optname, (const char*)optval, optlen);
1528 }
1529
1530 #undef shutdown
1531 int mingw_shutdown(int sockfd, int how)
1532 {
1533 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
1534 return shutdown(s, how);
1535 }
1536
1537 #undef listen
1538 int mingw_listen(int sockfd, int backlog)
1539 {
1540 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
1541 return listen(s, backlog);
1542 }
1543
1544 #undef accept
1545 int mingw_accept(int sockfd1, struct sockaddr *sa, socklen_t *sz)
1546 {
1547 int sockfd2;
1548
1549 SOCKET s1 = (SOCKET)_get_osfhandle(sockfd1);
1550 SOCKET s2 = accept(s1, sa, sz);
1551
1552 /* convert into a file descriptor */
1553 if ((sockfd2 = _open_osfhandle(s2, O_RDWR|O_BINARY)) < 0) {
1554 int err = errno;
1555 closesocket(s2);
1556 return error("unable to make a socket file descriptor: %s",
1557 strerror(err));
1558 }
1559 return sockfd2;
1560 }
1561
1562 #undef rename
1563 int mingw_rename(const char *pold, const char *pnew)
1564 {
1565 DWORD attrs, gle;
1566 int tries = 0;
1567
1568 /*
1569 * Try native rename() first to get errno right.
1570 * It is based on MoveFile(), which cannot overwrite existing files.
1571 */
1572 if (!rename(pold, pnew))
1573 return 0;
1574 if (errno != EEXIST)
1575 return -1;
1576 repeat:
1577 if (MoveFileEx(pold, pnew, MOVEFILE_REPLACE_EXISTING))
1578 return 0;
1579 /* TODO: translate more errors */
1580 gle = GetLastError();
1581 if (gle == ERROR_ACCESS_DENIED &&
1582 (attrs = GetFileAttributes(pnew)) != INVALID_FILE_ATTRIBUTES) {
1583 if (attrs & FILE_ATTRIBUTE_DIRECTORY) {
1584 errno = EISDIR;
1585 return -1;
1586 }
1587 if ((attrs & FILE_ATTRIBUTE_READONLY) &&
1588 SetFileAttributes(pnew, attrs & ~FILE_ATTRIBUTE_READONLY)) {
1589 if (MoveFileEx(pold, pnew, MOVEFILE_REPLACE_EXISTING))
1590 return 0;
1591 gle = GetLastError();
1592 /* revert file attributes on failure */
1593 SetFileAttributes(pnew, attrs);
1594 }
1595 }
1596 if (tries < ARRAY_SIZE(delay) && gle == ERROR_ACCESS_DENIED) {
1597 /*
1598 * We assume that some other process had the source or
1599 * destination file open at the wrong moment and retry.
1600 * In order to give the other process a higher chance to
1601 * complete its operation, we give up our time slice now.
1602 * If we have to retry again, we do sleep a bit.
1603 */
1604 Sleep(delay[tries]);
1605 tries++;
1606 goto repeat;
1607 }
1608 if (gle == ERROR_ACCESS_DENIED &&
1609 ask_yes_no_if_possible("Rename from '%s' to '%s' failed. "
1610 "Should I try again?", pold, pnew))
1611 goto repeat;
1612
1613 errno = EACCES;
1614 return -1;
1615 }
1616
1617 /*
1618 * Note that this doesn't return the actual pagesize, but
1619 * the allocation granularity. If future Windows specific git code
1620 * needs the real getpagesize function, we need to find another solution.
1621 */
1622 int mingw_getpagesize(void)
1623 {
1624 SYSTEM_INFO si;
1625 GetSystemInfo(&si);
1626 return si.dwAllocationGranularity;
1627 }
1628
1629 struct passwd *getpwuid(int uid)
1630 {
1631 static char user_name[100];
1632 static struct passwd p;
1633
1634 DWORD len = sizeof(user_name);
1635 if (!GetUserName(user_name, &len))
1636 return NULL;
1637 p.pw_name = user_name;
1638 p.pw_gecos = "unknown";
1639 p.pw_dir = NULL;
1640 return &p;
1641 }
1642
1643 static HANDLE timer_event;
1644 static HANDLE timer_thread;
1645 static int timer_interval;
1646 static int one_shot;
1647 static sig_handler_t timer_fn = SIG_DFL, sigint_fn = SIG_DFL;
1648
1649 /* The timer works like this:
1650 * The thread, ticktack(), is a trivial routine that most of the time
1651 * only waits to receive the signal to terminate. The main thread tells
1652 * the thread to terminate by setting the timer_event to the signalled
1653 * state.
1654 * But ticktack() interrupts the wait state after the timer's interval
1655 * length to call the signal handler.
1656 */
1657
1658 static unsigned __stdcall ticktack(void *dummy)
1659 {
1660 while (WaitForSingleObject(timer_event, timer_interval) == WAIT_TIMEOUT) {
1661 mingw_raise(SIGALRM);
1662 if (one_shot)
1663 break;
1664 }
1665 return 0;
1666 }
1667
1668 static int start_timer_thread(void)
1669 {
1670 timer_event = CreateEvent(NULL, FALSE, FALSE, NULL);
1671 if (timer_event) {
1672 timer_thread = (HANDLE) _beginthreadex(NULL, 0, ticktack, NULL, 0, NULL);
1673 if (!timer_thread )
1674 return errno = ENOMEM,
1675 error("cannot start timer thread");
1676 } else
1677 return errno = ENOMEM,
1678 error("cannot allocate resources for timer");
1679 return 0;
1680 }
1681
1682 static void stop_timer_thread(void)
1683 {
1684 if (timer_event)
1685 SetEvent(timer_event); /* tell thread to terminate */
1686 if (timer_thread) {
1687 int rc = WaitForSingleObject(timer_thread, 1000);
1688 if (rc == WAIT_TIMEOUT)
1689 error("timer thread did not terminate timely");
1690 else if (rc != WAIT_OBJECT_0)
1691 error("waiting for timer thread failed: %lu",
1692 GetLastError());
1693 CloseHandle(timer_thread);
1694 }
1695 if (timer_event)
1696 CloseHandle(timer_event);
1697 timer_event = NULL;
1698 timer_thread = NULL;
1699 }
1700
1701 static inline int is_timeval_eq(const struct timeval *i1, const struct timeval *i2)
1702 {
1703 return i1->tv_sec == i2->tv_sec && i1->tv_usec == i2->tv_usec;
1704 }
1705
1706 int setitimer(int type, struct itimerval *in, struct itimerval *out)
1707 {
1708 static const struct timeval zero;
1709 static int atexit_done;
1710
1711 if (out != NULL)
1712 return errno = EINVAL,
1713 error("setitimer param 3 != NULL not implemented");
1714 if (!is_timeval_eq(&in->it_interval, &zero) &&
1715 !is_timeval_eq(&in->it_interval, &in->it_value))
1716 return errno = EINVAL,
1717 error("setitimer: it_interval must be zero or eq it_value");
1718
1719 if (timer_thread)
1720 stop_timer_thread();
1721
1722 if (is_timeval_eq(&in->it_value, &zero) &&
1723 is_timeval_eq(&in->it_interval, &zero))
1724 return 0;
1725
1726 timer_interval = in->it_value.tv_sec * 1000 + in->it_value.tv_usec / 1000;
1727 one_shot = is_timeval_eq(&in->it_interval, &zero);
1728 if (!atexit_done) {
1729 atexit(stop_timer_thread);
1730 atexit_done = 1;
1731 }
1732 return start_timer_thread();
1733 }
1734
1735 int sigaction(int sig, struct sigaction *in, struct sigaction *out)
1736 {
1737 if (sig != SIGALRM)
1738 return errno = EINVAL,
1739 error("sigaction only implemented for SIGALRM");
1740 if (out != NULL)
1741 return errno = EINVAL,
1742 error("sigaction: param 3 != NULL not implemented");
1743
1744 timer_fn = in->sa_handler;
1745 return 0;
1746 }
1747
1748 #undef signal
1749 sig_handler_t mingw_signal(int sig, sig_handler_t handler)
1750 {
1751 sig_handler_t old;
1752
1753 switch (sig) {
1754 case SIGALRM:
1755 old = timer_fn;
1756 timer_fn = handler;
1757 break;
1758
1759 case SIGINT:
1760 old = sigint_fn;
1761 sigint_fn = handler;
1762 break;
1763
1764 default:
1765 return signal(sig, handler);
1766 }
1767
1768 return old;
1769 }
1770
1771 #undef raise
1772 int mingw_raise(int sig)
1773 {
1774 switch (sig) {
1775 case SIGALRM:
1776 if (timer_fn == SIG_DFL) {
1777 if (isatty(STDERR_FILENO))
1778 fputs("Alarm clock\n", stderr);
1779 exit(128 + SIGALRM);
1780 } else if (timer_fn != SIG_IGN)
1781 timer_fn(SIGALRM);
1782 return 0;
1783
1784 case SIGINT:
1785 if (sigint_fn == SIG_DFL)
1786 exit(128 + SIGINT);
1787 else if (sigint_fn != SIG_IGN)
1788 sigint_fn(SIGINT);
1789 return 0;
1790
1791 default:
1792 return raise(sig);
1793 }
1794 }
1795
1796
1797 static const char *make_backslash_path(const char *path)
1798 {
1799 static char buf[PATH_MAX + 1];
1800 char *c;
1801
1802 if (strlcpy(buf, path, PATH_MAX) >= PATH_MAX)
1803 die("Too long path: %.*s", 60, path);
1804
1805 for (c = buf; *c; c++) {
1806 if (*c == '/')
1807 *c = '\\';
1808 }
1809 return buf;
1810 }
1811
1812 void mingw_open_html(const char *unixpath)
1813 {
1814 const char *htmlpath = make_backslash_path(unixpath);
1815 typedef HINSTANCE (WINAPI *T)(HWND, const char *,
1816 const char *, const char *, const char *, INT);
1817 T ShellExecute;
1818 HMODULE shell32;
1819 int r;
1820
1821 shell32 = LoadLibrary("shell32.dll");
1822 if (!shell32)
1823 die("cannot load shell32.dll");
1824 ShellExecute = (T)GetProcAddress(shell32, "ShellExecuteA");
1825 if (!ShellExecute)
1826 die("cannot run browser");
1827
1828 printf("Launching default browser to display HTML ...\n");
1829 r = (int)ShellExecute(NULL, "open", htmlpath, NULL, "\\", SW_SHOWNORMAL);
1830 FreeLibrary(shell32);
1831 /* see the MSDN documentation referring to the result codes here */
1832 if (r <= 32) {
1833 die("failed to launch browser for %.*s", MAX_PATH, unixpath);
1834 }
1835 }
1836
1837 int link(const char *oldpath, const char *newpath)
1838 {
1839 typedef BOOL (WINAPI *T)(const char*, const char*, LPSECURITY_ATTRIBUTES);
1840 static T create_hard_link = NULL;
1841 if (!create_hard_link) {
1842 create_hard_link = (T) GetProcAddress(
1843 GetModuleHandle("kernel32.dll"), "CreateHardLinkA");
1844 if (!create_hard_link)
1845 create_hard_link = (T)-1;
1846 }
1847 if (create_hard_link == (T)-1) {
1848 errno = ENOSYS;
1849 return -1;
1850 }
1851 if (!create_hard_link(newpath, oldpath, NULL)) {
1852 errno = err_win_to_posix(GetLastError());
1853 return -1;
1854 }
1855 return 0;
1856 }
1857
1858 pid_t waitpid(pid_t pid, int *status, int options)
1859 {
1860 HANDLE h = OpenProcess(SYNCHRONIZE | PROCESS_QUERY_INFORMATION,
1861 FALSE, pid);
1862 if (!h) {
1863 errno = ECHILD;
1864 return -1;
1865 }
1866
1867 if (pid > 0 && options & WNOHANG) {
1868 if (WAIT_OBJECT_0 != WaitForSingleObject(h, 0)) {
1869 CloseHandle(h);
1870 return 0;
1871 }
1872 options &= ~WNOHANG;
1873 }
1874
1875 if (options == 0) {
1876 struct pinfo_t **ppinfo;
1877 if (WaitForSingleObject(h, INFINITE) != WAIT_OBJECT_0) {
1878 CloseHandle(h);
1879 return 0;
1880 }
1881
1882 if (status)
1883 GetExitCodeProcess(h, (LPDWORD)status);
1884
1885 EnterCriticalSection(&pinfo_cs);
1886
1887 ppinfo = &pinfo;
1888 while (*ppinfo) {
1889 struct pinfo_t *info = *ppinfo;
1890 if (info->pid == pid) {
1891 CloseHandle(info->proc);
1892 *ppinfo = info->next;
1893 free(info);
1894 break;
1895 }
1896 ppinfo = &info->next;
1897 }
1898
1899 LeaveCriticalSection(&pinfo_cs);
1900
1901 CloseHandle(h);
1902 return pid;
1903 }
1904 CloseHandle(h);
1905
1906 errno = EINVAL;
1907 return -1;
1908 }
1909
1910 const char *get_windows_home_directory(void)
1911 {
1912 static const char *home_directory = NULL;
1913 struct strbuf buf = STRBUF_INIT;
1914
1915 if (home_directory)
1916 return home_directory;
1917
1918 home_directory = getenv("HOME");
1919 if (home_directory && *home_directory)
1920 return home_directory;
1921
1922 strbuf_addf(&buf, "%s/%s", getenv("HOMEDRIVE"), getenv("HOMEPATH"));
1923 home_directory = strbuf_detach(&buf, NULL);
1924
1925 return home_directory;
1926 }
1927
1928 int mingw_offset_1st_component(const char *path)
1929 {
1930 int offset = 0;
1931 if (has_dos_drive_prefix(path))
1932 offset = 2;
1933
1934 /* unc paths */
1935 else if (is_dir_sep(path[0]) && is_dir_sep(path[1])) {
1936
1937 /* skip server name */
1938 char *pos = strpbrk(path + 2, "\\/");
1939 if (!pos)
1940 return 0; /* Error: malformed unc path */
1941
1942 do {
1943 pos++;
1944 } while (*pos && !is_dir_sep(*pos));
1945
1946 offset = pos - path;
1947 }
1948
1949 return offset + is_dir_sep(path[offset]);
1950 }
The MinGW fork, forked for msysGit