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Win32: add Unicode conversion functions
[git/dscho.git] / compat / mingw.c
blob9cd188e1700b26654ba44ba0ef993db0a8db6d80
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] = 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 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 && 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 static int make_hidden(const char *path)
284 {
285 DWORD attribs = GetFileAttributes(path);
286 if (SetFileAttributes(path, FILE_ATTRIBUTE_HIDDEN | attribs))
287 return 0;
288 errno = err_win_to_posix(GetLastError());
289 return -1;
290 }
291
292 void mingw_mark_as_git_dir(const char *dir)
293 {
294 if (hide_dotfiles != HIDE_DOTFILES_FALSE && !is_bare_repository() &&
295 make_hidden(dir))
296 warning("Failed to make '%s' hidden", dir);
297 git_config_set("core.hideDotFiles",
298 hide_dotfiles == HIDE_DOTFILES_FALSE ? "false" :
299 (hide_dotfiles == HIDE_DOTFILES_DOTGITONLY ?
300 "dotGitOnly" : "true"));
301 }
302
303 #undef mkdir
304 int mingw_mkdir(const char *path, int mode)
305 {
306 int ret = mkdir(path);
307 if (!ret && hide_dotfiles == HIDE_DOTFILES_TRUE) {
308 /*
309 * In Windows a file or dir starting with a dot is not
310 * automatically hidden. So lets mark it as hidden when
311 * such a directory is created.
312 */
313 const char *start = basename((char*)path);
314 if (*start == '.')
315 return make_hidden(path);
316 }
317 return ret;
318 }
319
320 #undef open
321 int mingw_open (const char *filename, int oflags, ...)
322 {
323 va_list args;
324 unsigned mode;
325 int fd;
326
327 va_start(args, oflags);
328 mode = va_arg(args, int);
329 va_end(args);
330
331 if (filename && !strcmp(filename, "/dev/null"))
332 filename = "nul";
333
334 fd = open(filename, oflags, mode);
335
336 if (fd < 0 && (oflags & O_CREAT) && errno == EACCES) {
337 DWORD attrs = GetFileAttributes(filename);
338 if (attrs != INVALID_FILE_ATTRIBUTES && (attrs & FILE_ATTRIBUTE_DIRECTORY))
339 errno = EISDIR;
340 }
341 if ((oflags & O_CREAT) && fd >= 0 &&
342 hide_dotfiles == HIDE_DOTFILES_TRUE) {
343 /*
344 * In Windows a file or dir starting with a dot is not
345 * automatically hidden. So lets mark it as hidden when
346 * such a file is created.
347 */
348 const char *start = basename((char*)filename);
349 if (*start == '.' && make_hidden(filename))
350 warning("Could not mark '%s' as hidden.", filename);
351 }
352 return fd;
353 }
354
355 #undef write
356 ssize_t mingw_write(int fd, const void *buf, size_t count)
357 {
358 /*
359 * While write() calls to a file on a local disk are translated
360 * into WriteFile() calls with a maximum size of 64KB on Windows
361 * XP and 256KB on Vista, no such cap is placed on writes to
362 * files over the network on Windows XP. Unfortunately, there
363 * seems to be a limit of 32MB-28KB on X64 and 64MB-32KB on x86;
364 * bigger writes fail on Windows XP.
365 * So we cap to a nice 31MB here to avoid write failures over
366 * the net without changing the number of WriteFile() calls in
367 * the local case.
368 */
369 return write(fd, buf, min(count, 31 * 1024 * 1024));
370 }
371
372 #undef fopen
373 FILE *mingw_fopen (const char *filename, const char *otype)
374 {
375 int hide = 0;
376 FILE *file;
377 if (hide_dotfiles == HIDE_DOTFILES_TRUE &&
378 basename((char*)filename)[0] == '.')
379 hide = access(filename, F_OK);
380 if (filename && !strcmp(filename, "/dev/null"))
381 filename = "nul";
382 file = fopen(filename, otype);
383 if (file && hide && make_hidden(filename))
384 warning("Could not mark '%s' as hidden.", filename);
385 return file;
386 }
387
388 #undef freopen
389 FILE *mingw_freopen (const char *filename, const char *otype, FILE *stream)
390 {
391 int hide = 0;
392 FILE *file;
393 if (hide_dotfiles == HIDE_DOTFILES_TRUE &&
394 basename((char*)filename)[0] == '.')
395 hide = access(filename, F_OK);
396 if (filename && !strcmp(filename, "/dev/null"))
397 filename = "nul";
398 file = freopen(filename, otype, stream);
399 if (file && hide && make_hidden(filename))
400 warning("Could not mark '%s' as hidden.", filename);
401 return file;
402 }
403
404 /*
405 * The unit of FILETIME is 100-nanoseconds since January 1, 1601, UTC.
406 * Returns the 100-nanoseconds ("hekto nanoseconds") since the epoch.
407 */
408 static inline long long filetime_to_hnsec(const FILETIME *ft)
409 {
410 long long winTime = ((long long)ft->dwHighDateTime << 32) + ft->dwLowDateTime;
411 /* Windows to Unix Epoch conversion */
412 return winTime - 116444736000000000LL;
413 }
414
415 static inline time_t filetime_to_time_t(const FILETIME *ft)
416 {
417 return (time_t)(filetime_to_hnsec(ft) / 10000000);
418 }
419
420 /* We keep the do_lstat code in a separate function to avoid recursion.
421 * When a path ends with a slash, the stat will fail with ENOENT. In
422 * this case, we strip the trailing slashes and stat again.
423 *
424 * If follow is true then act like stat() and report on the link
425 * target. Otherwise report on the link itself.
426 */
427 static int do_lstat(int follow, const char *file_name, struct stat *buf)
428 {
429 int err;
430 WIN32_FILE_ATTRIBUTE_DATA fdata;
431
432 if (!(err = get_file_attr(file_name, &fdata))) {
433 buf->st_ino = 0;
434 buf->st_gid = 0;
435 buf->st_uid = 0;
436 buf->st_nlink = 1;
437 buf->st_mode = file_attr_to_st_mode(fdata.dwFileAttributes);
438 buf->st_size = fdata.nFileSizeLow |
439 (((off_t)fdata.nFileSizeHigh)<<32);
440 buf->st_dev = buf->st_rdev = 0; /* not used by Git */
441 buf->st_atime = filetime_to_time_t(&(fdata.ftLastAccessTime));
442 buf->st_mtime = filetime_to_time_t(&(fdata.ftLastWriteTime));
443 buf->st_ctime = filetime_to_time_t(&(fdata.ftCreationTime));
444 if (fdata.dwFileAttributes & FILE_ATTRIBUTE_REPARSE_POINT) {
445 WIN32_FIND_DATAA findbuf;
446 HANDLE handle = FindFirstFileA(file_name, &findbuf);
447 if (handle != INVALID_HANDLE_VALUE) {
448 if ((findbuf.dwFileAttributes & FILE_ATTRIBUTE_REPARSE_POINT) &&
449 (findbuf.dwReserved0 == IO_REPARSE_TAG_SYMLINK)) {
450 if (follow) {
451 char buffer[MAXIMUM_REPARSE_DATA_BUFFER_SIZE];
452 buf->st_size = readlink(file_name, buffer, MAXIMUM_REPARSE_DATA_BUFFER_SIZE);
453 } else {
454 buf->st_mode = S_IFLNK;
455 }
456 buf->st_mode |= S_IREAD;
457 if (!(findbuf.dwFileAttributes & FILE_ATTRIBUTE_READONLY))
458 buf->st_mode |= S_IWRITE;
459 }
460 FindClose(handle);
461 }
462 }
463 return 0;
464 }
465 errno = err;
466 return -1;
467 }
468
469 /* We provide our own lstat/fstat functions, since the provided
470 * lstat/fstat functions are so slow. These stat functions are
471 * tailored for Git's usage (read: fast), and are not meant to be
472 * complete. Note that Git stat()s are redirected to mingw_lstat()
473 * too, since Windows doesn't really handle symlinks that well.
474 */
475 static int do_stat_internal(int follow, const char *file_name, struct stat *buf)
476 {
477 int namelen;
478 char alt_name[PATH_MAX];
479
480 if (!do_lstat(follow, file_name, buf))
481 return 0;
482
483 /* if file_name ended in a '/', Windows returned ENOENT;
484 * try again without trailing slashes
485 */
486 if (errno != ENOENT)
487 return -1;
488
489 namelen = strlen(file_name);
490 if (namelen && file_name[namelen-1] != '/')
491 return -1;
492 while (namelen && file_name[namelen-1] == '/')
493 --namelen;
494 if (!namelen || namelen >= PATH_MAX)
495 return -1;
496
497 memcpy(alt_name, file_name, namelen);
498 alt_name[namelen] = 0;
499 return do_lstat(follow, alt_name, buf);
500 }
501
502 int mingw_lstat(const char *file_name, struct stat *buf)
503 {
504 return do_stat_internal(0, file_name, buf);
505 }
506 int mingw_stat(const char *file_name, struct stat *buf)
507 {
508 return do_stat_internal(1, file_name, buf);
509 }
510
511 #undef fstat
512 int mingw_fstat(int fd, struct stat *buf)
513 {
514 HANDLE fh = (HANDLE)_get_osfhandle(fd);
515 BY_HANDLE_FILE_INFORMATION fdata;
516
517 if (fh == INVALID_HANDLE_VALUE) {
518 errno = EBADF;
519 return -1;
520 }
521 /* direct non-file handles to MS's fstat() */
522 if (GetFileType(fh) != FILE_TYPE_DISK)
523 return _fstati64(fd, buf);
524
525 if (GetFileInformationByHandle(fh, &fdata)) {
526 buf->st_ino = 0;
527 buf->st_gid = 0;
528 buf->st_uid = 0;
529 buf->st_nlink = 1;
530 buf->st_mode = file_attr_to_st_mode(fdata.dwFileAttributes);
531 buf->st_size = fdata.nFileSizeLow |
532 (((off_t)fdata.nFileSizeHigh)<<32);
533 buf->st_dev = buf->st_rdev = 0; /* not used by Git */
534 buf->st_atime = filetime_to_time_t(&(fdata.ftLastAccessTime));
535 buf->st_mtime = filetime_to_time_t(&(fdata.ftLastWriteTime));
536 buf->st_ctime = filetime_to_time_t(&(fdata.ftCreationTime));
537 return 0;
538 }
539 errno = EBADF;
540 return -1;
541 }
542
543 static inline void time_t_to_filetime(time_t t, FILETIME *ft)
544 {
545 long long winTime = t * 10000000LL + 116444736000000000LL;
546 ft->dwLowDateTime = winTime;
547 ft->dwHighDateTime = winTime >> 32;
548 }
549
550 int mingw_utime (const char *file_name, const struct utimbuf *times)
551 {
552 FILETIME mft, aft;
553 int fh, rc;
554
555 /* must have write permission */
556 DWORD attrs = GetFileAttributes(file_name);
557 if (attrs != INVALID_FILE_ATTRIBUTES &&
558 (attrs & FILE_ATTRIBUTE_READONLY)) {
559 /* ignore errors here; open() will report them */
560 SetFileAttributes(file_name, attrs & ~FILE_ATTRIBUTE_READONLY);
561 }
562
563 if ((fh = open(file_name, O_RDWR | O_BINARY)) < 0) {
564 rc = -1;
565 goto revert_attrs;
566 }
567
568 if (times) {
569 time_t_to_filetime(times->modtime, &mft);
570 time_t_to_filetime(times->actime, &aft);
571 } else {
572 GetSystemTimeAsFileTime(&mft);
573 aft = mft;
574 }
575 if (!SetFileTime((HANDLE)_get_osfhandle(fh), NULL, &aft, &mft)) {
576 errno = EINVAL;
577 rc = -1;
578 } else
579 rc = 0;
580 close(fh);
581
582 revert_attrs:
583 if (attrs != INVALID_FILE_ATTRIBUTES &&
584 (attrs & FILE_ATTRIBUTE_READONLY)) {
585 /* ignore errors again */
586 SetFileAttributes(file_name, attrs);
587 }
588 return rc;
589 }
590
591 unsigned int sleep (unsigned int seconds)
592 {
593 Sleep(seconds*1000);
594 return 0;
595 }
596
597 int mkstemp(char *template)
598 {
599 char *filename = mktemp(template);
600 if (filename == NULL)
601 return -1;
602 return open(filename, O_RDWR | O_CREAT, 0600);
603 }
604
605 int gettimeofday(struct timeval *tv, void *tz)
606 {
607 FILETIME ft;
608 long long hnsec;
609
610 GetSystemTimeAsFileTime(&ft);
611 hnsec = filetime_to_hnsec(&ft);
612 tv->tv_sec = hnsec / 10000000;
613 tv->tv_usec = (hnsec % 10000000) / 10;
614 return 0;
615 }
616
617 int pipe(int filedes[2])
618 {
619 HANDLE h[2];
620
621 /* this creates non-inheritable handles */
622 if (!CreatePipe(&h[0], &h[1], NULL, 8192)) {
623 errno = err_win_to_posix(GetLastError());
624 return -1;
625 }
626 filedes[0] = _open_osfhandle((int)h[0], O_NOINHERIT);
627 if (filedes[0] < 0) {
628 CloseHandle(h[0]);
629 CloseHandle(h[1]);
630 return -1;
631 }
632 filedes[1] = _open_osfhandle((int)h[1], O_NOINHERIT);
633 if (filedes[0] < 0) {
634 close(filedes[0]);
635 CloseHandle(h[1]);
636 return -1;
637 }
638 return 0;
639 }
640
641 struct tm *gmtime_r(const time_t *timep, struct tm *result)
642 {
643 /* gmtime() in MSVCRT.DLL is thread-safe, but not reentrant */
644 memcpy(result, gmtime(timep), sizeof(struct tm));
645 return result;
646 }
647
648 struct tm *localtime_r(const time_t *timep, struct tm *result)
649 {
650 /* localtime() in MSVCRT.DLL is thread-safe, but not reentrant */
651 memcpy(result, localtime(timep), sizeof(struct tm));
652 return result;
653 }
654
655 #undef getcwd
656 char *mingw_getcwd(char *pointer, int len)
657 {
658 int i;
659 char *ret = getcwd(pointer, len);
660 if (!ret)
661 return ret;
662 for (i = 0; pointer[i]; i++)
663 if (pointer[i] == '\\')
664 pointer[i] = '/';
665 return ret;
666 }
667
668 #undef getenv
669 char *mingw_getenv(const char *name)
670 {
671 char *result = getenv(name);
672 if (!result && !strcmp(name, "TMPDIR")) {
673 /* on Windows it is TMP and TEMP */
674 result = getenv("TMP");
675 if (!result)
676 result = getenv("TEMP");
677 }
678 else if (!result && !strcmp(name, "TERM")) {
679 /* simulate TERM to enable auto-color (see color.c) */
680 result = "winansi";
681 }
682 return result;
683 }
684
685 /*
686 * See http://msdn2.microsoft.com/en-us/library/17w5ykft(vs.71).aspx
687 * (Parsing C++ Command-Line Arguments)
688 */
689 static const char *quote_arg(const char *arg)
690 {
691 /* count chars to quote */
692 int len = 0, n = 0;
693 int force_quotes = 0;
694 char *q, *d;
695 const char *p = arg;
696 if (!*p) force_quotes = 1;
697 while (*p) {
698 if (isspace(*p) || *p == '*' || *p == '?' || *p == '{' || *p == '\'')
699 force_quotes = 1;
700 else if (*p == '"')
701 n++;
702 else if (*p == '\\') {
703 int count = 0;
704 while (*p == '\\') {
705 count++;
706 p++;
707 len++;
708 }
709 if (*p == '"')
710 n += count*2 + 1;
711 continue;
712 }
713 len++;
714 p++;
715 }
716 if (!force_quotes && n == 0)
717 return arg;
718
719 /* insert \ where necessary */
720 d = q = xmalloc(len+n+3);
721 *d++ = '"';
722 while (*arg) {
723 if (*arg == '"')
724 *d++ = '\\';
725 else if (*arg == '\\') {
726 int count = 0;
727 while (*arg == '\\') {
728 count++;
729 *d++ = *arg++;
730 }
731 if (*arg == '"') {
732 while (count-- > 0)
733 *d++ = '\\';
734 *d++ = '\\';
735 }
736 }
737 *d++ = *arg++;
738 }
739 *d++ = '"';
740 *d++ = 0;
741 return q;
742 }
743
744 static const char *parse_interpreter(const char *cmd)
745 {
746 static char buf[100];
747 char *p, *opt;
748 int n, fd;
749
750 /* don't even try a .exe */
751 n = strlen(cmd);
752 if (n >= 4 && !strcasecmp(cmd+n-4, ".exe"))
753 return NULL;
754
755 fd = open(cmd, O_RDONLY);
756 if (fd < 0)
757 return NULL;
758 n = read(fd, buf, sizeof(buf)-1);
759 close(fd);
760 if (n < 4) /* at least '#!/x' and not error */
761 return NULL;
762
763 if (buf[0] != '#' || buf[1] != '!')
764 return NULL;
765 buf[n] = '\0';
766 p = buf + strcspn(buf, "\r\n");
767 if (!*p)
768 return NULL;
769
770 *p = '\0';
771 if (!(p = strrchr(buf+2, '/')) && !(p = strrchr(buf+2, '\\')))
772 return NULL;
773 /* strip options */
774 if ((opt = strchr(p+1, ' ')))
775 *opt = '\0';
776 return p+1;
777 }
778
779 /*
780 * Splits the PATH into parts.
781 */
782 static char **get_path_split(void)
783 {
784 char *p, **path, *envpath = getenv("PATH");
785 int i, n = 0;
786
787 if (!envpath || !*envpath)
788 return NULL;
789
790 envpath = xstrdup(envpath);
791 p = envpath;
792 while (p) {
793 char *dir = p;
794 p = strchr(p, ';');
795 if (p) *p++ = '\0';
796 if (*dir) { /* not earlier, catches series of ; */
797 ++n;
798 }
799 }
800 if (!n)
801 return NULL;
802
803 path = xmalloc((n+1)*sizeof(char *));
804 p = envpath;
805 i = 0;
806 do {
807 if (*p)
808 path[i++] = xstrdup(p);
809 p = p+strlen(p)+1;
810 } while (i < n);
811 path[i] = NULL;
812
813 free(envpath);
814
815 return path;
816 }
817
818 static void free_path_split(char **path)
819 {
820 char **p = path;
821
822 if (!path)
823 return;
824
825 while (*p)
826 free(*p++);
827 free(path);
828 }
829
830 /*
831 * exe_only means that we only want to detect .exe files, but not scripts
832 * (which do not have an extension)
833 */
834 static char *lookup_prog(const char *dir, const char *cmd, int isexe, int exe_only)
835 {
836 char path[MAX_PATH];
837 snprintf(path, sizeof(path), "%s\\%s.exe", dir, cmd);
838
839 if (!isexe && access(path, F_OK) == 0)
840 return xstrdup(path);
841 path[strlen(path)-4] = '\0';
842 if ((!exe_only || isexe) && access(path, F_OK) == 0)
843 if (!(GetFileAttributes(path) & FILE_ATTRIBUTE_DIRECTORY))
844 return xstrdup(path);
845 return NULL;
846 }
847
848 /*
849 * Determines the absolute path of cmd using the split path in path.
850 * If cmd contains a slash or backslash, no lookup is performed.
851 */
852 static char *path_lookup(const char *cmd, char **path, int exe_only)
853 {
854 char *prog = NULL;
855 int len = strlen(cmd);
856 int isexe = len >= 4 && !strcasecmp(cmd+len-4, ".exe");
857
858 if (strchr(cmd, '/') || strchr(cmd, '\\'))
859 prog = xstrdup(cmd);
860
861 while (!prog && *path)
862 prog = lookup_prog(*path++, cmd, isexe, exe_only);
863
864 return prog;
865 }
866
867 static int env_compare(const void *a, const void *b)
868 {
869 char *const *ea = a;
870 char *const *eb = b;
871 return strcasecmp(*ea, *eb);
872 }
873
874 struct pinfo_t {
875 struct pinfo_t *next;
876 pid_t pid;
877 HANDLE proc;
878 } pinfo_t;
879 struct pinfo_t *pinfo = NULL;
880 CRITICAL_SECTION pinfo_cs;
881
882 static pid_t mingw_spawnve_fd(const char *cmd, const char **argv, char **env,
883 const char *dir,
884 int prepend_cmd, int fhin, int fhout, int fherr)
885 {
886 STARTUPINFO si;
887 PROCESS_INFORMATION pi;
888 struct strbuf envblk, args;
889 unsigned flags;
890 BOOL ret;
891
892 /* Determine whether or not we are associated to a console */
893 HANDLE cons = CreateFile("CONOUT$", GENERIC_WRITE,
894 FILE_SHARE_WRITE, NULL, OPEN_EXISTING,
895 FILE_ATTRIBUTE_NORMAL, NULL);
896 if (cons == INVALID_HANDLE_VALUE) {
897 /* There is no console associated with this process.
898 * Since the child is a console process, Windows
899 * would normally create a console window. But
900 * since we'll be redirecting std streams, we do
901 * not need the console.
902 * It is necessary to use DETACHED_PROCESS
903 * instead of CREATE_NO_WINDOW to make ssh
904 * recognize that it has no console.
905 */
906 flags = DETACHED_PROCESS;
907 } else {
908 /* There is already a console. If we specified
909 * DETACHED_PROCESS here, too, Windows would
910 * disassociate the child from the console.
911 * The same is true for CREATE_NO_WINDOW.
912 * Go figure!
913 */
914 flags = 0;
915 CloseHandle(cons);
916 }
917 memset(&si, 0, sizeof(si));
918 si.cb = sizeof(si);
919 si.dwFlags = STARTF_USESTDHANDLES;
920 si.hStdInput = winansi_get_osfhandle(fhin);
921 si.hStdOutput = winansi_get_osfhandle(fhout);
922 si.hStdError = winansi_get_osfhandle(fherr);
923
924 /* concatenate argv, quoting args as we go */
925 strbuf_init(&args, 0);
926 if (prepend_cmd) {
927 char *quoted = (char *)quote_arg(cmd);
928 strbuf_addstr(&args, quoted);
929 if (quoted != cmd)
930 free(quoted);
931 }
932 for (; *argv; argv++) {
933 char *quoted = (char *)quote_arg(*argv);
934 if (*args.buf)
935 strbuf_addch(&args, ' ');
936 strbuf_addstr(&args, quoted);
937 if (quoted != *argv)
938 free(quoted);
939 }
940
941 if (env) {
942 int count = 0;
943 char **e, **sorted_env;
944
945 for (e = env; *e; e++)
946 count++;
947
948 /* environment must be sorted */
949 sorted_env = xmalloc(sizeof(*sorted_env) * (count + 1));
950 memcpy(sorted_env, env, sizeof(*sorted_env) * (count + 1));
951 qsort(sorted_env, count, sizeof(*sorted_env), env_compare);
952
953 strbuf_init(&envblk, 0);
954 for (e = sorted_env; *e; e++) {
955 strbuf_addstr(&envblk, *e);
956 strbuf_addch(&envblk, '\0');
957 }
958 free(sorted_env);
959 }
960
961 memset(&pi, 0, sizeof(pi));
962 ret = CreateProcess(cmd, args.buf, NULL, NULL, TRUE, flags,
963 env ? envblk.buf : NULL, dir, &si, &pi);
964
965 if (env)
966 strbuf_release(&envblk);
967 strbuf_release(&args);
968
969 if (!ret) {
970 errno = ENOENT;
971 return -1;
972 }
973 CloseHandle(pi.hThread);
974
975 /*
976 * The process ID is the human-readable identifier of the process
977 * that we want to present in log and error messages. The handle
978 * is not useful for this purpose. But we cannot close it, either,
979 * because it is not possible to turn a process ID into a process
980 * handle after the process terminated.
981 * Keep the handle in a list for waitpid.
982 */
983 EnterCriticalSection(&pinfo_cs);
984 {
985 struct pinfo_t *info = xmalloc(sizeof(struct pinfo_t));
986 info->pid = pi.dwProcessId;
987 info->proc = pi.hProcess;
988 info->next = pinfo;
989 pinfo = info;
990 }
991 LeaveCriticalSection(&pinfo_cs);
992
993 return (pid_t)pi.dwProcessId;
994 }
995
996 static pid_t mingw_spawnve(const char *cmd, const char **argv, char **env,
997 int prepend_cmd)
998 {
999 return mingw_spawnve_fd(cmd, argv, env, NULL, prepend_cmd, 0, 1, 2);
1000 }
1001
1002 pid_t mingw_spawnvpe(const char *cmd, const char **argv, char **env,
1003 const char *dir,
1004 int fhin, int fhout, int fherr)
1005 {
1006 pid_t pid;
1007 char **path = get_path_split();
1008 char *prog = path_lookup(cmd, path, 0);
1009
1010 if (!prog) {
1011 errno = ENOENT;
1012 pid = -1;
1013 }
1014 else {
1015 const char *interpr = parse_interpreter(prog);
1016
1017 if (interpr) {
1018 const char *argv0 = argv[0];
1019 char *iprog = path_lookup(interpr, path, 1);
1020 argv[0] = prog;
1021 if (!iprog) {
1022 errno = ENOENT;
1023 pid = -1;
1024 }
1025 else {
1026 pid = mingw_spawnve_fd(iprog, argv, env, dir, 1,
1027 fhin, fhout, fherr);
1028 free(iprog);
1029 }
1030 argv[0] = argv0;
1031 }
1032 else
1033 pid = mingw_spawnve_fd(prog, argv, env, dir, 0,
1034 fhin, fhout, fherr);
1035 free(prog);
1036 }
1037 free_path_split(path);
1038 return pid;
1039 }
1040
1041 static int try_shell_exec(const char *cmd, char *const *argv, char **env)
1042 {
1043 const char *interpr = parse_interpreter(cmd);
1044 char **path;
1045 char *prog;
1046 int pid = 0;
1047
1048 if (!interpr)
1049 return 0;
1050 path = get_path_split();
1051 prog = path_lookup(interpr, path, 1);
1052 if (prog) {
1053 int argc = 0;
1054 const char **argv2;
1055 while (argv[argc]) argc++;
1056 argv2 = xmalloc(sizeof(*argv) * (argc+1));
1057 argv2[0] = (char *)cmd; /* full path to the script file */
1058 memcpy(&argv2[1], &argv[1], sizeof(*argv) * argc);
1059 pid = mingw_spawnve(prog, argv2, env, 1);
1060 if (pid >= 0) {
1061 int status;
1062 if (waitpid(pid, &status, 0) < 0)
1063 status = 255;
1064 exit(status);
1065 }
1066 pid = 1; /* indicate that we tried but failed */
1067 free(prog);
1068 free(argv2);
1069 }
1070 free_path_split(path);
1071 return pid;
1072 }
1073
1074 static void mingw_execve(const char *cmd, char *const *argv, char *const *env)
1075 {
1076 /* check if git_command is a shell script */
1077 if (!try_shell_exec(cmd, argv, (char **)env)) {
1078 int pid, status;
1079
1080 pid = mingw_spawnve(cmd, (const char **)argv, (char **)env, 0);
1081 if (pid < 0)
1082 return;
1083 if (waitpid(pid, &status, 0) < 0)
1084 status = 255;
1085 exit(status);
1086 }
1087 }
1088
1089 int mingw_execvp(const char *cmd, char *const *argv)
1090 {
1091 char **path = get_path_split();
1092 char *prog = path_lookup(cmd, path, 0);
1093
1094 if (prog) {
1095 mingw_execve(prog, argv, environ);
1096 free(prog);
1097 } else
1098 errno = ENOENT;
1099
1100 free_path_split(path);
1101 return -1;
1102 }
1103
1104 int mingw_execv(const char *cmd, char *const *argv)
1105 {
1106 mingw_execve(cmd, argv, environ);
1107 return -1;
1108 }
1109
1110 int mingw_kill(pid_t pid, int sig)
1111 {
1112 if (pid > 0 && sig == SIGTERM) {
1113 HANDLE h = OpenProcess(PROCESS_TERMINATE, FALSE, pid);
1114
1115 if (TerminateProcess(h, -1)) {
1116 CloseHandle(h);
1117 return 0;
1118 }
1119
1120 errno = err_win_to_posix(GetLastError());
1121 CloseHandle(h);
1122 return -1;
1123 }
1124
1125 errno = EINVAL;
1126 return -1;
1127 }
1128
1129 static char **copy_environ(void)
1130 {
1131 char **env;
1132 int i = 0;
1133 while (environ[i])
1134 i++;
1135 env = xmalloc((i+1)*sizeof(*env));
1136 for (i = 0; environ[i]; i++)
1137 env[i] = xstrdup(environ[i]);
1138 env[i] = NULL;
1139 return env;
1140 }
1141
1142 void free_environ(char **env)
1143 {
1144 int i;
1145 for (i = 0; env[i]; i++)
1146 free(env[i]);
1147 free(env);
1148 }
1149
1150 static int lookup_env(char **env, const char *name, size_t nmln)
1151 {
1152 int i;
1153
1154 for (i = 0; env[i]; i++) {
1155 if (0 == strncmp(env[i], name, nmln)
1156 && '=' == env[i][nmln])
1157 /* matches */
1158 return i;
1159 }
1160 return -1;
1161 }
1162
1163 /*
1164 * If name contains '=', then sets the variable, otherwise it unsets it
1165 */
1166 static char **env_setenv(char **env, const char *name)
1167 {
1168 char *eq = strchrnul(name, '=');
1169 int i = lookup_env(env, name, eq-name);
1170
1171 if (i < 0) {
1172 if (*eq) {
1173 for (i = 0; env[i]; i++)
1174 ;
1175 env = xrealloc(env, (i+2)*sizeof(*env));
1176 env[i] = xstrdup(name);
1177 env[i+1] = NULL;
1178 }
1179 }
1180 else {
1181 free(env[i]);
1182 if (*eq)
1183 env[i] = xstrdup(name);
1184 else
1185 for (; env[i]; i++)
1186 env[i] = env[i+1];
1187 }
1188 return env;
1189 }
1190
1191 /*
1192 * Copies global environ and adjusts variables as specified by vars.
1193 */
1194 char **make_augmented_environ(const char *const *vars)
1195 {
1196 char **env = copy_environ();
1197
1198 while (*vars)
1199 env = env_setenv(env, *vars++);
1200 return env;
1201 }
1202
1203 /*
1204 * Note, this isn't a complete replacement for getaddrinfo. It assumes
1205 * that service contains a numerical port, or that it is null. It
1206 * does a simple search using gethostbyname, and returns one IPv4 host
1207 * if one was found.
1208 */
1209 static int WSAAPI getaddrinfo_stub(const char *node, const char *service,
1210 const struct addrinfo *hints,
1211 struct addrinfo **res)
1212 {
1213 struct hostent *h = NULL;
1214 struct addrinfo *ai;
1215 struct sockaddr_in *sin;
1216
1217 if (node) {
1218 h = gethostbyname(node);
1219 if (!h)
1220 return WSAGetLastError();
1221 }
1222
1223 ai = xmalloc(sizeof(struct addrinfo));
1224 *res = ai;
1225 ai->ai_flags = 0;
1226 ai->ai_family = AF_INET;
1227 ai->ai_socktype = hints ? hints->ai_socktype : 0;
1228 switch (ai->ai_socktype) {
1229 case SOCK_STREAM:
1230 ai->ai_protocol = IPPROTO_TCP;
1231 break;
1232 case SOCK_DGRAM:
1233 ai->ai_protocol = IPPROTO_UDP;
1234 break;
1235 default:
1236 ai->ai_protocol = 0;
1237 break;
1238 }
1239 ai->ai_addrlen = sizeof(struct sockaddr_in);
1240 if (hints && (hints->ai_flags & AI_CANONNAME))
1241 ai->ai_canonname = h ? xstrdup(h->h_name) : NULL;
1242 else
1243 ai->ai_canonname = NULL;
1244
1245 sin = xmalloc(ai->ai_addrlen);
1246 memset(sin, 0, ai->ai_addrlen);
1247 sin->sin_family = AF_INET;
1248 /* Note: getaddrinfo is supposed to allow service to be a string,
1249 * which should be looked up using getservbyname. This is
1250 * currently not implemented */
1251 if (service)
1252 sin->sin_port = htons(atoi(service));
1253 if (h)
1254 sin->sin_addr = *(struct in_addr *)h->h_addr;
1255 else if (hints && (hints->ai_flags & AI_PASSIVE))
1256 sin->sin_addr.s_addr = INADDR_ANY;
1257 else
1258 sin->sin_addr.s_addr = INADDR_LOOPBACK;
1259 ai->ai_addr = (struct sockaddr *)sin;
1260 ai->ai_next = 0;
1261 return 0;
1262 }
1263
1264 static void WSAAPI freeaddrinfo_stub(struct addrinfo *res)
1265 {
1266 free(res->ai_canonname);
1267 free(res->ai_addr);
1268 free(res);
1269 }
1270
1271 static int WSAAPI getnameinfo_stub(const struct sockaddr *sa, socklen_t salen,
1272 char *host, DWORD hostlen,
1273 char *serv, DWORD servlen, int flags)
1274 {
1275 const struct sockaddr_in *sin = (const struct sockaddr_in *)sa;
1276 if (sa->sa_family != AF_INET)
1277 return EAI_FAMILY;
1278 if (!host && !serv)
1279 return EAI_NONAME;
1280
1281 if (host && hostlen > 0) {
1282 struct hostent *ent = NULL;
1283 if (!(flags & NI_NUMERICHOST))
1284 ent = gethostbyaddr((const char *)&sin->sin_addr,
1285 sizeof(sin->sin_addr), AF_INET);
1286
1287 if (ent)
1288 snprintf(host, hostlen, "%s", ent->h_name);
1289 else if (flags & NI_NAMEREQD)
1290 return EAI_NONAME;
1291 else
1292 snprintf(host, hostlen, "%s", inet_ntoa(sin->sin_addr));
1293 }
1294
1295 if (serv && servlen > 0) {
1296 struct servent *ent = NULL;
1297 if (!(flags & NI_NUMERICSERV))
1298 ent = getservbyport(sin->sin_port,
1299 flags & NI_DGRAM ? "udp" : "tcp");
1300
1301 if (ent)
1302 snprintf(serv, servlen, "%s", ent->s_name);
1303 else
1304 snprintf(serv, servlen, "%d", ntohs(sin->sin_port));
1305 }
1306
1307 return 0;
1308 }
1309
1310 static HMODULE ipv6_dll = NULL;
1311 static void (WSAAPI *ipv6_freeaddrinfo)(struct addrinfo *res);
1312 static int (WSAAPI *ipv6_getaddrinfo)(const char *node, const char *service,
1313 const struct addrinfo *hints,
1314 struct addrinfo **res);
1315 static int (WSAAPI *ipv6_getnameinfo)(const struct sockaddr *sa, socklen_t salen,
1316 char *host, DWORD hostlen,
1317 char *serv, DWORD servlen, int flags);
1318 /*
1319 * gai_strerror is an inline function in the ws2tcpip.h header, so we
1320 * don't need to try to load that one dynamically.
1321 */
1322
1323 static void socket_cleanup(void)
1324 {
1325 WSACleanup();
1326 if (ipv6_dll)
1327 FreeLibrary(ipv6_dll);
1328 ipv6_dll = NULL;
1329 ipv6_freeaddrinfo = freeaddrinfo_stub;
1330 ipv6_getaddrinfo = getaddrinfo_stub;
1331 ipv6_getnameinfo = getnameinfo_stub;
1332 }
1333
1334 static void ensure_socket_initialization(void)
1335 {
1336 WSADATA wsa;
1337 static int initialized = 0;
1338 const char *libraries[] = { "ws2_32.dll", "wship6.dll", NULL };
1339 const char **name;
1340
1341 if (initialized)
1342 return;
1343
1344 if (WSAStartup(MAKEWORD(2,2), &wsa))
1345 die("unable to initialize winsock subsystem, error %d",
1346 WSAGetLastError());
1347
1348 for (name = libraries; *name; name++) {
1349 ipv6_dll = LoadLibrary(*name);
1350 if (!ipv6_dll)
1351 continue;
1352
1353 ipv6_freeaddrinfo = (void (WSAAPI *)(struct addrinfo *))
1354 GetProcAddress(ipv6_dll, "freeaddrinfo");
1355 ipv6_getaddrinfo = (int (WSAAPI *)(const char *, const char *,
1356 const struct addrinfo *,
1357 struct addrinfo **))
1358 GetProcAddress(ipv6_dll, "getaddrinfo");
1359 ipv6_getnameinfo = (int (WSAAPI *)(const struct sockaddr *,
1360 socklen_t, char *, DWORD,
1361 char *, DWORD, int))
1362 GetProcAddress(ipv6_dll, "getnameinfo");
1363 if (!ipv6_freeaddrinfo || !ipv6_getaddrinfo || !ipv6_getnameinfo) {
1364 FreeLibrary(ipv6_dll);
1365 ipv6_dll = NULL;
1366 } else
1367 break;
1368 }
1369 if (!ipv6_freeaddrinfo || !ipv6_getaddrinfo || !ipv6_getnameinfo) {
1370 ipv6_freeaddrinfo = freeaddrinfo_stub;
1371 ipv6_getaddrinfo = getaddrinfo_stub;
1372 ipv6_getnameinfo = getnameinfo_stub;
1373 }
1374
1375 atexit(socket_cleanup);
1376 initialized = 1;
1377 }
1378
1379 #undef gethostname
1380 int mingw_gethostname(char *name, int namelen)
1381 {
1382 ensure_socket_initialization();
1383 return gethostname(name, namelen);
1384 }
1385
1386 #undef gethostbyname
1387 struct hostent *mingw_gethostbyname(const char *host)
1388 {
1389 ensure_socket_initialization();
1390 return gethostbyname(host);
1391 }
1392
1393 void mingw_freeaddrinfo(struct addrinfo *res)
1394 {
1395 ipv6_freeaddrinfo(res);
1396 }
1397
1398 int mingw_getaddrinfo(const char *node, const char *service,
1399 const struct addrinfo *hints, struct addrinfo **res)
1400 {
1401 ensure_socket_initialization();
1402 return ipv6_getaddrinfo(node, service, hints, res);
1403 }
1404
1405 int mingw_getnameinfo(const struct sockaddr *sa, socklen_t salen,
1406 char *host, DWORD hostlen, char *serv, DWORD servlen,
1407 int flags)
1408 {
1409 ensure_socket_initialization();
1410 return ipv6_getnameinfo(sa, salen, host, hostlen, serv, servlen, flags);
1411 }
1412
1413 int mingw_socket(int domain, int type, int protocol)
1414 {
1415 int sockfd;
1416 SOCKET s;
1417
1418 ensure_socket_initialization();
1419 s = WSASocket(domain, type, protocol, NULL, 0, 0);
1420 if (s == INVALID_SOCKET) {
1421 /*
1422 * WSAGetLastError() values are regular BSD error codes
1423 * biased by WSABASEERR.
1424 * However, strerror() does not know about networking
1425 * specific errors, which are values beginning at 38 or so.
1426 * Therefore, we choose to leave the biased error code
1427 * in errno so that _if_ someone looks up the code somewhere,
1428 * then it is at least the number that are usually listed.
1429 */
1430 errno = WSAGetLastError();
1431 return -1;
1432 }
1433 /* convert into a file descriptor */
1434 if ((sockfd = _open_osfhandle(s, O_RDWR|O_BINARY)) < 0) {
1435 closesocket(s);
1436 return error("unable to make a socket file descriptor: %s",
1437 strerror(errno));
1438 }
1439 return sockfd;
1440 }
1441
1442 #undef connect
1443 int mingw_connect(int sockfd, struct sockaddr *sa, size_t sz)
1444 {
1445 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
1446 return connect(s, sa, sz);
1447 }
1448
1449 #undef bind
1450 int mingw_bind(int sockfd, struct sockaddr *sa, size_t sz)
1451 {
1452 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
1453 return bind(s, sa, sz);
1454 }
1455
1456 #undef setsockopt
1457 int mingw_setsockopt(int sockfd, int lvl, int optname, void *optval, int optlen)
1458 {
1459 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
1460 return setsockopt(s, lvl, optname, (const char*)optval, optlen);
1461 }
1462
1463 #undef shutdown
1464 int mingw_shutdown(int sockfd, int how)
1465 {
1466 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
1467 return shutdown(s, how);
1468 }
1469
1470 #undef listen
1471 int mingw_listen(int sockfd, int backlog)
1472 {
1473 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
1474 return listen(s, backlog);
1475 }
1476
1477 #undef accept
1478 int mingw_accept(int sockfd1, struct sockaddr *sa, socklen_t *sz)
1479 {
1480 int sockfd2;
1481
1482 SOCKET s1 = (SOCKET)_get_osfhandle(sockfd1);
1483 SOCKET s2 = accept(s1, sa, sz);
1484
1485 /* convert into a file descriptor */
1486 if ((sockfd2 = _open_osfhandle(s2, O_RDWR|O_BINARY)) < 0) {
1487 int err = errno;
1488 closesocket(s2);
1489 return error("unable to make a socket file descriptor: %s",
1490 strerror(err));
1491 }
1492 return sockfd2;
1493 }
1494
1495 #undef rename
1496 int mingw_rename(const char *pold, const char *pnew)
1497 {
1498 DWORD attrs, gle;
1499 int tries = 0;
1500
1501 /*
1502 * Try native rename() first to get errno right.
1503 * It is based on MoveFile(), which cannot overwrite existing files.
1504 */
1505 if (!rename(pold, pnew))
1506 return 0;
1507 if (errno != EEXIST)
1508 return -1;
1509 repeat:
1510 if (MoveFileEx(pold, pnew, MOVEFILE_REPLACE_EXISTING))
1511 return 0;
1512 /* TODO: translate more errors */
1513 gle = GetLastError();
1514 if (gle == ERROR_ACCESS_DENIED &&
1515 (attrs = GetFileAttributes(pnew)) != INVALID_FILE_ATTRIBUTES) {
1516 if (attrs & FILE_ATTRIBUTE_DIRECTORY) {
1517 errno = EISDIR;
1518 return -1;
1519 }
1520 if ((attrs & FILE_ATTRIBUTE_READONLY) &&
1521 SetFileAttributes(pnew, attrs & ~FILE_ATTRIBUTE_READONLY)) {
1522 if (MoveFileEx(pold, pnew, MOVEFILE_REPLACE_EXISTING))
1523 return 0;
1524 gle = GetLastError();
1525 /* revert file attributes on failure */
1526 SetFileAttributes(pnew, attrs);
1527 }
1528 }
1529 if (tries < ARRAY_SIZE(delay) && gle == ERROR_ACCESS_DENIED) {
1530 /*
1531 * We assume that some other process had the source or
1532 * destination file open at the wrong moment and retry.
1533 * In order to give the other process a higher chance to
1534 * complete its operation, we give up our time slice now.
1535 * If we have to retry again, we do sleep a bit.
1536 */
1537 Sleep(delay[tries]);
1538 tries++;
1539 goto repeat;
1540 }
1541 if (gle == ERROR_ACCESS_DENIED &&
1542 ask_yes_no_if_possible("Rename from '%s' to '%s' failed. "
1543 "Should I try again?", pold, pnew))
1544 goto repeat;
1545
1546 errno = EACCES;
1547 return -1;
1548 }
1549
1550 /*
1551 * Note that this doesn't return the actual pagesize, but
1552 * the allocation granularity. If future Windows specific git code
1553 * needs the real getpagesize function, we need to find another solution.
1554 */
1555 int mingw_getpagesize(void)
1556 {
1557 SYSTEM_INFO si;
1558 GetSystemInfo(&si);
1559 return si.dwAllocationGranularity;
1560 }
1561
1562 struct passwd *getpwuid(int uid)
1563 {
1564 static char user_name[100];
1565 static struct passwd p;
1566
1567 DWORD len = sizeof(user_name);
1568 if (!GetUserName(user_name, &len))
1569 return NULL;
1570 p.pw_name = user_name;
1571 p.pw_gecos = "unknown";
1572 p.pw_dir = NULL;
1573 return &p;
1574 }
1575
1576 static HANDLE timer_event;
1577 static HANDLE timer_thread;
1578 static int timer_interval;
1579 static int one_shot;
1580 static sig_handler_t timer_fn = SIG_DFL;
1581
1582 /* The timer works like this:
1583 * The thread, ticktack(), is a trivial routine that most of the time
1584 * only waits to receive the signal to terminate. The main thread tells
1585 * the thread to terminate by setting the timer_event to the signalled
1586 * state.
1587 * But ticktack() interrupts the wait state after the timer's interval
1588 * length to call the signal handler.
1589 */
1590
1591 static unsigned __stdcall ticktack(void *dummy)
1592 {
1593 while (WaitForSingleObject(timer_event, timer_interval) == WAIT_TIMEOUT) {
1594 if (timer_fn == SIG_DFL)
1595 die("Alarm");
1596 if (timer_fn != SIG_IGN)
1597 timer_fn(SIGALRM);
1598 if (one_shot)
1599 break;
1600 }
1601 return 0;
1602 }
1603
1604 static int start_timer_thread(void)
1605 {
1606 timer_event = CreateEvent(NULL, FALSE, FALSE, NULL);
1607 if (timer_event) {
1608 timer_thread = (HANDLE) _beginthreadex(NULL, 0, ticktack, NULL, 0, NULL);
1609 if (!timer_thread )
1610 return errno = ENOMEM,
1611 error("cannot start timer thread");
1612 } else
1613 return errno = ENOMEM,
1614 error("cannot allocate resources for timer");
1615 return 0;
1616 }
1617
1618 static void stop_timer_thread(void)
1619 {
1620 if (timer_event)
1621 SetEvent(timer_event); /* tell thread to terminate */
1622 if (timer_thread) {
1623 int rc = WaitForSingleObject(timer_thread, 1000);
1624 if (rc == WAIT_TIMEOUT)
1625 error("timer thread did not terminate timely");
1626 else if (rc != WAIT_OBJECT_0)
1627 error("waiting for timer thread failed: %lu",
1628 GetLastError());
1629 CloseHandle(timer_thread);
1630 }
1631 if (timer_event)
1632 CloseHandle(timer_event);
1633 timer_event = NULL;
1634 timer_thread = NULL;
1635 }
1636
1637 static inline int is_timeval_eq(const struct timeval *i1, const struct timeval *i2)
1638 {
1639 return i1->tv_sec == i2->tv_sec && i1->tv_usec == i2->tv_usec;
1640 }
1641
1642 int setitimer(int type, struct itimerval *in, struct itimerval *out)
1643 {
1644 static const struct timeval zero;
1645 static int atexit_done;
1646
1647 if (out != NULL)
1648 return errno = EINVAL,
1649 error("setitimer param 3 != NULL not implemented");
1650 if (!is_timeval_eq(&in->it_interval, &zero) &&
1651 !is_timeval_eq(&in->it_interval, &in->it_value))
1652 return errno = EINVAL,
1653 error("setitimer: it_interval must be zero or eq it_value");
1654
1655 if (timer_thread)
1656 stop_timer_thread();
1657
1658 if (is_timeval_eq(&in->it_value, &zero) &&
1659 is_timeval_eq(&in->it_interval, &zero))
1660 return 0;
1661
1662 timer_interval = in->it_value.tv_sec * 1000 + in->it_value.tv_usec / 1000;
1663 one_shot = is_timeval_eq(&in->it_interval, &zero);
1664 if (!atexit_done) {
1665 atexit(stop_timer_thread);
1666 atexit_done = 1;
1667 }
1668 return start_timer_thread();
1669 }
1670
1671 int sigaction(int sig, struct sigaction *in, struct sigaction *out)
1672 {
1673 if (sig != SIGALRM)
1674 return errno = EINVAL,
1675 error("sigaction only implemented for SIGALRM");
1676 if (out != NULL)
1677 return errno = EINVAL,
1678 error("sigaction: param 3 != NULL not implemented");
1679
1680 timer_fn = in->sa_handler;
1681 return 0;
1682 }
1683
1684 #undef signal
1685 sig_handler_t mingw_signal(int sig, sig_handler_t handler)
1686 {
1687 sig_handler_t old = timer_fn;
1688 if (sig != SIGALRM)
1689 return signal(sig, handler);
1690 timer_fn = handler;
1691 return old;
1692 }
1693
1694 static const char *make_backslash_path(const char *path)
1695 {
1696 static char buf[PATH_MAX + 1];
1697 char *c;
1698
1699 if (strlcpy(buf, path, PATH_MAX) >= PATH_MAX)
1700 die("Too long path: %.*s", 60, path);
1701
1702 for (c = buf; *c; c++) {
1703 if (*c == '/')
1704 *c = '\\';
1705 }
1706 return buf;
1707 }
1708
1709 void mingw_open_html(const char *unixpath)
1710 {
1711 const char *htmlpath = make_backslash_path(unixpath);
1712 typedef HINSTANCE (WINAPI *T)(HWND, const char *,
1713 const char *, const char *, const char *, INT);
1714 T ShellExecute;
1715 HMODULE shell32;
1716 int r;
1717
1718 shell32 = LoadLibrary("shell32.dll");
1719 if (!shell32)
1720 die("cannot load shell32.dll");
1721 ShellExecute = (T)GetProcAddress(shell32, "ShellExecuteA");
1722 if (!ShellExecute)
1723 die("cannot run browser");
1724
1725 printf("Launching default browser to display HTML ...\n");
1726 r = (int)ShellExecute(NULL, "open", htmlpath, NULL, "\\", SW_SHOWNORMAL);
1727 FreeLibrary(shell32);
1728 /* see the MSDN documentation referring to the result codes here */
1729 if (r <= 32) {
1730 die("failed to launch browser for %.*s", MAX_PATH, unixpath);
1731 }
1732 }
1733
1734 int link(const char *oldpath, const char *newpath)
1735 {
1736 typedef BOOL (WINAPI *T)(const char*, const char*, LPSECURITY_ATTRIBUTES);
1737 static T create_hard_link = NULL;
1738 if (!create_hard_link) {
1739 create_hard_link = (T) GetProcAddress(
1740 GetModuleHandle("kernel32.dll"), "CreateHardLinkA");
1741 if (!create_hard_link)
1742 create_hard_link = (T)-1;
1743 }
1744 if (create_hard_link == (T)-1) {
1745 errno = ENOSYS;
1746 return -1;
1747 }
1748 if (!create_hard_link(newpath, oldpath, NULL)) {
1749 errno = err_win_to_posix(GetLastError());
1750 return -1;
1751 }
1752 return 0;
1753 }
1754
1755 char *getpass(const char *prompt)
1756 {
1757 struct strbuf buf = STRBUF_INIT;
1758
1759 fputs(prompt, stderr);
1760 for (;;) {
1761 char c = _getch();
1762 if (c == '\r' || c == '\n')
1763 break;
1764 strbuf_addch(&buf, c);
1765 }
1766 fputs("\n", stderr);
1767 return strbuf_detach(&buf, NULL);
1768 }
1769
1770 pid_t waitpid(pid_t pid, int *status, int options)
1771 {
1772 HANDLE h = OpenProcess(SYNCHRONIZE | PROCESS_QUERY_INFORMATION,
1773 FALSE, pid);
1774 if (!h) {
1775 errno = ECHILD;
1776 return -1;
1777 }
1778
1779 if (pid > 0 && options & WNOHANG) {
1780 if (WAIT_OBJECT_0 != WaitForSingleObject(h, 0)) {
1781 CloseHandle(h);
1782 return 0;
1783 }
1784 options &= ~WNOHANG;
1785 }
1786
1787 if (options == 0) {
1788 struct pinfo_t **ppinfo;
1789 if (WaitForSingleObject(h, INFINITE) != WAIT_OBJECT_0) {
1790 CloseHandle(h);
1791 return 0;
1792 }
1793
1794 if (status)
1795 GetExitCodeProcess(h, (LPDWORD)status);
1796
1797 EnterCriticalSection(&pinfo_cs);
1798
1799 ppinfo = &pinfo;
1800 while (*ppinfo) {
1801 struct pinfo_t *info = *ppinfo;
1802 if (info->pid == pid) {
1803 CloseHandle(info->proc);
1804 *ppinfo = info->next;
1805 free(info);
1806 break;
1807 }
1808 ppinfo = &info->next;
1809 }
1810
1811 LeaveCriticalSection(&pinfo_cs);
1812
1813 CloseHandle(h);
1814 return pid;
1815 }
1816 CloseHandle(h);
1817
1818 errno = EINVAL;
1819 return -1;
1820 }
1821
1822 const char *get_windows_home_directory(void)
1823 {
1824 static const char *home_directory = NULL;
1825 struct strbuf buf = STRBUF_INIT;
1826
1827 if (home_directory)
1828 return home_directory;
1829
1830 home_directory = getenv("HOME");
1831 if (home_directory && *home_directory)
1832 return home_directory;
1833
1834 strbuf_addf(&buf, "%s/%s", getenv("HOMEDRIVE"), getenv("HOMEPATH"));
1835 home_directory = strbuf_detach(&buf, NULL);
1836
1837 return home_directory;
1838 }
1839
1840 int mingw_offset_1st_component(const char *path)
1841 {
1842 int offset = 0;
1843 if (has_dos_drive_prefix(path))
1844 offset = 2;
1845
1846 /* unc paths */
1847 else if (is_dir_sep(path[0]) && is_dir_sep(path[1])) {
1848
1849 /* skip server name */
1850 char *pos = strpbrk(path + 2, "\\/");
1851 if (!pos)
1852 return 0; /* Error: malformed unc path */
1853
1854 do {
1855 pos++;
1856 } while (*pos && !is_dir_sep(*pos));
1857
1858 offset = pos - path;
1859 }
1860
1861 return offset + is_dir_sep(path[offset]);
1862 }
1863
1864 int xutftowcsn(wchar_t *wcs, const char *utfs, size_t wcslen, int utflen)
1865 {
1866 int upos = 0, wpos = 0;
1867 const unsigned char *utf = (const unsigned char*) utfs;
1868 if (!utf || !wcs || wcslen < 1) {
1869 errno = EINVAL;
1870 return -1;
1871 }
1872 /* reserve space for \0 */
1873 wcslen--;
1874 if (utflen < 0)
1875 utflen = INT_MAX;
1876
1877 while (upos < utflen) {
1878 int c = utf[upos++] & 0xff;
1879 if (utflen == INT_MAX && c == 0)
1880 break;
1881
1882 if (wpos >= wcslen) {
1883 wcs[wpos] = 0;
1884 errno = ERANGE;
1885 return -1;
1886 }
1887
1888 if (c < 0x80) {
1889 /* ASCII */
1890 wcs[wpos++] = c;
1891 } else if (c >= 0xc2 && c < 0xe0 && upos < utflen &&
1892 (utf[upos] & 0xc0) == 0x80) {
1893 /* 2-byte utf-8 */
1894 c = ((c & 0x1f) << 6);
1895 c |= (utf[upos++] & 0x3f);
1896 wcs[wpos++] = c;
1897 } else if (c >= 0xe0 && c < 0xf0 && upos + 1 < utflen &&
1898 !(c == 0xe0 && utf[upos] < 0xa0) && /* over-long encoding */
1899 (utf[upos] & 0xc0) == 0x80 &&
1900 (utf[upos + 1] & 0xc0) == 0x80) {
1901 /* 3-byte utf-8 */
1902 c = ((c & 0x0f) << 12);
1903 c |= ((utf[upos++] & 0x3f) << 6);
1904 c |= (utf[upos++] & 0x3f);
1905 wcs[wpos++] = c;
1906 } else if (c >= 0xf0 && c < 0xf5 && upos + 2 < utflen &&
1907 wpos + 1 < wcslen &&
1908 !(c == 0xf0 && utf[upos] < 0x90) && /* over-long encoding */
1909 !(c == 0xf4 && utf[upos] >= 0x90) && /* > \u10ffff */
1910 (utf[upos] & 0xc0) == 0x80 &&
1911 (utf[upos + 1] & 0xc0) == 0x80 &&
1912 (utf[upos + 2] & 0xc0) == 0x80) {
1913 /* 4-byte utf-8: convert to \ud8xx \udcxx surrogate pair */
1914 c = ((c & 0x07) << 18);
1915 c |= ((utf[upos++] & 0x3f) << 12);
1916 c |= ((utf[upos++] & 0x3f) << 6);
1917 c |= (utf[upos++] & 0x3f);
1918 c -= 0x10000;
1919 wcs[wpos++] = 0xd800 | (c >> 10);
1920 wcs[wpos++] = 0xdc00 | (c & 0x3ff);
1921 } else if (c >= 0xa0) {
1922 /* invalid utf-8 byte, printable unicode char: convert 1:1 */
1923 wcs[wpos++] = c;
1924 } else {
1925 /* invalid utf-8 byte, non-printable unicode: convert to hex */
1926 static const char *hex = "0123456789abcdef";
1927 wcs[wpos++] = hex[c >> 4];
1928 if (wpos < wcslen)
1929 wcs[wpos++] = hex[c & 0x0f];
1930 }
1931 }
1932 wcs[wpos] = 0;
1933 return wpos;
1934 }
1935
1936 int xwcstoutf(char *utf, const wchar_t *wcs, size_t utflen)
1937 {
1938 if (!wcs || !utf || utflen < 1) {
1939 errno = EINVAL;
1940 return -1;
1941 }
1942 utflen = WideCharToMultiByte(CP_UTF8, 0, wcs, -1, utf, utflen, NULL, NULL);
1943 if (utflen)
1944 return utflen - 1;
1945 errno = ERANGE;
1946 return -1;
1947 }
1948
1949 /*
1950 * Disable MSVCRT command line wildcard expansion (__getmainargs called from
1951 * mingw startup code, see init.c in mingw runtime).
1952 */
1953 int _CRT_glob = 0;
1954
1955 void mingw_startup()
1956 {
1957 /* copy executable name to argv[0] */
1958 __argv[0] = xstrdup(_pgmptr);
1959
1960 /* initialize critical section for waitpid pinfo_t list */
1961 InitializeCriticalSection(&pinfo_cs);
1962
1963 /* set up default file mode and file modes for stdin/out/err */
1964 _fmode = _O_BINARY;
1965 _setmode(_fileno(stdin), _O_BINARY);
1966 _setmode(_fileno(stdout), _O_BINARY);
1967 _setmode(_fileno(stderr), _O_BINARY);
1968
1969 /* initialize Unicode console */
1970 winansi_init();
1971 }
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