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Enable color output in Windows cmd.exe
[git/mingw/4msysgit.git] / compat / mingw.c
blobe2266856b8f7b065669c08598a8682dc77b06fa1
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 #undef fstat
561 int mingw_fstat(int fd, struct stat *buf)
562 {
563 HANDLE fh = (HANDLE)_get_osfhandle(fd);
564 BY_HANDLE_FILE_INFORMATION fdata;
565
566 if (fh == INVALID_HANDLE_VALUE) {
567 errno = EBADF;
568 return -1;
569 }
570 /* direct non-file handles to MS's fstat() */
571 if (GetFileType(fh) != FILE_TYPE_DISK)
572 return _fstati64(fd, buf);
573
574 if (GetFileInformationByHandle(fh, &fdata)) {
575 buf->st_ino = 0;
576 buf->st_gid = 0;
577 buf->st_uid = 0;
578 buf->st_nlink = 1;
579 buf->st_mode = file_attr_to_st_mode(fdata.dwFileAttributes);
580 buf->st_size = fdata.nFileSizeLow |
581 (((off_t)fdata.nFileSizeHigh)<<32);
582 buf->st_dev = buf->st_rdev = 0; /* not used by Git */
583 buf->st_atime = filetime_to_time_t(&(fdata.ftLastAccessTime));
584 buf->st_mtime = filetime_to_time_t(&(fdata.ftLastWriteTime));
585 buf->st_ctime = filetime_to_time_t(&(fdata.ftCreationTime));
586 return 0;
587 }
588 errno = EBADF;
589 return -1;
590 }
591
592 static inline void time_t_to_filetime(time_t t, FILETIME *ft)
593 {
594 long long winTime = t * 10000000LL + 116444736000000000LL;
595 ft->dwLowDateTime = winTime;
596 ft->dwHighDateTime = winTime >> 32;
597 }
598
599 int mingw_utime (const char *file_name, const struct utimbuf *times)
600 {
601 FILETIME mft, aft;
602 int fh, rc;
603
604 /* must have write permission */
605 DWORD attrs = GetFileAttributes(file_name);
606 if (attrs != INVALID_FILE_ATTRIBUTES &&
607 (attrs & FILE_ATTRIBUTE_READONLY)) {
608 /* ignore errors here; open() will report them */
609 SetFileAttributes(file_name, attrs & ~FILE_ATTRIBUTE_READONLY);
610 }
611
612 if ((fh = open(file_name, O_RDWR | O_BINARY)) < 0) {
613 rc = -1;
614 goto revert_attrs;
615 }
616
617 if (times) {
618 time_t_to_filetime(times->modtime, &mft);
619 time_t_to_filetime(times->actime, &aft);
620 } else {
621 GetSystemTimeAsFileTime(&mft);
622 aft = mft;
623 }
624 if (!SetFileTime((HANDLE)_get_osfhandle(fh), NULL, &aft, &mft)) {
625 errno = EINVAL;
626 rc = -1;
627 } else
628 rc = 0;
629 close(fh);
630
631 revert_attrs:
632 if (attrs != INVALID_FILE_ATTRIBUTES &&
633 (attrs & FILE_ATTRIBUTE_READONLY)) {
634 /* ignore errors again */
635 SetFileAttributes(file_name, attrs);
636 }
637 return rc;
638 }
639
640 unsigned int sleep (unsigned int seconds)
641 {
642 Sleep(seconds*1000);
643 return 0;
644 }
645
646 int mkstemp(char *template)
647 {
648 char *filename = mktemp(template);
649 if (filename == NULL)
650 return -1;
651 return open(filename, O_RDWR | O_CREAT, 0600);
652 }
653
654 int gettimeofday(struct timeval *tv, void *tz)
655 {
656 FILETIME ft;
657 long long hnsec;
658
659 GetSystemTimeAsFileTime(&ft);
660 hnsec = filetime_to_hnsec(&ft);
661 tv->tv_sec = hnsec / 10000000;
662 tv->tv_usec = (hnsec % 10000000) / 10;
663 return 0;
664 }
665
666 int pipe(int filedes[2])
667 {
668 HANDLE h[2];
669
670 /* this creates non-inheritable handles */
671 if (!CreatePipe(&h[0], &h[1], NULL, 8192)) {
672 errno = err_win_to_posix(GetLastError());
673 return -1;
674 }
675 filedes[0] = _open_osfhandle((int)h[0], O_NOINHERIT);
676 if (filedes[0] < 0) {
677 CloseHandle(h[0]);
678 CloseHandle(h[1]);
679 return -1;
680 }
681 filedes[1] = _open_osfhandle((int)h[1], O_NOINHERIT);
682 if (filedes[0] < 0) {
683 close(filedes[0]);
684 CloseHandle(h[1]);
685 return -1;
686 }
687 return 0;
688 }
689
690 struct tm *gmtime_r(const time_t *timep, struct tm *result)
691 {
692 /* gmtime() in MSVCRT.DLL is thread-safe, but not reentrant */
693 memcpy(result, gmtime(timep), sizeof(struct tm));
694 return result;
695 }
696
697 struct tm *localtime_r(const time_t *timep, struct tm *result)
698 {
699 /* localtime() in MSVCRT.DLL is thread-safe, but not reentrant */
700 memcpy(result, localtime(timep), sizeof(struct tm));
701 return result;
702 }
703
704 #undef getcwd
705 char *mingw_getcwd(char *pointer, int len)
706 {
707 int i;
708 char *ret = getcwd(pointer, len);
709 if (!ret)
710 return ret;
711 for (i = 0; pointer[i]; i++)
712 if (pointer[i] == '\\')
713 pointer[i] = '/';
714 return ret;
715 }
716
717 /*
718 * See http://msdn2.microsoft.com/en-us/library/17w5ykft(vs.71).aspx
719 * (Parsing C++ Command-Line Arguments)
720 */
721 static const char *quote_arg(const char *arg)
722 {
723 /* count chars to quote */
724 int len = 0, n = 0;
725 int force_quotes = 0;
726 char *q, *d;
727 const char *p = arg;
728 if (!*p) force_quotes = 1;
729 while (*p) {
730 if (isspace(*p) || *p == '*' || *p == '?' || *p == '{' || *p == '\'')
731 force_quotes = 1;
732 else if (*p == '"')
733 n++;
734 else if (*p == '\\') {
735 int count = 0;
736 while (*p == '\\') {
737 count++;
738 p++;
739 len++;
740 }
741 if (*p == '"')
742 n += count*2 + 1;
743 continue;
744 }
745 len++;
746 p++;
747 }
748 if (!force_quotes && n == 0)
749 return arg;
750
751 /* insert \ where necessary */
752 d = q = xmalloc(len+n+3);
753 *d++ = '"';
754 while (*arg) {
755 if (*arg == '"')
756 *d++ = '\\';
757 else if (*arg == '\\') {
758 int count = 0;
759 while (*arg == '\\') {
760 count++;
761 *d++ = *arg++;
762 }
763 if (*arg == '"') {
764 while (count-- > 0)
765 *d++ = '\\';
766 *d++ = '\\';
767 }
768 }
769 *d++ = *arg++;
770 }
771 *d++ = '"';
772 *d++ = 0;
773 return q;
774 }
775
776 static const char *parse_interpreter(const char *cmd)
777 {
778 static char buf[100];
779 char *p, *opt;
780 int n, fd;
781
782 /* don't even try a .exe */
783 n = strlen(cmd);
784 if (n >= 4 && !strcasecmp(cmd+n-4, ".exe"))
785 return NULL;
786
787 fd = open(cmd, O_RDONLY);
788 if (fd < 0)
789 return NULL;
790 n = read(fd, buf, sizeof(buf)-1);
791 close(fd);
792 if (n < 4) /* at least '#!/x' and not error */
793 return NULL;
794
795 if (buf[0] != '#' || buf[1] != '!')
796 return NULL;
797 buf[n] = '\0';
798 p = buf + strcspn(buf, "\r\n");
799 if (!*p)
800 return NULL;
801
802 *p = '\0';
803 if (!(p = strrchr(buf+2, '/')) && !(p = strrchr(buf+2, '\\')))
804 return NULL;
805 /* strip options */
806 if ((opt = strchr(p+1, ' ')))
807 *opt = '\0';
808 return p+1;
809 }
810
811 /*
812 * Splits the PATH into parts.
813 */
814 static char **get_path_split(void)
815 {
816 char *p, **path, *envpath = mingw_getenv("PATH");
817 int i, n = 0;
818
819 if (!envpath || !*envpath)
820 return NULL;
821
822 envpath = xstrdup(envpath);
823 p = envpath;
824 while (p) {
825 char *dir = p;
826 p = strchr(p, ';');
827 if (p) *p++ = '\0';
828 if (*dir) { /* not earlier, catches series of ; */
829 ++n;
830 }
831 }
832 if (!n)
833 return NULL;
834
835 path = xmalloc((n+1)*sizeof(char *));
836 p = envpath;
837 i = 0;
838 do {
839 if (*p)
840 path[i++] = xstrdup(p);
841 p = p+strlen(p)+1;
842 } while (i < n);
843 path[i] = NULL;
844
845 free(envpath);
846
847 return path;
848 }
849
850 static void free_path_split(char **path)
851 {
852 char **p = path;
853
854 if (!path)
855 return;
856
857 while (*p)
858 free(*p++);
859 free(path);
860 }
861
862 /*
863 * exe_only means that we only want to detect .exe files, but not scripts
864 * (which do not have an extension)
865 */
866 static char *lookup_prog(const char *dir, const char *cmd, int isexe, int exe_only)
867 {
868 char path[MAX_PATH];
869 snprintf(path, sizeof(path), "%s\\%s.exe", dir, cmd);
870
871 if (!isexe && access(path, F_OK) == 0)
872 return xstrdup(path);
873 path[strlen(path)-4] = '\0';
874 if ((!exe_only || isexe) && access(path, F_OK) == 0)
875 if (!(GetFileAttributes(path) & FILE_ATTRIBUTE_DIRECTORY))
876 return xstrdup(path);
877 return NULL;
878 }
879
880 /*
881 * Determines the absolute path of cmd using the split path in path.
882 * If cmd contains a slash or backslash, no lookup is performed.
883 */
884 static char *path_lookup(const char *cmd, char **path, int exe_only)
885 {
886 char *prog = NULL;
887 int len = strlen(cmd);
888 int isexe = len >= 4 && !strcasecmp(cmd+len-4, ".exe");
889
890 if (strchr(cmd, '/') || strchr(cmd, '\\'))
891 prog = xstrdup(cmd);
892
893 while (!prog && *path)
894 prog = lookup_prog(*path++, cmd, isexe, exe_only);
895
896 return prog;
897 }
898
899 static int env_compare(const void *a, const void *b)
900 {
901 char *const *ea = a;
902 char *const *eb = b;
903 return strcasecmp(*ea, *eb);
904 }
905
906 struct pinfo_t {
907 struct pinfo_t *next;
908 pid_t pid;
909 HANDLE proc;
910 };
911 static struct pinfo_t *pinfo = NULL;
912 CRITICAL_SECTION pinfo_cs;
913
914 static pid_t mingw_spawnve_fd(const char *cmd, const char **argv, char **env,
915 const char *dir,
916 int prepend_cmd, int fhin, int fhout, int fherr)
917 {
918 STARTUPINFO si;
919 PROCESS_INFORMATION pi;
920 struct strbuf envblk, args;
921 unsigned flags;
922 BOOL ret;
923
924 /* Determine whether or not we are associated to a console */
925 HANDLE cons = CreateFile("CONOUT$", GENERIC_WRITE,
926 FILE_SHARE_WRITE, NULL, OPEN_EXISTING,
927 FILE_ATTRIBUTE_NORMAL, NULL);
928 if (cons == INVALID_HANDLE_VALUE) {
929 /* There is no console associated with this process.
930 * Since the child is a console process, Windows
931 * would normally create a console window. But
932 * since we'll be redirecting std streams, we do
933 * not need the console.
934 * It is necessary to use DETACHED_PROCESS
935 * instead of CREATE_NO_WINDOW to make ssh
936 * recognize that it has no console.
937 */
938 flags = DETACHED_PROCESS;
939 } else {
940 /* There is already a console. If we specified
941 * DETACHED_PROCESS here, too, Windows would
942 * disassociate the child from the console.
943 * The same is true for CREATE_NO_WINDOW.
944 * Go figure!
945 */
946 flags = 0;
947 CloseHandle(cons);
948 }
949 memset(&si, 0, sizeof(si));
950 si.cb = sizeof(si);
951 si.dwFlags = STARTF_USESTDHANDLES;
952 si.hStdInput = (HANDLE) _get_osfhandle(fhin);
953 si.hStdOutput = (HANDLE) _get_osfhandle(fhout);
954 si.hStdError = (HANDLE) _get_osfhandle(fherr);
955
956 /* concatenate argv, quoting args as we go */
957 strbuf_init(&args, 0);
958 if (prepend_cmd) {
959 char *quoted = (char *)quote_arg(cmd);
960 strbuf_addstr(&args, quoted);
961 if (quoted != cmd)
962 free(quoted);
963 }
964 for (; *argv; argv++) {
965 char *quoted = (char *)quote_arg(*argv);
966 if (*args.buf)
967 strbuf_addch(&args, ' ');
968 strbuf_addstr(&args, quoted);
969 if (quoted != *argv)
970 free(quoted);
971 }
972
973 if (env) {
974 int count = 0;
975 char **e, **sorted_env;
976
977 for (e = env; *e; e++)
978 count++;
979
980 /* environment must be sorted */
981 sorted_env = xmalloc(sizeof(*sorted_env) * (count + 1));
982 memcpy(sorted_env, env, sizeof(*sorted_env) * (count + 1));
983 qsort(sorted_env, count, sizeof(*sorted_env), env_compare);
984
985 strbuf_init(&envblk, 0);
986 for (e = sorted_env; *e; e++) {
987 strbuf_addstr(&envblk, *e);
988 strbuf_addch(&envblk, '\0');
989 }
990 free(sorted_env);
991 }
992
993 memset(&pi, 0, sizeof(pi));
994 ret = CreateProcess(cmd, args.buf, NULL, NULL, TRUE, flags,
995 env ? envblk.buf : NULL, dir, &si, &pi);
996
997 if (env)
998 strbuf_release(&envblk);
999 strbuf_release(&args);
1000
1001 if (!ret) {
1002 errno = ENOENT;
1003 return -1;
1004 }
1005 CloseHandle(pi.hThread);
1006
1007 /*
1008 * The process ID is the human-readable identifier of the process
1009 * that we want to present in log and error messages. The handle
1010 * is not useful for this purpose. But we cannot close it, either,
1011 * because it is not possible to turn a process ID into a process
1012 * handle after the process terminated.
1013 * Keep the handle in a list for waitpid.
1014 */
1015 EnterCriticalSection(&pinfo_cs);
1016 {
1017 struct pinfo_t *info = xmalloc(sizeof(struct pinfo_t));
1018 info->pid = pi.dwProcessId;
1019 info->proc = pi.hProcess;
1020 info->next = pinfo;
1021 pinfo = info;
1022 }
1023 LeaveCriticalSection(&pinfo_cs);
1024
1025 return (pid_t)pi.dwProcessId;
1026 }
1027
1028 static pid_t mingw_spawnve(const char *cmd, const char **argv, char **env,
1029 int prepend_cmd)
1030 {
1031 return mingw_spawnve_fd(cmd, argv, env, NULL, prepend_cmd, 0, 1, 2);
1032 }
1033
1034 pid_t mingw_spawnvpe(const char *cmd, const char **argv, char **env,
1035 const char *dir,
1036 int fhin, int fhout, int fherr)
1037 {
1038 pid_t pid;
1039 char **path = get_path_split();
1040 char *prog = path_lookup(cmd, path, 0);
1041
1042 if (!prog) {
1043 errno = ENOENT;
1044 pid = -1;
1045 }
1046 else {
1047 const char *interpr = parse_interpreter(prog);
1048
1049 if (interpr) {
1050 const char *argv0 = argv[0];
1051 char *iprog = path_lookup(interpr, path, 1);
1052 argv[0] = prog;
1053 if (!iprog) {
1054 errno = ENOENT;
1055 pid = -1;
1056 }
1057 else {
1058 pid = mingw_spawnve_fd(iprog, argv, env, dir, 1,
1059 fhin, fhout, fherr);
1060 free(iprog);
1061 }
1062 argv[0] = argv0;
1063 }
1064 else
1065 pid = mingw_spawnve_fd(prog, argv, env, dir, 0,
1066 fhin, fhout, fherr);
1067 free(prog);
1068 }
1069 free_path_split(path);
1070 return pid;
1071 }
1072
1073 static int try_shell_exec(const char *cmd, char *const *argv, char **env)
1074 {
1075 const char *interpr = parse_interpreter(cmd);
1076 char **path;
1077 char *prog;
1078 int pid = 0;
1079
1080 if (!interpr)
1081 return 0;
1082 path = get_path_split();
1083 prog = path_lookup(interpr, path, 1);
1084 if (prog) {
1085 int argc = 0;
1086 const char **argv2;
1087 while (argv[argc]) argc++;
1088 argv2 = xmalloc(sizeof(*argv) * (argc+1));
1089 argv2[0] = (char *)cmd; /* full path to the script file */
1090 memcpy(&argv2[1], &argv[1], sizeof(*argv) * argc);
1091 pid = mingw_spawnve(prog, argv2, env, 1);
1092 if (pid >= 0) {
1093 int status;
1094 if (waitpid(pid, &status, 0) < 0)
1095 status = 255;
1096 exit(status);
1097 }
1098 pid = 1; /* indicate that we tried but failed */
1099 free(prog);
1100 free(argv2);
1101 }
1102 free_path_split(path);
1103 return pid;
1104 }
1105
1106 static void mingw_execve(const char *cmd, char *const *argv, char *const *env)
1107 {
1108 /* check if git_command is a shell script */
1109 if (!try_shell_exec(cmd, argv, (char **)env)) {
1110 int pid, status;
1111
1112 pid = mingw_spawnve(cmd, (const char **)argv, (char **)env, 0);
1113 if (pid < 0)
1114 return;
1115 if (waitpid(pid, &status, 0) < 0)
1116 status = 255;
1117 exit(status);
1118 }
1119 }
1120
1121 int mingw_execvp(const char *cmd, char *const *argv)
1122 {
1123 char **path = get_path_split();
1124 char *prog = path_lookup(cmd, path, 0);
1125
1126 if (prog) {
1127 mingw_execve(prog, argv, environ);
1128 free(prog);
1129 } else
1130 errno = ENOENT;
1131
1132 free_path_split(path);
1133 return -1;
1134 }
1135
1136 int mingw_execv(const char *cmd, char *const *argv)
1137 {
1138 mingw_execve(cmd, argv, environ);
1139 return -1;
1140 }
1141
1142 int mingw_kill(pid_t pid, int sig)
1143 {
1144 if (pid > 0 && sig == SIGTERM) {
1145 HANDLE h = OpenProcess(PROCESS_TERMINATE, FALSE, pid);
1146
1147 if (TerminateProcess(h, -1)) {
1148 CloseHandle(h);
1149 return 0;
1150 }
1151
1152 errno = err_win_to_posix(GetLastError());
1153 CloseHandle(h);
1154 return -1;
1155 }
1156
1157 errno = EINVAL;
1158 return -1;
1159 }
1160
1161 static char **copy_environ(void)
1162 {
1163 char **env;
1164 int i = 0;
1165 while (environ[i])
1166 i++;
1167 env = xmalloc((i+1)*sizeof(*env));
1168 for (i = 0; environ[i]; i++)
1169 env[i] = xstrdup(environ[i]);
1170 env[i] = NULL;
1171 return env;
1172 }
1173
1174 void free_environ(char **env)
1175 {
1176 int i;
1177 for (i = 0; env[i]; i++)
1178 free(env[i]);
1179 free(env);
1180 }
1181
1182 static int lookup_env(char **env, const char *name, size_t nmln)
1183 {
1184 int i;
1185
1186 for (i = 0; env[i]; i++) {
1187 if (0 == strncmp(env[i], name, nmln)
1188 && '=' == env[i][nmln])
1189 /* matches */
1190 return i;
1191 }
1192 return -1;
1193 }
1194
1195 /*
1196 * If name contains '=', then sets the variable, otherwise it unsets it
1197 */
1198 static char **env_setenv(char **env, const char *name)
1199 {
1200 char *eq = strchrnul(name, '=');
1201 int i = lookup_env(env, name, eq-name);
1202
1203 if (i < 0) {
1204 if (*eq) {
1205 for (i = 0; env[i]; i++)
1206 ;
1207 env = xrealloc(env, (i+2)*sizeof(*env));
1208 env[i] = xstrdup(name);
1209 env[i+1] = NULL;
1210 }
1211 }
1212 else {
1213 free(env[i]);
1214 if (*eq)
1215 env[i] = xstrdup(name);
1216 else
1217 for (; env[i]; i++)
1218 env[i] = env[i+1];
1219 }
1220 return env;
1221 }
1222
1223 /*
1224 * Copies global environ and adjusts variables as specified by vars.
1225 */
1226 char **make_augmented_environ(const char *const *vars)
1227 {
1228 char **env = copy_environ();
1229
1230 while (*vars)
1231 env = env_setenv(env, *vars++);
1232 return env;
1233 }
1234
1235 #undef getenv
1236
1237 /*
1238 * The system's getenv looks up the name in a case-insensitive manner.
1239 * This version tries a case-sensitive lookup and falls back to
1240 * case-insensitive if nothing was found. This is necessary because,
1241 * as a prominent example, CMD sets 'Path', but not 'PATH'.
1242 * Warning: not thread-safe.
1243 */
1244 static char *getenv_cs(const char *name)
1245 {
1246 size_t len = strlen(name);
1247 int i = lookup_env(environ, name, len);
1248 if (i >= 0)
1249 return environ[i] + len + 1; /* skip past name and '=' */
1250 return getenv(name);
1251 }
1252
1253 char *mingw_getenv(const char *name)
1254 {
1255 char *result = getenv_cs(name);
1256 if (!result && !strcmp(name, "TMPDIR")) {
1257 /* on Windows it is TMP and TEMP */
1258 result = getenv_cs("TMP");
1259 if (!result)
1260 result = getenv_cs("TEMP");
1261 }
1262 else if (!result && !strcmp(name, "TERM")) {
1263 /* simulate TERM to enable auto-color (see color.c) */
1264 result = "winansi";
1265 }
1266 return result;
1267 }
1268
1269 /*
1270 * Note, this isn't a complete replacement for getaddrinfo. It assumes
1271 * that service contains a numerical port, or that it is null. It
1272 * does a simple search using gethostbyname, and returns one IPv4 host
1273 * if one was found.
1274 */
1275 static int WSAAPI getaddrinfo_stub(const char *node, const char *service,
1276 const struct addrinfo *hints,
1277 struct addrinfo **res)
1278 {
1279 struct hostent *h = NULL;
1280 struct addrinfo *ai;
1281 struct sockaddr_in *sin;
1282
1283 if (node) {
1284 h = gethostbyname(node);
1285 if (!h)
1286 return WSAGetLastError();
1287 }
1288
1289 ai = xmalloc(sizeof(struct addrinfo));
1290 *res = ai;
1291 ai->ai_flags = 0;
1292 ai->ai_family = AF_INET;
1293 ai->ai_socktype = hints ? hints->ai_socktype : 0;
1294 switch (ai->ai_socktype) {
1295 case SOCK_STREAM:
1296 ai->ai_protocol = IPPROTO_TCP;
1297 break;
1298 case SOCK_DGRAM:
1299 ai->ai_protocol = IPPROTO_UDP;
1300 break;
1301 default:
1302 ai->ai_protocol = 0;
1303 break;
1304 }
1305 ai->ai_addrlen = sizeof(struct sockaddr_in);
1306 if (hints && (hints->ai_flags & AI_CANONNAME))
1307 ai->ai_canonname = h ? xstrdup(h->h_name) : NULL;
1308 else
1309 ai->ai_canonname = NULL;
1310
1311 sin = xmalloc(ai->ai_addrlen);
1312 memset(sin, 0, ai->ai_addrlen);
1313 sin->sin_family = AF_INET;
1314 /* Note: getaddrinfo is supposed to allow service to be a string,
1315 * which should be looked up using getservbyname. This is
1316 * currently not implemented */
1317 if (service)
1318 sin->sin_port = htons(atoi(service));
1319 if (h)
1320 sin->sin_addr = *(struct in_addr *)h->h_addr;
1321 else if (hints && (hints->ai_flags & AI_PASSIVE))
1322 sin->sin_addr.s_addr = INADDR_ANY;
1323 else
1324 sin->sin_addr.s_addr = INADDR_LOOPBACK;
1325 ai->ai_addr = (struct sockaddr *)sin;
1326 ai->ai_next = NULL;
1327 return 0;
1328 }
1329
1330 static void WSAAPI freeaddrinfo_stub(struct addrinfo *res)
1331 {
1332 free(res->ai_canonname);
1333 free(res->ai_addr);
1334 free(res);
1335 }
1336
1337 static int WSAAPI getnameinfo_stub(const struct sockaddr *sa, socklen_t salen,
1338 char *host, DWORD hostlen,
1339 char *serv, DWORD servlen, int flags)
1340 {
1341 const struct sockaddr_in *sin = (const struct sockaddr_in *)sa;
1342 if (sa->sa_family != AF_INET)
1343 return EAI_FAMILY;
1344 if (!host && !serv)
1345 return EAI_NONAME;
1346
1347 if (host && hostlen > 0) {
1348 struct hostent *ent = NULL;
1349 if (!(flags & NI_NUMERICHOST))
1350 ent = gethostbyaddr((const char *)&sin->sin_addr,
1351 sizeof(sin->sin_addr), AF_INET);
1352
1353 if (ent)
1354 snprintf(host, hostlen, "%s", ent->h_name);
1355 else if (flags & NI_NAMEREQD)
1356 return EAI_NONAME;
1357 else
1358 snprintf(host, hostlen, "%s", inet_ntoa(sin->sin_addr));
1359 }
1360
1361 if (serv && servlen > 0) {
1362 struct servent *ent = NULL;
1363 if (!(flags & NI_NUMERICSERV))
1364 ent = getservbyport(sin->sin_port,
1365 flags & NI_DGRAM ? "udp" : "tcp");
1366
1367 if (ent)
1368 snprintf(serv, servlen, "%s", ent->s_name);
1369 else
1370 snprintf(serv, servlen, "%d", ntohs(sin->sin_port));
1371 }
1372
1373 return 0;
1374 }
1375
1376 static HMODULE ipv6_dll = NULL;
1377 static void (WSAAPI *ipv6_freeaddrinfo)(struct addrinfo *res);
1378 static int (WSAAPI *ipv6_getaddrinfo)(const char *node, const char *service,
1379 const struct addrinfo *hints,
1380 struct addrinfo **res);
1381 static int (WSAAPI *ipv6_getnameinfo)(const struct sockaddr *sa, socklen_t salen,
1382 char *host, DWORD hostlen,
1383 char *serv, DWORD servlen, int flags);
1384 /*
1385 * gai_strerror is an inline function in the ws2tcpip.h header, so we
1386 * don't need to try to load that one dynamically.
1387 */
1388
1389 static void socket_cleanup(void)
1390 {
1391 WSACleanup();
1392 if (ipv6_dll)
1393 FreeLibrary(ipv6_dll);
1394 ipv6_dll = NULL;
1395 ipv6_freeaddrinfo = freeaddrinfo_stub;
1396 ipv6_getaddrinfo = getaddrinfo_stub;
1397 ipv6_getnameinfo = getnameinfo_stub;
1398 }
1399
1400 static void ensure_socket_initialization(void)
1401 {
1402 WSADATA wsa;
1403 static int initialized = 0;
1404 const char *libraries[] = { "ws2_32.dll", "wship6.dll", NULL };
1405 const char **name;
1406
1407 if (initialized)
1408 return;
1409
1410 if (WSAStartup(MAKEWORD(2,2), &wsa))
1411 die("unable to initialize winsock subsystem, error %d",
1412 WSAGetLastError());
1413
1414 for (name = libraries; *name; name++) {
1415 ipv6_dll = LoadLibrary(*name);
1416 if (!ipv6_dll)
1417 continue;
1418
1419 ipv6_freeaddrinfo = (void (WSAAPI *)(struct addrinfo *))
1420 GetProcAddress(ipv6_dll, "freeaddrinfo");
1421 ipv6_getaddrinfo = (int (WSAAPI *)(const char *, const char *,
1422 const struct addrinfo *,
1423 struct addrinfo **))
1424 GetProcAddress(ipv6_dll, "getaddrinfo");
1425 ipv6_getnameinfo = (int (WSAAPI *)(const struct sockaddr *,
1426 socklen_t, char *, DWORD,
1427 char *, DWORD, int))
1428 GetProcAddress(ipv6_dll, "getnameinfo");
1429 if (!ipv6_freeaddrinfo || !ipv6_getaddrinfo || !ipv6_getnameinfo) {
1430 FreeLibrary(ipv6_dll);
1431 ipv6_dll = NULL;
1432 } else
1433 break;
1434 }
1435 if (!ipv6_freeaddrinfo || !ipv6_getaddrinfo || !ipv6_getnameinfo) {
1436 ipv6_freeaddrinfo = freeaddrinfo_stub;
1437 ipv6_getaddrinfo = getaddrinfo_stub;
1438 ipv6_getnameinfo = getnameinfo_stub;
1439 }
1440
1441 atexit(socket_cleanup);
1442 initialized = 1;
1443 }
1444
1445 #undef gethostname
1446 int mingw_gethostname(char *name, int namelen)
1447 {
1448 ensure_socket_initialization();
1449 return gethostname(name, namelen);
1450 }
1451
1452 #undef gethostbyname
1453 struct hostent *mingw_gethostbyname(const char *host)
1454 {
1455 ensure_socket_initialization();
1456 return gethostbyname(host);
1457 }
1458
1459 void mingw_freeaddrinfo(struct addrinfo *res)
1460 {
1461 ipv6_freeaddrinfo(res);
1462 }
1463
1464 int mingw_getaddrinfo(const char *node, const char *service,
1465 const struct addrinfo *hints, struct addrinfo **res)
1466 {
1467 ensure_socket_initialization();
1468 return ipv6_getaddrinfo(node, service, hints, res);
1469 }
1470
1471 int mingw_getnameinfo(const struct sockaddr *sa, socklen_t salen,
1472 char *host, DWORD hostlen, char *serv, DWORD servlen,
1473 int flags)
1474 {
1475 ensure_socket_initialization();
1476 return ipv6_getnameinfo(sa, salen, host, hostlen, serv, servlen, flags);
1477 }
1478
1479 int mingw_socket(int domain, int type, int protocol)
1480 {
1481 int sockfd;
1482 SOCKET s;
1483
1484 ensure_socket_initialization();
1485 s = WSASocket(domain, type, protocol, NULL, 0, 0);
1486 if (s == INVALID_SOCKET) {
1487 /*
1488 * WSAGetLastError() values are regular BSD error codes
1489 * biased by WSABASEERR.
1490 * However, strerror() does not know about networking
1491 * specific errors, which are values beginning at 38 or so.
1492 * Therefore, we choose to leave the biased error code
1493 * in errno so that _if_ someone looks up the code somewhere,
1494 * then it is at least the number that are usually listed.
1495 */
1496 errno = WSAGetLastError();
1497 return -1;
1498 }
1499 /* convert into a file descriptor */
1500 if ((sockfd = _open_osfhandle(s, O_RDWR|O_BINARY)) < 0) {
1501 closesocket(s);
1502 return error("unable to make a socket file descriptor: %s",
1503 strerror(errno));
1504 }
1505 return sockfd;
1506 }
1507
1508 #undef connect
1509 int mingw_connect(int sockfd, struct sockaddr *sa, size_t sz)
1510 {
1511 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
1512 return connect(s, sa, sz);
1513 }
1514
1515 #undef bind
1516 int mingw_bind(int sockfd, struct sockaddr *sa, size_t sz)
1517 {
1518 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
1519 return bind(s, sa, sz);
1520 }
1521
1522 #undef setsockopt
1523 int mingw_setsockopt(int sockfd, int lvl, int optname, void *optval, int optlen)
1524 {
1525 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
1526 return setsockopt(s, lvl, optname, (const char*)optval, optlen);
1527 }
1528
1529 #undef shutdown
1530 int mingw_shutdown(int sockfd, int how)
1531 {
1532 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
1533 return shutdown(s, how);
1534 }
1535
1536 #undef listen
1537 int mingw_listen(int sockfd, int backlog)
1538 {
1539 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
1540 return listen(s, backlog);
1541 }
1542
1543 #undef accept
1544 int mingw_accept(int sockfd1, struct sockaddr *sa, socklen_t *sz)
1545 {
1546 int sockfd2;
1547
1548 SOCKET s1 = (SOCKET)_get_osfhandle(sockfd1);
1549 SOCKET s2 = accept(s1, sa, sz);
1550
1551 /* convert into a file descriptor */
1552 if ((sockfd2 = _open_osfhandle(s2, O_RDWR|O_BINARY)) < 0) {
1553 int err = errno;
1554 closesocket(s2);
1555 return error("unable to make a socket file descriptor: %s",
1556 strerror(err));
1557 }
1558 return sockfd2;
1559 }
1560
1561 #undef rename
1562 int mingw_rename(const char *pold, const char *pnew)
1563 {
1564 DWORD attrs, gle;
1565 int tries = 0;
1566
1567 /*
1568 * Try native rename() first to get errno right.
1569 * It is based on MoveFile(), which cannot overwrite existing files.
1570 */
1571 if (!rename(pold, pnew))
1572 return 0;
1573 if (errno != EEXIST)
1574 return -1;
1575 repeat:
1576 if (MoveFileEx(pold, pnew, MOVEFILE_REPLACE_EXISTING))
1577 return 0;
1578 /* TODO: translate more errors */
1579 gle = GetLastError();
1580 if (gle == ERROR_ACCESS_DENIED &&
1581 (attrs = GetFileAttributes(pnew)) != INVALID_FILE_ATTRIBUTES) {
1582 if (attrs & FILE_ATTRIBUTE_DIRECTORY) {
1583 errno = EISDIR;
1584 return -1;
1585 }
1586 if ((attrs & FILE_ATTRIBUTE_READONLY) &&
1587 SetFileAttributes(pnew, attrs & ~FILE_ATTRIBUTE_READONLY)) {
1588 if (MoveFileEx(pold, pnew, MOVEFILE_REPLACE_EXISTING))
1589 return 0;
1590 gle = GetLastError();
1591 /* revert file attributes on failure */
1592 SetFileAttributes(pnew, attrs);
1593 }
1594 }
1595 if (tries < ARRAY_SIZE(delay) && gle == ERROR_ACCESS_DENIED) {
1596 /*
1597 * We assume that some other process had the source or
1598 * destination file open at the wrong moment and retry.
1599 * In order to give the other process a higher chance to
1600 * complete its operation, we give up our time slice now.
1601 * If we have to retry again, we do sleep a bit.
1602 */
1603 Sleep(delay[tries]);
1604 tries++;
1605 goto repeat;
1606 }
1607 if (gle == ERROR_ACCESS_DENIED &&
1608 ask_yes_no_if_possible("Rename from '%s' to '%s' failed. "
1609 "Should I try again?", pold, pnew))
1610 goto repeat;
1611
1612 errno = EACCES;
1613 return -1;
1614 }
1615
1616 /*
1617 * Note that this doesn't return the actual pagesize, but
1618 * the allocation granularity. If future Windows specific git code
1619 * needs the real getpagesize function, we need to find another solution.
1620 */
1621 int mingw_getpagesize(void)
1622 {
1623 SYSTEM_INFO si;
1624 GetSystemInfo(&si);
1625 return si.dwAllocationGranularity;
1626 }
1627
1628 struct passwd *getpwuid(int uid)
1629 {
1630 static char user_name[100];
1631 static struct passwd p;
1632
1633 DWORD len = sizeof(user_name);
1634 if (!GetUserName(user_name, &len))
1635 return NULL;
1636 p.pw_name = user_name;
1637 p.pw_gecos = "unknown";
1638 p.pw_dir = NULL;
1639 return &p;
1640 }
1641
1642 static HANDLE timer_event;
1643 static HANDLE timer_thread;
1644 static int timer_interval;
1645 static int one_shot;
1646 static sig_handler_t timer_fn = SIG_DFL, sigint_fn = SIG_DFL;
1647
1648 /* The timer works like this:
1649 * The thread, ticktack(), is a trivial routine that most of the time
1650 * only waits to receive the signal to terminate. The main thread tells
1651 * the thread to terminate by setting the timer_event to the signalled
1652 * state.
1653 * But ticktack() interrupts the wait state after the timer's interval
1654 * length to call the signal handler.
1655 */
1656
1657 static unsigned __stdcall ticktack(void *dummy)
1658 {
1659 while (WaitForSingleObject(timer_event, timer_interval) == WAIT_TIMEOUT) {
1660 mingw_raise(SIGALRM);
1661 if (one_shot)
1662 break;
1663 }
1664 return 0;
1665 }
1666
1667 static int start_timer_thread(void)
1668 {
1669 timer_event = CreateEvent(NULL, FALSE, FALSE, NULL);
1670 if (timer_event) {
1671 timer_thread = (HANDLE) _beginthreadex(NULL, 0, ticktack, NULL, 0, NULL);
1672 if (!timer_thread )
1673 return errno = ENOMEM,
1674 error("cannot start timer thread");
1675 } else
1676 return errno = ENOMEM,
1677 error("cannot allocate resources for timer");
1678 return 0;
1679 }
1680
1681 static void stop_timer_thread(void)
1682 {
1683 if (timer_event)
1684 SetEvent(timer_event); /* tell thread to terminate */
1685 if (timer_thread) {
1686 int rc = WaitForSingleObject(timer_thread, 1000);
1687 if (rc == WAIT_TIMEOUT)
1688 error("timer thread did not terminate timely");
1689 else if (rc != WAIT_OBJECT_0)
1690 error("waiting for timer thread failed: %lu",
1691 GetLastError());
1692 CloseHandle(timer_thread);
1693 }
1694 if (timer_event)
1695 CloseHandle(timer_event);
1696 timer_event = NULL;
1697 timer_thread = NULL;
1698 }
1699
1700 static inline int is_timeval_eq(const struct timeval *i1, const struct timeval *i2)
1701 {
1702 return i1->tv_sec == i2->tv_sec && i1->tv_usec == i2->tv_usec;
1703 }
1704
1705 int setitimer(int type, struct itimerval *in, struct itimerval *out)
1706 {
1707 static const struct timeval zero;
1708 static int atexit_done;
1709
1710 if (out != NULL)
1711 return errno = EINVAL,
1712 error("setitimer param 3 != NULL not implemented");
1713 if (!is_timeval_eq(&in->it_interval, &zero) &&
1714 !is_timeval_eq(&in->it_interval, &in->it_value))
1715 return errno = EINVAL,
1716 error("setitimer: it_interval must be zero or eq it_value");
1717
1718 if (timer_thread)
1719 stop_timer_thread();
1720
1721 if (is_timeval_eq(&in->it_value, &zero) &&
1722 is_timeval_eq(&in->it_interval, &zero))
1723 return 0;
1724
1725 timer_interval = in->it_value.tv_sec * 1000 + in->it_value.tv_usec / 1000;
1726 one_shot = is_timeval_eq(&in->it_interval, &zero);
1727 if (!atexit_done) {
1728 atexit(stop_timer_thread);
1729 atexit_done = 1;
1730 }
1731 return start_timer_thread();
1732 }
1733
1734 int sigaction(int sig, struct sigaction *in, struct sigaction *out)
1735 {
1736 if (sig != SIGALRM)
1737 return errno = EINVAL,
1738 error("sigaction only implemented for SIGALRM");
1739 if (out != NULL)
1740 return errno = EINVAL,
1741 error("sigaction: param 3 != NULL not implemented");
1742
1743 timer_fn = in->sa_handler;
1744 return 0;
1745 }
1746
1747 #undef signal
1748 sig_handler_t mingw_signal(int sig, sig_handler_t handler)
1749 {
1750 sig_handler_t old;
1751
1752 switch (sig) {
1753 case SIGALRM:
1754 old = timer_fn;
1755 timer_fn = handler;
1756 break;
1757
1758 case SIGINT:
1759 old = sigint_fn;
1760 sigint_fn = handler;
1761 break;
1762
1763 default:
1764 return signal(sig, handler);
1765 }
1766
1767 return old;
1768 }
1769
1770 #undef raise
1771 int mingw_raise(int sig)
1772 {
1773 switch (sig) {
1774 case SIGALRM:
1775 if (timer_fn == SIG_DFL) {
1776 if (isatty(STDERR_FILENO))
1777 fputs("Alarm clock\n", stderr);
1778 exit(128 + SIGALRM);
1779 } else if (timer_fn != SIG_IGN)
1780 timer_fn(SIGALRM);
1781 return 0;
1782
1783 case SIGINT:
1784 if (sigint_fn == SIG_DFL)
1785 exit(128 + SIGINT);
1786 else if (sigint_fn != SIG_IGN)
1787 sigint_fn(SIGINT);
1788 return 0;
1789
1790 default:
1791 return raise(sig);
1792 }
1793 }
1794
1795
1796 static const char *make_backslash_path(const char *path)
1797 {
1798 static char buf[PATH_MAX + 1];
1799 char *c;
1800
1801 if (strlcpy(buf, path, PATH_MAX) >= PATH_MAX)
1802 die("Too long path: %.*s", 60, path);
1803
1804 for (c = buf; *c; c++) {
1805 if (*c == '/')
1806 *c = '\\';
1807 }
1808 return buf;
1809 }
1810
1811 void mingw_open_html(const char *unixpath)
1812 {
1813 const char *htmlpath = make_backslash_path(unixpath);
1814 typedef HINSTANCE (WINAPI *T)(HWND, const char *,
1815 const char *, const char *, const char *, INT);
1816 T ShellExecute;
1817 HMODULE shell32;
1818 int r;
1819
1820 shell32 = LoadLibrary("shell32.dll");
1821 if (!shell32)
1822 die("cannot load shell32.dll");
1823 ShellExecute = (T)GetProcAddress(shell32, "ShellExecuteA");
1824 if (!ShellExecute)
1825 die("cannot run browser");
1826
1827 printf("Launching default browser to display HTML ...\n");
1828 r = (int)ShellExecute(NULL, "open", htmlpath, NULL, "\\", SW_SHOWNORMAL);
1829 FreeLibrary(shell32);
1830 /* see the MSDN documentation referring to the result codes here */
1831 if (r <= 32) {
1832 die("failed to launch browser for %.*s", MAX_PATH, unixpath);
1833 }
1834 }
1835
1836 int link(const char *oldpath, const char *newpath)
1837 {
1838 typedef BOOL (WINAPI *T)(const char*, const char*, LPSECURITY_ATTRIBUTES);
1839 static T create_hard_link = NULL;
1840 if (!create_hard_link) {
1841 create_hard_link = (T) GetProcAddress(
1842 GetModuleHandle("kernel32.dll"), "CreateHardLinkA");
1843 if (!create_hard_link)
1844 create_hard_link = (T)-1;
1845 }
1846 if (create_hard_link == (T)-1) {
1847 errno = ENOSYS;
1848 return -1;
1849 }
1850 if (!create_hard_link(newpath, oldpath, NULL)) {
1851 errno = err_win_to_posix(GetLastError());
1852 return -1;
1853 }
1854 return 0;
1855 }
1856
1857 pid_t waitpid(pid_t pid, int *status, int options)
1858 {
1859 HANDLE h = OpenProcess(SYNCHRONIZE | PROCESS_QUERY_INFORMATION,
1860 FALSE, pid);
1861 if (!h) {
1862 errno = ECHILD;
1863 return -1;
1864 }
1865
1866 if (pid > 0 && options & WNOHANG) {
1867 if (WAIT_OBJECT_0 != WaitForSingleObject(h, 0)) {
1868 CloseHandle(h);
1869 return 0;
1870 }
1871 options &= ~WNOHANG;
1872 }
1873
1874 if (options == 0) {
1875 struct pinfo_t **ppinfo;
1876 if (WaitForSingleObject(h, INFINITE) != WAIT_OBJECT_0) {
1877 CloseHandle(h);
1878 return 0;
1879 }
1880
1881 if (status)
1882 GetExitCodeProcess(h, (LPDWORD)status);
1883
1884 EnterCriticalSection(&pinfo_cs);
1885
1886 ppinfo = &pinfo;
1887 while (*ppinfo) {
1888 struct pinfo_t *info = *ppinfo;
1889 if (info->pid == pid) {
1890 CloseHandle(info->proc);
1891 *ppinfo = info->next;
1892 free(info);
1893 break;
1894 }
1895 ppinfo = &info->next;
1896 }
1897
1898 LeaveCriticalSection(&pinfo_cs);
1899
1900 CloseHandle(h);
1901 return pid;
1902 }
1903 CloseHandle(h);
1904
1905 errno = EINVAL;
1906 return -1;
1907 }
1908
1909 const char *get_windows_home_directory(void)
1910 {
1911 static const char *home_directory = NULL;
1912 struct strbuf buf = STRBUF_INIT;
1913
1914 if (home_directory)
1915 return home_directory;
1916
1917 home_directory = getenv("HOME");
1918 if (home_directory && *home_directory)
1919 return home_directory;
1920
1921 strbuf_addf(&buf, "%s/%s", getenv("HOMEDRIVE"), getenv("HOMEPATH"));
1922 home_directory = strbuf_detach(&buf, NULL);
1923
1924 return home_directory;
1925 }
1926
1927 int mingw_offset_1st_component(const char *path)
1928 {
1929 int offset = 0;
1930 if (has_dos_drive_prefix(path))
1931 offset = 2;
1932
1933 /* unc paths */
1934 else if (is_dir_sep(path[0]) && is_dir_sep(path[1])) {
1935
1936 /* skip server name */
1937 char *pos = strpbrk(path + 2, "\\/");
1938 if (!pos)
1939 return 0; /* Error: malformed unc path */
1940
1941 do {
1942 pos++;
1943 } while (*pos && !is_dir_sep(*pos));
1944
1945 offset = pos - path;
1946 }
1947
1948 return offset + is_dir_sep(path[offset]);
1949 }
The MinGW fork, forked for msysGit