mingw: introduce the 'core.hideDotFiles' setting
[git/git.git] / compat / mingw.c
1 #include "../git-compat-util.h"
2 #include "win32.h"
3 #include <conio.h>
4 #include <wchar.h>
5 #include "../strbuf.h"
6 #include "../run-command.h"
7 #include "../cache.h"
8
9 #define HCAST(type, handle) ((type)(intptr_t)handle)
10
11 static const int delay[] = { 0, 1, 10, 20, 40 };
12
13 int err_win_to_posix(DWORD winerr)
14 {
15 int error = ENOSYS;
16 switch(winerr) {
17 case ERROR_ACCESS_DENIED: error = EACCES; break;
18 case ERROR_ACCOUNT_DISABLED: error = EACCES; break;
19 case ERROR_ACCOUNT_RESTRICTION: error = EACCES; break;
20 case ERROR_ALREADY_ASSIGNED: error = EBUSY; break;
21 case ERROR_ALREADY_EXISTS: error = EEXIST; break;
22 case ERROR_ARITHMETIC_OVERFLOW: error = ERANGE; break;
23 case ERROR_BAD_COMMAND: error = EIO; break;
24 case ERROR_BAD_DEVICE: error = ENODEV; break;
25 case ERROR_BAD_DRIVER_LEVEL: error = ENXIO; break;
26 case ERROR_BAD_EXE_FORMAT: error = ENOEXEC; break;
27 case ERROR_BAD_FORMAT: error = ENOEXEC; break;
28 case ERROR_BAD_LENGTH: error = EINVAL; break;
29 case ERROR_BAD_PATHNAME: error = ENOENT; break;
30 case ERROR_BAD_PIPE: error = EPIPE; break;
31 case ERROR_BAD_UNIT: error = ENODEV; break;
32 case ERROR_BAD_USERNAME: error = EINVAL; break;
33 case ERROR_BROKEN_PIPE: error = EPIPE; break;
34 case ERROR_BUFFER_OVERFLOW: error = ENAMETOOLONG; break;
35 case ERROR_BUSY: error = EBUSY; break;
36 case ERROR_BUSY_DRIVE: error = EBUSY; break;
37 case ERROR_CALL_NOT_IMPLEMENTED: error = ENOSYS; break;
38 case ERROR_CANNOT_MAKE: error = EACCES; break;
39 case ERROR_CANTOPEN: error = EIO; break;
40 case ERROR_CANTREAD: error = EIO; break;
41 case ERROR_CANTWRITE: error = EIO; break;
42 case ERROR_CRC: error = EIO; break;
43 case ERROR_CURRENT_DIRECTORY: error = EACCES; break;
44 case ERROR_DEVICE_IN_USE: error = EBUSY; break;
45 case ERROR_DEV_NOT_EXIST: error = ENODEV; break;
46 case ERROR_DIRECTORY: error = EINVAL; break;
47 case ERROR_DIR_NOT_EMPTY: error = ENOTEMPTY; break;
48 case ERROR_DISK_CHANGE: error = EIO; break;
49 case ERROR_DISK_FULL: error = ENOSPC; break;
50 case ERROR_DRIVE_LOCKED: error = EBUSY; break;
51 case ERROR_ENVVAR_NOT_FOUND: error = EINVAL; break;
52 case ERROR_EXE_MARKED_INVALID: error = ENOEXEC; break;
53 case ERROR_FILENAME_EXCED_RANGE: error = ENAMETOOLONG; break;
54 case ERROR_FILE_EXISTS: error = EEXIST; break;
55 case ERROR_FILE_INVALID: error = ENODEV; break;
56 case ERROR_FILE_NOT_FOUND: error = ENOENT; break;
57 case ERROR_GEN_FAILURE: error = EIO; break;
58 case ERROR_HANDLE_DISK_FULL: error = ENOSPC; break;
59 case ERROR_INSUFFICIENT_BUFFER: error = ENOMEM; break;
60 case ERROR_INVALID_ACCESS: error = EACCES; break;
61 case ERROR_INVALID_ADDRESS: error = EFAULT; break;
62 case ERROR_INVALID_BLOCK: error = EFAULT; break;
63 case ERROR_INVALID_DATA: error = EINVAL; break;
64 case ERROR_INVALID_DRIVE: error = ENODEV; break;
65 case ERROR_INVALID_EXE_SIGNATURE: error = ENOEXEC; break;
66 case ERROR_INVALID_FLAGS: error = EINVAL; break;
67 case ERROR_INVALID_FUNCTION: error = ENOSYS; break;
68 case ERROR_INVALID_HANDLE: error = EBADF; break;
69 case ERROR_INVALID_LOGON_HOURS: error = EACCES; break;
70 case ERROR_INVALID_NAME: error = EINVAL; break;
71 case ERROR_INVALID_OWNER: error = EINVAL; break;
72 case ERROR_INVALID_PARAMETER: error = EINVAL; break;
73 case ERROR_INVALID_PASSWORD: error = EPERM; break;
74 case ERROR_INVALID_PRIMARY_GROUP: error = EINVAL; break;
75 case ERROR_INVALID_SIGNAL_NUMBER: error = EINVAL; break;
76 case ERROR_INVALID_TARGET_HANDLE: error = EIO; break;
77 case ERROR_INVALID_WORKSTATION: error = EACCES; break;
78 case ERROR_IO_DEVICE: error = EIO; break;
79 case ERROR_IO_INCOMPLETE: error = EINTR; break;
80 case ERROR_LOCKED: error = EBUSY; break;
81 case ERROR_LOCK_VIOLATION: error = EACCES; break;
82 case ERROR_LOGON_FAILURE: error = EACCES; break;
83 case ERROR_MAPPED_ALIGNMENT: error = EINVAL; break;
84 case ERROR_META_EXPANSION_TOO_LONG: error = E2BIG; break;
85 case ERROR_MORE_DATA: error = EPIPE; break;
86 case ERROR_NEGATIVE_SEEK: error = ESPIPE; break;
87 case ERROR_NOACCESS: error = EFAULT; break;
88 case ERROR_NONE_MAPPED: error = EINVAL; break;
89 case ERROR_NOT_ENOUGH_MEMORY: error = ENOMEM; break;
90 case ERROR_NOT_READY: error = EAGAIN; break;
91 case ERROR_NOT_SAME_DEVICE: error = EXDEV; break;
92 case ERROR_NO_DATA: error = EPIPE; break;
93 case ERROR_NO_MORE_SEARCH_HANDLES: error = EIO; break;
94 case ERROR_NO_PROC_SLOTS: error = EAGAIN; break;
95 case ERROR_NO_SUCH_PRIVILEGE: error = EACCES; break;
96 case ERROR_OPEN_FAILED: error = EIO; break;
97 case ERROR_OPEN_FILES: error = EBUSY; break;
98 case ERROR_OPERATION_ABORTED: error = EINTR; break;
99 case ERROR_OUTOFMEMORY: error = ENOMEM; break;
100 case ERROR_PASSWORD_EXPIRED: error = EACCES; break;
101 case ERROR_PATH_BUSY: error = EBUSY; break;
102 case ERROR_PATH_NOT_FOUND: error = ENOENT; break;
103 case ERROR_PIPE_BUSY: error = EBUSY; break;
104 case ERROR_PIPE_CONNECTED: error = EPIPE; break;
105 case ERROR_PIPE_LISTENING: error = EPIPE; break;
106 case ERROR_PIPE_NOT_CONNECTED: error = EPIPE; break;
107 case ERROR_PRIVILEGE_NOT_HELD: error = EACCES; break;
108 case ERROR_READ_FAULT: error = EIO; break;
109 case ERROR_SEEK: error = EIO; break;
110 case ERROR_SEEK_ON_DEVICE: error = ESPIPE; break;
111 case ERROR_SHARING_BUFFER_EXCEEDED: error = ENFILE; break;
112 case ERROR_SHARING_VIOLATION: error = EACCES; break;
113 case ERROR_STACK_OVERFLOW: error = ENOMEM; break;
114 case ERROR_SWAPERROR: error = ENOENT; break;
115 case ERROR_TOO_MANY_MODULES: error = EMFILE; break;
116 case ERROR_TOO_MANY_OPEN_FILES: error = EMFILE; break;
117 case ERROR_UNRECOGNIZED_MEDIA: error = ENXIO; break;
118 case ERROR_UNRECOGNIZED_VOLUME: error = ENODEV; break;
119 case ERROR_WAIT_NO_CHILDREN: error = ECHILD; break;
120 case ERROR_WRITE_FAULT: error = EIO; break;
121 case ERROR_WRITE_PROTECT: error = EROFS; break;
122 }
123 return error;
124 }
125
126 static inline int is_file_in_use_error(DWORD errcode)
127 {
128 switch (errcode) {
129 case ERROR_SHARING_VIOLATION:
130 case ERROR_ACCESS_DENIED:
131 return 1;
132 }
133
134 return 0;
135 }
136
137 static int read_yes_no_answer(void)
138 {
139 char answer[1024];
140
141 if (fgets(answer, sizeof(answer), stdin)) {
142 size_t answer_len = strlen(answer);
143 int got_full_line = 0, c;
144
145 /* remove the newline */
146 if (answer_len >= 2 && answer[answer_len-2] == '\r') {
147 answer[answer_len-2] = '\0';
148 got_full_line = 1;
149 } else if (answer_len >= 1 && answer[answer_len-1] == '\n') {
150 answer[answer_len-1] = '\0';
151 got_full_line = 1;
152 }
153 /* flush the buffer in case we did not get the full line */
154 if (!got_full_line)
155 while ((c = getchar()) != EOF && c != '\n')
156 ;
157 } else
158 /* we could not read, return the
159 * default answer which is no */
160 return 0;
161
162 if (tolower(answer[0]) == 'y' && !answer[1])
163 return 1;
164 if (!strncasecmp(answer, "yes", sizeof(answer)))
165 return 1;
166 if (tolower(answer[0]) == 'n' && !answer[1])
167 return 0;
168 if (!strncasecmp(answer, "no", sizeof(answer)))
169 return 0;
170
171 /* did not find an answer we understand */
172 return -1;
173 }
174
175 static int ask_yes_no_if_possible(const char *format, ...)
176 {
177 char question[4096];
178 const char *retry_hook[] = { NULL, NULL, NULL };
179 va_list args;
180
181 va_start(args, format);
182 vsnprintf(question, sizeof(question), format, args);
183 va_end(args);
184
185 if ((retry_hook[0] = mingw_getenv("GIT_ASK_YESNO"))) {
186 retry_hook[1] = question;
187 return !run_command_v_opt(retry_hook, 0);
188 }
189
190 if (!isatty(_fileno(stdin)) || !isatty(_fileno(stderr)))
191 return 0;
192
193 while (1) {
194 int answer;
195 fprintf(stderr, "%s (y/n) ", question);
196
197 if ((answer = read_yes_no_answer()) >= 0)
198 return answer;
199
200 fprintf(stderr, "Sorry, I did not understand your answer. "
201 "Please type 'y' or 'n'\n");
202 }
203 }
204
205 int mingw_unlink(const char *pathname)
206 {
207 int ret, tries = 0;
208 wchar_t wpathname[MAX_PATH];
209 if (xutftowcs_path(wpathname, pathname) < 0)
210 return -1;
211
212 /* read-only files cannot be removed */
213 _wchmod(wpathname, 0666);
214 while ((ret = _wunlink(wpathname)) == -1 && tries < ARRAY_SIZE(delay)) {
215 if (!is_file_in_use_error(GetLastError()))
216 break;
217 /*
218 * We assume that some other process had the source or
219 * destination file open at the wrong moment and retry.
220 * In order to give the other process a higher chance to
221 * complete its operation, we give up our time slice now.
222 * If we have to retry again, we do sleep a bit.
223 */
224 Sleep(delay[tries]);
225 tries++;
226 }
227 while (ret == -1 && is_file_in_use_error(GetLastError()) &&
228 ask_yes_no_if_possible("Unlink of file '%s' failed. "
229 "Should I try again?", pathname))
230 ret = _wunlink(wpathname);
231 return ret;
232 }
233
234 static int is_dir_empty(const wchar_t *wpath)
235 {
236 WIN32_FIND_DATAW findbuf;
237 HANDLE handle;
238 wchar_t wbuf[MAX_PATH + 2];
239 wcscpy(wbuf, wpath);
240 wcscat(wbuf, L"\\*");
241 handle = FindFirstFileW(wbuf, &findbuf);
242 if (handle == INVALID_HANDLE_VALUE)
243 return GetLastError() == ERROR_NO_MORE_FILES;
244
245 while (!wcscmp(findbuf.cFileName, L".") ||
246 !wcscmp(findbuf.cFileName, L".."))
247 if (!FindNextFileW(handle, &findbuf)) {
248 DWORD err = GetLastError();
249 FindClose(handle);
250 return err == ERROR_NO_MORE_FILES;
251 }
252 FindClose(handle);
253 return 0;
254 }
255
256 int mingw_rmdir(const char *pathname)
257 {
258 int ret, tries = 0;
259 wchar_t wpathname[MAX_PATH];
260 if (xutftowcs_path(wpathname, pathname) < 0)
261 return -1;
262
263 while ((ret = _wrmdir(wpathname)) == -1 && tries < ARRAY_SIZE(delay)) {
264 if (!is_file_in_use_error(GetLastError()))
265 errno = err_win_to_posix(GetLastError());
266 if (errno != EACCES)
267 break;
268 if (!is_dir_empty(wpathname)) {
269 errno = ENOTEMPTY;
270 break;
271 }
272 /*
273 * We assume that some other process had the source or
274 * destination file open at the wrong moment and retry.
275 * In order to give the other process a higher chance to
276 * complete its operation, we give up our time slice now.
277 * If we have to retry again, we do sleep a bit.
278 */
279 Sleep(delay[tries]);
280 tries++;
281 }
282 while (ret == -1 && errno == EACCES && is_file_in_use_error(GetLastError()) &&
283 ask_yes_no_if_possible("Deletion of directory '%s' failed. "
284 "Should I try again?", pathname))
285 ret = _wrmdir(wpathname);
286 return ret;
287 }
288
289 static inline int needs_hiding(const char *path)
290 {
291 const char *basename;
292
293 if (hide_dotfiles == HIDE_DOTFILES_FALSE)
294 return 0;
295
296 /* We cannot use basename(), as it would remove trailing slashes */
297 mingw_skip_dos_drive_prefix((char **)&path);
298 if (!*path)
299 return 0;
300
301 for (basename = path; *path; path++)
302 if (is_dir_sep(*path)) {
303 do {
304 path++;
305 } while (is_dir_sep(*path));
306 /* ignore trailing slashes */
307 if (*path)
308 basename = path;
309 }
310
311 if (hide_dotfiles == HIDE_DOTFILES_TRUE)
312 return *basename == '.';
313
314 assert(hide_dotfiles == HIDE_DOTFILES_DOTGITONLY);
315 return !strncasecmp(".git", basename, 4) &&
316 (!basename[4] || is_dir_sep(basename[4]));
317 }
318
319 static int set_hidden_flag(const wchar_t *path, int set)
320 {
321 DWORD original = GetFileAttributesW(path), modified;
322 if (set)
323 modified = original | FILE_ATTRIBUTE_HIDDEN;
324 else
325 modified = original & ~FILE_ATTRIBUTE_HIDDEN;
326 if (original == modified || SetFileAttributesW(path, modified))
327 return 0;
328 errno = err_win_to_posix(GetLastError());
329 return -1;
330 }
331
332 int mingw_mkdir(const char *path, int mode)
333 {
334 int ret;
335 wchar_t wpath[MAX_PATH];
336 if (xutftowcs_path(wpath, path) < 0)
337 return -1;
338 ret = _wmkdir(wpath);
339 if (!ret && needs_hiding(path))
340 return set_hidden_flag(wpath, 1);
341 return ret;
342 }
343
344 int mingw_open (const char *filename, int oflags, ...)
345 {
346 va_list args;
347 unsigned mode;
348 int fd;
349 wchar_t wfilename[MAX_PATH];
350
351 va_start(args, oflags);
352 mode = va_arg(args, int);
353 va_end(args);
354
355 if (filename && !strcmp(filename, "/dev/null"))
356 filename = "nul";
357
358 if (xutftowcs_path(wfilename, filename) < 0)
359 return -1;
360 fd = _wopen(wfilename, oflags, mode);
361
362 if (fd < 0 && (oflags & O_ACCMODE) != O_RDONLY && errno == EACCES) {
363 DWORD attrs = GetFileAttributesW(wfilename);
364 if (attrs != INVALID_FILE_ATTRIBUTES && (attrs & FILE_ATTRIBUTE_DIRECTORY))
365 errno = EISDIR;
366 }
367 if ((oflags & O_CREAT) && needs_hiding(filename)) {
368 /*
369 * Internally, _wopen() uses the CreateFile() API which errors
370 * out with an ERROR_ACCESS_DENIED if CREATE_ALWAYS was
371 * specified and an already existing file's attributes do not
372 * match *exactly*. As there is no mode or flag we can set that
373 * would correspond to FILE_ATTRIBUTE_HIDDEN, let's just try
374 * again *without* the O_CREAT flag (that corresponds to the
375 * CREATE_ALWAYS flag of CreateFile()).
376 */
377 if (fd < 0 && errno == EACCES)
378 fd = _wopen(wfilename, oflags & ~O_CREAT, mode);
379 if (fd >= 0 && set_hidden_flag(wfilename, 1))
380 warning("could not mark '%s' as hidden.", filename);
381 }
382 return fd;
383 }
384
385 static BOOL WINAPI ctrl_ignore(DWORD type)
386 {
387 return TRUE;
388 }
389
390 #undef fgetc
391 int mingw_fgetc(FILE *stream)
392 {
393 int ch;
394 if (!isatty(_fileno(stream)))
395 return fgetc(stream);
396
397 SetConsoleCtrlHandler(ctrl_ignore, TRUE);
398 while (1) {
399 ch = fgetc(stream);
400 if (ch != EOF || GetLastError() != ERROR_OPERATION_ABORTED)
401 break;
402
403 /* Ctrl+C was pressed, simulate SIGINT and retry */
404 mingw_raise(SIGINT);
405 }
406 SetConsoleCtrlHandler(ctrl_ignore, FALSE);
407 return ch;
408 }
409
410 #undef fopen
411 FILE *mingw_fopen (const char *filename, const char *otype)
412 {
413 int hide = needs_hiding(filename);
414 FILE *file;
415 wchar_t wfilename[MAX_PATH], wotype[4];
416 if (filename && !strcmp(filename, "/dev/null"))
417 filename = "nul";
418 if (xutftowcs_path(wfilename, filename) < 0 ||
419 xutftowcs(wotype, otype, ARRAY_SIZE(wotype)) < 0)
420 return NULL;
421 if (hide && !access(filename, F_OK) && set_hidden_flag(wfilename, 0)) {
422 error("could not unhide %s", filename);
423 return NULL;
424 }
425 file = _wfopen(wfilename, wotype);
426 if (file && hide && set_hidden_flag(wfilename, 1))
427 warning("could not mark '%s' as hidden.", filename);
428 return file;
429 }
430
431 FILE *mingw_freopen (const char *filename, const char *otype, FILE *stream)
432 {
433 int hide = needs_hiding(filename);
434 FILE *file;
435 wchar_t wfilename[MAX_PATH], wotype[4];
436 if (filename && !strcmp(filename, "/dev/null"))
437 filename = "nul";
438 if (xutftowcs_path(wfilename, filename) < 0 ||
439 xutftowcs(wotype, otype, ARRAY_SIZE(wotype)) < 0)
440 return NULL;
441 if (hide && !access(filename, F_OK) && set_hidden_flag(wfilename, 0)) {
442 error("could not unhide %s", filename);
443 return NULL;
444 }
445 file = _wfreopen(wfilename, wotype, stream);
446 if (file && hide && set_hidden_flag(wfilename, 1))
447 warning("could not mark '%s' as hidden.", filename);
448 return file;
449 }
450
451 #undef fflush
452 int mingw_fflush(FILE *stream)
453 {
454 int ret = fflush(stream);
455
456 /*
457 * write() is used behind the scenes of stdio output functions.
458 * Since git code does not check for errors after each stdio write
459 * operation, it can happen that write() is called by a later
460 * stdio function even if an earlier write() call failed. In the
461 * case of a pipe whose readable end was closed, only the first
462 * call to write() reports EPIPE on Windows. Subsequent write()
463 * calls report EINVAL. It is impossible to notice whether this
464 * fflush invocation triggered such a case, therefore, we have to
465 * catch all EINVAL errors whole-sale.
466 */
467 if (ret && errno == EINVAL)
468 errno = EPIPE;
469
470 return ret;
471 }
472
473 #undef write
474 ssize_t mingw_write(int fd, const void *buf, size_t len)
475 {
476 ssize_t result = write(fd, buf, len);
477
478 if (result < 0 && errno == EINVAL && buf) {
479 /* check if fd is a pipe */
480 HANDLE h = (HANDLE) _get_osfhandle(fd);
481 if (GetFileType(h) == FILE_TYPE_PIPE)
482 errno = EPIPE;
483 else
484 errno = EINVAL;
485 }
486
487 return result;
488 }
489
490 int mingw_access(const char *filename, int mode)
491 {
492 wchar_t wfilename[MAX_PATH];
493 if (xutftowcs_path(wfilename, filename) < 0)
494 return -1;
495 /* X_OK is not supported by the MSVCRT version */
496 return _waccess(wfilename, mode & ~X_OK);
497 }
498
499 int mingw_chdir(const char *dirname)
500 {
501 wchar_t wdirname[MAX_PATH];
502 if (xutftowcs_path(wdirname, dirname) < 0)
503 return -1;
504 return _wchdir(wdirname);
505 }
506
507 int mingw_chmod(const char *filename, int mode)
508 {
509 wchar_t wfilename[MAX_PATH];
510 if (xutftowcs_path(wfilename, filename) < 0)
511 return -1;
512 return _wchmod(wfilename, mode);
513 }
514
515 /*
516 * The unit of FILETIME is 100-nanoseconds since January 1, 1601, UTC.
517 * Returns the 100-nanoseconds ("hekto nanoseconds") since the epoch.
518 */
519 static inline long long filetime_to_hnsec(const FILETIME *ft)
520 {
521 long long winTime = ((long long)ft->dwHighDateTime << 32) + ft->dwLowDateTime;
522 /* Windows to Unix Epoch conversion */
523 return winTime - 116444736000000000LL;
524 }
525
526 static inline time_t filetime_to_time_t(const FILETIME *ft)
527 {
528 return (time_t)(filetime_to_hnsec(ft) / 10000000);
529 }
530
531 /**
532 * Verifies that safe_create_leading_directories() would succeed.
533 */
534 static int has_valid_directory_prefix(wchar_t *wfilename)
535 {
536 int n = wcslen(wfilename);
537
538 while (n > 0) {
539 wchar_t c = wfilename[--n];
540 DWORD attributes;
541
542 if (!is_dir_sep(c))
543 continue;
544
545 wfilename[n] = L'\0';
546 attributes = GetFileAttributesW(wfilename);
547 wfilename[n] = c;
548 if (attributes == FILE_ATTRIBUTE_DIRECTORY ||
549 attributes == FILE_ATTRIBUTE_DEVICE)
550 return 1;
551 if (attributes == INVALID_FILE_ATTRIBUTES)
552 switch (GetLastError()) {
553 case ERROR_PATH_NOT_FOUND:
554 continue;
555 case ERROR_FILE_NOT_FOUND:
556 /* This implies parent directory exists. */
557 return 1;
558 }
559 return 0;
560 }
561 return 1;
562 }
563
564 /* We keep the do_lstat code in a separate function to avoid recursion.
565 * When a path ends with a slash, the stat will fail with ENOENT. In
566 * this case, we strip the trailing slashes and stat again.
567 *
568 * If follow is true then act like stat() and report on the link
569 * target. Otherwise report on the link itself.
570 */
571 static int do_lstat(int follow, const char *file_name, struct stat *buf)
572 {
573 WIN32_FILE_ATTRIBUTE_DATA fdata;
574 wchar_t wfilename[MAX_PATH];
575 if (xutftowcs_path(wfilename, file_name) < 0)
576 return -1;
577
578 if (GetFileAttributesExW(wfilename, GetFileExInfoStandard, &fdata)) {
579 buf->st_ino = 0;
580 buf->st_gid = 0;
581 buf->st_uid = 0;
582 buf->st_nlink = 1;
583 buf->st_mode = file_attr_to_st_mode(fdata.dwFileAttributes);
584 buf->st_size = fdata.nFileSizeLow |
585 (((off_t)fdata.nFileSizeHigh)<<32);
586 buf->st_dev = buf->st_rdev = 0; /* not used by Git */
587 buf->st_atime = filetime_to_time_t(&(fdata.ftLastAccessTime));
588 buf->st_mtime = filetime_to_time_t(&(fdata.ftLastWriteTime));
589 buf->st_ctime = filetime_to_time_t(&(fdata.ftCreationTime));
590 if (fdata.dwFileAttributes & FILE_ATTRIBUTE_REPARSE_POINT) {
591 WIN32_FIND_DATAW findbuf;
592 HANDLE handle = FindFirstFileW(wfilename, &findbuf);
593 if (handle != INVALID_HANDLE_VALUE) {
594 if ((findbuf.dwFileAttributes & FILE_ATTRIBUTE_REPARSE_POINT) &&
595 (findbuf.dwReserved0 == IO_REPARSE_TAG_SYMLINK)) {
596 if (follow) {
597 char buffer[MAXIMUM_REPARSE_DATA_BUFFER_SIZE];
598 buf->st_size = readlink(file_name, buffer, MAXIMUM_REPARSE_DATA_BUFFER_SIZE);
599 } else {
600 buf->st_mode = S_IFLNK;
601 }
602 buf->st_mode |= S_IREAD;
603 if (!(findbuf.dwFileAttributes & FILE_ATTRIBUTE_READONLY))
604 buf->st_mode |= S_IWRITE;
605 }
606 FindClose(handle);
607 }
608 }
609 return 0;
610 }
611 switch (GetLastError()) {
612 case ERROR_ACCESS_DENIED:
613 case ERROR_SHARING_VIOLATION:
614 case ERROR_LOCK_VIOLATION:
615 case ERROR_SHARING_BUFFER_EXCEEDED:
616 errno = EACCES;
617 break;
618 case ERROR_BUFFER_OVERFLOW:
619 errno = ENAMETOOLONG;
620 break;
621 case ERROR_NOT_ENOUGH_MEMORY:
622 errno = ENOMEM;
623 break;
624 case ERROR_PATH_NOT_FOUND:
625 if (!has_valid_directory_prefix(wfilename)) {
626 errno = ENOTDIR;
627 break;
628 }
629 /* fallthru */
630 default:
631 errno = ENOENT;
632 break;
633 }
634 return -1;
635 }
636
637 /* We provide our own lstat/fstat functions, since the provided
638 * lstat/fstat functions are so slow. These stat functions are
639 * tailored for Git's usage (read: fast), and are not meant to be
640 * complete. Note that Git stat()s are redirected to mingw_lstat()
641 * too, since Windows doesn't really handle symlinks that well.
642 */
643 static int do_stat_internal(int follow, const char *file_name, struct stat *buf)
644 {
645 int namelen;
646 char alt_name[PATH_MAX];
647
648 if (!do_lstat(follow, file_name, buf))
649 return 0;
650
651 /* if file_name ended in a '/', Windows returned ENOENT;
652 * try again without trailing slashes
653 */
654 if (errno != ENOENT)
655 return -1;
656
657 namelen = strlen(file_name);
658 if (namelen && file_name[namelen-1] != '/')
659 return -1;
660 while (namelen && file_name[namelen-1] == '/')
661 --namelen;
662 if (!namelen || namelen >= PATH_MAX)
663 return -1;
664
665 memcpy(alt_name, file_name, namelen);
666 alt_name[namelen] = 0;
667 return do_lstat(follow, alt_name, buf);
668 }
669
670 int mingw_lstat(const char *file_name, struct stat *buf)
671 {
672 return do_stat_internal(0, file_name, buf);
673 }
674 int mingw_stat(const char *file_name, struct stat *buf)
675 {
676 return do_stat_internal(1, file_name, buf);
677 }
678
679 int mingw_fstat(int fd, struct stat *buf)
680 {
681 HANDLE fh = (HANDLE)_get_osfhandle(fd);
682 BY_HANDLE_FILE_INFORMATION fdata;
683
684 if (fh == INVALID_HANDLE_VALUE) {
685 errno = EBADF;
686 return -1;
687 }
688 /* direct non-file handles to MS's fstat() */
689 if (GetFileType(fh) != FILE_TYPE_DISK)
690 return _fstati64(fd, buf);
691
692 if (GetFileInformationByHandle(fh, &fdata)) {
693 buf->st_ino = 0;
694 buf->st_gid = 0;
695 buf->st_uid = 0;
696 buf->st_nlink = 1;
697 buf->st_mode = file_attr_to_st_mode(fdata.dwFileAttributes);
698 buf->st_size = fdata.nFileSizeLow |
699 (((off_t)fdata.nFileSizeHigh)<<32);
700 buf->st_dev = buf->st_rdev = 0; /* not used by Git */
701 buf->st_atime = filetime_to_time_t(&(fdata.ftLastAccessTime));
702 buf->st_mtime = filetime_to_time_t(&(fdata.ftLastWriteTime));
703 buf->st_ctime = filetime_to_time_t(&(fdata.ftCreationTime));
704 return 0;
705 }
706 errno = EBADF;
707 return -1;
708 }
709
710 static inline void time_t_to_filetime(time_t t, FILETIME *ft)
711 {
712 long long winTime = t * 10000000LL + 116444736000000000LL;
713 ft->dwLowDateTime = winTime;
714 ft->dwHighDateTime = winTime >> 32;
715 }
716
717 int mingw_utime (const char *file_name, const struct utimbuf *times)
718 {
719 FILETIME mft, aft;
720 int fh, rc;
721 DWORD attrs;
722 wchar_t wfilename[MAX_PATH];
723 if (xutftowcs_path(wfilename, file_name) < 0)
724 return -1;
725
726 /* must have write permission */
727 attrs = GetFileAttributesW(wfilename);
728 if (attrs != INVALID_FILE_ATTRIBUTES &&
729 (attrs & FILE_ATTRIBUTE_READONLY)) {
730 /* ignore errors here; open() will report them */
731 SetFileAttributesW(wfilename, attrs & ~FILE_ATTRIBUTE_READONLY);
732 }
733
734 if ((fh = _wopen(wfilename, O_RDWR | O_BINARY)) < 0) {
735 rc = -1;
736 goto revert_attrs;
737 }
738
739 if (times) {
740 time_t_to_filetime(times->modtime, &mft);
741 time_t_to_filetime(times->actime, &aft);
742 } else {
743 GetSystemTimeAsFileTime(&mft);
744 aft = mft;
745 }
746 if (!SetFileTime((HANDLE)_get_osfhandle(fh), NULL, &aft, &mft)) {
747 errno = EINVAL;
748 rc = -1;
749 } else
750 rc = 0;
751 close(fh);
752
753 revert_attrs:
754 if (attrs != INVALID_FILE_ATTRIBUTES &&
755 (attrs & FILE_ATTRIBUTE_READONLY)) {
756 /* ignore errors again */
757 SetFileAttributesW(wfilename, attrs);
758 }
759 return rc;
760 }
761
762 unsigned int sleep (unsigned int seconds)
763 {
764 Sleep(seconds*1000);
765 return 0;
766 }
767
768 char *mingw_mktemp(char *template)
769 {
770 wchar_t wtemplate[MAX_PATH];
771 if (xutftowcs_path(wtemplate, template) < 0)
772 return NULL;
773 if (!_wmktemp(wtemplate))
774 return NULL;
775 if (xwcstoutf(template, wtemplate, strlen(template) + 1) < 0)
776 return NULL;
777 return template;
778 }
779
780 int mkstemp(char *template)
781 {
782 char *filename = mktemp(template);
783 if (filename == NULL)
784 return -1;
785 return open(filename, O_RDWR | O_CREAT, 0600);
786 }
787
788 int gettimeofday(struct timeval *tv, void *tz)
789 {
790 FILETIME ft;
791 long long hnsec;
792
793 GetSystemTimeAsFileTime(&ft);
794 hnsec = filetime_to_hnsec(&ft);
795 tv->tv_sec = hnsec / 10000000;
796 tv->tv_usec = (hnsec % 10000000) / 10;
797 return 0;
798 }
799
800 int pipe(int filedes[2])
801 {
802 HANDLE h[2];
803
804 /* this creates non-inheritable handles */
805 if (!CreatePipe(&h[0], &h[1], NULL, 8192)) {
806 errno = err_win_to_posix(GetLastError());
807 return -1;
808 }
809 filedes[0] = _open_osfhandle(HCAST(int, h[0]), O_NOINHERIT);
810 if (filedes[0] < 0) {
811 CloseHandle(h[0]);
812 CloseHandle(h[1]);
813 return -1;
814 }
815 filedes[1] = _open_osfhandle(HCAST(int, h[1]), O_NOINHERIT);
816 if (filedes[1] < 0) {
817 close(filedes[0]);
818 CloseHandle(h[1]);
819 return -1;
820 }
821 return 0;
822 }
823
824 struct tm *gmtime_r(const time_t *timep, struct tm *result)
825 {
826 /* gmtime() in MSVCRT.DLL is thread-safe, but not reentrant */
827 memcpy(result, gmtime(timep), sizeof(struct tm));
828 return result;
829 }
830
831 struct tm *localtime_r(const time_t *timep, struct tm *result)
832 {
833 /* localtime() in MSVCRT.DLL is thread-safe, but not reentrant */
834 memcpy(result, localtime(timep), sizeof(struct tm));
835 return result;
836 }
837
838 char *mingw_getcwd(char *pointer, int len)
839 {
840 int i;
841 wchar_t wpointer[MAX_PATH];
842 if (!_wgetcwd(wpointer, ARRAY_SIZE(wpointer)))
843 return NULL;
844 if (xwcstoutf(pointer, wpointer, len) < 0)
845 return NULL;
846 for (i = 0; pointer[i]; i++)
847 if (pointer[i] == '\\')
848 pointer[i] = '/';
849 return pointer;
850 }
851
852 /*
853 * See http://msdn2.microsoft.com/en-us/library/17w5ykft(vs.71).aspx
854 * (Parsing C++ Command-Line Arguments)
855 */
856 static const char *quote_arg(const char *arg)
857 {
858 /* count chars to quote */
859 int len = 0, n = 0;
860 int force_quotes = 0;
861 char *q, *d;
862 const char *p = arg;
863 if (!*p) force_quotes = 1;
864 while (*p) {
865 if (isspace(*p) || *p == '*' || *p == '?' || *p == '{' || *p == '\'')
866 force_quotes = 1;
867 else if (*p == '"')
868 n++;
869 else if (*p == '\\') {
870 int count = 0;
871 while (*p == '\\') {
872 count++;
873 p++;
874 len++;
875 }
876 if (*p == '"')
877 n += count*2 + 1;
878 continue;
879 }
880 len++;
881 p++;
882 }
883 if (!force_quotes && n == 0)
884 return arg;
885
886 /* insert \ where necessary */
887 d = q = xmalloc(st_add3(len, n, 3));
888 *d++ = '"';
889 while (*arg) {
890 if (*arg == '"')
891 *d++ = '\\';
892 else if (*arg == '\\') {
893 int count = 0;
894 while (*arg == '\\') {
895 count++;
896 *d++ = *arg++;
897 }
898 if (*arg == '"') {
899 while (count-- > 0)
900 *d++ = '\\';
901 *d++ = '\\';
902 }
903 }
904 *d++ = *arg++;
905 }
906 *d++ = '"';
907 *d++ = 0;
908 return q;
909 }
910
911 static const char *parse_interpreter(const char *cmd)
912 {
913 static char buf[100];
914 char *p, *opt;
915 int n, fd;
916
917 /* don't even try a .exe */
918 n = strlen(cmd);
919 if (n >= 4 && !strcasecmp(cmd+n-4, ".exe"))
920 return NULL;
921
922 fd = open(cmd, O_RDONLY);
923 if (fd < 0)
924 return NULL;
925 n = read(fd, buf, sizeof(buf)-1);
926 close(fd);
927 if (n < 4) /* at least '#!/x' and not error */
928 return NULL;
929
930 if (buf[0] != '#' || buf[1] != '!')
931 return NULL;
932 buf[n] = '\0';
933 p = buf + strcspn(buf, "\r\n");
934 if (!*p)
935 return NULL;
936
937 *p = '\0';
938 if (!(p = strrchr(buf+2, '/')) && !(p = strrchr(buf+2, '\\')))
939 return NULL;
940 /* strip options */
941 if ((opt = strchr(p+1, ' ')))
942 *opt = '\0';
943 return p+1;
944 }
945
946 /*
947 * Splits the PATH into parts.
948 */
949 static char **get_path_split(void)
950 {
951 char *p, **path, *envpath = mingw_getenv("PATH");
952 int i, n = 0;
953
954 if (!envpath || !*envpath)
955 return NULL;
956
957 envpath = xstrdup(envpath);
958 p = envpath;
959 while (p) {
960 char *dir = p;
961 p = strchr(p, ';');
962 if (p) *p++ = '\0';
963 if (*dir) { /* not earlier, catches series of ; */
964 ++n;
965 }
966 }
967 if (!n)
968 return NULL;
969
970 ALLOC_ARRAY(path, n + 1);
971 p = envpath;
972 i = 0;
973 do {
974 if (*p)
975 path[i++] = xstrdup(p);
976 p = p+strlen(p)+1;
977 } while (i < n);
978 path[i] = NULL;
979
980 free(envpath);
981
982 return path;
983 }
984
985 static void free_path_split(char **path)
986 {
987 char **p = path;
988
989 if (!path)
990 return;
991
992 while (*p)
993 free(*p++);
994 free(path);
995 }
996
997 /*
998 * exe_only means that we only want to detect .exe files, but not scripts
999 * (which do not have an extension)
1000 */
1001 static char *lookup_prog(const char *dir, const char *cmd, int isexe, int exe_only)
1002 {
1003 char path[MAX_PATH];
1004 snprintf(path, sizeof(path), "%s/%s.exe", dir, cmd);
1005
1006 if (!isexe && access(path, F_OK) == 0)
1007 return xstrdup(path);
1008 path[strlen(path)-4] = '\0';
1009 if ((!exe_only || isexe) && access(path, F_OK) == 0)
1010 if (!(GetFileAttributes(path) & FILE_ATTRIBUTE_DIRECTORY))
1011 return xstrdup(path);
1012 return NULL;
1013 }
1014
1015 /*
1016 * Determines the absolute path of cmd using the split path in path.
1017 * If cmd contains a slash or backslash, no lookup is performed.
1018 */
1019 static char *path_lookup(const char *cmd, char **path, int exe_only)
1020 {
1021 char *prog = NULL;
1022 int len = strlen(cmd);
1023 int isexe = len >= 4 && !strcasecmp(cmd+len-4, ".exe");
1024
1025 if (strchr(cmd, '/') || strchr(cmd, '\\'))
1026 prog = xstrdup(cmd);
1027
1028 while (!prog && *path)
1029 prog = lookup_prog(*path++, cmd, isexe, exe_only);
1030
1031 return prog;
1032 }
1033
1034 static int do_putenv(char **env, const char *name, int size, int free_old);
1035
1036 /* used number of elements of environ array, including terminating NULL */
1037 static int environ_size = 0;
1038 /* allocated size of environ array, in bytes */
1039 static int environ_alloc = 0;
1040
1041 /*
1042 * Create environment block suitable for CreateProcess. Merges current
1043 * process environment and the supplied environment changes.
1044 */
1045 static wchar_t *make_environment_block(char **deltaenv)
1046 {
1047 wchar_t *wenvblk = NULL;
1048 char **tmpenv;
1049 int i = 0, size = environ_size, wenvsz = 0, wenvpos = 0;
1050
1051 while (deltaenv && deltaenv[i])
1052 i++;
1053
1054 /* copy the environment, leaving space for changes */
1055 ALLOC_ARRAY(tmpenv, size + i);
1056 memcpy(tmpenv, environ, size * sizeof(char*));
1057
1058 /* merge supplied environment changes into the temporary environment */
1059 for (i = 0; deltaenv && deltaenv[i]; i++)
1060 size = do_putenv(tmpenv, deltaenv[i], size, 0);
1061
1062 /* create environment block from temporary environment */
1063 for (i = 0; tmpenv[i]; i++) {
1064 size = 2 * strlen(tmpenv[i]) + 2; /* +2 for final \0 */
1065 ALLOC_GROW(wenvblk, (wenvpos + size) * sizeof(wchar_t), wenvsz);
1066 wenvpos += xutftowcs(&wenvblk[wenvpos], tmpenv[i], size) + 1;
1067 }
1068 /* add final \0 terminator */
1069 wenvblk[wenvpos] = 0;
1070 free(tmpenv);
1071 return wenvblk;
1072 }
1073
1074 struct pinfo_t {
1075 struct pinfo_t *next;
1076 pid_t pid;
1077 HANDLE proc;
1078 };
1079 static struct pinfo_t *pinfo = NULL;
1080 CRITICAL_SECTION pinfo_cs;
1081
1082 static pid_t mingw_spawnve_fd(const char *cmd, const char **argv, char **deltaenv,
1083 const char *dir,
1084 int prepend_cmd, int fhin, int fhout, int fherr)
1085 {
1086 STARTUPINFOW si;
1087 PROCESS_INFORMATION pi;
1088 struct strbuf args;
1089 wchar_t wcmd[MAX_PATH], wdir[MAX_PATH], *wargs, *wenvblk = NULL;
1090 unsigned flags = CREATE_UNICODE_ENVIRONMENT;
1091 BOOL ret;
1092
1093 /* Determine whether or not we are associated to a console */
1094 HANDLE cons = CreateFile("CONOUT$", GENERIC_WRITE,
1095 FILE_SHARE_WRITE, NULL, OPEN_EXISTING,
1096 FILE_ATTRIBUTE_NORMAL, NULL);
1097 if (cons == INVALID_HANDLE_VALUE) {
1098 /* There is no console associated with this process.
1099 * Since the child is a console process, Windows
1100 * would normally create a console window. But
1101 * since we'll be redirecting std streams, we do
1102 * not need the console.
1103 * It is necessary to use DETACHED_PROCESS
1104 * instead of CREATE_NO_WINDOW to make ssh
1105 * recognize that it has no console.
1106 */
1107 flags |= DETACHED_PROCESS;
1108 } else {
1109 /* There is already a console. If we specified
1110 * DETACHED_PROCESS here, too, Windows would
1111 * disassociate the child from the console.
1112 * The same is true for CREATE_NO_WINDOW.
1113 * Go figure!
1114 */
1115 CloseHandle(cons);
1116 }
1117 memset(&si, 0, sizeof(si));
1118 si.cb = sizeof(si);
1119 si.dwFlags = STARTF_USESTDHANDLES;
1120 si.hStdInput = winansi_get_osfhandle(fhin);
1121 si.hStdOutput = winansi_get_osfhandle(fhout);
1122 si.hStdError = winansi_get_osfhandle(fherr);
1123
1124 if (xutftowcs_path(wcmd, cmd) < 0)
1125 return -1;
1126 if (dir && xutftowcs_path(wdir, dir) < 0)
1127 return -1;
1128
1129 /* concatenate argv, quoting args as we go */
1130 strbuf_init(&args, 0);
1131 if (prepend_cmd) {
1132 char *quoted = (char *)quote_arg(cmd);
1133 strbuf_addstr(&args, quoted);
1134 if (quoted != cmd)
1135 free(quoted);
1136 }
1137 for (; *argv; argv++) {
1138 char *quoted = (char *)quote_arg(*argv);
1139 if (*args.buf)
1140 strbuf_addch(&args, ' ');
1141 strbuf_addstr(&args, quoted);
1142 if (quoted != *argv)
1143 free(quoted);
1144 }
1145
1146 ALLOC_ARRAY(wargs, st_add(st_mult(2, args.len), 1));
1147 xutftowcs(wargs, args.buf, 2 * args.len + 1);
1148 strbuf_release(&args);
1149
1150 wenvblk = make_environment_block(deltaenv);
1151
1152 memset(&pi, 0, sizeof(pi));
1153 ret = CreateProcessW(wcmd, wargs, NULL, NULL, TRUE, flags,
1154 wenvblk, dir ? wdir : NULL, &si, &pi);
1155
1156 free(wenvblk);
1157 free(wargs);
1158
1159 if (!ret) {
1160 errno = ENOENT;
1161 return -1;
1162 }
1163 CloseHandle(pi.hThread);
1164
1165 /*
1166 * The process ID is the human-readable identifier of the process
1167 * that we want to present in log and error messages. The handle
1168 * is not useful for this purpose. But we cannot close it, either,
1169 * because it is not possible to turn a process ID into a process
1170 * handle after the process terminated.
1171 * Keep the handle in a list for waitpid.
1172 */
1173 EnterCriticalSection(&pinfo_cs);
1174 {
1175 struct pinfo_t *info = xmalloc(sizeof(struct pinfo_t));
1176 info->pid = pi.dwProcessId;
1177 info->proc = pi.hProcess;
1178 info->next = pinfo;
1179 pinfo = info;
1180 }
1181 LeaveCriticalSection(&pinfo_cs);
1182
1183 return (pid_t)pi.dwProcessId;
1184 }
1185
1186 static pid_t mingw_spawnv(const char *cmd, const char **argv, int prepend_cmd)
1187 {
1188 return mingw_spawnve_fd(cmd, argv, NULL, NULL, prepend_cmd, 0, 1, 2);
1189 }
1190
1191 pid_t mingw_spawnvpe(const char *cmd, const char **argv, char **deltaenv,
1192 const char *dir,
1193 int fhin, int fhout, int fherr)
1194 {
1195 pid_t pid;
1196 char **path = get_path_split();
1197 char *prog = path_lookup(cmd, path, 0);
1198
1199 if (!prog) {
1200 errno = ENOENT;
1201 pid = -1;
1202 }
1203 else {
1204 const char *interpr = parse_interpreter(prog);
1205
1206 if (interpr) {
1207 const char *argv0 = argv[0];
1208 char *iprog = path_lookup(interpr, path, 1);
1209 argv[0] = prog;
1210 if (!iprog) {
1211 errno = ENOENT;
1212 pid = -1;
1213 }
1214 else {
1215 pid = mingw_spawnve_fd(iprog, argv, deltaenv, dir, 1,
1216 fhin, fhout, fherr);
1217 free(iprog);
1218 }
1219 argv[0] = argv0;
1220 }
1221 else
1222 pid = mingw_spawnve_fd(prog, argv, deltaenv, dir, 0,
1223 fhin, fhout, fherr);
1224 free(prog);
1225 }
1226 free_path_split(path);
1227 return pid;
1228 }
1229
1230 static int try_shell_exec(const char *cmd, char *const *argv)
1231 {
1232 const char *interpr = parse_interpreter(cmd);
1233 char **path;
1234 char *prog;
1235 int pid = 0;
1236
1237 if (!interpr)
1238 return 0;
1239 path = get_path_split();
1240 prog = path_lookup(interpr, path, 1);
1241 if (prog) {
1242 int argc = 0;
1243 const char **argv2;
1244 while (argv[argc]) argc++;
1245 ALLOC_ARRAY(argv2, argc + 1);
1246 argv2[0] = (char *)cmd; /* full path to the script file */
1247 memcpy(&argv2[1], &argv[1], sizeof(*argv) * argc);
1248 pid = mingw_spawnv(prog, argv2, 1);
1249 if (pid >= 0) {
1250 int status;
1251 if (waitpid(pid, &status, 0) < 0)
1252 status = 255;
1253 exit(status);
1254 }
1255 pid = 1; /* indicate that we tried but failed */
1256 free(prog);
1257 free(argv2);
1258 }
1259 free_path_split(path);
1260 return pid;
1261 }
1262
1263 int mingw_execv(const char *cmd, char *const *argv)
1264 {
1265 /* check if git_command is a shell script */
1266 if (!try_shell_exec(cmd, argv)) {
1267 int pid, status;
1268
1269 pid = mingw_spawnv(cmd, (const char **)argv, 0);
1270 if (pid < 0)
1271 return -1;
1272 if (waitpid(pid, &status, 0) < 0)
1273 status = 255;
1274 exit(status);
1275 }
1276 return -1;
1277 }
1278
1279 int mingw_execvp(const char *cmd, char *const *argv)
1280 {
1281 char **path = get_path_split();
1282 char *prog = path_lookup(cmd, path, 0);
1283
1284 if (prog) {
1285 mingw_execv(prog, argv);
1286 free(prog);
1287 } else
1288 errno = ENOENT;
1289
1290 free_path_split(path);
1291 return -1;
1292 }
1293
1294 int mingw_kill(pid_t pid, int sig)
1295 {
1296 if (pid > 0 && sig == SIGTERM) {
1297 HANDLE h = OpenProcess(PROCESS_TERMINATE, FALSE, pid);
1298
1299 if (TerminateProcess(h, -1)) {
1300 CloseHandle(h);
1301 return 0;
1302 }
1303
1304 errno = err_win_to_posix(GetLastError());
1305 CloseHandle(h);
1306 return -1;
1307 } else if (pid > 0 && sig == 0) {
1308 HANDLE h = OpenProcess(PROCESS_QUERY_INFORMATION, FALSE, pid);
1309 if (h) {
1310 CloseHandle(h);
1311 return 0;
1312 }
1313 }
1314
1315 errno = EINVAL;
1316 return -1;
1317 }
1318
1319 /*
1320 * Compare environment entries by key (i.e. stopping at '=' or '\0').
1321 */
1322 static int compareenv(const void *v1, const void *v2)
1323 {
1324 const char *e1 = *(const char**)v1;
1325 const char *e2 = *(const char**)v2;
1326
1327 for (;;) {
1328 int c1 = *e1++;
1329 int c2 = *e2++;
1330 c1 = (c1 == '=') ? 0 : tolower(c1);
1331 c2 = (c2 == '=') ? 0 : tolower(c2);
1332 if (c1 > c2)
1333 return 1;
1334 if (c1 < c2)
1335 return -1;
1336 if (c1 == 0)
1337 return 0;
1338 }
1339 }
1340
1341 static int bsearchenv(char **env, const char *name, size_t size)
1342 {
1343 unsigned low = 0, high = size;
1344 while (low < high) {
1345 unsigned mid = low + ((high - low) >> 1);
1346 int cmp = compareenv(&env[mid], &name);
1347 if (cmp < 0)
1348 low = mid + 1;
1349 else if (cmp > 0)
1350 high = mid;
1351 else
1352 return mid;
1353 }
1354 return ~low; /* not found, return 1's complement of insert position */
1355 }
1356
1357 /*
1358 * If name contains '=', then sets the variable, otherwise it unsets it
1359 * Size includes the terminating NULL. Env must have room for size + 1 entries
1360 * (in case of insert). Returns the new size. Optionally frees removed entries.
1361 */
1362 static int do_putenv(char **env, const char *name, int size, int free_old)
1363 {
1364 int i = bsearchenv(env, name, size - 1);
1365
1366 /* optionally free removed / replaced entry */
1367 if (i >= 0 && free_old)
1368 free(env[i]);
1369
1370 if (strchr(name, '=')) {
1371 /* if new value ('key=value') is specified, insert or replace entry */
1372 if (i < 0) {
1373 i = ~i;
1374 memmove(&env[i + 1], &env[i], (size - i) * sizeof(char*));
1375 size++;
1376 }
1377 env[i] = (char*) name;
1378 } else if (i >= 0) {
1379 /* otherwise ('key') remove existing entry */
1380 size--;
1381 memmove(&env[i], &env[i + 1], (size - i) * sizeof(char*));
1382 }
1383 return size;
1384 }
1385
1386 char *mingw_getenv(const char *name)
1387 {
1388 char *value;
1389 int pos = bsearchenv(environ, name, environ_size - 1);
1390 if (pos < 0)
1391 return NULL;
1392 value = strchr(environ[pos], '=');
1393 return value ? &value[1] : NULL;
1394 }
1395
1396 int mingw_putenv(const char *namevalue)
1397 {
1398 ALLOC_GROW(environ, (environ_size + 1) * sizeof(char*), environ_alloc);
1399 environ_size = do_putenv(environ, namevalue, environ_size, 1);
1400 return 0;
1401 }
1402
1403 /*
1404 * Note, this isn't a complete replacement for getaddrinfo. It assumes
1405 * that service contains a numerical port, or that it is null. It
1406 * does a simple search using gethostbyname, and returns one IPv4 host
1407 * if one was found.
1408 */
1409 static int WSAAPI getaddrinfo_stub(const char *node, const char *service,
1410 const struct addrinfo *hints,
1411 struct addrinfo **res)
1412 {
1413 struct hostent *h = NULL;
1414 struct addrinfo *ai;
1415 struct sockaddr_in *sin;
1416
1417 if (node) {
1418 h = gethostbyname(node);
1419 if (!h)
1420 return WSAGetLastError();
1421 }
1422
1423 ai = xmalloc(sizeof(struct addrinfo));
1424 *res = ai;
1425 ai->ai_flags = 0;
1426 ai->ai_family = AF_INET;
1427 ai->ai_socktype = hints ? hints->ai_socktype : 0;
1428 switch (ai->ai_socktype) {
1429 case SOCK_STREAM:
1430 ai->ai_protocol = IPPROTO_TCP;
1431 break;
1432 case SOCK_DGRAM:
1433 ai->ai_protocol = IPPROTO_UDP;
1434 break;
1435 default:
1436 ai->ai_protocol = 0;
1437 break;
1438 }
1439 ai->ai_addrlen = sizeof(struct sockaddr_in);
1440 if (hints && (hints->ai_flags & AI_CANONNAME))
1441 ai->ai_canonname = h ? xstrdup(h->h_name) : NULL;
1442 else
1443 ai->ai_canonname = NULL;
1444
1445 sin = xcalloc(1, ai->ai_addrlen);
1446 sin->sin_family = AF_INET;
1447 /* Note: getaddrinfo is supposed to allow service to be a string,
1448 * which should be looked up using getservbyname. This is
1449 * currently not implemented */
1450 if (service)
1451 sin->sin_port = htons(atoi(service));
1452 if (h)
1453 sin->sin_addr = *(struct in_addr *)h->h_addr;
1454 else if (hints && (hints->ai_flags & AI_PASSIVE))
1455 sin->sin_addr.s_addr = INADDR_ANY;
1456 else
1457 sin->sin_addr.s_addr = INADDR_LOOPBACK;
1458 ai->ai_addr = (struct sockaddr *)sin;
1459 ai->ai_next = NULL;
1460 return 0;
1461 }
1462
1463 static void WSAAPI freeaddrinfo_stub(struct addrinfo *res)
1464 {
1465 free(res->ai_canonname);
1466 free(res->ai_addr);
1467 free(res);
1468 }
1469
1470 static int WSAAPI getnameinfo_stub(const struct sockaddr *sa, socklen_t salen,
1471 char *host, DWORD hostlen,
1472 char *serv, DWORD servlen, int flags)
1473 {
1474 const struct sockaddr_in *sin = (const struct sockaddr_in *)sa;
1475 if (sa->sa_family != AF_INET)
1476 return EAI_FAMILY;
1477 if (!host && !serv)
1478 return EAI_NONAME;
1479
1480 if (host && hostlen > 0) {
1481 struct hostent *ent = NULL;
1482 if (!(flags & NI_NUMERICHOST))
1483 ent = gethostbyaddr((const char *)&sin->sin_addr,
1484 sizeof(sin->sin_addr), AF_INET);
1485
1486 if (ent)
1487 snprintf(host, hostlen, "%s", ent->h_name);
1488 else if (flags & NI_NAMEREQD)
1489 return EAI_NONAME;
1490 else
1491 snprintf(host, hostlen, "%s", inet_ntoa(sin->sin_addr));
1492 }
1493
1494 if (serv && servlen > 0) {
1495 struct servent *ent = NULL;
1496 if (!(flags & NI_NUMERICSERV))
1497 ent = getservbyport(sin->sin_port,
1498 flags & NI_DGRAM ? "udp" : "tcp");
1499
1500 if (ent)
1501 snprintf(serv, servlen, "%s", ent->s_name);
1502 else
1503 snprintf(serv, servlen, "%d", ntohs(sin->sin_port));
1504 }
1505
1506 return 0;
1507 }
1508
1509 static HMODULE ipv6_dll = NULL;
1510 static void (WSAAPI *ipv6_freeaddrinfo)(struct addrinfo *res);
1511 static int (WSAAPI *ipv6_getaddrinfo)(const char *node, const char *service,
1512 const struct addrinfo *hints,
1513 struct addrinfo **res);
1514 static int (WSAAPI *ipv6_getnameinfo)(const struct sockaddr *sa, socklen_t salen,
1515 char *host, DWORD hostlen,
1516 char *serv, DWORD servlen, int flags);
1517 /*
1518 * gai_strerror is an inline function in the ws2tcpip.h header, so we
1519 * don't need to try to load that one dynamically.
1520 */
1521
1522 static void socket_cleanup(void)
1523 {
1524 WSACleanup();
1525 if (ipv6_dll)
1526 FreeLibrary(ipv6_dll);
1527 ipv6_dll = NULL;
1528 ipv6_freeaddrinfo = freeaddrinfo_stub;
1529 ipv6_getaddrinfo = getaddrinfo_stub;
1530 ipv6_getnameinfo = getnameinfo_stub;
1531 }
1532
1533 static void ensure_socket_initialization(void)
1534 {
1535 WSADATA wsa;
1536 static int initialized = 0;
1537 const char *libraries[] = { "ws2_32.dll", "wship6.dll", NULL };
1538 const char **name;
1539
1540 if (initialized)
1541 return;
1542
1543 if (WSAStartup(MAKEWORD(2,2), &wsa))
1544 die("unable to initialize winsock subsystem, error %d",
1545 WSAGetLastError());
1546
1547 for (name = libraries; *name; name++) {
1548 ipv6_dll = LoadLibrary(*name);
1549 if (!ipv6_dll)
1550 continue;
1551
1552 ipv6_freeaddrinfo = (void (WSAAPI *)(struct addrinfo *))
1553 GetProcAddress(ipv6_dll, "freeaddrinfo");
1554 ipv6_getaddrinfo = (int (WSAAPI *)(const char *, const char *,
1555 const struct addrinfo *,
1556 struct addrinfo **))
1557 GetProcAddress(ipv6_dll, "getaddrinfo");
1558 ipv6_getnameinfo = (int (WSAAPI *)(const struct sockaddr *,
1559 socklen_t, char *, DWORD,
1560 char *, DWORD, int))
1561 GetProcAddress(ipv6_dll, "getnameinfo");
1562 if (!ipv6_freeaddrinfo || !ipv6_getaddrinfo || !ipv6_getnameinfo) {
1563 FreeLibrary(ipv6_dll);
1564 ipv6_dll = NULL;
1565 } else
1566 break;
1567 }
1568 if (!ipv6_freeaddrinfo || !ipv6_getaddrinfo || !ipv6_getnameinfo) {
1569 ipv6_freeaddrinfo = freeaddrinfo_stub;
1570 ipv6_getaddrinfo = getaddrinfo_stub;
1571 ipv6_getnameinfo = getnameinfo_stub;
1572 }
1573
1574 atexit(socket_cleanup);
1575 initialized = 1;
1576 }
1577
1578 #undef gethostname
1579 int mingw_gethostname(char *name, int namelen)
1580 {
1581 ensure_socket_initialization();
1582 return gethostname(name, namelen);
1583 }
1584
1585 #undef gethostbyname
1586 struct hostent *mingw_gethostbyname(const char *host)
1587 {
1588 ensure_socket_initialization();
1589 return gethostbyname(host);
1590 }
1591
1592 void mingw_freeaddrinfo(struct addrinfo *res)
1593 {
1594 ipv6_freeaddrinfo(res);
1595 }
1596
1597 int mingw_getaddrinfo(const char *node, const char *service,
1598 const struct addrinfo *hints, struct addrinfo **res)
1599 {
1600 ensure_socket_initialization();
1601 return ipv6_getaddrinfo(node, service, hints, res);
1602 }
1603
1604 int mingw_getnameinfo(const struct sockaddr *sa, socklen_t salen,
1605 char *host, DWORD hostlen, char *serv, DWORD servlen,
1606 int flags)
1607 {
1608 ensure_socket_initialization();
1609 return ipv6_getnameinfo(sa, salen, host, hostlen, serv, servlen, flags);
1610 }
1611
1612 int mingw_socket(int domain, int type, int protocol)
1613 {
1614 int sockfd;
1615 SOCKET s;
1616
1617 ensure_socket_initialization();
1618 s = WSASocket(domain, type, protocol, NULL, 0, 0);
1619 if (s == INVALID_SOCKET) {
1620 /*
1621 * WSAGetLastError() values are regular BSD error codes
1622 * biased by WSABASEERR.
1623 * However, strerror() does not know about networking
1624 * specific errors, which are values beginning at 38 or so.
1625 * Therefore, we choose to leave the biased error code
1626 * in errno so that _if_ someone looks up the code somewhere,
1627 * then it is at least the number that are usually listed.
1628 */
1629 errno = WSAGetLastError();
1630 return -1;
1631 }
1632 /* convert into a file descriptor */
1633 if ((sockfd = _open_osfhandle(s, O_RDWR|O_BINARY)) < 0) {
1634 closesocket(s);
1635 return error("unable to make a socket file descriptor: %s",
1636 strerror(errno));
1637 }
1638 return sockfd;
1639 }
1640
1641 #undef connect
1642 int mingw_connect(int sockfd, struct sockaddr *sa, size_t sz)
1643 {
1644 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
1645 return connect(s, sa, sz);
1646 }
1647
1648 #undef bind
1649 int mingw_bind(int sockfd, struct sockaddr *sa, size_t sz)
1650 {
1651 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
1652 return bind(s, sa, sz);
1653 }
1654
1655 #undef setsockopt
1656 int mingw_setsockopt(int sockfd, int lvl, int optname, void *optval, int optlen)
1657 {
1658 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
1659 return setsockopt(s, lvl, optname, (const char*)optval, optlen);
1660 }
1661
1662 #undef shutdown
1663 int mingw_shutdown(int sockfd, int how)
1664 {
1665 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
1666 return shutdown(s, how);
1667 }
1668
1669 #undef listen
1670 int mingw_listen(int sockfd, int backlog)
1671 {
1672 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
1673 return listen(s, backlog);
1674 }
1675
1676 #undef accept
1677 int mingw_accept(int sockfd1, struct sockaddr *sa, socklen_t *sz)
1678 {
1679 int sockfd2;
1680
1681 SOCKET s1 = (SOCKET)_get_osfhandle(sockfd1);
1682 SOCKET s2 = accept(s1, sa, sz);
1683
1684 /* convert into a file descriptor */
1685 if ((sockfd2 = _open_osfhandle(s2, O_RDWR|O_BINARY)) < 0) {
1686 int err = errno;
1687 closesocket(s2);
1688 return error("unable to make a socket file descriptor: %s",
1689 strerror(err));
1690 }
1691 return sockfd2;
1692 }
1693
1694 #undef rename
1695 int mingw_rename(const char *pold, const char *pnew)
1696 {
1697 DWORD attrs, gle;
1698 int tries = 0;
1699 wchar_t wpold[MAX_PATH], wpnew[MAX_PATH];
1700 if (xutftowcs_path(wpold, pold) < 0 || xutftowcs_path(wpnew, pnew) < 0)
1701 return -1;
1702
1703 /*
1704 * Try native rename() first to get errno right.
1705 * It is based on MoveFile(), which cannot overwrite existing files.
1706 */
1707 if (!_wrename(wpold, wpnew))
1708 return 0;
1709 if (errno != EEXIST)
1710 return -1;
1711 repeat:
1712 if (MoveFileExW(wpold, wpnew, MOVEFILE_REPLACE_EXISTING))
1713 return 0;
1714 /* TODO: translate more errors */
1715 gle = GetLastError();
1716 if (gle == ERROR_ACCESS_DENIED &&
1717 (attrs = GetFileAttributesW(wpnew)) != INVALID_FILE_ATTRIBUTES) {
1718 if (attrs & FILE_ATTRIBUTE_DIRECTORY) {
1719 DWORD attrsold = GetFileAttributesW(wpold);
1720 if (attrsold == INVALID_FILE_ATTRIBUTES ||
1721 !(attrsold & FILE_ATTRIBUTE_DIRECTORY))
1722 errno = EISDIR;
1723 else if (!_wrmdir(wpnew))
1724 goto repeat;
1725 return -1;
1726 }
1727 if ((attrs & FILE_ATTRIBUTE_READONLY) &&
1728 SetFileAttributesW(wpnew, attrs & ~FILE_ATTRIBUTE_READONLY)) {
1729 if (MoveFileExW(wpold, wpnew, MOVEFILE_REPLACE_EXISTING))
1730 return 0;
1731 gle = GetLastError();
1732 /* revert file attributes on failure */
1733 SetFileAttributesW(wpnew, attrs);
1734 }
1735 }
1736 if (tries < ARRAY_SIZE(delay) && gle == ERROR_ACCESS_DENIED) {
1737 /*
1738 * We assume that some other process had the source or
1739 * destination file open at the wrong moment and retry.
1740 * In order to give the other process a higher chance to
1741 * complete its operation, we give up our time slice now.
1742 * If we have to retry again, we do sleep a bit.
1743 */
1744 Sleep(delay[tries]);
1745 tries++;
1746 goto repeat;
1747 }
1748 if (gle == ERROR_ACCESS_DENIED &&
1749 ask_yes_no_if_possible("Rename from '%s' to '%s' failed. "
1750 "Should I try again?", pold, pnew))
1751 goto repeat;
1752
1753 errno = EACCES;
1754 return -1;
1755 }
1756
1757 /*
1758 * Note that this doesn't return the actual pagesize, but
1759 * the allocation granularity. If future Windows specific git code
1760 * needs the real getpagesize function, we need to find another solution.
1761 */
1762 int mingw_getpagesize(void)
1763 {
1764 SYSTEM_INFO si;
1765 GetSystemInfo(&si);
1766 return si.dwAllocationGranularity;
1767 }
1768
1769 struct passwd *getpwuid(int uid)
1770 {
1771 static char user_name[100];
1772 static struct passwd p;
1773
1774 DWORD len = sizeof(user_name);
1775 if (!GetUserName(user_name, &len))
1776 return NULL;
1777 p.pw_name = user_name;
1778 p.pw_gecos = "unknown";
1779 p.pw_dir = NULL;
1780 return &p;
1781 }
1782
1783 static HANDLE timer_event;
1784 static HANDLE timer_thread;
1785 static int timer_interval;
1786 static int one_shot;
1787 static sig_handler_t timer_fn = SIG_DFL, sigint_fn = SIG_DFL;
1788
1789 /* The timer works like this:
1790 * The thread, ticktack(), is a trivial routine that most of the time
1791 * only waits to receive the signal to terminate. The main thread tells
1792 * the thread to terminate by setting the timer_event to the signalled
1793 * state.
1794 * But ticktack() interrupts the wait state after the timer's interval
1795 * length to call the signal handler.
1796 */
1797
1798 static unsigned __stdcall ticktack(void *dummy)
1799 {
1800 while (WaitForSingleObject(timer_event, timer_interval) == WAIT_TIMEOUT) {
1801 mingw_raise(SIGALRM);
1802 if (one_shot)
1803 break;
1804 }
1805 return 0;
1806 }
1807
1808 static int start_timer_thread(void)
1809 {
1810 timer_event = CreateEvent(NULL, FALSE, FALSE, NULL);
1811 if (timer_event) {
1812 timer_thread = (HANDLE) _beginthreadex(NULL, 0, ticktack, NULL, 0, NULL);
1813 if (!timer_thread )
1814 return errno = ENOMEM,
1815 error("cannot start timer thread");
1816 } else
1817 return errno = ENOMEM,
1818 error("cannot allocate resources for timer");
1819 return 0;
1820 }
1821
1822 static void stop_timer_thread(void)
1823 {
1824 if (timer_event)
1825 SetEvent(timer_event); /* tell thread to terminate */
1826 if (timer_thread) {
1827 int rc = WaitForSingleObject(timer_thread, 1000);
1828 if (rc == WAIT_TIMEOUT)
1829 error("timer thread did not terminate timely");
1830 else if (rc != WAIT_OBJECT_0)
1831 error("waiting for timer thread failed: %lu",
1832 GetLastError());
1833 CloseHandle(timer_thread);
1834 }
1835 if (timer_event)
1836 CloseHandle(timer_event);
1837 timer_event = NULL;
1838 timer_thread = NULL;
1839 }
1840
1841 static inline int is_timeval_eq(const struct timeval *i1, const struct timeval *i2)
1842 {
1843 return i1->tv_sec == i2->tv_sec && i1->tv_usec == i2->tv_usec;
1844 }
1845
1846 int setitimer(int type, struct itimerval *in, struct itimerval *out)
1847 {
1848 static const struct timeval zero;
1849 static int atexit_done;
1850
1851 if (out != NULL)
1852 return errno = EINVAL,
1853 error("setitimer param 3 != NULL not implemented");
1854 if (!is_timeval_eq(&in->it_interval, &zero) &&
1855 !is_timeval_eq(&in->it_interval, &in->it_value))
1856 return errno = EINVAL,
1857 error("setitimer: it_interval must be zero or eq it_value");
1858
1859 if (timer_thread)
1860 stop_timer_thread();
1861
1862 if (is_timeval_eq(&in->it_value, &zero) &&
1863 is_timeval_eq(&in->it_interval, &zero))
1864 return 0;
1865
1866 timer_interval = in->it_value.tv_sec * 1000 + in->it_value.tv_usec / 1000;
1867 one_shot = is_timeval_eq(&in->it_interval, &zero);
1868 if (!atexit_done) {
1869 atexit(stop_timer_thread);
1870 atexit_done = 1;
1871 }
1872 return start_timer_thread();
1873 }
1874
1875 int sigaction(int sig, struct sigaction *in, struct sigaction *out)
1876 {
1877 if (sig != SIGALRM)
1878 return errno = EINVAL,
1879 error("sigaction only implemented for SIGALRM");
1880 if (out != NULL)
1881 return errno = EINVAL,
1882 error("sigaction: param 3 != NULL not implemented");
1883
1884 timer_fn = in->sa_handler;
1885 return 0;
1886 }
1887
1888 #undef signal
1889 sig_handler_t mingw_signal(int sig, sig_handler_t handler)
1890 {
1891 sig_handler_t old;
1892
1893 switch (sig) {
1894 case SIGALRM:
1895 old = timer_fn;
1896 timer_fn = handler;
1897 break;
1898
1899 case SIGINT:
1900 old = sigint_fn;
1901 sigint_fn = handler;
1902 break;
1903
1904 default:
1905 return signal(sig, handler);
1906 }
1907
1908 return old;
1909 }
1910
1911 #undef raise
1912 int mingw_raise(int sig)
1913 {
1914 switch (sig) {
1915 case SIGALRM:
1916 if (timer_fn == SIG_DFL) {
1917 if (isatty(STDERR_FILENO))
1918 fputs("Alarm clock\n", stderr);
1919 exit(128 + SIGALRM);
1920 } else if (timer_fn != SIG_IGN)
1921 timer_fn(SIGALRM);
1922 return 0;
1923
1924 case SIGINT:
1925 if (sigint_fn == SIG_DFL)
1926 exit(128 + SIGINT);
1927 else if (sigint_fn != SIG_IGN)
1928 sigint_fn(SIGINT);
1929 return 0;
1930
1931 default:
1932 return raise(sig);
1933 }
1934 }
1935
1936
1937 static const char *make_backslash_path(const char *path)
1938 {
1939 static char buf[PATH_MAX + 1];
1940 char *c;
1941
1942 if (strlcpy(buf, path, PATH_MAX) >= PATH_MAX)
1943 die("Too long path: %.*s", 60, path);
1944
1945 for (c = buf; *c; c++) {
1946 if (*c == '/')
1947 *c = '\\';
1948 }
1949 return buf;
1950 }
1951
1952 void mingw_open_html(const char *unixpath)
1953 {
1954 const char *htmlpath = make_backslash_path(unixpath);
1955 typedef HINSTANCE (WINAPI *T)(HWND, const char *,
1956 const char *, const char *, const char *, INT);
1957 T ShellExecute;
1958 HMODULE shell32;
1959 int r;
1960
1961 shell32 = LoadLibrary("shell32.dll");
1962 if (!shell32)
1963 die("cannot load shell32.dll");
1964 ShellExecute = (T)GetProcAddress(shell32, "ShellExecuteA");
1965 if (!ShellExecute)
1966 die("cannot run browser");
1967
1968 printf("Launching default browser to display HTML ...\n");
1969 r = HCAST(int, ShellExecute(NULL, "open", htmlpath,
1970 NULL, "\\", SW_SHOWNORMAL));
1971 FreeLibrary(shell32);
1972 /* see the MSDN documentation referring to the result codes here */
1973 if (r <= 32) {
1974 die("failed to launch browser for %.*s", MAX_PATH, unixpath);
1975 }
1976 }
1977
1978 int link(const char *oldpath, const char *newpath)
1979 {
1980 typedef BOOL (WINAPI *T)(LPCWSTR, LPCWSTR, LPSECURITY_ATTRIBUTES);
1981 static T create_hard_link = NULL;
1982 wchar_t woldpath[MAX_PATH], wnewpath[MAX_PATH];
1983 if (xutftowcs_path(woldpath, oldpath) < 0 ||
1984 xutftowcs_path(wnewpath, newpath) < 0)
1985 return -1;
1986
1987 if (!create_hard_link) {
1988 create_hard_link = (T) GetProcAddress(
1989 GetModuleHandle("kernel32.dll"), "CreateHardLinkW");
1990 if (!create_hard_link)
1991 create_hard_link = (T)-1;
1992 }
1993 if (create_hard_link == (T)-1) {
1994 errno = ENOSYS;
1995 return -1;
1996 }
1997 if (!create_hard_link(wnewpath, woldpath, NULL)) {
1998 errno = err_win_to_posix(GetLastError());
1999 return -1;
2000 }
2001 return 0;
2002 }
2003
2004 pid_t waitpid(pid_t pid, int *status, int options)
2005 {
2006 HANDLE h = OpenProcess(SYNCHRONIZE | PROCESS_QUERY_INFORMATION,
2007 FALSE, pid);
2008 if (!h) {
2009 errno = ECHILD;
2010 return -1;
2011 }
2012
2013 if (pid > 0 && options & WNOHANG) {
2014 if (WAIT_OBJECT_0 != WaitForSingleObject(h, 0)) {
2015 CloseHandle(h);
2016 return 0;
2017 }
2018 options &= ~WNOHANG;
2019 }
2020
2021 if (options == 0) {
2022 struct pinfo_t **ppinfo;
2023 if (WaitForSingleObject(h, INFINITE) != WAIT_OBJECT_0) {
2024 CloseHandle(h);
2025 return 0;
2026 }
2027
2028 if (status)
2029 GetExitCodeProcess(h, (LPDWORD)status);
2030
2031 EnterCriticalSection(&pinfo_cs);
2032
2033 ppinfo = &pinfo;
2034 while (*ppinfo) {
2035 struct pinfo_t *info = *ppinfo;
2036 if (info->pid == pid) {
2037 CloseHandle(info->proc);
2038 *ppinfo = info->next;
2039 free(info);
2040 break;
2041 }
2042 ppinfo = &info->next;
2043 }
2044
2045 LeaveCriticalSection(&pinfo_cs);
2046
2047 CloseHandle(h);
2048 return pid;
2049 }
2050 CloseHandle(h);
2051
2052 errno = EINVAL;
2053 return -1;
2054 }
2055
2056 int mingw_skip_dos_drive_prefix(char **path)
2057 {
2058 int ret = has_dos_drive_prefix(*path);
2059 *path += ret;
2060 return ret;
2061 }
2062
2063 int mingw_offset_1st_component(const char *path)
2064 {
2065 char *pos = (char *)path;
2066
2067 /* unc paths */
2068 if (!skip_dos_drive_prefix(&pos) &&
2069 is_dir_sep(pos[0]) && is_dir_sep(pos[1])) {
2070 /* skip server name */
2071 pos = strpbrk(pos + 2, "\\/");
2072 if (!pos)
2073 return 0; /* Error: malformed unc path */
2074
2075 do {
2076 pos++;
2077 } while (*pos && !is_dir_sep(*pos));
2078 }
2079
2080 return pos + is_dir_sep(*pos) - path;
2081 }
2082
2083 int xutftowcsn(wchar_t *wcs, const char *utfs, size_t wcslen, int utflen)
2084 {
2085 int upos = 0, wpos = 0;
2086 const unsigned char *utf = (const unsigned char*) utfs;
2087 if (!utf || !wcs || wcslen < 1) {
2088 errno = EINVAL;
2089 return -1;
2090 }
2091 /* reserve space for \0 */
2092 wcslen--;
2093 if (utflen < 0)
2094 utflen = INT_MAX;
2095
2096 while (upos < utflen) {
2097 int c = utf[upos++] & 0xff;
2098 if (utflen == INT_MAX && c == 0)
2099 break;
2100
2101 if (wpos >= wcslen) {
2102 wcs[wpos] = 0;
2103 errno = ERANGE;
2104 return -1;
2105 }
2106
2107 if (c < 0x80) {
2108 /* ASCII */
2109 wcs[wpos++] = c;
2110 } else if (c >= 0xc2 && c < 0xe0 && upos < utflen &&
2111 (utf[upos] & 0xc0) == 0x80) {
2112 /* 2-byte utf-8 */
2113 c = ((c & 0x1f) << 6);
2114 c |= (utf[upos++] & 0x3f);
2115 wcs[wpos++] = c;
2116 } else if (c >= 0xe0 && c < 0xf0 && upos + 1 < utflen &&
2117 !(c == 0xe0 && utf[upos] < 0xa0) && /* over-long encoding */
2118 (utf[upos] & 0xc0) == 0x80 &&
2119 (utf[upos + 1] & 0xc0) == 0x80) {
2120 /* 3-byte utf-8 */
2121 c = ((c & 0x0f) << 12);
2122 c |= ((utf[upos++] & 0x3f) << 6);
2123 c |= (utf[upos++] & 0x3f);
2124 wcs[wpos++] = c;
2125 } else if (c >= 0xf0 && c < 0xf5 && upos + 2 < utflen &&
2126 wpos + 1 < wcslen &&
2127 !(c == 0xf0 && utf[upos] < 0x90) && /* over-long encoding */
2128 !(c == 0xf4 && utf[upos] >= 0x90) && /* > \u10ffff */
2129 (utf[upos] & 0xc0) == 0x80 &&
2130 (utf[upos + 1] & 0xc0) == 0x80 &&
2131 (utf[upos + 2] & 0xc0) == 0x80) {
2132 /* 4-byte utf-8: convert to \ud8xx \udcxx surrogate pair */
2133 c = ((c & 0x07) << 18);
2134 c |= ((utf[upos++] & 0x3f) << 12);
2135 c |= ((utf[upos++] & 0x3f) << 6);
2136 c |= (utf[upos++] & 0x3f);
2137 c -= 0x10000;
2138 wcs[wpos++] = 0xd800 | (c >> 10);
2139 wcs[wpos++] = 0xdc00 | (c & 0x3ff);
2140 } else if (c >= 0xa0) {
2141 /* invalid utf-8 byte, printable unicode char: convert 1:1 */
2142 wcs[wpos++] = c;
2143 } else {
2144 /* invalid utf-8 byte, non-printable unicode: convert to hex */
2145 static const char *hex = "0123456789abcdef";
2146 wcs[wpos++] = hex[c >> 4];
2147 if (wpos < wcslen)
2148 wcs[wpos++] = hex[c & 0x0f];
2149 }
2150 }
2151 wcs[wpos] = 0;
2152 return wpos;
2153 }
2154
2155 int xwcstoutf(char *utf, const wchar_t *wcs, size_t utflen)
2156 {
2157 if (!wcs || !utf || utflen < 1) {
2158 errno = EINVAL;
2159 return -1;
2160 }
2161 utflen = WideCharToMultiByte(CP_UTF8, 0, wcs, -1, utf, utflen, NULL, NULL);
2162 if (utflen)
2163 return utflen - 1;
2164 errno = ERANGE;
2165 return -1;
2166 }
2167
2168 static void setup_windows_environment()
2169 {
2170 char *tmp = getenv("TMPDIR");
2171
2172 /* on Windows it is TMP and TEMP */
2173 if (!tmp) {
2174 if (!(tmp = getenv("TMP")))
2175 tmp = getenv("TEMP");
2176 if (tmp) {
2177 setenv("TMPDIR", tmp, 1);
2178 tmp = getenv("TMPDIR");
2179 }
2180 }
2181
2182 if (tmp) {
2183 /*
2184 * Convert all dir separators to forward slashes,
2185 * to help shell commands called from the Git
2186 * executable (by not mistaking the dir separators
2187 * for escape characters).
2188 */
2189 for (; *tmp; tmp++)
2190 if (*tmp == '\\')
2191 *tmp = '/';
2192 }
2193
2194 /* simulate TERM to enable auto-color (see color.c) */
2195 if (!getenv("TERM"))
2196 setenv("TERM", "cygwin", 1);
2197 }
2198
2199 /*
2200 * Disable MSVCRT command line wildcard expansion (__getmainargs called from
2201 * mingw startup code, see init.c in mingw runtime).
2202 */
2203 int _CRT_glob = 0;
2204
2205 typedef struct {
2206 int newmode;
2207 } _startupinfo;
2208
2209 extern int __wgetmainargs(int *argc, wchar_t ***argv, wchar_t ***env, int glob,
2210 _startupinfo *si);
2211
2212 static NORETURN void die_startup()
2213 {
2214 fputs("fatal: not enough memory for initialization", stderr);
2215 exit(128);
2216 }
2217
2218 static void *malloc_startup(size_t size)
2219 {
2220 void *result = malloc(size);
2221 if (!result)
2222 die_startup();
2223 return result;
2224 }
2225
2226 static char *wcstoutfdup_startup(char *buffer, const wchar_t *wcs, size_t len)
2227 {
2228 len = xwcstoutf(buffer, wcs, len) + 1;
2229 return memcpy(malloc_startup(len), buffer, len);
2230 }
2231
2232 void mingw_startup()
2233 {
2234 int i, maxlen, argc;
2235 char *buffer;
2236 wchar_t **wenv, **wargv;
2237 _startupinfo si;
2238
2239 /* get wide char arguments and environment */
2240 si.newmode = 0;
2241 if (__wgetmainargs(&argc, &wargv, &wenv, _CRT_glob, &si) < 0)
2242 die_startup();
2243
2244 /* determine size of argv and environ conversion buffer */
2245 maxlen = wcslen(_wpgmptr);
2246 for (i = 1; i < argc; i++)
2247 maxlen = max(maxlen, wcslen(wargv[i]));
2248 for (i = 0; wenv[i]; i++)
2249 maxlen = max(maxlen, wcslen(wenv[i]));
2250
2251 /*
2252 * nedmalloc can't free CRT memory, allocate resizable environment
2253 * list. Note that xmalloc / xmemdupz etc. call getenv, so we cannot
2254 * use it while initializing the environment itself.
2255 */
2256 environ_size = i + 1;
2257 environ_alloc = alloc_nr(environ_size * sizeof(char*));
2258 environ = malloc_startup(environ_alloc);
2259
2260 /* allocate buffer (wchar_t encodes to max 3 UTF-8 bytes) */
2261 maxlen = 3 * maxlen + 1;
2262 buffer = malloc_startup(maxlen);
2263
2264 /* convert command line arguments and environment to UTF-8 */
2265 __argv[0] = wcstoutfdup_startup(buffer, _wpgmptr, maxlen);
2266 for (i = 1; i < argc; i++)
2267 __argv[i] = wcstoutfdup_startup(buffer, wargv[i], maxlen);
2268 for (i = 0; wenv[i]; i++)
2269 environ[i] = wcstoutfdup_startup(buffer, wenv[i], maxlen);
2270 environ[i] = NULL;
2271 free(buffer);
2272
2273 /* sort environment for O(log n) getenv / putenv */
2274 qsort(environ, i, sizeof(char*), compareenv);
2275
2276 /* fix Windows specific environment settings */
2277 setup_windows_environment();
2278
2279 /* initialize critical section for waitpid pinfo_t list */
2280 InitializeCriticalSection(&pinfo_cs);
2281
2282 /* set up default file mode and file modes for stdin/out/err */
2283 _fmode = _O_BINARY;
2284 _setmode(_fileno(stdin), _O_BINARY);
2285 _setmode(_fileno(stdout), _O_BINARY);
2286 _setmode(_fileno(stderr), _O_BINARY);
2287
2288 /* initialize Unicode console */
2289 winansi_init();
2290 }
2291
2292 int uname(struct utsname *buf)
2293 {
2294 unsigned v = (unsigned)GetVersion();
2295 memset(buf, 0, sizeof(*buf));
2296 xsnprintf(buf->sysname, sizeof(buf->sysname), "Windows");
2297 xsnprintf(buf->release, sizeof(buf->release),
2298 "%u.%u", v & 0xff, (v >> 8) & 0xff);
2299 /* assuming NT variants only.. */
2300 xsnprintf(buf->version, sizeof(buf->version),
2301 "%u", (v >> 16) & 0x7fff);
2302 return 0;
2303 }