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[thirdparty/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
337 if (!is_valid_win32_path(path)) {
338 errno = EINVAL;
339 return -1;
340 }
341
342 if (xutftowcs_path(wpath, path) < 0)
343 return -1;
344 ret = _wmkdir(wpath);
345 if (!ret && needs_hiding(path))
346 return set_hidden_flag(wpath, 1);
347 return ret;
348 }
349
350 int mingw_open (const char *filename, int oflags, ...)
351 {
352 va_list args;
353 unsigned mode;
354 int fd, create = (oflags & (O_CREAT | O_EXCL)) == (O_CREAT | O_EXCL);
355 wchar_t wfilename[MAX_PATH];
356
357 va_start(args, oflags);
358 mode = va_arg(args, int);
359 va_end(args);
360
361 if (!is_valid_win32_path(filename)) {
362 errno = create ? EINVAL : ENOENT;
363 return -1;
364 }
365
366 if (filename && !strcmp(filename, "/dev/null"))
367 filename = "nul";
368
369 if (xutftowcs_path(wfilename, filename) < 0)
370 return -1;
371 fd = _wopen(wfilename, oflags, mode);
372
373 if (fd < 0 && (oflags & O_ACCMODE) != O_RDONLY && errno == EACCES) {
374 DWORD attrs = GetFileAttributesW(wfilename);
375 if (attrs != INVALID_FILE_ATTRIBUTES && (attrs & FILE_ATTRIBUTE_DIRECTORY))
376 errno = EISDIR;
377 }
378 if ((oflags & O_CREAT) && needs_hiding(filename)) {
379 /*
380 * Internally, _wopen() uses the CreateFile() API which errors
381 * out with an ERROR_ACCESS_DENIED if CREATE_ALWAYS was
382 * specified and an already existing file's attributes do not
383 * match *exactly*. As there is no mode or flag we can set that
384 * would correspond to FILE_ATTRIBUTE_HIDDEN, let's just try
385 * again *without* the O_CREAT flag (that corresponds to the
386 * CREATE_ALWAYS flag of CreateFile()).
387 */
388 if (fd < 0 && errno == EACCES)
389 fd = _wopen(wfilename, oflags & ~O_CREAT, mode);
390 if (fd >= 0 && set_hidden_flag(wfilename, 1))
391 warning("could not mark '%s' as hidden.", filename);
392 }
393 return fd;
394 }
395
396 static BOOL WINAPI ctrl_ignore(DWORD type)
397 {
398 return TRUE;
399 }
400
401 #undef fgetc
402 int mingw_fgetc(FILE *stream)
403 {
404 int ch;
405 if (!isatty(_fileno(stream)))
406 return fgetc(stream);
407
408 SetConsoleCtrlHandler(ctrl_ignore, TRUE);
409 while (1) {
410 ch = fgetc(stream);
411 if (ch != EOF || GetLastError() != ERROR_OPERATION_ABORTED)
412 break;
413
414 /* Ctrl+C was pressed, simulate SIGINT and retry */
415 mingw_raise(SIGINT);
416 }
417 SetConsoleCtrlHandler(ctrl_ignore, FALSE);
418 return ch;
419 }
420
421 #undef fopen
422 FILE *mingw_fopen (const char *filename, const char *otype)
423 {
424 int hide = needs_hiding(filename);
425 FILE *file;
426 wchar_t wfilename[MAX_PATH], wotype[4];
427 if (!is_valid_win32_path(filename)) {
428 int create = otype && strchr(otype, 'w');
429 errno = create ? EINVAL : ENOENT;
430 return NULL;
431 }
432 if (filename && !strcmp(filename, "/dev/null"))
433 filename = "nul";
434 if (xutftowcs_path(wfilename, filename) < 0 ||
435 xutftowcs(wotype, otype, ARRAY_SIZE(wotype)) < 0)
436 return NULL;
437 if (hide && !access(filename, F_OK) && set_hidden_flag(wfilename, 0)) {
438 error("could not unhide %s", filename);
439 return NULL;
440 }
441 file = _wfopen(wfilename, wotype);
442 if (!file && GetLastError() == ERROR_INVALID_NAME)
443 errno = ENOENT;
444 if (file && hide && set_hidden_flag(wfilename, 1))
445 warning("could not mark '%s' as hidden.", filename);
446 return file;
447 }
448
449 FILE *mingw_freopen (const char *filename, const char *otype, FILE *stream)
450 {
451 int hide = needs_hiding(filename);
452 FILE *file;
453 wchar_t wfilename[MAX_PATH], wotype[4];
454 if (!is_valid_win32_path(filename)) {
455 int create = otype && strchr(otype, 'w');
456 errno = create ? EINVAL : ENOENT;
457 return NULL;
458 }
459 if (filename && !strcmp(filename, "/dev/null"))
460 filename = "nul";
461 if (xutftowcs_path(wfilename, filename) < 0 ||
462 xutftowcs(wotype, otype, ARRAY_SIZE(wotype)) < 0)
463 return NULL;
464 if (hide && !access(filename, F_OK) && set_hidden_flag(wfilename, 0)) {
465 error("could not unhide %s", filename);
466 return NULL;
467 }
468 file = _wfreopen(wfilename, wotype, stream);
469 if (file && hide && set_hidden_flag(wfilename, 1))
470 warning("could not mark '%s' as hidden.", filename);
471 return file;
472 }
473
474 #undef fflush
475 int mingw_fflush(FILE *stream)
476 {
477 int ret = fflush(stream);
478
479 /*
480 * write() is used behind the scenes of stdio output functions.
481 * Since git code does not check for errors after each stdio write
482 * operation, it can happen that write() is called by a later
483 * stdio function even if an earlier write() call failed. In the
484 * case of a pipe whose readable end was closed, only the first
485 * call to write() reports EPIPE on Windows. Subsequent write()
486 * calls report EINVAL. It is impossible to notice whether this
487 * fflush invocation triggered such a case, therefore, we have to
488 * catch all EINVAL errors whole-sale.
489 */
490 if (ret && errno == EINVAL)
491 errno = EPIPE;
492
493 return ret;
494 }
495
496 #undef write
497 ssize_t mingw_write(int fd, const void *buf, size_t len)
498 {
499 ssize_t result = write(fd, buf, len);
500
501 if (result < 0 && errno == EINVAL && buf) {
502 /* check if fd is a pipe */
503 HANDLE h = (HANDLE) _get_osfhandle(fd);
504 if (GetFileType(h) == FILE_TYPE_PIPE)
505 errno = EPIPE;
506 else
507 errno = EINVAL;
508 }
509
510 return result;
511 }
512
513 int mingw_access(const char *filename, int mode)
514 {
515 wchar_t wfilename[MAX_PATH];
516 if (xutftowcs_path(wfilename, filename) < 0)
517 return -1;
518 /* X_OK is not supported by the MSVCRT version */
519 return _waccess(wfilename, mode & ~X_OK);
520 }
521
522 int mingw_chdir(const char *dirname)
523 {
524 wchar_t wdirname[MAX_PATH];
525 if (xutftowcs_path(wdirname, dirname) < 0)
526 return -1;
527 return _wchdir(wdirname);
528 }
529
530 int mingw_chmod(const char *filename, int mode)
531 {
532 wchar_t wfilename[MAX_PATH];
533 if (xutftowcs_path(wfilename, filename) < 0)
534 return -1;
535 return _wchmod(wfilename, mode);
536 }
537
538 /*
539 * The unit of FILETIME is 100-nanoseconds since January 1, 1601, UTC.
540 * Returns the 100-nanoseconds ("hekto nanoseconds") since the epoch.
541 */
542 static inline long long filetime_to_hnsec(const FILETIME *ft)
543 {
544 long long winTime = ((long long)ft->dwHighDateTime << 32) + ft->dwLowDateTime;
545 /* Windows to Unix Epoch conversion */
546 return winTime - 116444736000000000LL;
547 }
548
549 static inline time_t filetime_to_time_t(const FILETIME *ft)
550 {
551 return (time_t)(filetime_to_hnsec(ft) / 10000000);
552 }
553
554 /**
555 * Verifies that safe_create_leading_directories() would succeed.
556 */
557 static int has_valid_directory_prefix(wchar_t *wfilename)
558 {
559 int n = wcslen(wfilename);
560
561 while (n > 0) {
562 wchar_t c = wfilename[--n];
563 DWORD attributes;
564
565 if (!is_dir_sep(c))
566 continue;
567
568 wfilename[n] = L'\0';
569 attributes = GetFileAttributesW(wfilename);
570 wfilename[n] = c;
571 if (attributes == FILE_ATTRIBUTE_DIRECTORY ||
572 attributes == FILE_ATTRIBUTE_DEVICE)
573 return 1;
574 if (attributes == INVALID_FILE_ATTRIBUTES)
575 switch (GetLastError()) {
576 case ERROR_PATH_NOT_FOUND:
577 continue;
578 case ERROR_FILE_NOT_FOUND:
579 /* This implies parent directory exists. */
580 return 1;
581 }
582 return 0;
583 }
584 return 1;
585 }
586
587 /* We keep the do_lstat code in a separate function to avoid recursion.
588 * When a path ends with a slash, the stat will fail with ENOENT. In
589 * this case, we strip the trailing slashes and stat again.
590 *
591 * If follow is true then act like stat() and report on the link
592 * target. Otherwise report on the link itself.
593 */
594 static int do_lstat(int follow, const char *file_name, struct stat *buf)
595 {
596 WIN32_FILE_ATTRIBUTE_DATA fdata;
597 wchar_t wfilename[MAX_PATH];
598 if (xutftowcs_path(wfilename, file_name) < 0)
599 return -1;
600
601 if (GetFileAttributesExW(wfilename, GetFileExInfoStandard, &fdata)) {
602 buf->st_ino = 0;
603 buf->st_gid = 0;
604 buf->st_uid = 0;
605 buf->st_nlink = 1;
606 buf->st_mode = file_attr_to_st_mode(fdata.dwFileAttributes);
607 buf->st_size = fdata.nFileSizeLow |
608 (((off_t)fdata.nFileSizeHigh)<<32);
609 buf->st_dev = buf->st_rdev = 0; /* not used by Git */
610 buf->st_atime = filetime_to_time_t(&(fdata.ftLastAccessTime));
611 buf->st_mtime = filetime_to_time_t(&(fdata.ftLastWriteTime));
612 buf->st_ctime = filetime_to_time_t(&(fdata.ftCreationTime));
613 if (fdata.dwFileAttributes & FILE_ATTRIBUTE_REPARSE_POINT) {
614 WIN32_FIND_DATAW findbuf;
615 HANDLE handle = FindFirstFileW(wfilename, &findbuf);
616 if (handle != INVALID_HANDLE_VALUE) {
617 if ((findbuf.dwFileAttributes & FILE_ATTRIBUTE_REPARSE_POINT) &&
618 (findbuf.dwReserved0 == IO_REPARSE_TAG_SYMLINK)) {
619 if (follow) {
620 char buffer[MAXIMUM_REPARSE_DATA_BUFFER_SIZE];
621 buf->st_size = readlink(file_name, buffer, MAXIMUM_REPARSE_DATA_BUFFER_SIZE);
622 } else {
623 buf->st_mode = S_IFLNK;
624 }
625 buf->st_mode |= S_IREAD;
626 if (!(findbuf.dwFileAttributes & FILE_ATTRIBUTE_READONLY))
627 buf->st_mode |= S_IWRITE;
628 }
629 FindClose(handle);
630 }
631 }
632 return 0;
633 }
634 switch (GetLastError()) {
635 case ERROR_ACCESS_DENIED:
636 case ERROR_SHARING_VIOLATION:
637 case ERROR_LOCK_VIOLATION:
638 case ERROR_SHARING_BUFFER_EXCEEDED:
639 errno = EACCES;
640 break;
641 case ERROR_BUFFER_OVERFLOW:
642 errno = ENAMETOOLONG;
643 break;
644 case ERROR_NOT_ENOUGH_MEMORY:
645 errno = ENOMEM;
646 break;
647 case ERROR_PATH_NOT_FOUND:
648 if (!has_valid_directory_prefix(wfilename)) {
649 errno = ENOTDIR;
650 break;
651 }
652 /* fallthru */
653 default:
654 errno = ENOENT;
655 break;
656 }
657 return -1;
658 }
659
660 /* We provide our own lstat/fstat functions, since the provided
661 * lstat/fstat functions are so slow. These stat functions are
662 * tailored for Git's usage (read: fast), and are not meant to be
663 * complete. Note that Git stat()s are redirected to mingw_lstat()
664 * too, since Windows doesn't really handle symlinks that well.
665 */
666 static int do_stat_internal(int follow, const char *file_name, struct stat *buf)
667 {
668 int namelen;
669 char alt_name[PATH_MAX];
670
671 if (!do_lstat(follow, file_name, buf))
672 return 0;
673
674 /* if file_name ended in a '/', Windows returned ENOENT;
675 * try again without trailing slashes
676 */
677 if (errno != ENOENT)
678 return -1;
679
680 namelen = strlen(file_name);
681 if (namelen && file_name[namelen-1] != '/')
682 return -1;
683 while (namelen && file_name[namelen-1] == '/')
684 --namelen;
685 if (!namelen || namelen >= PATH_MAX)
686 return -1;
687
688 memcpy(alt_name, file_name, namelen);
689 alt_name[namelen] = 0;
690 return do_lstat(follow, alt_name, buf);
691 }
692
693 int mingw_lstat(const char *file_name, struct stat *buf)
694 {
695 return do_stat_internal(0, file_name, buf);
696 }
697 int mingw_stat(const char *file_name, struct stat *buf)
698 {
699 return do_stat_internal(1, file_name, buf);
700 }
701
702 int mingw_fstat(int fd, struct stat *buf)
703 {
704 HANDLE fh = (HANDLE)_get_osfhandle(fd);
705 BY_HANDLE_FILE_INFORMATION fdata;
706
707 if (fh == INVALID_HANDLE_VALUE) {
708 errno = EBADF;
709 return -1;
710 }
711 /* direct non-file handles to MS's fstat() */
712 if (GetFileType(fh) != FILE_TYPE_DISK)
713 return _fstati64(fd, buf);
714
715 if (GetFileInformationByHandle(fh, &fdata)) {
716 buf->st_ino = 0;
717 buf->st_gid = 0;
718 buf->st_uid = 0;
719 buf->st_nlink = 1;
720 buf->st_mode = file_attr_to_st_mode(fdata.dwFileAttributes);
721 buf->st_size = fdata.nFileSizeLow |
722 (((off_t)fdata.nFileSizeHigh)<<32);
723 buf->st_dev = buf->st_rdev = 0; /* not used by Git */
724 buf->st_atime = filetime_to_time_t(&(fdata.ftLastAccessTime));
725 buf->st_mtime = filetime_to_time_t(&(fdata.ftLastWriteTime));
726 buf->st_ctime = filetime_to_time_t(&(fdata.ftCreationTime));
727 return 0;
728 }
729 errno = EBADF;
730 return -1;
731 }
732
733 static inline void time_t_to_filetime(time_t t, FILETIME *ft)
734 {
735 long long winTime = t * 10000000LL + 116444736000000000LL;
736 ft->dwLowDateTime = winTime;
737 ft->dwHighDateTime = winTime >> 32;
738 }
739
740 int mingw_utime (const char *file_name, const struct utimbuf *times)
741 {
742 FILETIME mft, aft;
743 int fh, rc;
744 DWORD attrs;
745 wchar_t wfilename[MAX_PATH];
746 if (xutftowcs_path(wfilename, file_name) < 0)
747 return -1;
748
749 /* must have write permission */
750 attrs = GetFileAttributesW(wfilename);
751 if (attrs != INVALID_FILE_ATTRIBUTES &&
752 (attrs & FILE_ATTRIBUTE_READONLY)) {
753 /* ignore errors here; open() will report them */
754 SetFileAttributesW(wfilename, attrs & ~FILE_ATTRIBUTE_READONLY);
755 }
756
757 if ((fh = _wopen(wfilename, O_RDWR | O_BINARY)) < 0) {
758 rc = -1;
759 goto revert_attrs;
760 }
761
762 if (times) {
763 time_t_to_filetime(times->modtime, &mft);
764 time_t_to_filetime(times->actime, &aft);
765 } else {
766 GetSystemTimeAsFileTime(&mft);
767 aft = mft;
768 }
769 if (!SetFileTime((HANDLE)_get_osfhandle(fh), NULL, &aft, &mft)) {
770 errno = EINVAL;
771 rc = -1;
772 } else
773 rc = 0;
774 close(fh);
775
776 revert_attrs:
777 if (attrs != INVALID_FILE_ATTRIBUTES &&
778 (attrs & FILE_ATTRIBUTE_READONLY)) {
779 /* ignore errors again */
780 SetFileAttributesW(wfilename, attrs);
781 }
782 return rc;
783 }
784
785 #undef strftime
786 size_t mingw_strftime(char *s, size_t max,
787 const char *format, const struct tm *tm)
788 {
789 size_t ret = strftime(s, max, format, tm);
790
791 if (!ret && errno == EINVAL)
792 die("invalid strftime format: '%s'", format);
793 return ret;
794 }
795
796 unsigned int sleep (unsigned int seconds)
797 {
798 Sleep(seconds*1000);
799 return 0;
800 }
801
802 char *mingw_mktemp(char *template)
803 {
804 wchar_t wtemplate[MAX_PATH];
805 if (xutftowcs_path(wtemplate, template) < 0)
806 return NULL;
807 if (!_wmktemp(wtemplate))
808 return NULL;
809 if (xwcstoutf(template, wtemplate, strlen(template) + 1) < 0)
810 return NULL;
811 return template;
812 }
813
814 int mkstemp(char *template)
815 {
816 char *filename = mktemp(template);
817 if (filename == NULL)
818 return -1;
819 return open(filename, O_RDWR | O_CREAT, 0600);
820 }
821
822 int gettimeofday(struct timeval *tv, void *tz)
823 {
824 FILETIME ft;
825 long long hnsec;
826
827 GetSystemTimeAsFileTime(&ft);
828 hnsec = filetime_to_hnsec(&ft);
829 tv->tv_sec = hnsec / 10000000;
830 tv->tv_usec = (hnsec % 10000000) / 10;
831 return 0;
832 }
833
834 int pipe(int filedes[2])
835 {
836 HANDLE h[2];
837
838 /* this creates non-inheritable handles */
839 if (!CreatePipe(&h[0], &h[1], NULL, 8192)) {
840 errno = err_win_to_posix(GetLastError());
841 return -1;
842 }
843 filedes[0] = _open_osfhandle(HCAST(int, h[0]), O_NOINHERIT);
844 if (filedes[0] < 0) {
845 CloseHandle(h[0]);
846 CloseHandle(h[1]);
847 return -1;
848 }
849 filedes[1] = _open_osfhandle(HCAST(int, h[1]), O_NOINHERIT);
850 if (filedes[1] < 0) {
851 close(filedes[0]);
852 CloseHandle(h[1]);
853 return -1;
854 }
855 return 0;
856 }
857
858 struct tm *gmtime_r(const time_t *timep, struct tm *result)
859 {
860 /* gmtime() in MSVCRT.DLL is thread-safe, but not reentrant */
861 memcpy(result, gmtime(timep), sizeof(struct tm));
862 return result;
863 }
864
865 struct tm *localtime_r(const time_t *timep, struct tm *result)
866 {
867 /* localtime() in MSVCRT.DLL is thread-safe, but not reentrant */
868 memcpy(result, localtime(timep), sizeof(struct tm));
869 return result;
870 }
871
872 char *mingw_getcwd(char *pointer, int len)
873 {
874 wchar_t wpointer[MAX_PATH];
875 if (!_wgetcwd(wpointer, ARRAY_SIZE(wpointer)))
876 return NULL;
877 if (xwcstoutf(pointer, wpointer, len) < 0)
878 return NULL;
879 convert_slashes(pointer);
880 return pointer;
881 }
882
883 /*
884 * See http://msdn2.microsoft.com/en-us/library/17w5ykft(vs.71).aspx
885 * (Parsing C++ Command-Line Arguments)
886 */
887 static const char *quote_arg(const char *arg)
888 {
889 /* count chars to quote */
890 int len = 0, n = 0;
891 int force_quotes = 0;
892 char *q, *d;
893 const char *p = arg;
894 if (!*p) force_quotes = 1;
895 while (*p) {
896 if (isspace(*p) || *p == '*' || *p == '?' || *p == '{' || *p == '\'')
897 force_quotes = 1;
898 else if (*p == '"')
899 n++;
900 else if (*p == '\\') {
901 int count = 0;
902 while (*p == '\\') {
903 count++;
904 p++;
905 len++;
906 }
907 if (*p == '"' || !*p)
908 n += count*2 + 1;
909 continue;
910 }
911 len++;
912 p++;
913 }
914 if (!force_quotes && n == 0)
915 return arg;
916
917 /* insert \ where necessary */
918 d = q = xmalloc(st_add3(len, n, 3));
919 *d++ = '"';
920 while (*arg) {
921 if (*arg == '"')
922 *d++ = '\\';
923 else if (*arg == '\\') {
924 int count = 0;
925 while (*arg == '\\') {
926 count++;
927 *d++ = *arg++;
928 }
929 if (*arg == '"' || !*arg) {
930 while (count-- > 0)
931 *d++ = '\\';
932 /* don't escape the surrounding end quote */
933 if (!*arg)
934 break;
935 *d++ = '\\';
936 }
937 }
938 *d++ = *arg++;
939 }
940 *d++ = '"';
941 *d++ = '\0';
942 return q;
943 }
944
945 static const char *parse_interpreter(const char *cmd)
946 {
947 static char buf[100];
948 char *p, *opt;
949 int n, fd;
950
951 /* don't even try a .exe */
952 n = strlen(cmd);
953 if (n >= 4 && !strcasecmp(cmd+n-4, ".exe"))
954 return NULL;
955
956 fd = open(cmd, O_RDONLY);
957 if (fd < 0)
958 return NULL;
959 n = read(fd, buf, sizeof(buf)-1);
960 close(fd);
961 if (n < 4) /* at least '#!/x' and not error */
962 return NULL;
963
964 if (buf[0] != '#' || buf[1] != '!')
965 return NULL;
966 buf[n] = '\0';
967 p = buf + strcspn(buf, "\r\n");
968 if (!*p)
969 return NULL;
970
971 *p = '\0';
972 if (!(p = strrchr(buf+2, '/')) && !(p = strrchr(buf+2, '\\')))
973 return NULL;
974 /* strip options */
975 if ((opt = strchr(p+1, ' ')))
976 *opt = '\0';
977 return p+1;
978 }
979
980 /*
981 * exe_only means that we only want to detect .exe files, but not scripts
982 * (which do not have an extension)
983 */
984 static char *lookup_prog(const char *dir, int dirlen, const char *cmd,
985 int isexe, int exe_only)
986 {
987 char path[MAX_PATH];
988 snprintf(path, sizeof(path), "%.*s\\%s.exe", dirlen, dir, cmd);
989
990 if (!isexe && access(path, F_OK) == 0)
991 return xstrdup(path);
992 path[strlen(path)-4] = '\0';
993 if ((!exe_only || isexe) && access(path, F_OK) == 0)
994 if (!(GetFileAttributes(path) & FILE_ATTRIBUTE_DIRECTORY))
995 return xstrdup(path);
996 return NULL;
997 }
998
999 /*
1000 * Determines the absolute path of cmd using the split path in path.
1001 * If cmd contains a slash or backslash, no lookup is performed.
1002 */
1003 static char *path_lookup(const char *cmd, int exe_only)
1004 {
1005 const char *path;
1006 char *prog = NULL;
1007 int len = strlen(cmd);
1008 int isexe = len >= 4 && !strcasecmp(cmd+len-4, ".exe");
1009
1010 if (strchr(cmd, '/') || strchr(cmd, '\\'))
1011 return xstrdup(cmd);
1012
1013 path = mingw_getenv("PATH");
1014 if (!path)
1015 return NULL;
1016
1017 while (!prog) {
1018 const char *sep = strchrnul(path, ';');
1019 int dirlen = sep - path;
1020 if (dirlen)
1021 prog = lookup_prog(path, dirlen, cmd, isexe, exe_only);
1022 if (!*sep)
1023 break;
1024 path = sep + 1;
1025 }
1026
1027 return prog;
1028 }
1029
1030 static int do_putenv(char **env, const char *name, int size, int free_old);
1031
1032 /* used number of elements of environ array, including terminating NULL */
1033 static int environ_size = 0;
1034 /* allocated size of environ array, in bytes */
1035 static int environ_alloc = 0;
1036
1037 /*
1038 * Create environment block suitable for CreateProcess. Merges current
1039 * process environment and the supplied environment changes.
1040 */
1041 static wchar_t *make_environment_block(char **deltaenv)
1042 {
1043 wchar_t *wenvblk = NULL;
1044 char **tmpenv;
1045 int i = 0, size = environ_size, wenvsz = 0, wenvpos = 0;
1046
1047 while (deltaenv && deltaenv[i])
1048 i++;
1049
1050 /* copy the environment, leaving space for changes */
1051 ALLOC_ARRAY(tmpenv, size + i);
1052 memcpy(tmpenv, environ, size * sizeof(char*));
1053
1054 /* merge supplied environment changes into the temporary environment */
1055 for (i = 0; deltaenv && deltaenv[i]; i++)
1056 size = do_putenv(tmpenv, deltaenv[i], size, 0);
1057
1058 /* create environment block from temporary environment */
1059 for (i = 0; tmpenv[i]; i++) {
1060 size = 2 * strlen(tmpenv[i]) + 2; /* +2 for final \0 */
1061 ALLOC_GROW(wenvblk, (wenvpos + size) * sizeof(wchar_t), wenvsz);
1062 wenvpos += xutftowcs(&wenvblk[wenvpos], tmpenv[i], size) + 1;
1063 }
1064 /* add final \0 terminator */
1065 wenvblk[wenvpos] = 0;
1066 free(tmpenv);
1067 return wenvblk;
1068 }
1069
1070 struct pinfo_t {
1071 struct pinfo_t *next;
1072 pid_t pid;
1073 HANDLE proc;
1074 };
1075 static struct pinfo_t *pinfo = NULL;
1076 CRITICAL_SECTION pinfo_cs;
1077
1078 static pid_t mingw_spawnve_fd(const char *cmd, const char **argv, char **deltaenv,
1079 const char *dir,
1080 int prepend_cmd, int fhin, int fhout, int fherr)
1081 {
1082 STARTUPINFOW si;
1083 PROCESS_INFORMATION pi;
1084 struct strbuf args;
1085 wchar_t wcmd[MAX_PATH], wdir[MAX_PATH], *wargs, *wenvblk = NULL;
1086 unsigned flags = CREATE_UNICODE_ENVIRONMENT;
1087 BOOL ret;
1088
1089 /* Determine whether or not we are associated to a console */
1090 HANDLE cons = CreateFile("CONOUT$", GENERIC_WRITE,
1091 FILE_SHARE_WRITE, NULL, OPEN_EXISTING,
1092 FILE_ATTRIBUTE_NORMAL, NULL);
1093 if (cons == INVALID_HANDLE_VALUE) {
1094 /* There is no console associated with this process.
1095 * Since the child is a console process, Windows
1096 * would normally create a console window. But
1097 * since we'll be redirecting std streams, we do
1098 * not need the console.
1099 * It is necessary to use DETACHED_PROCESS
1100 * instead of CREATE_NO_WINDOW to make ssh
1101 * recognize that it has no console.
1102 */
1103 flags |= DETACHED_PROCESS;
1104 } else {
1105 /* There is already a console. If we specified
1106 * DETACHED_PROCESS here, too, Windows would
1107 * disassociate the child from the console.
1108 * The same is true for CREATE_NO_WINDOW.
1109 * Go figure!
1110 */
1111 CloseHandle(cons);
1112 }
1113 memset(&si, 0, sizeof(si));
1114 si.cb = sizeof(si);
1115 si.dwFlags = STARTF_USESTDHANDLES;
1116 si.hStdInput = winansi_get_osfhandle(fhin);
1117 si.hStdOutput = winansi_get_osfhandle(fhout);
1118 si.hStdError = winansi_get_osfhandle(fherr);
1119
1120 if (xutftowcs_path(wcmd, cmd) < 0)
1121 return -1;
1122 if (dir && xutftowcs_path(wdir, dir) < 0)
1123 return -1;
1124
1125 /* concatenate argv, quoting args as we go */
1126 strbuf_init(&args, 0);
1127 if (prepend_cmd) {
1128 char *quoted = (char *)quote_arg(cmd);
1129 strbuf_addstr(&args, quoted);
1130 if (quoted != cmd)
1131 free(quoted);
1132 }
1133 for (; *argv; argv++) {
1134 char *quoted = (char *)quote_arg(*argv);
1135 if (*args.buf)
1136 strbuf_addch(&args, ' ');
1137 strbuf_addstr(&args, quoted);
1138 if (quoted != *argv)
1139 free(quoted);
1140 }
1141
1142 ALLOC_ARRAY(wargs, st_add(st_mult(2, args.len), 1));
1143 xutftowcs(wargs, args.buf, 2 * args.len + 1);
1144 strbuf_release(&args);
1145
1146 wenvblk = make_environment_block(deltaenv);
1147
1148 memset(&pi, 0, sizeof(pi));
1149 ret = CreateProcessW(wcmd, wargs, NULL, NULL, TRUE, flags,
1150 wenvblk, dir ? wdir : NULL, &si, &pi);
1151
1152 free(wenvblk);
1153 free(wargs);
1154
1155 if (!ret) {
1156 errno = ENOENT;
1157 return -1;
1158 }
1159 CloseHandle(pi.hThread);
1160
1161 /*
1162 * The process ID is the human-readable identifier of the process
1163 * that we want to present in log and error messages. The handle
1164 * is not useful for this purpose. But we cannot close it, either,
1165 * because it is not possible to turn a process ID into a process
1166 * handle after the process terminated.
1167 * Keep the handle in a list for waitpid.
1168 */
1169 EnterCriticalSection(&pinfo_cs);
1170 {
1171 struct pinfo_t *info = xmalloc(sizeof(struct pinfo_t));
1172 info->pid = pi.dwProcessId;
1173 info->proc = pi.hProcess;
1174 info->next = pinfo;
1175 pinfo = info;
1176 }
1177 LeaveCriticalSection(&pinfo_cs);
1178
1179 return (pid_t)pi.dwProcessId;
1180 }
1181
1182 static pid_t mingw_spawnv(const char *cmd, const char **argv, int prepend_cmd)
1183 {
1184 return mingw_spawnve_fd(cmd, argv, NULL, NULL, prepend_cmd, 0, 1, 2);
1185 }
1186
1187 pid_t mingw_spawnvpe(const char *cmd, const char **argv, char **deltaenv,
1188 const char *dir,
1189 int fhin, int fhout, int fherr)
1190 {
1191 pid_t pid;
1192 char *prog = path_lookup(cmd, 0);
1193
1194 if (!prog) {
1195 errno = ENOENT;
1196 pid = -1;
1197 }
1198 else {
1199 const char *interpr = parse_interpreter(prog);
1200
1201 if (interpr) {
1202 const char *argv0 = argv[0];
1203 char *iprog = path_lookup(interpr, 1);
1204 argv[0] = prog;
1205 if (!iprog) {
1206 errno = ENOENT;
1207 pid = -1;
1208 }
1209 else {
1210 pid = mingw_spawnve_fd(iprog, argv, deltaenv, dir, 1,
1211 fhin, fhout, fherr);
1212 free(iprog);
1213 }
1214 argv[0] = argv0;
1215 }
1216 else
1217 pid = mingw_spawnve_fd(prog, argv, deltaenv, dir, 0,
1218 fhin, fhout, fherr);
1219 free(prog);
1220 }
1221 return pid;
1222 }
1223
1224 static int try_shell_exec(const char *cmd, char *const *argv)
1225 {
1226 const char *interpr = parse_interpreter(cmd);
1227 char *prog;
1228 int pid = 0;
1229
1230 if (!interpr)
1231 return 0;
1232 prog = path_lookup(interpr, 1);
1233 if (prog) {
1234 int argc = 0;
1235 const char **argv2;
1236 while (argv[argc]) argc++;
1237 ALLOC_ARRAY(argv2, argc + 1);
1238 argv2[0] = (char *)cmd; /* full path to the script file */
1239 memcpy(&argv2[1], &argv[1], sizeof(*argv) * argc);
1240 pid = mingw_spawnv(prog, argv2, 1);
1241 if (pid >= 0) {
1242 int status;
1243 if (waitpid(pid, &status, 0) < 0)
1244 status = 255;
1245 exit(status);
1246 }
1247 pid = 1; /* indicate that we tried but failed */
1248 free(prog);
1249 free(argv2);
1250 }
1251 return pid;
1252 }
1253
1254 int mingw_execv(const char *cmd, char *const *argv)
1255 {
1256 /* check if git_command is a shell script */
1257 if (!try_shell_exec(cmd, argv)) {
1258 int pid, status;
1259
1260 pid = mingw_spawnv(cmd, (const char **)argv, 0);
1261 if (pid < 0)
1262 return -1;
1263 if (waitpid(pid, &status, 0) < 0)
1264 status = 255;
1265 exit(status);
1266 }
1267 return -1;
1268 }
1269
1270 int mingw_execvp(const char *cmd, char *const *argv)
1271 {
1272 char *prog = path_lookup(cmd, 0);
1273
1274 if (prog) {
1275 mingw_execv(prog, argv);
1276 free(prog);
1277 } else
1278 errno = ENOENT;
1279
1280 return -1;
1281 }
1282
1283 int mingw_kill(pid_t pid, int sig)
1284 {
1285 if (pid > 0 && sig == SIGTERM) {
1286 HANDLE h = OpenProcess(PROCESS_TERMINATE, FALSE, pid);
1287
1288 if (TerminateProcess(h, -1)) {
1289 CloseHandle(h);
1290 return 0;
1291 }
1292
1293 errno = err_win_to_posix(GetLastError());
1294 CloseHandle(h);
1295 return -1;
1296 } else if (pid > 0 && sig == 0) {
1297 HANDLE h = OpenProcess(PROCESS_QUERY_INFORMATION, FALSE, pid);
1298 if (h) {
1299 CloseHandle(h);
1300 return 0;
1301 }
1302 }
1303
1304 errno = EINVAL;
1305 return -1;
1306 }
1307
1308 /*
1309 * Compare environment entries by key (i.e. stopping at '=' or '\0').
1310 */
1311 static int compareenv(const void *v1, const void *v2)
1312 {
1313 const char *e1 = *(const char**)v1;
1314 const char *e2 = *(const char**)v2;
1315
1316 for (;;) {
1317 int c1 = *e1++;
1318 int c2 = *e2++;
1319 c1 = (c1 == '=') ? 0 : tolower(c1);
1320 c2 = (c2 == '=') ? 0 : tolower(c2);
1321 if (c1 > c2)
1322 return 1;
1323 if (c1 < c2)
1324 return -1;
1325 if (c1 == 0)
1326 return 0;
1327 }
1328 }
1329
1330 static int bsearchenv(char **env, const char *name, size_t size)
1331 {
1332 unsigned low = 0, high = size;
1333 while (low < high) {
1334 unsigned mid = low + ((high - low) >> 1);
1335 int cmp = compareenv(&env[mid], &name);
1336 if (cmp < 0)
1337 low = mid + 1;
1338 else if (cmp > 0)
1339 high = mid;
1340 else
1341 return mid;
1342 }
1343 return ~low; /* not found, return 1's complement of insert position */
1344 }
1345
1346 /*
1347 * If name contains '=', then sets the variable, otherwise it unsets it
1348 * Size includes the terminating NULL. Env must have room for size + 1 entries
1349 * (in case of insert). Returns the new size. Optionally frees removed entries.
1350 */
1351 static int do_putenv(char **env, const char *name, int size, int free_old)
1352 {
1353 int i = bsearchenv(env, name, size - 1);
1354
1355 /* optionally free removed / replaced entry */
1356 if (i >= 0 && free_old)
1357 free(env[i]);
1358
1359 if (strchr(name, '=')) {
1360 /* if new value ('key=value') is specified, insert or replace entry */
1361 if (i < 0) {
1362 i = ~i;
1363 memmove(&env[i + 1], &env[i], (size - i) * sizeof(char*));
1364 size++;
1365 }
1366 env[i] = (char*) name;
1367 } else if (i >= 0) {
1368 /* otherwise ('key') remove existing entry */
1369 size--;
1370 memmove(&env[i], &env[i + 1], (size - i) * sizeof(char*));
1371 }
1372 return size;
1373 }
1374
1375 char *mingw_getenv(const char *name)
1376 {
1377 char *value;
1378 int pos = bsearchenv(environ, name, environ_size - 1);
1379 if (pos < 0)
1380 return NULL;
1381 value = strchr(environ[pos], '=');
1382 return value ? &value[1] : NULL;
1383 }
1384
1385 int mingw_putenv(const char *namevalue)
1386 {
1387 ALLOC_GROW(environ, (environ_size + 1) * sizeof(char*), environ_alloc);
1388 environ_size = do_putenv(environ, namevalue, environ_size, 1);
1389 return 0;
1390 }
1391
1392 /*
1393 * Note, this isn't a complete replacement for getaddrinfo. It assumes
1394 * that service contains a numerical port, or that it is null. It
1395 * does a simple search using gethostbyname, and returns one IPv4 host
1396 * if one was found.
1397 */
1398 static int WSAAPI getaddrinfo_stub(const char *node, const char *service,
1399 const struct addrinfo *hints,
1400 struct addrinfo **res)
1401 {
1402 struct hostent *h = NULL;
1403 struct addrinfo *ai;
1404 struct sockaddr_in *sin;
1405
1406 if (node) {
1407 h = gethostbyname(node);
1408 if (!h)
1409 return WSAGetLastError();
1410 }
1411
1412 ai = xmalloc(sizeof(struct addrinfo));
1413 *res = ai;
1414 ai->ai_flags = 0;
1415 ai->ai_family = AF_INET;
1416 ai->ai_socktype = hints ? hints->ai_socktype : 0;
1417 switch (ai->ai_socktype) {
1418 case SOCK_STREAM:
1419 ai->ai_protocol = IPPROTO_TCP;
1420 break;
1421 case SOCK_DGRAM:
1422 ai->ai_protocol = IPPROTO_UDP;
1423 break;
1424 default:
1425 ai->ai_protocol = 0;
1426 break;
1427 }
1428 ai->ai_addrlen = sizeof(struct sockaddr_in);
1429 if (hints && (hints->ai_flags & AI_CANONNAME))
1430 ai->ai_canonname = h ? xstrdup(h->h_name) : NULL;
1431 else
1432 ai->ai_canonname = NULL;
1433
1434 sin = xcalloc(1, ai->ai_addrlen);
1435 sin->sin_family = AF_INET;
1436 /* Note: getaddrinfo is supposed to allow service to be a string,
1437 * which should be looked up using getservbyname. This is
1438 * currently not implemented */
1439 if (service)
1440 sin->sin_port = htons(atoi(service));
1441 if (h)
1442 sin->sin_addr = *(struct in_addr *)h->h_addr;
1443 else if (hints && (hints->ai_flags & AI_PASSIVE))
1444 sin->sin_addr.s_addr = INADDR_ANY;
1445 else
1446 sin->sin_addr.s_addr = INADDR_LOOPBACK;
1447 ai->ai_addr = (struct sockaddr *)sin;
1448 ai->ai_next = NULL;
1449 return 0;
1450 }
1451
1452 static void WSAAPI freeaddrinfo_stub(struct addrinfo *res)
1453 {
1454 free(res->ai_canonname);
1455 free(res->ai_addr);
1456 free(res);
1457 }
1458
1459 static int WSAAPI getnameinfo_stub(const struct sockaddr *sa, socklen_t salen,
1460 char *host, DWORD hostlen,
1461 char *serv, DWORD servlen, int flags)
1462 {
1463 const struct sockaddr_in *sin = (const struct sockaddr_in *)sa;
1464 if (sa->sa_family != AF_INET)
1465 return EAI_FAMILY;
1466 if (!host && !serv)
1467 return EAI_NONAME;
1468
1469 if (host && hostlen > 0) {
1470 struct hostent *ent = NULL;
1471 if (!(flags & NI_NUMERICHOST))
1472 ent = gethostbyaddr((const char *)&sin->sin_addr,
1473 sizeof(sin->sin_addr), AF_INET);
1474
1475 if (ent)
1476 snprintf(host, hostlen, "%s", ent->h_name);
1477 else if (flags & NI_NAMEREQD)
1478 return EAI_NONAME;
1479 else
1480 snprintf(host, hostlen, "%s", inet_ntoa(sin->sin_addr));
1481 }
1482
1483 if (serv && servlen > 0) {
1484 struct servent *ent = NULL;
1485 if (!(flags & NI_NUMERICSERV))
1486 ent = getservbyport(sin->sin_port,
1487 flags & NI_DGRAM ? "udp" : "tcp");
1488
1489 if (ent)
1490 snprintf(serv, servlen, "%s", ent->s_name);
1491 else
1492 snprintf(serv, servlen, "%d", ntohs(sin->sin_port));
1493 }
1494
1495 return 0;
1496 }
1497
1498 static HMODULE ipv6_dll = NULL;
1499 static void (WSAAPI *ipv6_freeaddrinfo)(struct addrinfo *res);
1500 static int (WSAAPI *ipv6_getaddrinfo)(const char *node, const char *service,
1501 const struct addrinfo *hints,
1502 struct addrinfo **res);
1503 static int (WSAAPI *ipv6_getnameinfo)(const struct sockaddr *sa, socklen_t salen,
1504 char *host, DWORD hostlen,
1505 char *serv, DWORD servlen, int flags);
1506 /*
1507 * gai_strerror is an inline function in the ws2tcpip.h header, so we
1508 * don't need to try to load that one dynamically.
1509 */
1510
1511 static void socket_cleanup(void)
1512 {
1513 WSACleanup();
1514 if (ipv6_dll)
1515 FreeLibrary(ipv6_dll);
1516 ipv6_dll = NULL;
1517 ipv6_freeaddrinfo = freeaddrinfo_stub;
1518 ipv6_getaddrinfo = getaddrinfo_stub;
1519 ipv6_getnameinfo = getnameinfo_stub;
1520 }
1521
1522 static void ensure_socket_initialization(void)
1523 {
1524 WSADATA wsa;
1525 static int initialized = 0;
1526 const char *libraries[] = { "ws2_32.dll", "wship6.dll", NULL };
1527 const char **name;
1528
1529 if (initialized)
1530 return;
1531
1532 if (WSAStartup(MAKEWORD(2,2), &wsa))
1533 die("unable to initialize winsock subsystem, error %d",
1534 WSAGetLastError());
1535
1536 for (name = libraries; *name; name++) {
1537 ipv6_dll = LoadLibrary(*name);
1538 if (!ipv6_dll)
1539 continue;
1540
1541 ipv6_freeaddrinfo = (void (WSAAPI *)(struct addrinfo *))
1542 GetProcAddress(ipv6_dll, "freeaddrinfo");
1543 ipv6_getaddrinfo = (int (WSAAPI *)(const char *, const char *,
1544 const struct addrinfo *,
1545 struct addrinfo **))
1546 GetProcAddress(ipv6_dll, "getaddrinfo");
1547 ipv6_getnameinfo = (int (WSAAPI *)(const struct sockaddr *,
1548 socklen_t, char *, DWORD,
1549 char *, DWORD, int))
1550 GetProcAddress(ipv6_dll, "getnameinfo");
1551 if (!ipv6_freeaddrinfo || !ipv6_getaddrinfo || !ipv6_getnameinfo) {
1552 FreeLibrary(ipv6_dll);
1553 ipv6_dll = NULL;
1554 } else
1555 break;
1556 }
1557 if (!ipv6_freeaddrinfo || !ipv6_getaddrinfo || !ipv6_getnameinfo) {
1558 ipv6_freeaddrinfo = freeaddrinfo_stub;
1559 ipv6_getaddrinfo = getaddrinfo_stub;
1560 ipv6_getnameinfo = getnameinfo_stub;
1561 }
1562
1563 atexit(socket_cleanup);
1564 initialized = 1;
1565 }
1566
1567 #undef gethostname
1568 int mingw_gethostname(char *name, int namelen)
1569 {
1570 ensure_socket_initialization();
1571 return gethostname(name, namelen);
1572 }
1573
1574 #undef gethostbyname
1575 struct hostent *mingw_gethostbyname(const char *host)
1576 {
1577 ensure_socket_initialization();
1578 return gethostbyname(host);
1579 }
1580
1581 void mingw_freeaddrinfo(struct addrinfo *res)
1582 {
1583 ipv6_freeaddrinfo(res);
1584 }
1585
1586 int mingw_getaddrinfo(const char *node, const char *service,
1587 const struct addrinfo *hints, struct addrinfo **res)
1588 {
1589 ensure_socket_initialization();
1590 return ipv6_getaddrinfo(node, service, hints, res);
1591 }
1592
1593 int mingw_getnameinfo(const struct sockaddr *sa, socklen_t salen,
1594 char *host, DWORD hostlen, char *serv, DWORD servlen,
1595 int flags)
1596 {
1597 ensure_socket_initialization();
1598 return ipv6_getnameinfo(sa, salen, host, hostlen, serv, servlen, flags);
1599 }
1600
1601 int mingw_socket(int domain, int type, int protocol)
1602 {
1603 int sockfd;
1604 SOCKET s;
1605
1606 ensure_socket_initialization();
1607 s = WSASocket(domain, type, protocol, NULL, 0, 0);
1608 if (s == INVALID_SOCKET) {
1609 /*
1610 * WSAGetLastError() values are regular BSD error codes
1611 * biased by WSABASEERR.
1612 * However, strerror() does not know about networking
1613 * specific errors, which are values beginning at 38 or so.
1614 * Therefore, we choose to leave the biased error code
1615 * in errno so that _if_ someone looks up the code somewhere,
1616 * then it is at least the number that are usually listed.
1617 */
1618 errno = WSAGetLastError();
1619 return -1;
1620 }
1621 /* convert into a file descriptor */
1622 if ((sockfd = _open_osfhandle(s, O_RDWR|O_BINARY)) < 0) {
1623 closesocket(s);
1624 return error("unable to make a socket file descriptor: %s",
1625 strerror(errno));
1626 }
1627 return sockfd;
1628 }
1629
1630 #undef connect
1631 int mingw_connect(int sockfd, struct sockaddr *sa, size_t sz)
1632 {
1633 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
1634 return connect(s, sa, sz);
1635 }
1636
1637 #undef bind
1638 int mingw_bind(int sockfd, struct sockaddr *sa, size_t sz)
1639 {
1640 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
1641 return bind(s, sa, sz);
1642 }
1643
1644 #undef setsockopt
1645 int mingw_setsockopt(int sockfd, int lvl, int optname, void *optval, int optlen)
1646 {
1647 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
1648 return setsockopt(s, lvl, optname, (const char*)optval, optlen);
1649 }
1650
1651 #undef shutdown
1652 int mingw_shutdown(int sockfd, int how)
1653 {
1654 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
1655 return shutdown(s, how);
1656 }
1657
1658 #undef listen
1659 int mingw_listen(int sockfd, int backlog)
1660 {
1661 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
1662 return listen(s, backlog);
1663 }
1664
1665 #undef accept
1666 int mingw_accept(int sockfd1, struct sockaddr *sa, socklen_t *sz)
1667 {
1668 int sockfd2;
1669
1670 SOCKET s1 = (SOCKET)_get_osfhandle(sockfd1);
1671 SOCKET s2 = accept(s1, sa, sz);
1672
1673 /* convert into a file descriptor */
1674 if ((sockfd2 = _open_osfhandle(s2, O_RDWR|O_BINARY)) < 0) {
1675 int err = errno;
1676 closesocket(s2);
1677 return error("unable to make a socket file descriptor: %s",
1678 strerror(err));
1679 }
1680 return sockfd2;
1681 }
1682
1683 #undef rename
1684 int mingw_rename(const char *pold, const char *pnew)
1685 {
1686 DWORD attrs, gle;
1687 int tries = 0;
1688 wchar_t wpold[MAX_PATH], wpnew[MAX_PATH];
1689 if (xutftowcs_path(wpold, pold) < 0 || xutftowcs_path(wpnew, pnew) < 0)
1690 return -1;
1691
1692 /*
1693 * Try native rename() first to get errno right.
1694 * It is based on MoveFile(), which cannot overwrite existing files.
1695 */
1696 if (!_wrename(wpold, wpnew))
1697 return 0;
1698 if (errno != EEXIST)
1699 return -1;
1700 repeat:
1701 if (MoveFileExW(wpold, wpnew, MOVEFILE_REPLACE_EXISTING))
1702 return 0;
1703 /* TODO: translate more errors */
1704 gle = GetLastError();
1705 if (gle == ERROR_ACCESS_DENIED &&
1706 (attrs = GetFileAttributesW(wpnew)) != INVALID_FILE_ATTRIBUTES) {
1707 if (attrs & FILE_ATTRIBUTE_DIRECTORY) {
1708 DWORD attrsold = GetFileAttributesW(wpold);
1709 if (attrsold == INVALID_FILE_ATTRIBUTES ||
1710 !(attrsold & FILE_ATTRIBUTE_DIRECTORY))
1711 errno = EISDIR;
1712 else if (!_wrmdir(wpnew))
1713 goto repeat;
1714 return -1;
1715 }
1716 if ((attrs & FILE_ATTRIBUTE_READONLY) &&
1717 SetFileAttributesW(wpnew, attrs & ~FILE_ATTRIBUTE_READONLY)) {
1718 if (MoveFileExW(wpold, wpnew, MOVEFILE_REPLACE_EXISTING))
1719 return 0;
1720 gle = GetLastError();
1721 /* revert file attributes on failure */
1722 SetFileAttributesW(wpnew, attrs);
1723 }
1724 }
1725 if (tries < ARRAY_SIZE(delay) && gle == ERROR_ACCESS_DENIED) {
1726 /*
1727 * We assume that some other process had the source or
1728 * destination file open at the wrong moment and retry.
1729 * In order to give the other process a higher chance to
1730 * complete its operation, we give up our time slice now.
1731 * If we have to retry again, we do sleep a bit.
1732 */
1733 Sleep(delay[tries]);
1734 tries++;
1735 goto repeat;
1736 }
1737 if (gle == ERROR_ACCESS_DENIED &&
1738 ask_yes_no_if_possible("Rename from '%s' to '%s' failed. "
1739 "Should I try again?", pold, pnew))
1740 goto repeat;
1741
1742 errno = EACCES;
1743 return -1;
1744 }
1745
1746 /*
1747 * Note that this doesn't return the actual pagesize, but
1748 * the allocation granularity. If future Windows specific git code
1749 * needs the real getpagesize function, we need to find another solution.
1750 */
1751 int mingw_getpagesize(void)
1752 {
1753 SYSTEM_INFO si;
1754 GetSystemInfo(&si);
1755 return si.dwAllocationGranularity;
1756 }
1757
1758 struct passwd *getpwuid(int uid)
1759 {
1760 static char user_name[100];
1761 static struct passwd p;
1762
1763 DWORD len = sizeof(user_name);
1764 if (!GetUserName(user_name, &len))
1765 return NULL;
1766 p.pw_name = user_name;
1767 p.pw_gecos = "unknown";
1768 p.pw_dir = NULL;
1769 return &p;
1770 }
1771
1772 static HANDLE timer_event;
1773 static HANDLE timer_thread;
1774 static int timer_interval;
1775 static int one_shot;
1776 static sig_handler_t timer_fn = SIG_DFL, sigint_fn = SIG_DFL;
1777
1778 /* The timer works like this:
1779 * The thread, ticktack(), is a trivial routine that most of the time
1780 * only waits to receive the signal to terminate. The main thread tells
1781 * the thread to terminate by setting the timer_event to the signalled
1782 * state.
1783 * But ticktack() interrupts the wait state after the timer's interval
1784 * length to call the signal handler.
1785 */
1786
1787 static unsigned __stdcall ticktack(void *dummy)
1788 {
1789 while (WaitForSingleObject(timer_event, timer_interval) == WAIT_TIMEOUT) {
1790 mingw_raise(SIGALRM);
1791 if (one_shot)
1792 break;
1793 }
1794 return 0;
1795 }
1796
1797 static int start_timer_thread(void)
1798 {
1799 timer_event = CreateEvent(NULL, FALSE, FALSE, NULL);
1800 if (timer_event) {
1801 timer_thread = (HANDLE) _beginthreadex(NULL, 0, ticktack, NULL, 0, NULL);
1802 if (!timer_thread )
1803 return errno = ENOMEM,
1804 error("cannot start timer thread");
1805 } else
1806 return errno = ENOMEM,
1807 error("cannot allocate resources for timer");
1808 return 0;
1809 }
1810
1811 static void stop_timer_thread(void)
1812 {
1813 if (timer_event)
1814 SetEvent(timer_event); /* tell thread to terminate */
1815 if (timer_thread) {
1816 int rc = WaitForSingleObject(timer_thread, 1000);
1817 if (rc == WAIT_TIMEOUT)
1818 error("timer thread did not terminate timely");
1819 else if (rc != WAIT_OBJECT_0)
1820 error("waiting for timer thread failed: %lu",
1821 GetLastError());
1822 CloseHandle(timer_thread);
1823 }
1824 if (timer_event)
1825 CloseHandle(timer_event);
1826 timer_event = NULL;
1827 timer_thread = NULL;
1828 }
1829
1830 static inline int is_timeval_eq(const struct timeval *i1, const struct timeval *i2)
1831 {
1832 return i1->tv_sec == i2->tv_sec && i1->tv_usec == i2->tv_usec;
1833 }
1834
1835 int setitimer(int type, struct itimerval *in, struct itimerval *out)
1836 {
1837 static const struct timeval zero;
1838 static int atexit_done;
1839
1840 if (out != NULL)
1841 return errno = EINVAL,
1842 error("setitimer param 3 != NULL not implemented");
1843 if (!is_timeval_eq(&in->it_interval, &zero) &&
1844 !is_timeval_eq(&in->it_interval, &in->it_value))
1845 return errno = EINVAL,
1846 error("setitimer: it_interval must be zero or eq it_value");
1847
1848 if (timer_thread)
1849 stop_timer_thread();
1850
1851 if (is_timeval_eq(&in->it_value, &zero) &&
1852 is_timeval_eq(&in->it_interval, &zero))
1853 return 0;
1854
1855 timer_interval = in->it_value.tv_sec * 1000 + in->it_value.tv_usec / 1000;
1856 one_shot = is_timeval_eq(&in->it_interval, &zero);
1857 if (!atexit_done) {
1858 atexit(stop_timer_thread);
1859 atexit_done = 1;
1860 }
1861 return start_timer_thread();
1862 }
1863
1864 int sigaction(int sig, struct sigaction *in, struct sigaction *out)
1865 {
1866 if (sig != SIGALRM)
1867 return errno = EINVAL,
1868 error("sigaction only implemented for SIGALRM");
1869 if (out != NULL)
1870 return errno = EINVAL,
1871 error("sigaction: param 3 != NULL not implemented");
1872
1873 timer_fn = in->sa_handler;
1874 return 0;
1875 }
1876
1877 #undef signal
1878 sig_handler_t mingw_signal(int sig, sig_handler_t handler)
1879 {
1880 sig_handler_t old;
1881
1882 switch (sig) {
1883 case SIGALRM:
1884 old = timer_fn;
1885 timer_fn = handler;
1886 break;
1887
1888 case SIGINT:
1889 old = sigint_fn;
1890 sigint_fn = handler;
1891 break;
1892
1893 default:
1894 return signal(sig, handler);
1895 }
1896
1897 return old;
1898 }
1899
1900 #undef raise
1901 int mingw_raise(int sig)
1902 {
1903 switch (sig) {
1904 case SIGALRM:
1905 if (timer_fn == SIG_DFL) {
1906 if (isatty(STDERR_FILENO))
1907 fputs("Alarm clock\n", stderr);
1908 exit(128 + SIGALRM);
1909 } else if (timer_fn != SIG_IGN)
1910 timer_fn(SIGALRM);
1911 return 0;
1912
1913 case SIGINT:
1914 if (sigint_fn == SIG_DFL)
1915 exit(128 + SIGINT);
1916 else if (sigint_fn != SIG_IGN)
1917 sigint_fn(SIGINT);
1918 return 0;
1919
1920 default:
1921 return raise(sig);
1922 }
1923 }
1924
1925 int link(const char *oldpath, const char *newpath)
1926 {
1927 typedef BOOL (WINAPI *T)(LPCWSTR, LPCWSTR, LPSECURITY_ATTRIBUTES);
1928 static T create_hard_link = NULL;
1929 wchar_t woldpath[MAX_PATH], wnewpath[MAX_PATH];
1930 if (xutftowcs_path(woldpath, oldpath) < 0 ||
1931 xutftowcs_path(wnewpath, newpath) < 0)
1932 return -1;
1933
1934 if (!create_hard_link) {
1935 create_hard_link = (T) GetProcAddress(
1936 GetModuleHandle("kernel32.dll"), "CreateHardLinkW");
1937 if (!create_hard_link)
1938 create_hard_link = (T)-1;
1939 }
1940 if (create_hard_link == (T)-1) {
1941 errno = ENOSYS;
1942 return -1;
1943 }
1944 if (!create_hard_link(wnewpath, woldpath, NULL)) {
1945 errno = err_win_to_posix(GetLastError());
1946 return -1;
1947 }
1948 return 0;
1949 }
1950
1951 pid_t waitpid(pid_t pid, int *status, int options)
1952 {
1953 HANDLE h = OpenProcess(SYNCHRONIZE | PROCESS_QUERY_INFORMATION,
1954 FALSE, pid);
1955 if (!h) {
1956 errno = ECHILD;
1957 return -1;
1958 }
1959
1960 if (pid > 0 && options & WNOHANG) {
1961 if (WAIT_OBJECT_0 != WaitForSingleObject(h, 0)) {
1962 CloseHandle(h);
1963 return 0;
1964 }
1965 options &= ~WNOHANG;
1966 }
1967
1968 if (options == 0) {
1969 struct pinfo_t **ppinfo;
1970 if (WaitForSingleObject(h, INFINITE) != WAIT_OBJECT_0) {
1971 CloseHandle(h);
1972 return 0;
1973 }
1974
1975 if (status)
1976 GetExitCodeProcess(h, (LPDWORD)status);
1977
1978 EnterCriticalSection(&pinfo_cs);
1979
1980 ppinfo = &pinfo;
1981 while (*ppinfo) {
1982 struct pinfo_t *info = *ppinfo;
1983 if (info->pid == pid) {
1984 CloseHandle(info->proc);
1985 *ppinfo = info->next;
1986 free(info);
1987 break;
1988 }
1989 ppinfo = &info->next;
1990 }
1991
1992 LeaveCriticalSection(&pinfo_cs);
1993
1994 CloseHandle(h);
1995 return pid;
1996 }
1997 CloseHandle(h);
1998
1999 errno = EINVAL;
2000 return -1;
2001 }
2002
2003 int mingw_has_dos_drive_prefix(const char *path)
2004 {
2005 int i;
2006
2007 /*
2008 * Does it start with an ASCII letter (i.e. highest bit not set),
2009 * followed by a colon?
2010 */
2011 if (!(0x80 & (unsigned char)*path))
2012 return *path && path[1] == ':' ? 2 : 0;
2013
2014 /*
2015 * While drive letters must be letters of the English alphabet, it is
2016 * possible to assign virtually _any_ Unicode character via `subst` as
2017 * a drive letter to "virtual drives". Even `1`, or `ä`. Or fun stuff
2018 * like this:
2019 *
2020 * subst ֍: %USERPROFILE%\Desktop
2021 */
2022 for (i = 1; i < 4 && (0x80 & (unsigned char)path[i]); i++)
2023 ; /* skip first UTF-8 character */
2024 return path[i] == ':' ? i + 1 : 0;
2025 }
2026
2027 int mingw_skip_dos_drive_prefix(char **path)
2028 {
2029 int ret = has_dos_drive_prefix(*path);
2030 *path += ret;
2031 return ret;
2032 }
2033
2034 int mingw_offset_1st_component(const char *path)
2035 {
2036 char *pos = (char *)path;
2037
2038 /* unc paths */
2039 if (!skip_dos_drive_prefix(&pos) &&
2040 is_dir_sep(pos[0]) && is_dir_sep(pos[1])) {
2041 /* skip server name */
2042 pos = strpbrk(pos + 2, "\\/");
2043 if (!pos)
2044 return 0; /* Error: malformed unc path */
2045
2046 do {
2047 pos++;
2048 } while (*pos && !is_dir_sep(*pos));
2049 }
2050
2051 return pos + is_dir_sep(*pos) - path;
2052 }
2053
2054 int xutftowcsn(wchar_t *wcs, const char *utfs, size_t wcslen, int utflen)
2055 {
2056 int upos = 0, wpos = 0;
2057 const unsigned char *utf = (const unsigned char*) utfs;
2058 if (!utf || !wcs || wcslen < 1) {
2059 errno = EINVAL;
2060 return -1;
2061 }
2062 /* reserve space for \0 */
2063 wcslen--;
2064 if (utflen < 0)
2065 utflen = INT_MAX;
2066
2067 while (upos < utflen) {
2068 int c = utf[upos++] & 0xff;
2069 if (utflen == INT_MAX && c == 0)
2070 break;
2071
2072 if (wpos >= wcslen) {
2073 wcs[wpos] = 0;
2074 errno = ERANGE;
2075 return -1;
2076 }
2077
2078 if (c < 0x80) {
2079 /* ASCII */
2080 wcs[wpos++] = c;
2081 } else if (c >= 0xc2 && c < 0xe0 && upos < utflen &&
2082 (utf[upos] & 0xc0) == 0x80) {
2083 /* 2-byte utf-8 */
2084 c = ((c & 0x1f) << 6);
2085 c |= (utf[upos++] & 0x3f);
2086 wcs[wpos++] = c;
2087 } else if (c >= 0xe0 && c < 0xf0 && upos + 1 < utflen &&
2088 !(c == 0xe0 && utf[upos] < 0xa0) && /* over-long encoding */
2089 (utf[upos] & 0xc0) == 0x80 &&
2090 (utf[upos + 1] & 0xc0) == 0x80) {
2091 /* 3-byte utf-8 */
2092 c = ((c & 0x0f) << 12);
2093 c |= ((utf[upos++] & 0x3f) << 6);
2094 c |= (utf[upos++] & 0x3f);
2095 wcs[wpos++] = c;
2096 } else if (c >= 0xf0 && c < 0xf5 && upos + 2 < utflen &&
2097 wpos + 1 < wcslen &&
2098 !(c == 0xf0 && utf[upos] < 0x90) && /* over-long encoding */
2099 !(c == 0xf4 && utf[upos] >= 0x90) && /* > \u10ffff */
2100 (utf[upos] & 0xc0) == 0x80 &&
2101 (utf[upos + 1] & 0xc0) == 0x80 &&
2102 (utf[upos + 2] & 0xc0) == 0x80) {
2103 /* 4-byte utf-8: convert to \ud8xx \udcxx surrogate pair */
2104 c = ((c & 0x07) << 18);
2105 c |= ((utf[upos++] & 0x3f) << 12);
2106 c |= ((utf[upos++] & 0x3f) << 6);
2107 c |= (utf[upos++] & 0x3f);
2108 c -= 0x10000;
2109 wcs[wpos++] = 0xd800 | (c >> 10);
2110 wcs[wpos++] = 0xdc00 | (c & 0x3ff);
2111 } else if (c >= 0xa0) {
2112 /* invalid utf-8 byte, printable unicode char: convert 1:1 */
2113 wcs[wpos++] = c;
2114 } else {
2115 /* invalid utf-8 byte, non-printable unicode: convert to hex */
2116 static const char *hex = "0123456789abcdef";
2117 wcs[wpos++] = hex[c >> 4];
2118 if (wpos < wcslen)
2119 wcs[wpos++] = hex[c & 0x0f];
2120 }
2121 }
2122 wcs[wpos] = 0;
2123 return wpos;
2124 }
2125
2126 int xwcstoutf(char *utf, const wchar_t *wcs, size_t utflen)
2127 {
2128 if (!wcs || !utf || utflen < 1) {
2129 errno = EINVAL;
2130 return -1;
2131 }
2132 utflen = WideCharToMultiByte(CP_UTF8, 0, wcs, -1, utf, utflen, NULL, NULL);
2133 if (utflen)
2134 return utflen - 1;
2135 errno = ERANGE;
2136 return -1;
2137 }
2138
2139 static void setup_windows_environment(void)
2140 {
2141 char *tmp = getenv("TMPDIR");
2142
2143 /* on Windows it is TMP and TEMP */
2144 if (!tmp) {
2145 if (!(tmp = getenv("TMP")))
2146 tmp = getenv("TEMP");
2147 if (tmp) {
2148 setenv("TMPDIR", tmp, 1);
2149 tmp = getenv("TMPDIR");
2150 }
2151 }
2152
2153 if (tmp) {
2154 /*
2155 * Convert all dir separators to forward slashes,
2156 * to help shell commands called from the Git
2157 * executable (by not mistaking the dir separators
2158 * for escape characters).
2159 */
2160 convert_slashes(tmp);
2161 }
2162
2163 /* simulate TERM to enable auto-color (see color.c) */
2164 if (!getenv("TERM"))
2165 setenv("TERM", "cygwin", 1);
2166 }
2167
2168 int is_valid_win32_path(const char *path)
2169 {
2170 int preceding_space_or_period = 0, i = 0, periods = 0;
2171
2172 if (!protect_ntfs)
2173 return 1;
2174
2175 skip_dos_drive_prefix((char **)&path);
2176
2177 for (;;) {
2178 char c = *(path++);
2179 switch (c) {
2180 case '\0':
2181 case '/': case '\\':
2182 /* cannot end in ` ` or `.`, except for `.` and `..` */
2183 if (preceding_space_or_period &&
2184 (i != periods || periods > 2))
2185 return 0;
2186 if (!c)
2187 return 1;
2188
2189 i = periods = preceding_space_or_period = 0;
2190 continue;
2191 case '.':
2192 periods++;
2193 /* fallthru */
2194 case ' ':
2195 preceding_space_or_period = 1;
2196 i++;
2197 continue;
2198 case ':': /* DOS drive prefix was already skipped */
2199 case '<': case '>': case '"': case '|': case '?': case '*':
2200 /* illegal character */
2201 return 0;
2202 default:
2203 if (c > '\0' && c < '\x20')
2204 /* illegal character */
2205 return 0;
2206 }
2207 preceding_space_or_period = 0;
2208 i++;
2209 }
2210 }
2211
2212 /*
2213 * Disable MSVCRT command line wildcard expansion (__getmainargs called from
2214 * mingw startup code, see init.c in mingw runtime).
2215 */
2216 int _CRT_glob = 0;
2217
2218 typedef struct {
2219 int newmode;
2220 } _startupinfo;
2221
2222 extern int __wgetmainargs(int *argc, wchar_t ***argv, wchar_t ***env, int glob,
2223 _startupinfo *si);
2224
2225 static NORETURN void die_startup(void)
2226 {
2227 fputs("fatal: not enough memory for initialization", stderr);
2228 exit(128);
2229 }
2230
2231 static void *malloc_startup(size_t size)
2232 {
2233 void *result = malloc(size);
2234 if (!result)
2235 die_startup();
2236 return result;
2237 }
2238
2239 static char *wcstoutfdup_startup(char *buffer, const wchar_t *wcs, size_t len)
2240 {
2241 len = xwcstoutf(buffer, wcs, len) + 1;
2242 return memcpy(malloc_startup(len), buffer, len);
2243 }
2244
2245 static void maybe_redirect_std_handle(const wchar_t *key, DWORD std_id, int fd,
2246 DWORD desired_access, DWORD flags)
2247 {
2248 DWORD create_flag = fd ? OPEN_ALWAYS : OPEN_EXISTING;
2249 wchar_t buf[MAX_PATH];
2250 DWORD max = ARRAY_SIZE(buf);
2251 HANDLE handle;
2252 DWORD ret = GetEnvironmentVariableW(key, buf, max);
2253
2254 if (!ret || ret >= max)
2255 return;
2256
2257 /* make sure this does not leak into child processes */
2258 SetEnvironmentVariableW(key, NULL);
2259 if (!wcscmp(buf, L"off")) {
2260 close(fd);
2261 handle = GetStdHandle(std_id);
2262 if (handle != INVALID_HANDLE_VALUE)
2263 CloseHandle(handle);
2264 return;
2265 }
2266 if (std_id == STD_ERROR_HANDLE && !wcscmp(buf, L"2>&1")) {
2267 handle = GetStdHandle(STD_OUTPUT_HANDLE);
2268 if (handle == INVALID_HANDLE_VALUE) {
2269 close(fd);
2270 handle = GetStdHandle(std_id);
2271 if (handle != INVALID_HANDLE_VALUE)
2272 CloseHandle(handle);
2273 } else {
2274 int new_fd = _open_osfhandle((intptr_t)handle, O_BINARY);
2275 SetStdHandle(std_id, handle);
2276 dup2(new_fd, fd);
2277 /* do *not* close the new_fd: that would close stdout */
2278 }
2279 return;
2280 }
2281 handle = CreateFileW(buf, desired_access, 0, NULL, create_flag,
2282 flags, NULL);
2283 if (handle != INVALID_HANDLE_VALUE) {
2284 int new_fd = _open_osfhandle((intptr_t)handle, O_BINARY);
2285 SetStdHandle(std_id, handle);
2286 dup2(new_fd, fd);
2287 close(new_fd);
2288 }
2289 }
2290
2291 static void maybe_redirect_std_handles(void)
2292 {
2293 maybe_redirect_std_handle(L"GIT_REDIRECT_STDIN", STD_INPUT_HANDLE, 0,
2294 GENERIC_READ, FILE_ATTRIBUTE_NORMAL);
2295 maybe_redirect_std_handle(L"GIT_REDIRECT_STDOUT", STD_OUTPUT_HANDLE, 1,
2296 GENERIC_WRITE, FILE_ATTRIBUTE_NORMAL);
2297 maybe_redirect_std_handle(L"GIT_REDIRECT_STDERR", STD_ERROR_HANDLE, 2,
2298 GENERIC_WRITE, FILE_FLAG_NO_BUFFERING);
2299 }
2300
2301 void mingw_startup(void)
2302 {
2303 int i, maxlen, argc;
2304 char *buffer;
2305 wchar_t **wenv, **wargv;
2306 _startupinfo si;
2307
2308 maybe_redirect_std_handles();
2309
2310 /* get wide char arguments and environment */
2311 si.newmode = 0;
2312 if (__wgetmainargs(&argc, &wargv, &wenv, _CRT_glob, &si) < 0)
2313 die_startup();
2314
2315 /* determine size of argv and environ conversion buffer */
2316 maxlen = wcslen(wargv[0]);
2317 for (i = 1; i < argc; i++)
2318 maxlen = max(maxlen, wcslen(wargv[i]));
2319 for (i = 0; wenv[i]; i++)
2320 maxlen = max(maxlen, wcslen(wenv[i]));
2321
2322 /*
2323 * nedmalloc can't free CRT memory, allocate resizable environment
2324 * list. Note that xmalloc / xmemdupz etc. call getenv, so we cannot
2325 * use it while initializing the environment itself.
2326 */
2327 environ_size = i + 1;
2328 environ_alloc = alloc_nr(environ_size * sizeof(char*));
2329 environ = malloc_startup(environ_alloc);
2330
2331 /* allocate buffer (wchar_t encodes to max 3 UTF-8 bytes) */
2332 maxlen = 3 * maxlen + 1;
2333 buffer = malloc_startup(maxlen);
2334
2335 /* convert command line arguments and environment to UTF-8 */
2336 for (i = 0; i < argc; i++)
2337 __argv[i] = wcstoutfdup_startup(buffer, wargv[i], maxlen);
2338 for (i = 0; wenv[i]; i++)
2339 environ[i] = wcstoutfdup_startup(buffer, wenv[i], maxlen);
2340 environ[i] = NULL;
2341 free(buffer);
2342
2343 /* sort environment for O(log n) getenv / putenv */
2344 qsort(environ, i, sizeof(char*), compareenv);
2345
2346 /* fix Windows specific environment settings */
2347 setup_windows_environment();
2348
2349 /* initialize critical section for waitpid pinfo_t list */
2350 InitializeCriticalSection(&pinfo_cs);
2351
2352 /* set up default file mode and file modes for stdin/out/err */
2353 _fmode = _O_BINARY;
2354 _setmode(_fileno(stdin), _O_BINARY);
2355 _setmode(_fileno(stdout), _O_BINARY);
2356 _setmode(_fileno(stderr), _O_BINARY);
2357
2358 /* initialize Unicode console */
2359 winansi_init();
2360 }
2361
2362 int uname(struct utsname *buf)
2363 {
2364 unsigned v = (unsigned)GetVersion();
2365 memset(buf, 0, sizeof(*buf));
2366 xsnprintf(buf->sysname, sizeof(buf->sysname), "Windows");
2367 xsnprintf(buf->release, sizeof(buf->release),
2368 "%u.%u", v & 0xff, (v >> 8) & 0xff);
2369 /* assuming NT variants only.. */
2370 xsnprintf(buf->version, sizeof(buf->version),
2371 "%u", (v >> 16) & 0x7fff);
2372 return 0;
2373 }
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