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Git 2.8.4
[alt-git.git] / compat / mingw.c
bloba8218e6f0f2177e769cf3841b1c7d7d9b9ed270d
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 wchar_t wpointer[MAX_PATH];
841 if (!_wgetcwd(wpointer, ARRAY_SIZE(wpointer)))
842 return NULL;
843 if (xwcstoutf(pointer, wpointer, len) < 0)
844 return NULL;
845 convert_slashes(pointer);
846 return pointer;
847 }
848
849 /*
850 * See http://msdn2.microsoft.com/en-us/library/17w5ykft(vs.71).aspx
851 * (Parsing C++ Command-Line Arguments)
852 */
853 static const char *quote_arg(const char *arg)
854 {
855 /* count chars to quote */
856 int len = 0, n = 0;
857 int force_quotes = 0;
858 char *q, *d;
859 const char *p = arg;
860 if (!*p) force_quotes = 1;
861 while (*p) {
862 if (isspace(*p) || *p == '*' || *p == '?' || *p == '{' || *p == '\'')
863 force_quotes = 1;
864 else if (*p == '"')
865 n++;
866 else if (*p == '\\') {
867 int count = 0;
868 while (*p == '\\') {
869 count++;
870 p++;
871 len++;
872 }
873 if (*p == '"')
874 n += count*2 + 1;
875 continue;
876 }
877 len++;
878 p++;
879 }
880 if (!force_quotes && n == 0)
881 return arg;
882
883 /* insert \ where necessary */
884 d = q = xmalloc(st_add3(len, n, 3));
885 *d++ = '"';
886 while (*arg) {
887 if (*arg == '"')
888 *d++ = '\\';
889 else if (*arg == '\\') {
890 int count = 0;
891 while (*arg == '\\') {
892 count++;
893 *d++ = *arg++;
894 }
895 if (*arg == '"') {
896 while (count-- > 0)
897 *d++ = '\\';
898 *d++ = '\\';
899 }
900 }
901 *d++ = *arg++;
902 }
903 *d++ = '"';
904 *d++ = 0;
905 return q;
906 }
907
908 static const char *parse_interpreter(const char *cmd)
909 {
910 static char buf[100];
911 char *p, *opt;
912 int n, fd;
913
914 /* don't even try a .exe */
915 n = strlen(cmd);
916 if (n >= 4 && !strcasecmp(cmd+n-4, ".exe"))
917 return NULL;
918
919 fd = open(cmd, O_RDONLY);
920 if (fd < 0)
921 return NULL;
922 n = read(fd, buf, sizeof(buf)-1);
923 close(fd);
924 if (n < 4) /* at least '#!/x' and not error */
925 return NULL;
926
927 if (buf[0] != '#' || buf[1] != '!')
928 return NULL;
929 buf[n] = '\0';
930 p = buf + strcspn(buf, "\r\n");
931 if (!*p)
932 return NULL;
933
934 *p = '\0';
935 if (!(p = strrchr(buf+2, '/')) && !(p = strrchr(buf+2, '\\')))
936 return NULL;
937 /* strip options */
938 if ((opt = strchr(p+1, ' ')))
939 *opt = '\0';
940 return p+1;
941 }
942
943 /*
944 * Splits the PATH into parts.
945 */
946 static char **get_path_split(void)
947 {
948 char *p, **path, *envpath = mingw_getenv("PATH");
949 int i, n = 0;
950
951 if (!envpath || !*envpath)
952 return NULL;
953
954 envpath = xstrdup(envpath);
955 p = envpath;
956 while (p) {
957 char *dir = p;
958 p = strchr(p, ';');
959 if (p) *p++ = '\0';
960 if (*dir) { /* not earlier, catches series of ; */
961 ++n;
962 }
963 }
964 if (!n)
965 return NULL;
966
967 ALLOC_ARRAY(path, n + 1);
968 p = envpath;
969 i = 0;
970 do {
971 if (*p)
972 path[i++] = xstrdup(p);
973 p = p+strlen(p)+1;
974 } while (i < n);
975 path[i] = NULL;
976
977 free(envpath);
978
979 return path;
980 }
981
982 static void free_path_split(char **path)
983 {
984 char **p = path;
985
986 if (!path)
987 return;
988
989 while (*p)
990 free(*p++);
991 free(path);
992 }
993
994 /*
995 * exe_only means that we only want to detect .exe files, but not scripts
996 * (which do not have an extension)
997 */
998 static char *lookup_prog(const char *dir, const char *cmd, int isexe, int exe_only)
999 {
1000 char path[MAX_PATH];
1001 snprintf(path, sizeof(path), "%s/%s.exe", dir, cmd);
1002
1003 if (!isexe && access(path, F_OK) == 0)
1004 return xstrdup(path);
1005 path[strlen(path)-4] = '\0';
1006 if ((!exe_only || isexe) && access(path, F_OK) == 0)
1007 if (!(GetFileAttributes(path) & FILE_ATTRIBUTE_DIRECTORY))
1008 return xstrdup(path);
1009 return NULL;
1010 }
1011
1012 /*
1013 * Determines the absolute path of cmd using the split path in path.
1014 * If cmd contains a slash or backslash, no lookup is performed.
1015 */
1016 static char *path_lookup(const char *cmd, char **path, int exe_only)
1017 {
1018 char *prog = NULL;
1019 int len = strlen(cmd);
1020 int isexe = len >= 4 && !strcasecmp(cmd+len-4, ".exe");
1021
1022 if (strchr(cmd, '/') || strchr(cmd, '\\'))
1023 prog = xstrdup(cmd);
1024
1025 while (!prog && *path)
1026 prog = lookup_prog(*path++, cmd, isexe, exe_only);
1027
1028 return prog;
1029 }
1030
1031 static int do_putenv(char **env, const char *name, int size, int free_old);
1032
1033 /* used number of elements of environ array, including terminating NULL */
1034 static int environ_size = 0;
1035 /* allocated size of environ array, in bytes */
1036 static int environ_alloc = 0;
1037
1038 /*
1039 * Create environment block suitable for CreateProcess. Merges current
1040 * process environment and the supplied environment changes.
1041 */
1042 static wchar_t *make_environment_block(char **deltaenv)
1043 {
1044 wchar_t *wenvblk = NULL;
1045 char **tmpenv;
1046 int i = 0, size = environ_size, wenvsz = 0, wenvpos = 0;
1047
1048 while (deltaenv && deltaenv[i])
1049 i++;
1050
1051 /* copy the environment, leaving space for changes */
1052 ALLOC_ARRAY(tmpenv, size + i);
1053 memcpy(tmpenv, environ, size * sizeof(char*));
1054
1055 /* merge supplied environment changes into the temporary environment */
1056 for (i = 0; deltaenv && deltaenv[i]; i++)
1057 size = do_putenv(tmpenv, deltaenv[i], size, 0);
1058
1059 /* create environment block from temporary environment */
1060 for (i = 0; tmpenv[i]; i++) {
1061 size = 2 * strlen(tmpenv[i]) + 2; /* +2 for final \0 */
1062 ALLOC_GROW(wenvblk, (wenvpos + size) * sizeof(wchar_t), wenvsz);
1063 wenvpos += xutftowcs(&wenvblk[wenvpos], tmpenv[i], size) + 1;
1064 }
1065 /* add final \0 terminator */
1066 wenvblk[wenvpos] = 0;
1067 free(tmpenv);
1068 return wenvblk;
1069 }
1070
1071 struct pinfo_t {
1072 struct pinfo_t *next;
1073 pid_t pid;
1074 HANDLE proc;
1075 };
1076 static struct pinfo_t *pinfo = NULL;
1077 CRITICAL_SECTION pinfo_cs;
1078
1079 static pid_t mingw_spawnve_fd(const char *cmd, const char **argv, char **deltaenv,
1080 const char *dir,
1081 int prepend_cmd, int fhin, int fhout, int fherr)
1082 {
1083 STARTUPINFOW si;
1084 PROCESS_INFORMATION pi;
1085 struct strbuf args;
1086 wchar_t wcmd[MAX_PATH], wdir[MAX_PATH], *wargs, *wenvblk = NULL;
1087 unsigned flags = CREATE_UNICODE_ENVIRONMENT;
1088 BOOL ret;
1089
1090 /* Determine whether or not we are associated to a console */
1091 HANDLE cons = CreateFile("CONOUT$", GENERIC_WRITE,
1092 FILE_SHARE_WRITE, NULL, OPEN_EXISTING,
1093 FILE_ATTRIBUTE_NORMAL, NULL);
1094 if (cons == INVALID_HANDLE_VALUE) {
1095 /* There is no console associated with this process.
1096 * Since the child is a console process, Windows
1097 * would normally create a console window. But
1098 * since we'll be redirecting std streams, we do
1099 * not need the console.
1100 * It is necessary to use DETACHED_PROCESS
1101 * instead of CREATE_NO_WINDOW to make ssh
1102 * recognize that it has no console.
1103 */
1104 flags |= DETACHED_PROCESS;
1105 } else {
1106 /* There is already a console. If we specified
1107 * DETACHED_PROCESS here, too, Windows would
1108 * disassociate the child from the console.
1109 * The same is true for CREATE_NO_WINDOW.
1110 * Go figure!
1111 */
1112 CloseHandle(cons);
1113 }
1114 memset(&si, 0, sizeof(si));
1115 si.cb = sizeof(si);
1116 si.dwFlags = STARTF_USESTDHANDLES;
1117 si.hStdInput = winansi_get_osfhandle(fhin);
1118 si.hStdOutput = winansi_get_osfhandle(fhout);
1119 si.hStdError = winansi_get_osfhandle(fherr);
1120
1121 if (xutftowcs_path(wcmd, cmd) < 0)
1122 return -1;
1123 if (dir && xutftowcs_path(wdir, dir) < 0)
1124 return -1;
1125
1126 /* concatenate argv, quoting args as we go */
1127 strbuf_init(&args, 0);
1128 if (prepend_cmd) {
1129 char *quoted = (char *)quote_arg(cmd);
1130 strbuf_addstr(&args, quoted);
1131 if (quoted != cmd)
1132 free(quoted);
1133 }
1134 for (; *argv; argv++) {
1135 char *quoted = (char *)quote_arg(*argv);
1136 if (*args.buf)
1137 strbuf_addch(&args, ' ');
1138 strbuf_addstr(&args, quoted);
1139 if (quoted != *argv)
1140 free(quoted);
1141 }
1142
1143 ALLOC_ARRAY(wargs, st_add(st_mult(2, args.len), 1));
1144 xutftowcs(wargs, args.buf, 2 * args.len + 1);
1145 strbuf_release(&args);
1146
1147 wenvblk = make_environment_block(deltaenv);
1148
1149 memset(&pi, 0, sizeof(pi));
1150 ret = CreateProcessW(wcmd, wargs, NULL, NULL, TRUE, flags,
1151 wenvblk, dir ? wdir : NULL, &si, &pi);
1152
1153 free(wenvblk);
1154 free(wargs);
1155
1156 if (!ret) {
1157 errno = ENOENT;
1158 return -1;
1159 }
1160 CloseHandle(pi.hThread);
1161
1162 /*
1163 * The process ID is the human-readable identifier of the process
1164 * that we want to present in log and error messages. The handle
1165 * is not useful for this purpose. But we cannot close it, either,
1166 * because it is not possible to turn a process ID into a process
1167 * handle after the process terminated.
1168 * Keep the handle in a list for waitpid.
1169 */
1170 EnterCriticalSection(&pinfo_cs);
1171 {
1172 struct pinfo_t *info = xmalloc(sizeof(struct pinfo_t));
1173 info->pid = pi.dwProcessId;
1174 info->proc = pi.hProcess;
1175 info->next = pinfo;
1176 pinfo = info;
1177 }
1178 LeaveCriticalSection(&pinfo_cs);
1179
1180 return (pid_t)pi.dwProcessId;
1181 }
1182
1183 static pid_t mingw_spawnv(const char *cmd, const char **argv, int prepend_cmd)
1184 {
1185 return mingw_spawnve_fd(cmd, argv, NULL, NULL, prepend_cmd, 0, 1, 2);
1186 }
1187
1188 pid_t mingw_spawnvpe(const char *cmd, const char **argv, char **deltaenv,
1189 const char *dir,
1190 int fhin, int fhout, int fherr)
1191 {
1192 pid_t pid;
1193 char **path = get_path_split();
1194 char *prog = path_lookup(cmd, path, 0);
1195
1196 if (!prog) {
1197 errno = ENOENT;
1198 pid = -1;
1199 }
1200 else {
1201 const char *interpr = parse_interpreter(prog);
1202
1203 if (interpr) {
1204 const char *argv0 = argv[0];
1205 char *iprog = path_lookup(interpr, path, 1);
1206 argv[0] = prog;
1207 if (!iprog) {
1208 errno = ENOENT;
1209 pid = -1;
1210 }
1211 else {
1212 pid = mingw_spawnve_fd(iprog, argv, deltaenv, dir, 1,
1213 fhin, fhout, fherr);
1214 free(iprog);
1215 }
1216 argv[0] = argv0;
1217 }
1218 else
1219 pid = mingw_spawnve_fd(prog, argv, deltaenv, dir, 0,
1220 fhin, fhout, fherr);
1221 free(prog);
1222 }
1223 free_path_split(path);
1224 return pid;
1225 }
1226
1227 static int try_shell_exec(const char *cmd, char *const *argv)
1228 {
1229 const char *interpr = parse_interpreter(cmd);
1230 char **path;
1231 char *prog;
1232 int pid = 0;
1233
1234 if (!interpr)
1235 return 0;
1236 path = get_path_split();
1237 prog = path_lookup(interpr, path, 1);
1238 if (prog) {
1239 int argc = 0;
1240 const char **argv2;
1241 while (argv[argc]) argc++;
1242 ALLOC_ARRAY(argv2, argc + 1);
1243 argv2[0] = (char *)cmd; /* full path to the script file */
1244 memcpy(&argv2[1], &argv[1], sizeof(*argv) * argc);
1245 pid = mingw_spawnv(prog, argv2, 1);
1246 if (pid >= 0) {
1247 int status;
1248 if (waitpid(pid, &status, 0) < 0)
1249 status = 255;
1250 exit(status);
1251 }
1252 pid = 1; /* indicate that we tried but failed */
1253 free(prog);
1254 free(argv2);
1255 }
1256 free_path_split(path);
1257 return pid;
1258 }
1259
1260 int mingw_execv(const char *cmd, char *const *argv)
1261 {
1262 /* check if git_command is a shell script */
1263 if (!try_shell_exec(cmd, argv)) {
1264 int pid, status;
1265
1266 pid = mingw_spawnv(cmd, (const char **)argv, 0);
1267 if (pid < 0)
1268 return -1;
1269 if (waitpid(pid, &status, 0) < 0)
1270 status = 255;
1271 exit(status);
1272 }
1273 return -1;
1274 }
1275
1276 int mingw_execvp(const char *cmd, char *const *argv)
1277 {
1278 char **path = get_path_split();
1279 char *prog = path_lookup(cmd, path, 0);
1280
1281 if (prog) {
1282 mingw_execv(prog, argv);
1283 free(prog);
1284 } else
1285 errno = ENOENT;
1286
1287 free_path_split(path);
1288 return -1;
1289 }
1290
1291 int mingw_kill(pid_t pid, int sig)
1292 {
1293 if (pid > 0 && sig == SIGTERM) {
1294 HANDLE h = OpenProcess(PROCESS_TERMINATE, FALSE, pid);
1295
1296 if (TerminateProcess(h, -1)) {
1297 CloseHandle(h);
1298 return 0;
1299 }
1300
1301 errno = err_win_to_posix(GetLastError());
1302 CloseHandle(h);
1303 return -1;
1304 } else if (pid > 0 && sig == 0) {
1305 HANDLE h = OpenProcess(PROCESS_QUERY_INFORMATION, FALSE, pid);
1306 if (h) {
1307 CloseHandle(h);
1308 return 0;
1309 }
1310 }
1311
1312 errno = EINVAL;
1313 return -1;
1314 }
1315
1316 /*
1317 * Compare environment entries by key (i.e. stopping at '=' or '\0').
1318 */
1319 static int compareenv(const void *v1, const void *v2)
1320 {
1321 const char *e1 = *(const char**)v1;
1322 const char *e2 = *(const char**)v2;
1323
1324 for (;;) {
1325 int c1 = *e1++;
1326 int c2 = *e2++;
1327 c1 = (c1 == '=') ? 0 : tolower(c1);
1328 c2 = (c2 == '=') ? 0 : tolower(c2);
1329 if (c1 > c2)
1330 return 1;
1331 if (c1 < c2)
1332 return -1;
1333 if (c1 == 0)
1334 return 0;
1335 }
1336 }
1337
1338 static int bsearchenv(char **env, const char *name, size_t size)
1339 {
1340 unsigned low = 0, high = size;
1341 while (low < high) {
1342 unsigned mid = low + ((high - low) >> 1);
1343 int cmp = compareenv(&env[mid], &name);
1344 if (cmp < 0)
1345 low = mid + 1;
1346 else if (cmp > 0)
1347 high = mid;
1348 else
1349 return mid;
1350 }
1351 return ~low; /* not found, return 1's complement of insert position */
1352 }
1353
1354 /*
1355 * If name contains '=', then sets the variable, otherwise it unsets it
1356 * Size includes the terminating NULL. Env must have room for size + 1 entries
1357 * (in case of insert). Returns the new size. Optionally frees removed entries.
1358 */
1359 static int do_putenv(char **env, const char *name, int size, int free_old)
1360 {
1361 int i = bsearchenv(env, name, size - 1);
1362
1363 /* optionally free removed / replaced entry */
1364 if (i >= 0 && free_old)
1365 free(env[i]);
1366
1367 if (strchr(name, '=')) {
1368 /* if new value ('key=value') is specified, insert or replace entry */
1369 if (i < 0) {
1370 i = ~i;
1371 memmove(&env[i + 1], &env[i], (size - i) * sizeof(char*));
1372 size++;
1373 }
1374 env[i] = (char*) name;
1375 } else if (i >= 0) {
1376 /* otherwise ('key') remove existing entry */
1377 size--;
1378 memmove(&env[i], &env[i + 1], (size - i) * sizeof(char*));
1379 }
1380 return size;
1381 }
1382
1383 char *mingw_getenv(const char *name)
1384 {
1385 char *value;
1386 int pos = bsearchenv(environ, name, environ_size - 1);
1387 if (pos < 0)
1388 return NULL;
1389 value = strchr(environ[pos], '=');
1390 return value ? &value[1] : NULL;
1391 }
1392
1393 int mingw_putenv(const char *namevalue)
1394 {
1395 ALLOC_GROW(environ, (environ_size + 1) * sizeof(char*), environ_alloc);
1396 environ_size = do_putenv(environ, namevalue, environ_size, 1);
1397 return 0;
1398 }
1399
1400 /*
1401 * Note, this isn't a complete replacement for getaddrinfo. It assumes
1402 * that service contains a numerical port, or that it is null. It
1403 * does a simple search using gethostbyname, and returns one IPv4 host
1404 * if one was found.
1405 */
1406 static int WSAAPI getaddrinfo_stub(const char *node, const char *service,
1407 const struct addrinfo *hints,
1408 struct addrinfo **res)
1409 {
1410 struct hostent *h = NULL;
1411 struct addrinfo *ai;
1412 struct sockaddr_in *sin;
1413
1414 if (node) {
1415 h = gethostbyname(node);
1416 if (!h)
1417 return WSAGetLastError();
1418 }
1419
1420 ai = xmalloc(sizeof(struct addrinfo));
1421 *res = ai;
1422 ai->ai_flags = 0;
1423 ai->ai_family = AF_INET;
1424 ai->ai_socktype = hints ? hints->ai_socktype : 0;
1425 switch (ai->ai_socktype) {
1426 case SOCK_STREAM:
1427 ai->ai_protocol = IPPROTO_TCP;
1428 break;
1429 case SOCK_DGRAM:
1430 ai->ai_protocol = IPPROTO_UDP;
1431 break;
1432 default:
1433 ai->ai_protocol = 0;
1434 break;
1435 }
1436 ai->ai_addrlen = sizeof(struct sockaddr_in);
1437 if (hints && (hints->ai_flags & AI_CANONNAME))
1438 ai->ai_canonname = h ? xstrdup(h->h_name) : NULL;
1439 else
1440 ai->ai_canonname = NULL;
1441
1442 sin = xcalloc(1, ai->ai_addrlen);
1443 sin->sin_family = AF_INET;
1444 /* Note: getaddrinfo is supposed to allow service to be a string,
1445 * which should be looked up using getservbyname. This is
1446 * currently not implemented */
1447 if (service)
1448 sin->sin_port = htons(atoi(service));
1449 if (h)
1450 sin->sin_addr = *(struct in_addr *)h->h_addr;
1451 else if (hints && (hints->ai_flags & AI_PASSIVE))
1452 sin->sin_addr.s_addr = INADDR_ANY;
1453 else
1454 sin->sin_addr.s_addr = INADDR_LOOPBACK;
1455 ai->ai_addr = (struct sockaddr *)sin;
1456 ai->ai_next = NULL;
1457 return 0;
1458 }
1459
1460 static void WSAAPI freeaddrinfo_stub(struct addrinfo *res)
1461 {
1462 free(res->ai_canonname);
1463 free(res->ai_addr);
1464 free(res);
1465 }
1466
1467 static int WSAAPI getnameinfo_stub(const struct sockaddr *sa, socklen_t salen,
1468 char *host, DWORD hostlen,
1469 char *serv, DWORD servlen, int flags)
1470 {
1471 const struct sockaddr_in *sin = (const struct sockaddr_in *)sa;
1472 if (sa->sa_family != AF_INET)
1473 return EAI_FAMILY;
1474 if (!host && !serv)
1475 return EAI_NONAME;
1476
1477 if (host && hostlen > 0) {
1478 struct hostent *ent = NULL;
1479 if (!(flags & NI_NUMERICHOST))
1480 ent = gethostbyaddr((const char *)&sin->sin_addr,
1481 sizeof(sin->sin_addr), AF_INET);
1482
1483 if (ent)
1484 snprintf(host, hostlen, "%s", ent->h_name);
1485 else if (flags & NI_NAMEREQD)
1486 return EAI_NONAME;
1487 else
1488 snprintf(host, hostlen, "%s", inet_ntoa(sin->sin_addr));
1489 }
1490
1491 if (serv && servlen > 0) {
1492 struct servent *ent = NULL;
1493 if (!(flags & NI_NUMERICSERV))
1494 ent = getservbyport(sin->sin_port,
1495 flags & NI_DGRAM ? "udp" : "tcp");
1496
1497 if (ent)
1498 snprintf(serv, servlen, "%s", ent->s_name);
1499 else
1500 snprintf(serv, servlen, "%d", ntohs(sin->sin_port));
1501 }
1502
1503 return 0;
1504 }
1505
1506 static HMODULE ipv6_dll = NULL;
1507 static void (WSAAPI *ipv6_freeaddrinfo)(struct addrinfo *res);
1508 static int (WSAAPI *ipv6_getaddrinfo)(const char *node, const char *service,
1509 const struct addrinfo *hints,
1510 struct addrinfo **res);
1511 static int (WSAAPI *ipv6_getnameinfo)(const struct sockaddr *sa, socklen_t salen,
1512 char *host, DWORD hostlen,
1513 char *serv, DWORD servlen, int flags);
1514 /*
1515 * gai_strerror is an inline function in the ws2tcpip.h header, so we
1516 * don't need to try to load that one dynamically.
1517 */
1518
1519 static void socket_cleanup(void)
1520 {
1521 WSACleanup();
1522 if (ipv6_dll)
1523 FreeLibrary(ipv6_dll);
1524 ipv6_dll = NULL;
1525 ipv6_freeaddrinfo = freeaddrinfo_stub;
1526 ipv6_getaddrinfo = getaddrinfo_stub;
1527 ipv6_getnameinfo = getnameinfo_stub;
1528 }
1529
1530 static void ensure_socket_initialization(void)
1531 {
1532 WSADATA wsa;
1533 static int initialized = 0;
1534 const char *libraries[] = { "ws2_32.dll", "wship6.dll", NULL };
1535 const char **name;
1536
1537 if (initialized)
1538 return;
1539
1540 if (WSAStartup(MAKEWORD(2,2), &wsa))
1541 die("unable to initialize winsock subsystem, error %d",
1542 WSAGetLastError());
1543
1544 for (name = libraries; *name; name++) {
1545 ipv6_dll = LoadLibrary(*name);
1546 if (!ipv6_dll)
1547 continue;
1548
1549 ipv6_freeaddrinfo = (void (WSAAPI *)(struct addrinfo *))
1550 GetProcAddress(ipv6_dll, "freeaddrinfo");
1551 ipv6_getaddrinfo = (int (WSAAPI *)(const char *, const char *,
1552 const struct addrinfo *,
1553 struct addrinfo **))
1554 GetProcAddress(ipv6_dll, "getaddrinfo");
1555 ipv6_getnameinfo = (int (WSAAPI *)(const struct sockaddr *,
1556 socklen_t, char *, DWORD,
1557 char *, DWORD, int))
1558 GetProcAddress(ipv6_dll, "getnameinfo");
1559 if (!ipv6_freeaddrinfo || !ipv6_getaddrinfo || !ipv6_getnameinfo) {
1560 FreeLibrary(ipv6_dll);
1561 ipv6_dll = NULL;
1562 } else
1563 break;
1564 }
1565 if (!ipv6_freeaddrinfo || !ipv6_getaddrinfo || !ipv6_getnameinfo) {
1566 ipv6_freeaddrinfo = freeaddrinfo_stub;
1567 ipv6_getaddrinfo = getaddrinfo_stub;
1568 ipv6_getnameinfo = getnameinfo_stub;
1569 }
1570
1571 atexit(socket_cleanup);
1572 initialized = 1;
1573 }
1574
1575 #undef gethostname
1576 int mingw_gethostname(char *name, int namelen)
1577 {
1578 ensure_socket_initialization();
1579 return gethostname(name, namelen);
1580 }
1581
1582 #undef gethostbyname
1583 struct hostent *mingw_gethostbyname(const char *host)
1584 {
1585 ensure_socket_initialization();
1586 return gethostbyname(host);
1587 }
1588
1589 void mingw_freeaddrinfo(struct addrinfo *res)
1590 {
1591 ipv6_freeaddrinfo(res);
1592 }
1593
1594 int mingw_getaddrinfo(const char *node, const char *service,
1595 const struct addrinfo *hints, struct addrinfo **res)
1596 {
1597 ensure_socket_initialization();
1598 return ipv6_getaddrinfo(node, service, hints, res);
1599 }
1600
1601 int mingw_getnameinfo(const struct sockaddr *sa, socklen_t salen,
1602 char *host, DWORD hostlen, char *serv, DWORD servlen,
1603 int flags)
1604 {
1605 ensure_socket_initialization();
1606 return ipv6_getnameinfo(sa, salen, host, hostlen, serv, servlen, flags);
1607 }
1608
1609 int mingw_socket(int domain, int type, int protocol)
1610 {
1611 int sockfd;
1612 SOCKET s;
1613
1614 ensure_socket_initialization();
1615 s = WSASocket(domain, type, protocol, NULL, 0, 0);
1616 if (s == INVALID_SOCKET) {
1617 /*
1618 * WSAGetLastError() values are regular BSD error codes
1619 * biased by WSABASEERR.
1620 * However, strerror() does not know about networking
1621 * specific errors, which are values beginning at 38 or so.
1622 * Therefore, we choose to leave the biased error code
1623 * in errno so that _if_ someone looks up the code somewhere,
1624 * then it is at least the number that are usually listed.
1625 */
1626 errno = WSAGetLastError();
1627 return -1;
1628 }
1629 /* convert into a file descriptor */
1630 if ((sockfd = _open_osfhandle(s, O_RDWR|O_BINARY)) < 0) {
1631 closesocket(s);
1632 return error("unable to make a socket file descriptor: %s",
1633 strerror(errno));
1634 }
1635 return sockfd;
1636 }
1637
1638 #undef connect
1639 int mingw_connect(int sockfd, struct sockaddr *sa, size_t sz)
1640 {
1641 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
1642 return connect(s, sa, sz);
1643 }
1644
1645 #undef bind
1646 int mingw_bind(int sockfd, struct sockaddr *sa, size_t sz)
1647 {
1648 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
1649 return bind(s, sa, sz);
1650 }
1651
1652 #undef setsockopt
1653 int mingw_setsockopt(int sockfd, int lvl, int optname, void *optval, int optlen)
1654 {
1655 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
1656 return setsockopt(s, lvl, optname, (const char*)optval, optlen);
1657 }
1658
1659 #undef shutdown
1660 int mingw_shutdown(int sockfd, int how)
1661 {
1662 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
1663 return shutdown(s, how);
1664 }
1665
1666 #undef listen
1667 int mingw_listen(int sockfd, int backlog)
1668 {
1669 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
1670 return listen(s, backlog);
1671 }
1672
1673 #undef accept
1674 int mingw_accept(int sockfd1, struct sockaddr *sa, socklen_t *sz)
1675 {
1676 int sockfd2;
1677
1678 SOCKET s1 = (SOCKET)_get_osfhandle(sockfd1);
1679 SOCKET s2 = accept(s1, sa, sz);
1680
1681 /* convert into a file descriptor */
1682 if ((sockfd2 = _open_osfhandle(s2, O_RDWR|O_BINARY)) < 0) {
1683 int err = errno;
1684 closesocket(s2);
1685 return error("unable to make a socket file descriptor: %s",
1686 strerror(err));
1687 }
1688 return sockfd2;
1689 }
1690
1691 #undef rename
1692 int mingw_rename(const char *pold, const char *pnew)
1693 {
1694 DWORD attrs, gle;
1695 int tries = 0;
1696 wchar_t wpold[MAX_PATH], wpnew[MAX_PATH];
1697 if (xutftowcs_path(wpold, pold) < 0 || xutftowcs_path(wpnew, pnew) < 0)
1698 return -1;
1699
1700 /*
1701 * Try native rename() first to get errno right.
1702 * It is based on MoveFile(), which cannot overwrite existing files.
1703 */
1704 if (!_wrename(wpold, wpnew))
1705 return 0;
1706 if (errno != EEXIST)
1707 return -1;
1708 repeat:
1709 if (MoveFileExW(wpold, wpnew, MOVEFILE_REPLACE_EXISTING))
1710 return 0;
1711 /* TODO: translate more errors */
1712 gle = GetLastError();
1713 if (gle == ERROR_ACCESS_DENIED &&
1714 (attrs = GetFileAttributesW(wpnew)) != INVALID_FILE_ATTRIBUTES) {
1715 if (attrs & FILE_ATTRIBUTE_DIRECTORY) {
1716 DWORD attrsold = GetFileAttributesW(wpold);
1717 if (attrsold == INVALID_FILE_ATTRIBUTES ||
1718 !(attrsold & FILE_ATTRIBUTE_DIRECTORY))
1719 errno = EISDIR;
1720 else if (!_wrmdir(wpnew))
1721 goto repeat;
1722 return -1;
1723 }
1724 if ((attrs & FILE_ATTRIBUTE_READONLY) &&
1725 SetFileAttributesW(wpnew, attrs & ~FILE_ATTRIBUTE_READONLY)) {
1726 if (MoveFileExW(wpold, wpnew, MOVEFILE_REPLACE_EXISTING))
1727 return 0;
1728 gle = GetLastError();
1729 /* revert file attributes on failure */
1730 SetFileAttributesW(wpnew, attrs);
1731 }
1732 }
1733 if (tries < ARRAY_SIZE(delay) && gle == ERROR_ACCESS_DENIED) {
1734 /*
1735 * We assume that some other process had the source or
1736 * destination file open at the wrong moment and retry.
1737 * In order to give the other process a higher chance to
1738 * complete its operation, we give up our time slice now.
1739 * If we have to retry again, we do sleep a bit.
1740 */
1741 Sleep(delay[tries]);
1742 tries++;
1743 goto repeat;
1744 }
1745 if (gle == ERROR_ACCESS_DENIED &&
1746 ask_yes_no_if_possible("Rename from '%s' to '%s' failed. "
1747 "Should I try again?", pold, pnew))
1748 goto repeat;
1749
1750 errno = EACCES;
1751 return -1;
1752 }
1753
1754 /*
1755 * Note that this doesn't return the actual pagesize, but
1756 * the allocation granularity. If future Windows specific git code
1757 * needs the real getpagesize function, we need to find another solution.
1758 */
1759 int mingw_getpagesize(void)
1760 {
1761 SYSTEM_INFO si;
1762 GetSystemInfo(&si);
1763 return si.dwAllocationGranularity;
1764 }
1765
1766 struct passwd *getpwuid(int uid)
1767 {
1768 static char user_name[100];
1769 static struct passwd p;
1770
1771 DWORD len = sizeof(user_name);
1772 if (!GetUserName(user_name, &len))
1773 return NULL;
1774 p.pw_name = user_name;
1775 p.pw_gecos = "unknown";
1776 p.pw_dir = NULL;
1777 return &p;
1778 }
1779
1780 static HANDLE timer_event;
1781 static HANDLE timer_thread;
1782 static int timer_interval;
1783 static int one_shot;
1784 static sig_handler_t timer_fn = SIG_DFL, sigint_fn = SIG_DFL;
1785
1786 /* The timer works like this:
1787 * The thread, ticktack(), is a trivial routine that most of the time
1788 * only waits to receive the signal to terminate. The main thread tells
1789 * the thread to terminate by setting the timer_event to the signalled
1790 * state.
1791 * But ticktack() interrupts the wait state after the timer's interval
1792 * length to call the signal handler.
1793 */
1794
1795 static unsigned __stdcall ticktack(void *dummy)
1796 {
1797 while (WaitForSingleObject(timer_event, timer_interval) == WAIT_TIMEOUT) {
1798 mingw_raise(SIGALRM);
1799 if (one_shot)
1800 break;
1801 }
1802 return 0;
1803 }
1804
1805 static int start_timer_thread(void)
1806 {
1807 timer_event = CreateEvent(NULL, FALSE, FALSE, NULL);
1808 if (timer_event) {
1809 timer_thread = (HANDLE) _beginthreadex(NULL, 0, ticktack, NULL, 0, NULL);
1810 if (!timer_thread )
1811 return errno = ENOMEM,
1812 error("cannot start timer thread");
1813 } else
1814 return errno = ENOMEM,
1815 error("cannot allocate resources for timer");
1816 return 0;
1817 }
1818
1819 static void stop_timer_thread(void)
1820 {
1821 if (timer_event)
1822 SetEvent(timer_event); /* tell thread to terminate */
1823 if (timer_thread) {
1824 int rc = WaitForSingleObject(timer_thread, 1000);
1825 if (rc == WAIT_TIMEOUT)
1826 error("timer thread did not terminate timely");
1827 else if (rc != WAIT_OBJECT_0)
1828 error("waiting for timer thread failed: %lu",
1829 GetLastError());
1830 CloseHandle(timer_thread);
1831 }
1832 if (timer_event)
1833 CloseHandle(timer_event);
1834 timer_event = NULL;
1835 timer_thread = NULL;
1836 }
1837
1838 static inline int is_timeval_eq(const struct timeval *i1, const struct timeval *i2)
1839 {
1840 return i1->tv_sec == i2->tv_sec && i1->tv_usec == i2->tv_usec;
1841 }
1842
1843 int setitimer(int type, struct itimerval *in, struct itimerval *out)
1844 {
1845 static const struct timeval zero;
1846 static int atexit_done;
1847
1848 if (out != NULL)
1849 return errno = EINVAL,
1850 error("setitimer param 3 != NULL not implemented");
1851 if (!is_timeval_eq(&in->it_interval, &zero) &&
1852 !is_timeval_eq(&in->it_interval, &in->it_value))
1853 return errno = EINVAL,
1854 error("setitimer: it_interval must be zero or eq it_value");
1855
1856 if (timer_thread)
1857 stop_timer_thread();
1858
1859 if (is_timeval_eq(&in->it_value, &zero) &&
1860 is_timeval_eq(&in->it_interval, &zero))
1861 return 0;
1862
1863 timer_interval = in->it_value.tv_sec * 1000 + in->it_value.tv_usec / 1000;
1864 one_shot = is_timeval_eq(&in->it_interval, &zero);
1865 if (!atexit_done) {
1866 atexit(stop_timer_thread);
1867 atexit_done = 1;
1868 }
1869 return start_timer_thread();
1870 }
1871
1872 int sigaction(int sig, struct sigaction *in, struct sigaction *out)
1873 {
1874 if (sig != SIGALRM)
1875 return errno = EINVAL,
1876 error("sigaction only implemented for SIGALRM");
1877 if (out != NULL)
1878 return errno = EINVAL,
1879 error("sigaction: param 3 != NULL not implemented");
1880
1881 timer_fn = in->sa_handler;
1882 return 0;
1883 }
1884
1885 #undef signal
1886 sig_handler_t mingw_signal(int sig, sig_handler_t handler)
1887 {
1888 sig_handler_t old;
1889
1890 switch (sig) {
1891 case SIGALRM:
1892 old = timer_fn;
1893 timer_fn = handler;
1894 break;
1895
1896 case SIGINT:
1897 old = sigint_fn;
1898 sigint_fn = handler;
1899 break;
1900
1901 default:
1902 return signal(sig, handler);
1903 }
1904
1905 return old;
1906 }
1907
1908 #undef raise
1909 int mingw_raise(int sig)
1910 {
1911 switch (sig) {
1912 case SIGALRM:
1913 if (timer_fn == SIG_DFL) {
1914 if (isatty(STDERR_FILENO))
1915 fputs("Alarm clock\n", stderr);
1916 exit(128 + SIGALRM);
1917 } else if (timer_fn != SIG_IGN)
1918 timer_fn(SIGALRM);
1919 return 0;
1920
1921 case SIGINT:
1922 if (sigint_fn == SIG_DFL)
1923 exit(128 + SIGINT);
1924 else if (sigint_fn != SIG_IGN)
1925 sigint_fn(SIGINT);
1926 return 0;
1927
1928 default:
1929 return raise(sig);
1930 }
1931 }
1932
1933
1934 static const char *make_backslash_path(const char *path)
1935 {
1936 static char buf[PATH_MAX + 1];
1937 char *c;
1938
1939 if (strlcpy(buf, path, PATH_MAX) >= PATH_MAX)
1940 die("Too long path: %.*s", 60, path);
1941
1942 for (c = buf; *c; c++) {
1943 if (*c == '/')
1944 *c = '\\';
1945 }
1946 return buf;
1947 }
1948
1949 void mingw_open_html(const char *unixpath)
1950 {
1951 const char *htmlpath = make_backslash_path(unixpath);
1952 typedef HINSTANCE (WINAPI *T)(HWND, const char *,
1953 const char *, const char *, const char *, INT);
1954 T ShellExecute;
1955 HMODULE shell32;
1956 int r;
1957
1958 shell32 = LoadLibrary("shell32.dll");
1959 if (!shell32)
1960 die("cannot load shell32.dll");
1961 ShellExecute = (T)GetProcAddress(shell32, "ShellExecuteA");
1962 if (!ShellExecute)
1963 die("cannot run browser");
1964
1965 printf("Launching default browser to display HTML ...\n");
1966 r = HCAST(int, ShellExecute(NULL, "open", htmlpath,
1967 NULL, "\\", SW_SHOWNORMAL));
1968 FreeLibrary(shell32);
1969 /* see the MSDN documentation referring to the result codes here */
1970 if (r <= 32) {
1971 die("failed to launch browser for %.*s", MAX_PATH, unixpath);
1972 }
1973 }
1974
1975 int link(const char *oldpath, const char *newpath)
1976 {
1977 typedef BOOL (WINAPI *T)(LPCWSTR, LPCWSTR, LPSECURITY_ATTRIBUTES);
1978 static T create_hard_link = NULL;
1979 wchar_t woldpath[MAX_PATH], wnewpath[MAX_PATH];
1980 if (xutftowcs_path(woldpath, oldpath) < 0 ||
1981 xutftowcs_path(wnewpath, newpath) < 0)
1982 return -1;
1983
1984 if (!create_hard_link) {
1985 create_hard_link = (T) GetProcAddress(
1986 GetModuleHandle("kernel32.dll"), "CreateHardLinkW");
1987 if (!create_hard_link)
1988 create_hard_link = (T)-1;
1989 }
1990 if (create_hard_link == (T)-1) {
1991 errno = ENOSYS;
1992 return -1;
1993 }
1994 if (!create_hard_link(wnewpath, woldpath, NULL)) {
1995 errno = err_win_to_posix(GetLastError());
1996 return -1;
1997 }
1998 return 0;
1999 }
2000
2001 pid_t waitpid(pid_t pid, int *status, int options)
2002 {
2003 HANDLE h = OpenProcess(SYNCHRONIZE | PROCESS_QUERY_INFORMATION,
2004 FALSE, pid);
2005 if (!h) {
2006 errno = ECHILD;
2007 return -1;
2008 }
2009
2010 if (pid > 0 && options & WNOHANG) {
2011 if (WAIT_OBJECT_0 != WaitForSingleObject(h, 0)) {
2012 CloseHandle(h);
2013 return 0;
2014 }
2015 options &= ~WNOHANG;
2016 }
2017
2018 if (options == 0) {
2019 struct pinfo_t **ppinfo;
2020 if (WaitForSingleObject(h, INFINITE) != WAIT_OBJECT_0) {
2021 CloseHandle(h);
2022 return 0;
2023 }
2024
2025 if (status)
2026 GetExitCodeProcess(h, (LPDWORD)status);
2027
2028 EnterCriticalSection(&pinfo_cs);
2029
2030 ppinfo = &pinfo;
2031 while (*ppinfo) {
2032 struct pinfo_t *info = *ppinfo;
2033 if (info->pid == pid) {
2034 CloseHandle(info->proc);
2035 *ppinfo = info->next;
2036 free(info);
2037 break;
2038 }
2039 ppinfo = &info->next;
2040 }
2041
2042 LeaveCriticalSection(&pinfo_cs);
2043
2044 CloseHandle(h);
2045 return pid;
2046 }
2047 CloseHandle(h);
2048
2049 errno = EINVAL;
2050 return -1;
2051 }
2052
2053 int mingw_skip_dos_drive_prefix(char **path)
2054 {
2055 int ret = has_dos_drive_prefix(*path);
2056 *path += ret;
2057 return ret;
2058 }
2059
2060 int mingw_offset_1st_component(const char *path)
2061 {
2062 char *pos = (char *)path;
2063
2064 /* unc paths */
2065 if (!skip_dos_drive_prefix(&pos) &&
2066 is_dir_sep(pos[0]) && is_dir_sep(pos[1])) {
2067 /* skip server name */
2068 pos = strpbrk(pos + 2, "\\/");
2069 if (!pos)
2070 return 0; /* Error: malformed unc path */
2071
2072 do {
2073 pos++;
2074 } while (*pos && !is_dir_sep(*pos));
2075 }
2076
2077 return pos + is_dir_sep(*pos) - path;
2078 }
2079
2080 int xutftowcsn(wchar_t *wcs, const char *utfs, size_t wcslen, int utflen)
2081 {
2082 int upos = 0, wpos = 0;
2083 const unsigned char *utf = (const unsigned char*) utfs;
2084 if (!utf || !wcs || wcslen < 1) {
2085 errno = EINVAL;
2086 return -1;
2087 }
2088 /* reserve space for \0 */
2089 wcslen--;
2090 if (utflen < 0)
2091 utflen = INT_MAX;
2092
2093 while (upos < utflen) {
2094 int c = utf[upos++] & 0xff;
2095 if (utflen == INT_MAX && c == 0)
2096 break;
2097
2098 if (wpos >= wcslen) {
2099 wcs[wpos] = 0;
2100 errno = ERANGE;
2101 return -1;
2102 }
2103
2104 if (c < 0x80) {
2105 /* ASCII */
2106 wcs[wpos++] = c;
2107 } else if (c >= 0xc2 && c < 0xe0 && upos < utflen &&
2108 (utf[upos] & 0xc0) == 0x80) {
2109 /* 2-byte utf-8 */
2110 c = ((c & 0x1f) << 6);
2111 c |= (utf[upos++] & 0x3f);
2112 wcs[wpos++] = c;
2113 } else if (c >= 0xe0 && c < 0xf0 && upos + 1 < utflen &&
2114 !(c == 0xe0 && utf[upos] < 0xa0) && /* over-long encoding */
2115 (utf[upos] & 0xc0) == 0x80 &&
2116 (utf[upos + 1] & 0xc0) == 0x80) {
2117 /* 3-byte utf-8 */
2118 c = ((c & 0x0f) << 12);
2119 c |= ((utf[upos++] & 0x3f) << 6);
2120 c |= (utf[upos++] & 0x3f);
2121 wcs[wpos++] = c;
2122 } else if (c >= 0xf0 && c < 0xf5 && upos + 2 < utflen &&
2123 wpos + 1 < wcslen &&
2124 !(c == 0xf0 && utf[upos] < 0x90) && /* over-long encoding */
2125 !(c == 0xf4 && utf[upos] >= 0x90) && /* > \u10ffff */
2126 (utf[upos] & 0xc0) == 0x80 &&
2127 (utf[upos + 1] & 0xc0) == 0x80 &&
2128 (utf[upos + 2] & 0xc0) == 0x80) {
2129 /* 4-byte utf-8: convert to \ud8xx \udcxx surrogate pair */
2130 c = ((c & 0x07) << 18);
2131 c |= ((utf[upos++] & 0x3f) << 12);
2132 c |= ((utf[upos++] & 0x3f) << 6);
2133 c |= (utf[upos++] & 0x3f);
2134 c -= 0x10000;
2135 wcs[wpos++] = 0xd800 | (c >> 10);
2136 wcs[wpos++] = 0xdc00 | (c & 0x3ff);
2137 } else if (c >= 0xa0) {
2138 /* invalid utf-8 byte, printable unicode char: convert 1:1 */
2139 wcs[wpos++] = c;
2140 } else {
2141 /* invalid utf-8 byte, non-printable unicode: convert to hex */
2142 static const char *hex = "0123456789abcdef";
2143 wcs[wpos++] = hex[c >> 4];
2144 if (wpos < wcslen)
2145 wcs[wpos++] = hex[c & 0x0f];
2146 }
2147 }
2148 wcs[wpos] = 0;
2149 return wpos;
2150 }
2151
2152 int xwcstoutf(char *utf, const wchar_t *wcs, size_t utflen)
2153 {
2154 if (!wcs || !utf || utflen < 1) {
2155 errno = EINVAL;
2156 return -1;
2157 }
2158 utflen = WideCharToMultiByte(CP_UTF8, 0, wcs, -1, utf, utflen, NULL, NULL);
2159 if (utflen)
2160 return utflen - 1;
2161 errno = ERANGE;
2162 return -1;
2163 }
2164
2165 static void setup_windows_environment()
2166 {
2167 char *tmp = getenv("TMPDIR");
2168
2169 /* on Windows it is TMP and TEMP */
2170 if (!tmp) {
2171 if (!(tmp = getenv("TMP")))
2172 tmp = getenv("TEMP");
2173 if (tmp) {
2174 setenv("TMPDIR", tmp, 1);
2175 tmp = getenv("TMPDIR");
2176 }
2177 }
2178
2179 if (tmp) {
2180 /*
2181 * Convert all dir separators to forward slashes,
2182 * to help shell commands called from the Git
2183 * executable (by not mistaking the dir separators
2184 * for escape characters).
2185 */
2186 convert_slashes(tmp);
2187 }
2188
2189 /* simulate TERM to enable auto-color (see color.c) */
2190 if (!getenv("TERM"))
2191 setenv("TERM", "cygwin", 1);
2192 }
2193
2194 /*
2195 * Disable MSVCRT command line wildcard expansion (__getmainargs called from
2196 * mingw startup code, see init.c in mingw runtime).
2197 */
2198 int _CRT_glob = 0;
2199
2200 typedef struct {
2201 int newmode;
2202 } _startupinfo;
2203
2204 extern int __wgetmainargs(int *argc, wchar_t ***argv, wchar_t ***env, int glob,
2205 _startupinfo *si);
2206
2207 static NORETURN void die_startup()
2208 {
2209 fputs("fatal: not enough memory for initialization", stderr);
2210 exit(128);
2211 }
2212
2213 static void *malloc_startup(size_t size)
2214 {
2215 void *result = malloc(size);
2216 if (!result)
2217 die_startup();
2218 return result;
2219 }
2220
2221 static char *wcstoutfdup_startup(char *buffer, const wchar_t *wcs, size_t len)
2222 {
2223 len = xwcstoutf(buffer, wcs, len) + 1;
2224 return memcpy(malloc_startup(len), buffer, len);
2225 }
2226
2227 void mingw_startup()
2228 {
2229 int i, maxlen, argc;
2230 char *buffer;
2231 wchar_t **wenv, **wargv;
2232 _startupinfo si;
2233
2234 /* get wide char arguments and environment */
2235 si.newmode = 0;
2236 if (__wgetmainargs(&argc, &wargv, &wenv, _CRT_glob, &si) < 0)
2237 die_startup();
2238
2239 /* determine size of argv and environ conversion buffer */
2240 maxlen = wcslen(_wpgmptr);
2241 for (i = 1; i < argc; i++)
2242 maxlen = max(maxlen, wcslen(wargv[i]));
2243 for (i = 0; wenv[i]; i++)
2244 maxlen = max(maxlen, wcslen(wenv[i]));
2245
2246 /*
2247 * nedmalloc can't free CRT memory, allocate resizable environment
2248 * list. Note that xmalloc / xmemdupz etc. call getenv, so we cannot
2249 * use it while initializing the environment itself.
2250 */
2251 environ_size = i + 1;
2252 environ_alloc = alloc_nr(environ_size * sizeof(char*));
2253 environ = malloc_startup(environ_alloc);
2254
2255 /* allocate buffer (wchar_t encodes to max 3 UTF-8 bytes) */
2256 maxlen = 3 * maxlen + 1;
2257 buffer = malloc_startup(maxlen);
2258
2259 /* convert command line arguments and environment to UTF-8 */
2260 __argv[0] = wcstoutfdup_startup(buffer, _wpgmptr, maxlen);
2261 for (i = 1; i < argc; i++)
2262 __argv[i] = wcstoutfdup_startup(buffer, wargv[i], maxlen);
2263 for (i = 0; wenv[i]; i++)
2264 environ[i] = wcstoutfdup_startup(buffer, wenv[i], maxlen);
2265 environ[i] = NULL;
2266 free(buffer);
2267
2268 /* sort environment for O(log n) getenv / putenv */
2269 qsort(environ, i, sizeof(char*), compareenv);
2270
2271 /* fix Windows specific environment settings */
2272 setup_windows_environment();
2273
2274 /* initialize critical section for waitpid pinfo_t list */
2275 InitializeCriticalSection(&pinfo_cs);
2276
2277 /* set up default file mode and file modes for stdin/out/err */
2278 _fmode = _O_BINARY;
2279 _setmode(_fileno(stdin), _O_BINARY);
2280 _setmode(_fileno(stdout), _O_BINARY);
2281 _setmode(_fileno(stderr), _O_BINARY);
2282
2283 /* initialize Unicode console */
2284 winansi_init();
2285 }
2286
2287 int uname(struct utsname *buf)
2288 {
2289 unsigned v = (unsigned)GetVersion();
2290 memset(buf, 0, sizeof(*buf));
2291 xsnprintf(buf->sysname, sizeof(buf->sysname), "Windows");
2292 xsnprintf(buf->release, sizeof(buf->release),
2293 "%u.%u", v & 0xff, (v >> 8) & 0xff);
2294 /* assuming NT variants only.. */
2295 xsnprintf(buf->version, sizeof(buf->version),
2296 "%u", (v >> 16) & 0x7fff);
2297 return 0;
2298 }
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