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[git/debian.git] / compat / mingw.c
blob5edea29508d06fdc2daea540edadffdebd54173e
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 static const int delay[] = { 0, 1, 10, 20, 40 };
10
11 int err_win_to_posix(DWORD winerr)
12 {
13 int error = ENOSYS;
14 switch(winerr) {
15 case ERROR_ACCESS_DENIED: error = EACCES; break;
16 case ERROR_ACCOUNT_DISABLED: error = EACCES; break;
17 case ERROR_ACCOUNT_RESTRICTION: error = EACCES; break;
18 case ERROR_ALREADY_ASSIGNED: error = EBUSY; break;
19 case ERROR_ALREADY_EXISTS: error = EEXIST; break;
20 case ERROR_ARITHMETIC_OVERFLOW: error = ERANGE; break;
21 case ERROR_BAD_COMMAND: error = EIO; break;
22 case ERROR_BAD_DEVICE: error = ENODEV; break;
23 case ERROR_BAD_DRIVER_LEVEL: error = ENXIO; break;
24 case ERROR_BAD_EXE_FORMAT: error = ENOEXEC; break;
25 case ERROR_BAD_FORMAT: error = ENOEXEC; break;
26 case ERROR_BAD_LENGTH: error = EINVAL; break;
27 case ERROR_BAD_PATHNAME: error = ENOENT; break;
28 case ERROR_BAD_PIPE: error = EPIPE; break;
29 case ERROR_BAD_UNIT: error = ENODEV; break;
30 case ERROR_BAD_USERNAME: error = EINVAL; break;
31 case ERROR_BROKEN_PIPE: error = EPIPE; break;
32 case ERROR_BUFFER_OVERFLOW: error = ENAMETOOLONG; break;
33 case ERROR_BUSY: error = EBUSY; break;
34 case ERROR_BUSY_DRIVE: error = EBUSY; break;
35 case ERROR_CALL_NOT_IMPLEMENTED: error = ENOSYS; break;
36 case ERROR_CANNOT_MAKE: error = EACCES; break;
37 case ERROR_CANTOPEN: error = EIO; break;
38 case ERROR_CANTREAD: error = EIO; break;
39 case ERROR_CANTWRITE: error = EIO; break;
40 case ERROR_CRC: error = EIO; break;
41 case ERROR_CURRENT_DIRECTORY: error = EACCES; break;
42 case ERROR_DEVICE_IN_USE: error = EBUSY; break;
43 case ERROR_DEV_NOT_EXIST: error = ENODEV; break;
44 case ERROR_DIRECTORY: error = EINVAL; break;
45 case ERROR_DIR_NOT_EMPTY: error = ENOTEMPTY; break;
46 case ERROR_DISK_CHANGE: error = EIO; break;
47 case ERROR_DISK_FULL: error = ENOSPC; break;
48 case ERROR_DRIVE_LOCKED: error = EBUSY; break;
49 case ERROR_ENVVAR_NOT_FOUND: error = EINVAL; break;
50 case ERROR_EXE_MARKED_INVALID: error = ENOEXEC; break;
51 case ERROR_FILENAME_EXCED_RANGE: error = ENAMETOOLONG; break;
52 case ERROR_FILE_EXISTS: error = EEXIST; break;
53 case ERROR_FILE_INVALID: error = ENODEV; break;
54 case ERROR_FILE_NOT_FOUND: error = ENOENT; break;
55 case ERROR_GEN_FAILURE: error = EIO; break;
56 case ERROR_HANDLE_DISK_FULL: error = ENOSPC; break;
57 case ERROR_INSUFFICIENT_BUFFER: error = ENOMEM; break;
58 case ERROR_INVALID_ACCESS: error = EACCES; break;
59 case ERROR_INVALID_ADDRESS: error = EFAULT; break;
60 case ERROR_INVALID_BLOCK: error = EFAULT; break;
61 case ERROR_INVALID_DATA: error = EINVAL; break;
62 case ERROR_INVALID_DRIVE: error = ENODEV; break;
63 case ERROR_INVALID_EXE_SIGNATURE: error = ENOEXEC; break;
64 case ERROR_INVALID_FLAGS: error = EINVAL; break;
65 case ERROR_INVALID_FUNCTION: error = ENOSYS; break;
66 case ERROR_INVALID_HANDLE: error = EBADF; break;
67 case ERROR_INVALID_LOGON_HOURS: error = EACCES; break;
68 case ERROR_INVALID_NAME: error = EINVAL; break;
69 case ERROR_INVALID_OWNER: error = EINVAL; break;
70 case ERROR_INVALID_PARAMETER: error = EINVAL; break;
71 case ERROR_INVALID_PASSWORD: error = EPERM; break;
72 case ERROR_INVALID_PRIMARY_GROUP: error = EINVAL; break;
73 case ERROR_INVALID_SIGNAL_NUMBER: error = EINVAL; break;
74 case ERROR_INVALID_TARGET_HANDLE: error = EIO; break;
75 case ERROR_INVALID_WORKSTATION: error = EACCES; break;
76 case ERROR_IO_DEVICE: error = EIO; break;
77 case ERROR_IO_INCOMPLETE: error = EINTR; break;
78 case ERROR_LOCKED: error = EBUSY; break;
79 case ERROR_LOCK_VIOLATION: error = EACCES; break;
80 case ERROR_LOGON_FAILURE: error = EACCES; break;
81 case ERROR_MAPPED_ALIGNMENT: error = EINVAL; break;
82 case ERROR_META_EXPANSION_TOO_LONG: error = E2BIG; break;
83 case ERROR_MORE_DATA: error = EPIPE; break;
84 case ERROR_NEGATIVE_SEEK: error = ESPIPE; break;
85 case ERROR_NOACCESS: error = EFAULT; break;
86 case ERROR_NONE_MAPPED: error = EINVAL; break;
87 case ERROR_NOT_ENOUGH_MEMORY: error = ENOMEM; break;
88 case ERROR_NOT_READY: error = EAGAIN; break;
89 case ERROR_NOT_SAME_DEVICE: error = EXDEV; break;
90 case ERROR_NO_DATA: error = EPIPE; break;
91 case ERROR_NO_MORE_SEARCH_HANDLES: error = EIO; break;
92 case ERROR_NO_PROC_SLOTS: error = EAGAIN; break;
93 case ERROR_NO_SUCH_PRIVILEGE: error = EACCES; break;
94 case ERROR_OPEN_FAILED: error = EIO; break;
95 case ERROR_OPEN_FILES: error = EBUSY; break;
96 case ERROR_OPERATION_ABORTED: error = EINTR; break;
97 case ERROR_OUTOFMEMORY: error = ENOMEM; break;
98 case ERROR_PASSWORD_EXPIRED: error = EACCES; break;
99 case ERROR_PATH_BUSY: error = EBUSY; break;
100 case ERROR_PATH_NOT_FOUND: error = ENOENT; break;
101 case ERROR_PIPE_BUSY: error = EBUSY; break;
102 case ERROR_PIPE_CONNECTED: error = EPIPE; break;
103 case ERROR_PIPE_LISTENING: error = EPIPE; break;
104 case ERROR_PIPE_NOT_CONNECTED: error = EPIPE; break;
105 case ERROR_PRIVILEGE_NOT_HELD: error = EACCES; break;
106 case ERROR_READ_FAULT: error = EIO; break;
107 case ERROR_SEEK: error = EIO; break;
108 case ERROR_SEEK_ON_DEVICE: error = ESPIPE; break;
109 case ERROR_SHARING_BUFFER_EXCEEDED: error = ENFILE; break;
110 case ERROR_SHARING_VIOLATION: error = EACCES; break;
111 case ERROR_STACK_OVERFLOW: error = ENOMEM; break;
112 case ERROR_SWAPERROR: error = ENOENT; break;
113 case ERROR_TOO_MANY_MODULES: error = EMFILE; break;
114 case ERROR_TOO_MANY_OPEN_FILES: error = EMFILE; break;
115 case ERROR_UNRECOGNIZED_MEDIA: error = ENXIO; break;
116 case ERROR_UNRECOGNIZED_VOLUME: error = ENODEV; break;
117 case ERROR_WAIT_NO_CHILDREN: error = ECHILD; break;
118 case ERROR_WRITE_FAULT: error = EIO; break;
119 case ERROR_WRITE_PROTECT: error = EROFS; break;
120 }
121 return error;
122 }
123
124 static inline int is_file_in_use_error(DWORD errcode)
125 {
126 switch (errcode) {
127 case ERROR_SHARING_VIOLATION:
128 case ERROR_ACCESS_DENIED:
129 return 1;
130 }
131
132 return 0;
133 }
134
135 static int read_yes_no_answer(void)
136 {
137 char answer[1024];
138
139 if (fgets(answer, sizeof(answer), stdin)) {
140 size_t answer_len = strlen(answer);
141 int got_full_line = 0, c;
142
143 /* remove the newline */
144 if (answer_len >= 2 && answer[answer_len-2] == '\r') {
145 answer[answer_len-2] = '\0';
146 got_full_line = 1;
147 } else if (answer_len >= 1 && answer[answer_len-1] == '\n') {
148 answer[answer_len-1] = '\0';
149 got_full_line = 1;
150 }
151 /* flush the buffer in case we did not get the full line */
152 if (!got_full_line)
153 while ((c = getchar()) != EOF && c != '\n')
154 ;
155 } else
156 /* we could not read, return the
157 * default answer which is no */
158 return 0;
159
160 if (tolower(answer[0]) == 'y' && !answer[1])
161 return 1;
162 if (!strncasecmp(answer, "yes", sizeof(answer)))
163 return 1;
164 if (tolower(answer[0]) == 'n' && !answer[1])
165 return 0;
166 if (!strncasecmp(answer, "no", sizeof(answer)))
167 return 0;
168
169 /* did not find an answer we understand */
170 return -1;
171 }
172
173 static int ask_yes_no_if_possible(const char *format, ...)
174 {
175 char question[4096];
176 const char *retry_hook[] = { NULL, NULL, NULL };
177 va_list args;
178
179 va_start(args, format);
180 vsnprintf(question, sizeof(question), format, args);
181 va_end(args);
182
183 if ((retry_hook[0] = mingw_getenv("GIT_ASK_YESNO"))) {
184 retry_hook[1] = question;
185 return !run_command_v_opt(retry_hook, 0);
186 }
187
188 if (!isatty(_fileno(stdin)) || !isatty(_fileno(stderr)))
189 return 0;
190
191 while (1) {
192 int answer;
193 fprintf(stderr, "%s (y/n) ", question);
194
195 if ((answer = read_yes_no_answer()) >= 0)
196 return answer;
197
198 fprintf(stderr, "Sorry, I did not understand your answer. "
199 "Please type 'y' or 'n'\n");
200 }
201 }
202
203 int mingw_unlink(const char *pathname)
204 {
205 int ret, tries = 0;
206 wchar_t wpathname[MAX_PATH];
207 if (xutftowcs_path(wpathname, pathname) < 0)
208 return -1;
209
210 /* read-only files cannot be removed */
211 _wchmod(wpathname, 0666);
212 while ((ret = _wunlink(wpathname)) == -1 && tries < ARRAY_SIZE(delay)) {
213 if (!is_file_in_use_error(GetLastError()))
214 break;
215 /*
216 * We assume that some other process had the source or
217 * destination file open at the wrong moment and retry.
218 * In order to give the other process a higher chance to
219 * complete its operation, we give up our time slice now.
220 * If we have to retry again, we do sleep a bit.
221 */
222 Sleep(delay[tries]);
223 tries++;
224 }
225 while (ret == -1 && is_file_in_use_error(GetLastError()) &&
226 ask_yes_no_if_possible("Unlink of file '%s' failed. "
227 "Should I try again?", pathname))
228 ret = _wunlink(wpathname);
229 return ret;
230 }
231
232 static int is_dir_empty(const wchar_t *wpath)
233 {
234 WIN32_FIND_DATAW findbuf;
235 HANDLE handle;
236 wchar_t wbuf[MAX_PATH + 2];
237 wcscpy(wbuf, wpath);
238 wcscat(wbuf, L"\\*");
239 handle = FindFirstFileW(wbuf, &findbuf);
240 if (handle == INVALID_HANDLE_VALUE)
241 return GetLastError() == ERROR_NO_MORE_FILES;
242
243 while (!wcscmp(findbuf.cFileName, L".") ||
244 !wcscmp(findbuf.cFileName, L".."))
245 if (!FindNextFileW(handle, &findbuf)) {
246 DWORD err = GetLastError();
247 FindClose(handle);
248 return err == ERROR_NO_MORE_FILES;
249 }
250 FindClose(handle);
251 return 0;
252 }
253
254 int mingw_rmdir(const char *pathname)
255 {
256 int ret, tries = 0;
257 wchar_t wpathname[MAX_PATH];
258 if (xutftowcs_path(wpathname, pathname) < 0)
259 return -1;
260
261 while ((ret = _wrmdir(wpathname)) == -1 && tries < ARRAY_SIZE(delay)) {
262 if (!is_file_in_use_error(GetLastError()))
263 errno = err_win_to_posix(GetLastError());
264 if (errno != EACCES)
265 break;
266 if (!is_dir_empty(wpathname)) {
267 errno = ENOTEMPTY;
268 break;
269 }
270 /*
271 * We assume that some other process had the source or
272 * destination file open at the wrong moment and retry.
273 * In order to give the other process a higher chance to
274 * complete its operation, we give up our time slice now.
275 * If we have to retry again, we do sleep a bit.
276 */
277 Sleep(delay[tries]);
278 tries++;
279 }
280 while (ret == -1 && errno == EACCES && is_file_in_use_error(GetLastError()) &&
281 ask_yes_no_if_possible("Deletion of directory '%s' failed. "
282 "Should I try again?", pathname))
283 ret = _wrmdir(wpathname);
284 return ret;
285 }
286
287 int mingw_mkdir(const char *path, int mode)
288 {
289 int ret;
290 wchar_t wpath[MAX_PATH];
291 if (xutftowcs_path(wpath, path) < 0)
292 return -1;
293 ret = _wmkdir(wpath);
294 return ret;
295 }
296
297 int mingw_open (const char *filename, int oflags, ...)
298 {
299 va_list args;
300 unsigned mode;
301 int fd;
302 wchar_t wfilename[MAX_PATH];
303
304 va_start(args, oflags);
305 mode = va_arg(args, int);
306 va_end(args);
307
308 if (filename && !strcmp(filename, "/dev/null"))
309 filename = "nul";
310
311 if (xutftowcs_path(wfilename, filename) < 0)
312 return -1;
313 fd = _wopen(wfilename, oflags, mode);
314
315 if (fd < 0 && (oflags & O_ACCMODE) != O_RDONLY && errno == EACCES) {
316 DWORD attrs = GetFileAttributesW(wfilename);
317 if (attrs != INVALID_FILE_ATTRIBUTES && (attrs & FILE_ATTRIBUTE_DIRECTORY))
318 errno = EISDIR;
319 }
320 return fd;
321 }
322
323 static BOOL WINAPI ctrl_ignore(DWORD type)
324 {
325 return TRUE;
326 }
327
328 #undef fgetc
329 int mingw_fgetc(FILE *stream)
330 {
331 int ch;
332 if (!isatty(_fileno(stream)))
333 return fgetc(stream);
334
335 SetConsoleCtrlHandler(ctrl_ignore, TRUE);
336 while (1) {
337 ch = fgetc(stream);
338 if (ch != EOF || GetLastError() != ERROR_OPERATION_ABORTED)
339 break;
340
341 /* Ctrl+C was pressed, simulate SIGINT and retry */
342 mingw_raise(SIGINT);
343 }
344 SetConsoleCtrlHandler(ctrl_ignore, FALSE);
345 return ch;
346 }
347
348 #undef fopen
349 FILE *mingw_fopen (const char *filename, const char *otype)
350 {
351 FILE *file;
352 wchar_t wfilename[MAX_PATH], wotype[4];
353 if (filename && !strcmp(filename, "/dev/null"))
354 filename = "nul";
355 if (xutftowcs_path(wfilename, filename) < 0 ||
356 xutftowcs(wotype, otype, ARRAY_SIZE(wotype)) < 0)
357 return NULL;
358 file = _wfopen(wfilename, wotype);
359 return file;
360 }
361
362 FILE *mingw_freopen (const char *filename, const char *otype, FILE *stream)
363 {
364 FILE *file;
365 wchar_t wfilename[MAX_PATH], wotype[4];
366 if (filename && !strcmp(filename, "/dev/null"))
367 filename = "nul";
368 if (xutftowcs_path(wfilename, filename) < 0 ||
369 xutftowcs(wotype, otype, ARRAY_SIZE(wotype)) < 0)
370 return NULL;
371 file = _wfreopen(wfilename, wotype, stream);
372 return file;
373 }
374
375 #undef fflush
376 int mingw_fflush(FILE *stream)
377 {
378 int ret = fflush(stream);
379
380 /*
381 * write() is used behind the scenes of stdio output functions.
382 * Since git code does not check for errors after each stdio write
383 * operation, it can happen that write() is called by a later
384 * stdio function even if an earlier write() call failed. In the
385 * case of a pipe whose readable end was closed, only the first
386 * call to write() reports EPIPE on Windows. Subsequent write()
387 * calls report EINVAL. It is impossible to notice whether this
388 * fflush invocation triggered such a case, therefore, we have to
389 * catch all EINVAL errors whole-sale.
390 */
391 if (ret && errno == EINVAL)
392 errno = EPIPE;
393
394 return ret;
395 }
396
397 #undef write
398 ssize_t mingw_write(int fd, const void *buf, size_t len)
399 {
400 ssize_t result = write(fd, buf, len);
401
402 if (result < 0 && errno == EINVAL && buf) {
403 /* check if fd is a pipe */
404 HANDLE h = (HANDLE) _get_osfhandle(fd);
405 if (GetFileType(h) == FILE_TYPE_PIPE)
406 errno = EPIPE;
407 else
408 errno = EINVAL;
409 }
410
411 return result;
412 }
413
414 int mingw_access(const char *filename, int mode)
415 {
416 wchar_t wfilename[MAX_PATH];
417 if (xutftowcs_path(wfilename, filename) < 0)
418 return -1;
419 /* X_OK is not supported by the MSVCRT version */
420 return _waccess(wfilename, mode & ~X_OK);
421 }
422
423 int mingw_chdir(const char *dirname)
424 {
425 wchar_t wdirname[MAX_PATH];
426 if (xutftowcs_path(wdirname, dirname) < 0)
427 return -1;
428 return _wchdir(wdirname);
429 }
430
431 int mingw_chmod(const char *filename, int mode)
432 {
433 wchar_t wfilename[MAX_PATH];
434 if (xutftowcs_path(wfilename, filename) < 0)
435 return -1;
436 return _wchmod(wfilename, mode);
437 }
438
439 /*
440 * The unit of FILETIME is 100-nanoseconds since January 1, 1601, UTC.
441 * Returns the 100-nanoseconds ("hekto nanoseconds") since the epoch.
442 */
443 static inline long long filetime_to_hnsec(const FILETIME *ft)
444 {
445 long long winTime = ((long long)ft->dwHighDateTime << 32) + ft->dwLowDateTime;
446 /* Windows to Unix Epoch conversion */
447 return winTime - 116444736000000000LL;
448 }
449
450 static inline time_t filetime_to_time_t(const FILETIME *ft)
451 {
452 return (time_t)(filetime_to_hnsec(ft) / 10000000);
453 }
454
455 /* We keep the do_lstat code in a separate function to avoid recursion.
456 * When a path ends with a slash, the stat will fail with ENOENT. In
457 * this case, we strip the trailing slashes and stat again.
458 *
459 * If follow is true then act like stat() and report on the link
460 * target. Otherwise report on the link itself.
461 */
462 static int do_lstat(int follow, const char *file_name, struct stat *buf)
463 {
464 WIN32_FILE_ATTRIBUTE_DATA fdata;
465 wchar_t wfilename[MAX_PATH];
466 if (xutftowcs_path(wfilename, file_name) < 0)
467 return -1;
468
469 if (GetFileAttributesExW(wfilename, GetFileExInfoStandard, &fdata)) {
470 buf->st_ino = 0;
471 buf->st_gid = 0;
472 buf->st_uid = 0;
473 buf->st_nlink = 1;
474 buf->st_mode = file_attr_to_st_mode(fdata.dwFileAttributes);
475 buf->st_size = fdata.nFileSizeLow |
476 (((off_t)fdata.nFileSizeHigh)<<32);
477 buf->st_dev = buf->st_rdev = 0; /* not used by Git */
478 buf->st_atime = filetime_to_time_t(&(fdata.ftLastAccessTime));
479 buf->st_mtime = filetime_to_time_t(&(fdata.ftLastWriteTime));
480 buf->st_ctime = filetime_to_time_t(&(fdata.ftCreationTime));
481 if (fdata.dwFileAttributes & FILE_ATTRIBUTE_REPARSE_POINT) {
482 WIN32_FIND_DATAW findbuf;
483 HANDLE handle = FindFirstFileW(wfilename, &findbuf);
484 if (handle != INVALID_HANDLE_VALUE) {
485 if ((findbuf.dwFileAttributes & FILE_ATTRIBUTE_REPARSE_POINT) &&
486 (findbuf.dwReserved0 == IO_REPARSE_TAG_SYMLINK)) {
487 if (follow) {
488 char buffer[MAXIMUM_REPARSE_DATA_BUFFER_SIZE];
489 buf->st_size = readlink(file_name, buffer, MAXIMUM_REPARSE_DATA_BUFFER_SIZE);
490 } else {
491 buf->st_mode = S_IFLNK;
492 }
493 buf->st_mode |= S_IREAD;
494 if (!(findbuf.dwFileAttributes & FILE_ATTRIBUTE_READONLY))
495 buf->st_mode |= S_IWRITE;
496 }
497 FindClose(handle);
498 }
499 }
500 return 0;
501 }
502 switch (GetLastError()) {
503 case ERROR_ACCESS_DENIED:
504 case ERROR_SHARING_VIOLATION:
505 case ERROR_LOCK_VIOLATION:
506 case ERROR_SHARING_BUFFER_EXCEEDED:
507 errno = EACCES;
508 break;
509 case ERROR_BUFFER_OVERFLOW:
510 errno = ENAMETOOLONG;
511 break;
512 case ERROR_NOT_ENOUGH_MEMORY:
513 errno = ENOMEM;
514 break;
515 default:
516 errno = ENOENT;
517 break;
518 }
519 return -1;
520 }
521
522 /* We provide our own lstat/fstat functions, since the provided
523 * lstat/fstat functions are so slow. These stat functions are
524 * tailored for Git's usage (read: fast), and are not meant to be
525 * complete. Note that Git stat()s are redirected to mingw_lstat()
526 * too, since Windows doesn't really handle symlinks that well.
527 */
528 static int do_stat_internal(int follow, const char *file_name, struct stat *buf)
529 {
530 int namelen;
531 char alt_name[PATH_MAX];
532
533 if (!do_lstat(follow, file_name, buf))
534 return 0;
535
536 /* if file_name ended in a '/', Windows returned ENOENT;
537 * try again without trailing slashes
538 */
539 if (errno != ENOENT)
540 return -1;
541
542 namelen = strlen(file_name);
543 if (namelen && file_name[namelen-1] != '/')
544 return -1;
545 while (namelen && file_name[namelen-1] == '/')
546 --namelen;
547 if (!namelen || namelen >= PATH_MAX)
548 return -1;
549
550 memcpy(alt_name, file_name, namelen);
551 alt_name[namelen] = 0;
552 return do_lstat(follow, alt_name, buf);
553 }
554
555 int mingw_lstat(const char *file_name, struct stat *buf)
556 {
557 return do_stat_internal(0, file_name, buf);
558 }
559 int mingw_stat(const char *file_name, struct stat *buf)
560 {
561 return do_stat_internal(1, file_name, buf);
562 }
563
564 int mingw_fstat(int fd, struct stat *buf)
565 {
566 HANDLE fh = (HANDLE)_get_osfhandle(fd);
567 BY_HANDLE_FILE_INFORMATION fdata;
568
569 if (fh == INVALID_HANDLE_VALUE) {
570 errno = EBADF;
571 return -1;
572 }
573 /* direct non-file handles to MS's fstat() */
574 if (GetFileType(fh) != FILE_TYPE_DISK)
575 return _fstati64(fd, buf);
576
577 if (GetFileInformationByHandle(fh, &fdata)) {
578 buf->st_ino = 0;
579 buf->st_gid = 0;
580 buf->st_uid = 0;
581 buf->st_nlink = 1;
582 buf->st_mode = file_attr_to_st_mode(fdata.dwFileAttributes);
583 buf->st_size = fdata.nFileSizeLow |
584 (((off_t)fdata.nFileSizeHigh)<<32);
585 buf->st_dev = buf->st_rdev = 0; /* not used by Git */
586 buf->st_atime = filetime_to_time_t(&(fdata.ftLastAccessTime));
587 buf->st_mtime = filetime_to_time_t(&(fdata.ftLastWriteTime));
588 buf->st_ctime = filetime_to_time_t(&(fdata.ftCreationTime));
589 return 0;
590 }
591 errno = EBADF;
592 return -1;
593 }
594
595 static inline void time_t_to_filetime(time_t t, FILETIME *ft)
596 {
597 long long winTime = t * 10000000LL + 116444736000000000LL;
598 ft->dwLowDateTime = winTime;
599 ft->dwHighDateTime = winTime >> 32;
600 }
601
602 int mingw_utime (const char *file_name, const struct utimbuf *times)
603 {
604 FILETIME mft, aft;
605 int fh, rc;
606 DWORD attrs;
607 wchar_t wfilename[MAX_PATH];
608 if (xutftowcs_path(wfilename, file_name) < 0)
609 return -1;
610
611 /* must have write permission */
612 attrs = GetFileAttributesW(wfilename);
613 if (attrs != INVALID_FILE_ATTRIBUTES &&
614 (attrs & FILE_ATTRIBUTE_READONLY)) {
615 /* ignore errors here; open() will report them */
616 SetFileAttributesW(wfilename, attrs & ~FILE_ATTRIBUTE_READONLY);
617 }
618
619 if ((fh = _wopen(wfilename, O_RDWR | O_BINARY)) < 0) {
620 rc = -1;
621 goto revert_attrs;
622 }
623
624 if (times) {
625 time_t_to_filetime(times->modtime, &mft);
626 time_t_to_filetime(times->actime, &aft);
627 } else {
628 GetSystemTimeAsFileTime(&mft);
629 aft = mft;
630 }
631 if (!SetFileTime((HANDLE)_get_osfhandle(fh), NULL, &aft, &mft)) {
632 errno = EINVAL;
633 rc = -1;
634 } else
635 rc = 0;
636 close(fh);
637
638 revert_attrs:
639 if (attrs != INVALID_FILE_ATTRIBUTES &&
640 (attrs & FILE_ATTRIBUTE_READONLY)) {
641 /* ignore errors again */
642 SetFileAttributesW(wfilename, attrs);
643 }
644 return rc;
645 }
646
647 unsigned int sleep (unsigned int seconds)
648 {
649 Sleep(seconds*1000);
650 return 0;
651 }
652
653 char *mingw_mktemp(char *template)
654 {
655 wchar_t wtemplate[MAX_PATH];
656 if (xutftowcs_path(wtemplate, template) < 0)
657 return NULL;
658 if (!_wmktemp(wtemplate))
659 return NULL;
660 if (xwcstoutf(template, wtemplate, strlen(template) + 1) < 0)
661 return NULL;
662 return template;
663 }
664
665 int mkstemp(char *template)
666 {
667 char *filename = mktemp(template);
668 if (filename == NULL)
669 return -1;
670 return open(filename, O_RDWR | O_CREAT, 0600);
671 }
672
673 int gettimeofday(struct timeval *tv, void *tz)
674 {
675 FILETIME ft;
676 long long hnsec;
677
678 GetSystemTimeAsFileTime(&ft);
679 hnsec = filetime_to_hnsec(&ft);
680 tv->tv_sec = hnsec / 10000000;
681 tv->tv_usec = (hnsec % 10000000) / 10;
682 return 0;
683 }
684
685 int pipe(int filedes[2])
686 {
687 HANDLE h[2];
688
689 /* this creates non-inheritable handles */
690 if (!CreatePipe(&h[0], &h[1], NULL, 8192)) {
691 errno = err_win_to_posix(GetLastError());
692 return -1;
693 }
694 filedes[0] = _open_osfhandle((int)h[0], O_NOINHERIT);
695 if (filedes[0] < 0) {
696 CloseHandle(h[0]);
697 CloseHandle(h[1]);
698 return -1;
699 }
700 filedes[1] = _open_osfhandle((int)h[1], O_NOINHERIT);
701 if (filedes[1] < 0) {
702 close(filedes[0]);
703 CloseHandle(h[1]);
704 return -1;
705 }
706 return 0;
707 }
708
709 struct tm *gmtime_r(const time_t *timep, struct tm *result)
710 {
711 /* gmtime() in MSVCRT.DLL is thread-safe, but not reentrant */
712 memcpy(result, gmtime(timep), sizeof(struct tm));
713 return result;
714 }
715
716 struct tm *localtime_r(const time_t *timep, struct tm *result)
717 {
718 /* localtime() in MSVCRT.DLL is thread-safe, but not reentrant */
719 memcpy(result, localtime(timep), sizeof(struct tm));
720 return result;
721 }
722
723 char *mingw_getcwd(char *pointer, int len)
724 {
725 int i;
726 wchar_t wpointer[MAX_PATH];
727 if (!_wgetcwd(wpointer, ARRAY_SIZE(wpointer)))
728 return NULL;
729 if (xwcstoutf(pointer, wpointer, len) < 0)
730 return NULL;
731 for (i = 0; pointer[i]; i++)
732 if (pointer[i] == '\\')
733 pointer[i] = '/';
734 return pointer;
735 }
736
737 /*
738 * See http://msdn2.microsoft.com/en-us/library/17w5ykft(vs.71).aspx
739 * (Parsing C++ Command-Line Arguments)
740 */
741 static const char *quote_arg(const char *arg)
742 {
743 /* count chars to quote */
744 int len = 0, n = 0;
745 int force_quotes = 0;
746 char *q, *d;
747 const char *p = arg;
748 if (!*p) force_quotes = 1;
749 while (*p) {
750 if (isspace(*p) || *p == '*' || *p == '?' || *p == '{' || *p == '\'')
751 force_quotes = 1;
752 else if (*p == '"')
753 n++;
754 else if (*p == '\\') {
755 int count = 0;
756 while (*p == '\\') {
757 count++;
758 p++;
759 len++;
760 }
761 if (*p == '"')
762 n += count*2 + 1;
763 continue;
764 }
765 len++;
766 p++;
767 }
768 if (!force_quotes && n == 0)
769 return arg;
770
771 /* insert \ where necessary */
772 d = q = xmalloc(len+n+3);
773 *d++ = '"';
774 while (*arg) {
775 if (*arg == '"')
776 *d++ = '\\';
777 else if (*arg == '\\') {
778 int count = 0;
779 while (*arg == '\\') {
780 count++;
781 *d++ = *arg++;
782 }
783 if (*arg == '"') {
784 while (count-- > 0)
785 *d++ = '\\';
786 *d++ = '\\';
787 }
788 }
789 *d++ = *arg++;
790 }
791 *d++ = '"';
792 *d++ = 0;
793 return q;
794 }
795
796 static const char *parse_interpreter(const char *cmd)
797 {
798 static char buf[100];
799 char *p, *opt;
800 int n, fd;
801
802 /* don't even try a .exe */
803 n = strlen(cmd);
804 if (n >= 4 && !strcasecmp(cmd+n-4, ".exe"))
805 return NULL;
806
807 fd = open(cmd, O_RDONLY);
808 if (fd < 0)
809 return NULL;
810 n = read(fd, buf, sizeof(buf)-1);
811 close(fd);
812 if (n < 4) /* at least '#!/x' and not error */
813 return NULL;
814
815 if (buf[0] != '#' || buf[1] != '!')
816 return NULL;
817 buf[n] = '\0';
818 p = buf + strcspn(buf, "\r\n");
819 if (!*p)
820 return NULL;
821
822 *p = '\0';
823 if (!(p = strrchr(buf+2, '/')) && !(p = strrchr(buf+2, '\\')))
824 return NULL;
825 /* strip options */
826 if ((opt = strchr(p+1, ' ')))
827 *opt = '\0';
828 return p+1;
829 }
830
831 /*
832 * Splits the PATH into parts.
833 */
834 static char **get_path_split(void)
835 {
836 char *p, **path, *envpath = mingw_getenv("PATH");
837 int i, n = 0;
838
839 if (!envpath || !*envpath)
840 return NULL;
841
842 envpath = xstrdup(envpath);
843 p = envpath;
844 while (p) {
845 char *dir = p;
846 p = strchr(p, ';');
847 if (p) *p++ = '\0';
848 if (*dir) { /* not earlier, catches series of ; */
849 ++n;
850 }
851 }
852 if (!n)
853 return NULL;
854
855 path = xmalloc((n+1)*sizeof(char *));
856 p = envpath;
857 i = 0;
858 do {
859 if (*p)
860 path[i++] = xstrdup(p);
861 p = p+strlen(p)+1;
862 } while (i < n);
863 path[i] = NULL;
864
865 free(envpath);
866
867 return path;
868 }
869
870 static void free_path_split(char **path)
871 {
872 char **p = path;
873
874 if (!path)
875 return;
876
877 while (*p)
878 free(*p++);
879 free(path);
880 }
881
882 /*
883 * exe_only means that we only want to detect .exe files, but not scripts
884 * (which do not have an extension)
885 */
886 static char *lookup_prog(const char *dir, const char *cmd, int isexe, int exe_only)
887 {
888 char path[MAX_PATH];
889 snprintf(path, sizeof(path), "%s/%s.exe", dir, cmd);
890
891 if (!isexe && access(path, F_OK) == 0)
892 return xstrdup(path);
893 path[strlen(path)-4] = '\0';
894 if ((!exe_only || isexe) && access(path, F_OK) == 0)
895 if (!(GetFileAttributes(path) & FILE_ATTRIBUTE_DIRECTORY))
896 return xstrdup(path);
897 return NULL;
898 }
899
900 /*
901 * Determines the absolute path of cmd using the split path in path.
902 * If cmd contains a slash or backslash, no lookup is performed.
903 */
904 static char *path_lookup(const char *cmd, char **path, int exe_only)
905 {
906 char *prog = NULL;
907 int len = strlen(cmd);
908 int isexe = len >= 4 && !strcasecmp(cmd+len-4, ".exe");
909
910 if (strchr(cmd, '/') || strchr(cmd, '\\'))
911 prog = xstrdup(cmd);
912
913 while (!prog && *path)
914 prog = lookup_prog(*path++, cmd, isexe, exe_only);
915
916 return prog;
917 }
918
919 static int do_putenv(char **env, const char *name, int size, int free_old);
920
921 /* used number of elements of environ array, including terminating NULL */
922 static int environ_size = 0;
923 /* allocated size of environ array, in bytes */
924 static int environ_alloc = 0;
925
926 /*
927 * Create environment block suitable for CreateProcess. Merges current
928 * process environment and the supplied environment changes.
929 */
930 static wchar_t *make_environment_block(char **deltaenv)
931 {
932 wchar_t *wenvblk = NULL;
933 char **tmpenv;
934 int i = 0, size = environ_size, wenvsz = 0, wenvpos = 0;
935
936 while (deltaenv && deltaenv[i])
937 i++;
938
939 /* copy the environment, leaving space for changes */
940 tmpenv = xmalloc((size + i) * sizeof(char*));
941 memcpy(tmpenv, environ, size * sizeof(char*));
942
943 /* merge supplied environment changes into the temporary environment */
944 for (i = 0; deltaenv && deltaenv[i]; i++)
945 size = do_putenv(tmpenv, deltaenv[i], size, 0);
946
947 /* create environment block from temporary environment */
948 for (i = 0; tmpenv[i]; i++) {
949 size = 2 * strlen(tmpenv[i]) + 2; /* +2 for final \0 */
950 ALLOC_GROW(wenvblk, (wenvpos + size) * sizeof(wchar_t), wenvsz);
951 wenvpos += xutftowcs(&wenvblk[wenvpos], tmpenv[i], size) + 1;
952 }
953 /* add final \0 terminator */
954 wenvblk[wenvpos] = 0;
955 free(tmpenv);
956 return wenvblk;
957 }
958
959 struct pinfo_t {
960 struct pinfo_t *next;
961 pid_t pid;
962 HANDLE proc;
963 };
964 static struct pinfo_t *pinfo = NULL;
965 CRITICAL_SECTION pinfo_cs;
966
967 static pid_t mingw_spawnve_fd(const char *cmd, const char **argv, char **deltaenv,
968 const char *dir,
969 int prepend_cmd, int fhin, int fhout, int fherr)
970 {
971 STARTUPINFOW si;
972 PROCESS_INFORMATION pi;
973 struct strbuf args;
974 wchar_t wcmd[MAX_PATH], wdir[MAX_PATH], *wargs, *wenvblk = NULL;
975 unsigned flags = CREATE_UNICODE_ENVIRONMENT;
976 BOOL ret;
977
978 /* Determine whether or not we are associated to a console */
979 HANDLE cons = CreateFile("CONOUT$", GENERIC_WRITE,
980 FILE_SHARE_WRITE, NULL, OPEN_EXISTING,
981 FILE_ATTRIBUTE_NORMAL, NULL);
982 if (cons == INVALID_HANDLE_VALUE) {
983 /* There is no console associated with this process.
984 * Since the child is a console process, Windows
985 * would normally create a console window. But
986 * since we'll be redirecting std streams, we do
987 * not need the console.
988 * It is necessary to use DETACHED_PROCESS
989 * instead of CREATE_NO_WINDOW to make ssh
990 * recognize that it has no console.
991 */
992 flags |= DETACHED_PROCESS;
993 } else {
994 /* There is already a console. If we specified
995 * DETACHED_PROCESS here, too, Windows would
996 * disassociate the child from the console.
997 * The same is true for CREATE_NO_WINDOW.
998 * Go figure!
999 */
1000 CloseHandle(cons);
1001 }
1002 memset(&si, 0, sizeof(si));
1003 si.cb = sizeof(si);
1004 si.dwFlags = STARTF_USESTDHANDLES;
1005 si.hStdInput = winansi_get_osfhandle(fhin);
1006 si.hStdOutput = winansi_get_osfhandle(fhout);
1007 si.hStdError = winansi_get_osfhandle(fherr);
1008
1009 if (xutftowcs_path(wcmd, cmd) < 0)
1010 return -1;
1011 if (dir && xutftowcs_path(wdir, dir) < 0)
1012 return -1;
1013
1014 /* concatenate argv, quoting args as we go */
1015 strbuf_init(&args, 0);
1016 if (prepend_cmd) {
1017 char *quoted = (char *)quote_arg(cmd);
1018 strbuf_addstr(&args, quoted);
1019 if (quoted != cmd)
1020 free(quoted);
1021 }
1022 for (; *argv; argv++) {
1023 char *quoted = (char *)quote_arg(*argv);
1024 if (*args.buf)
1025 strbuf_addch(&args, ' ');
1026 strbuf_addstr(&args, quoted);
1027 if (quoted != *argv)
1028 free(quoted);
1029 }
1030
1031 wargs = xmalloc((2 * args.len + 1) * sizeof(wchar_t));
1032 xutftowcs(wargs, args.buf, 2 * args.len + 1);
1033 strbuf_release(&args);
1034
1035 wenvblk = make_environment_block(deltaenv);
1036
1037 memset(&pi, 0, sizeof(pi));
1038 ret = CreateProcessW(wcmd, wargs, NULL, NULL, TRUE, flags,
1039 wenvblk, dir ? wdir : NULL, &si, &pi);
1040
1041 free(wenvblk);
1042 free(wargs);
1043
1044 if (!ret) {
1045 errno = ENOENT;
1046 return -1;
1047 }
1048 CloseHandle(pi.hThread);
1049
1050 /*
1051 * The process ID is the human-readable identifier of the process
1052 * that we want to present in log and error messages. The handle
1053 * is not useful for this purpose. But we cannot close it, either,
1054 * because it is not possible to turn a process ID into a process
1055 * handle after the process terminated.
1056 * Keep the handle in a list for waitpid.
1057 */
1058 EnterCriticalSection(&pinfo_cs);
1059 {
1060 struct pinfo_t *info = xmalloc(sizeof(struct pinfo_t));
1061 info->pid = pi.dwProcessId;
1062 info->proc = pi.hProcess;
1063 info->next = pinfo;
1064 pinfo = info;
1065 }
1066 LeaveCriticalSection(&pinfo_cs);
1067
1068 return (pid_t)pi.dwProcessId;
1069 }
1070
1071 static pid_t mingw_spawnv(const char *cmd, const char **argv, int prepend_cmd)
1072 {
1073 return mingw_spawnve_fd(cmd, argv, NULL, NULL, prepend_cmd, 0, 1, 2);
1074 }
1075
1076 pid_t mingw_spawnvpe(const char *cmd, const char **argv, char **deltaenv,
1077 const char *dir,
1078 int fhin, int fhout, int fherr)
1079 {
1080 pid_t pid;
1081 char **path = get_path_split();
1082 char *prog = path_lookup(cmd, path, 0);
1083
1084 if (!prog) {
1085 errno = ENOENT;
1086 pid = -1;
1087 }
1088 else {
1089 const char *interpr = parse_interpreter(prog);
1090
1091 if (interpr) {
1092 const char *argv0 = argv[0];
1093 char *iprog = path_lookup(interpr, path, 1);
1094 argv[0] = prog;
1095 if (!iprog) {
1096 errno = ENOENT;
1097 pid = -1;
1098 }
1099 else {
1100 pid = mingw_spawnve_fd(iprog, argv, deltaenv, dir, 1,
1101 fhin, fhout, fherr);
1102 free(iprog);
1103 }
1104 argv[0] = argv0;
1105 }
1106 else
1107 pid = mingw_spawnve_fd(prog, argv, deltaenv, dir, 0,
1108 fhin, fhout, fherr);
1109 free(prog);
1110 }
1111 free_path_split(path);
1112 return pid;
1113 }
1114
1115 static int try_shell_exec(const char *cmd, char *const *argv)
1116 {
1117 const char *interpr = parse_interpreter(cmd);
1118 char **path;
1119 char *prog;
1120 int pid = 0;
1121
1122 if (!interpr)
1123 return 0;
1124 path = get_path_split();
1125 prog = path_lookup(interpr, path, 1);
1126 if (prog) {
1127 int argc = 0;
1128 const char **argv2;
1129 while (argv[argc]) argc++;
1130 argv2 = xmalloc(sizeof(*argv) * (argc+1));
1131 argv2[0] = (char *)cmd; /* full path to the script file */
1132 memcpy(&argv2[1], &argv[1], sizeof(*argv) * argc);
1133 pid = mingw_spawnv(prog, argv2, 1);
1134 if (pid >= 0) {
1135 int status;
1136 if (waitpid(pid, &status, 0) < 0)
1137 status = 255;
1138 exit(status);
1139 }
1140 pid = 1; /* indicate that we tried but failed */
1141 free(prog);
1142 free(argv2);
1143 }
1144 free_path_split(path);
1145 return pid;
1146 }
1147
1148 int mingw_execv(const char *cmd, char *const *argv)
1149 {
1150 /* check if git_command is a shell script */
1151 if (!try_shell_exec(cmd, argv)) {
1152 int pid, status;
1153
1154 pid = mingw_spawnv(cmd, (const char **)argv, 0);
1155 if (pid < 0)
1156 return -1;
1157 if (waitpid(pid, &status, 0) < 0)
1158 status = 255;
1159 exit(status);
1160 }
1161 return -1;
1162 }
1163
1164 int mingw_execvp(const char *cmd, char *const *argv)
1165 {
1166 char **path = get_path_split();
1167 char *prog = path_lookup(cmd, path, 0);
1168
1169 if (prog) {
1170 mingw_execv(prog, argv);
1171 free(prog);
1172 } else
1173 errno = ENOENT;
1174
1175 free_path_split(path);
1176 return -1;
1177 }
1178
1179 int mingw_kill(pid_t pid, int sig)
1180 {
1181 if (pid > 0 && sig == SIGTERM) {
1182 HANDLE h = OpenProcess(PROCESS_TERMINATE, FALSE, pid);
1183
1184 if (TerminateProcess(h, -1)) {
1185 CloseHandle(h);
1186 return 0;
1187 }
1188
1189 errno = err_win_to_posix(GetLastError());
1190 CloseHandle(h);
1191 return -1;
1192 } else if (pid > 0 && sig == 0) {
1193 HANDLE h = OpenProcess(PROCESS_QUERY_INFORMATION, FALSE, pid);
1194 if (h) {
1195 CloseHandle(h);
1196 return 0;
1197 }
1198 }
1199
1200 errno = EINVAL;
1201 return -1;
1202 }
1203
1204 /*
1205 * Compare environment entries by key (i.e. stopping at '=' or '\0').
1206 */
1207 static int compareenv(const void *v1, const void *v2)
1208 {
1209 const char *e1 = *(const char**)v1;
1210 const char *e2 = *(const char**)v2;
1211
1212 for (;;) {
1213 int c1 = *e1++;
1214 int c2 = *e2++;
1215 c1 = (c1 == '=') ? 0 : tolower(c1);
1216 c2 = (c2 == '=') ? 0 : tolower(c2);
1217 if (c1 > c2)
1218 return 1;
1219 if (c1 < c2)
1220 return -1;
1221 if (c1 == 0)
1222 return 0;
1223 }
1224 }
1225
1226 static int bsearchenv(char **env, const char *name, size_t size)
1227 {
1228 unsigned low = 0, high = size;
1229 while (low < high) {
1230 unsigned mid = low + ((high - low) >> 1);
1231 int cmp = compareenv(&env[mid], &name);
1232 if (cmp < 0)
1233 low = mid + 1;
1234 else if (cmp > 0)
1235 high = mid;
1236 else
1237 return mid;
1238 }
1239 return ~low; /* not found, return 1's complement of insert position */
1240 }
1241
1242 /*
1243 * If name contains '=', then sets the variable, otherwise it unsets it
1244 * Size includes the terminating NULL. Env must have room for size + 1 entries
1245 * (in case of insert). Returns the new size. Optionally frees removed entries.
1246 */
1247 static int do_putenv(char **env, const char *name, int size, int free_old)
1248 {
1249 int i = bsearchenv(env, name, size - 1);
1250
1251 /* optionally free removed / replaced entry */
1252 if (i >= 0 && free_old)
1253 free(env[i]);
1254
1255 if (strchr(name, '=')) {
1256 /* if new value ('key=value') is specified, insert or replace entry */
1257 if (i < 0) {
1258 i = ~i;
1259 memmove(&env[i + 1], &env[i], (size - i) * sizeof(char*));
1260 size++;
1261 }
1262 env[i] = (char*) name;
1263 } else if (i >= 0) {
1264 /* otherwise ('key') remove existing entry */
1265 size--;
1266 memmove(&env[i], &env[i + 1], (size - i) * sizeof(char*));
1267 }
1268 return size;
1269 }
1270
1271 char *mingw_getenv(const char *name)
1272 {
1273 char *value;
1274 int pos = bsearchenv(environ, name, environ_size - 1);
1275 if (pos < 0)
1276 return NULL;
1277 value = strchr(environ[pos], '=');
1278 return value ? &value[1] : NULL;
1279 }
1280
1281 int mingw_putenv(const char *namevalue)
1282 {
1283 ALLOC_GROW(environ, (environ_size + 1) * sizeof(char*), environ_alloc);
1284 environ_size = do_putenv(environ, namevalue, environ_size, 1);
1285 return 0;
1286 }
1287
1288 /*
1289 * Note, this isn't a complete replacement for getaddrinfo. It assumes
1290 * that service contains a numerical port, or that it is null. It
1291 * does a simple search using gethostbyname, and returns one IPv4 host
1292 * if one was found.
1293 */
1294 static int WSAAPI getaddrinfo_stub(const char *node, const char *service,
1295 const struct addrinfo *hints,
1296 struct addrinfo **res)
1297 {
1298 struct hostent *h = NULL;
1299 struct addrinfo *ai;
1300 struct sockaddr_in *sin;
1301
1302 if (node) {
1303 h = gethostbyname(node);
1304 if (!h)
1305 return WSAGetLastError();
1306 }
1307
1308 ai = xmalloc(sizeof(struct addrinfo));
1309 *res = ai;
1310 ai->ai_flags = 0;
1311 ai->ai_family = AF_INET;
1312 ai->ai_socktype = hints ? hints->ai_socktype : 0;
1313 switch (ai->ai_socktype) {
1314 case SOCK_STREAM:
1315 ai->ai_protocol = IPPROTO_TCP;
1316 break;
1317 case SOCK_DGRAM:
1318 ai->ai_protocol = IPPROTO_UDP;
1319 break;
1320 default:
1321 ai->ai_protocol = 0;
1322 break;
1323 }
1324 ai->ai_addrlen = sizeof(struct sockaddr_in);
1325 if (hints && (hints->ai_flags & AI_CANONNAME))
1326 ai->ai_canonname = h ? xstrdup(h->h_name) : NULL;
1327 else
1328 ai->ai_canonname = NULL;
1329
1330 sin = xcalloc(1, ai->ai_addrlen);
1331 sin->sin_family = AF_INET;
1332 /* Note: getaddrinfo is supposed to allow service to be a string,
1333 * which should be looked up using getservbyname. This is
1334 * currently not implemented */
1335 if (service)
1336 sin->sin_port = htons(atoi(service));
1337 if (h)
1338 sin->sin_addr = *(struct in_addr *)h->h_addr;
1339 else if (hints && (hints->ai_flags & AI_PASSIVE))
1340 sin->sin_addr.s_addr = INADDR_ANY;
1341 else
1342 sin->sin_addr.s_addr = INADDR_LOOPBACK;
1343 ai->ai_addr = (struct sockaddr *)sin;
1344 ai->ai_next = NULL;
1345 return 0;
1346 }
1347
1348 static void WSAAPI freeaddrinfo_stub(struct addrinfo *res)
1349 {
1350 free(res->ai_canonname);
1351 free(res->ai_addr);
1352 free(res);
1353 }
1354
1355 static int WSAAPI getnameinfo_stub(const struct sockaddr *sa, socklen_t salen,
1356 char *host, DWORD hostlen,
1357 char *serv, DWORD servlen, int flags)
1358 {
1359 const struct sockaddr_in *sin = (const struct sockaddr_in *)sa;
1360 if (sa->sa_family != AF_INET)
1361 return EAI_FAMILY;
1362 if (!host && !serv)
1363 return EAI_NONAME;
1364
1365 if (host && hostlen > 0) {
1366 struct hostent *ent = NULL;
1367 if (!(flags & NI_NUMERICHOST))
1368 ent = gethostbyaddr((const char *)&sin->sin_addr,
1369 sizeof(sin->sin_addr), AF_INET);
1370
1371 if (ent)
1372 snprintf(host, hostlen, "%s", ent->h_name);
1373 else if (flags & NI_NAMEREQD)
1374 return EAI_NONAME;
1375 else
1376 snprintf(host, hostlen, "%s", inet_ntoa(sin->sin_addr));
1377 }
1378
1379 if (serv && servlen > 0) {
1380 struct servent *ent = NULL;
1381 if (!(flags & NI_NUMERICSERV))
1382 ent = getservbyport(sin->sin_port,
1383 flags & NI_DGRAM ? "udp" : "tcp");
1384
1385 if (ent)
1386 snprintf(serv, servlen, "%s", ent->s_name);
1387 else
1388 snprintf(serv, servlen, "%d", ntohs(sin->sin_port));
1389 }
1390
1391 return 0;
1392 }
1393
1394 static HMODULE ipv6_dll = NULL;
1395 static void (WSAAPI *ipv6_freeaddrinfo)(struct addrinfo *res);
1396 static int (WSAAPI *ipv6_getaddrinfo)(const char *node, const char *service,
1397 const struct addrinfo *hints,
1398 struct addrinfo **res);
1399 static int (WSAAPI *ipv6_getnameinfo)(const struct sockaddr *sa, socklen_t salen,
1400 char *host, DWORD hostlen,
1401 char *serv, DWORD servlen, int flags);
1402 /*
1403 * gai_strerror is an inline function in the ws2tcpip.h header, so we
1404 * don't need to try to load that one dynamically.
1405 */
1406
1407 static void socket_cleanup(void)
1408 {
1409 WSACleanup();
1410 if (ipv6_dll)
1411 FreeLibrary(ipv6_dll);
1412 ipv6_dll = NULL;
1413 ipv6_freeaddrinfo = freeaddrinfo_stub;
1414 ipv6_getaddrinfo = getaddrinfo_stub;
1415 ipv6_getnameinfo = getnameinfo_stub;
1416 }
1417
1418 static void ensure_socket_initialization(void)
1419 {
1420 WSADATA wsa;
1421 static int initialized = 0;
1422 const char *libraries[] = { "ws2_32.dll", "wship6.dll", NULL };
1423 const char **name;
1424
1425 if (initialized)
1426 return;
1427
1428 if (WSAStartup(MAKEWORD(2,2), &wsa))
1429 die("unable to initialize winsock subsystem, error %d",
1430 WSAGetLastError());
1431
1432 for (name = libraries; *name; name++) {
1433 ipv6_dll = LoadLibrary(*name);
1434 if (!ipv6_dll)
1435 continue;
1436
1437 ipv6_freeaddrinfo = (void (WSAAPI *)(struct addrinfo *))
1438 GetProcAddress(ipv6_dll, "freeaddrinfo");
1439 ipv6_getaddrinfo = (int (WSAAPI *)(const char *, const char *,
1440 const struct addrinfo *,
1441 struct addrinfo **))
1442 GetProcAddress(ipv6_dll, "getaddrinfo");
1443 ipv6_getnameinfo = (int (WSAAPI *)(const struct sockaddr *,
1444 socklen_t, char *, DWORD,
1445 char *, DWORD, int))
1446 GetProcAddress(ipv6_dll, "getnameinfo");
1447 if (!ipv6_freeaddrinfo || !ipv6_getaddrinfo || !ipv6_getnameinfo) {
1448 FreeLibrary(ipv6_dll);
1449 ipv6_dll = NULL;
1450 } else
1451 break;
1452 }
1453 if (!ipv6_freeaddrinfo || !ipv6_getaddrinfo || !ipv6_getnameinfo) {
1454 ipv6_freeaddrinfo = freeaddrinfo_stub;
1455 ipv6_getaddrinfo = getaddrinfo_stub;
1456 ipv6_getnameinfo = getnameinfo_stub;
1457 }
1458
1459 atexit(socket_cleanup);
1460 initialized = 1;
1461 }
1462
1463 #undef gethostname
1464 int mingw_gethostname(char *name, int namelen)
1465 {
1466 ensure_socket_initialization();
1467 return gethostname(name, namelen);
1468 }
1469
1470 #undef gethostbyname
1471 struct hostent *mingw_gethostbyname(const char *host)
1472 {
1473 ensure_socket_initialization();
1474 return gethostbyname(host);
1475 }
1476
1477 void mingw_freeaddrinfo(struct addrinfo *res)
1478 {
1479 ipv6_freeaddrinfo(res);
1480 }
1481
1482 int mingw_getaddrinfo(const char *node, const char *service,
1483 const struct addrinfo *hints, struct addrinfo **res)
1484 {
1485 ensure_socket_initialization();
1486 return ipv6_getaddrinfo(node, service, hints, res);
1487 }
1488
1489 int mingw_getnameinfo(const struct sockaddr *sa, socklen_t salen,
1490 char *host, DWORD hostlen, char *serv, DWORD servlen,
1491 int flags)
1492 {
1493 ensure_socket_initialization();
1494 return ipv6_getnameinfo(sa, salen, host, hostlen, serv, servlen, flags);
1495 }
1496
1497 int mingw_socket(int domain, int type, int protocol)
1498 {
1499 int sockfd;
1500 SOCKET s;
1501
1502 ensure_socket_initialization();
1503 s = WSASocket(domain, type, protocol, NULL, 0, 0);
1504 if (s == INVALID_SOCKET) {
1505 /*
1506 * WSAGetLastError() values are regular BSD error codes
1507 * biased by WSABASEERR.
1508 * However, strerror() does not know about networking
1509 * specific errors, which are values beginning at 38 or so.
1510 * Therefore, we choose to leave the biased error code
1511 * in errno so that _if_ someone looks up the code somewhere,
1512 * then it is at least the number that are usually listed.
1513 */
1514 errno = WSAGetLastError();
1515 return -1;
1516 }
1517 /* convert into a file descriptor */
1518 if ((sockfd = _open_osfhandle(s, O_RDWR|O_BINARY)) < 0) {
1519 closesocket(s);
1520 return error("unable to make a socket file descriptor: %s",
1521 strerror(errno));
1522 }
1523 return sockfd;
1524 }
1525
1526 #undef connect
1527 int mingw_connect(int sockfd, struct sockaddr *sa, size_t sz)
1528 {
1529 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
1530 return connect(s, sa, sz);
1531 }
1532
1533 #undef bind
1534 int mingw_bind(int sockfd, struct sockaddr *sa, size_t sz)
1535 {
1536 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
1537 return bind(s, sa, sz);
1538 }
1539
1540 #undef setsockopt
1541 int mingw_setsockopt(int sockfd, int lvl, int optname, void *optval, int optlen)
1542 {
1543 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
1544 return setsockopt(s, lvl, optname, (const char*)optval, optlen);
1545 }
1546
1547 #undef shutdown
1548 int mingw_shutdown(int sockfd, int how)
1549 {
1550 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
1551 return shutdown(s, how);
1552 }
1553
1554 #undef listen
1555 int mingw_listen(int sockfd, int backlog)
1556 {
1557 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
1558 return listen(s, backlog);
1559 }
1560
1561 #undef accept
1562 int mingw_accept(int sockfd1, struct sockaddr *sa, socklen_t *sz)
1563 {
1564 int sockfd2;
1565
1566 SOCKET s1 = (SOCKET)_get_osfhandle(sockfd1);
1567 SOCKET s2 = accept(s1, sa, sz);
1568
1569 /* convert into a file descriptor */
1570 if ((sockfd2 = _open_osfhandle(s2, O_RDWR|O_BINARY)) < 0) {
1571 int err = errno;
1572 closesocket(s2);
1573 return error("unable to make a socket file descriptor: %s",
1574 strerror(err));
1575 }
1576 return sockfd2;
1577 }
1578
1579 #undef rename
1580 int mingw_rename(const char *pold, const char *pnew)
1581 {
1582 DWORD attrs, gle;
1583 int tries = 0;
1584 wchar_t wpold[MAX_PATH], wpnew[MAX_PATH];
1585 if (xutftowcs_path(wpold, pold) < 0 || xutftowcs_path(wpnew, pnew) < 0)
1586 return -1;
1587
1588 /*
1589 * Try native rename() first to get errno right.
1590 * It is based on MoveFile(), which cannot overwrite existing files.
1591 */
1592 if (!_wrename(wpold, wpnew))
1593 return 0;
1594 if (errno != EEXIST)
1595 return -1;
1596 repeat:
1597 if (MoveFileExW(wpold, wpnew, MOVEFILE_REPLACE_EXISTING))
1598 return 0;
1599 /* TODO: translate more errors */
1600 gle = GetLastError();
1601 if (gle == ERROR_ACCESS_DENIED &&
1602 (attrs = GetFileAttributesW(wpnew)) != INVALID_FILE_ATTRIBUTES) {
1603 if (attrs & FILE_ATTRIBUTE_DIRECTORY) {
1604 errno = EISDIR;
1605 return -1;
1606 }
1607 if ((attrs & FILE_ATTRIBUTE_READONLY) &&
1608 SetFileAttributesW(wpnew, attrs & ~FILE_ATTRIBUTE_READONLY)) {
1609 if (MoveFileExW(wpold, wpnew, MOVEFILE_REPLACE_EXISTING))
1610 return 0;
1611 gle = GetLastError();
1612 /* revert file attributes on failure */
1613 SetFileAttributesW(wpnew, attrs);
1614 }
1615 }
1616 if (tries < ARRAY_SIZE(delay) && gle == ERROR_ACCESS_DENIED) {
1617 /*
1618 * We assume that some other process had the source or
1619 * destination file open at the wrong moment and retry.
1620 * In order to give the other process a higher chance to
1621 * complete its operation, we give up our time slice now.
1622 * If we have to retry again, we do sleep a bit.
1623 */
1624 Sleep(delay[tries]);
1625 tries++;
1626 goto repeat;
1627 }
1628 if (gle == ERROR_ACCESS_DENIED &&
1629 ask_yes_no_if_possible("Rename from '%s' to '%s' failed. "
1630 "Should I try again?", pold, pnew))
1631 goto repeat;
1632
1633 errno = EACCES;
1634 return -1;
1635 }
1636
1637 /*
1638 * Note that this doesn't return the actual pagesize, but
1639 * the allocation granularity. If future Windows specific git code
1640 * needs the real getpagesize function, we need to find another solution.
1641 */
1642 int mingw_getpagesize(void)
1643 {
1644 SYSTEM_INFO si;
1645 GetSystemInfo(&si);
1646 return si.dwAllocationGranularity;
1647 }
1648
1649 struct passwd *getpwuid(int uid)
1650 {
1651 static char user_name[100];
1652 static struct passwd p;
1653
1654 DWORD len = sizeof(user_name);
1655 if (!GetUserName(user_name, &len))
1656 return NULL;
1657 p.pw_name = user_name;
1658 p.pw_gecos = "unknown";
1659 p.pw_dir = NULL;
1660 return &p;
1661 }
1662
1663 static HANDLE timer_event;
1664 static HANDLE timer_thread;
1665 static int timer_interval;
1666 static int one_shot;
1667 static sig_handler_t timer_fn = SIG_DFL, sigint_fn = SIG_DFL;
1668
1669 /* The timer works like this:
1670 * The thread, ticktack(), is a trivial routine that most of the time
1671 * only waits to receive the signal to terminate. The main thread tells
1672 * the thread to terminate by setting the timer_event to the signalled
1673 * state.
1674 * But ticktack() interrupts the wait state after the timer's interval
1675 * length to call the signal handler.
1676 */
1677
1678 static unsigned __stdcall ticktack(void *dummy)
1679 {
1680 while (WaitForSingleObject(timer_event, timer_interval) == WAIT_TIMEOUT) {
1681 mingw_raise(SIGALRM);
1682 if (one_shot)
1683 break;
1684 }
1685 return 0;
1686 }
1687
1688 static int start_timer_thread(void)
1689 {
1690 timer_event = CreateEvent(NULL, FALSE, FALSE, NULL);
1691 if (timer_event) {
1692 timer_thread = (HANDLE) _beginthreadex(NULL, 0, ticktack, NULL, 0, NULL);
1693 if (!timer_thread )
1694 return errno = ENOMEM,
1695 error("cannot start timer thread");
1696 } else
1697 return errno = ENOMEM,
1698 error("cannot allocate resources for timer");
1699 return 0;
1700 }
1701
1702 static void stop_timer_thread(void)
1703 {
1704 if (timer_event)
1705 SetEvent(timer_event); /* tell thread to terminate */
1706 if (timer_thread) {
1707 int rc = WaitForSingleObject(timer_thread, 1000);
1708 if (rc == WAIT_TIMEOUT)
1709 error("timer thread did not terminate timely");
1710 else if (rc != WAIT_OBJECT_0)
1711 error("waiting for timer thread failed: %lu",
1712 GetLastError());
1713 CloseHandle(timer_thread);
1714 }
1715 if (timer_event)
1716 CloseHandle(timer_event);
1717 timer_event = NULL;
1718 timer_thread = NULL;
1719 }
1720
1721 static inline int is_timeval_eq(const struct timeval *i1, const struct timeval *i2)
1722 {
1723 return i1->tv_sec == i2->tv_sec && i1->tv_usec == i2->tv_usec;
1724 }
1725
1726 int setitimer(int type, struct itimerval *in, struct itimerval *out)
1727 {
1728 static const struct timeval zero;
1729 static int atexit_done;
1730
1731 if (out != NULL)
1732 return errno = EINVAL,
1733 error("setitimer param 3 != NULL not implemented");
1734 if (!is_timeval_eq(&in->it_interval, &zero) &&
1735 !is_timeval_eq(&in->it_interval, &in->it_value))
1736 return errno = EINVAL,
1737 error("setitimer: it_interval must be zero or eq it_value");
1738
1739 if (timer_thread)
1740 stop_timer_thread();
1741
1742 if (is_timeval_eq(&in->it_value, &zero) &&
1743 is_timeval_eq(&in->it_interval, &zero))
1744 return 0;
1745
1746 timer_interval = in->it_value.tv_sec * 1000 + in->it_value.tv_usec / 1000;
1747 one_shot = is_timeval_eq(&in->it_interval, &zero);
1748 if (!atexit_done) {
1749 atexit(stop_timer_thread);
1750 atexit_done = 1;
1751 }
1752 return start_timer_thread();
1753 }
1754
1755 int sigaction(int sig, struct sigaction *in, struct sigaction *out)
1756 {
1757 if (sig != SIGALRM)
1758 return errno = EINVAL,
1759 error("sigaction only implemented for SIGALRM");
1760 if (out != NULL)
1761 return errno = EINVAL,
1762 error("sigaction: param 3 != NULL not implemented");
1763
1764 timer_fn = in->sa_handler;
1765 return 0;
1766 }
1767
1768 #undef signal
1769 sig_handler_t mingw_signal(int sig, sig_handler_t handler)
1770 {
1771 sig_handler_t old;
1772
1773 switch (sig) {
1774 case SIGALRM:
1775 old = timer_fn;
1776 timer_fn = handler;
1777 break;
1778
1779 case SIGINT:
1780 old = sigint_fn;
1781 sigint_fn = handler;
1782 break;
1783
1784 default:
1785 return signal(sig, handler);
1786 }
1787
1788 return old;
1789 }
1790
1791 #undef raise
1792 int mingw_raise(int sig)
1793 {
1794 switch (sig) {
1795 case SIGALRM:
1796 if (timer_fn == SIG_DFL) {
1797 if (isatty(STDERR_FILENO))
1798 fputs("Alarm clock\n", stderr);
1799 exit(128 + SIGALRM);
1800 } else if (timer_fn != SIG_IGN)
1801 timer_fn(SIGALRM);
1802 return 0;
1803
1804 case SIGINT:
1805 if (sigint_fn == SIG_DFL)
1806 exit(128 + SIGINT);
1807 else if (sigint_fn != SIG_IGN)
1808 sigint_fn(SIGINT);
1809 return 0;
1810
1811 default:
1812 return raise(sig);
1813 }
1814 }
1815
1816
1817 static const char *make_backslash_path(const char *path)
1818 {
1819 static char buf[PATH_MAX + 1];
1820 char *c;
1821
1822 if (strlcpy(buf, path, PATH_MAX) >= PATH_MAX)
1823 die("Too long path: %.*s", 60, path);
1824
1825 for (c = buf; *c; c++) {
1826 if (*c == '/')
1827 *c = '\\';
1828 }
1829 return buf;
1830 }
1831
1832 void mingw_open_html(const char *unixpath)
1833 {
1834 const char *htmlpath = make_backslash_path(unixpath);
1835 typedef HINSTANCE (WINAPI *T)(HWND, const char *,
1836 const char *, const char *, const char *, INT);
1837 T ShellExecute;
1838 HMODULE shell32;
1839 int r;
1840
1841 shell32 = LoadLibrary("shell32.dll");
1842 if (!shell32)
1843 die("cannot load shell32.dll");
1844 ShellExecute = (T)GetProcAddress(shell32, "ShellExecuteA");
1845 if (!ShellExecute)
1846 die("cannot run browser");
1847
1848 printf("Launching default browser to display HTML ...\n");
1849 r = (int)ShellExecute(NULL, "open", htmlpath, NULL, "\\", SW_SHOWNORMAL);
1850 FreeLibrary(shell32);
1851 /* see the MSDN documentation referring to the result codes here */
1852 if (r <= 32) {
1853 die("failed to launch browser for %.*s", MAX_PATH, unixpath);
1854 }
1855 }
1856
1857 int link(const char *oldpath, const char *newpath)
1858 {
1859 typedef BOOL (WINAPI *T)(LPCWSTR, LPCWSTR, LPSECURITY_ATTRIBUTES);
1860 static T create_hard_link = NULL;
1861 wchar_t woldpath[MAX_PATH], wnewpath[MAX_PATH];
1862 if (xutftowcs_path(woldpath, oldpath) < 0 ||
1863 xutftowcs_path(wnewpath, newpath) < 0)
1864 return -1;
1865
1866 if (!create_hard_link) {
1867 create_hard_link = (T) GetProcAddress(
1868 GetModuleHandle("kernel32.dll"), "CreateHardLinkW");
1869 if (!create_hard_link)
1870 create_hard_link = (T)-1;
1871 }
1872 if (create_hard_link == (T)-1) {
1873 errno = ENOSYS;
1874 return -1;
1875 }
1876 if (!create_hard_link(wnewpath, woldpath, NULL)) {
1877 errno = err_win_to_posix(GetLastError());
1878 return -1;
1879 }
1880 return 0;
1881 }
1882
1883 pid_t waitpid(pid_t pid, int *status, int options)
1884 {
1885 HANDLE h = OpenProcess(SYNCHRONIZE | PROCESS_QUERY_INFORMATION,
1886 FALSE, pid);
1887 if (!h) {
1888 errno = ECHILD;
1889 return -1;
1890 }
1891
1892 if (pid > 0 && options & WNOHANG) {
1893 if (WAIT_OBJECT_0 != WaitForSingleObject(h, 0)) {
1894 CloseHandle(h);
1895 return 0;
1896 }
1897 options &= ~WNOHANG;
1898 }
1899
1900 if (options == 0) {
1901 struct pinfo_t **ppinfo;
1902 if (WaitForSingleObject(h, INFINITE) != WAIT_OBJECT_0) {
1903 CloseHandle(h);
1904 return 0;
1905 }
1906
1907 if (status)
1908 GetExitCodeProcess(h, (LPDWORD)status);
1909
1910 EnterCriticalSection(&pinfo_cs);
1911
1912 ppinfo = &pinfo;
1913 while (*ppinfo) {
1914 struct pinfo_t *info = *ppinfo;
1915 if (info->pid == pid) {
1916 CloseHandle(info->proc);
1917 *ppinfo = info->next;
1918 free(info);
1919 break;
1920 }
1921 ppinfo = &info->next;
1922 }
1923
1924 LeaveCriticalSection(&pinfo_cs);
1925
1926 CloseHandle(h);
1927 return pid;
1928 }
1929 CloseHandle(h);
1930
1931 errno = EINVAL;
1932 return -1;
1933 }
1934
1935 int mingw_offset_1st_component(const char *path)
1936 {
1937 int offset = 0;
1938 if (has_dos_drive_prefix(path))
1939 offset = 2;
1940
1941 /* unc paths */
1942 else if (is_dir_sep(path[0]) && is_dir_sep(path[1])) {
1943
1944 /* skip server name */
1945 char *pos = strpbrk(path + 2, "\\/");
1946 if (!pos)
1947 return 0; /* Error: malformed unc path */
1948
1949 do {
1950 pos++;
1951 } while (*pos && !is_dir_sep(*pos));
1952
1953 offset = pos - path;
1954 }
1955
1956 return offset + is_dir_sep(path[offset]);
1957 }
1958
1959 int xutftowcsn(wchar_t *wcs, const char *utfs, size_t wcslen, int utflen)
1960 {
1961 int upos = 0, wpos = 0;
1962 const unsigned char *utf = (const unsigned char*) utfs;
1963 if (!utf || !wcs || wcslen < 1) {
1964 errno = EINVAL;
1965 return -1;
1966 }
1967 /* reserve space for \0 */
1968 wcslen--;
1969 if (utflen < 0)
1970 utflen = INT_MAX;
1971
1972 while (upos < utflen) {
1973 int c = utf[upos++] & 0xff;
1974 if (utflen == INT_MAX && c == 0)
1975 break;
1976
1977 if (wpos >= wcslen) {
1978 wcs[wpos] = 0;
1979 errno = ERANGE;
1980 return -1;
1981 }
1982
1983 if (c < 0x80) {
1984 /* ASCII */
1985 wcs[wpos++] = c;
1986 } else if (c >= 0xc2 && c < 0xe0 && upos < utflen &&
1987 (utf[upos] & 0xc0) == 0x80) {
1988 /* 2-byte utf-8 */
1989 c = ((c & 0x1f) << 6);
1990 c |= (utf[upos++] & 0x3f);
1991 wcs[wpos++] = c;
1992 } else if (c >= 0xe0 && c < 0xf0 && upos + 1 < utflen &&
1993 !(c == 0xe0 && utf[upos] < 0xa0) && /* over-long encoding */
1994 (utf[upos] & 0xc0) == 0x80 &&
1995 (utf[upos + 1] & 0xc0) == 0x80) {
1996 /* 3-byte utf-8 */
1997 c = ((c & 0x0f) << 12);
1998 c |= ((utf[upos++] & 0x3f) << 6);
1999 c |= (utf[upos++] & 0x3f);
2000 wcs[wpos++] = c;
2001 } else if (c >= 0xf0 && c < 0xf5 && upos + 2 < utflen &&
2002 wpos + 1 < wcslen &&
2003 !(c == 0xf0 && utf[upos] < 0x90) && /* over-long encoding */
2004 !(c == 0xf4 && utf[upos] >= 0x90) && /* > \u10ffff */
2005 (utf[upos] & 0xc0) == 0x80 &&
2006 (utf[upos + 1] & 0xc0) == 0x80 &&
2007 (utf[upos + 2] & 0xc0) == 0x80) {
2008 /* 4-byte utf-8: convert to \ud8xx \udcxx surrogate pair */
2009 c = ((c & 0x07) << 18);
2010 c |= ((utf[upos++] & 0x3f) << 12);
2011 c |= ((utf[upos++] & 0x3f) << 6);
2012 c |= (utf[upos++] & 0x3f);
2013 c -= 0x10000;
2014 wcs[wpos++] = 0xd800 | (c >> 10);
2015 wcs[wpos++] = 0xdc00 | (c & 0x3ff);
2016 } else if (c >= 0xa0) {
2017 /* invalid utf-8 byte, printable unicode char: convert 1:1 */
2018 wcs[wpos++] = c;
2019 } else {
2020 /* invalid utf-8 byte, non-printable unicode: convert to hex */
2021 static const char *hex = "0123456789abcdef";
2022 wcs[wpos++] = hex[c >> 4];
2023 if (wpos < wcslen)
2024 wcs[wpos++] = hex[c & 0x0f];
2025 }
2026 }
2027 wcs[wpos] = 0;
2028 return wpos;
2029 }
2030
2031 int xwcstoutf(char *utf, const wchar_t *wcs, size_t utflen)
2032 {
2033 if (!wcs || !utf || utflen < 1) {
2034 errno = EINVAL;
2035 return -1;
2036 }
2037 utflen = WideCharToMultiByte(CP_UTF8, 0, wcs, -1, utf, utflen, NULL, NULL);
2038 if (utflen)
2039 return utflen - 1;
2040 errno = ERANGE;
2041 return -1;
2042 }
2043
2044 /*
2045 * Disable MSVCRT command line wildcard expansion (__getmainargs called from
2046 * mingw startup code, see init.c in mingw runtime).
2047 */
2048 int _CRT_glob = 0;
2049
2050 typedef struct {
2051 int newmode;
2052 } _startupinfo;
2053
2054 extern int __wgetmainargs(int *argc, wchar_t ***argv, wchar_t ***env, int glob,
2055 _startupinfo *si);
2056
2057 static NORETURN void die_startup()
2058 {
2059 fputs("fatal: not enough memory for initialization", stderr);
2060 exit(128);
2061 }
2062
2063 static void *malloc_startup(size_t size)
2064 {
2065 void *result = malloc(size);
2066 if (!result)
2067 die_startup();
2068 return result;
2069 }
2070
2071 static char *wcstoutfdup_startup(char *buffer, const wchar_t *wcs, size_t len)
2072 {
2073 len = xwcstoutf(buffer, wcs, len) + 1;
2074 return memcpy(malloc_startup(len), buffer, len);
2075 }
2076
2077 void mingw_startup()
2078 {
2079 int i, maxlen, argc;
2080 char *buffer;
2081 wchar_t **wenv, **wargv;
2082 _startupinfo si;
2083
2084 /* get wide char arguments and environment */
2085 si.newmode = 0;
2086 if (__wgetmainargs(&argc, &wargv, &wenv, _CRT_glob, &si) < 0)
2087 die_startup();
2088
2089 /* determine size of argv and environ conversion buffer */
2090 maxlen = wcslen(_wpgmptr);
2091 for (i = 1; i < argc; i++)
2092 maxlen = max(maxlen, wcslen(wargv[i]));
2093 for (i = 0; wenv[i]; i++)
2094 maxlen = max(maxlen, wcslen(wenv[i]));
2095
2096 /*
2097 * nedmalloc can't free CRT memory, allocate resizable environment
2098 * list. Note that xmalloc / xmemdupz etc. call getenv, so we cannot
2099 * use it while initializing the environment itself.
2100 */
2101 environ_size = i + 1;
2102 environ_alloc = alloc_nr(environ_size * sizeof(char*));
2103 environ = malloc_startup(environ_alloc);
2104
2105 /* allocate buffer (wchar_t encodes to max 3 UTF-8 bytes) */
2106 maxlen = 3 * maxlen + 1;
2107 buffer = malloc_startup(maxlen);
2108
2109 /* convert command line arguments and environment to UTF-8 */
2110 __argv[0] = wcstoutfdup_startup(buffer, _wpgmptr, maxlen);
2111 for (i = 1; i < argc; i++)
2112 __argv[i] = wcstoutfdup_startup(buffer, wargv[i], maxlen);
2113 for (i = 0; wenv[i]; i++)
2114 environ[i] = wcstoutfdup_startup(buffer, wenv[i], maxlen);
2115 environ[i] = NULL;
2116 free(buffer);
2117
2118 /* sort environment for O(log n) getenv / putenv */
2119 qsort(environ, i, sizeof(char*), compareenv);
2120
2121 /* fix Windows specific environment settings */
2122
2123 /* on Windows it is TMP and TEMP */
2124 if (!mingw_getenv("TMPDIR")) {
2125 const char *tmp = mingw_getenv("TMP");
2126 if (!tmp)
2127 tmp = mingw_getenv("TEMP");
2128 if (tmp)
2129 setenv("TMPDIR", tmp, 1);
2130 }
2131
2132 /* simulate TERM to enable auto-color (see color.c) */
2133 if (!getenv("TERM"))
2134 setenv("TERM", "cygwin", 1);
2135
2136 /* initialize critical section for waitpid pinfo_t list */
2137 InitializeCriticalSection(&pinfo_cs);
2138
2139 /* set up default file mode and file modes for stdin/out/err */
2140 _fmode = _O_BINARY;
2141 _setmode(_fileno(stdin), _O_BINARY);
2142 _setmode(_fileno(stdout), _O_BINARY);
2143 _setmode(_fileno(stderr), _O_BINARY);
2144
2145 /* initialize Unicode console */
2146 winansi_init();
2147 }
2148
2149 int uname(struct utsname *buf)
2150 {
2151 unsigned v = (unsigned)GetVersion();
2152 memset(buf, 0, sizeof(*buf));
2153 xsnprintf(buf->sysname, sizeof(buf->sysname), "Windows");
2154 xsnprintf(buf->release, sizeof(buf->release),
2155 "%u.%u", v & 0xff, (v >> 8) & 0xff);
2156 /* assuming NT variants only.. */
2157 xsnprintf(buf->version, sizeof(buf->version),
2158 "%u", (v >> 16) & 0x7fff);
2159 return 0;
2160 }
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