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Win32: Unicode arguments (outgoing)
[git/dscho.git] / compat / mingw.c
blob069fd6250296f55bf571dec7888d06120f32b246
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 unsigned int _CRT_fmode = _O_BINARY;
11
12 int err_win_to_posix(DWORD winerr)
13 {
14 int error = ENOSYS;
15 switch(winerr) {
16 case ERROR_ACCESS_DENIED: error = EACCES; break;
17 case ERROR_ACCOUNT_DISABLED: error = EACCES; break;
18 case ERROR_ACCOUNT_RESTRICTION: error = EACCES; break;
19 case ERROR_ALREADY_ASSIGNED: error = EBUSY; break;
20 case ERROR_ALREADY_EXISTS: error = EEXIST; break;
21 case ERROR_ARITHMETIC_OVERFLOW: error = ERANGE; break;
22 case ERROR_BAD_COMMAND: error = EIO; break;
23 case ERROR_BAD_DEVICE: error = ENODEV; break;
24 case ERROR_BAD_DRIVER_LEVEL: error = ENXIO; break;
25 case ERROR_BAD_EXE_FORMAT: error = ENOEXEC; break;
26 case ERROR_BAD_FORMAT: error = ENOEXEC; break;
27 case ERROR_BAD_LENGTH: error = EINVAL; break;
28 case ERROR_BAD_PATHNAME: error = ENOENT; break;
29 case ERROR_BAD_PIPE: error = EPIPE; break;
30 case ERROR_BAD_UNIT: error = ENODEV; break;
31 case ERROR_BAD_USERNAME: error = EINVAL; break;
32 case ERROR_BROKEN_PIPE: error = EPIPE; break;
33 case ERROR_BUFFER_OVERFLOW: error = ENAMETOOLONG; break;
34 case ERROR_BUSY: error = EBUSY; break;
35 case ERROR_BUSY_DRIVE: error = EBUSY; break;
36 case ERROR_CALL_NOT_IMPLEMENTED: error = ENOSYS; break;
37 case ERROR_CANNOT_MAKE: error = EACCES; break;
38 case ERROR_CANTOPEN: error = EIO; break;
39 case ERROR_CANTREAD: error = EIO; break;
40 case ERROR_CANTWRITE: error = EIO; break;
41 case ERROR_CRC: error = EIO; break;
42 case ERROR_CURRENT_DIRECTORY: error = EACCES; break;
43 case ERROR_DEVICE_IN_USE: error = EBUSY; break;
44 case ERROR_DEV_NOT_EXIST: error = ENODEV; break;
45 case ERROR_DIRECTORY: error = EINVAL; break;
46 case ERROR_DIR_NOT_EMPTY: error = ENOTEMPTY; break;
47 case ERROR_DISK_CHANGE: error = EIO; break;
48 case ERROR_DISK_FULL: error = ENOSPC; break;
49 case ERROR_DRIVE_LOCKED: error = EBUSY; break;
50 case ERROR_ENVVAR_NOT_FOUND: error = EINVAL; break;
51 case ERROR_EXE_MARKED_INVALID: error = ENOEXEC; break;
52 case ERROR_FILENAME_EXCED_RANGE: error = ENAMETOOLONG; break;
53 case ERROR_FILE_EXISTS: error = EEXIST; break;
54 case ERROR_FILE_INVALID: error = ENODEV; break;
55 case ERROR_FILE_NOT_FOUND: error = ENOENT; break;
56 case ERROR_GEN_FAILURE: error = EIO; break;
57 case ERROR_HANDLE_DISK_FULL: error = ENOSPC; break;
58 case ERROR_INSUFFICIENT_BUFFER: error = ENOMEM; break;
59 case ERROR_INVALID_ACCESS: error = EACCES; break;
60 case ERROR_INVALID_ADDRESS: error = EFAULT; break;
61 case ERROR_INVALID_BLOCK: error = EFAULT; break;
62 case ERROR_INVALID_DATA: error = EINVAL; break;
63 case ERROR_INVALID_DRIVE: error = ENODEV; break;
64 case ERROR_INVALID_EXE_SIGNATURE: error = ENOEXEC; break;
65 case ERROR_INVALID_FLAGS: error = EINVAL; break;
66 case ERROR_INVALID_FUNCTION: error = ENOSYS; break;
67 case ERROR_INVALID_HANDLE: error = EBADF; break;
68 case ERROR_INVALID_LOGON_HOURS: error = EACCES; break;
69 case ERROR_INVALID_NAME: error = EINVAL; break;
70 case ERROR_INVALID_OWNER: error = EINVAL; break;
71 case ERROR_INVALID_PARAMETER: error = EINVAL; break;
72 case ERROR_INVALID_PASSWORD: error = EPERM; break;
73 case ERROR_INVALID_PRIMARY_GROUP: error = EINVAL; break;
74 case ERROR_INVALID_SIGNAL_NUMBER: error = EINVAL; break;
75 case ERROR_INVALID_TARGET_HANDLE: error = EIO; break;
76 case ERROR_INVALID_WORKSTATION: error = EACCES; break;
77 case ERROR_IO_DEVICE: error = EIO; break;
78 case ERROR_IO_INCOMPLETE: error = EINTR; break;
79 case ERROR_LOCKED: error = EBUSY; break;
80 case ERROR_LOCK_VIOLATION: error = EACCES; break;
81 case ERROR_LOGON_FAILURE: error = EACCES; break;
82 case ERROR_MAPPED_ALIGNMENT: error = EINVAL; break;
83 case ERROR_META_EXPANSION_TOO_LONG: error = E2BIG; break;
84 case ERROR_MORE_DATA: error = EPIPE; break;
85 case ERROR_NEGATIVE_SEEK: error = ESPIPE; break;
86 case ERROR_NOACCESS: error = EFAULT; break;
87 case ERROR_NONE_MAPPED: error = EINVAL; break;
88 case ERROR_NOT_ENOUGH_MEMORY: error = ENOMEM; break;
89 case ERROR_NOT_READY: error = EAGAIN; break;
90 case ERROR_NOT_SAME_DEVICE: error = EXDEV; break;
91 case ERROR_NO_DATA: error = EPIPE; break;
92 case ERROR_NO_MORE_SEARCH_HANDLES: error = EIO; break;
93 case ERROR_NO_PROC_SLOTS: error = EAGAIN; break;
94 case ERROR_NO_SUCH_PRIVILEGE: error = EACCES; break;
95 case ERROR_OPEN_FAILED: error = EIO; break;
96 case ERROR_OPEN_FILES: error = EBUSY; break;
97 case ERROR_OPERATION_ABORTED: error = EINTR; break;
98 case ERROR_OUTOFMEMORY: error = ENOMEM; break;
99 case ERROR_PASSWORD_EXPIRED: error = EACCES; break;
100 case ERROR_PATH_BUSY: error = EBUSY; break;
101 case ERROR_PATH_NOT_FOUND: error = ENOENT; break;
102 case ERROR_PIPE_BUSY: error = EBUSY; break;
103 case ERROR_PIPE_CONNECTED: error = EPIPE; break;
104 case ERROR_PIPE_LISTENING: error = EPIPE; break;
105 case ERROR_PIPE_NOT_CONNECTED: error = EPIPE; break;
106 case ERROR_PRIVILEGE_NOT_HELD: error = EACCES; break;
107 case ERROR_READ_FAULT: error = EIO; break;
108 case ERROR_SEEK: error = EIO; break;
109 case ERROR_SEEK_ON_DEVICE: error = ESPIPE; break;
110 case ERROR_SHARING_BUFFER_EXCEEDED: error = ENFILE; break;
111 case ERROR_SHARING_VIOLATION: error = EACCES; break;
112 case ERROR_STACK_OVERFLOW: error = ENOMEM; break;
113 case ERROR_SWAPERROR: error = ENOENT; break;
114 case ERROR_TOO_MANY_MODULES: error = EMFILE; break;
115 case ERROR_TOO_MANY_OPEN_FILES: error = EMFILE; break;
116 case ERROR_UNRECOGNIZED_MEDIA: error = ENXIO; break;
117 case ERROR_UNRECOGNIZED_VOLUME: error = ENODEV; break;
118 case ERROR_WAIT_NO_CHILDREN: error = ECHILD; break;
119 case ERROR_WRITE_FAULT: error = EIO; break;
120 case ERROR_WRITE_PROTECT: error = EROFS; break;
121 }
122 return error;
123 }
124
125 static inline int is_file_in_use_error(DWORD errcode)
126 {
127 switch (errcode) {
128 case ERROR_SHARING_VIOLATION:
129 case ERROR_ACCESS_DENIED:
130 return 1;
131 }
132
133 return 0;
134 }
135
136 static int read_yes_no_answer(void)
137 {
138 char answer[1024];
139
140 if (fgets(answer, sizeof(answer), stdin)) {
141 size_t answer_len = strlen(answer);
142 int got_full_line = 0, c;
143
144 /* remove the newline */
145 if (answer_len >= 2 && answer[answer_len-2] == '\r') {
146 answer[answer_len-2] = '\0';
147 got_full_line = 1;
148 } else if (answer_len >= 1 && answer[answer_len-1] == '\n') {
149 answer[answer_len-1] = '\0';
150 got_full_line = 1;
151 }
152 /* flush the buffer in case we did not get the full line */
153 if (!got_full_line)
154 while ((c = getchar()) != EOF && c != '\n')
155 ;
156 } else
157 /* we could not read, return the
158 * default answer which is no */
159 return 0;
160
161 if (tolower(answer[0]) == 'y' && !answer[1])
162 return 1;
163 if (!strncasecmp(answer, "yes", sizeof(answer)))
164 return 1;
165 if (tolower(answer[0]) == 'n' && !answer[1])
166 return 0;
167 if (!strncasecmp(answer, "no", sizeof(answer)))
168 return 0;
169
170 /* did not find an answer we understand */
171 return -1;
172 }
173
174 static int ask_yes_no_if_possible(const char *format, ...)
175 {
176 char question[4096];
177 const char *retry_hook[] = { NULL, NULL, NULL };
178 va_list args;
179
180 va_start(args, format);
181 vsnprintf(question, sizeof(question), format, args);
182 va_end(args);
183
184 if ((retry_hook[0] = getenv("GIT_ASK_YESNO"))) {
185 retry_hook[1] = question;
186 return !run_command_v_opt(retry_hook, 0);
187 }
188
189 if (!isatty(_fileno(stdin)) || !isatty(_fileno(stderr)))
190 return 0;
191
192 while (1) {
193 int answer;
194 fprintf(stderr, "%s (y/n) ", question);
195
196 if ((answer = read_yes_no_answer()) >= 0)
197 return answer;
198
199 fprintf(stderr, "Sorry, I did not understand your answer. "
200 "Please type 'y' or 'n'\n");
201 }
202 }
203
204 int mingw_unlink(const char *pathname)
205 {
206 int ret, tries = 0;
207 wchar_t wpathname[MAX_PATH];
208 if (xutftowcs_path(wpathname, pathname) < 0)
209 return -1;
210
211 /* read-only files cannot be removed */
212 _wchmod(wpathname, 0666);
213 while ((ret = _wunlink(wpathname)) == -1 && tries < ARRAY_SIZE(delay)) {
214 if (!is_file_in_use_error(GetLastError()))
215 break;
216 /*
217 * We assume that some other process had the source or
218 * destination file open at the wrong moment and retry.
219 * In order to give the other process a higher chance to
220 * complete its operation, we give up our time slice now.
221 * If we have to retry again, we do sleep a bit.
222 */
223 Sleep(delay[tries]);
224 tries++;
225 }
226 while (ret == -1 && is_file_in_use_error(GetLastError()) &&
227 ask_yes_no_if_possible("Unlink of file '%s' failed. "
228 "Should I try again?", pathname))
229 ret = _wunlink(wpathname);
230 return ret;
231 }
232
233 static int is_dir_empty(const wchar_t *wpath)
234 {
235 WIN32_FIND_DATAW findbuf;
236 HANDLE handle;
237 wchar_t wbuf[MAX_PATH + 2];
238 wcscpy(wbuf, wpath);
239 wcscat(wbuf, L"\\*");
240 handle = FindFirstFileW(wbuf, &findbuf);
241 if (handle == INVALID_HANDLE_VALUE)
242 return GetLastError() == ERROR_NO_MORE_FILES;
243
244 while (!wcscmp(findbuf.cFileName, L".") ||
245 !wcscmp(findbuf.cFileName, L".."))
246 if (!FindNextFileW(handle, &findbuf))
247 return GetLastError() == ERROR_NO_MORE_FILES;
248 FindClose(handle);
249 return 0;
250 }
251
252 int mingw_rmdir(const char *pathname)
253 {
254 int ret, tries = 0;
255 wchar_t wpathname[MAX_PATH];
256 if (xutftowcs_path(wpathname, pathname) < 0)
257 return -1;
258
259 while ((ret = _wrmdir(wpathname)) == -1 && tries < ARRAY_SIZE(delay)) {
260 if (!is_file_in_use_error(GetLastError()))
261 break;
262 if (!is_dir_empty(wpathname)) {
263 errno = ENOTEMPTY;
264 break;
265 }
266 /*
267 * We assume that some other process had the source or
268 * destination file open at the wrong moment and retry.
269 * In order to give the other process a higher chance to
270 * complete its operation, we give up our time slice now.
271 * If we have to retry again, we do sleep a bit.
272 */
273 Sleep(delay[tries]);
274 tries++;
275 }
276 while (ret == -1 && is_file_in_use_error(GetLastError()) &&
277 ask_yes_no_if_possible("Deletion of directory '%s' failed. "
278 "Should I try again?", pathname))
279 ret = _wrmdir(wpathname);
280 return ret;
281 }
282
283 static int make_hidden(const wchar_t *path)
284 {
285 DWORD attribs = GetFileAttributesW(path);
286 if (SetFileAttributesW(path, FILE_ATTRIBUTE_HIDDEN | attribs))
287 return 0;
288 errno = err_win_to_posix(GetLastError());
289 return -1;
290 }
291
292 void mingw_mark_as_git_dir(const char *dir)
293 {
294 wchar_t wdir[MAX_PATH];
295 if (hide_dotfiles != HIDE_DOTFILES_FALSE && !is_bare_repository())
296 if (xutftowcs_path(wdir, dir) < 0 || make_hidden(wdir))
297 warning("Failed to make '%s' hidden", dir);
298 git_config_set("core.hideDotFiles",
299 hide_dotfiles == HIDE_DOTFILES_FALSE ? "false" :
300 (hide_dotfiles == HIDE_DOTFILES_DOTGITONLY ?
301 "dotGitOnly" : "true"));
302 }
303
304 int mingw_mkdir(const char *path, int mode)
305 {
306 int ret;
307 wchar_t wpath[MAX_PATH];
308 if (xutftowcs_path(wpath, path) < 0)
309 return -1;
310 ret = _wmkdir(wpath);
311 if (!ret && hide_dotfiles == HIDE_DOTFILES_TRUE) {
312 /*
313 * In Windows a file or dir starting with a dot is not
314 * automatically hidden. So lets mark it as hidden when
315 * such a directory is created.
316 */
317 const char *start = basename((char*)path);
318 if (*start == '.')
319 return make_hidden(wpath);
320 }
321 return ret;
322 }
323
324 int mingw_open (const char *filename, int oflags, ...)
325 {
326 va_list args;
327 unsigned mode;
328 int fd;
329 wchar_t wfilename[MAX_PATH];
330
331 va_start(args, oflags);
332 mode = va_arg(args, int);
333 va_end(args);
334
335 if (filename && !strcmp(filename, "/dev/null"))
336 filename = "nul";
337
338 if (xutftowcs_path(wfilename, filename) < 0)
339 return -1;
340 fd = _wopen(wfilename, oflags, mode);
341
342 if (fd < 0 && (oflags & O_CREAT) && errno == EACCES) {
343 DWORD attrs = GetFileAttributesW(wfilename);
344 if (attrs != INVALID_FILE_ATTRIBUTES && (attrs & FILE_ATTRIBUTE_DIRECTORY))
345 errno = EISDIR;
346 }
347 if ((oflags & O_CREAT) && fd >= 0 &&
348 hide_dotfiles == HIDE_DOTFILES_TRUE) {
349 /*
350 * In Windows a file or dir starting with a dot is not
351 * automatically hidden. So lets mark it as hidden when
352 * such a file is created.
353 */
354 const char *start = basename((char*)filename);
355 if (*start == '.' && make_hidden(wfilename))
356 warning("Could not mark '%s' as hidden.", filename);
357 }
358 return fd;
359 }
360
361 #undef write
362 ssize_t mingw_write(int fd, const void *buf, size_t count)
363 {
364 /*
365 * While write() calls to a file on a local disk are translated
366 * into WriteFile() calls with a maximum size of 64KB on Windows
367 * XP and 256KB on Vista, no such cap is placed on writes to
368 * files over the network on Windows XP. Unfortunately, there
369 * seems to be a limit of 32MB-28KB on X64 and 64MB-32KB on x86;
370 * bigger writes fail on Windows XP.
371 * So we cap to a nice 31MB here to avoid write failures over
372 * the net without changing the number of WriteFile() calls in
373 * the local case.
374 */
375 return write(fd, buf, min(count, 31 * 1024 * 1024));
376 }
377
378 FILE *mingw_fopen (const char *filename, const char *otype)
379 {
380 int hide = 0;
381 FILE *file;
382 wchar_t wfilename[MAX_PATH], wotype[4];
383 if (hide_dotfiles == HIDE_DOTFILES_TRUE &&
384 basename((char*)filename)[0] == '.')
385 hide = access(filename, F_OK);
386 if (filename && !strcmp(filename, "/dev/null"))
387 filename = "nul";
388 if (xutftowcs_path(wfilename, filename) < 0 ||
389 xutftowcs(wotype, otype, ARRAY_SIZE(wotype)) < 0)
390 return NULL;
391 file = _wfopen(wfilename, wotype);
392 if (file && hide && make_hidden(wfilename))
393 warning("Could not mark '%s' as hidden.", filename);
394 return file;
395 }
396
397 FILE *mingw_freopen (const char *filename, const char *otype, FILE *stream)
398 {
399 int hide = 0;
400 FILE *file;
401 wchar_t wfilename[MAX_PATH], wotype[4];
402 if (hide_dotfiles == HIDE_DOTFILES_TRUE &&
403 basename((char*)filename)[0] == '.')
404 hide = access(filename, F_OK);
405 if (filename && !strcmp(filename, "/dev/null"))
406 filename = "nul";
407 if (xutftowcs_path(wfilename, filename) < 0 ||
408 xutftowcs(wotype, otype, ARRAY_SIZE(wotype)) < 0)
409 return NULL;
410 file = _wfreopen(wfilename, wotype, stream);
411 if (file && hide && make_hidden(wfilename))
412 warning("Could not mark '%s' as hidden.", filename);
413 return file;
414 }
415
416 int mingw_access(const char *filename, int mode)
417 {
418 wchar_t wfilename[MAX_PATH];
419 if (xutftowcs_path(wfilename, filename) < 0)
420 return -1;
421 /* X_OK is not supported by the MSVCRT version */
422 return _waccess(wfilename, mode & ~X_OK);
423 }
424
425 int mingw_chdir(const char *dirname)
426 {
427 wchar_t wdirname[MAX_PATH];
428 if (xutftowcs_path(wdirname, dirname) < 0)
429 return -1;
430 return _wchdir(wdirname);
431 }
432
433 int mingw_chmod(const char *filename, int mode)
434 {
435 wchar_t wfilename[MAX_PATH];
436 if (xutftowcs_path(wfilename, filename) < 0)
437 return -1;
438 return _wchmod(wfilename, mode);
439 }
440
441 /*
442 * The unit of FILETIME is 100-nanoseconds since January 1, 1601, UTC.
443 * Returns the 100-nanoseconds ("hekto nanoseconds") since the epoch.
444 */
445 static inline long long filetime_to_hnsec(const FILETIME *ft)
446 {
447 long long winTime = ((long long)ft->dwHighDateTime << 32) + ft->dwLowDateTime;
448 /* Windows to Unix Epoch conversion */
449 return winTime - 116444736000000000LL;
450 }
451
452 static inline time_t filetime_to_time_t(const FILETIME *ft)
453 {
454 return (time_t)(filetime_to_hnsec(ft) / 10000000);
455 }
456
457 /* We keep the do_lstat code in a separate function to avoid recursion.
458 * When a path ends with a slash, the stat will fail with ENOENT. In
459 * this case, we strip the trailing slashes and stat again.
460 *
461 * If follow is true then act like stat() and report on the link
462 * target. Otherwise report on the link itself.
463 */
464 static int do_lstat(int follow, const char *file_name, struct stat *buf)
465 {
466 WIN32_FILE_ATTRIBUTE_DATA fdata;
467 wchar_t wfilename[MAX_PATH];
468 if (xutftowcs_path(wfilename, file_name) < 0)
469 return -1;
470
471 if (GetFileAttributesExW(wfilename, GetFileExInfoStandard, &fdata)) {
472 buf->st_ino = 0;
473 buf->st_gid = 0;
474 buf->st_uid = 0;
475 buf->st_nlink = 1;
476 buf->st_mode = file_attr_to_st_mode(fdata.dwFileAttributes);
477 buf->st_size = fdata.nFileSizeLow |
478 (((off_t)fdata.nFileSizeHigh)<<32);
479 buf->st_dev = buf->st_rdev = 0; /* not used by Git */
480 buf->st_atime = filetime_to_time_t(&(fdata.ftLastAccessTime));
481 buf->st_mtime = filetime_to_time_t(&(fdata.ftLastWriteTime));
482 buf->st_ctime = filetime_to_time_t(&(fdata.ftCreationTime));
483 if (fdata.dwFileAttributes & FILE_ATTRIBUTE_REPARSE_POINT) {
484 WIN32_FIND_DATAW findbuf;
485 HANDLE handle = FindFirstFileW(wfilename, &findbuf);
486 if (handle != INVALID_HANDLE_VALUE) {
487 if ((findbuf.dwFileAttributes & FILE_ATTRIBUTE_REPARSE_POINT) &&
488 (findbuf.dwReserved0 == IO_REPARSE_TAG_SYMLINK)) {
489 if (follow) {
490 char buffer[MAXIMUM_REPARSE_DATA_BUFFER_SIZE];
491 buf->st_size = readlink(file_name, buffer, MAXIMUM_REPARSE_DATA_BUFFER_SIZE);
492 } else {
493 buf->st_mode = S_IFLNK;
494 }
495 buf->st_mode |= S_IREAD;
496 if (!(findbuf.dwFileAttributes & FILE_ATTRIBUTE_READONLY))
497 buf->st_mode |= S_IWRITE;
498 }
499 FindClose(handle);
500 }
501 }
502 return 0;
503 }
504 switch (GetLastError()) {
505 case ERROR_ACCESS_DENIED:
506 case ERROR_SHARING_VIOLATION:
507 case ERROR_LOCK_VIOLATION:
508 case ERROR_SHARING_BUFFER_EXCEEDED:
509 errno = EACCES;
510 break;
511 case ERROR_BUFFER_OVERFLOW:
512 errno = ENAMETOOLONG;
513 break;
514 case ERROR_NOT_ENOUGH_MEMORY:
515 errno = ENOMEM;
516 break;
517 default:
518 errno = ENOENT;
519 break;
520 }
521 return -1;
522 }
523
524 /* We provide our own lstat/fstat functions, since the provided
525 * lstat/fstat functions are so slow. These stat functions are
526 * tailored for Git's usage (read: fast), and are not meant to be
527 * complete. Note that Git stat()s are redirected to mingw_lstat()
528 * too, since Windows doesn't really handle symlinks that well.
529 */
530 static int do_stat_internal(int follow, const char *file_name, struct stat *buf)
531 {
532 int namelen;
533 char alt_name[PATH_MAX];
534
535 if (!do_lstat(follow, file_name, buf))
536 return 0;
537
538 /* if file_name ended in a '/', Windows returned ENOENT;
539 * try again without trailing slashes
540 */
541 if (errno != ENOENT)
542 return -1;
543
544 namelen = strlen(file_name);
545 if (namelen && file_name[namelen-1] != '/')
546 return -1;
547 while (namelen && file_name[namelen-1] == '/')
548 --namelen;
549 if (!namelen || namelen >= PATH_MAX)
550 return -1;
551
552 memcpy(alt_name, file_name, namelen);
553 alt_name[namelen] = 0;
554 return do_lstat(follow, alt_name, buf);
555 }
556
557 int mingw_lstat(const char *file_name, struct stat *buf)
558 {
559 return do_stat_internal(0, file_name, buf);
560 }
561 int mingw_stat(const char *file_name, struct stat *buf)
562 {
563 return do_stat_internal(1, file_name, buf);
564 }
565
566 #undef fstat
567 int mingw_fstat(int fd, struct stat *buf)
568 {
569 HANDLE fh = (HANDLE)_get_osfhandle(fd);
570 BY_HANDLE_FILE_INFORMATION fdata;
571
572 if (fh == INVALID_HANDLE_VALUE) {
573 errno = EBADF;
574 return -1;
575 }
576 /* direct non-file handles to MS's fstat() */
577 if (GetFileType(fh) != FILE_TYPE_DISK)
578 return _fstati64(fd, buf);
579
580 if (GetFileInformationByHandle(fh, &fdata)) {
581 buf->st_ino = 0;
582 buf->st_gid = 0;
583 buf->st_uid = 0;
584 buf->st_nlink = 1;
585 buf->st_mode = file_attr_to_st_mode(fdata.dwFileAttributes);
586 buf->st_size = fdata.nFileSizeLow |
587 (((off_t)fdata.nFileSizeHigh)<<32);
588 buf->st_dev = buf->st_rdev = 0; /* not used by Git */
589 buf->st_atime = filetime_to_time_t(&(fdata.ftLastAccessTime));
590 buf->st_mtime = filetime_to_time_t(&(fdata.ftLastWriteTime));
591 buf->st_ctime = filetime_to_time_t(&(fdata.ftCreationTime));
592 return 0;
593 }
594 errno = EBADF;
595 return -1;
596 }
597
598 static inline void time_t_to_filetime(time_t t, FILETIME *ft)
599 {
600 long long winTime = t * 10000000LL + 116444736000000000LL;
601 ft->dwLowDateTime = winTime;
602 ft->dwHighDateTime = winTime >> 32;
603 }
604
605 int mingw_utime (const char *file_name, const struct utimbuf *times)
606 {
607 FILETIME mft, aft;
608 int fh, rc;
609 DWORD attrs;
610 wchar_t wfilename[MAX_PATH];
611 if (xutftowcs_path(wfilename, file_name) < 0)
612 return -1;
613
614 /* must have write permission */
615 attrs = GetFileAttributesW(wfilename);
616 if (attrs != INVALID_FILE_ATTRIBUTES &&
617 (attrs & FILE_ATTRIBUTE_READONLY)) {
618 /* ignore errors here; open() will report them */
619 SetFileAttributesW(wfilename, attrs & ~FILE_ATTRIBUTE_READONLY);
620 }
621
622 if ((fh = _wopen(wfilename, O_RDWR | O_BINARY)) < 0) {
623 rc = -1;
624 goto revert_attrs;
625 }
626
627 if (times) {
628 time_t_to_filetime(times->modtime, &mft);
629 time_t_to_filetime(times->actime, &aft);
630 } else {
631 GetSystemTimeAsFileTime(&mft);
632 aft = mft;
633 }
634 if (!SetFileTime((HANDLE)_get_osfhandle(fh), NULL, &aft, &mft)) {
635 errno = EINVAL;
636 rc = -1;
637 } else
638 rc = 0;
639 close(fh);
640
641 revert_attrs:
642 if (attrs != INVALID_FILE_ATTRIBUTES &&
643 (attrs & FILE_ATTRIBUTE_READONLY)) {
644 /* ignore errors again */
645 SetFileAttributesW(wfilename, attrs);
646 }
647 return rc;
648 }
649
650 unsigned int sleep (unsigned int seconds)
651 {
652 Sleep(seconds*1000);
653 return 0;
654 }
655
656 char *mingw_mktemp(char *template)
657 {
658 wchar_t wtemplate[MAX_PATH];
659 if (xutftowcs_path(wtemplate, template) < 0)
660 return NULL;
661 if (!_wmktemp(wtemplate))
662 return NULL;
663 if (xwcstoutf(template, wtemplate, strlen(template) + 1) < 0)
664 return NULL;
665 return template;
666 }
667
668 int mkstemp(char *template)
669 {
670 char *filename = mktemp(template);
671 if (filename == NULL)
672 return -1;
673 return open(filename, O_RDWR | O_CREAT, 0600);
674 }
675
676 int gettimeofday(struct timeval *tv, void *tz)
677 {
678 FILETIME ft;
679 long long hnsec;
680
681 GetSystemTimeAsFileTime(&ft);
682 hnsec = filetime_to_hnsec(&ft);
683 tv->tv_sec = hnsec / 10000000;
684 tv->tv_usec = (hnsec % 10000000) / 10;
685 return 0;
686 }
687
688 int pipe(int filedes[2])
689 {
690 HANDLE h[2];
691
692 /* this creates non-inheritable handles */
693 if (!CreatePipe(&h[0], &h[1], NULL, 8192)) {
694 errno = err_win_to_posix(GetLastError());
695 return -1;
696 }
697 filedes[0] = _open_osfhandle((int)h[0], O_NOINHERIT);
698 if (filedes[0] < 0) {
699 CloseHandle(h[0]);
700 CloseHandle(h[1]);
701 return -1;
702 }
703 filedes[1] = _open_osfhandle((int)h[1], O_NOINHERIT);
704 if (filedes[0] < 0) {
705 close(filedes[0]);
706 CloseHandle(h[1]);
707 return -1;
708 }
709 return 0;
710 }
711
712 struct tm *gmtime_r(const time_t *timep, struct tm *result)
713 {
714 /* gmtime() in MSVCRT.DLL is thread-safe, but not reentrant */
715 memcpy(result, gmtime(timep), sizeof(struct tm));
716 return result;
717 }
718
719 struct tm *localtime_r(const time_t *timep, struct tm *result)
720 {
721 /* localtime() in MSVCRT.DLL is thread-safe, but not reentrant */
722 memcpy(result, localtime(timep), sizeof(struct tm));
723 return result;
724 }
725
726 char *mingw_getcwd(char *pointer, int len)
727 {
728 int i;
729 wchar_t wpointer[MAX_PATH];
730 if (!_wgetcwd(wpointer, ARRAY_SIZE(wpointer)))
731 return NULL;
732 if (xwcstoutf(pointer, wpointer, len) < 0)
733 return NULL;
734 for (i = 0; pointer[i]; i++)
735 if (pointer[i] == '\\')
736 pointer[i] = '/';
737 return pointer;
738 }
739
740 #undef getenv
741 char *mingw_getenv(const char *name)
742 {
743 char *result = getenv(name);
744 if (!result && !strcmp(name, "TMPDIR")) {
745 /* on Windows it is TMP and TEMP */
746 result = getenv("TMP");
747 if (!result)
748 result = getenv("TEMP");
749 }
750 else if (!result && !strcmp(name, "TERM")) {
751 /* simulate TERM to enable auto-color (see color.c) */
752 result = "winansi";
753 }
754 return result;
755 }
756
757 /*
758 * See http://msdn2.microsoft.com/en-us/library/17w5ykft(vs.71).aspx
759 * (Parsing C++ Command-Line Arguments)
760 */
761 static const char *quote_arg(const char *arg)
762 {
763 /* count chars to quote */
764 int len = 0, n = 0;
765 int force_quotes = 0;
766 char *q, *d;
767 const char *p = arg;
768 if (!*p) force_quotes = 1;
769 while (*p) {
770 if (isspace(*p) || *p == '*' || *p == '?' || *p == '{' || *p == '\'')
771 force_quotes = 1;
772 else if (*p == '"')
773 n++;
774 else if (*p == '\\') {
775 int count = 0;
776 while (*p == '\\') {
777 count++;
778 p++;
779 len++;
780 }
781 if (*p == '"')
782 n += count*2 + 1;
783 continue;
784 }
785 len++;
786 p++;
787 }
788 if (!force_quotes && n == 0)
789 return arg;
790
791 /* insert \ where necessary */
792 d = q = xmalloc(len+n+3);
793 *d++ = '"';
794 while (*arg) {
795 if (*arg == '"')
796 *d++ = '\\';
797 else if (*arg == '\\') {
798 int count = 0;
799 while (*arg == '\\') {
800 count++;
801 *d++ = *arg++;
802 }
803 if (*arg == '"') {
804 while (count-- > 0)
805 *d++ = '\\';
806 *d++ = '\\';
807 }
808 }
809 *d++ = *arg++;
810 }
811 *d++ = '"';
812 *d++ = 0;
813 return q;
814 }
815
816 static const char *parse_interpreter(const char *cmd)
817 {
818 static char buf[100];
819 char *p, *opt;
820 int n, fd;
821
822 /* don't even try a .exe */
823 n = strlen(cmd);
824 if (n >= 4 && !strcasecmp(cmd+n-4, ".exe"))
825 return NULL;
826
827 fd = open(cmd, O_RDONLY);
828 if (fd < 0)
829 return NULL;
830 n = read(fd, buf, sizeof(buf)-1);
831 close(fd);
832 if (n < 4) /* at least '#!/x' and not error */
833 return NULL;
834
835 if (buf[0] != '#' || buf[1] != '!')
836 return NULL;
837 buf[n] = '\0';
838 p = buf + strcspn(buf, "\r\n");
839 if (!*p)
840 return NULL;
841
842 *p = '\0';
843 if (!(p = strrchr(buf+2, '/')) && !(p = strrchr(buf+2, '\\')))
844 return NULL;
845 /* strip options */
846 if ((opt = strchr(p+1, ' ')))
847 *opt = '\0';
848 return p+1;
849 }
850
851 /*
852 * Splits the PATH into parts.
853 */
854 static char **get_path_split(void)
855 {
856 char *p, **path, *envpath = getenv("PATH");
857 int i, n = 0;
858
859 if (!envpath || !*envpath)
860 return NULL;
861
862 envpath = xstrdup(envpath);
863 p = envpath;
864 while (p) {
865 char *dir = p;
866 p = strchr(p, ';');
867 if (p) *p++ = '\0';
868 if (*dir) { /* not earlier, catches series of ; */
869 ++n;
870 }
871 }
872 if (!n)
873 return NULL;
874
875 path = xmalloc((n+1)*sizeof(char *));
876 p = envpath;
877 i = 0;
878 do {
879 if (*p)
880 path[i++] = xstrdup(p);
881 p = p+strlen(p)+1;
882 } while (i < n);
883 path[i] = NULL;
884
885 free(envpath);
886
887 return path;
888 }
889
890 static void free_path_split(char **path)
891 {
892 char **p = path;
893
894 if (!path)
895 return;
896
897 while (*p)
898 free(*p++);
899 free(path);
900 }
901
902 /*
903 * exe_only means that we only want to detect .exe files, but not scripts
904 * (which do not have an extension)
905 */
906 static char *lookup_prog(const char *dir, const char *cmd, int isexe, int exe_only)
907 {
908 char path[MAX_PATH];
909 wchar_t wpath[MAX_PATH];
910 snprintf(path, sizeof(path), "%s\\%s.exe", dir, cmd);
911
912 if (xutftowcs_path(wpath, path) < 0)
913 return NULL;
914
915 if (!isexe && _waccess(wpath, F_OK) == 0)
916 return xstrdup(path);
917 path[strlen(path)-4] = '\0';
918 if ((!exe_only || isexe) && _waccess(wpath, F_OK) == 0) {
919
920 if (!(GetFileAttributesW(wpath) & FILE_ATTRIBUTE_DIRECTORY))
921 return xstrdup(path);
922 }
923 return NULL;
924 }
925
926 /*
927 * Determines the absolute path of cmd using the split path in path.
928 * If cmd contains a slash or backslash, no lookup is performed.
929 */
930 static char *path_lookup(const char *cmd, char **path, int exe_only)
931 {
932 char *prog = NULL;
933 int len = strlen(cmd);
934 int isexe = len >= 4 && !strcasecmp(cmd+len-4, ".exe");
935
936 if (strchr(cmd, '/') || strchr(cmd, '\\'))
937 prog = xstrdup(cmd);
938
939 while (!prog && *path)
940 prog = lookup_prog(*path++, cmd, isexe, exe_only);
941
942 return prog;
943 }
944
945 static int env_compare(const void *a, const void *b)
946 {
947 char *const *ea = a;
948 char *const *eb = b;
949 return strcasecmp(*ea, *eb);
950 }
951
952 struct pinfo_t {
953 struct pinfo_t *next;
954 pid_t pid;
955 HANDLE proc;
956 } pinfo_t;
957 struct pinfo_t *pinfo = NULL;
958 CRITICAL_SECTION pinfo_cs;
959
960 static pid_t mingw_spawnve_fd(const char *cmd, const char **argv, char **env,
961 const char *dir,
962 int prepend_cmd, int fhin, int fhout, int fherr)
963 {
964 STARTUPINFOW si;
965 PROCESS_INFORMATION pi;
966 struct strbuf envblk, args;
967 wchar_t wcmd[MAX_PATH], wdir[MAX_PATH], *wargs;
968 unsigned flags;
969 BOOL ret;
970
971 /* Determine whether or not we are associated to a console */
972 HANDLE cons = CreateFile("CONOUT$", GENERIC_WRITE,
973 FILE_SHARE_WRITE, NULL, OPEN_EXISTING,
974 FILE_ATTRIBUTE_NORMAL, NULL);
975 if (cons == INVALID_HANDLE_VALUE) {
976 /* There is no console associated with this process.
977 * Since the child is a console process, Windows
978 * would normally create a console window. But
979 * since we'll be redirecting std streams, we do
980 * not need the console.
981 * It is necessary to use DETACHED_PROCESS
982 * instead of CREATE_NO_WINDOW to make ssh
983 * recognize that it has no console.
984 */
985 flags = DETACHED_PROCESS;
986 } else {
987 /* There is already a console. If we specified
988 * DETACHED_PROCESS here, too, Windows would
989 * disassociate the child from the console.
990 * The same is true for CREATE_NO_WINDOW.
991 * Go figure!
992 */
993 flags = 0;
994 CloseHandle(cons);
995 }
996 memset(&si, 0, sizeof(si));
997 si.cb = sizeof(si);
998 si.dwFlags = STARTF_USESTDHANDLES;
999 si.hStdInput = winansi_get_osfhandle(fhin);
1000 si.hStdOutput = winansi_get_osfhandle(fhout);
1001 si.hStdError = winansi_get_osfhandle(fherr);
1002
1003 if (xutftowcs_path(wcmd, cmd) < 0)
1004 return -1;
1005 if (dir && xutftowcs_path(wdir, dir) < 0)
1006 return -1;
1007
1008 /* concatenate argv, quoting args as we go */
1009 strbuf_init(&args, 0);
1010 if (prepend_cmd) {
1011 char *quoted = (char *)quote_arg(cmd);
1012 strbuf_addstr(&args, quoted);
1013 if (quoted != cmd)
1014 free(quoted);
1015 }
1016 for (; *argv; argv++) {
1017 char *quoted = (char *)quote_arg(*argv);
1018 if (*args.buf)
1019 strbuf_addch(&args, ' ');
1020 strbuf_addstr(&args, quoted);
1021 if (quoted != *argv)
1022 free(quoted);
1023 }
1024
1025 wargs = xmalloc((2 * args.len + 1) * sizeof(wchar_t));
1026 xutftowcs(wargs, args.buf, 2 * args.len + 1);
1027 strbuf_release(&args);
1028
1029 if (env) {
1030 int count = 0;
1031 char **e, **sorted_env;
1032
1033 for (e = env; *e; e++)
1034 count++;
1035
1036 /* environment must be sorted */
1037 sorted_env = xmalloc(sizeof(*sorted_env) * (count + 1));
1038 memcpy(sorted_env, env, sizeof(*sorted_env) * (count + 1));
1039 qsort(sorted_env, count, sizeof(*sorted_env), env_compare);
1040
1041 strbuf_init(&envblk, 0);
1042 for (e = sorted_env; *e; e++) {
1043 strbuf_addstr(&envblk, *e);
1044 strbuf_addch(&envblk, '\0');
1045 }
1046 free(sorted_env);
1047 }
1048
1049 memset(&pi, 0, sizeof(pi));
1050 ret = CreateProcessW(wcmd, wargs, NULL, NULL, TRUE, flags,
1051 env ? envblk.buf : NULL, dir ? wdir : NULL, &si, &pi);
1052
1053 if (env)
1054 strbuf_release(&envblk);
1055 free(wargs);
1056
1057 if (!ret) {
1058 errno = ENOENT;
1059 return -1;
1060 }
1061 CloseHandle(pi.hThread);
1062
1063 /*
1064 * The process ID is the human-readable identifier of the process
1065 * that we want to present in log and error messages. The handle
1066 * is not useful for this purpose. But we cannot close it, either,
1067 * because it is not possible to turn a process ID into a process
1068 * handle after the process terminated.
1069 * Keep the handle in a list for waitpid.
1070 */
1071 EnterCriticalSection(&pinfo_cs);
1072 {
1073 struct pinfo_t *info = xmalloc(sizeof(struct pinfo_t));
1074 info->pid = pi.dwProcessId;
1075 info->proc = pi.hProcess;
1076 info->next = pinfo;
1077 pinfo = info;
1078 }
1079 LeaveCriticalSection(&pinfo_cs);
1080
1081 return (pid_t)pi.dwProcessId;
1082 }
1083
1084 static pid_t mingw_spawnve(const char *cmd, const char **argv, char **env,
1085 int prepend_cmd)
1086 {
1087 return mingw_spawnve_fd(cmd, argv, env, NULL, prepend_cmd, 0, 1, 2);
1088 }
1089
1090 pid_t mingw_spawnvpe(const char *cmd, const char **argv, char **env,
1091 const char *dir,
1092 int fhin, int fhout, int fherr)
1093 {
1094 pid_t pid;
1095 char **path = get_path_split();
1096 char *prog = path_lookup(cmd, path, 0);
1097
1098 if (!prog) {
1099 errno = ENOENT;
1100 pid = -1;
1101 }
1102 else {
1103 const char *interpr = parse_interpreter(prog);
1104
1105 if (interpr) {
1106 const char *argv0 = argv[0];
1107 char *iprog = path_lookup(interpr, path, 1);
1108 argv[0] = prog;
1109 if (!iprog) {
1110 errno = ENOENT;
1111 pid = -1;
1112 }
1113 else {
1114 pid = mingw_spawnve_fd(iprog, argv, env, dir, 1,
1115 fhin, fhout, fherr);
1116 free(iprog);
1117 }
1118 argv[0] = argv0;
1119 }
1120 else
1121 pid = mingw_spawnve_fd(prog, argv, env, dir, 0,
1122 fhin, fhout, fherr);
1123 free(prog);
1124 }
1125 free_path_split(path);
1126 return pid;
1127 }
1128
1129 static int try_shell_exec(const char *cmd, char *const *argv, char **env)
1130 {
1131 const char *interpr = parse_interpreter(cmd);
1132 char **path;
1133 char *prog;
1134 int pid = 0;
1135
1136 if (!interpr)
1137 return 0;
1138 path = get_path_split();
1139 prog = path_lookup(interpr, path, 1);
1140 if (prog) {
1141 int argc = 0;
1142 const char **argv2;
1143 while (argv[argc]) argc++;
1144 argv2 = xmalloc(sizeof(*argv) * (argc+1));
1145 argv2[0] = (char *)cmd; /* full path to the script file */
1146 memcpy(&argv2[1], &argv[1], sizeof(*argv) * argc);
1147 pid = mingw_spawnve(prog, argv2, env, 1);
1148 if (pid >= 0) {
1149 int status;
1150 if (waitpid(pid, &status, 0) < 0)
1151 status = 255;
1152 exit(status);
1153 }
1154 pid = 1; /* indicate that we tried but failed */
1155 free(prog);
1156 free(argv2);
1157 }
1158 free_path_split(path);
1159 return pid;
1160 }
1161
1162 static void mingw_execve(const char *cmd, char *const *argv, char *const *env)
1163 {
1164 /* check if git_command is a shell script */
1165 if (!try_shell_exec(cmd, argv, (char **)env)) {
1166 int pid, status;
1167
1168 pid = mingw_spawnve(cmd, (const char **)argv, (char **)env, 0);
1169 if (pid < 0)
1170 return;
1171 if (waitpid(pid, &status, 0) < 0)
1172 status = 255;
1173 exit(status);
1174 }
1175 }
1176
1177 int mingw_execvp(const char *cmd, char *const *argv)
1178 {
1179 char **path = get_path_split();
1180 char *prog = path_lookup(cmd, path, 0);
1181
1182 if (prog) {
1183 mingw_execve(prog, argv, environ);
1184 free(prog);
1185 } else
1186 errno = ENOENT;
1187
1188 free_path_split(path);
1189 return -1;
1190 }
1191
1192 int mingw_execv(const char *cmd, char *const *argv)
1193 {
1194 mingw_execve(cmd, argv, environ);
1195 return -1;
1196 }
1197
1198 int mingw_kill(pid_t pid, int sig)
1199 {
1200 if (pid > 0 && sig == SIGTERM) {
1201 HANDLE h = OpenProcess(PROCESS_TERMINATE, FALSE, pid);
1202
1203 if (TerminateProcess(h, -1)) {
1204 CloseHandle(h);
1205 return 0;
1206 }
1207
1208 errno = err_win_to_posix(GetLastError());
1209 CloseHandle(h);
1210 return -1;
1211 }
1212
1213 errno = EINVAL;
1214 return -1;
1215 }
1216
1217 static char **copy_environ(void)
1218 {
1219 char **env;
1220 int i = 0;
1221 while (environ[i])
1222 i++;
1223 env = xmalloc((i+1)*sizeof(*env));
1224 for (i = 0; environ[i]; i++)
1225 env[i] = xstrdup(environ[i]);
1226 env[i] = NULL;
1227 return env;
1228 }
1229
1230 void free_environ(char **env)
1231 {
1232 int i;
1233 for (i = 0; env[i]; i++)
1234 free(env[i]);
1235 free(env);
1236 }
1237
1238 static int lookup_env(char **env, const char *name, size_t nmln)
1239 {
1240 int i;
1241
1242 for (i = 0; env[i]; i++) {
1243 if (0 == strncmp(env[i], name, nmln)
1244 && '=' == env[i][nmln])
1245 /* matches */
1246 return i;
1247 }
1248 return -1;
1249 }
1250
1251 /*
1252 * If name contains '=', then sets the variable, otherwise it unsets it
1253 */
1254 static char **env_setenv(char **env, const char *name)
1255 {
1256 char *eq = strchrnul(name, '=');
1257 int i = lookup_env(env, name, eq-name);
1258
1259 if (i < 0) {
1260 if (*eq) {
1261 for (i = 0; env[i]; i++)
1262 ;
1263 env = xrealloc(env, (i+2)*sizeof(*env));
1264 env[i] = xstrdup(name);
1265 env[i+1] = NULL;
1266 }
1267 }
1268 else {
1269 free(env[i]);
1270 if (*eq)
1271 env[i] = xstrdup(name);
1272 else
1273 for (; env[i]; i++)
1274 env[i] = env[i+1];
1275 }
1276 return env;
1277 }
1278
1279 /*
1280 * Copies global environ and adjusts variables as specified by vars.
1281 */
1282 char **make_augmented_environ(const char *const *vars)
1283 {
1284 char **env = copy_environ();
1285
1286 while (*vars)
1287 env = env_setenv(env, *vars++);
1288 return env;
1289 }
1290
1291 /*
1292 * Note, this isn't a complete replacement for getaddrinfo. It assumes
1293 * that service contains a numerical port, or that it is null. It
1294 * does a simple search using gethostbyname, and returns one IPv4 host
1295 * if one was found.
1296 */
1297 static int WSAAPI getaddrinfo_stub(const char *node, const char *service,
1298 const struct addrinfo *hints,
1299 struct addrinfo **res)
1300 {
1301 struct hostent *h = NULL;
1302 struct addrinfo *ai;
1303 struct sockaddr_in *sin;
1304
1305 if (node) {
1306 h = gethostbyname(node);
1307 if (!h)
1308 return WSAGetLastError();
1309 }
1310
1311 ai = xmalloc(sizeof(struct addrinfo));
1312 *res = ai;
1313 ai->ai_flags = 0;
1314 ai->ai_family = AF_INET;
1315 ai->ai_socktype = hints ? hints->ai_socktype : 0;
1316 switch (ai->ai_socktype) {
1317 case SOCK_STREAM:
1318 ai->ai_protocol = IPPROTO_TCP;
1319 break;
1320 case SOCK_DGRAM:
1321 ai->ai_protocol = IPPROTO_UDP;
1322 break;
1323 default:
1324 ai->ai_protocol = 0;
1325 break;
1326 }
1327 ai->ai_addrlen = sizeof(struct sockaddr_in);
1328 if (hints && (hints->ai_flags & AI_CANONNAME))
1329 ai->ai_canonname = h ? xstrdup(h->h_name) : NULL;
1330 else
1331 ai->ai_canonname = NULL;
1332
1333 sin = xmalloc(ai->ai_addrlen);
1334 memset(sin, 0, ai->ai_addrlen);
1335 sin->sin_family = AF_INET;
1336 /* Note: getaddrinfo is supposed to allow service to be a string,
1337 * which should be looked up using getservbyname. This is
1338 * currently not implemented */
1339 if (service)
1340 sin->sin_port = htons(atoi(service));
1341 if (h)
1342 sin->sin_addr = *(struct in_addr *)h->h_addr;
1343 else if (hints && (hints->ai_flags & AI_PASSIVE))
1344 sin->sin_addr.s_addr = INADDR_ANY;
1345 else
1346 sin->sin_addr.s_addr = INADDR_LOOPBACK;
1347 ai->ai_addr = (struct sockaddr *)sin;
1348 ai->ai_next = 0;
1349 return 0;
1350 }
1351
1352 static void WSAAPI freeaddrinfo_stub(struct addrinfo *res)
1353 {
1354 free(res->ai_canonname);
1355 free(res->ai_addr);
1356 free(res);
1357 }
1358
1359 static int WSAAPI getnameinfo_stub(const struct sockaddr *sa, socklen_t salen,
1360 char *host, DWORD hostlen,
1361 char *serv, DWORD servlen, int flags)
1362 {
1363 const struct sockaddr_in *sin = (const struct sockaddr_in *)sa;
1364 if (sa->sa_family != AF_INET)
1365 return EAI_FAMILY;
1366 if (!host && !serv)
1367 return EAI_NONAME;
1368
1369 if (host && hostlen > 0) {
1370 struct hostent *ent = NULL;
1371 if (!(flags & NI_NUMERICHOST))
1372 ent = gethostbyaddr((const char *)&sin->sin_addr,
1373 sizeof(sin->sin_addr), AF_INET);
1374
1375 if (ent)
1376 snprintf(host, hostlen, "%s", ent->h_name);
1377 else if (flags & NI_NAMEREQD)
1378 return EAI_NONAME;
1379 else
1380 snprintf(host, hostlen, "%s", inet_ntoa(sin->sin_addr));
1381 }
1382
1383 if (serv && servlen > 0) {
1384 struct servent *ent = NULL;
1385 if (!(flags & NI_NUMERICSERV))
1386 ent = getservbyport(sin->sin_port,
1387 flags & NI_DGRAM ? "udp" : "tcp");
1388
1389 if (ent)
1390 snprintf(serv, servlen, "%s", ent->s_name);
1391 else
1392 snprintf(serv, servlen, "%d", ntohs(sin->sin_port));
1393 }
1394
1395 return 0;
1396 }
1397
1398 static HMODULE ipv6_dll = NULL;
1399 static void (WSAAPI *ipv6_freeaddrinfo)(struct addrinfo *res);
1400 static int (WSAAPI *ipv6_getaddrinfo)(const char *node, const char *service,
1401 const struct addrinfo *hints,
1402 struct addrinfo **res);
1403 static int (WSAAPI *ipv6_getnameinfo)(const struct sockaddr *sa, socklen_t salen,
1404 char *host, DWORD hostlen,
1405 char *serv, DWORD servlen, int flags);
1406 /*
1407 * gai_strerror is an inline function in the ws2tcpip.h header, so we
1408 * don't need to try to load that one dynamically.
1409 */
1410
1411 static void socket_cleanup(void)
1412 {
1413 WSACleanup();
1414 if (ipv6_dll)
1415 FreeLibrary(ipv6_dll);
1416 ipv6_dll = NULL;
1417 ipv6_freeaddrinfo = freeaddrinfo_stub;
1418 ipv6_getaddrinfo = getaddrinfo_stub;
1419 ipv6_getnameinfo = getnameinfo_stub;
1420 }
1421
1422 static void ensure_socket_initialization(void)
1423 {
1424 WSADATA wsa;
1425 static int initialized = 0;
1426 const char *libraries[] = { "ws2_32.dll", "wship6.dll", NULL };
1427 const char **name;
1428
1429 if (initialized)
1430 return;
1431
1432 if (WSAStartup(MAKEWORD(2,2), &wsa))
1433 die("unable to initialize winsock subsystem, error %d",
1434 WSAGetLastError());
1435
1436 for (name = libraries; *name; name++) {
1437 ipv6_dll = LoadLibrary(*name);
1438 if (!ipv6_dll)
1439 continue;
1440
1441 ipv6_freeaddrinfo = (void (WSAAPI *)(struct addrinfo *))
1442 GetProcAddress(ipv6_dll, "freeaddrinfo");
1443 ipv6_getaddrinfo = (int (WSAAPI *)(const char *, const char *,
1444 const struct addrinfo *,
1445 struct addrinfo **))
1446 GetProcAddress(ipv6_dll, "getaddrinfo");
1447 ipv6_getnameinfo = (int (WSAAPI *)(const struct sockaddr *,
1448 socklen_t, char *, DWORD,
1449 char *, DWORD, int))
1450 GetProcAddress(ipv6_dll, "getnameinfo");
1451 if (!ipv6_freeaddrinfo || !ipv6_getaddrinfo || !ipv6_getnameinfo) {
1452 FreeLibrary(ipv6_dll);
1453 ipv6_dll = NULL;
1454 } else
1455 break;
1456 }
1457 if (!ipv6_freeaddrinfo || !ipv6_getaddrinfo || !ipv6_getnameinfo) {
1458 ipv6_freeaddrinfo = freeaddrinfo_stub;
1459 ipv6_getaddrinfo = getaddrinfo_stub;
1460 ipv6_getnameinfo = getnameinfo_stub;
1461 }
1462
1463 atexit(socket_cleanup);
1464 initialized = 1;
1465 }
1466
1467 #undef gethostname
1468 int mingw_gethostname(char *name, int namelen)
1469 {
1470 ensure_socket_initialization();
1471 return gethostname(name, namelen);
1472 }
1473
1474 #undef gethostbyname
1475 struct hostent *mingw_gethostbyname(const char *host)
1476 {
1477 ensure_socket_initialization();
1478 return gethostbyname(host);
1479 }
1480
1481 void mingw_freeaddrinfo(struct addrinfo *res)
1482 {
1483 ipv6_freeaddrinfo(res);
1484 }
1485
1486 int mingw_getaddrinfo(const char *node, const char *service,
1487 const struct addrinfo *hints, struct addrinfo **res)
1488 {
1489 ensure_socket_initialization();
1490 return ipv6_getaddrinfo(node, service, hints, res);
1491 }
1492
1493 int mingw_getnameinfo(const struct sockaddr *sa, socklen_t salen,
1494 char *host, DWORD hostlen, char *serv, DWORD servlen,
1495 int flags)
1496 {
1497 ensure_socket_initialization();
1498 return ipv6_getnameinfo(sa, salen, host, hostlen, serv, servlen, flags);
1499 }
1500
1501 int mingw_socket(int domain, int type, int protocol)
1502 {
1503 int sockfd;
1504 SOCKET s;
1505
1506 ensure_socket_initialization();
1507 s = WSASocket(domain, type, protocol, NULL, 0, 0);
1508 if (s == INVALID_SOCKET) {
1509 /*
1510 * WSAGetLastError() values are regular BSD error codes
1511 * biased by WSABASEERR.
1512 * However, strerror() does not know about networking
1513 * specific errors, which are values beginning at 38 or so.
1514 * Therefore, we choose to leave the biased error code
1515 * in errno so that _if_ someone looks up the code somewhere,
1516 * then it is at least the number that are usually listed.
1517 */
1518 errno = WSAGetLastError();
1519 return -1;
1520 }
1521 /* convert into a file descriptor */
1522 if ((sockfd = _open_osfhandle(s, O_RDWR|O_BINARY)) < 0) {
1523 closesocket(s);
1524 return error("unable to make a socket file descriptor: %s",
1525 strerror(errno));
1526 }
1527 return sockfd;
1528 }
1529
1530 #undef connect
1531 int mingw_connect(int sockfd, struct sockaddr *sa, size_t sz)
1532 {
1533 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
1534 return connect(s, sa, sz);
1535 }
1536
1537 #undef bind
1538 int mingw_bind(int sockfd, struct sockaddr *sa, size_t sz)
1539 {
1540 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
1541 return bind(s, sa, sz);
1542 }
1543
1544 #undef setsockopt
1545 int mingw_setsockopt(int sockfd, int lvl, int optname, void *optval, int optlen)
1546 {
1547 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
1548 return setsockopt(s, lvl, optname, (const char*)optval, optlen);
1549 }
1550
1551 #undef shutdown
1552 int mingw_shutdown(int sockfd, int how)
1553 {
1554 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
1555 return shutdown(s, how);
1556 }
1557
1558 #undef listen
1559 int mingw_listen(int sockfd, int backlog)
1560 {
1561 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
1562 return listen(s, backlog);
1563 }
1564
1565 #undef accept
1566 int mingw_accept(int sockfd1, struct sockaddr *sa, socklen_t *sz)
1567 {
1568 int sockfd2;
1569
1570 SOCKET s1 = (SOCKET)_get_osfhandle(sockfd1);
1571 SOCKET s2 = accept(s1, sa, sz);
1572
1573 /* convert into a file descriptor */
1574 if ((sockfd2 = _open_osfhandle(s2, O_RDWR|O_BINARY)) < 0) {
1575 int err = errno;
1576 closesocket(s2);
1577 return error("unable to make a socket file descriptor: %s",
1578 strerror(err));
1579 }
1580 return sockfd2;
1581 }
1582
1583 #undef rename
1584 int mingw_rename(const char *pold, const char *pnew)
1585 {
1586 DWORD attrs, gle;
1587 int tries = 0;
1588 wchar_t wpold[MAX_PATH], wpnew[MAX_PATH];
1589 if (xutftowcs_path(wpold, pold) < 0 || xutftowcs_path(wpnew, pnew) < 0)
1590 return -1;
1591
1592 /*
1593 * Try native rename() first to get errno right.
1594 * It is based on MoveFile(), which cannot overwrite existing files.
1595 */
1596 if (!_wrename(wpold, wpnew))
1597 return 0;
1598 if (errno != EEXIST)
1599 return -1;
1600 repeat:
1601 if (MoveFileExW(wpold, wpnew, MOVEFILE_REPLACE_EXISTING))
1602 return 0;
1603 /* TODO: translate more errors */
1604 gle = GetLastError();
1605 if (gle == ERROR_ACCESS_DENIED &&
1606 (attrs = GetFileAttributesW(wpnew)) != INVALID_FILE_ATTRIBUTES) {
1607 if (attrs & FILE_ATTRIBUTE_DIRECTORY) {
1608 errno = EISDIR;
1609 return -1;
1610 }
1611 if ((attrs & FILE_ATTRIBUTE_READONLY) &&
1612 SetFileAttributesW(wpnew, attrs & ~FILE_ATTRIBUTE_READONLY)) {
1613 if (MoveFileExW(wpold, wpnew, MOVEFILE_REPLACE_EXISTING))
1614 return 0;
1615 gle = GetLastError();
1616 /* revert file attributes on failure */
1617 SetFileAttributesW(wpnew, attrs);
1618 }
1619 }
1620 if (tries < ARRAY_SIZE(delay) && gle == ERROR_ACCESS_DENIED) {
1621 /*
1622 * We assume that some other process had the source or
1623 * destination file open at the wrong moment and retry.
1624 * In order to give the other process a higher chance to
1625 * complete its operation, we give up our time slice now.
1626 * If we have to retry again, we do sleep a bit.
1627 */
1628 Sleep(delay[tries]);
1629 tries++;
1630 goto repeat;
1631 }
1632 if (gle == ERROR_ACCESS_DENIED &&
1633 ask_yes_no_if_possible("Rename from '%s' to '%s' failed. "
1634 "Should I try again?", pold, pnew))
1635 goto repeat;
1636
1637 errno = EACCES;
1638 return -1;
1639 }
1640
1641 /*
1642 * Note that this doesn't return the actual pagesize, but
1643 * the allocation granularity. If future Windows specific git code
1644 * needs the real getpagesize function, we need to find another solution.
1645 */
1646 int mingw_getpagesize(void)
1647 {
1648 SYSTEM_INFO si;
1649 GetSystemInfo(&si);
1650 return si.dwAllocationGranularity;
1651 }
1652
1653 struct passwd *getpwuid(int uid)
1654 {
1655 static char user_name[100];
1656 static struct passwd p;
1657
1658 DWORD len = sizeof(user_name);
1659 if (!GetUserName(user_name, &len))
1660 return NULL;
1661 p.pw_name = user_name;
1662 p.pw_gecos = "unknown";
1663 p.pw_dir = NULL;
1664 return &p;
1665 }
1666
1667 static HANDLE timer_event;
1668 static HANDLE timer_thread;
1669 static int timer_interval;
1670 static int one_shot;
1671 static sig_handler_t timer_fn = SIG_DFL;
1672
1673 /* The timer works like this:
1674 * The thread, ticktack(), is a trivial routine that most of the time
1675 * only waits to receive the signal to terminate. The main thread tells
1676 * the thread to terminate by setting the timer_event to the signalled
1677 * state.
1678 * But ticktack() interrupts the wait state after the timer's interval
1679 * length to call the signal handler.
1680 */
1681
1682 static unsigned __stdcall ticktack(void *dummy)
1683 {
1684 while (WaitForSingleObject(timer_event, timer_interval) == WAIT_TIMEOUT) {
1685 if (timer_fn == SIG_DFL)
1686 die("Alarm");
1687 if (timer_fn != SIG_IGN)
1688 timer_fn(SIGALRM);
1689 if (one_shot)
1690 break;
1691 }
1692 return 0;
1693 }
1694
1695 static int start_timer_thread(void)
1696 {
1697 timer_event = CreateEvent(NULL, FALSE, FALSE, NULL);
1698 if (timer_event) {
1699 timer_thread = (HANDLE) _beginthreadex(NULL, 0, ticktack, NULL, 0, NULL);
1700 if (!timer_thread )
1701 return errno = ENOMEM,
1702 error("cannot start timer thread");
1703 } else
1704 return errno = ENOMEM,
1705 error("cannot allocate resources for timer");
1706 return 0;
1707 }
1708
1709 static void stop_timer_thread(void)
1710 {
1711 if (timer_event)
1712 SetEvent(timer_event); /* tell thread to terminate */
1713 if (timer_thread) {
1714 int rc = WaitForSingleObject(timer_thread, 1000);
1715 if (rc == WAIT_TIMEOUT)
1716 error("timer thread did not terminate timely");
1717 else if (rc != WAIT_OBJECT_0)
1718 error("waiting for timer thread failed: %lu",
1719 GetLastError());
1720 CloseHandle(timer_thread);
1721 }
1722 if (timer_event)
1723 CloseHandle(timer_event);
1724 timer_event = NULL;
1725 timer_thread = NULL;
1726 }
1727
1728 static inline int is_timeval_eq(const struct timeval *i1, const struct timeval *i2)
1729 {
1730 return i1->tv_sec == i2->tv_sec && i1->tv_usec == i2->tv_usec;
1731 }
1732
1733 int setitimer(int type, struct itimerval *in, struct itimerval *out)
1734 {
1735 static const struct timeval zero;
1736 static int atexit_done;
1737
1738 if (out != NULL)
1739 return errno = EINVAL,
1740 error("setitimer param 3 != NULL not implemented");
1741 if (!is_timeval_eq(&in->it_interval, &zero) &&
1742 !is_timeval_eq(&in->it_interval, &in->it_value))
1743 return errno = EINVAL,
1744 error("setitimer: it_interval must be zero or eq it_value");
1745
1746 if (timer_thread)
1747 stop_timer_thread();
1748
1749 if (is_timeval_eq(&in->it_value, &zero) &&
1750 is_timeval_eq(&in->it_interval, &zero))
1751 return 0;
1752
1753 timer_interval = in->it_value.tv_sec * 1000 + in->it_value.tv_usec / 1000;
1754 one_shot = is_timeval_eq(&in->it_interval, &zero);
1755 if (!atexit_done) {
1756 atexit(stop_timer_thread);
1757 atexit_done = 1;
1758 }
1759 return start_timer_thread();
1760 }
1761
1762 int sigaction(int sig, struct sigaction *in, struct sigaction *out)
1763 {
1764 if (sig != SIGALRM)
1765 return errno = EINVAL,
1766 error("sigaction only implemented for SIGALRM");
1767 if (out != NULL)
1768 return errno = EINVAL,
1769 error("sigaction: param 3 != NULL not implemented");
1770
1771 timer_fn = in->sa_handler;
1772 return 0;
1773 }
1774
1775 #undef signal
1776 sig_handler_t mingw_signal(int sig, sig_handler_t handler)
1777 {
1778 sig_handler_t old = timer_fn;
1779 if (sig != SIGALRM)
1780 return signal(sig, handler);
1781 timer_fn = handler;
1782 return old;
1783 }
1784
1785 static const char *make_backslash_path(const char *path)
1786 {
1787 static char buf[PATH_MAX + 1];
1788 char *c;
1789
1790 if (strlcpy(buf, path, PATH_MAX) >= PATH_MAX)
1791 die("Too long path: %.*s", 60, path);
1792
1793 for (c = buf; *c; c++) {
1794 if (*c == '/')
1795 *c = '\\';
1796 }
1797 return buf;
1798 }
1799
1800 void mingw_open_html(const char *unixpath)
1801 {
1802 const char *htmlpath = make_backslash_path(unixpath);
1803 typedef HINSTANCE (WINAPI *T)(HWND, const char *,
1804 const char *, const char *, const char *, INT);
1805 T ShellExecute;
1806 HMODULE shell32;
1807 int r;
1808
1809 shell32 = LoadLibrary("shell32.dll");
1810 if (!shell32)
1811 die("cannot load shell32.dll");
1812 ShellExecute = (T)GetProcAddress(shell32, "ShellExecuteA");
1813 if (!ShellExecute)
1814 die("cannot run browser");
1815
1816 printf("Launching default browser to display HTML ...\n");
1817 r = (int)ShellExecute(NULL, "open", htmlpath, NULL, "\\", SW_SHOWNORMAL);
1818 FreeLibrary(shell32);
1819 /* see the MSDN documentation referring to the result codes here */
1820 if (r <= 32) {
1821 die("failed to launch browser for %.*s", MAX_PATH, unixpath);
1822 }
1823 }
1824
1825 int link(const char *oldpath, const char *newpath)
1826 {
1827 typedef BOOL (WINAPI *T)(LPCWSTR, LPCWSTR, LPSECURITY_ATTRIBUTES);
1828 static T create_hard_link = NULL;
1829 wchar_t woldpath[MAX_PATH], wnewpath[MAX_PATH];
1830 if (xutftowcs_path(woldpath, oldpath) < 0 ||
1831 xutftowcs_path(wnewpath, newpath) < 0)
1832 return -1;
1833
1834 if (!create_hard_link) {
1835 create_hard_link = (T) GetProcAddress(
1836 GetModuleHandle("kernel32.dll"), "CreateHardLinkW");
1837 if (!create_hard_link)
1838 create_hard_link = (T)-1;
1839 }
1840 if (create_hard_link == (T)-1) {
1841 errno = ENOSYS;
1842 return -1;
1843 }
1844 if (!create_hard_link(wnewpath, woldpath, NULL)) {
1845 errno = err_win_to_posix(GetLastError());
1846 return -1;
1847 }
1848 return 0;
1849 }
1850
1851 char *getpass(const char *prompt)
1852 {
1853 struct strbuf buf = STRBUF_INIT;
1854
1855 fputs(prompt, stderr);
1856 for (;;) {
1857 char c = _getch();
1858 if (c == '\r' || c == '\n')
1859 break;
1860 strbuf_addch(&buf, c);
1861 }
1862 fputs("\n", stderr);
1863 return strbuf_detach(&buf, NULL);
1864 }
1865
1866 pid_t waitpid(pid_t pid, int *status, int options)
1867 {
1868 HANDLE h = OpenProcess(SYNCHRONIZE | PROCESS_QUERY_INFORMATION,
1869 FALSE, pid);
1870 if (!h) {
1871 errno = ECHILD;
1872 return -1;
1873 }
1874
1875 if (pid > 0 && options & WNOHANG) {
1876 if (WAIT_OBJECT_0 != WaitForSingleObject(h, 0)) {
1877 CloseHandle(h);
1878 return 0;
1879 }
1880 options &= ~WNOHANG;
1881 }
1882
1883 if (options == 0) {
1884 struct pinfo_t **ppinfo;
1885 if (WaitForSingleObject(h, INFINITE) != WAIT_OBJECT_0) {
1886 CloseHandle(h);
1887 return 0;
1888 }
1889
1890 if (status)
1891 GetExitCodeProcess(h, (LPDWORD)status);
1892
1893 EnterCriticalSection(&pinfo_cs);
1894
1895 ppinfo = &pinfo;
1896 while (*ppinfo) {
1897 struct pinfo_t *info = *ppinfo;
1898 if (info->pid == pid) {
1899 CloseHandle(info->proc);
1900 *ppinfo = info->next;
1901 free(info);
1902 break;
1903 }
1904 ppinfo = &info->next;
1905 }
1906
1907 LeaveCriticalSection(&pinfo_cs);
1908
1909 CloseHandle(h);
1910 return pid;
1911 }
1912 CloseHandle(h);
1913
1914 errno = EINVAL;
1915 return -1;
1916 }
1917
1918 const char *get_windows_home_directory(void)
1919 {
1920 static const char *home_directory = NULL;
1921 struct strbuf buf = STRBUF_INIT;
1922
1923 if (home_directory)
1924 return home_directory;
1925
1926 home_directory = getenv("HOME");
1927 if (home_directory && *home_directory)
1928 return home_directory;
1929
1930 strbuf_addf(&buf, "%s/%s", getenv("HOMEDRIVE"), getenv("HOMEPATH"));
1931 home_directory = strbuf_detach(&buf, NULL);
1932
1933 return home_directory;
1934 }
1935
1936 int mingw_offset_1st_component(const char *path)
1937 {
1938 int offset = 0;
1939 if (has_dos_drive_prefix(path))
1940 offset = 2;
1941
1942 /* unc paths */
1943 else if (is_dir_sep(path[0]) && is_dir_sep(path[1])) {
1944
1945 /* skip server name */
1946 char *pos = strpbrk(path + 2, "\\/");
1947 if (!pos)
1948 return 0; /* Error: malformed unc path */
1949
1950 do {
1951 pos++;
1952 } while (*pos && !is_dir_sep(*pos));
1953
1954 offset = pos - path;
1955 }
1956
1957 return offset + is_dir_sep(path[offset]);
1958 }
1959
1960 int xutftowcsn(wchar_t *wcs, const char *utfs, size_t wcslen, int utflen)
1961 {
1962 int upos = 0, wpos = 0;
1963 const unsigned char *utf = (const unsigned char*) utfs;
1964 if (!utf || !wcs || wcslen < 1) {
1965 errno = EINVAL;
1966 return -1;
1967 }
1968 /* reserve space for \0 */
1969 wcslen--;
1970 if (utflen < 0)
1971 utflen = INT_MAX;
1972
1973 while (upos < utflen) {
1974 int c = utf[upos++] & 0xff;
1975 if (utflen == INT_MAX && c == 0)
1976 break;
1977
1978 if (wpos >= wcslen) {
1979 wcs[wpos] = 0;
1980 errno = ERANGE;
1981 return -1;
1982 }
1983
1984 if (c < 0x80) {
1985 /* ASCII */
1986 wcs[wpos++] = c;
1987 } else if (c >= 0xc2 && c < 0xe0 && upos < utflen &&
1988 (utf[upos] & 0xc0) == 0x80) {
1989 /* 2-byte utf-8 */
1990 c = ((c & 0x1f) << 6);
1991 c |= (utf[upos++] & 0x3f);
1992 wcs[wpos++] = c;
1993 } else if (c >= 0xe0 && c < 0xf0 && upos + 1 < utflen &&
1994 !(c == 0xe0 && utf[upos] < 0xa0) && /* over-long encoding */
1995 (utf[upos] & 0xc0) == 0x80 &&
1996 (utf[upos + 1] & 0xc0) == 0x80) {
1997 /* 3-byte utf-8 */
1998 c = ((c & 0x0f) << 12);
1999 c |= ((utf[upos++] & 0x3f) << 6);
2000 c |= (utf[upos++] & 0x3f);
2001 wcs[wpos++] = c;
2002 } else if (c >= 0xf0 && c < 0xf5 && upos + 2 < utflen &&
2003 wpos + 1 < wcslen &&
2004 !(c == 0xf0 && utf[upos] < 0x90) && /* over-long encoding */
2005 !(c == 0xf4 && utf[upos] >= 0x90) && /* > \u10ffff */
2006 (utf[upos] & 0xc0) == 0x80 &&
2007 (utf[upos + 1] & 0xc0) == 0x80 &&
2008 (utf[upos + 2] & 0xc0) == 0x80) {
2009 /* 4-byte utf-8: convert to \ud8xx \udcxx surrogate pair */
2010 c = ((c & 0x07) << 18);
2011 c |= ((utf[upos++] & 0x3f) << 12);
2012 c |= ((utf[upos++] & 0x3f) << 6);
2013 c |= (utf[upos++] & 0x3f);
2014 c -= 0x10000;
2015 wcs[wpos++] = 0xd800 | (c >> 10);
2016 wcs[wpos++] = 0xdc00 | (c & 0x3ff);
2017 } else if (c >= 0xa0) {
2018 /* invalid utf-8 byte, printable unicode char: convert 1:1 */
2019 wcs[wpos++] = c;
2020 } else {
2021 /* invalid utf-8 byte, non-printable unicode: convert to hex */
2022 static const char *hex = "0123456789abcdef";
2023 wcs[wpos++] = hex[c >> 4];
2024 if (wpos < wcslen)
2025 wcs[wpos++] = hex[c & 0x0f];
2026 }
2027 }
2028 wcs[wpos] = 0;
2029 return wpos;
2030 }
2031
2032 int xwcstoutf(char *utf, const wchar_t *wcs, size_t utflen)
2033 {
2034 if (!wcs || !utf || utflen < 1) {
2035 errno = EINVAL;
2036 return -1;
2037 }
2038 utflen = WideCharToMultiByte(CP_UTF8, 0, wcs, -1, utf, utflen, NULL, NULL);
2039 if (utflen)
2040 return utflen - 1;
2041 errno = ERANGE;
2042 return -1;
2043 }
2044
2045 /*
2046 * Disable MSVCRT command line wildcard expansion (__getmainargs called from
2047 * mingw startup code, see init.c in mingw runtime).
2048 */
2049 int _CRT_glob = 0;
2050
2051 void mingw_startup()
2052 {
2053 /* copy executable name to argv[0] */
2054 __argv[0] = xstrdup(_pgmptr);
2055
2056 /* initialize critical section for waitpid pinfo_t list */
2057 InitializeCriticalSection(&pinfo_cs);
2058
2059 /* set up default file mode and file modes for stdin/out/err */
2060 _fmode = _O_BINARY;
2061 _setmode(_fileno(stdin), _O_BINARY);
2062 _setmode(_fileno(stdout), _O_BINARY);
2063 _setmode(_fileno(stderr), _O_BINARY);
2064
2065 /* initialize Unicode console */
2066 winansi_init();
2067 }
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