?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
Win32: patch Windows environment on startup
[git/mingw/4msysgit/kblees.git] / compat / mingw.c
blob2104f259a178b8e9317032ecf93e3f2809f2bdb7
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[10];
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, 10) < 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[10];
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, 10) < 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, MAX_PATH))
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 /*
741 * Compare environment entries by key (i.e. stopping at '=' or '\0').
742 */
743 static int compareenv(const void *v1, const void *v2)
744 {
745 const char *e1 = *(const char**)v1;
746 const char *e2 = *(const char**)v2;
747
748 for (;;) {
749 int c1 = *e1++;
750 int c2 = *e2++;
751 c1 = (c1 == '=') ? 0 : tolower(c1);
752 c2 = (c2 == '=') ? 0 : tolower(c2);
753 if (c1 > c2)
754 return 1;
755 if (c1 < c2)
756 return -1;
757 if (c1 == 0)
758 return 0;
759 }
760 }
761
762 static int bsearchenv(char **env, const char *name, size_t size)
763 {
764 unsigned low = 0, high = size - 1, mid, i, j, nmln;
765 int cmp;
766 while (low <= high) {
767 mid = (low + high) >> 1;
768 cmp = compareenv(&env[mid], &name);
769 if (cmp < 0)
770 low = mid + 1;
771 else if (cmp > 0)
772 high = mid - 1;
773 else
774 goto found;
775 }
776 return ~low; /* not found, return 1's complement of insert position */
777
778 found:
779 /* look for duplicate entries before and after the matching entry (mid) */
780 i = j = mid;
781 while (i > low && !compareenv(&env[i - 1], &name))
782 i--;
783 while (j < high && !compareenv(&env[j + 1], &name))
784 j++;
785 if (i == j)
786 return mid; /* no duplicates */
787
788 /*
789 * try case-sensitive match first, this is necessary for sh-i18n--envsubst
790 * to work with environment variables that differ only in case (e.g. $PATH
791 * and $path)
792 */
793 nmln = strchrnul(name, '=') - name;
794 for (; i <= j; i++)
795 if (!strncmp(env[i], name, nmln) && '=' == env[i][nmln])
796 /* matches */
797 return i;
798 return mid;
799 }
800
801 /*
802 * If name contains '=', then sets the variable, otherwise it unsets it
803 * Size includes the terminating NULL. Env must have room for size + 1 entries
804 * (in case of insert). Returns the new size. Optionally frees removed entries.
805 */
806 static int do_putenv(char **env, const char *name, int size, int free_old)
807 {
808 int i = bsearchenv(env, name, size - 1);
809
810 /* optionally free removed / replaced entry */
811 if (i >= 0 && free_old)
812 free(env[i]);
813
814 if (strchr(name, '=')) {
815 /* if new value ('key=value') is specified, insert or replace entry */
816 if (i < 0) {
817 i = ~i;
818 memmove(&env[i + 1], &env[i], (size - i) * sizeof(char*));
819 size++;
820 }
821 env[i] = (char*) name;
822 } else if (i >= 0) {
823 /* otherwise ('key') remove existing entry */
824 size--;
825 memmove(&env[i], &env[i + 1], (size - i) * sizeof(char*));
826 }
827 return size;
828 }
829
830 /* used number of elements of environ array, including terminating NULL */
831 static int environ_size = 0;
832 /* allocated size of environ array, in bytes */
833 static int environ_alloc = 0;
834
835 char *mingw_getenv(const char *name)
836 {
837 char *value;
838 int pos = bsearchenv(environ, name, environ_size - 1);
839 if (pos < 0)
840 return NULL;
841 value = strchr(environ[pos], '=');
842 return value ? &value[1] : NULL;
843 }
844
845 int mingw_putenv(const char *namevalue)
846 {
847 ALLOC_GROW(environ, (environ_size + 1) * sizeof(char*), environ_alloc);
848 environ_size = do_putenv(environ, namevalue, environ_size, 1);
849 return 0;
850 }
851
852 /*
853 * See http://msdn2.microsoft.com/en-us/library/17w5ykft(vs.71).aspx
854 * (Parsing C++ Command-Line Arguments)
855 */
856 static const char *quote_arg(const char *arg)
857 {
858 /* count chars to quote */
859 int len = 0, n = 0;
860 int force_quotes = 0;
861 char *q, *d;
862 const char *p = arg;
863 if (!*p) force_quotes = 1;
864 while (*p) {
865 if (isspace(*p) || *p == '*' || *p == '?' || *p == '{' || *p == '\'')
866 force_quotes = 1;
867 else if (*p == '"')
868 n++;
869 else if (*p == '\\') {
870 int count = 0;
871 while (*p == '\\') {
872 count++;
873 p++;
874 len++;
875 }
876 if (*p == '"')
877 n += count*2 + 1;
878 continue;
879 }
880 len++;
881 p++;
882 }
883 if (!force_quotes && n == 0)
884 return arg;
885
886 /* insert \ where necessary */
887 d = q = xmalloc(len+n+3);
888 *d++ = '"';
889 while (*arg) {
890 if (*arg == '"')
891 *d++ = '\\';
892 else if (*arg == '\\') {
893 int count = 0;
894 while (*arg == '\\') {
895 count++;
896 *d++ = *arg++;
897 }
898 if (*arg == '"') {
899 while (count-- > 0)
900 *d++ = '\\';
901 *d++ = '\\';
902 }
903 }
904 *d++ = *arg++;
905 }
906 *d++ = '"';
907 *d++ = 0;
908 return q;
909 }
910
911 static const char *parse_interpreter(const char *cmd)
912 {
913 static char buf[100];
914 char *p, *opt;
915 int n, fd;
916
917 /* don't even try a .exe */
918 n = strlen(cmd);
919 if (n >= 4 && !strcasecmp(cmd+n-4, ".exe"))
920 return NULL;
921
922 fd = open(cmd, O_RDONLY);
923 if (fd < 0)
924 return NULL;
925 n = read(fd, buf, sizeof(buf)-1);
926 close(fd);
927 if (n < 4) /* at least '#!/x' and not error */
928 return NULL;
929
930 if (buf[0] != '#' || buf[1] != '!')
931 return NULL;
932 buf[n] = '\0';
933 p = buf + strcspn(buf, "\r\n");
934 if (!*p)
935 return NULL;
936
937 *p = '\0';
938 if (!(p = strrchr(buf+2, '/')) && !(p = strrchr(buf+2, '\\')))
939 return NULL;
940 /* strip options */
941 if ((opt = strchr(p+1, ' ')))
942 *opt = '\0';
943 return p+1;
944 }
945
946 /*
947 * Splits the PATH into parts.
948 */
949 static char **get_path_split(void)
950 {
951 char *p, **path, *envpath = getenv("PATH");
952 int i, n = 0;
953
954 if (!envpath || !*envpath)
955 return NULL;
956
957 envpath = xstrdup(envpath);
958 p = envpath;
959 while (p) {
960 char *dir = p;
961 p = strchr(p, ';');
962 if (p) *p++ = '\0';
963 if (*dir) { /* not earlier, catches series of ; */
964 ++n;
965 }
966 }
967 if (!n)
968 return NULL;
969
970 path = xmalloc((n+1)*sizeof(char *));
971 p = envpath;
972 i = 0;
973 do {
974 if (*p)
975 path[i++] = xstrdup(p);
976 p = p+strlen(p)+1;
977 } while (i < n);
978 path[i] = NULL;
979
980 free(envpath);
981
982 return path;
983 }
984
985 static void free_path_split(char **path)
986 {
987 char **p = path;
988
989 if (!path)
990 return;
991
992 while (*p)
993 free(*p++);
994 free(path);
995 }
996
997 /*
998 * exe_only means that we only want to detect .exe files, but not scripts
999 * (which do not have an extension)
1000 */
1001 static char *lookup_prog(const char *dir, const char *cmd, int isexe, int exe_only)
1002 {
1003 char path[MAX_PATH];
1004 snprintf(path, sizeof(path), "%s\\%s.exe", dir, cmd);
1005
1006 if (!isexe && access(path, F_OK) == 0)
1007 return xstrdup(path);
1008 path[strlen(path)-4] = '\0';
1009 if ((!exe_only || isexe) && access(path, F_OK) == 0)
1010 if (!(GetFileAttributes(path) & FILE_ATTRIBUTE_DIRECTORY))
1011 return xstrdup(path);
1012 return NULL;
1013 }
1014
1015 /*
1016 * Determines the absolute path of cmd using the split path in path.
1017 * If cmd contains a slash or backslash, no lookup is performed.
1018 */
1019 static char *path_lookup(const char *cmd, char **path, int exe_only)
1020 {
1021 char *prog = NULL;
1022 int len = strlen(cmd);
1023 int isexe = len >= 4 && !strcasecmp(cmd+len-4, ".exe");
1024
1025 if (strchr(cmd, '/') || strchr(cmd, '\\'))
1026 prog = xstrdup(cmd);
1027
1028 while (!prog && *path)
1029 prog = lookup_prog(*path++, cmd, isexe, exe_only);
1030
1031 return prog;
1032 }
1033
1034 /*
1035 * Create environment block suitable for CreateProcess. Merges current
1036 * process environment and the supplied environment changes.
1037 */
1038 static wchar_t *make_environment_block(char **deltaenv)
1039 {
1040 wchar_t *wenvblk = NULL;
1041 char **tmpenv;
1042 int i = 0, size = environ_size, envblksz = 0, envblkpos = 0;
1043
1044 while (deltaenv && deltaenv[i])
1045 i++;
1046
1047 /* copy the environment, leaving space for changes */
1048 tmpenv = xmalloc((size + i) * sizeof(char*));
1049 memcpy(tmpenv, environ, size * sizeof(char*));
1050
1051 /* merge supplied environment changes into the temporary environment */
1052 for (i = 0; deltaenv && deltaenv[i]; i++)
1053 size = do_putenv(tmpenv, deltaenv[i], size, 0);
1054
1055 /* create environment block from temporary environment */
1056 for (i = 0; tmpenv[i]; i++) {
1057 size = 2 * strlen(tmpenv[i]) + 2;
1058 ALLOC_GROW(wenvblk, (envblkpos + size) * sizeof(wchar_t), envblksz);
1059 envblkpos += xutftowcs(&wenvblk[envblkpos], tmpenv[i], size) + 1;
1060 }
1061 /* add final \0 terminator */
1062 wenvblk[envblkpos] = 0;
1063 free(tmpenv);
1064 return wenvblk;
1065 }
1066
1067 struct pinfo_t {
1068 struct pinfo_t *next;
1069 pid_t pid;
1070 HANDLE proc;
1071 } pinfo_t;
1072 struct pinfo_t *pinfo = NULL;
1073 CRITICAL_SECTION pinfo_cs;
1074
1075 static pid_t mingw_spawnve_fd(const char *cmd, const char **argv, char **deltaenv,
1076 const char *dir,
1077 int prepend_cmd, int fhin, int fhout, int fherr)
1078 {
1079 STARTUPINFOW si;
1080 PROCESS_INFORMATION pi;
1081 struct strbuf args;
1082 wchar_t wcmd[MAX_PATH], wdir[MAX_PATH], *wargs, *wenvblk = NULL;
1083 unsigned flags = CREATE_UNICODE_ENVIRONMENT;
1084 BOOL ret;
1085
1086 /* Determine whether or not we are associated to a console */
1087 HANDLE cons = CreateFile("CONOUT$", GENERIC_WRITE,
1088 FILE_SHARE_WRITE, NULL, OPEN_EXISTING,
1089 FILE_ATTRIBUTE_NORMAL, NULL);
1090 if (cons == INVALID_HANDLE_VALUE) {
1091 /* There is no console associated with this process.
1092 * Since the child is a console process, Windows
1093 * would normally create a console window. But
1094 * since we'll be redirecting std streams, we do
1095 * not need the console.
1096 * It is necessary to use DETACHED_PROCESS
1097 * instead of CREATE_NO_WINDOW to make ssh
1098 * recognize that it has no console.
1099 */
1100 flags |= DETACHED_PROCESS;
1101 } else {
1102 /* There is already a console. If we specified
1103 * DETACHED_PROCESS here, too, Windows would
1104 * disassociate the child from the console.
1105 * The same is true for CREATE_NO_WINDOW.
1106 * Go figure!
1107 */
1108 CloseHandle(cons);
1109 }
1110 memset(&si, 0, sizeof(si));
1111 si.cb = sizeof(si);
1112 si.dwFlags = STARTF_USESTDHANDLES;
1113 si.hStdInput = winansi_get_osfhandle(fhin);
1114 si.hStdOutput = winansi_get_osfhandle(fhout);
1115 si.hStdError = winansi_get_osfhandle(fherr);
1116
1117 if (xutftowcs_path(wcmd, cmd) < 0)
1118 return -1;
1119 if (dir && xutftowcs_path(wdir, dir) < 0)
1120 return -1;
1121
1122 /* concatenate argv, quoting args as we go */
1123 strbuf_init(&args, 0);
1124 if (prepend_cmd) {
1125 char *quoted = (char *)quote_arg(cmd);
1126 strbuf_addstr(&args, quoted);
1127 if (quoted != cmd)
1128 free(quoted);
1129 }
1130 for (; *argv; argv++) {
1131 char *quoted = (char *)quote_arg(*argv);
1132 if (*args.buf)
1133 strbuf_addch(&args, ' ');
1134 strbuf_addstr(&args, quoted);
1135 if (quoted != *argv)
1136 free(quoted);
1137 }
1138
1139 wargs = xmalloc((2 * args.len + 1) * sizeof(wchar_t));
1140 xutftowcs(wargs, args.buf, 2 * args.len + 1);
1141 strbuf_release(&args);
1142
1143 wenvblk = make_environment_block(deltaenv);
1144
1145 memset(&pi, 0, sizeof(pi));
1146 ret = CreateProcessW(wcmd, wargs, NULL, NULL, TRUE, flags,
1147 wenvblk, dir ? wdir : NULL, &si, &pi);
1148
1149 free(wenvblk);
1150 free(wargs);
1151
1152 if (!ret) {
1153 errno = ENOENT;
1154 return -1;
1155 }
1156 CloseHandle(pi.hThread);
1157
1158 /*
1159 * The process ID is the human-readable identifier of the process
1160 * that we want to present in log and error messages. The handle
1161 * is not useful for this purpose. But we cannot close it, either,
1162 * because it is not possible to turn a process ID into a process
1163 * handle after the process terminated.
1164 * Keep the handle in a list for waitpid.
1165 */
1166 EnterCriticalSection(&pinfo_cs);
1167 {
1168 struct pinfo_t *info = xmalloc(sizeof(struct pinfo_t));
1169 info->pid = pi.dwProcessId;
1170 info->proc = pi.hProcess;
1171 info->next = pinfo;
1172 pinfo = info;
1173 }
1174 LeaveCriticalSection(&pinfo_cs);
1175
1176 return (pid_t)pi.dwProcessId;
1177 }
1178
1179 static pid_t mingw_spawnv(const char *cmd, const char **argv, int prepend_cmd)
1180 {
1181 return mingw_spawnve_fd(cmd, argv, NULL, NULL, prepend_cmd, 0, 1, 2);
1182 }
1183
1184 pid_t mingw_spawnvpe(const char *cmd, const char **argv, char **deltaenv,
1185 const char *dir,
1186 int fhin, int fhout, int fherr)
1187 {
1188 pid_t pid;
1189 char **path = get_path_split();
1190 char *prog = path_lookup(cmd, path, 0);
1191
1192 if (!prog) {
1193 errno = ENOENT;
1194 pid = -1;
1195 }
1196 else {
1197 const char *interpr = parse_interpreter(prog);
1198
1199 if (interpr) {
1200 const char *argv0 = argv[0];
1201 char *iprog = path_lookup(interpr, path, 1);
1202 argv[0] = prog;
1203 if (!iprog) {
1204 errno = ENOENT;
1205 pid = -1;
1206 }
1207 else {
1208 pid = mingw_spawnve_fd(iprog, argv, deltaenv, dir, 1,
1209 fhin, fhout, fherr);
1210 free(iprog);
1211 }
1212 argv[0] = argv0;
1213 }
1214 else
1215 pid = mingw_spawnve_fd(prog, argv, deltaenv, dir, 0,
1216 fhin, fhout, fherr);
1217 free(prog);
1218 }
1219 free_path_split(path);
1220 return pid;
1221 }
1222
1223 static int try_shell_exec(const char *cmd, char *const *argv)
1224 {
1225 const char *interpr = parse_interpreter(cmd);
1226 char **path;
1227 char *prog;
1228 int pid = 0;
1229
1230 if (!interpr)
1231 return 0;
1232 path = get_path_split();
1233 prog = path_lookup(interpr, path, 1);
1234 if (prog) {
1235 int argc = 0;
1236 const char **argv2;
1237 while (argv[argc]) argc++;
1238 argv2 = xmalloc(sizeof(*argv) * (argc+1));
1239 argv2[0] = (char *)cmd; /* full path to the script file */
1240 memcpy(&argv2[1], &argv[1], sizeof(*argv) * argc);
1241 pid = mingw_spawnv(prog, argv2, 1);
1242 if (pid >= 0) {
1243 int status;
1244 if (waitpid(pid, &status, 0) < 0)
1245 status = 255;
1246 exit(status);
1247 }
1248 pid = 1; /* indicate that we tried but failed */
1249 free(prog);
1250 free(argv2);
1251 }
1252 free_path_split(path);
1253 return pid;
1254 }
1255
1256 void mingw_execv(const char *cmd, char *const *argv)
1257 {
1258 /* check if git_command is a shell script */
1259 if (!try_shell_exec(cmd, argv)) {
1260 int pid, status;
1261
1262 pid = mingw_spawnv(cmd, (const char **)argv, 0);
1263 if (pid < 0)
1264 return;
1265 if (waitpid(pid, &status, 0) < 0)
1266 status = 255;
1267 exit(status);
1268 }
1269 }
1270
1271 void mingw_execvp(const char *cmd, char *const *argv)
1272 {
1273 char **path = get_path_split();
1274 char *prog = path_lookup(cmd, path, 0);
1275
1276 if (prog) {
1277 mingw_execv(prog, argv);
1278 free(prog);
1279 } else
1280 errno = ENOENT;
1281
1282 free_path_split(path);
1283 }
1284
1285 int mingw_kill(pid_t pid, int sig)
1286 {
1287 if (pid > 0 && sig == SIGTERM) {
1288 HANDLE h = OpenProcess(PROCESS_TERMINATE, FALSE, pid);
1289
1290 if (TerminateProcess(h, -1)) {
1291 CloseHandle(h);
1292 return 0;
1293 }
1294
1295 errno = err_win_to_posix(GetLastError());
1296 CloseHandle(h);
1297 return -1;
1298 }
1299
1300 errno = EINVAL;
1301 return -1;
1302 }
1303
1304 /*
1305 * Note, this isn't a complete replacement for getaddrinfo. It assumes
1306 * that service contains a numerical port, or that it is null. It
1307 * does a simple search using gethostbyname, and returns one IPv4 host
1308 * if one was found.
1309 */
1310 static int WSAAPI getaddrinfo_stub(const char *node, const char *service,
1311 const struct addrinfo *hints,
1312 struct addrinfo **res)
1313 {
1314 struct hostent *h = NULL;
1315 struct addrinfo *ai;
1316 struct sockaddr_in *sin;
1317
1318 if (node) {
1319 h = gethostbyname(node);
1320 if (!h)
1321 return WSAGetLastError();
1322 }
1323
1324 ai = xmalloc(sizeof(struct addrinfo));
1325 *res = ai;
1326 ai->ai_flags = 0;
1327 ai->ai_family = AF_INET;
1328 ai->ai_socktype = hints ? hints->ai_socktype : 0;
1329 switch (ai->ai_socktype) {
1330 case SOCK_STREAM:
1331 ai->ai_protocol = IPPROTO_TCP;
1332 break;
1333 case SOCK_DGRAM:
1334 ai->ai_protocol = IPPROTO_UDP;
1335 break;
1336 default:
1337 ai->ai_protocol = 0;
1338 break;
1339 }
1340 ai->ai_addrlen = sizeof(struct sockaddr_in);
1341 if (hints && (hints->ai_flags & AI_CANONNAME))
1342 ai->ai_canonname = h ? xstrdup(h->h_name) : NULL;
1343 else
1344 ai->ai_canonname = NULL;
1345
1346 sin = xmalloc(ai->ai_addrlen);
1347 memset(sin, 0, ai->ai_addrlen);
1348 sin->sin_family = AF_INET;
1349 /* Note: getaddrinfo is supposed to allow service to be a string,
1350 * which should be looked up using getservbyname. This is
1351 * currently not implemented */
1352 if (service)
1353 sin->sin_port = htons(atoi(service));
1354 if (h)
1355 sin->sin_addr = *(struct in_addr *)h->h_addr;
1356 else if (hints && (hints->ai_flags & AI_PASSIVE))
1357 sin->sin_addr.s_addr = INADDR_ANY;
1358 else
1359 sin->sin_addr.s_addr = INADDR_LOOPBACK;
1360 ai->ai_addr = (struct sockaddr *)sin;
1361 ai->ai_next = 0;
1362 return 0;
1363 }
1364
1365 static void WSAAPI freeaddrinfo_stub(struct addrinfo *res)
1366 {
1367 free(res->ai_canonname);
1368 free(res->ai_addr);
1369 free(res);
1370 }
1371
1372 static int WSAAPI getnameinfo_stub(const struct sockaddr *sa, socklen_t salen,
1373 char *host, DWORD hostlen,
1374 char *serv, DWORD servlen, int flags)
1375 {
1376 const struct sockaddr_in *sin = (const struct sockaddr_in *)sa;
1377 if (sa->sa_family != AF_INET)
1378 return EAI_FAMILY;
1379 if (!host && !serv)
1380 return EAI_NONAME;
1381
1382 if (host && hostlen > 0) {
1383 struct hostent *ent = NULL;
1384 if (!(flags & NI_NUMERICHOST))
1385 ent = gethostbyaddr((const char *)&sin->sin_addr,
1386 sizeof(sin->sin_addr), AF_INET);
1387
1388 if (ent)
1389 snprintf(host, hostlen, "%s", ent->h_name);
1390 else if (flags & NI_NAMEREQD)
1391 return EAI_NONAME;
1392 else
1393 snprintf(host, hostlen, "%s", inet_ntoa(sin->sin_addr));
1394 }
1395
1396 if (serv && servlen > 0) {
1397 struct servent *ent = NULL;
1398 if (!(flags & NI_NUMERICSERV))
1399 ent = getservbyport(sin->sin_port,
1400 flags & NI_DGRAM ? "udp" : "tcp");
1401
1402 if (ent)
1403 snprintf(serv, servlen, "%s", ent->s_name);
1404 else
1405 snprintf(serv, servlen, "%d", ntohs(sin->sin_port));
1406 }
1407
1408 return 0;
1409 }
1410
1411 static HMODULE ipv6_dll = NULL;
1412 static void (WSAAPI *ipv6_freeaddrinfo)(struct addrinfo *res);
1413 static int (WSAAPI *ipv6_getaddrinfo)(const char *node, const char *service,
1414 const struct addrinfo *hints,
1415 struct addrinfo **res);
1416 static int (WSAAPI *ipv6_getnameinfo)(const struct sockaddr *sa, socklen_t salen,
1417 char *host, DWORD hostlen,
1418 char *serv, DWORD servlen, int flags);
1419 /*
1420 * gai_strerror is an inline function in the ws2tcpip.h header, so we
1421 * don't need to try to load that one dynamically.
1422 */
1423
1424 static void socket_cleanup(void)
1425 {
1426 WSACleanup();
1427 if (ipv6_dll)
1428 FreeLibrary(ipv6_dll);
1429 ipv6_dll = NULL;
1430 ipv6_freeaddrinfo = freeaddrinfo_stub;
1431 ipv6_getaddrinfo = getaddrinfo_stub;
1432 ipv6_getnameinfo = getnameinfo_stub;
1433 }
1434
1435 static void ensure_socket_initialization(void)
1436 {
1437 WSADATA wsa;
1438 static int initialized = 0;
1439 const char *libraries[] = { "ws2_32.dll", "wship6.dll", NULL };
1440 const char **name;
1441
1442 if (initialized)
1443 return;
1444
1445 if (WSAStartup(MAKEWORD(2,2), &wsa))
1446 die("unable to initialize winsock subsystem, error %d",
1447 WSAGetLastError());
1448
1449 for (name = libraries; *name; name++) {
1450 ipv6_dll = LoadLibrary(*name);
1451 if (!ipv6_dll)
1452 continue;
1453
1454 ipv6_freeaddrinfo = (void (WSAAPI *)(struct addrinfo *))
1455 GetProcAddress(ipv6_dll, "freeaddrinfo");
1456 ipv6_getaddrinfo = (int (WSAAPI *)(const char *, const char *,
1457 const struct addrinfo *,
1458 struct addrinfo **))
1459 GetProcAddress(ipv6_dll, "getaddrinfo");
1460 ipv6_getnameinfo = (int (WSAAPI *)(const struct sockaddr *,
1461 socklen_t, char *, DWORD,
1462 char *, DWORD, int))
1463 GetProcAddress(ipv6_dll, "getnameinfo");
1464 if (!ipv6_freeaddrinfo || !ipv6_getaddrinfo || !ipv6_getnameinfo) {
1465 FreeLibrary(ipv6_dll);
1466 ipv6_dll = NULL;
1467 } else
1468 break;
1469 }
1470 if (!ipv6_freeaddrinfo || !ipv6_getaddrinfo || !ipv6_getnameinfo) {
1471 ipv6_freeaddrinfo = freeaddrinfo_stub;
1472 ipv6_getaddrinfo = getaddrinfo_stub;
1473 ipv6_getnameinfo = getnameinfo_stub;
1474 }
1475
1476 atexit(socket_cleanup);
1477 initialized = 1;
1478 }
1479
1480 #undef gethostname
1481 int mingw_gethostname(char *name, int namelen)
1482 {
1483 ensure_socket_initialization();
1484 return gethostname(name, namelen);
1485 }
1486
1487 #undef gethostbyname
1488 struct hostent *mingw_gethostbyname(const char *host)
1489 {
1490 ensure_socket_initialization();
1491 return gethostbyname(host);
1492 }
1493
1494 void mingw_freeaddrinfo(struct addrinfo *res)
1495 {
1496 ipv6_freeaddrinfo(res);
1497 }
1498
1499 int mingw_getaddrinfo(const char *node, const char *service,
1500 const struct addrinfo *hints, struct addrinfo **res)
1501 {
1502 ensure_socket_initialization();
1503 return ipv6_getaddrinfo(node, service, hints, res);
1504 }
1505
1506 int mingw_getnameinfo(const struct sockaddr *sa, socklen_t salen,
1507 char *host, DWORD hostlen, char *serv, DWORD servlen,
1508 int flags)
1509 {
1510 ensure_socket_initialization();
1511 return ipv6_getnameinfo(sa, salen, host, hostlen, serv, servlen, flags);
1512 }
1513
1514 int mingw_socket(int domain, int type, int protocol)
1515 {
1516 int sockfd;
1517 SOCKET s;
1518
1519 ensure_socket_initialization();
1520 s = WSASocket(domain, type, protocol, NULL, 0, 0);
1521 if (s == INVALID_SOCKET) {
1522 /*
1523 * WSAGetLastError() values are regular BSD error codes
1524 * biased by WSABASEERR.
1525 * However, strerror() does not know about networking
1526 * specific errors, which are values beginning at 38 or so.
1527 * Therefore, we choose to leave the biased error code
1528 * in errno so that _if_ someone looks up the code somewhere,
1529 * then it is at least the number that are usually listed.
1530 */
1531 errno = WSAGetLastError();
1532 return -1;
1533 }
1534 /* convert into a file descriptor */
1535 if ((sockfd = _open_osfhandle(s, O_RDWR|O_BINARY)) < 0) {
1536 closesocket(s);
1537 return error("unable to make a socket file descriptor: %s",
1538 strerror(errno));
1539 }
1540 return sockfd;
1541 }
1542
1543 #undef connect
1544 int mingw_connect(int sockfd, struct sockaddr *sa, size_t sz)
1545 {
1546 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
1547 return connect(s, sa, sz);
1548 }
1549
1550 #undef bind
1551 int mingw_bind(int sockfd, struct sockaddr *sa, size_t sz)
1552 {
1553 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
1554 return bind(s, sa, sz);
1555 }
1556
1557 #undef setsockopt
1558 int mingw_setsockopt(int sockfd, int lvl, int optname, void *optval, int optlen)
1559 {
1560 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
1561 return setsockopt(s, lvl, optname, (const char*)optval, optlen);
1562 }
1563
1564 #undef shutdown
1565 int mingw_shutdown(int sockfd, int how)
1566 {
1567 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
1568 return shutdown(s, how);
1569 }
1570
1571 #undef listen
1572 int mingw_listen(int sockfd, int backlog)
1573 {
1574 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
1575 return listen(s, backlog);
1576 }
1577
1578 #undef accept
1579 int mingw_accept(int sockfd1, struct sockaddr *sa, socklen_t *sz)
1580 {
1581 int sockfd2;
1582
1583 SOCKET s1 = (SOCKET)_get_osfhandle(sockfd1);
1584 SOCKET s2 = accept(s1, sa, sz);
1585
1586 /* convert into a file descriptor */
1587 if ((sockfd2 = _open_osfhandle(s2, O_RDWR|O_BINARY)) < 0) {
1588 int err = errno;
1589 closesocket(s2);
1590 return error("unable to make a socket file descriptor: %s",
1591 strerror(err));
1592 }
1593 return sockfd2;
1594 }
1595
1596 #undef rename
1597 int mingw_rename(const char *pold, const char *pnew)
1598 {
1599 DWORD attrs, gle;
1600 int tries = 0;
1601 wchar_t wpold[MAX_PATH], wpnew[MAX_PATH];
1602 if (xutftowcs_path(wpold, pold) < 0 || xutftowcs_path(wpnew, pnew) < 0)
1603 return -1;
1604
1605 /*
1606 * Try native rename() first to get errno right.
1607 * It is based on MoveFile(), which cannot overwrite existing files.
1608 */
1609 if (!_wrename(wpold, wpnew))
1610 return 0;
1611 if (errno != EEXIST)
1612 return -1;
1613 repeat:
1614 if (MoveFileExW(wpold, wpnew, MOVEFILE_REPLACE_EXISTING))
1615 return 0;
1616 /* TODO: translate more errors */
1617 gle = GetLastError();
1618 if (gle == ERROR_ACCESS_DENIED &&
1619 (attrs = GetFileAttributesW(wpnew)) != INVALID_FILE_ATTRIBUTES) {
1620 if (attrs & FILE_ATTRIBUTE_DIRECTORY) {
1621 errno = EISDIR;
1622 return -1;
1623 }
1624 if ((attrs & FILE_ATTRIBUTE_READONLY) &&
1625 SetFileAttributesW(wpnew, attrs & ~FILE_ATTRIBUTE_READONLY)) {
1626 if (MoveFileExW(wpold, wpnew, MOVEFILE_REPLACE_EXISTING))
1627 return 0;
1628 gle = GetLastError();
1629 /* revert file attributes on failure */
1630 SetFileAttributesW(wpnew, attrs);
1631 }
1632 }
1633 if (tries < ARRAY_SIZE(delay) && gle == ERROR_ACCESS_DENIED) {
1634 /*
1635 * We assume that some other process had the source or
1636 * destination file open at the wrong moment and retry.
1637 * In order to give the other process a higher chance to
1638 * complete its operation, we give up our time slice now.
1639 * If we have to retry again, we do sleep a bit.
1640 */
1641 Sleep(delay[tries]);
1642 tries++;
1643 goto repeat;
1644 }
1645 if (gle == ERROR_ACCESS_DENIED &&
1646 ask_yes_no_if_possible("Rename from '%s' to '%s' failed. "
1647 "Should I try again?", pold, pnew))
1648 goto repeat;
1649
1650 errno = EACCES;
1651 return -1;
1652 }
1653
1654 /*
1655 * Note that this doesn't return the actual pagesize, but
1656 * the allocation granularity. If future Windows specific git code
1657 * needs the real getpagesize function, we need to find another solution.
1658 */
1659 int mingw_getpagesize(void)
1660 {
1661 SYSTEM_INFO si;
1662 GetSystemInfo(&si);
1663 return si.dwAllocationGranularity;
1664 }
1665
1666 struct passwd *getpwuid(int uid)
1667 {
1668 static char user_name[100];
1669 static struct passwd p;
1670
1671 DWORD len = sizeof(user_name);
1672 if (!GetUserName(user_name, &len))
1673 return NULL;
1674 p.pw_name = user_name;
1675 p.pw_gecos = "unknown";
1676 p.pw_dir = NULL;
1677 return &p;
1678 }
1679
1680 static HANDLE timer_event;
1681 static HANDLE timer_thread;
1682 static int timer_interval;
1683 static int one_shot;
1684 static sig_handler_t timer_fn = SIG_DFL;
1685
1686 /* The timer works like this:
1687 * The thread, ticktack(), is a trivial routine that most of the time
1688 * only waits to receive the signal to terminate. The main thread tells
1689 * the thread to terminate by setting the timer_event to the signalled
1690 * state.
1691 * But ticktack() interrupts the wait state after the timer's interval
1692 * length to call the signal handler.
1693 */
1694
1695 static unsigned __stdcall ticktack(void *dummy)
1696 {
1697 while (WaitForSingleObject(timer_event, timer_interval) == WAIT_TIMEOUT) {
1698 if (timer_fn == SIG_DFL)
1699 die("Alarm");
1700 if (timer_fn != SIG_IGN)
1701 timer_fn(SIGALRM);
1702 if (one_shot)
1703 break;
1704 }
1705 return 0;
1706 }
1707
1708 static int start_timer_thread(void)
1709 {
1710 timer_event = CreateEvent(NULL, FALSE, FALSE, NULL);
1711 if (timer_event) {
1712 timer_thread = (HANDLE) _beginthreadex(NULL, 0, ticktack, NULL, 0, NULL);
1713 if (!timer_thread )
1714 return errno = ENOMEM,
1715 error("cannot start timer thread");
1716 } else
1717 return errno = ENOMEM,
1718 error("cannot allocate resources for timer");
1719 return 0;
1720 }
1721
1722 static void stop_timer_thread(void)
1723 {
1724 if (timer_event)
1725 SetEvent(timer_event); /* tell thread to terminate */
1726 if (timer_thread) {
1727 int rc = WaitForSingleObject(timer_thread, 1000);
1728 if (rc == WAIT_TIMEOUT)
1729 error("timer thread did not terminate timely");
1730 else if (rc != WAIT_OBJECT_0)
1731 error("waiting for timer thread failed: %lu",
1732 GetLastError());
1733 CloseHandle(timer_thread);
1734 }
1735 if (timer_event)
1736 CloseHandle(timer_event);
1737 timer_event = NULL;
1738 timer_thread = NULL;
1739 }
1740
1741 static inline int is_timeval_eq(const struct timeval *i1, const struct timeval *i2)
1742 {
1743 return i1->tv_sec == i2->tv_sec && i1->tv_usec == i2->tv_usec;
1744 }
1745
1746 int setitimer(int type, struct itimerval *in, struct itimerval *out)
1747 {
1748 static const struct timeval zero;
1749 static int atexit_done;
1750
1751 if (out != NULL)
1752 return errno = EINVAL,
1753 error("setitimer param 3 != NULL not implemented");
1754 if (!is_timeval_eq(&in->it_interval, &zero) &&
1755 !is_timeval_eq(&in->it_interval, &in->it_value))
1756 return errno = EINVAL,
1757 error("setitimer: it_interval must be zero or eq it_value");
1758
1759 if (timer_thread)
1760 stop_timer_thread();
1761
1762 if (is_timeval_eq(&in->it_value, &zero) &&
1763 is_timeval_eq(&in->it_interval, &zero))
1764 return 0;
1765
1766 timer_interval = in->it_value.tv_sec * 1000 + in->it_value.tv_usec / 1000;
1767 one_shot = is_timeval_eq(&in->it_interval, &zero);
1768 if (!atexit_done) {
1769 atexit(stop_timer_thread);
1770 atexit_done = 1;
1771 }
1772 return start_timer_thread();
1773 }
1774
1775 int sigaction(int sig, struct sigaction *in, struct sigaction *out)
1776 {
1777 if (sig != SIGALRM)
1778 return errno = EINVAL,
1779 error("sigaction only implemented for SIGALRM");
1780 if (out != NULL)
1781 return errno = EINVAL,
1782 error("sigaction: param 3 != NULL not implemented");
1783
1784 timer_fn = in->sa_handler;
1785 return 0;
1786 }
1787
1788 #undef signal
1789 sig_handler_t mingw_signal(int sig, sig_handler_t handler)
1790 {
1791 sig_handler_t old = timer_fn;
1792 if (sig != SIGALRM)
1793 return signal(sig, handler);
1794 timer_fn = handler;
1795 return old;
1796 }
1797
1798 static const char *make_backslash_path(const char *path)
1799 {
1800 static char buf[PATH_MAX + 1];
1801 char *c;
1802
1803 if (strlcpy(buf, path, PATH_MAX) >= PATH_MAX)
1804 die("Too long path: %.*s", 60, path);
1805
1806 for (c = buf; *c; c++) {
1807 if (*c == '/')
1808 *c = '\\';
1809 }
1810 return buf;
1811 }
1812
1813 void mingw_open_html(const char *unixpath)
1814 {
1815 const char *htmlpath = make_backslash_path(unixpath);
1816 typedef HINSTANCE (WINAPI *T)(HWND, const char *,
1817 const char *, const char *, const char *, INT);
1818 T ShellExecute;
1819 HMODULE shell32;
1820 int r;
1821
1822 shell32 = LoadLibrary("shell32.dll");
1823 if (!shell32)
1824 die("cannot load shell32.dll");
1825 ShellExecute = (T)GetProcAddress(shell32, "ShellExecuteA");
1826 if (!ShellExecute)
1827 die("cannot run browser");
1828
1829 printf("Launching default browser to display HTML ...\n");
1830 r = (int)ShellExecute(NULL, "open", htmlpath, NULL, "\\", SW_SHOWNORMAL);
1831 FreeLibrary(shell32);
1832 /* see the MSDN documentation referring to the result codes here */
1833 if (r <= 32) {
1834 die("failed to launch browser for %.*s", MAX_PATH, unixpath);
1835 }
1836 }
1837
1838 int link(const char *oldpath, const char *newpath)
1839 {
1840 typedef BOOL (WINAPI *T)(LPCWSTR, LPCWSTR, LPSECURITY_ATTRIBUTES);
1841 static T create_hard_link = NULL;
1842 wchar_t woldpath[MAX_PATH], wnewpath[MAX_PATH];
1843 if (xutftowcs_path(woldpath, oldpath) < 0 ||
1844 xutftowcs_path(wnewpath, newpath) < 0)
1845 return -1;
1846
1847 if (!create_hard_link) {
1848 create_hard_link = (T) GetProcAddress(
1849 GetModuleHandle("kernel32.dll"), "CreateHardLinkW");
1850 if (!create_hard_link)
1851 create_hard_link = (T)-1;
1852 }
1853 if (create_hard_link == (T)-1) {
1854 errno = ENOSYS;
1855 return -1;
1856 }
1857 if (!create_hard_link(wnewpath, woldpath, NULL)) {
1858 errno = err_win_to_posix(GetLastError());
1859 return -1;
1860 }
1861 return 0;
1862 }
1863
1864 char *getpass(const char *prompt)
1865 {
1866 struct strbuf buf = STRBUF_INIT;
1867
1868 fputs(prompt, stderr);
1869 for (;;) {
1870 char c = _getch();
1871 if (c == '\r' || c == '\n')
1872 break;
1873 strbuf_addch(&buf, c);
1874 }
1875 fputs("\n", stderr);
1876 return strbuf_detach(&buf, NULL);
1877 }
1878
1879 pid_t waitpid(pid_t pid, int *status, unsigned options)
1880 {
1881 HANDLE h = OpenProcess(SYNCHRONIZE | PROCESS_QUERY_INFORMATION,
1882 FALSE, pid);
1883 if (!h) {
1884 errno = ECHILD;
1885 return -1;
1886 }
1887
1888 if (pid > 0 && options & WNOHANG) {
1889 if (WAIT_OBJECT_0 != WaitForSingleObject(h, 0)) {
1890 CloseHandle(h);
1891 return 0;
1892 }
1893 options &= ~WNOHANG;
1894 }
1895
1896 if (options == 0) {
1897 struct pinfo_t **ppinfo;
1898 if (WaitForSingleObject(h, INFINITE) != WAIT_OBJECT_0) {
1899 CloseHandle(h);
1900 return 0;
1901 }
1902
1903 if (status)
1904 GetExitCodeProcess(h, (LPDWORD)status);
1905
1906 EnterCriticalSection(&pinfo_cs);
1907
1908 ppinfo = &pinfo;
1909 while (*ppinfo) {
1910 struct pinfo_t *info = *ppinfo;
1911 if (info->pid == pid) {
1912 CloseHandle(info->proc);
1913 *ppinfo = info->next;
1914 free(info);
1915 break;
1916 }
1917 ppinfo = &info->next;
1918 }
1919
1920 LeaveCriticalSection(&pinfo_cs);
1921
1922 CloseHandle(h);
1923 return pid;
1924 }
1925 CloseHandle(h);
1926
1927 errno = EINVAL;
1928 return -1;
1929 }
1930
1931 const char *get_windows_home_directory(void)
1932 {
1933 static const char *home_directory = NULL;
1934 struct strbuf buf = STRBUF_INIT;
1935
1936 if (home_directory)
1937 return home_directory;
1938
1939 home_directory = getenv("HOME");
1940 if (home_directory && *home_directory)
1941 return home_directory;
1942
1943 strbuf_addf(&buf, "%s/%s", getenv("HOMEDRIVE"), getenv("HOMEPATH"));
1944 home_directory = strbuf_detach(&buf, NULL);
1945
1946 return home_directory;
1947 }
1948
1949 int mingw_offset_1st_component(const char *path)
1950 {
1951 int offset = 0;
1952 if (has_dos_drive_prefix(path))
1953 offset = 2;
1954
1955 /* unc paths */
1956 else if (is_dir_sep(path[0]) && is_dir_sep(path[1])) {
1957
1958 /* skip server name */
1959 char *pos = strpbrk(path + 2, "\\/");
1960 if (!pos)
1961 return 0; /* Error: malformed unc path */
1962
1963 do {
1964 pos++;
1965 } while (*pos && !is_dir_sep(*pos));
1966
1967 offset = pos - path;
1968 }
1969
1970 return offset + is_dir_sep(path[offset]);
1971 }
1972
1973 int xutftowcsn(wchar_t *wcs, const char *utfs, size_t wcslen, int utflen)
1974 {
1975 int upos = 0, wpos = 0;
1976 const unsigned char *utf = (const unsigned char*) utfs;
1977 if (!utf || !wcs || wcslen < 1) {
1978 errno = EINVAL;
1979 return -1;
1980 }
1981 /* reserve space for \0 */
1982 wcslen--;
1983 if (utflen < 0)
1984 utflen = INT_MAX;
1985
1986 while (upos < utflen) {
1987 int c = utf[upos++] & 0xff;
1988 if (utflen == INT_MAX && c == 0)
1989 break;
1990
1991 if (wpos >= wcslen) {
1992 wcs[wpos] = 0;
1993 errno = ERANGE;
1994 return -1;
1995 }
1996
1997 if (c < 0x80) {
1998 /* ASCII */
1999 wcs[wpos++] = c;
2000 } else if (c >= 0xc2 && c < 0xe0 && upos < utflen &&
2001 (utf[upos] & 0xc0) == 0x80) {
2002 /* 2-byte utf-8 */
2003 c = ((c & 0x1f) << 6);
2004 c |= (utf[upos++] & 0x3f);
2005 wcs[wpos++] = c;
2006 } else if (c >= 0xe0 && c < 0xf0 && upos + 1 < utflen &&
2007 !(c == 0xe0 && utf[upos] < 0xa0) && /* over-long encoding */
2008 (utf[upos] & 0xc0) == 0x80 &&
2009 (utf[upos + 1] & 0xc0) == 0x80) {
2010 /* 3-byte utf-8 */
2011 c = ((c & 0x0f) << 12);
2012 c |= ((utf[upos++] & 0x3f) << 6);
2013 c |= (utf[upos++] & 0x3f);
2014 wcs[wpos++] = c;
2015 } else if (c >= 0xf0 && c < 0xf5 && upos + 2 < utflen &&
2016 wpos + 1 < wcslen &&
2017 !(c == 0xf0 && utf[upos] < 0x90) && /* over-long encoding */
2018 !(c == 0xf4 && utf[upos] >= 0x90) && /* > \u10ffff */
2019 (utf[upos] & 0xc0) == 0x80 &&
2020 (utf[upos + 1] & 0xc0) == 0x80 &&
2021 (utf[upos + 2] & 0xc0) == 0x80) {
2022 /* 4-byte utf-8: convert to \ud8xx \udcxx surrogate pair */
2023 c = ((c & 0x07) << 18);
2024 c |= ((utf[upos++] & 0x3f) << 12);
2025 c |= ((utf[upos++] & 0x3f) << 6);
2026 c |= (utf[upos++] & 0x3f);
2027 c -= 0x10000;
2028 wcs[wpos++] = 0xd800 | (c >> 10);
2029 wcs[wpos++] = 0xdc00 | (c & 0x3ff);
2030 } else if (c >= 0xa0) {
2031 /* invalid utf-8 byte, printable unicode char: convert 1:1 */
2032 wcs[wpos++] = c;
2033 } else {
2034 /* invalid utf-8 byte, non-printable unicode: convert to hex */
2035 static const char *hex = "0123456789abcdef";
2036 wcs[wpos++] = hex[c >> 4];
2037 if (wpos < wcslen)
2038 wcs[wpos++] = hex[c & 0x0f];
2039 }
2040 }
2041 wcs[wpos] = 0;
2042 return wpos;
2043 }
2044
2045 int xwcstoutf(char *utf, const wchar_t *wcs, size_t utflen)
2046 {
2047 if (!wcs || !utf || utflen < 1) {
2048 errno = EINVAL;
2049 return -1;
2050 }
2051 utflen = WideCharToMultiByte(CP_UTF8, 0, wcs, -1, utf, utflen, NULL, NULL);
2052 if (utflen)
2053 return utflen - 1;
2054 errno = ERANGE;
2055 return -1;
2056 }
2057
2058 /*
2059 * Disable MSVCRT command line wildcard expansion (__getmainargs called from
2060 * mingw startup code, see init.c in mingw runtime).
2061 */
2062 int _CRT_glob = 0;
2063
2064 typedef struct {
2065 int newmode;
2066 } _startupinfo;
2067
2068 extern int __wgetmainargs(int *argc, wchar_t ***argv, wchar_t ***env, int glob,
2069 _startupinfo *si);
2070
2071 void mingw_startup()
2072 {
2073 int i, len, maxlen, argc;
2074 char *buffer;
2075 wchar_t **wenv, **wargv;
2076 _startupinfo si;
2077
2078 /* get wide char arguments and environment */
2079 si.newmode = 0;
2080 __wgetmainargs(&argc, &wargv, &wenv, _CRT_glob, &si);
2081
2082 /* determine size of argv and environ conversion buffer */
2083 maxlen = wcslen(_wpgmptr);
2084 for (i = 1; i < argc; i++)
2085 maxlen = max(maxlen, wcslen(wargv[i]));
2086 for (i = 0; wenv[i]; i++)
2087 maxlen = max(maxlen, wcslen(wenv[i]));
2088
2089 /* nedmalloc can't free CRT memory, allocate resizable environment list */
2090 environ = NULL;
2091 environ_size = i + 1;
2092 ALLOC_GROW(environ, environ_size * sizeof(char*), environ_alloc);
2093
2094 /* allocate buffer (wchar_t encodes to max 3 UTF-8 bytes) */
2095 maxlen = 3 * maxlen + 1;
2096 buffer = xmalloc(maxlen);
2097
2098 /* convert command line arguments and environment to UTF-8 */
2099 len = xwcstoutf(buffer, _wpgmptr, maxlen);
2100 __argv[0] = xmemdupz(buffer, len);
2101 for (i = 1; i < argc; i++) {
2102 len = xwcstoutf(buffer, wargv[i], maxlen);
2103 __argv[i] = xmemdupz(buffer, len);
2104 }
2105 for (i = 0; wenv[i]; i++) {
2106 len = xwcstoutf(buffer, wenv[i], maxlen);
2107 environ[i] = xmemdupz(buffer, len);
2108 }
2109 environ[i] = NULL;
2110 free(buffer);
2111
2112 /* sort environment for O(log n) getenv / putenv */
2113 qsort(environ, i, sizeof(char*), compareenv);
2114
2115 /* fix Windows specific environment settings */
2116
2117 /* on Windows it is TMP and TEMP */
2118 if (!getenv("TMPDIR")) {
2119 const char *tmp = getenv("TMP");
2120 if (!tmp)
2121 tmp = getenv("TEMP");
2122 if (tmp)
2123 setenv("TMPDIR", tmp, 1);
2124 }
2125
2126 /* simulate TERM to enable auto-color (see color.c) */
2127 if (!getenv("TERM"))
2128 setenv("TERM", "winansi", 1);
2129
2130 /* initialize critical section for waitpid pinfo_t list */
2131 InitializeCriticalSection(&pinfo_cs);
2132
2133 /* set up default file mode and file modes for stdin/out/err */
2134 _fmode = _O_BINARY;
2135 _setmode(_fileno(stdin), _O_BINARY);
2136 _setmode(_fileno(stdout), _O_BINARY);
2137 _setmode(_fileno(stderr), _O_BINARY);
2138
2139 /* initialize Unicode console */
2140 winansi_init();
2141 }
My patches to 4msysgit