]> git.ipfire.org Git - thirdparty/git.git/blob - compat/mingw.c
projects / thirdparty / git.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
Sync with 2.19.3
[thirdparty/git.git] / compat / mingw.c
1 #include "../git-compat-util.h"
2 #include "win32.h"
3 #include <conio.h>
4 #include <wchar.h>
5 #include "../strbuf.h"
6 #include "../run-command.h"
7 #include "../cache.h"
8 #include "win32/lazyload.h"
9 #include "../config.h"
10
11 #define HCAST(type, handle) ((type)(intptr_t)handle)
12
13 static const int delay[] = { 0, 1, 10, 20, 40 };
14
15 int err_win_to_posix(DWORD winerr)
16 {
17 int error = ENOSYS;
18 switch(winerr) {
19 case ERROR_ACCESS_DENIED: error = EACCES; break;
20 case ERROR_ACCOUNT_DISABLED: error = EACCES; break;
21 case ERROR_ACCOUNT_RESTRICTION: error = EACCES; break;
22 case ERROR_ALREADY_ASSIGNED: error = EBUSY; break;
23 case ERROR_ALREADY_EXISTS: error = EEXIST; break;
24 case ERROR_ARITHMETIC_OVERFLOW: error = ERANGE; break;
25 case ERROR_BAD_COMMAND: error = EIO; break;
26 case ERROR_BAD_DEVICE: error = ENODEV; break;
27 case ERROR_BAD_DRIVER_LEVEL: error = ENXIO; break;
28 case ERROR_BAD_EXE_FORMAT: error = ENOEXEC; break;
29 case ERROR_BAD_FORMAT: error = ENOEXEC; break;
30 case ERROR_BAD_LENGTH: error = EINVAL; break;
31 case ERROR_BAD_PATHNAME: error = ENOENT; break;
32 case ERROR_BAD_PIPE: error = EPIPE; break;
33 case ERROR_BAD_UNIT: error = ENODEV; break;
34 case ERROR_BAD_USERNAME: error = EINVAL; break;
35 case ERROR_BROKEN_PIPE: error = EPIPE; break;
36 case ERROR_BUFFER_OVERFLOW: error = ENAMETOOLONG; break;
37 case ERROR_BUSY: error = EBUSY; break;
38 case ERROR_BUSY_DRIVE: error = EBUSY; break;
39 case ERROR_CALL_NOT_IMPLEMENTED: error = ENOSYS; break;
40 case ERROR_CANNOT_MAKE: error = EACCES; break;
41 case ERROR_CANTOPEN: error = EIO; break;
42 case ERROR_CANTREAD: error = EIO; break;
43 case ERROR_CANTWRITE: error = EIO; break;
44 case ERROR_CRC: error = EIO; break;
45 case ERROR_CURRENT_DIRECTORY: error = EACCES; break;
46 case ERROR_DEVICE_IN_USE: error = EBUSY; break;
47 case ERROR_DEV_NOT_EXIST: error = ENODEV; break;
48 case ERROR_DIRECTORY: error = EINVAL; break;
49 case ERROR_DIR_NOT_EMPTY: error = ENOTEMPTY; break;
50 case ERROR_DISK_CHANGE: error = EIO; break;
51 case ERROR_DISK_FULL: error = ENOSPC; break;
52 case ERROR_DRIVE_LOCKED: error = EBUSY; break;
53 case ERROR_ENVVAR_NOT_FOUND: error = EINVAL; break;
54 case ERROR_EXE_MARKED_INVALID: error = ENOEXEC; break;
55 case ERROR_FILENAME_EXCED_RANGE: error = ENAMETOOLONG; break;
56 case ERROR_FILE_EXISTS: error = EEXIST; break;
57 case ERROR_FILE_INVALID: error = ENODEV; break;
58 case ERROR_FILE_NOT_FOUND: error = ENOENT; break;
59 case ERROR_GEN_FAILURE: error = EIO; break;
60 case ERROR_HANDLE_DISK_FULL: error = ENOSPC; break;
61 case ERROR_INSUFFICIENT_BUFFER: error = ENOMEM; break;
62 case ERROR_INVALID_ACCESS: error = EACCES; break;
63 case ERROR_INVALID_ADDRESS: error = EFAULT; break;
64 case ERROR_INVALID_BLOCK: error = EFAULT; break;
65 case ERROR_INVALID_DATA: error = EINVAL; break;
66 case ERROR_INVALID_DRIVE: error = ENODEV; break;
67 case ERROR_INVALID_EXE_SIGNATURE: error = ENOEXEC; break;
68 case ERROR_INVALID_FLAGS: error = EINVAL; break;
69 case ERROR_INVALID_FUNCTION: error = ENOSYS; break;
70 case ERROR_INVALID_HANDLE: error = EBADF; break;
71 case ERROR_INVALID_LOGON_HOURS: error = EACCES; break;
72 case ERROR_INVALID_NAME: error = EINVAL; break;
73 case ERROR_INVALID_OWNER: error = EINVAL; break;
74 case ERROR_INVALID_PARAMETER: error = EINVAL; break;
75 case ERROR_INVALID_PASSWORD: error = EPERM; break;
76 case ERROR_INVALID_PRIMARY_GROUP: error = EINVAL; break;
77 case ERROR_INVALID_SIGNAL_NUMBER: error = EINVAL; break;
78 case ERROR_INVALID_TARGET_HANDLE: error = EIO; break;
79 case ERROR_INVALID_WORKSTATION: error = EACCES; break;
80 case ERROR_IO_DEVICE: error = EIO; break;
81 case ERROR_IO_INCOMPLETE: error = EINTR; break;
82 case ERROR_LOCKED: error = EBUSY; break;
83 case ERROR_LOCK_VIOLATION: error = EACCES; break;
84 case ERROR_LOGON_FAILURE: error = EACCES; break;
85 case ERROR_MAPPED_ALIGNMENT: error = EINVAL; break;
86 case ERROR_META_EXPANSION_TOO_LONG: error = E2BIG; break;
87 case ERROR_MORE_DATA: error = EPIPE; break;
88 case ERROR_NEGATIVE_SEEK: error = ESPIPE; break;
89 case ERROR_NOACCESS: error = EFAULT; break;
90 case ERROR_NONE_MAPPED: error = EINVAL; break;
91 case ERROR_NOT_ENOUGH_MEMORY: error = ENOMEM; break;
92 case ERROR_NOT_READY: error = EAGAIN; break;
93 case ERROR_NOT_SAME_DEVICE: error = EXDEV; break;
94 case ERROR_NO_DATA: error = EPIPE; break;
95 case ERROR_NO_MORE_SEARCH_HANDLES: error = EIO; break;
96 case ERROR_NO_PROC_SLOTS: error = EAGAIN; break;
97 case ERROR_NO_SUCH_PRIVILEGE: error = EACCES; break;
98 case ERROR_OPEN_FAILED: error = EIO; break;
99 case ERROR_OPEN_FILES: error = EBUSY; break;
100 case ERROR_OPERATION_ABORTED: error = EINTR; break;
101 case ERROR_OUTOFMEMORY: error = ENOMEM; break;
102 case ERROR_PASSWORD_EXPIRED: error = EACCES; break;
103 case ERROR_PATH_BUSY: error = EBUSY; break;
104 case ERROR_PATH_NOT_FOUND: error = ENOENT; break;
105 case ERROR_PIPE_BUSY: error = EBUSY; break;
106 case ERROR_PIPE_CONNECTED: error = EPIPE; break;
107 case ERROR_PIPE_LISTENING: error = EPIPE; break;
108 case ERROR_PIPE_NOT_CONNECTED: error = EPIPE; break;
109 case ERROR_PRIVILEGE_NOT_HELD: error = EACCES; break;
110 case ERROR_READ_FAULT: error = EIO; break;
111 case ERROR_SEEK: error = EIO; break;
112 case ERROR_SEEK_ON_DEVICE: error = ESPIPE; break;
113 case ERROR_SHARING_BUFFER_EXCEEDED: error = ENFILE; break;
114 case ERROR_SHARING_VIOLATION: error = EACCES; break;
115 case ERROR_STACK_OVERFLOW: error = ENOMEM; break;
116 case ERROR_SWAPERROR: error = ENOENT; break;
117 case ERROR_TOO_MANY_MODULES: error = EMFILE; break;
118 case ERROR_TOO_MANY_OPEN_FILES: error = EMFILE; break;
119 case ERROR_UNRECOGNIZED_MEDIA: error = ENXIO; break;
120 case ERROR_UNRECOGNIZED_VOLUME: error = ENODEV; break;
121 case ERROR_WAIT_NO_CHILDREN: error = ECHILD; break;
122 case ERROR_WRITE_FAULT: error = EIO; break;
123 case ERROR_WRITE_PROTECT: error = EROFS; break;
124 }
125 return error;
126 }
127
128 static inline int is_file_in_use_error(DWORD errcode)
129 {
130 switch (errcode) {
131 case ERROR_SHARING_VIOLATION:
132 case ERROR_ACCESS_DENIED:
133 return 1;
134 }
135
136 return 0;
137 }
138
139 static int read_yes_no_answer(void)
140 {
141 char answer[1024];
142
143 if (fgets(answer, sizeof(answer), stdin)) {
144 size_t answer_len = strlen(answer);
145 int got_full_line = 0, c;
146
147 /* remove the newline */
148 if (answer_len >= 2 && answer[answer_len-2] == '\r') {
149 answer[answer_len-2] = '\0';
150 got_full_line = 1;
151 } else if (answer_len >= 1 && answer[answer_len-1] == '\n') {
152 answer[answer_len-1] = '\0';
153 got_full_line = 1;
154 }
155 /* flush the buffer in case we did not get the full line */
156 if (!got_full_line)
157 while ((c = getchar()) != EOF && c != '\n')
158 ;
159 } else
160 /* we could not read, return the
161 * default answer which is no */
162 return 0;
163
164 if (tolower(answer[0]) == 'y' && !answer[1])
165 return 1;
166 if (!strncasecmp(answer, "yes", sizeof(answer)))
167 return 1;
168 if (tolower(answer[0]) == 'n' && !answer[1])
169 return 0;
170 if (!strncasecmp(answer, "no", sizeof(answer)))
171 return 0;
172
173 /* did not find an answer we understand */
174 return -1;
175 }
176
177 static int ask_yes_no_if_possible(const char *format, ...)
178 {
179 char question[4096];
180 const char *retry_hook[] = { NULL, NULL, NULL };
181 va_list args;
182
183 va_start(args, format);
184 vsnprintf(question, sizeof(question), format, args);
185 va_end(args);
186
187 if ((retry_hook[0] = mingw_getenv("GIT_ASK_YESNO"))) {
188 retry_hook[1] = question;
189 return !run_command_v_opt(retry_hook, 0);
190 }
191
192 if (!isatty(_fileno(stdin)) || !isatty(_fileno(stderr)))
193 return 0;
194
195 while (1) {
196 int answer;
197 fprintf(stderr, "%s (y/n) ", question);
198
199 if ((answer = read_yes_no_answer()) >= 0)
200 return answer;
201
202 fprintf(stderr, "Sorry, I did not understand your answer. "
203 "Please type 'y' or 'n'\n");
204 }
205 }
206
207 /* Windows only */
208 enum hide_dotfiles_type {
209 HIDE_DOTFILES_FALSE = 0,
210 HIDE_DOTFILES_TRUE,
211 HIDE_DOTFILES_DOTGITONLY
212 };
213
214 static enum hide_dotfiles_type hide_dotfiles = HIDE_DOTFILES_DOTGITONLY;
215 static char *unset_environment_variables;
216
217 int mingw_core_config(const char *var, const char *value, void *cb)
218 {
219 if (!strcmp(var, "core.hidedotfiles")) {
220 if (value && !strcasecmp(value, "dotgitonly"))
221 hide_dotfiles = HIDE_DOTFILES_DOTGITONLY;
222 else
223 hide_dotfiles = git_config_bool(var, value);
224 return 0;
225 }
226
227 if (!strcmp(var, "core.unsetenvvars")) {
228 free(unset_environment_variables);
229 unset_environment_variables = xstrdup(value);
230 return 0;
231 }
232
233 return 0;
234 }
235
236 /* Normalizes NT paths as returned by some low-level APIs. */
237 static wchar_t *normalize_ntpath(wchar_t *wbuf)
238 {
239 int i;
240 /* fix absolute path prefixes */
241 if (wbuf[0] == '\\') {
242 /* strip NT namespace prefixes */
243 if (!wcsncmp(wbuf, L"\\??\\", 4) ||
244 !wcsncmp(wbuf, L"\\\\?\\", 4))
245 wbuf += 4;
246 else if (!wcsnicmp(wbuf, L"\\DosDevices\\", 12))
247 wbuf += 12;
248 /* replace remaining '...UNC\' with '\\' */
249 if (!wcsnicmp(wbuf, L"UNC\\", 4)) {
250 wbuf += 2;
251 *wbuf = '\\';
252 }
253 }
254 /* convert backslashes to slashes */
255 for (i = 0; wbuf[i]; i++)
256 if (wbuf[i] == '\\')
257 wbuf[i] = '/';
258 return wbuf;
259 }
260
261 int mingw_unlink(const char *pathname)
262 {
263 int ret, tries = 0;
264 wchar_t wpathname[MAX_PATH];
265 if (xutftowcs_path(wpathname, pathname) < 0)
266 return -1;
267
268 /* read-only files cannot be removed */
269 _wchmod(wpathname, 0666);
270 while ((ret = _wunlink(wpathname)) == -1 && tries < ARRAY_SIZE(delay)) {
271 if (!is_file_in_use_error(GetLastError()))
272 break;
273 /*
274 * We assume that some other process had the source or
275 * destination file open at the wrong moment and retry.
276 * In order to give the other process a higher chance to
277 * complete its operation, we give up our time slice now.
278 * If we have to retry again, we do sleep a bit.
279 */
280 Sleep(delay[tries]);
281 tries++;
282 }
283 while (ret == -1 && is_file_in_use_error(GetLastError()) &&
284 ask_yes_no_if_possible("Unlink of file '%s' failed. "
285 "Should I try again?", pathname))
286 ret = _wunlink(wpathname);
287 return ret;
288 }
289
290 static int is_dir_empty(const wchar_t *wpath)
291 {
292 WIN32_FIND_DATAW findbuf;
293 HANDLE handle;
294 wchar_t wbuf[MAX_PATH + 2];
295 wcscpy(wbuf, wpath);
296 wcscat(wbuf, L"\\*");
297 handle = FindFirstFileW(wbuf, &findbuf);
298 if (handle == INVALID_HANDLE_VALUE)
299 return GetLastError() == ERROR_NO_MORE_FILES;
300
301 while (!wcscmp(findbuf.cFileName, L".") ||
302 !wcscmp(findbuf.cFileName, L".."))
303 if (!FindNextFileW(handle, &findbuf)) {
304 DWORD err = GetLastError();
305 FindClose(handle);
306 return err == ERROR_NO_MORE_FILES;
307 }
308 FindClose(handle);
309 return 0;
310 }
311
312 int mingw_rmdir(const char *pathname)
313 {
314 int ret, tries = 0;
315 wchar_t wpathname[MAX_PATH];
316 if (xutftowcs_path(wpathname, pathname) < 0)
317 return -1;
318
319 while ((ret = _wrmdir(wpathname)) == -1 && tries < ARRAY_SIZE(delay)) {
320 if (!is_file_in_use_error(GetLastError()))
321 errno = err_win_to_posix(GetLastError());
322 if (errno != EACCES)
323 break;
324 if (!is_dir_empty(wpathname)) {
325 errno = ENOTEMPTY;
326 break;
327 }
328 /*
329 * We assume that some other process had the source or
330 * destination file open at the wrong moment and retry.
331 * In order to give the other process a higher chance to
332 * complete its operation, we give up our time slice now.
333 * If we have to retry again, we do sleep a bit.
334 */
335 Sleep(delay[tries]);
336 tries++;
337 }
338 while (ret == -1 && errno == EACCES && is_file_in_use_error(GetLastError()) &&
339 ask_yes_no_if_possible("Deletion of directory '%s' failed. "
340 "Should I try again?", pathname))
341 ret = _wrmdir(wpathname);
342 return ret;
343 }
344
345 static inline int needs_hiding(const char *path)
346 {
347 const char *basename;
348
349 if (hide_dotfiles == HIDE_DOTFILES_FALSE)
350 return 0;
351
352 /* We cannot use basename(), as it would remove trailing slashes */
353 mingw_skip_dos_drive_prefix((char **)&path);
354 if (!*path)
355 return 0;
356
357 for (basename = path; *path; path++)
358 if (is_dir_sep(*path)) {
359 do {
360 path++;
361 } while (is_dir_sep(*path));
362 /* ignore trailing slashes */
363 if (*path)
364 basename = path;
365 }
366
367 if (hide_dotfiles == HIDE_DOTFILES_TRUE)
368 return *basename == '.';
369
370 assert(hide_dotfiles == HIDE_DOTFILES_DOTGITONLY);
371 return !strncasecmp(".git", basename, 4) &&
372 (!basename[4] || is_dir_sep(basename[4]));
373 }
374
375 static int set_hidden_flag(const wchar_t *path, int set)
376 {
377 DWORD original = GetFileAttributesW(path), modified;
378 if (set)
379 modified = original | FILE_ATTRIBUTE_HIDDEN;
380 else
381 modified = original & ~FILE_ATTRIBUTE_HIDDEN;
382 if (original == modified || SetFileAttributesW(path, modified))
383 return 0;
384 errno = err_win_to_posix(GetLastError());
385 return -1;
386 }
387
388 int mingw_mkdir(const char *path, int mode)
389 {
390 int ret;
391 wchar_t wpath[MAX_PATH];
392
393 if (!is_valid_win32_path(path)) {
394 errno = EINVAL;
395 return -1;
396 }
397
398 if (xutftowcs_path(wpath, path) < 0)
399 return -1;
400 ret = _wmkdir(wpath);
401 if (!ret && needs_hiding(path))
402 return set_hidden_flag(wpath, 1);
403 return ret;
404 }
405
406 /*
407 * Calling CreateFile() using FILE_APPEND_DATA and without FILE_WRITE_DATA
408 * is documented in [1] as opening a writable file handle in append mode.
409 * (It is believed that) this is atomic since it is maintained by the
410 * kernel unlike the O_APPEND flag which is racily maintained by the CRT.
411 *
412 * [1] https://docs.microsoft.com/en-us/windows/desktop/fileio/file-access-rights-constants
413 *
414 * This trick does not appear to work for named pipes. Instead it creates
415 * a named pipe client handle that cannot be written to. Callers should
416 * just use the regular _wopen() for them. (And since client handle gets
417 * bound to a unique server handle, it isn't really an issue.)
418 */
419 static int mingw_open_append(wchar_t const *wfilename, int oflags, ...)
420 {
421 HANDLE handle;
422 int fd;
423 DWORD create = (oflags & O_CREAT) ? OPEN_ALWAYS : OPEN_EXISTING;
424
425 /* only these flags are supported */
426 if ((oflags & ~O_CREAT) != (O_WRONLY | O_APPEND))
427 return errno = ENOSYS, -1;
428
429 /*
430 * FILE_SHARE_WRITE is required to permit child processes
431 * to append to the file.
432 */
433 handle = CreateFileW(wfilename, FILE_APPEND_DATA,
434 FILE_SHARE_WRITE | FILE_SHARE_READ,
435 NULL, create, FILE_ATTRIBUTE_NORMAL, NULL);
436 if (handle == INVALID_HANDLE_VALUE)
437 return errno = err_win_to_posix(GetLastError()), -1;
438
439 /*
440 * No O_APPEND here, because the CRT uses it only to reset the
441 * file pointer to EOF before each write(); but that is not
442 * necessary (and may lead to races) for a file created with
443 * FILE_APPEND_DATA.
444 */
445 fd = _open_osfhandle((intptr_t)handle, O_BINARY);
446 if (fd < 0)
447 CloseHandle(handle);
448 return fd;
449 }
450
451 /*
452 * Does the pathname map to the local named pipe filesystem?
453 * That is, does it have a "//./pipe/" prefix?
454 */
455 static int is_local_named_pipe_path(const char *filename)
456 {
457 return (is_dir_sep(filename[0]) &&
458 is_dir_sep(filename[1]) &&
459 filename[2] == '.' &&
460 is_dir_sep(filename[3]) &&
461 !strncasecmp(filename+4, "pipe", 4) &&
462 is_dir_sep(filename[8]) &&
463 filename[9]);
464 }
465
466 int mingw_open (const char *filename, int oflags, ...)
467 {
468 typedef int (*open_fn_t)(wchar_t const *wfilename, int oflags, ...);
469 va_list args;
470 unsigned mode;
471 int fd, create = (oflags & (O_CREAT | O_EXCL)) == (O_CREAT | O_EXCL);
472 wchar_t wfilename[MAX_PATH];
473 open_fn_t open_fn;
474
475 va_start(args, oflags);
476 mode = va_arg(args, int);
477 va_end(args);
478
479 if (!is_valid_win32_path(filename)) {
480 errno = create ? EINVAL : ENOENT;
481 return -1;
482 }
483
484 if (filename && !strcmp(filename, "/dev/null"))
485 filename = "nul";
486
487 if ((oflags & O_APPEND) && !is_local_named_pipe_path(filename))
488 open_fn = mingw_open_append;
489 else
490 open_fn = _wopen;
491
492 if (xutftowcs_path(wfilename, filename) < 0)
493 return -1;
494 fd = open_fn(wfilename, oflags, mode);
495
496 if (fd < 0 && (oflags & O_ACCMODE) != O_RDONLY && errno == EACCES) {
497 DWORD attrs = GetFileAttributesW(wfilename);
498 if (attrs != INVALID_FILE_ATTRIBUTES && (attrs & FILE_ATTRIBUTE_DIRECTORY))
499 errno = EISDIR;
500 }
501 if ((oflags & O_CREAT) && needs_hiding(filename)) {
502 /*
503 * Internally, _wopen() uses the CreateFile() API which errors
504 * out with an ERROR_ACCESS_DENIED if CREATE_ALWAYS was
505 * specified and an already existing file's attributes do not
506 * match *exactly*. As there is no mode or flag we can set that
507 * would correspond to FILE_ATTRIBUTE_HIDDEN, let's just try
508 * again *without* the O_CREAT flag (that corresponds to the
509 * CREATE_ALWAYS flag of CreateFile()).
510 */
511 if (fd < 0 && errno == EACCES)
512 fd = open_fn(wfilename, oflags & ~O_CREAT, mode);
513 if (fd >= 0 && set_hidden_flag(wfilename, 1))
514 warning("could not mark '%s' as hidden.", filename);
515 }
516 return fd;
517 }
518
519 static BOOL WINAPI ctrl_ignore(DWORD type)
520 {
521 return TRUE;
522 }
523
524 #undef fgetc
525 int mingw_fgetc(FILE *stream)
526 {
527 int ch;
528 if (!isatty(_fileno(stream)))
529 return fgetc(stream);
530
531 SetConsoleCtrlHandler(ctrl_ignore, TRUE);
532 while (1) {
533 ch = fgetc(stream);
534 if (ch != EOF || GetLastError() != ERROR_OPERATION_ABORTED)
535 break;
536
537 /* Ctrl+C was pressed, simulate SIGINT and retry */
538 mingw_raise(SIGINT);
539 }
540 SetConsoleCtrlHandler(ctrl_ignore, FALSE);
541 return ch;
542 }
543
544 #undef fopen
545 FILE *mingw_fopen (const char *filename, const char *otype)
546 {
547 int hide = needs_hiding(filename);
548 FILE *file;
549 wchar_t wfilename[MAX_PATH], wotype[4];
550 if (!is_valid_win32_path(filename)) {
551 int create = otype && strchr(otype, 'w');
552 errno = create ? EINVAL : ENOENT;
553 return NULL;
554 }
555 if (filename && !strcmp(filename, "/dev/null"))
556 filename = "nul";
557 if (xutftowcs_path(wfilename, filename) < 0 ||
558 xutftowcs(wotype, otype, ARRAY_SIZE(wotype)) < 0)
559 return NULL;
560 if (hide && !access(filename, F_OK) && set_hidden_flag(wfilename, 0)) {
561 error("could not unhide %s", filename);
562 return NULL;
563 }
564 file = _wfopen(wfilename, wotype);
565 if (!file && GetLastError() == ERROR_INVALID_NAME)
566 errno = ENOENT;
567 if (file && hide && set_hidden_flag(wfilename, 1))
568 warning("could not mark '%s' as hidden.", filename);
569 return file;
570 }
571
572 FILE *mingw_freopen (const char *filename, const char *otype, FILE *stream)
573 {
574 int hide = needs_hiding(filename);
575 FILE *file;
576 wchar_t wfilename[MAX_PATH], wotype[4];
577 if (!is_valid_win32_path(filename)) {
578 int create = otype && strchr(otype, 'w');
579 errno = create ? EINVAL : ENOENT;
580 return NULL;
581 }
582 if (filename && !strcmp(filename, "/dev/null"))
583 filename = "nul";
584 if (xutftowcs_path(wfilename, filename) < 0 ||
585 xutftowcs(wotype, otype, ARRAY_SIZE(wotype)) < 0)
586 return NULL;
587 if (hide && !access(filename, F_OK) && set_hidden_flag(wfilename, 0)) {
588 error("could not unhide %s", filename);
589 return NULL;
590 }
591 file = _wfreopen(wfilename, wotype, stream);
592 if (file && hide && set_hidden_flag(wfilename, 1))
593 warning("could not mark '%s' as hidden.", filename);
594 return file;
595 }
596
597 #undef fflush
598 int mingw_fflush(FILE *stream)
599 {
600 int ret = fflush(stream);
601
602 /*
603 * write() is used behind the scenes of stdio output functions.
604 * Since git code does not check for errors after each stdio write
605 * operation, it can happen that write() is called by a later
606 * stdio function even if an earlier write() call failed. In the
607 * case of a pipe whose readable end was closed, only the first
608 * call to write() reports EPIPE on Windows. Subsequent write()
609 * calls report EINVAL. It is impossible to notice whether this
610 * fflush invocation triggered such a case, therefore, we have to
611 * catch all EINVAL errors whole-sale.
612 */
613 if (ret && errno == EINVAL)
614 errno = EPIPE;
615
616 return ret;
617 }
618
619 #undef write
620 ssize_t mingw_write(int fd, const void *buf, size_t len)
621 {
622 ssize_t result = write(fd, buf, len);
623
624 if (result < 0 && errno == EINVAL && buf) {
625 /* check if fd is a pipe */
626 HANDLE h = (HANDLE) _get_osfhandle(fd);
627 if (GetFileType(h) == FILE_TYPE_PIPE)
628 errno = EPIPE;
629 else
630 errno = EINVAL;
631 }
632
633 return result;
634 }
635
636 int mingw_access(const char *filename, int mode)
637 {
638 wchar_t wfilename[MAX_PATH];
639 if (xutftowcs_path(wfilename, filename) < 0)
640 return -1;
641 /* X_OK is not supported by the MSVCRT version */
642 return _waccess(wfilename, mode & ~X_OK);
643 }
644
645 int mingw_chdir(const char *dirname)
646 {
647 wchar_t wdirname[MAX_PATH];
648 if (xutftowcs_path(wdirname, dirname) < 0)
649 return -1;
650 return _wchdir(wdirname);
651 }
652
653 int mingw_chmod(const char *filename, int mode)
654 {
655 wchar_t wfilename[MAX_PATH];
656 if (xutftowcs_path(wfilename, filename) < 0)
657 return -1;
658 return _wchmod(wfilename, mode);
659 }
660
661 /*
662 * The unit of FILETIME is 100-nanoseconds since January 1, 1601, UTC.
663 * Returns the 100-nanoseconds ("hekto nanoseconds") since the epoch.
664 */
665 static inline long long filetime_to_hnsec(const FILETIME *ft)
666 {
667 long long winTime = ((long long)ft->dwHighDateTime << 32) + ft->dwLowDateTime;
668 /* Windows to Unix Epoch conversion */
669 return winTime - 116444736000000000LL;
670 }
671
672 static inline void filetime_to_timespec(const FILETIME *ft, struct timespec *ts)
673 {
674 long long hnsec = filetime_to_hnsec(ft);
675 ts->tv_sec = (time_t)(hnsec / 10000000);
676 ts->tv_nsec = (hnsec % 10000000) * 100;
677 }
678
679 /**
680 * Verifies that safe_create_leading_directories() would succeed.
681 */
682 static int has_valid_directory_prefix(wchar_t *wfilename)
683 {
684 int n = wcslen(wfilename);
685
686 while (n > 0) {
687 wchar_t c = wfilename[--n];
688 DWORD attributes;
689
690 if (!is_dir_sep(c))
691 continue;
692
693 wfilename[n] = L'\0';
694 attributes = GetFileAttributesW(wfilename);
695 wfilename[n] = c;
696 if (attributes == FILE_ATTRIBUTE_DIRECTORY ||
697 attributes == FILE_ATTRIBUTE_DEVICE)
698 return 1;
699 if (attributes == INVALID_FILE_ATTRIBUTES)
700 switch (GetLastError()) {
701 case ERROR_PATH_NOT_FOUND:
702 continue;
703 case ERROR_FILE_NOT_FOUND:
704 /* This implies parent directory exists. */
705 return 1;
706 }
707 return 0;
708 }
709 return 1;
710 }
711
712 /* We keep the do_lstat code in a separate function to avoid recursion.
713 * When a path ends with a slash, the stat will fail with ENOENT. In
714 * this case, we strip the trailing slashes and stat again.
715 *
716 * If follow is true then act like stat() and report on the link
717 * target. Otherwise report on the link itself.
718 */
719 static int do_lstat(int follow, const char *file_name, struct stat *buf)
720 {
721 WIN32_FILE_ATTRIBUTE_DATA fdata;
722 wchar_t wfilename[MAX_PATH];
723 if (xutftowcs_path(wfilename, file_name) < 0)
724 return -1;
725
726 if (GetFileAttributesExW(wfilename, GetFileExInfoStandard, &fdata)) {
727 buf->st_ino = 0;
728 buf->st_gid = 0;
729 buf->st_uid = 0;
730 buf->st_nlink = 1;
731 buf->st_mode = file_attr_to_st_mode(fdata.dwFileAttributes);
732 buf->st_size = fdata.nFileSizeLow |
733 (((off_t)fdata.nFileSizeHigh)<<32);
734 buf->st_dev = buf->st_rdev = 0; /* not used by Git */
735 filetime_to_timespec(&(fdata.ftLastAccessTime), &(buf->st_atim));
736 filetime_to_timespec(&(fdata.ftLastWriteTime), &(buf->st_mtim));
737 filetime_to_timespec(&(fdata.ftCreationTime), &(buf->st_ctim));
738 if (fdata.dwFileAttributes & FILE_ATTRIBUTE_REPARSE_POINT) {
739 WIN32_FIND_DATAW findbuf;
740 HANDLE handle = FindFirstFileW(wfilename, &findbuf);
741 if (handle != INVALID_HANDLE_VALUE) {
742 if ((findbuf.dwFileAttributes & FILE_ATTRIBUTE_REPARSE_POINT) &&
743 (findbuf.dwReserved0 == IO_REPARSE_TAG_SYMLINK)) {
744 if (follow) {
745 char buffer[MAXIMUM_REPARSE_DATA_BUFFER_SIZE];
746 buf->st_size = readlink(file_name, buffer, MAXIMUM_REPARSE_DATA_BUFFER_SIZE);
747 } else {
748 buf->st_mode = S_IFLNK;
749 }
750 buf->st_mode |= S_IREAD;
751 if (!(findbuf.dwFileAttributes & FILE_ATTRIBUTE_READONLY))
752 buf->st_mode |= S_IWRITE;
753 }
754 FindClose(handle);
755 }
756 }
757 return 0;
758 }
759 switch (GetLastError()) {
760 case ERROR_ACCESS_DENIED:
761 case ERROR_SHARING_VIOLATION:
762 case ERROR_LOCK_VIOLATION:
763 case ERROR_SHARING_BUFFER_EXCEEDED:
764 errno = EACCES;
765 break;
766 case ERROR_BUFFER_OVERFLOW:
767 errno = ENAMETOOLONG;
768 break;
769 case ERROR_NOT_ENOUGH_MEMORY:
770 errno = ENOMEM;
771 break;
772 case ERROR_PATH_NOT_FOUND:
773 if (!has_valid_directory_prefix(wfilename)) {
774 errno = ENOTDIR;
775 break;
776 }
777 /* fallthru */
778 default:
779 errno = ENOENT;
780 break;
781 }
782 return -1;
783 }
784
785 /* We provide our own lstat/fstat functions, since the provided
786 * lstat/fstat functions are so slow. These stat functions are
787 * tailored for Git's usage (read: fast), and are not meant to be
788 * complete. Note that Git stat()s are redirected to mingw_lstat()
789 * too, since Windows doesn't really handle symlinks that well.
790 */
791 static int do_stat_internal(int follow, const char *file_name, struct stat *buf)
792 {
793 int namelen;
794 char alt_name[PATH_MAX];
795
796 if (!do_lstat(follow, file_name, buf))
797 return 0;
798
799 /* if file_name ended in a '/', Windows returned ENOENT;
800 * try again without trailing slashes
801 */
802 if (errno != ENOENT)
803 return -1;
804
805 namelen = strlen(file_name);
806 if (namelen && file_name[namelen-1] != '/')
807 return -1;
808 while (namelen && file_name[namelen-1] == '/')
809 --namelen;
810 if (!namelen || namelen >= PATH_MAX)
811 return -1;
812
813 memcpy(alt_name, file_name, namelen);
814 alt_name[namelen] = 0;
815 return do_lstat(follow, alt_name, buf);
816 }
817
818 static int get_file_info_by_handle(HANDLE hnd, struct stat *buf)
819 {
820 BY_HANDLE_FILE_INFORMATION fdata;
821
822 if (!GetFileInformationByHandle(hnd, &fdata)) {
823 errno = err_win_to_posix(GetLastError());
824 return -1;
825 }
826
827 buf->st_ino = 0;
828 buf->st_gid = 0;
829 buf->st_uid = 0;
830 buf->st_nlink = 1;
831 buf->st_mode = file_attr_to_st_mode(fdata.dwFileAttributes);
832 buf->st_size = fdata.nFileSizeLow |
833 (((off_t)fdata.nFileSizeHigh)<<32);
834 buf->st_dev = buf->st_rdev = 0; /* not used by Git */
835 filetime_to_timespec(&(fdata.ftLastAccessTime), &(buf->st_atim));
836 filetime_to_timespec(&(fdata.ftLastWriteTime), &(buf->st_mtim));
837 filetime_to_timespec(&(fdata.ftCreationTime), &(buf->st_ctim));
838 return 0;
839 }
840
841 int mingw_lstat(const char *file_name, struct stat *buf)
842 {
843 return do_stat_internal(0, file_name, buf);
844 }
845 int mingw_stat(const char *file_name, struct stat *buf)
846 {
847 return do_stat_internal(1, file_name, buf);
848 }
849
850 int mingw_fstat(int fd, struct stat *buf)
851 {
852 HANDLE fh = (HANDLE)_get_osfhandle(fd);
853 DWORD avail, type = GetFileType(fh) & ~FILE_TYPE_REMOTE;
854
855 switch (type) {
856 case FILE_TYPE_DISK:
857 return get_file_info_by_handle(fh, buf);
858
859 case FILE_TYPE_CHAR:
860 case FILE_TYPE_PIPE:
861 /* initialize stat fields */
862 memset(buf, 0, sizeof(*buf));
863 buf->st_nlink = 1;
864
865 if (type == FILE_TYPE_CHAR) {
866 buf->st_mode = _S_IFCHR;
867 } else {
868 buf->st_mode = _S_IFIFO;
869 if (PeekNamedPipe(fh, NULL, 0, NULL, &avail, NULL))
870 buf->st_size = avail;
871 }
872 return 0;
873
874 default:
875 errno = EBADF;
876 return -1;
877 }
878 }
879
880 static inline void time_t_to_filetime(time_t t, FILETIME *ft)
881 {
882 long long winTime = t * 10000000LL + 116444736000000000LL;
883 ft->dwLowDateTime = winTime;
884 ft->dwHighDateTime = winTime >> 32;
885 }
886
887 int mingw_utime (const char *file_name, const struct utimbuf *times)
888 {
889 FILETIME mft, aft;
890 int fh, rc;
891 DWORD attrs;
892 wchar_t wfilename[MAX_PATH];
893 if (xutftowcs_path(wfilename, file_name) < 0)
894 return -1;
895
896 /* must have write permission */
897 attrs = GetFileAttributesW(wfilename);
898 if (attrs != INVALID_FILE_ATTRIBUTES &&
899 (attrs & FILE_ATTRIBUTE_READONLY)) {
900 /* ignore errors here; open() will report them */
901 SetFileAttributesW(wfilename, attrs & ~FILE_ATTRIBUTE_READONLY);
902 }
903
904 if ((fh = _wopen(wfilename, O_RDWR | O_BINARY)) < 0) {
905 rc = -1;
906 goto revert_attrs;
907 }
908
909 if (times) {
910 time_t_to_filetime(times->modtime, &mft);
911 time_t_to_filetime(times->actime, &aft);
912 } else {
913 GetSystemTimeAsFileTime(&mft);
914 aft = mft;
915 }
916 if (!SetFileTime((HANDLE)_get_osfhandle(fh), NULL, &aft, &mft)) {
917 errno = EINVAL;
918 rc = -1;
919 } else
920 rc = 0;
921 close(fh);
922
923 revert_attrs:
924 if (attrs != INVALID_FILE_ATTRIBUTES &&
925 (attrs & FILE_ATTRIBUTE_READONLY)) {
926 /* ignore errors again */
927 SetFileAttributesW(wfilename, attrs);
928 }
929 return rc;
930 }
931
932 #undef strftime
933 size_t mingw_strftime(char *s, size_t max,
934 const char *format, const struct tm *tm)
935 {
936 size_t ret = strftime(s, max, format, tm);
937
938 if (!ret && errno == EINVAL)
939 die("invalid strftime format: '%s'", format);
940 return ret;
941 }
942
943 unsigned int sleep (unsigned int seconds)
944 {
945 Sleep(seconds*1000);
946 return 0;
947 }
948
949 char *mingw_mktemp(char *template)
950 {
951 wchar_t wtemplate[MAX_PATH];
952 if (xutftowcs_path(wtemplate, template) < 0)
953 return NULL;
954 if (!_wmktemp(wtemplate))
955 return NULL;
956 if (xwcstoutf(template, wtemplate, strlen(template) + 1) < 0)
957 return NULL;
958 return template;
959 }
960
961 int mkstemp(char *template)
962 {
963 char *filename = mktemp(template);
964 if (filename == NULL)
965 return -1;
966 return open(filename, O_RDWR | O_CREAT, 0600);
967 }
968
969 int gettimeofday(struct timeval *tv, void *tz)
970 {
971 FILETIME ft;
972 long long hnsec;
973
974 GetSystemTimeAsFileTime(&ft);
975 hnsec = filetime_to_hnsec(&ft);
976 tv->tv_sec = hnsec / 10000000;
977 tv->tv_usec = (hnsec % 10000000) / 10;
978 return 0;
979 }
980
981 int pipe(int filedes[2])
982 {
983 HANDLE h[2];
984
985 /* this creates non-inheritable handles */
986 if (!CreatePipe(&h[0], &h[1], NULL, 8192)) {
987 errno = err_win_to_posix(GetLastError());
988 return -1;
989 }
990 filedes[0] = _open_osfhandle(HCAST(int, h[0]), O_NOINHERIT);
991 if (filedes[0] < 0) {
992 CloseHandle(h[0]);
993 CloseHandle(h[1]);
994 return -1;
995 }
996 filedes[1] = _open_osfhandle(HCAST(int, h[1]), O_NOINHERIT);
997 if (filedes[1] < 0) {
998 close(filedes[0]);
999 CloseHandle(h[1]);
1000 return -1;
1001 }
1002 return 0;
1003 }
1004
1005 struct tm *gmtime_r(const time_t *timep, struct tm *result)
1006 {
1007 /* gmtime() in MSVCRT.DLL is thread-safe, but not reentrant */
1008 memcpy(result, gmtime(timep), sizeof(struct tm));
1009 return result;
1010 }
1011
1012 struct tm *localtime_r(const time_t *timep, struct tm *result)
1013 {
1014 /* localtime() in MSVCRT.DLL is thread-safe, but not reentrant */
1015 memcpy(result, localtime(timep), sizeof(struct tm));
1016 return result;
1017 }
1018
1019 char *mingw_getcwd(char *pointer, int len)
1020 {
1021 wchar_t cwd[MAX_PATH], wpointer[MAX_PATH];
1022 DWORD ret = GetCurrentDirectoryW(ARRAY_SIZE(cwd), cwd);
1023
1024 if (!ret || ret >= ARRAY_SIZE(cwd)) {
1025 errno = ret ? ENAMETOOLONG : err_win_to_posix(GetLastError());
1026 return NULL;
1027 }
1028 ret = GetLongPathNameW(cwd, wpointer, ARRAY_SIZE(wpointer));
1029 if (!ret && GetLastError() == ERROR_ACCESS_DENIED) {
1030 HANDLE hnd = CreateFileW(cwd, 0,
1031 FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE, NULL,
1032 OPEN_EXISTING, FILE_FLAG_BACKUP_SEMANTICS, NULL);
1033 if (hnd == INVALID_HANDLE_VALUE)
1034 return NULL;
1035 ret = GetFinalPathNameByHandleW(hnd, wpointer, ARRAY_SIZE(wpointer), 0);
1036 CloseHandle(hnd);
1037 if (!ret || ret >= ARRAY_SIZE(wpointer))
1038 return NULL;
1039 if (xwcstoutf(pointer, normalize_ntpath(wpointer), len) < 0)
1040 return NULL;
1041 return pointer;
1042 }
1043 if (!ret || ret >= ARRAY_SIZE(wpointer))
1044 return NULL;
1045 if (xwcstoutf(pointer, wpointer, len) < 0)
1046 return NULL;
1047 convert_slashes(pointer);
1048 return pointer;
1049 }
1050
1051 /*
1052 * See "Parsing C++ Command-Line Arguments" at Microsoft's Docs:
1053 * https://docs.microsoft.com/en-us/cpp/cpp/parsing-cpp-command-line-arguments
1054 */
1055 static const char *quote_arg(const char *arg)
1056 {
1057 /* count chars to quote */
1058 int len = 0, n = 0;
1059 int force_quotes = 0;
1060 char *q, *d;
1061 const char *p = arg;
1062 if (!*p) force_quotes = 1;
1063 while (*p) {
1064 if (isspace(*p) || *p == '*' || *p == '?' || *p == '{' || *p == '\'')
1065 force_quotes = 1;
1066 else if (*p == '"')
1067 n++;
1068 else if (*p == '\\') {
1069 int count = 0;
1070 while (*p == '\\') {
1071 count++;
1072 p++;
1073 len++;
1074 }
1075 if (*p == '"' || !*p)
1076 n += count*2 + 1;
1077 continue;
1078 }
1079 len++;
1080 p++;
1081 }
1082 if (!force_quotes && n == 0)
1083 return arg;
1084
1085 /* insert \ where necessary */
1086 d = q = xmalloc(st_add3(len, n, 3));
1087 *d++ = '"';
1088 while (*arg) {
1089 if (*arg == '"')
1090 *d++ = '\\';
1091 else if (*arg == '\\') {
1092 int count = 0;
1093 while (*arg == '\\') {
1094 count++;
1095 *d++ = *arg++;
1096 }
1097 if (*arg == '"' || !*arg) {
1098 while (count-- > 0)
1099 *d++ = '\\';
1100 /* don't escape the surrounding end quote */
1101 if (!*arg)
1102 break;
1103 *d++ = '\\';
1104 }
1105 }
1106 *d++ = *arg++;
1107 }
1108 *d++ = '"';
1109 *d++ = '\0';
1110 return q;
1111 }
1112
1113 static const char *parse_interpreter(const char *cmd)
1114 {
1115 static char buf[100];
1116 char *p, *opt;
1117 int n, fd;
1118
1119 /* don't even try a .exe */
1120 n = strlen(cmd);
1121 if (n >= 4 && !strcasecmp(cmd+n-4, ".exe"))
1122 return NULL;
1123
1124 fd = open(cmd, O_RDONLY);
1125 if (fd < 0)
1126 return NULL;
1127 n = read(fd, buf, sizeof(buf)-1);
1128 close(fd);
1129 if (n < 4) /* at least '#!/x' and not error */
1130 return NULL;
1131
1132 if (buf[0] != '#' || buf[1] != '!')
1133 return NULL;
1134 buf[n] = '\0';
1135 p = buf + strcspn(buf, "\r\n");
1136 if (!*p)
1137 return NULL;
1138
1139 *p = '\0';
1140 if (!(p = strrchr(buf+2, '/')) && !(p = strrchr(buf+2, '\\')))
1141 return NULL;
1142 /* strip options */
1143 if ((opt = strchr(p+1, ' ')))
1144 *opt = '\0';
1145 return p+1;
1146 }
1147
1148 /*
1149 * exe_only means that we only want to detect .exe files, but not scripts
1150 * (which do not have an extension)
1151 */
1152 static char *lookup_prog(const char *dir, int dirlen, const char *cmd,
1153 int isexe, int exe_only)
1154 {
1155 char path[MAX_PATH];
1156 snprintf(path, sizeof(path), "%.*s\\%s.exe", dirlen, dir, cmd);
1157
1158 if (!isexe && access(path, F_OK) == 0)
1159 return xstrdup(path);
1160 path[strlen(path)-4] = '\0';
1161 if ((!exe_only || isexe) && access(path, F_OK) == 0)
1162 if (!(GetFileAttributes(path) & FILE_ATTRIBUTE_DIRECTORY))
1163 return xstrdup(path);
1164 return NULL;
1165 }
1166
1167 /*
1168 * Determines the absolute path of cmd using the split path in path.
1169 * If cmd contains a slash or backslash, no lookup is performed.
1170 */
1171 static char *path_lookup(const char *cmd, int exe_only)
1172 {
1173 const char *path;
1174 char *prog = NULL;
1175 int len = strlen(cmd);
1176 int isexe = len >= 4 && !strcasecmp(cmd+len-4, ".exe");
1177
1178 if (strchr(cmd, '/') || strchr(cmd, '\\'))
1179 return xstrdup(cmd);
1180
1181 path = mingw_getenv("PATH");
1182 if (!path)
1183 return NULL;
1184
1185 while (!prog) {
1186 const char *sep = strchrnul(path, ';');
1187 int dirlen = sep - path;
1188 if (dirlen)
1189 prog = lookup_prog(path, dirlen, cmd, isexe, exe_only);
1190 if (!*sep)
1191 break;
1192 path = sep + 1;
1193 }
1194
1195 return prog;
1196 }
1197
1198 static const wchar_t *wcschrnul(const wchar_t *s, wchar_t c)
1199 {
1200 while (*s && *s != c)
1201 s++;
1202 return s;
1203 }
1204
1205 /* Compare only keys */
1206 static int wenvcmp(const void *a, const void *b)
1207 {
1208 wchar_t *p = *(wchar_t **)a, *q = *(wchar_t **)b;
1209 size_t p_len, q_len;
1210
1211 /* Find the keys */
1212 p_len = wcschrnul(p, L'=') - p;
1213 q_len = wcschrnul(q, L'=') - q;
1214
1215 /* If the length differs, include the shorter key's NUL */
1216 if (p_len < q_len)
1217 p_len++;
1218 else if (p_len > q_len)
1219 p_len = q_len + 1;
1220
1221 return _wcsnicmp(p, q, p_len);
1222 }
1223
1224 /* We need a stable sort to convert the environment between UTF-16 <-> UTF-8 */
1225 #ifndef INTERNAL_QSORT
1226 #include "qsort.c"
1227 #endif
1228
1229 /*
1230 * Build an environment block combining the inherited environment
1231 * merged with the given list of settings.
1232 *
1233 * Values of the form "KEY=VALUE" in deltaenv override inherited values.
1234 * Values of the form "KEY" in deltaenv delete inherited values.
1235 *
1236 * Multiple entries in deltaenv for the same key are explicitly allowed.
1237 *
1238 * We return a contiguous block of UNICODE strings with a final trailing
1239 * zero word.
1240 */
1241 static wchar_t *make_environment_block(char **deltaenv)
1242 {
1243 wchar_t *wenv = GetEnvironmentStringsW(), *wdeltaenv, *result, *p;
1244 size_t wlen, s, delta_size, size;
1245
1246 wchar_t **array = NULL;
1247 size_t alloc = 0, nr = 0, i;
1248
1249 size = 1; /* for extra NUL at the end */
1250
1251 /* If there is no deltaenv to apply, simply return a copy. */
1252 if (!deltaenv || !*deltaenv) {
1253 for (p = wenv; p && *p; ) {
1254 size_t s = wcslen(p) + 1;
1255 size += s;
1256 p += s;
1257 }
1258
1259 ALLOC_ARRAY(result, size);
1260 memcpy(result, wenv, size * sizeof(*wenv));
1261 FreeEnvironmentStringsW(wenv);
1262 return result;
1263 }
1264
1265 /*
1266 * If there is a deltaenv, let's accumulate all keys into `array`,
1267 * sort them using the stable git_qsort() and then copy, skipping
1268 * duplicate keys
1269 */
1270 for (p = wenv; p && *p; ) {
1271 ALLOC_GROW(array, nr + 1, alloc);
1272 s = wcslen(p) + 1;
1273 array[nr++] = p;
1274 p += s;
1275 size += s;
1276 }
1277
1278 /* (over-)assess size needed for wchar version of deltaenv */
1279 for (delta_size = 0, i = 0; deltaenv[i]; i++)
1280 delta_size += strlen(deltaenv[i]) * 2 + 1;
1281 ALLOC_ARRAY(wdeltaenv, delta_size);
1282
1283 /* convert the deltaenv, appending to array */
1284 for (i = 0, p = wdeltaenv; deltaenv[i]; i++) {
1285 ALLOC_GROW(array, nr + 1, alloc);
1286 wlen = xutftowcs(p, deltaenv[i], wdeltaenv + delta_size - p);
1287 array[nr++] = p;
1288 p += wlen + 1;
1289 }
1290
1291 git_qsort(array, nr, sizeof(*array), wenvcmp);
1292 ALLOC_ARRAY(result, size + delta_size);
1293
1294 for (p = result, i = 0; i < nr; i++) {
1295 /* Skip any duplicate keys; last one wins */
1296 while (i + 1 < nr && !wenvcmp(array + i, array + i + 1))
1297 i++;
1298
1299 /* Skip "to delete" entry */
1300 if (!wcschr(array[i], L'='))
1301 continue;
1302
1303 size = wcslen(array[i]) + 1;
1304 memcpy(p, array[i], size * sizeof(*p));
1305 p += size;
1306 }
1307 *p = L'\0';
1308
1309 free(array);
1310 free(wdeltaenv);
1311 FreeEnvironmentStringsW(wenv);
1312 return result;
1313 }
1314
1315 static void do_unset_environment_variables(void)
1316 {
1317 static int done;
1318 char *p = unset_environment_variables;
1319
1320 if (done || !p)
1321 return;
1322 done = 1;
1323
1324 for (;;) {
1325 char *comma = strchr(p, ',');
1326
1327 if (comma)
1328 *comma = '\0';
1329 unsetenv(p);
1330 if (!comma)
1331 break;
1332 p = comma + 1;
1333 }
1334 }
1335
1336 struct pinfo_t {
1337 struct pinfo_t *next;
1338 pid_t pid;
1339 HANDLE proc;
1340 };
1341 static struct pinfo_t *pinfo = NULL;
1342 CRITICAL_SECTION pinfo_cs;
1343
1344 static pid_t mingw_spawnve_fd(const char *cmd, const char **argv, char **deltaenv,
1345 const char *dir,
1346 int prepend_cmd, int fhin, int fhout, int fherr)
1347 {
1348 STARTUPINFOW si;
1349 PROCESS_INFORMATION pi;
1350 struct strbuf args;
1351 wchar_t wcmd[MAX_PATH], wdir[MAX_PATH], *wargs, *wenvblk = NULL;
1352 unsigned flags = CREATE_UNICODE_ENVIRONMENT;
1353 BOOL ret;
1354 HANDLE cons;
1355
1356 do_unset_environment_variables();
1357
1358 /* Determine whether or not we are associated to a console */
1359 cons = CreateFile("CONOUT$", GENERIC_WRITE,
1360 FILE_SHARE_WRITE, NULL, OPEN_EXISTING,
1361 FILE_ATTRIBUTE_NORMAL, NULL);
1362 if (cons == INVALID_HANDLE_VALUE) {
1363 /* There is no console associated with this process.
1364 * Since the child is a console process, Windows
1365 * would normally create a console window. But
1366 * since we'll be redirecting std streams, we do
1367 * not need the console.
1368 * It is necessary to use DETACHED_PROCESS
1369 * instead of CREATE_NO_WINDOW to make ssh
1370 * recognize that it has no console.
1371 */
1372 flags |= DETACHED_PROCESS;
1373 } else {
1374 /* There is already a console. If we specified
1375 * DETACHED_PROCESS here, too, Windows would
1376 * disassociate the child from the console.
1377 * The same is true for CREATE_NO_WINDOW.
1378 * Go figure!
1379 */
1380 CloseHandle(cons);
1381 }
1382 memset(&si, 0, sizeof(si));
1383 si.cb = sizeof(si);
1384 si.dwFlags = STARTF_USESTDHANDLES;
1385 si.hStdInput = winansi_get_osfhandle(fhin);
1386 si.hStdOutput = winansi_get_osfhandle(fhout);
1387 si.hStdError = winansi_get_osfhandle(fherr);
1388
1389 if (xutftowcs_path(wcmd, cmd) < 0)
1390 return -1;
1391 if (dir && xutftowcs_path(wdir, dir) < 0)
1392 return -1;
1393
1394 /* concatenate argv, quoting args as we go */
1395 strbuf_init(&args, 0);
1396 if (prepend_cmd) {
1397 char *quoted = (char *)quote_arg(cmd);
1398 strbuf_addstr(&args, quoted);
1399 if (quoted != cmd)
1400 free(quoted);
1401 }
1402 for (; *argv; argv++) {
1403 char *quoted = (char *)quote_arg(*argv);
1404 if (*args.buf)
1405 strbuf_addch(&args, ' ');
1406 strbuf_addstr(&args, quoted);
1407 if (quoted != *argv)
1408 free(quoted);
1409 }
1410
1411 ALLOC_ARRAY(wargs, st_add(st_mult(2, args.len), 1));
1412 xutftowcs(wargs, args.buf, 2 * args.len + 1);
1413 strbuf_release(&args);
1414
1415 wenvblk = make_environment_block(deltaenv);
1416
1417 memset(&pi, 0, sizeof(pi));
1418 ret = CreateProcessW(wcmd, wargs, NULL, NULL, TRUE, flags,
1419 wenvblk, dir ? wdir : NULL, &si, &pi);
1420
1421 free(wenvblk);
1422 free(wargs);
1423
1424 if (!ret) {
1425 errno = ENOENT;
1426 return -1;
1427 }
1428 CloseHandle(pi.hThread);
1429
1430 /*
1431 * The process ID is the human-readable identifier of the process
1432 * that we want to present in log and error messages. The handle
1433 * is not useful for this purpose. But we cannot close it, either,
1434 * because it is not possible to turn a process ID into a process
1435 * handle after the process terminated.
1436 * Keep the handle in a list for waitpid.
1437 */
1438 EnterCriticalSection(&pinfo_cs);
1439 {
1440 struct pinfo_t *info = xmalloc(sizeof(struct pinfo_t));
1441 info->pid = pi.dwProcessId;
1442 info->proc = pi.hProcess;
1443 info->next = pinfo;
1444 pinfo = info;
1445 }
1446 LeaveCriticalSection(&pinfo_cs);
1447
1448 return (pid_t)pi.dwProcessId;
1449 }
1450
1451 static pid_t mingw_spawnv(const char *cmd, const char **argv, int prepend_cmd)
1452 {
1453 return mingw_spawnve_fd(cmd, argv, NULL, NULL, prepend_cmd, 0, 1, 2);
1454 }
1455
1456 pid_t mingw_spawnvpe(const char *cmd, const char **argv, char **deltaenv,
1457 const char *dir,
1458 int fhin, int fhout, int fherr)
1459 {
1460 pid_t pid;
1461 char *prog = path_lookup(cmd, 0);
1462
1463 if (!prog) {
1464 errno = ENOENT;
1465 pid = -1;
1466 }
1467 else {
1468 const char *interpr = parse_interpreter(prog);
1469
1470 if (interpr) {
1471 const char *argv0 = argv[0];
1472 char *iprog = path_lookup(interpr, 1);
1473 argv[0] = prog;
1474 if (!iprog) {
1475 errno = ENOENT;
1476 pid = -1;
1477 }
1478 else {
1479 pid = mingw_spawnve_fd(iprog, argv, deltaenv, dir, 1,
1480 fhin, fhout, fherr);
1481 free(iprog);
1482 }
1483 argv[0] = argv0;
1484 }
1485 else
1486 pid = mingw_spawnve_fd(prog, argv, deltaenv, dir, 0,
1487 fhin, fhout, fherr);
1488 free(prog);
1489 }
1490 return pid;
1491 }
1492
1493 static int try_shell_exec(const char *cmd, char *const *argv)
1494 {
1495 const char *interpr = parse_interpreter(cmd);
1496 char *prog;
1497 int pid = 0;
1498
1499 if (!interpr)
1500 return 0;
1501 prog = path_lookup(interpr, 1);
1502 if (prog) {
1503 int argc = 0;
1504 const char **argv2;
1505 while (argv[argc]) argc++;
1506 ALLOC_ARRAY(argv2, argc + 1);
1507 argv2[0] = (char *)cmd; /* full path to the script file */
1508 memcpy(&argv2[1], &argv[1], sizeof(*argv) * argc);
1509 pid = mingw_spawnv(prog, argv2, 1);
1510 if (pid >= 0) {
1511 int status;
1512 if (waitpid(pid, &status, 0) < 0)
1513 status = 255;
1514 exit(status);
1515 }
1516 pid = 1; /* indicate that we tried but failed */
1517 free(prog);
1518 free(argv2);
1519 }
1520 return pid;
1521 }
1522
1523 int mingw_execv(const char *cmd, char *const *argv)
1524 {
1525 /* check if git_command is a shell script */
1526 if (!try_shell_exec(cmd, argv)) {
1527 int pid, status;
1528
1529 pid = mingw_spawnv(cmd, (const char **)argv, 0);
1530 if (pid < 0)
1531 return -1;
1532 if (waitpid(pid, &status, 0) < 0)
1533 status = 255;
1534 exit(status);
1535 }
1536 return -1;
1537 }
1538
1539 int mingw_execvp(const char *cmd, char *const *argv)
1540 {
1541 char *prog = path_lookup(cmd, 0);
1542
1543 if (prog) {
1544 mingw_execv(prog, argv);
1545 free(prog);
1546 } else
1547 errno = ENOENT;
1548
1549 return -1;
1550 }
1551
1552 int mingw_kill(pid_t pid, int sig)
1553 {
1554 if (pid > 0 && sig == SIGTERM) {
1555 HANDLE h = OpenProcess(PROCESS_TERMINATE, FALSE, pid);
1556
1557 if (TerminateProcess(h, -1)) {
1558 CloseHandle(h);
1559 return 0;
1560 }
1561
1562 errno = err_win_to_posix(GetLastError());
1563 CloseHandle(h);
1564 return -1;
1565 } else if (pid > 0 && sig == 0) {
1566 HANDLE h = OpenProcess(PROCESS_QUERY_INFORMATION, FALSE, pid);
1567 if (h) {
1568 CloseHandle(h);
1569 return 0;
1570 }
1571 }
1572
1573 errno = EINVAL;
1574 return -1;
1575 }
1576
1577 /*
1578 * UTF-8 versions of getenv(), putenv() and unsetenv().
1579 * Internally, they use the CRT's stock UNICODE routines
1580 * to avoid data loss.
1581 */
1582 char *mingw_getenv(const char *name)
1583 {
1584 #define GETENV_MAX_RETAIN 30
1585 static char *values[GETENV_MAX_RETAIN];
1586 static int value_counter;
1587 int len_key, len_value;
1588 wchar_t *w_key;
1589 char *value;
1590 wchar_t w_value[32768];
1591
1592 if (!name || !*name)
1593 return NULL;
1594
1595 len_key = strlen(name) + 1;
1596 /* We cannot use xcalloc() here because that uses getenv() itself */
1597 w_key = calloc(len_key, sizeof(wchar_t));
1598 if (!w_key)
1599 die("Out of memory, (tried to allocate %u wchar_t's)", len_key);
1600 xutftowcs(w_key, name, len_key);
1601 len_value = GetEnvironmentVariableW(w_key, w_value, ARRAY_SIZE(w_value));
1602 if (!len_value && GetLastError() == ERROR_ENVVAR_NOT_FOUND) {
1603 free(w_key);
1604 return NULL;
1605 }
1606 free(w_key);
1607
1608 len_value = len_value * 3 + 1;
1609 /* We cannot use xcalloc() here because that uses getenv() itself */
1610 value = calloc(len_value, sizeof(char));
1611 if (!value)
1612 die("Out of memory, (tried to allocate %u bytes)", len_value);
1613 xwcstoutf(value, w_value, len_value);
1614
1615 /*
1616 * We return `value` which is an allocated value and the caller is NOT
1617 * expecting to have to free it, so we keep a round-robin array,
1618 * invalidating the buffer after GETENV_MAX_RETAIN getenv() calls.
1619 */
1620 free(values[value_counter]);
1621 values[value_counter++] = value;
1622 if (value_counter >= ARRAY_SIZE(values))
1623 value_counter = 0;
1624
1625 return value;
1626 }
1627
1628 int mingw_putenv(const char *namevalue)
1629 {
1630 int size;
1631 wchar_t *wide, *equal;
1632 BOOL result;
1633
1634 if (!namevalue || !*namevalue)
1635 return 0;
1636
1637 size = strlen(namevalue) * 2 + 1;
1638 wide = calloc(size, sizeof(wchar_t));
1639 if (!wide)
1640 die("Out of memory, (tried to allocate %u wchar_t's)", size);
1641 xutftowcs(wide, namevalue, size);
1642 equal = wcschr(wide, L'=');
1643 if (!equal)
1644 result = SetEnvironmentVariableW(wide, NULL);
1645 else {
1646 *equal = L'\0';
1647 result = SetEnvironmentVariableW(wide, equal + 1);
1648 }
1649 free(wide);
1650
1651 if (!result)
1652 errno = err_win_to_posix(GetLastError());
1653
1654 return result ? 0 : -1;
1655 }
1656
1657 /*
1658 * Note, this isn't a complete replacement for getaddrinfo. It assumes
1659 * that service contains a numerical port, or that it is null. It
1660 * does a simple search using gethostbyname, and returns one IPv4 host
1661 * if one was found.
1662 */
1663 static int WSAAPI getaddrinfo_stub(const char *node, const char *service,
1664 const struct addrinfo *hints,
1665 struct addrinfo **res)
1666 {
1667 struct hostent *h = NULL;
1668 struct addrinfo *ai;
1669 struct sockaddr_in *sin;
1670
1671 if (node) {
1672 h = gethostbyname(node);
1673 if (!h)
1674 return WSAGetLastError();
1675 }
1676
1677 ai = xmalloc(sizeof(struct addrinfo));
1678 *res = ai;
1679 ai->ai_flags = 0;
1680 ai->ai_family = AF_INET;
1681 ai->ai_socktype = hints ? hints->ai_socktype : 0;
1682 switch (ai->ai_socktype) {
1683 case SOCK_STREAM:
1684 ai->ai_protocol = IPPROTO_TCP;
1685 break;
1686 case SOCK_DGRAM:
1687 ai->ai_protocol = IPPROTO_UDP;
1688 break;
1689 default:
1690 ai->ai_protocol = 0;
1691 break;
1692 }
1693 ai->ai_addrlen = sizeof(struct sockaddr_in);
1694 if (hints && (hints->ai_flags & AI_CANONNAME))
1695 ai->ai_canonname = h ? xstrdup(h->h_name) : NULL;
1696 else
1697 ai->ai_canonname = NULL;
1698
1699 sin = xcalloc(1, ai->ai_addrlen);
1700 sin->sin_family = AF_INET;
1701 /* Note: getaddrinfo is supposed to allow service to be a string,
1702 * which should be looked up using getservbyname. This is
1703 * currently not implemented */
1704 if (service)
1705 sin->sin_port = htons(atoi(service));
1706 if (h)
1707 sin->sin_addr = *(struct in_addr *)h->h_addr;
1708 else if (hints && (hints->ai_flags & AI_PASSIVE))
1709 sin->sin_addr.s_addr = INADDR_ANY;
1710 else
1711 sin->sin_addr.s_addr = INADDR_LOOPBACK;
1712 ai->ai_addr = (struct sockaddr *)sin;
1713 ai->ai_next = NULL;
1714 return 0;
1715 }
1716
1717 static void WSAAPI freeaddrinfo_stub(struct addrinfo *res)
1718 {
1719 free(res->ai_canonname);
1720 free(res->ai_addr);
1721 free(res);
1722 }
1723
1724 static int WSAAPI getnameinfo_stub(const struct sockaddr *sa, socklen_t salen,
1725 char *host, DWORD hostlen,
1726 char *serv, DWORD servlen, int flags)
1727 {
1728 const struct sockaddr_in *sin = (const struct sockaddr_in *)sa;
1729 if (sa->sa_family != AF_INET)
1730 return EAI_FAMILY;
1731 if (!host && !serv)
1732 return EAI_NONAME;
1733
1734 if (host && hostlen > 0) {
1735 struct hostent *ent = NULL;
1736 if (!(flags & NI_NUMERICHOST))
1737 ent = gethostbyaddr((const char *)&sin->sin_addr,
1738 sizeof(sin->sin_addr), AF_INET);
1739
1740 if (ent)
1741 snprintf(host, hostlen, "%s", ent->h_name);
1742 else if (flags & NI_NAMEREQD)
1743 return EAI_NONAME;
1744 else
1745 snprintf(host, hostlen, "%s", inet_ntoa(sin->sin_addr));
1746 }
1747
1748 if (serv && servlen > 0) {
1749 struct servent *ent = NULL;
1750 if (!(flags & NI_NUMERICSERV))
1751 ent = getservbyport(sin->sin_port,
1752 flags & NI_DGRAM ? "udp" : "tcp");
1753
1754 if (ent)
1755 snprintf(serv, servlen, "%s", ent->s_name);
1756 else
1757 snprintf(serv, servlen, "%d", ntohs(sin->sin_port));
1758 }
1759
1760 return 0;
1761 }
1762
1763 static HMODULE ipv6_dll = NULL;
1764 static void (WSAAPI *ipv6_freeaddrinfo)(struct addrinfo *res);
1765 static int (WSAAPI *ipv6_getaddrinfo)(const char *node, const char *service,
1766 const struct addrinfo *hints,
1767 struct addrinfo **res);
1768 static int (WSAAPI *ipv6_getnameinfo)(const struct sockaddr *sa, socklen_t salen,
1769 char *host, DWORD hostlen,
1770 char *serv, DWORD servlen, int flags);
1771 /*
1772 * gai_strerror is an inline function in the ws2tcpip.h header, so we
1773 * don't need to try to load that one dynamically.
1774 */
1775
1776 static void socket_cleanup(void)
1777 {
1778 WSACleanup();
1779 if (ipv6_dll)
1780 FreeLibrary(ipv6_dll);
1781 ipv6_dll = NULL;
1782 ipv6_freeaddrinfo = freeaddrinfo_stub;
1783 ipv6_getaddrinfo = getaddrinfo_stub;
1784 ipv6_getnameinfo = getnameinfo_stub;
1785 }
1786
1787 static void ensure_socket_initialization(void)
1788 {
1789 WSADATA wsa;
1790 static int initialized = 0;
1791 const char *libraries[] = { "ws2_32.dll", "wship6.dll", NULL };
1792 const char **name;
1793
1794 if (initialized)
1795 return;
1796
1797 if (WSAStartup(MAKEWORD(2,2), &wsa))
1798 die("unable to initialize winsock subsystem, error %d",
1799 WSAGetLastError());
1800
1801 for (name = libraries; *name; name++) {
1802 ipv6_dll = LoadLibraryExA(*name, NULL,
1803 LOAD_LIBRARY_SEARCH_SYSTEM32);
1804 if (!ipv6_dll)
1805 continue;
1806
1807 ipv6_freeaddrinfo = (void (WSAAPI *)(struct addrinfo *))
1808 GetProcAddress(ipv6_dll, "freeaddrinfo");
1809 ipv6_getaddrinfo = (int (WSAAPI *)(const char *, const char *,
1810 const struct addrinfo *,
1811 struct addrinfo **))
1812 GetProcAddress(ipv6_dll, "getaddrinfo");
1813 ipv6_getnameinfo = (int (WSAAPI *)(const struct sockaddr *,
1814 socklen_t, char *, DWORD,
1815 char *, DWORD, int))
1816 GetProcAddress(ipv6_dll, "getnameinfo");
1817 if (!ipv6_freeaddrinfo || !ipv6_getaddrinfo || !ipv6_getnameinfo) {
1818 FreeLibrary(ipv6_dll);
1819 ipv6_dll = NULL;
1820 } else
1821 break;
1822 }
1823 if (!ipv6_freeaddrinfo || !ipv6_getaddrinfo || !ipv6_getnameinfo) {
1824 ipv6_freeaddrinfo = freeaddrinfo_stub;
1825 ipv6_getaddrinfo = getaddrinfo_stub;
1826 ipv6_getnameinfo = getnameinfo_stub;
1827 }
1828
1829 atexit(socket_cleanup);
1830 initialized = 1;
1831 }
1832
1833 #undef gethostname
1834 int mingw_gethostname(char *name, int namelen)
1835 {
1836 ensure_socket_initialization();
1837 return gethostname(name, namelen);
1838 }
1839
1840 #undef gethostbyname
1841 struct hostent *mingw_gethostbyname(const char *host)
1842 {
1843 ensure_socket_initialization();
1844 return gethostbyname(host);
1845 }
1846
1847 void mingw_freeaddrinfo(struct addrinfo *res)
1848 {
1849 ipv6_freeaddrinfo(res);
1850 }
1851
1852 int mingw_getaddrinfo(const char *node, const char *service,
1853 const struct addrinfo *hints, struct addrinfo **res)
1854 {
1855 ensure_socket_initialization();
1856 return ipv6_getaddrinfo(node, service, hints, res);
1857 }
1858
1859 int mingw_getnameinfo(const struct sockaddr *sa, socklen_t salen,
1860 char *host, DWORD hostlen, char *serv, DWORD servlen,
1861 int flags)
1862 {
1863 ensure_socket_initialization();
1864 return ipv6_getnameinfo(sa, salen, host, hostlen, serv, servlen, flags);
1865 }
1866
1867 int mingw_socket(int domain, int type, int protocol)
1868 {
1869 int sockfd;
1870 SOCKET s;
1871
1872 ensure_socket_initialization();
1873 s = WSASocket(domain, type, protocol, NULL, 0, 0);
1874 if (s == INVALID_SOCKET) {
1875 /*
1876 * WSAGetLastError() values are regular BSD error codes
1877 * biased by WSABASEERR.
1878 * However, strerror() does not know about networking
1879 * specific errors, which are values beginning at 38 or so.
1880 * Therefore, we choose to leave the biased error code
1881 * in errno so that _if_ someone looks up the code somewhere,
1882 * then it is at least the number that are usually listed.
1883 */
1884 errno = WSAGetLastError();
1885 return -1;
1886 }
1887 /* convert into a file descriptor */
1888 if ((sockfd = _open_osfhandle(s, O_RDWR|O_BINARY)) < 0) {
1889 closesocket(s);
1890 return error("unable to make a socket file descriptor: %s",
1891 strerror(errno));
1892 }
1893 return sockfd;
1894 }
1895
1896 #undef connect
1897 int mingw_connect(int sockfd, struct sockaddr *sa, size_t sz)
1898 {
1899 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
1900 return connect(s, sa, sz);
1901 }
1902
1903 #undef bind
1904 int mingw_bind(int sockfd, struct sockaddr *sa, size_t sz)
1905 {
1906 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
1907 return bind(s, sa, sz);
1908 }
1909
1910 #undef setsockopt
1911 int mingw_setsockopt(int sockfd, int lvl, int optname, void *optval, int optlen)
1912 {
1913 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
1914 return setsockopt(s, lvl, optname, (const char*)optval, optlen);
1915 }
1916
1917 #undef shutdown
1918 int mingw_shutdown(int sockfd, int how)
1919 {
1920 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
1921 return shutdown(s, how);
1922 }
1923
1924 #undef listen
1925 int mingw_listen(int sockfd, int backlog)
1926 {
1927 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
1928 return listen(s, backlog);
1929 }
1930
1931 #undef accept
1932 int mingw_accept(int sockfd1, struct sockaddr *sa, socklen_t *sz)
1933 {
1934 int sockfd2;
1935
1936 SOCKET s1 = (SOCKET)_get_osfhandle(sockfd1);
1937 SOCKET s2 = accept(s1, sa, sz);
1938
1939 /* convert into a file descriptor */
1940 if ((sockfd2 = _open_osfhandle(s2, O_RDWR|O_BINARY)) < 0) {
1941 int err = errno;
1942 closesocket(s2);
1943 return error("unable to make a socket file descriptor: %s",
1944 strerror(err));
1945 }
1946 return sockfd2;
1947 }
1948
1949 #undef rename
1950 int mingw_rename(const char *pold, const char *pnew)
1951 {
1952 DWORD attrs, gle;
1953 int tries = 0;
1954 wchar_t wpold[MAX_PATH], wpnew[MAX_PATH];
1955 if (xutftowcs_path(wpold, pold) < 0 || xutftowcs_path(wpnew, pnew) < 0)
1956 return -1;
1957
1958 /*
1959 * Try native rename() first to get errno right.
1960 * It is based on MoveFile(), which cannot overwrite existing files.
1961 */
1962 if (!_wrename(wpold, wpnew))
1963 return 0;
1964 if (errno != EEXIST)
1965 return -1;
1966 repeat:
1967 if (MoveFileExW(wpold, wpnew, MOVEFILE_REPLACE_EXISTING))
1968 return 0;
1969 /* TODO: translate more errors */
1970 gle = GetLastError();
1971 if (gle == ERROR_ACCESS_DENIED &&
1972 (attrs = GetFileAttributesW(wpnew)) != INVALID_FILE_ATTRIBUTES) {
1973 if (attrs & FILE_ATTRIBUTE_DIRECTORY) {
1974 DWORD attrsold = GetFileAttributesW(wpold);
1975 if (attrsold == INVALID_FILE_ATTRIBUTES ||
1976 !(attrsold & FILE_ATTRIBUTE_DIRECTORY))
1977 errno = EISDIR;
1978 else if (!_wrmdir(wpnew))
1979 goto repeat;
1980 return -1;
1981 }
1982 if ((attrs & FILE_ATTRIBUTE_READONLY) &&
1983 SetFileAttributesW(wpnew, attrs & ~FILE_ATTRIBUTE_READONLY)) {
1984 if (MoveFileExW(wpold, wpnew, MOVEFILE_REPLACE_EXISTING))
1985 return 0;
1986 gle = GetLastError();
1987 /* revert file attributes on failure */
1988 SetFileAttributesW(wpnew, attrs);
1989 }
1990 }
1991 if (tries < ARRAY_SIZE(delay) && gle == ERROR_ACCESS_DENIED) {
1992 /*
1993 * We assume that some other process had the source or
1994 * destination file open at the wrong moment and retry.
1995 * In order to give the other process a higher chance to
1996 * complete its operation, we give up our time slice now.
1997 * If we have to retry again, we do sleep a bit.
1998 */
1999 Sleep(delay[tries]);
2000 tries++;
2001 goto repeat;
2002 }
2003 if (gle == ERROR_ACCESS_DENIED &&
2004 ask_yes_no_if_possible("Rename from '%s' to '%s' failed. "
2005 "Should I try again?", pold, pnew))
2006 goto repeat;
2007
2008 errno = EACCES;
2009 return -1;
2010 }
2011
2012 /*
2013 * Note that this doesn't return the actual pagesize, but
2014 * the allocation granularity. If future Windows specific git code
2015 * needs the real getpagesize function, we need to find another solution.
2016 */
2017 int mingw_getpagesize(void)
2018 {
2019 SYSTEM_INFO si;
2020 GetSystemInfo(&si);
2021 return si.dwAllocationGranularity;
2022 }
2023
2024 /* See https://msdn.microsoft.com/en-us/library/windows/desktop/ms724435.aspx */
2025 enum EXTENDED_NAME_FORMAT {
2026 NameDisplay = 3,
2027 NameUserPrincipal = 8
2028 };
2029
2030 static char *get_extended_user_info(enum EXTENDED_NAME_FORMAT type)
2031 {
2032 DECLARE_PROC_ADDR(secur32.dll, BOOL, GetUserNameExW,
2033 enum EXTENDED_NAME_FORMAT, LPCWSTR, PULONG);
2034 static wchar_t wbuffer[1024];
2035 DWORD len;
2036
2037 if (!INIT_PROC_ADDR(GetUserNameExW))
2038 return NULL;
2039
2040 len = ARRAY_SIZE(wbuffer);
2041 if (GetUserNameExW(type, wbuffer, &len)) {
2042 char *converted = xmalloc((len *= 3));
2043 if (xwcstoutf(converted, wbuffer, len) >= 0)
2044 return converted;
2045 free(converted);
2046 }
2047
2048 return NULL;
2049 }
2050
2051 char *mingw_query_user_email(void)
2052 {
2053 return get_extended_user_info(NameUserPrincipal);
2054 }
2055
2056 struct passwd *getpwuid(int uid)
2057 {
2058 static unsigned initialized;
2059 static char user_name[100];
2060 static struct passwd *p;
2061 DWORD len;
2062
2063 if (initialized)
2064 return p;
2065
2066 len = sizeof(user_name);
2067 if (!GetUserName(user_name, &len)) {
2068 initialized = 1;
2069 return NULL;
2070 }
2071
2072 p = xmalloc(sizeof(*p));
2073 p->pw_name = user_name;
2074 p->pw_gecos = get_extended_user_info(NameDisplay);
2075 if (!p->pw_gecos)
2076 p->pw_gecos = "unknown";
2077 p->pw_dir = NULL;
2078
2079 initialized = 1;
2080 return p;
2081 }
2082
2083 static HANDLE timer_event;
2084 static HANDLE timer_thread;
2085 static int timer_interval;
2086 static int one_shot;
2087 static sig_handler_t timer_fn = SIG_DFL, sigint_fn = SIG_DFL;
2088
2089 /* The timer works like this:
2090 * The thread, ticktack(), is a trivial routine that most of the time
2091 * only waits to receive the signal to terminate. The main thread tells
2092 * the thread to terminate by setting the timer_event to the signalled
2093 * state.
2094 * But ticktack() interrupts the wait state after the timer's interval
2095 * length to call the signal handler.
2096 */
2097
2098 static unsigned __stdcall ticktack(void *dummy)
2099 {
2100 while (WaitForSingleObject(timer_event, timer_interval) == WAIT_TIMEOUT) {
2101 mingw_raise(SIGALRM);
2102 if (one_shot)
2103 break;
2104 }
2105 return 0;
2106 }
2107
2108 static int start_timer_thread(void)
2109 {
2110 timer_event = CreateEvent(NULL, FALSE, FALSE, NULL);
2111 if (timer_event) {
2112 timer_thread = (HANDLE) _beginthreadex(NULL, 0, ticktack, NULL, 0, NULL);
2113 if (!timer_thread )
2114 return errno = ENOMEM,
2115 error("cannot start timer thread");
2116 } else
2117 return errno = ENOMEM,
2118 error("cannot allocate resources for timer");
2119 return 0;
2120 }
2121
2122 static void stop_timer_thread(void)
2123 {
2124 if (timer_event)
2125 SetEvent(timer_event); /* tell thread to terminate */
2126 if (timer_thread) {
2127 int rc = WaitForSingleObject(timer_thread, 1000);
2128 if (rc == WAIT_TIMEOUT)
2129 error("timer thread did not terminate timely");
2130 else if (rc != WAIT_OBJECT_0)
2131 error("waiting for timer thread failed: %lu",
2132 GetLastError());
2133 CloseHandle(timer_thread);
2134 }
2135 if (timer_event)
2136 CloseHandle(timer_event);
2137 timer_event = NULL;
2138 timer_thread = NULL;
2139 }
2140
2141 static inline int is_timeval_eq(const struct timeval *i1, const struct timeval *i2)
2142 {
2143 return i1->tv_sec == i2->tv_sec && i1->tv_usec == i2->tv_usec;
2144 }
2145
2146 int setitimer(int type, struct itimerval *in, struct itimerval *out)
2147 {
2148 static const struct timeval zero;
2149 static int atexit_done;
2150
2151 if (out != NULL)
2152 return errno = EINVAL,
2153 error("setitimer param 3 != NULL not implemented");
2154 if (!is_timeval_eq(&in->it_interval, &zero) &&
2155 !is_timeval_eq(&in->it_interval, &in->it_value))
2156 return errno = EINVAL,
2157 error("setitimer: it_interval must be zero or eq it_value");
2158
2159 if (timer_thread)
2160 stop_timer_thread();
2161
2162 if (is_timeval_eq(&in->it_value, &zero) &&
2163 is_timeval_eq(&in->it_interval, &zero))
2164 return 0;
2165
2166 timer_interval = in->it_value.tv_sec * 1000 + in->it_value.tv_usec / 1000;
2167 one_shot = is_timeval_eq(&in->it_interval, &zero);
2168 if (!atexit_done) {
2169 atexit(stop_timer_thread);
2170 atexit_done = 1;
2171 }
2172 return start_timer_thread();
2173 }
2174
2175 int sigaction(int sig, struct sigaction *in, struct sigaction *out)
2176 {
2177 if (sig != SIGALRM)
2178 return errno = EINVAL,
2179 error("sigaction only implemented for SIGALRM");
2180 if (out != NULL)
2181 return errno = EINVAL,
2182 error("sigaction: param 3 != NULL not implemented");
2183
2184 timer_fn = in->sa_handler;
2185 return 0;
2186 }
2187
2188 #undef signal
2189 sig_handler_t mingw_signal(int sig, sig_handler_t handler)
2190 {
2191 sig_handler_t old;
2192
2193 switch (sig) {
2194 case SIGALRM:
2195 old = timer_fn;
2196 timer_fn = handler;
2197 break;
2198
2199 case SIGINT:
2200 old = sigint_fn;
2201 sigint_fn = handler;
2202 break;
2203
2204 default:
2205 return signal(sig, handler);
2206 }
2207
2208 return old;
2209 }
2210
2211 #undef raise
2212 int mingw_raise(int sig)
2213 {
2214 switch (sig) {
2215 case SIGALRM:
2216 if (timer_fn == SIG_DFL) {
2217 if (isatty(STDERR_FILENO))
2218 fputs("Alarm clock\n", stderr);
2219 exit(128 + SIGALRM);
2220 } else if (timer_fn != SIG_IGN)
2221 timer_fn(SIGALRM);
2222 return 0;
2223
2224 case SIGINT:
2225 if (sigint_fn == SIG_DFL)
2226 exit(128 + SIGINT);
2227 else if (sigint_fn != SIG_IGN)
2228 sigint_fn(SIGINT);
2229 return 0;
2230
2231 default:
2232 return raise(sig);
2233 }
2234 }
2235
2236 int link(const char *oldpath, const char *newpath)
2237 {
2238 wchar_t woldpath[MAX_PATH], wnewpath[MAX_PATH];
2239 if (xutftowcs_path(woldpath, oldpath) < 0 ||
2240 xutftowcs_path(wnewpath, newpath) < 0)
2241 return -1;
2242
2243 if (!CreateHardLinkW(wnewpath, woldpath, NULL)) {
2244 errno = err_win_to_posix(GetLastError());
2245 return -1;
2246 }
2247 return 0;
2248 }
2249
2250 pid_t waitpid(pid_t pid, int *status, int options)
2251 {
2252 HANDLE h = OpenProcess(SYNCHRONIZE | PROCESS_QUERY_INFORMATION,
2253 FALSE, pid);
2254 if (!h) {
2255 errno = ECHILD;
2256 return -1;
2257 }
2258
2259 if (pid > 0 && options & WNOHANG) {
2260 if (WAIT_OBJECT_0 != WaitForSingleObject(h, 0)) {
2261 CloseHandle(h);
2262 return 0;
2263 }
2264 options &= ~WNOHANG;
2265 }
2266
2267 if (options == 0) {
2268 struct pinfo_t **ppinfo;
2269 if (WaitForSingleObject(h, INFINITE) != WAIT_OBJECT_0) {
2270 CloseHandle(h);
2271 return 0;
2272 }
2273
2274 if (status)
2275 GetExitCodeProcess(h, (LPDWORD)status);
2276
2277 EnterCriticalSection(&pinfo_cs);
2278
2279 ppinfo = &pinfo;
2280 while (*ppinfo) {
2281 struct pinfo_t *info = *ppinfo;
2282 if (info->pid == pid) {
2283 CloseHandle(info->proc);
2284 *ppinfo = info->next;
2285 free(info);
2286 break;
2287 }
2288 ppinfo = &info->next;
2289 }
2290
2291 LeaveCriticalSection(&pinfo_cs);
2292
2293 CloseHandle(h);
2294 return pid;
2295 }
2296 CloseHandle(h);
2297
2298 errno = EINVAL;
2299 return -1;
2300 }
2301
2302 int mingw_has_dos_drive_prefix(const char *path)
2303 {
2304 int i;
2305
2306 /*
2307 * Does it start with an ASCII letter (i.e. highest bit not set),
2308 * followed by a colon?
2309 */
2310 if (!(0x80 & (unsigned char)*path))
2311 return *path && path[1] == ':' ? 2 : 0;
2312
2313 /*
2314 * While drive letters must be letters of the English alphabet, it is
2315 * possible to assign virtually _any_ Unicode character via `subst` as
2316 * a drive letter to "virtual drives". Even `1`, or `ä`. Or fun stuff
2317 * like this:
2318 *
2319 * subst ֍: %USERPROFILE%\Desktop
2320 */
2321 for (i = 1; i < 4 && (0x80 & (unsigned char)path[i]); i++)
2322 ; /* skip first UTF-8 character */
2323 return path[i] == ':' ? i + 1 : 0;
2324 }
2325
2326 int mingw_skip_dos_drive_prefix(char **path)
2327 {
2328 int ret = has_dos_drive_prefix(*path);
2329 *path += ret;
2330 return ret;
2331 }
2332
2333 int mingw_offset_1st_component(const char *path)
2334 {
2335 char *pos = (char *)path;
2336
2337 /* unc paths */
2338 if (!skip_dos_drive_prefix(&pos) &&
2339 is_dir_sep(pos[0]) && is_dir_sep(pos[1])) {
2340 /* skip server name */
2341 pos = strpbrk(pos + 2, "\\/");
2342 if (!pos)
2343 return 0; /* Error: malformed unc path */
2344
2345 do {
2346 pos++;
2347 } while (*pos && !is_dir_sep(*pos));
2348 }
2349
2350 return pos + is_dir_sep(*pos) - path;
2351 }
2352
2353 int xutftowcsn(wchar_t *wcs, const char *utfs, size_t wcslen, int utflen)
2354 {
2355 int upos = 0, wpos = 0;
2356 const unsigned char *utf = (const unsigned char*) utfs;
2357 if (!utf || !wcs || wcslen < 1) {
2358 errno = EINVAL;
2359 return -1;
2360 }
2361 /* reserve space for \0 */
2362 wcslen--;
2363 if (utflen < 0)
2364 utflen = INT_MAX;
2365
2366 while (upos < utflen) {
2367 int c = utf[upos++] & 0xff;
2368 if (utflen == INT_MAX && c == 0)
2369 break;
2370
2371 if (wpos >= wcslen) {
2372 wcs[wpos] = 0;
2373 errno = ERANGE;
2374 return -1;
2375 }
2376
2377 if (c < 0x80) {
2378 /* ASCII */
2379 wcs[wpos++] = c;
2380 } else if (c >= 0xc2 && c < 0xe0 && upos < utflen &&
2381 (utf[upos] & 0xc0) == 0x80) {
2382 /* 2-byte utf-8 */
2383 c = ((c & 0x1f) << 6);
2384 c |= (utf[upos++] & 0x3f);
2385 wcs[wpos++] = c;
2386 } else if (c >= 0xe0 && c < 0xf0 && upos + 1 < utflen &&
2387 !(c == 0xe0 && utf[upos] < 0xa0) && /* over-long encoding */
2388 (utf[upos] & 0xc0) == 0x80 &&
2389 (utf[upos + 1] & 0xc0) == 0x80) {
2390 /* 3-byte utf-8 */
2391 c = ((c & 0x0f) << 12);
2392 c |= ((utf[upos++] & 0x3f) << 6);
2393 c |= (utf[upos++] & 0x3f);
2394 wcs[wpos++] = c;
2395 } else if (c >= 0xf0 && c < 0xf5 && upos + 2 < utflen &&
2396 wpos + 1 < wcslen &&
2397 !(c == 0xf0 && utf[upos] < 0x90) && /* over-long encoding */
2398 !(c == 0xf4 && utf[upos] >= 0x90) && /* > \u10ffff */
2399 (utf[upos] & 0xc0) == 0x80 &&
2400 (utf[upos + 1] & 0xc0) == 0x80 &&
2401 (utf[upos + 2] & 0xc0) == 0x80) {
2402 /* 4-byte utf-8: convert to \ud8xx \udcxx surrogate pair */
2403 c = ((c & 0x07) << 18);
2404 c |= ((utf[upos++] & 0x3f) << 12);
2405 c |= ((utf[upos++] & 0x3f) << 6);
2406 c |= (utf[upos++] & 0x3f);
2407 c -= 0x10000;
2408 wcs[wpos++] = 0xd800 | (c >> 10);
2409 wcs[wpos++] = 0xdc00 | (c & 0x3ff);
2410 } else if (c >= 0xa0) {
2411 /* invalid utf-8 byte, printable unicode char: convert 1:1 */
2412 wcs[wpos++] = c;
2413 } else {
2414 /* invalid utf-8 byte, non-printable unicode: convert to hex */
2415 static const char *hex = "0123456789abcdef";
2416 wcs[wpos++] = hex[c >> 4];
2417 if (wpos < wcslen)
2418 wcs[wpos++] = hex[c & 0x0f];
2419 }
2420 }
2421 wcs[wpos] = 0;
2422 return wpos;
2423 }
2424
2425 int xwcstoutf(char *utf, const wchar_t *wcs, size_t utflen)
2426 {
2427 if (!wcs || !utf || utflen < 1) {
2428 errno = EINVAL;
2429 return -1;
2430 }
2431 utflen = WideCharToMultiByte(CP_UTF8, 0, wcs, -1, utf, utflen, NULL, NULL);
2432 if (utflen)
2433 return utflen - 1;
2434 errno = ERANGE;
2435 return -1;
2436 }
2437
2438 static void setup_windows_environment(void)
2439 {
2440 char *tmp = getenv("TMPDIR");
2441
2442 /* on Windows it is TMP and TEMP */
2443 if (!tmp) {
2444 if (!(tmp = getenv("TMP")))
2445 tmp = getenv("TEMP");
2446 if (tmp) {
2447 setenv("TMPDIR", tmp, 1);
2448 tmp = getenv("TMPDIR");
2449 }
2450 }
2451
2452 if (tmp) {
2453 /*
2454 * Convert all dir separators to forward slashes,
2455 * to help shell commands called from the Git
2456 * executable (by not mistaking the dir separators
2457 * for escape characters).
2458 */
2459 convert_slashes(tmp);
2460 }
2461
2462 /* simulate TERM to enable auto-color (see color.c) */
2463 if (!getenv("TERM"))
2464 setenv("TERM", "cygwin", 1);
2465 }
2466
2467 int is_valid_win32_path(const char *path)
2468 {
2469 int preceding_space_or_period = 0, i = 0, periods = 0;
2470
2471 if (!protect_ntfs)
2472 return 1;
2473
2474 skip_dos_drive_prefix((char **)&path);
2475
2476 for (;;) {
2477 char c = *(path++);
2478 switch (c) {
2479 case '\0':
2480 case '/': case '\\':
2481 /* cannot end in ` ` or `.`, except for `.` and `..` */
2482 if (preceding_space_or_period &&
2483 (i != periods || periods > 2))
2484 return 0;
2485 if (!c)
2486 return 1;
2487
2488 i = periods = preceding_space_or_period = 0;
2489 continue;
2490 case '.':
2491 periods++;
2492 /* fallthru */
2493 case ' ':
2494 preceding_space_or_period = 1;
2495 i++;
2496 continue;
2497 case ':': /* DOS drive prefix was already skipped */
2498 case '<': case '>': case '"': case '|': case '?': case '*':
2499 /* illegal character */
2500 return 0;
2501 default:
2502 if (c > '\0' && c < '\x20')
2503 /* illegal character */
2504 return 0;
2505 }
2506 preceding_space_or_period = 0;
2507 i++;
2508 }
2509 }
2510
2511 /*
2512 * Disable MSVCRT command line wildcard expansion (__getmainargs called from
2513 * mingw startup code, see init.c in mingw runtime).
2514 */
2515 int _CRT_glob = 0;
2516
2517 typedef struct {
2518 int newmode;
2519 } _startupinfo;
2520
2521 extern int __wgetmainargs(int *argc, wchar_t ***argv, wchar_t ***env, int glob,
2522 _startupinfo *si);
2523
2524 static NORETURN void die_startup(void)
2525 {
2526 fputs("fatal: not enough memory for initialization", stderr);
2527 exit(128);
2528 }
2529
2530 static void *malloc_startup(size_t size)
2531 {
2532 void *result = malloc(size);
2533 if (!result)
2534 die_startup();
2535 return result;
2536 }
2537
2538 static char *wcstoutfdup_startup(char *buffer, const wchar_t *wcs, size_t len)
2539 {
2540 len = xwcstoutf(buffer, wcs, len) + 1;
2541 return memcpy(malloc_startup(len), buffer, len);
2542 }
2543
2544 static void maybe_redirect_std_handle(const wchar_t *key, DWORD std_id, int fd,
2545 DWORD desired_access, DWORD flags)
2546 {
2547 DWORD create_flag = fd ? OPEN_ALWAYS : OPEN_EXISTING;
2548 wchar_t buf[MAX_PATH];
2549 DWORD max = ARRAY_SIZE(buf);
2550 HANDLE handle;
2551 DWORD ret = GetEnvironmentVariableW(key, buf, max);
2552
2553 if (!ret || ret >= max)
2554 return;
2555
2556 /* make sure this does not leak into child processes */
2557 SetEnvironmentVariableW(key, NULL);
2558 if (!wcscmp(buf, L"off")) {
2559 close(fd);
2560 handle = GetStdHandle(std_id);
2561 if (handle != INVALID_HANDLE_VALUE)
2562 CloseHandle(handle);
2563 return;
2564 }
2565 if (std_id == STD_ERROR_HANDLE && !wcscmp(buf, L"2>&1")) {
2566 handle = GetStdHandle(STD_OUTPUT_HANDLE);
2567 if (handle == INVALID_HANDLE_VALUE) {
2568 close(fd);
2569 handle = GetStdHandle(std_id);
2570 if (handle != INVALID_HANDLE_VALUE)
2571 CloseHandle(handle);
2572 } else {
2573 int new_fd = _open_osfhandle((intptr_t)handle, O_BINARY);
2574 SetStdHandle(std_id, handle);
2575 dup2(new_fd, fd);
2576 /* do *not* close the new_fd: that would close stdout */
2577 }
2578 return;
2579 }
2580 handle = CreateFileW(buf, desired_access, 0, NULL, create_flag,
2581 flags, NULL);
2582 if (handle != INVALID_HANDLE_VALUE) {
2583 int new_fd = _open_osfhandle((intptr_t)handle, O_BINARY);
2584 SetStdHandle(std_id, handle);
2585 dup2(new_fd, fd);
2586 close(new_fd);
2587 }
2588 }
2589
2590 static void maybe_redirect_std_handles(void)
2591 {
2592 maybe_redirect_std_handle(L"GIT_REDIRECT_STDIN", STD_INPUT_HANDLE, 0,
2593 GENERIC_READ, FILE_ATTRIBUTE_NORMAL);
2594 maybe_redirect_std_handle(L"GIT_REDIRECT_STDOUT", STD_OUTPUT_HANDLE, 1,
2595 GENERIC_WRITE, FILE_ATTRIBUTE_NORMAL);
2596 maybe_redirect_std_handle(L"GIT_REDIRECT_STDERR", STD_ERROR_HANDLE, 2,
2597 GENERIC_WRITE, FILE_FLAG_NO_BUFFERING);
2598 }
2599
2600 void mingw_startup(void)
2601 {
2602 int i, maxlen, argc;
2603 char *buffer;
2604 wchar_t **wenv, **wargv;
2605 _startupinfo si;
2606
2607 maybe_redirect_std_handles();
2608
2609 /* get wide char arguments and environment */
2610 si.newmode = 0;
2611 if (__wgetmainargs(&argc, &wargv, &wenv, _CRT_glob, &si) < 0)
2612 die_startup();
2613
2614 /* determine size of argv and environ conversion buffer */
2615 maxlen = wcslen(wargv[0]);
2616 for (i = 1; i < argc; i++)
2617 maxlen = max(maxlen, wcslen(wargv[i]));
2618
2619 /* allocate buffer (wchar_t encodes to max 3 UTF-8 bytes) */
2620 maxlen = 3 * maxlen + 1;
2621 buffer = malloc_startup(maxlen);
2622
2623 /* convert command line arguments and environment to UTF-8 */
2624 for (i = 0; i < argc; i++)
2625 __argv[i] = wcstoutfdup_startup(buffer, wargv[i], maxlen);
2626 free(buffer);
2627
2628 /* fix Windows specific environment settings */
2629 setup_windows_environment();
2630
2631 unset_environment_variables = xstrdup("PERL5LIB");
2632
2633 /* initialize critical section for waitpid pinfo_t list */
2634 InitializeCriticalSection(&pinfo_cs);
2635
2636 /* set up default file mode and file modes for stdin/out/err */
2637 _fmode = _O_BINARY;
2638 _setmode(_fileno(stdin), _O_BINARY);
2639 _setmode(_fileno(stdout), _O_BINARY);
2640 _setmode(_fileno(stderr), _O_BINARY);
2641
2642 /* initialize Unicode console */
2643 winansi_init();
2644 }
2645
2646 int uname(struct utsname *buf)
2647 {
2648 unsigned v = (unsigned)GetVersion();
2649 memset(buf, 0, sizeof(*buf));
2650 xsnprintf(buf->sysname, sizeof(buf->sysname), "Windows");
2651 xsnprintf(buf->release, sizeof(buf->release),
2652 "%u.%u", v & 0xff, (v >> 8) & 0xff);
2653 /* assuming NT variants only.. */
2654 xsnprintf(buf->version, sizeof(buf->version),
2655 "%u", (v >> 16) & 0x7fff);
2656 return 0;
2657 }
Unnamed repository; edit this file 'description' to name the repository.