2c3e27ce9e11e368ea60039cc9783a6d18acffb3
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#define HCAST(type, handle) ((type)(intptr_t)handle)
10static const int delay[] = { 0, 1, 10, 20, 40 };
12int err_win_to_posix(DWORD winerr)
14{
15 int error = ENOSYS;
16 switch(winerr) {
17 case ERROR_ACCESS_DENIED: error = EACCES; break;
18 case ERROR_ACCOUNT_DISABLED: error = EACCES; break;
19 case ERROR_ACCOUNT_RESTRICTION: error = EACCES; break;
20 case ERROR_ALREADY_ASSIGNED: error = EBUSY; break;
21 case ERROR_ALREADY_EXISTS: error = EEXIST; break;
22 case ERROR_ARITHMETIC_OVERFLOW: error = ERANGE; break;
23 case ERROR_BAD_COMMAND: error = EIO; break;
24 case ERROR_BAD_DEVICE: error = ENODEV; break;
25 case ERROR_BAD_DRIVER_LEVEL: error = ENXIO; break;
26 case ERROR_BAD_EXE_FORMAT: error = ENOEXEC; break;
27 case ERROR_BAD_FORMAT: error = ENOEXEC; break;
28 case ERROR_BAD_LENGTH: error = EINVAL; break;
29 case ERROR_BAD_PATHNAME: error = ENOENT; break;
30 case ERROR_BAD_PIPE: error = EPIPE; break;
31 case ERROR_BAD_UNIT: error = ENODEV; break;
32 case ERROR_BAD_USERNAME: error = EINVAL; break;
33 case ERROR_BROKEN_PIPE: error = EPIPE; break;
34 case ERROR_BUFFER_OVERFLOW: error = ENAMETOOLONG; break;
35 case ERROR_BUSY: error = EBUSY; break;
36 case ERROR_BUSY_DRIVE: error = EBUSY; break;
37 case ERROR_CALL_NOT_IMPLEMENTED: error = ENOSYS; break;
38 case ERROR_CANNOT_MAKE: error = EACCES; break;
39 case ERROR_CANTOPEN: error = EIO; break;
40 case ERROR_CANTREAD: error = EIO; break;
41 case ERROR_CANTWRITE: error = EIO; break;
42 case ERROR_CRC: error = EIO; break;
43 case ERROR_CURRENT_DIRECTORY: error = EACCES; break;
44 case ERROR_DEVICE_IN_USE: error = EBUSY; break;
45 case ERROR_DEV_NOT_EXIST: error = ENODEV; break;
46 case ERROR_DIRECTORY: error = EINVAL; break;
47 case ERROR_DIR_NOT_EMPTY: error = ENOTEMPTY; break;
48 case ERROR_DISK_CHANGE: error = EIO; break;
49 case ERROR_DISK_FULL: error = ENOSPC; break;
50 case ERROR_DRIVE_LOCKED: error = EBUSY; break;
51 case ERROR_ENVVAR_NOT_FOUND: error = EINVAL; break;
52 case ERROR_EXE_MARKED_INVALID: error = ENOEXEC; break;
53 case ERROR_FILENAME_EXCED_RANGE: error = ENAMETOOLONG; break;
54 case ERROR_FILE_EXISTS: error = EEXIST; break;
55 case ERROR_FILE_INVALID: error = ENODEV; break;
56 case ERROR_FILE_NOT_FOUND: error = ENOENT; break;
57 case ERROR_GEN_FAILURE: error = EIO; break;
58 case ERROR_HANDLE_DISK_FULL: error = ENOSPC; break;
59 case ERROR_INSUFFICIENT_BUFFER: error = ENOMEM; break;
60 case ERROR_INVALID_ACCESS: error = EACCES; break;
61 case ERROR_INVALID_ADDRESS: error = EFAULT; break;
62 case ERROR_INVALID_BLOCK: error = EFAULT; break;
63 case ERROR_INVALID_DATA: error = EINVAL; break;
64 case ERROR_INVALID_DRIVE: error = ENODEV; break;
65 case ERROR_INVALID_EXE_SIGNATURE: error = ENOEXEC; break;
66 case ERROR_INVALID_FLAGS: error = EINVAL; break;
67 case ERROR_INVALID_FUNCTION: error = ENOSYS; break;
68 case ERROR_INVALID_HANDLE: error = EBADF; break;
69 case ERROR_INVALID_LOGON_HOURS: error = EACCES; break;
70 case ERROR_INVALID_NAME: error = EINVAL; break;
71 case ERROR_INVALID_OWNER: error = EINVAL; break;
72 case ERROR_INVALID_PARAMETER: error = EINVAL; break;
73 case ERROR_INVALID_PASSWORD: error = EPERM; break;
74 case ERROR_INVALID_PRIMARY_GROUP: error = EINVAL; break;
75 case ERROR_INVALID_SIGNAL_NUMBER: error = EINVAL; break;
76 case ERROR_INVALID_TARGET_HANDLE: error = EIO; break;
77 case ERROR_INVALID_WORKSTATION: error = EACCES; break;
78 case ERROR_IO_DEVICE: error = EIO; break;
79 case ERROR_IO_INCOMPLETE: error = EINTR; break;
80 case ERROR_LOCKED: error = EBUSY; break;
81 case ERROR_LOCK_VIOLATION: error = EACCES; break;
82 case ERROR_LOGON_FAILURE: error = EACCES; break;
83 case ERROR_MAPPED_ALIGNMENT: error = EINVAL; break;
84 case ERROR_META_EXPANSION_TOO_LONG: error = E2BIG; break;
85 case ERROR_MORE_DATA: error = EPIPE; break;
86 case ERROR_NEGATIVE_SEEK: error = ESPIPE; break;
87 case ERROR_NOACCESS: error = EFAULT; break;
88 case ERROR_NONE_MAPPED: error = EINVAL; break;
89 case ERROR_NOT_ENOUGH_MEMORY: error = ENOMEM; break;
90 case ERROR_NOT_READY: error = EAGAIN; break;
91 case ERROR_NOT_SAME_DEVICE: error = EXDEV; break;
92 case ERROR_NO_DATA: error = EPIPE; break;
93 case ERROR_NO_MORE_SEARCH_HANDLES: error = EIO; break;
94 case ERROR_NO_PROC_SLOTS: error = EAGAIN; break;
95 case ERROR_NO_SUCH_PRIVILEGE: error = EACCES; break;
96 case ERROR_OPEN_FAILED: error = EIO; break;
97 case ERROR_OPEN_FILES: error = EBUSY; break;
98 case ERROR_OPERATION_ABORTED: error = EINTR; break;
99 case ERROR_OUTOFMEMORY: error = ENOMEM; break;
100 case ERROR_PASSWORD_EXPIRED: error = EACCES; break;
101 case ERROR_PATH_BUSY: error = EBUSY; break;
102 case ERROR_PATH_NOT_FOUND: error = ENOENT; break;
103 case ERROR_PIPE_BUSY: error = EBUSY; break;
104 case ERROR_PIPE_CONNECTED: error = EPIPE; break;
105 case ERROR_PIPE_LISTENING: error = EPIPE; break;
106 case ERROR_PIPE_NOT_CONNECTED: error = EPIPE; break;
107 case ERROR_PRIVILEGE_NOT_HELD: error = EACCES; break;
108 case ERROR_READ_FAULT: error = EIO; break;
109 case ERROR_SEEK: error = EIO; break;
110 case ERROR_SEEK_ON_DEVICE: error = ESPIPE; break;
111 case ERROR_SHARING_BUFFER_EXCEEDED: error = ENFILE; break;
112 case ERROR_SHARING_VIOLATION: error = EACCES; break;
113 case ERROR_STACK_OVERFLOW: error = ENOMEM; break;
114 case ERROR_SWAPERROR: error = ENOENT; break;
115 case ERROR_TOO_MANY_MODULES: error = EMFILE; break;
116 case ERROR_TOO_MANY_OPEN_FILES: error = EMFILE; break;
117 case ERROR_UNRECOGNIZED_MEDIA: error = ENXIO; break;
118 case ERROR_UNRECOGNIZED_VOLUME: error = ENODEV; break;
119 case ERROR_WAIT_NO_CHILDREN: error = ECHILD; break;
120 case ERROR_WRITE_FAULT: error = EIO; break;
121 case ERROR_WRITE_PROTECT: error = EROFS; break;
122 }
123 return error;
124}
125static inline int is_file_in_use_error(DWORD errcode)
127{
128 switch (errcode) {
129 case ERROR_SHARING_VIOLATION:
130 case ERROR_ACCESS_DENIED:
131 return 1;
132 }
133 return 0;
135}
136static int read_yes_no_answer(void)
138{
139 char answer[1024];
140 if (fgets(answer, sizeof(answer), stdin)) {
142 size_t answer_len = strlen(answer);
143 int got_full_line = 0, c;
144 /* remove the newline */
146 if (answer_len >= 2 && answer[answer_len-2] == '\r') {
147 answer[answer_len-2] = '\0';
148 got_full_line = 1;
149 } else if (answer_len >= 1 && answer[answer_len-1] == '\n') {
150 answer[answer_len-1] = '\0';
151 got_full_line = 1;
152 }
153 /* flush the buffer in case we did not get the full line */
154 if (!got_full_line)
155 while ((c = getchar()) != EOF && c != '\n')
156 ;
157 } else
158 /* we could not read, return the
159 * default answer which is no */
160 return 0;
161 if (tolower(answer[0]) == 'y' && !answer[1])
163 return 1;
164 if (!strncasecmp(answer, "yes", sizeof(answer)))
165 return 1;
166 if (tolower(answer[0]) == 'n' && !answer[1])
167 return 0;
168 if (!strncasecmp(answer, "no", sizeof(answer)))
169 return 0;
170 /* did not find an answer we understand */
172 return -1;
173}
174static int ask_yes_no_if_possible(const char *format, ...)
176{
177 char question[4096];
178 const char *retry_hook[] = { NULL, NULL, NULL };
179 va_list args;
180 va_start(args, format);
182 vsnprintf(question, sizeof(question), format, args);
183 va_end(args);
184 if ((retry_hook[0] = mingw_getenv("GIT_ASK_YESNO"))) {
186 retry_hook[1] = question;
187 return !run_command_v_opt(retry_hook, 0);
188 }
189 if (!isatty(_fileno(stdin)) || !isatty(_fileno(stderr)))
191 return 0;
192 while (1) {
194 int answer;
195 fprintf(stderr, "%s (y/n) ", question);
196 if ((answer = read_yes_no_answer()) >= 0)
198 return answer;
199 fprintf(stderr, "Sorry, I did not understand your answer. "
201 "Please type 'y' or 'n'\n");
202 }
203}
204int mingw_unlink(const char *pathname)
206{
207 int ret, tries = 0;
208 wchar_t wpathname[MAX_PATH];
209 if (xutftowcs_path(wpathname, pathname) < 0)
210 return -1;
211 /* read-only files cannot be removed */
213 _wchmod(wpathname, 0666);
214 while ((ret = _wunlink(wpathname)) == -1 && tries < ARRAY_SIZE(delay)) {
215 if (!is_file_in_use_error(GetLastError()))
216 break;
217 /*
218 * We assume that some other process had the source or
219 * destination file open at the wrong moment and retry.
220 * In order to give the other process a higher chance to
221 * complete its operation, we give up our time slice now.
222 * If we have to retry again, we do sleep a bit.
223 */
224 Sleep(delay[tries]);
225 tries++;
226 }
227 while (ret == -1 && is_file_in_use_error(GetLastError()) &&
228 ask_yes_no_if_possible("Unlink of file '%s' failed. "
229 "Should I try again?", pathname))
230 ret = _wunlink(wpathname);
231 return ret;
232}
233static int is_dir_empty(const wchar_t *wpath)
235{
236 WIN32_FIND_DATAW findbuf;
237 HANDLE handle;
238 wchar_t wbuf[MAX_PATH + 2];
239 wcscpy(wbuf, wpath);
240 wcscat(wbuf, L"\\*");
241 handle = FindFirstFileW(wbuf, &findbuf);
242 if (handle == INVALID_HANDLE_VALUE)
243 return GetLastError() == ERROR_NO_MORE_FILES;
244 while (!wcscmp(findbuf.cFileName, L".") ||
246 !wcscmp(findbuf.cFileName, L".."))
247 if (!FindNextFileW(handle, &findbuf)) {
248 DWORD err = GetLastError();
249 FindClose(handle);
250 return err == ERROR_NO_MORE_FILES;
251 }
252 FindClose(handle);
253 return 0;
254}
255int mingw_rmdir(const char *pathname)
257{
258 int ret, tries = 0;
259 wchar_t wpathname[MAX_PATH];
260 if (xutftowcs_path(wpathname, pathname) < 0)
261 return -1;
262 while ((ret = _wrmdir(wpathname)) == -1 && tries < ARRAY_SIZE(delay)) {
264 if (!is_file_in_use_error(GetLastError()))
265 errno = err_win_to_posix(GetLastError());
266 if (errno != EACCES)
267 break;
268 if (!is_dir_empty(wpathname)) {
269 errno = ENOTEMPTY;
270 break;
271 }
272 /*
273 * We assume that some other process had the source or
274 * destination file open at the wrong moment and retry.
275 * In order to give the other process a higher chance to
276 * complete its operation, we give up our time slice now.
277 * If we have to retry again, we do sleep a bit.
278 */
279 Sleep(delay[tries]);
280 tries++;
281 }
282 while (ret == -1 && errno == EACCES && is_file_in_use_error(GetLastError()) &&
283 ask_yes_no_if_possible("Deletion of directory '%s' failed. "
284 "Should I try again?", pathname))
285 ret = _wrmdir(wpathname);
286 return ret;
287}
288static inline int needs_hiding(const char *path)
290{
291 const char *basename;
292 if (hide_dotfiles == HIDE_DOTFILES_FALSE)
294 return 0;
295 /* We cannot use basename(), as it would remove trailing slashes */
297 mingw_skip_dos_drive_prefix((char **)&path);
298 if (!*path)
299 return 0;
300 for (basename = path; *path; path++)
302 if (is_dir_sep(*path)) {
303 do {
304 path++;
305 } while (is_dir_sep(*path));
306 /* ignore trailing slashes */
307 if (*path)
308 basename = path;
309 }
310 if (hide_dotfiles == HIDE_DOTFILES_TRUE)
312 return *basename == '.';
313 assert(hide_dotfiles == HIDE_DOTFILES_DOTGITONLY);
315 return !strncasecmp(".git", basename, 4) &&
316 (!basename[4] || is_dir_sep(basename[4]));
317}
318static int set_hidden_flag(const wchar_t *path, int set)
320{
321 DWORD original = GetFileAttributesW(path), modified;
322 if (set)
323 modified = original | FILE_ATTRIBUTE_HIDDEN;
324 else
325 modified = original & ~FILE_ATTRIBUTE_HIDDEN;
326 if (original == modified || SetFileAttributesW(path, modified))
327 return 0;
328 errno = err_win_to_posix(GetLastError());
329 return -1;
330}
331int mingw_mkdir(const char *path, int mode)
333{
334 int ret;
335 wchar_t wpath[MAX_PATH];
336 if (xutftowcs_path(wpath, path) < 0)
337 return -1;
338 ret = _wmkdir(wpath);
339 if (!ret && needs_hiding(path))
340 return set_hidden_flag(wpath, 1);
341 return ret;
342}
343/*
345 * Calling CreateFile() using FILE_APPEND_DATA and without FILE_WRITE_DATA
346 * is documented in [1] as opening a writable file handle in append mode.
347 * (It is believed that) this is atomic since it is maintained by the
348 * kernel unlike the O_APPEND flag which is racily maintained by the CRT.
349 *
350 * [1] https://docs.microsoft.com/en-us/windows/desktop/fileio/file-access-rights-constants
351 *
352 * This trick does not appear to work for named pipes. Instead it creates
353 * a named pipe client handle that cannot be written to. Callers should
354 * just use the regular _wopen() for them. (And since client handle gets
355 * bound to a unique server handle, it isn't really an issue.)
356 */
357static int mingw_open_append(wchar_t const *wfilename, int oflags, ...)
358{
359 HANDLE handle;
360 int fd;
361 DWORD create = (oflags & O_CREAT) ? OPEN_ALWAYS : OPEN_EXISTING;
362 /* only these flags are supported */
364 if ((oflags & ~O_CREAT) != (O_WRONLY | O_APPEND))
365 return errno = ENOSYS, -1;
366 /*
368 * FILE_SHARE_WRITE is required to permit child processes
369 * to append to the file.
370 */
371 handle = CreateFileW(wfilename, FILE_APPEND_DATA,
372 FILE_SHARE_WRITE | FILE_SHARE_READ,
373 NULL, create, FILE_ATTRIBUTE_NORMAL, NULL);
374 if (handle == INVALID_HANDLE_VALUE)
375 return errno = err_win_to_posix(GetLastError()), -1;
376 /*
378 * No O_APPEND here, because the CRT uses it only to reset the
379 * file pointer to EOF before each write(); but that is not
380 * necessary (and may lead to races) for a file created with
381 * FILE_APPEND_DATA.
382 */
383 fd = _open_osfhandle((intptr_t)handle, O_BINARY);
384 if (fd < 0)
385 CloseHandle(handle);
386 return fd;
387}
388/*
390 * Does the pathname map to the local named pipe filesystem?
391 * That is, does it have a "//./pipe/" prefix?
392 */
393static int is_local_named_pipe_path(const char *filename)
394{
395 return (is_dir_sep(filename[0]) &&
396 is_dir_sep(filename[1]) &&
397 filename[2] == '.' &&
398 is_dir_sep(filename[3]) &&
399 !strncasecmp(filename+4, "pipe", 4) &&
400 is_dir_sep(filename[8]) &&
401 filename[9]);
402}
403int mingw_open (const char *filename, int oflags, ...)
405{
406 typedef int (*open_fn_t)(wchar_t const *wfilename, int oflags, ...);
407 va_list args;
408 unsigned mode;
409 int fd;
410 wchar_t wfilename[MAX_PATH];
411 open_fn_t open_fn;
412 va_start(args, oflags);
414 mode = va_arg(args, int);
415 va_end(args);
416 if (filename && !strcmp(filename, "/dev/null"))
418 filename = "nul";
419 if ((oflags & O_APPEND) && !is_local_named_pipe_path(filename))
421 open_fn = mingw_open_append;
422 else
423 open_fn = _wopen;
424 if (xutftowcs_path(wfilename, filename) < 0)
426 return -1;
427 fd = open_fn(wfilename, oflags, mode);
428 if (fd < 0 && (oflags & O_ACCMODE) != O_RDONLY && errno == EACCES) {
430 DWORD attrs = GetFileAttributesW(wfilename);
431 if (attrs != INVALID_FILE_ATTRIBUTES && (attrs & FILE_ATTRIBUTE_DIRECTORY))
432 errno = EISDIR;
433 }
434 if ((oflags & O_CREAT) && needs_hiding(filename)) {
435 /*
436 * Internally, _wopen() uses the CreateFile() API which errors
437 * out with an ERROR_ACCESS_DENIED if CREATE_ALWAYS was
438 * specified and an already existing file's attributes do not
439 * match *exactly*. As there is no mode or flag we can set that
440 * would correspond to FILE_ATTRIBUTE_HIDDEN, let's just try
441 * again *without* the O_CREAT flag (that corresponds to the
442 * CREATE_ALWAYS flag of CreateFile()).
443 */
444 if (fd < 0 && errno == EACCES)
445 fd = open_fn(wfilename, oflags & ~O_CREAT, mode);
446 if (fd >= 0 && set_hidden_flag(wfilename, 1))
447 warning("could not mark '%s' as hidden.", filename);
448 }
449 return fd;
450}
451static BOOL WINAPI ctrl_ignore(DWORD type)
453{
454 return TRUE;
455}
456#undef fgetc
458int mingw_fgetc(FILE *stream)
459{
460 int ch;
461 if (!isatty(_fileno(stream)))
462 return fgetc(stream);
463 SetConsoleCtrlHandler(ctrl_ignore, TRUE);
465 while (1) {
466 ch = fgetc(stream);
467 if (ch != EOF || GetLastError() != ERROR_OPERATION_ABORTED)
468 break;
469 /* Ctrl+C was pressed, simulate SIGINT and retry */
471 mingw_raise(SIGINT);
472 }
473 SetConsoleCtrlHandler(ctrl_ignore, FALSE);
474 return ch;
475}
476#undef fopen
478FILE *mingw_fopen (const char *filename, const char *otype)
479{
480 int hide = needs_hiding(filename);
481 FILE *file;
482 wchar_t wfilename[MAX_PATH], wotype[4];
483 if (filename && !strcmp(filename, "/dev/null"))
484 filename = "nul";
485 if (xutftowcs_path(wfilename, filename) < 0 ||
486 xutftowcs(wotype, otype, ARRAY_SIZE(wotype)) < 0)
487 return NULL;
488 if (hide && !access(filename, F_OK) && set_hidden_flag(wfilename, 0)) {
489 error("could not unhide %s", filename);
490 return NULL;
491 }
492 file = _wfopen(wfilename, wotype);
493 if (!file && GetLastError() == ERROR_INVALID_NAME)
494 errno = ENOENT;
495 if (file && hide && set_hidden_flag(wfilename, 1))
496 warning("could not mark '%s' as hidden.", filename);
497 return file;
498}
499FILE *mingw_freopen (const char *filename, const char *otype, FILE *stream)
501{
502 int hide = needs_hiding(filename);
503 FILE *file;
504 wchar_t wfilename[MAX_PATH], wotype[4];
505 if (filename && !strcmp(filename, "/dev/null"))
506 filename = "nul";
507 if (xutftowcs_path(wfilename, filename) < 0 ||
508 xutftowcs(wotype, otype, ARRAY_SIZE(wotype)) < 0)
509 return NULL;
510 if (hide && !access(filename, F_OK) && set_hidden_flag(wfilename, 0)) {
511 error("could not unhide %s", filename);
512 return NULL;
513 }
514 file = _wfreopen(wfilename, wotype, stream);
515 if (file && hide && set_hidden_flag(wfilename, 1))
516 warning("could not mark '%s' as hidden.", filename);
517 return file;
518}
519#undef fflush
521int mingw_fflush(FILE *stream)
522{
523 int ret = fflush(stream);
524 /*
526 * write() is used behind the scenes of stdio output functions.
527 * Since git code does not check for errors after each stdio write
528 * operation, it can happen that write() is called by a later
529 * stdio function even if an earlier write() call failed. In the
530 * case of a pipe whose readable end was closed, only the first
531 * call to write() reports EPIPE on Windows. Subsequent write()
532 * calls report EINVAL. It is impossible to notice whether this
533 * fflush invocation triggered such a case, therefore, we have to
534 * catch all EINVAL errors whole-sale.
535 */
536 if (ret && errno == EINVAL)
537 errno = EPIPE;
538 return ret;
540}
541#undef write
543ssize_t mingw_write(int fd, const void *buf, size_t len)
544{
545 ssize_t result = write(fd, buf, len);
546 if (result < 0 && errno == EINVAL && buf) {
548 /* check if fd is a pipe */
549 HANDLE h = (HANDLE) _get_osfhandle(fd);
550 if (GetFileType(h) == FILE_TYPE_PIPE)
551 errno = EPIPE;
552 else
553 errno = EINVAL;
554 }
555 return result;
557}
558int mingw_access(const char *filename, int mode)
560{
561 wchar_t wfilename[MAX_PATH];
562 if (xutftowcs_path(wfilename, filename) < 0)
563 return -1;
564 /* X_OK is not supported by the MSVCRT version */
565 return _waccess(wfilename, mode & ~X_OK);
566}
567int mingw_chdir(const char *dirname)
569{
570 wchar_t wdirname[MAX_PATH];
571 if (xutftowcs_path(wdirname, dirname) < 0)
572 return -1;
573 return _wchdir(wdirname);
574}
575int mingw_chmod(const char *filename, int mode)
577{
578 wchar_t wfilename[MAX_PATH];
579 if (xutftowcs_path(wfilename, filename) < 0)
580 return -1;
581 return _wchmod(wfilename, mode);
582}
583/*
585 * The unit of FILETIME is 100-nanoseconds since January 1, 1601, UTC.
586 * Returns the 100-nanoseconds ("hekto nanoseconds") since the epoch.
587 */
588static inline long long filetime_to_hnsec(const FILETIME *ft)
589{
590 long long winTime = ((long long)ft->dwHighDateTime << 32) + ft->dwLowDateTime;
591 /* Windows to Unix Epoch conversion */
592 return winTime - 116444736000000000LL;
593}
594static inline time_t filetime_to_time_t(const FILETIME *ft)
596{
597 return (time_t)(filetime_to_hnsec(ft) / 10000000);
598}
599/**
601 * Verifies that safe_create_leading_directories() would succeed.
602 */
603static int has_valid_directory_prefix(wchar_t *wfilename)
604{
605 int n = wcslen(wfilename);
606 while (n > 0) {
608 wchar_t c = wfilename[--n];
609 DWORD attributes;
610 if (!is_dir_sep(c))
612 continue;
613 wfilename[n] = L'\0';
615 attributes = GetFileAttributesW(wfilename);
616 wfilename[n] = c;
617 if (attributes == FILE_ATTRIBUTE_DIRECTORY ||
618 attributes == FILE_ATTRIBUTE_DEVICE)
619 return 1;
620 if (attributes == INVALID_FILE_ATTRIBUTES)
621 switch (GetLastError()) {
622 case ERROR_PATH_NOT_FOUND:
623 continue;
624 case ERROR_FILE_NOT_FOUND:
625 /* This implies parent directory exists. */
626 return 1;
627 }
628 return 0;
629 }
630 return 1;
631}
632/* We keep the do_lstat code in a separate function to avoid recursion.
634 * When a path ends with a slash, the stat will fail with ENOENT. In
635 * this case, we strip the trailing slashes and stat again.
636 *
637 * If follow is true then act like stat() and report on the link
638 * target. Otherwise report on the link itself.
639 */
640static int do_lstat(int follow, const char *file_name, struct stat *buf)
641{
642 WIN32_FILE_ATTRIBUTE_DATA fdata;
643 wchar_t wfilename[MAX_PATH];
644 if (xutftowcs_path(wfilename, file_name) < 0)
645 return -1;
646 if (GetFileAttributesExW(wfilename, GetFileExInfoStandard, &fdata)) {
648 buf->st_ino = 0;
649 buf->st_gid = 0;
650 buf->st_uid = 0;
651 buf->st_nlink = 1;
652 buf->st_mode = file_attr_to_st_mode(fdata.dwFileAttributes);
653 buf->st_size = fdata.nFileSizeLow |
654 (((off_t)fdata.nFileSizeHigh)<<32);
655 buf->st_dev = buf->st_rdev = 0; /* not used by Git */
656 buf->st_atime = filetime_to_time_t(&(fdata.ftLastAccessTime));
657 buf->st_mtime = filetime_to_time_t(&(fdata.ftLastWriteTime));
658 buf->st_ctime = filetime_to_time_t(&(fdata.ftCreationTime));
659 if (fdata.dwFileAttributes & FILE_ATTRIBUTE_REPARSE_POINT) {
660 WIN32_FIND_DATAW findbuf;
661 HANDLE handle = FindFirstFileW(wfilename, &findbuf);
662 if (handle != INVALID_HANDLE_VALUE) {
663 if ((findbuf.dwFileAttributes & FILE_ATTRIBUTE_REPARSE_POINT) &&
664 (findbuf.dwReserved0 == IO_REPARSE_TAG_SYMLINK)) {
665 if (follow) {
666 char buffer[MAXIMUM_REPARSE_DATA_BUFFER_SIZE];
667 buf->st_size = readlink(file_name, buffer, MAXIMUM_REPARSE_DATA_BUFFER_SIZE);
668 } else {
669 buf->st_mode = S_IFLNK;
670 }
671 buf->st_mode |= S_IREAD;
672 if (!(findbuf.dwFileAttributes & FILE_ATTRIBUTE_READONLY))
673 buf->st_mode |= S_IWRITE;
674 }
675 FindClose(handle);
676 }
677 }
678 return 0;
679 }
680 switch (GetLastError()) {
681 case ERROR_ACCESS_DENIED:
682 case ERROR_SHARING_VIOLATION:
683 case ERROR_LOCK_VIOLATION:
684 case ERROR_SHARING_BUFFER_EXCEEDED:
685 errno = EACCES;
686 break;
687 case ERROR_BUFFER_OVERFLOW:
688 errno = ENAMETOOLONG;
689 break;
690 case ERROR_NOT_ENOUGH_MEMORY:
691 errno = ENOMEM;
692 break;
693 case ERROR_PATH_NOT_FOUND:
694 if (!has_valid_directory_prefix(wfilename)) {
695 errno = ENOTDIR;
696 break;
697 }
698 /* fallthru */
699 default:
700 errno = ENOENT;
701 break;
702 }
703 return -1;
704}
705/* We provide our own lstat/fstat functions, since the provided
707 * lstat/fstat functions are so slow. These stat functions are
708 * tailored for Git's usage (read: fast), and are not meant to be
709 * complete. Note that Git stat()s are redirected to mingw_lstat()
710 * too, since Windows doesn't really handle symlinks that well.
711 */
712static int do_stat_internal(int follow, const char *file_name, struct stat *buf)
713{
714 int namelen;
715 char alt_name[PATH_MAX];
716 if (!do_lstat(follow, file_name, buf))
718 return 0;
719 /* if file_name ended in a '/', Windows returned ENOENT;
721 * try again without trailing slashes
722 */
723 if (errno != ENOENT)
724 return -1;
725 namelen = strlen(file_name);
727 if (namelen && file_name[namelen-1] != '/')
728 return -1;
729 while (namelen && file_name[namelen-1] == '/')
730 --namelen;
731 if (!namelen || namelen >= PATH_MAX)
732 return -1;
733 memcpy(alt_name, file_name, namelen);
735 alt_name[namelen] = 0;
736 return do_lstat(follow, alt_name, buf);
737}
738int mingw_lstat(const char *file_name, struct stat *buf)
740{
741 return do_stat_internal(0, file_name, buf);
742}
743int mingw_stat(const char *file_name, struct stat *buf)
744{
745 return do_stat_internal(1, file_name, buf);
746}
747int mingw_fstat(int fd, struct stat *buf)
749{
750 HANDLE fh = (HANDLE)_get_osfhandle(fd);
751 BY_HANDLE_FILE_INFORMATION fdata;
752 if (fh == INVALID_HANDLE_VALUE) {
754 errno = EBADF;
755 return -1;
756 }
757 /* direct non-file handles to MS's fstat() */
758 if (GetFileType(fh) != FILE_TYPE_DISK)
759 return _fstati64(fd, buf);
760 if (GetFileInformationByHandle(fh, &fdata)) {
762 buf->st_ino = 0;
763 buf->st_gid = 0;
764 buf->st_uid = 0;
765 buf->st_nlink = 1;
766 buf->st_mode = file_attr_to_st_mode(fdata.dwFileAttributes);
767 buf->st_size = fdata.nFileSizeLow |
768 (((off_t)fdata.nFileSizeHigh)<<32);
769 buf->st_dev = buf->st_rdev = 0; /* not used by Git */
770 buf->st_atime = filetime_to_time_t(&(fdata.ftLastAccessTime));
771 buf->st_mtime = filetime_to_time_t(&(fdata.ftLastWriteTime));
772 buf->st_ctime = filetime_to_time_t(&(fdata.ftCreationTime));
773 return 0;
774 }
775 errno = EBADF;
776 return -1;
777}
778static inline void time_t_to_filetime(time_t t, FILETIME *ft)
780{
781 long long winTime = t * 10000000LL + 116444736000000000LL;
782 ft->dwLowDateTime = winTime;
783 ft->dwHighDateTime = winTime >> 32;
784}
785int mingw_utime (const char *file_name, const struct utimbuf *times)
787{
788 FILETIME mft, aft;
789 int fh, rc;
790 DWORD attrs;
791 wchar_t wfilename[MAX_PATH];
792 if (xutftowcs_path(wfilename, file_name) < 0)
793 return -1;
794 /* must have write permission */
796 attrs = GetFileAttributesW(wfilename);
797 if (attrs != INVALID_FILE_ATTRIBUTES &&
798 (attrs & FILE_ATTRIBUTE_READONLY)) {
799 /* ignore errors here; open() will report them */
800 SetFileAttributesW(wfilename, attrs & ~FILE_ATTRIBUTE_READONLY);
801 }
802 if ((fh = _wopen(wfilename, O_RDWR | O_BINARY)) < 0) {
804 rc = -1;
805 goto revert_attrs;
806 }
807 if (times) {
809 time_t_to_filetime(times->modtime, &mft);
810 time_t_to_filetime(times->actime, &aft);
811 } else {
812 GetSystemTimeAsFileTime(&mft);
813 aft = mft;
814 }
815 if (!SetFileTime((HANDLE)_get_osfhandle(fh), NULL, &aft, &mft)) {
816 errno = EINVAL;
817 rc = -1;
818 } else
819 rc = 0;
820 close(fh);
821revert_attrs:
823 if (attrs != INVALID_FILE_ATTRIBUTES &&
824 (attrs & FILE_ATTRIBUTE_READONLY)) {
825 /* ignore errors again */
826 SetFileAttributesW(wfilename, attrs);
827 }
828 return rc;
829}
830#undef strftime
832size_t mingw_strftime(char *s, size_t max,
833 const char *format, const struct tm *tm)
834{
835 size_t ret = strftime(s, max, format, tm);
836 if (!ret && errno == EINVAL)
838 die("invalid strftime format: '%s'", format);
839 return ret;
840}
841unsigned int sleep (unsigned int seconds)
843{
844 Sleep(seconds*1000);
845 return 0;
846}
847char *mingw_mktemp(char *template)
849{
850 wchar_t wtemplate[MAX_PATH];
851 if (xutftowcs_path(wtemplate, template) < 0)
852 return NULL;
853 if (!_wmktemp(wtemplate))
854 return NULL;
855 if (xwcstoutf(template, wtemplate, strlen(template) + 1) < 0)
856 return NULL;
857 return template;
858}
859int mkstemp(char *template)
861{
862 char *filename = mktemp(template);
863 if (filename == NULL)
864 return -1;
865 return open(filename, O_RDWR | O_CREAT, 0600);
866}
867int gettimeofday(struct timeval *tv, void *tz)
869{
870 FILETIME ft;
871 long long hnsec;
872 GetSystemTimeAsFileTime(&ft);
874 hnsec = filetime_to_hnsec(&ft);
875 tv->tv_sec = hnsec / 10000000;
876 tv->tv_usec = (hnsec % 10000000) / 10;
877 return 0;
878}
879int pipe(int filedes[2])
881{
882 HANDLE h[2];
883 /* this creates non-inheritable handles */
885 if (!CreatePipe(&h[0], &h[1], NULL, 8192)) {
886 errno = err_win_to_posix(GetLastError());
887 return -1;
888 }
889 filedes[0] = _open_osfhandle(HCAST(int, h[0]), O_NOINHERIT);
890 if (filedes[0] < 0) {
891 CloseHandle(h[0]);
892 CloseHandle(h[1]);
893 return -1;
894 }
895 filedes[1] = _open_osfhandle(HCAST(int, h[1]), O_NOINHERIT);
896 if (filedes[1] < 0) {
897 close(filedes[0]);
898 CloseHandle(h[1]);
899 return -1;
900 }
901 return 0;
902}
903struct tm *gmtime_r(const time_t *timep, struct tm *result)
905{
906 /* gmtime() in MSVCRT.DLL is thread-safe, but not reentrant */
907 memcpy(result, gmtime(timep), sizeof(struct tm));
908 return result;
909}
910struct tm *localtime_r(const time_t *timep, struct tm *result)
912{
913 /* localtime() in MSVCRT.DLL is thread-safe, but not reentrant */
914 memcpy(result, localtime(timep), sizeof(struct tm));
915 return result;
916}
917char *mingw_getcwd(char *pointer, int len)
919{
920 wchar_t cwd[MAX_PATH], wpointer[MAX_PATH];
921 DWORD ret = GetCurrentDirectoryW(ARRAY_SIZE(cwd), cwd);
922 if (!ret || ret >= ARRAY_SIZE(cwd)) {
924 errno = ret ? ENAMETOOLONG : err_win_to_posix(GetLastError());
925 return NULL;
926 }
927 ret = GetLongPathNameW(cwd, wpointer, ARRAY_SIZE(wpointer));
928 if (!ret || ret >= ARRAY_SIZE(wpointer))
929 return NULL;
930 if (xwcstoutf(pointer, wpointer, len) < 0)
931 return NULL;
932 convert_slashes(pointer);
933 return pointer;
934}
935/*
937 * See http://msdn2.microsoft.com/en-us/library/17w5ykft(vs.71).aspx
938 * (Parsing C++ Command-Line Arguments)
939 */
940static const char *quote_arg(const char *arg)
941{
942 /* count chars to quote */
943 int len = 0, n = 0;
944 int force_quotes = 0;
945 char *q, *d;
946 const char *p = arg;
947 if (!*p) force_quotes = 1;
948 while (*p) {
949 if (isspace(*p) || *p == '*' || *p == '?' || *p == '{' || *p == '\'')
950 force_quotes = 1;
951 else if (*p == '"')
952 n++;
953 else if (*p == '\\') {
954 int count = 0;
955 while (*p == '\\') {
956 count++;
957 p++;
958 len++;
959 }
960 if (*p == '"')
961 n += count*2 + 1;
962 continue;
963 }
964 len++;
965 p++;
966 }
967 if (!force_quotes && n == 0)
968 return arg;
969 /* insert \ where necessary */
971 d = q = xmalloc(st_add3(len, n, 3));
972 *d++ = '"';
973 while (*arg) {
974 if (*arg == '"')
975 *d++ = '\\';
976 else if (*arg == '\\') {
977 int count = 0;
978 while (*arg == '\\') {
979 count++;
980 *d++ = *arg++;
981 }
982 if (*arg == '"') {
983 while (count-- > 0)
984 *d++ = '\\';
985 *d++ = '\\';
986 }
987 }
988 *d++ = *arg++;
989 }
990 *d++ = '"';
991 *d++ = 0;
992 return q;
993}
994static const char *parse_interpreter(const char *cmd)
996{
997 static char buf[100];
998 char *p, *opt;
999 int n, fd;
1000 /* don't even try a .exe */
1002 n = strlen(cmd);
1003 if (n >= 4 && !strcasecmp(cmd+n-4, ".exe"))
1004 return NULL;
1005 fd = open(cmd, O_RDONLY);
1007 if (fd < 0)
1008 return NULL;
1009 n = read(fd, buf, sizeof(buf)-1);
1010 close(fd);
1011 if (n < 4) /* at least '#!/x' and not error */
1012 return NULL;
1013 if (buf[0] != '#' || buf[1] != '!')
1015 return NULL;
1016 buf[n] = '\0';
1017 p = buf + strcspn(buf, "\r\n");
1018 if (!*p)
1019 return NULL;
1020 *p = '\0';
1022 if (!(p = strrchr(buf+2, '/')) && !(p = strrchr(buf+2, '\\')))
1023 return NULL;
1024 /* strip options */
1025 if ((opt = strchr(p+1, ' ')))
1026 *opt = '\0';
1027 return p+1;
1028}
1029/*
1031 * exe_only means that we only want to detect .exe files, but not scripts
1032 * (which do not have an extension)
1033 */
1034static char *lookup_prog(const char *dir, int dirlen, const char *cmd,
1035 int isexe, int exe_only)
1036{
1037 char path[MAX_PATH];
1038 snprintf(path, sizeof(path), "%.*s\\%s.exe", dirlen, dir, cmd);
1039 if (!isexe && access(path, F_OK) == 0)
1041 return xstrdup(path);
1042 path[strlen(path)-4] = '\0';
1043 if ((!exe_only || isexe) && access(path, F_OK) == 0)
1044 if (!(GetFileAttributes(path) & FILE_ATTRIBUTE_DIRECTORY))
1045 return xstrdup(path);
1046 return NULL;
1047}
1048/*
1050 * Determines the absolute path of cmd using the split path in path.
1051 * If cmd contains a slash or backslash, no lookup is performed.
1052 */
1053static char *path_lookup(const char *cmd, int exe_only)
1054{
1055 const char *path;
1056 char *prog = NULL;
1057 int len = strlen(cmd);
1058 int isexe = len >= 4 && !strcasecmp(cmd+len-4, ".exe");
1059 if (strchr(cmd, '/') || strchr(cmd, '\\'))
1061 return xstrdup(cmd);
1062 path = mingw_getenv("PATH");
1064 if (!path)
1065 return NULL;
1066 while (!prog) {
1068 const char *sep = strchrnul(path, ';');
1069 int dirlen = sep - path;
1070 if (dirlen)
1071 prog = lookup_prog(path, dirlen, cmd, isexe, exe_only);
1072 if (!*sep)
1073 break;
1074 path = sep + 1;
1075 }
1076 return prog;
1078}
1079static int do_putenv(char **env, const char *name, int size, int free_old);
1081/* used number of elements of environ array, including terminating NULL */
1083static int environ_size = 0;
1084/* allocated size of environ array, in bytes */
1085static int environ_alloc = 0;
1086/*
1088 * Create environment block suitable for CreateProcess. Merges current
1089 * process environment and the supplied environment changes.
1090 */
1091static wchar_t *make_environment_block(char **deltaenv)
1092{
1093 wchar_t *wenvblk = NULL;
1094 char **tmpenv;
1095 int i = 0, size = environ_size, wenvsz = 0, wenvpos = 0;
1096 while (deltaenv && deltaenv[i])
1098 i++;
1099 /* copy the environment, leaving space for changes */
1101 ALLOC_ARRAY(tmpenv, size + i);
1102 memcpy(tmpenv, environ, size * sizeof(char*));
1103 /* merge supplied environment changes into the temporary environment */
1105 for (i = 0; deltaenv && deltaenv[i]; i++)
1106 size = do_putenv(tmpenv, deltaenv[i], size, 0);
1107 /* create environment block from temporary environment */
1109 for (i = 0; tmpenv[i]; i++) {
1110 size = 2 * strlen(tmpenv[i]) + 2; /* +2 for final \0 */
1111 ALLOC_GROW(wenvblk, (wenvpos + size) * sizeof(wchar_t), wenvsz);
1112 wenvpos += xutftowcs(&wenvblk[wenvpos], tmpenv[i], size) + 1;
1113 }
1114 /* add final \0 terminator */
1115 wenvblk[wenvpos] = 0;
1116 free(tmpenv);
1117 return wenvblk;
1118}
1119struct pinfo_t {
1121 struct pinfo_t *next;
1122 pid_t pid;
1123 HANDLE proc;
1124};
1125static struct pinfo_t *pinfo = NULL;
1126CRITICAL_SECTION pinfo_cs;
1127static pid_t mingw_spawnve_fd(const char *cmd, const char **argv, char **deltaenv,
1129 const char *dir,
1130 int prepend_cmd, int fhin, int fhout, int fherr)
1131{
1132 STARTUPINFOW si;
1133 PROCESS_INFORMATION pi;
1134 struct strbuf args;
1135 wchar_t wcmd[MAX_PATH], wdir[MAX_PATH], *wargs, *wenvblk = NULL;
1136 unsigned flags = CREATE_UNICODE_ENVIRONMENT;
1137 BOOL ret;
1138 /* Determine whether or not we are associated to a console */
1140 HANDLE cons = CreateFile("CONOUT$", GENERIC_WRITE,
1141 FILE_SHARE_WRITE, NULL, OPEN_EXISTING,
1142 FILE_ATTRIBUTE_NORMAL, NULL);
1143 if (cons == INVALID_HANDLE_VALUE) {
1144 /* There is no console associated with this process.
1145 * Since the child is a console process, Windows
1146 * would normally create a console window. But
1147 * since we'll be redirecting std streams, we do
1148 * not need the console.
1149 * It is necessary to use DETACHED_PROCESS
1150 * instead of CREATE_NO_WINDOW to make ssh
1151 * recognize that it has no console.
1152 */
1153 flags |= DETACHED_PROCESS;
1154 } else {
1155 /* There is already a console. If we specified
1156 * DETACHED_PROCESS here, too, Windows would
1157 * disassociate the child from the console.
1158 * The same is true for CREATE_NO_WINDOW.
1159 * Go figure!
1160 */
1161 CloseHandle(cons);
1162 }
1163 memset(&si, 0, sizeof(si));
1164 si.cb = sizeof(si);
1165 si.dwFlags = STARTF_USESTDHANDLES;
1166 si.hStdInput = winansi_get_osfhandle(fhin);
1167 si.hStdOutput = winansi_get_osfhandle(fhout);
1168 si.hStdError = winansi_get_osfhandle(fherr);
1169 if (xutftowcs_path(wcmd, cmd) < 0)
1171 return -1;
1172 if (dir && xutftowcs_path(wdir, dir) < 0)
1173 return -1;
1174 /* concatenate argv, quoting args as we go */
1176 strbuf_init(&args, 0);
1177 if (prepend_cmd) {
1178 char *quoted = (char *)quote_arg(cmd);
1179 strbuf_addstr(&args, quoted);
1180 if (quoted != cmd)
1181 free(quoted);
1182 }
1183 for (; *argv; argv++) {
1184 char *quoted = (char *)quote_arg(*argv);
1185 if (*args.buf)
1186 strbuf_addch(&args, ' ');
1187 strbuf_addstr(&args, quoted);
1188 if (quoted != *argv)
1189 free(quoted);
1190 }
1191 ALLOC_ARRAY(wargs, st_add(st_mult(2, args.len), 1));
1193 xutftowcs(wargs, args.buf, 2 * args.len + 1);
1194 strbuf_release(&args);
1195 wenvblk = make_environment_block(deltaenv);
1197 memset(&pi, 0, sizeof(pi));
1199 ret = CreateProcessW(wcmd, wargs, NULL, NULL, TRUE, flags,
1200 wenvblk, dir ? wdir : NULL, &si, &pi);
1201 free(wenvblk);
1203 free(wargs);
1204 if (!ret) {
1206 errno = ENOENT;
1207 return -1;
1208 }
1209 CloseHandle(pi.hThread);
1210 /*
1212 * The process ID is the human-readable identifier of the process
1213 * that we want to present in log and error messages. The handle
1214 * is not useful for this purpose. But we cannot close it, either,
1215 * because it is not possible to turn a process ID into a process
1216 * handle after the process terminated.
1217 * Keep the handle in a list for waitpid.
1218 */
1219 EnterCriticalSection(&pinfo_cs);
1220 {
1221 struct pinfo_t *info = xmalloc(sizeof(struct pinfo_t));
1222 info->pid = pi.dwProcessId;
1223 info->proc = pi.hProcess;
1224 info->next = pinfo;
1225 pinfo = info;
1226 }
1227 LeaveCriticalSection(&pinfo_cs);
1228 return (pid_t)pi.dwProcessId;
1230}
1231static pid_t mingw_spawnv(const char *cmd, const char **argv, int prepend_cmd)
1233{
1234 return mingw_spawnve_fd(cmd, argv, NULL, NULL, prepend_cmd, 0, 1, 2);
1235}
1236pid_t mingw_spawnvpe(const char *cmd, const char **argv, char **deltaenv,
1238 const char *dir,
1239 int fhin, int fhout, int fherr)
1240{
1241 pid_t pid;
1242 char *prog = path_lookup(cmd, 0);
1243 if (!prog) {
1245 errno = ENOENT;
1246 pid = -1;
1247 }
1248 else {
1249 const char *interpr = parse_interpreter(prog);
1250 if (interpr) {
1252 const char *argv0 = argv[0];
1253 char *iprog = path_lookup(interpr, 1);
1254 argv[0] = prog;
1255 if (!iprog) {
1256 errno = ENOENT;
1257 pid = -1;
1258 }
1259 else {
1260 pid = mingw_spawnve_fd(iprog, argv, deltaenv, dir, 1,
1261 fhin, fhout, fherr);
1262 free(iprog);
1263 }
1264 argv[0] = argv0;
1265 }
1266 else
1267 pid = mingw_spawnve_fd(prog, argv, deltaenv, dir, 0,
1268 fhin, fhout, fherr);
1269 free(prog);
1270 }
1271 return pid;
1272}
1273static int try_shell_exec(const char *cmd, char *const *argv)
1275{
1276 const char *interpr = parse_interpreter(cmd);
1277 char *prog;
1278 int pid = 0;
1279 if (!interpr)
1281 return 0;
1282 prog = path_lookup(interpr, 1);
1283 if (prog) {
1284 int argc = 0;
1285 const char **argv2;
1286 while (argv[argc]) argc++;
1287 ALLOC_ARRAY(argv2, argc + 1);
1288 argv2[0] = (char *)cmd; /* full path to the script file */
1289 memcpy(&argv2[1], &argv[1], sizeof(*argv) * argc);
1290 pid = mingw_spawnv(prog, argv2, 1);
1291 if (pid >= 0) {
1292 int status;
1293 if (waitpid(pid, &status, 0) < 0)
1294 status = 255;
1295 exit(status);
1296 }
1297 pid = 1; /* indicate that we tried but failed */
1298 free(prog);
1299 free(argv2);
1300 }
1301 return pid;
1302}
1303int mingw_execv(const char *cmd, char *const *argv)
1305{
1306 /* check if git_command is a shell script */
1307 if (!try_shell_exec(cmd, argv)) {
1308 int pid, status;
1309 pid = mingw_spawnv(cmd, (const char **)argv, 0);
1311 if (pid < 0)
1312 return -1;
1313 if (waitpid(pid, &status, 0) < 0)
1314 status = 255;
1315 exit(status);
1316 }
1317 return -1;
1318}
1319int mingw_execvp(const char *cmd, char *const *argv)
1321{
1322 char *prog = path_lookup(cmd, 0);
1323 if (prog) {
1325 mingw_execv(prog, argv);
1326 free(prog);
1327 } else
1328 errno = ENOENT;
1329 return -1;
1331}
1332int mingw_kill(pid_t pid, int sig)
1334{
1335 if (pid > 0 && sig == SIGTERM) {
1336 HANDLE h = OpenProcess(PROCESS_TERMINATE, FALSE, pid);
1337 if (TerminateProcess(h, -1)) {
1339 CloseHandle(h);
1340 return 0;
1341 }
1342 errno = err_win_to_posix(GetLastError());
1344 CloseHandle(h);
1345 return -1;
1346 } else if (pid > 0 && sig == 0) {
1347 HANDLE h = OpenProcess(PROCESS_QUERY_INFORMATION, FALSE, pid);
1348 if (h) {
1349 CloseHandle(h);
1350 return 0;
1351 }
1352 }
1353 errno = EINVAL;
1355 return -1;
1356}
1357/*
1359 * Compare environment entries by key (i.e. stopping at '=' or '\0').
1360 */
1361static int compareenv(const void *v1, const void *v2)
1362{
1363 const char *e1 = *(const char**)v1;
1364 const char *e2 = *(const char**)v2;
1365 for (;;) {
1367 int c1 = *e1++;
1368 int c2 = *e2++;
1369 c1 = (c1 == '=') ? 0 : tolower(c1);
1370 c2 = (c2 == '=') ? 0 : tolower(c2);
1371 if (c1 > c2)
1372 return 1;
1373 if (c1 < c2)
1374 return -1;
1375 if (c1 == 0)
1376 return 0;
1377 }
1378}
1379static int bsearchenv(char **env, const char *name, size_t size)
1381{
1382 unsigned low = 0, high = size;
1383 while (low < high) {
1384 unsigned mid = low + ((high - low) >> 1);
1385 int cmp = compareenv(&env[mid], &name);
1386 if (cmp < 0)
1387 low = mid + 1;
1388 else if (cmp > 0)
1389 high = mid;
1390 else
1391 return mid;
1392 }
1393 return ~low; /* not found, return 1's complement of insert position */
1394}
1395/*
1397 * If name contains '=', then sets the variable, otherwise it unsets it
1398 * Size includes the terminating NULL. Env must have room for size + 1 entries
1399 * (in case of insert). Returns the new size. Optionally frees removed entries.
1400 */
1401static int do_putenv(char **env, const char *name, int size, int free_old)
1402{
1403 int i = bsearchenv(env, name, size - 1);
1404 /* optionally free removed / replaced entry */
1406 if (i >= 0 && free_old)
1407 free(env[i]);
1408 if (strchr(name, '=')) {
1410 /* if new value ('key=value') is specified, insert or replace entry */
1411 if (i < 0) {
1412 i = ~i;
1413 memmove(&env[i + 1], &env[i], (size - i) * sizeof(char*));
1414 size++;
1415 }
1416 env[i] = (char*) name;
1417 } else if (i >= 0) {
1418 /* otherwise ('key') remove existing entry */
1419 size--;
1420 memmove(&env[i], &env[i + 1], (size - i) * sizeof(char*));
1421 }
1422 return size;
1423}
1424char *mingw_getenv(const char *name)
1426{
1427 char *value;
1428 int pos = bsearchenv(environ, name, environ_size - 1);
1429 if (pos < 0)
1430 return NULL;
1431 value = strchr(environ[pos], '=');
1432 return value ? &value[1] : NULL;
1433}
1434int mingw_putenv(const char *namevalue)
1436{
1437 ALLOC_GROW(environ, (environ_size + 1) * sizeof(char*), environ_alloc);
1438 environ_size = do_putenv(environ, namevalue, environ_size, 1);
1439 return 0;
1440}
1441/*
1443 * Note, this isn't a complete replacement for getaddrinfo. It assumes
1444 * that service contains a numerical port, or that it is null. It
1445 * does a simple search using gethostbyname, and returns one IPv4 host
1446 * if one was found.
1447 */
1448static int WSAAPI getaddrinfo_stub(const char *node, const char *service,
1449 const struct addrinfo *hints,
1450 struct addrinfo **res)
1451{
1452 struct hostent *h = NULL;
1453 struct addrinfo *ai;
1454 struct sockaddr_in *sin;
1455 if (node) {
1457 h = gethostbyname(node);
1458 if (!h)
1459 return WSAGetLastError();
1460 }
1461 ai = xmalloc(sizeof(struct addrinfo));
1463 *res = ai;
1464 ai->ai_flags = 0;
1465 ai->ai_family = AF_INET;
1466 ai->ai_socktype = hints ? hints->ai_socktype : 0;
1467 switch (ai->ai_socktype) {
1468 case SOCK_STREAM:
1469 ai->ai_protocol = IPPROTO_TCP;
1470 break;
1471 case SOCK_DGRAM:
1472 ai->ai_protocol = IPPROTO_UDP;
1473 break;
1474 default:
1475 ai->ai_protocol = 0;
1476 break;
1477 }
1478 ai->ai_addrlen = sizeof(struct sockaddr_in);
1479 if (hints && (hints->ai_flags & AI_CANONNAME))
1480 ai->ai_canonname = h ? xstrdup(h->h_name) : NULL;
1481 else
1482 ai->ai_canonname = NULL;
1483 sin = xcalloc(1, ai->ai_addrlen);
1485 sin->sin_family = AF_INET;
1486 /* Note: getaddrinfo is supposed to allow service to be a string,
1487 * which should be looked up using getservbyname. This is
1488 * currently not implemented */
1489 if (service)
1490 sin->sin_port = htons(atoi(service));
1491 if (h)
1492 sin->sin_addr = *(struct in_addr *)h->h_addr;
1493 else if (hints && (hints->ai_flags & AI_PASSIVE))
1494 sin->sin_addr.s_addr = INADDR_ANY;
1495 else
1496 sin->sin_addr.s_addr = INADDR_LOOPBACK;
1497 ai->ai_addr = (struct sockaddr *)sin;
1498 ai->ai_next = NULL;
1499 return 0;
1500}
1501static void WSAAPI freeaddrinfo_stub(struct addrinfo *res)
1503{
1504 free(res->ai_canonname);
1505 free(res->ai_addr);
1506 free(res);
1507}
1508static int WSAAPI getnameinfo_stub(const struct sockaddr *sa, socklen_t salen,
1510 char *host, DWORD hostlen,
1511 char *serv, DWORD servlen, int flags)
1512{
1513 const struct sockaddr_in *sin = (const struct sockaddr_in *)sa;
1514 if (sa->sa_family != AF_INET)
1515 return EAI_FAMILY;
1516 if (!host && !serv)
1517 return EAI_NONAME;
1518 if (host && hostlen > 0) {
1520 struct hostent *ent = NULL;
1521 if (!(flags & NI_NUMERICHOST))
1522 ent = gethostbyaddr((const char *)&sin->sin_addr,
1523 sizeof(sin->sin_addr), AF_INET);
1524 if (ent)
1526 snprintf(host, hostlen, "%s", ent->h_name);
1527 else if (flags & NI_NAMEREQD)
1528 return EAI_NONAME;
1529 else
1530 snprintf(host, hostlen, "%s", inet_ntoa(sin->sin_addr));
1531 }
1532 if (serv && servlen > 0) {
1534 struct servent *ent = NULL;
1535 if (!(flags & NI_NUMERICSERV))
1536 ent = getservbyport(sin->sin_port,
1537 flags & NI_DGRAM ? "udp" : "tcp");
1538 if (ent)
1540 snprintf(serv, servlen, "%s", ent->s_name);
1541 else
1542 snprintf(serv, servlen, "%d", ntohs(sin->sin_port));
1543 }
1544 return 0;
1546}
1547static HMODULE ipv6_dll = NULL;
1549static void (WSAAPI *ipv6_freeaddrinfo)(struct addrinfo *res);
1550static int (WSAAPI *ipv6_getaddrinfo)(const char *node, const char *service,
1551 const struct addrinfo *hints,
1552 struct addrinfo **res);
1553static int (WSAAPI *ipv6_getnameinfo)(const struct sockaddr *sa, socklen_t salen,
1554 char *host, DWORD hostlen,
1555 char *serv, DWORD servlen, int flags);
1556/*
1557 * gai_strerror is an inline function in the ws2tcpip.h header, so we
1558 * don't need to try to load that one dynamically.
1559 */
1560static void socket_cleanup(void)
1562{
1563 WSACleanup();
1564 if (ipv6_dll)
1565 FreeLibrary(ipv6_dll);
1566 ipv6_dll = NULL;
1567 ipv6_freeaddrinfo = freeaddrinfo_stub;
1568 ipv6_getaddrinfo = getaddrinfo_stub;
1569 ipv6_getnameinfo = getnameinfo_stub;
1570}
1571static void ensure_socket_initialization(void)
1573{
1574 WSADATA wsa;
1575 static int initialized = 0;
1576 const char *libraries[] = { "ws2_32.dll", "wship6.dll", NULL };
1577 const char **name;
1578 if (initialized)
1580 return;
1581 if (WSAStartup(MAKEWORD(2,2), &wsa))
1583 die("unable to initialize winsock subsystem, error %d",
1584 WSAGetLastError());
1585 for (name = libraries; *name; name++) {
1587 ipv6_dll = LoadLibrary(*name);
1588 if (!ipv6_dll)
1589 continue;
1590 ipv6_freeaddrinfo = (void (WSAAPI *)(struct addrinfo *))
1592 GetProcAddress(ipv6_dll, "freeaddrinfo");
1593 ipv6_getaddrinfo = (int (WSAAPI *)(const char *, const char *,
1594 const struct addrinfo *,
1595 struct addrinfo **))
1596 GetProcAddress(ipv6_dll, "getaddrinfo");
1597 ipv6_getnameinfo = (int (WSAAPI *)(const struct sockaddr *,
1598 socklen_t, char *, DWORD,
1599 char *, DWORD, int))
1600 GetProcAddress(ipv6_dll, "getnameinfo");
1601 if (!ipv6_freeaddrinfo || !ipv6_getaddrinfo || !ipv6_getnameinfo) {
1602 FreeLibrary(ipv6_dll);
1603 ipv6_dll = NULL;
1604 } else
1605 break;
1606 }
1607 if (!ipv6_freeaddrinfo || !ipv6_getaddrinfo || !ipv6_getnameinfo) {
1608 ipv6_freeaddrinfo = freeaddrinfo_stub;
1609 ipv6_getaddrinfo = getaddrinfo_stub;
1610 ipv6_getnameinfo = getnameinfo_stub;
1611 }
1612 atexit(socket_cleanup);
1614 initialized = 1;
1615}
1616#undef gethostname
1618int mingw_gethostname(char *name, int namelen)
1619{
1620 ensure_socket_initialization();
1621 return gethostname(name, namelen);
1622}
1623#undef gethostbyname
1625struct hostent *mingw_gethostbyname(const char *host)
1626{
1627 ensure_socket_initialization();
1628 return gethostbyname(host);
1629}
1630void mingw_freeaddrinfo(struct addrinfo *res)
1632{
1633 ipv6_freeaddrinfo(res);
1634}
1635int mingw_getaddrinfo(const char *node, const char *service,
1637 const struct addrinfo *hints, struct addrinfo **res)
1638{
1639 ensure_socket_initialization();
1640 return ipv6_getaddrinfo(node, service, hints, res);
1641}
1642int mingw_getnameinfo(const struct sockaddr *sa, socklen_t salen,
1644 char *host, DWORD hostlen, char *serv, DWORD servlen,
1645 int flags)
1646{
1647 ensure_socket_initialization();
1648 return ipv6_getnameinfo(sa, salen, host, hostlen, serv, servlen, flags);
1649}
1650int mingw_socket(int domain, int type, int protocol)
1652{
1653 int sockfd;
1654 SOCKET s;
1655 ensure_socket_initialization();
1657 s = WSASocket(domain, type, protocol, NULL, 0, 0);
1658 if (s == INVALID_SOCKET) {
1659 /*
1660 * WSAGetLastError() values are regular BSD error codes
1661 * biased by WSABASEERR.
1662 * However, strerror() does not know about networking
1663 * specific errors, which are values beginning at 38 or so.
1664 * Therefore, we choose to leave the biased error code
1665 * in errno so that _if_ someone looks up the code somewhere,
1666 * then it is at least the number that are usually listed.
1667 */
1668 errno = WSAGetLastError();
1669 return -1;
1670 }
1671 /* convert into a file descriptor */
1672 if ((sockfd = _open_osfhandle(s, O_RDWR|O_BINARY)) < 0) {
1673 closesocket(s);
1674 return error("unable to make a socket file descriptor: %s",
1675 strerror(errno));
1676 }
1677 return sockfd;
1678}
1679#undef connect
1681int mingw_connect(int sockfd, struct sockaddr *sa, size_t sz)
1682{
1683 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
1684 return connect(s, sa, sz);
1685}
1686#undef bind
1688int mingw_bind(int sockfd, struct sockaddr *sa, size_t sz)
1689{
1690 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
1691 return bind(s, sa, sz);
1692}
1693#undef setsockopt
1695int mingw_setsockopt(int sockfd, int lvl, int optname, void *optval, int optlen)
1696{
1697 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
1698 return setsockopt(s, lvl, optname, (const char*)optval, optlen);
1699}
1700#undef shutdown
1702int mingw_shutdown(int sockfd, int how)
1703{
1704 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
1705 return shutdown(s, how);
1706}
1707#undef listen
1709int mingw_listen(int sockfd, int backlog)
1710{
1711 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
1712 return listen(s, backlog);
1713}
1714#undef accept
1716int mingw_accept(int sockfd1, struct sockaddr *sa, socklen_t *sz)
1717{
1718 int sockfd2;
1719 SOCKET s1 = (SOCKET)_get_osfhandle(sockfd1);
1721 SOCKET s2 = accept(s1, sa, sz);
1722 /* convert into a file descriptor */
1724 if ((sockfd2 = _open_osfhandle(s2, O_RDWR|O_BINARY)) < 0) {
1725 int err = errno;
1726 closesocket(s2);
1727 return error("unable to make a socket file descriptor: %s",
1728 strerror(err));
1729 }
1730 return sockfd2;
1731}
1732#undef rename
1734int mingw_rename(const char *pold, const char *pnew)
1735{
1736 DWORD attrs, gle;
1737 int tries = 0;
1738 wchar_t wpold[MAX_PATH], wpnew[MAX_PATH];
1739 if (xutftowcs_path(wpold, pold) < 0 || xutftowcs_path(wpnew, pnew) < 0)
1740 return -1;
1741 /*
1743 * Try native rename() first to get errno right.
1744 * It is based on MoveFile(), which cannot overwrite existing files.
1745 */
1746 if (!_wrename(wpold, wpnew))
1747 return 0;
1748 if (errno != EEXIST)
1749 return -1;
1750repeat:
1751 if (MoveFileExW(wpold, wpnew, MOVEFILE_REPLACE_EXISTING))
1752 return 0;
1753 /* TODO: translate more errors */
1754 gle = GetLastError();
1755 if (gle == ERROR_ACCESS_DENIED &&
1756 (attrs = GetFileAttributesW(wpnew)) != INVALID_FILE_ATTRIBUTES) {
1757 if (attrs & FILE_ATTRIBUTE_DIRECTORY) {
1758 DWORD attrsold = GetFileAttributesW(wpold);
1759 if (attrsold == INVALID_FILE_ATTRIBUTES ||
1760 !(attrsold & FILE_ATTRIBUTE_DIRECTORY))
1761 errno = EISDIR;
1762 else if (!_wrmdir(wpnew))
1763 goto repeat;
1764 return -1;
1765 }
1766 if ((attrs & FILE_ATTRIBUTE_READONLY) &&
1767 SetFileAttributesW(wpnew, attrs & ~FILE_ATTRIBUTE_READONLY)) {
1768 if (MoveFileExW(wpold, wpnew, MOVEFILE_REPLACE_EXISTING))
1769 return 0;
1770 gle = GetLastError();
1771 /* revert file attributes on failure */
1772 SetFileAttributesW(wpnew, attrs);
1773 }
1774 }
1775 if (tries < ARRAY_SIZE(delay) && gle == ERROR_ACCESS_DENIED) {
1776 /*
1777 * We assume that some other process had the source or
1778 * destination file open at the wrong moment and retry.
1779 * In order to give the other process a higher chance to
1780 * complete its operation, we give up our time slice now.
1781 * If we have to retry again, we do sleep a bit.
1782 */
1783 Sleep(delay[tries]);
1784 tries++;
1785 goto repeat;
1786 }
1787 if (gle == ERROR_ACCESS_DENIED &&
1788 ask_yes_no_if_possible("Rename from '%s' to '%s' failed. "
1789 "Should I try again?", pold, pnew))
1790 goto repeat;
1791 errno = EACCES;
1793 return -1;
1794}
1795/*
1797 * Note that this doesn't return the actual pagesize, but
1798 * the allocation granularity. If future Windows specific git code
1799 * needs the real getpagesize function, we need to find another solution.
1800 */
1801int mingw_getpagesize(void)
1802{
1803 SYSTEM_INFO si;
1804 GetSystemInfo(&si);
1805 return si.dwAllocationGranularity;
1806}
1807struct passwd *getpwuid(int uid)
1809{
1810 static char user_name[100];
1811 static struct passwd p;
1812 DWORD len = sizeof(user_name);
1814 if (!GetUserName(user_name, &len))
1815 return NULL;
1816 p.pw_name = user_name;
1817 p.pw_gecos = "unknown";
1818 p.pw_dir = NULL;
1819 return &p;
1820}
1821static HANDLE timer_event;
1823static HANDLE timer_thread;
1824static int timer_interval;
1825static int one_shot;
1826static sig_handler_t timer_fn = SIG_DFL, sigint_fn = SIG_DFL;
1827/* The timer works like this:
1829 * The thread, ticktack(), is a trivial routine that most of the time
1830 * only waits to receive the signal to terminate. The main thread tells
1831 * the thread to terminate by setting the timer_event to the signalled
1832 * state.
1833 * But ticktack() interrupts the wait state after the timer's interval
1834 * length to call the signal handler.
1835 */
1836static unsigned __stdcall ticktack(void *dummy)
1838{
1839 while (WaitForSingleObject(timer_event, timer_interval) == WAIT_TIMEOUT) {
1840 mingw_raise(SIGALRM);
1841 if (one_shot)
1842 break;
1843 }
1844 return 0;
1845}
1846static int start_timer_thread(void)
1848{
1849 timer_event = CreateEvent(NULL, FALSE, FALSE, NULL);
1850 if (timer_event) {
1851 timer_thread = (HANDLE) _beginthreadex(NULL, 0, ticktack, NULL, 0, NULL);
1852 if (!timer_thread )
1853 return errno = ENOMEM,
1854 error("cannot start timer thread");
1855 } else
1856 return errno = ENOMEM,
1857 error("cannot allocate resources for timer");
1858 return 0;
1859}
1860static void stop_timer_thread(void)
1862{
1863 if (timer_event)
1864 SetEvent(timer_event); /* tell thread to terminate */
1865 if (timer_thread) {
1866 int rc = WaitForSingleObject(timer_thread, 1000);
1867 if (rc == WAIT_TIMEOUT)
1868 error("timer thread did not terminate timely");
1869 else if (rc != WAIT_OBJECT_0)
1870 error("waiting for timer thread failed: %lu",
1871 GetLastError());
1872 CloseHandle(timer_thread);
1873 }
1874 if (timer_event)
1875 CloseHandle(timer_event);
1876 timer_event = NULL;
1877 timer_thread = NULL;
1878}
1879static inline int is_timeval_eq(const struct timeval *i1, const struct timeval *i2)
1881{
1882 return i1->tv_sec == i2->tv_sec && i1->tv_usec == i2->tv_usec;
1883}
1884int setitimer(int type, struct itimerval *in, struct itimerval *out)
1886{
1887 static const struct timeval zero;
1888 static int atexit_done;
1889 if (out != NULL)
1891 return errno = EINVAL,
1892 error("setitimer param 3 != NULL not implemented");
1893 if (!is_timeval_eq(&in->it_interval, &zero) &&
1894 !is_timeval_eq(&in->it_interval, &in->it_value))
1895 return errno = EINVAL,
1896 error("setitimer: it_interval must be zero or eq it_value");
1897 if (timer_thread)
1899 stop_timer_thread();
1900 if (is_timeval_eq(&in->it_value, &zero) &&
1902 is_timeval_eq(&in->it_interval, &zero))
1903 return 0;
1904 timer_interval = in->it_value.tv_sec * 1000 + in->it_value.tv_usec / 1000;
1906 one_shot = is_timeval_eq(&in->it_interval, &zero);
1907 if (!atexit_done) {
1908 atexit(stop_timer_thread);
1909 atexit_done = 1;
1910 }
1911 return start_timer_thread();
1912}
1913int sigaction(int sig, struct sigaction *in, struct sigaction *out)
1915{
1916 if (sig != SIGALRM)
1917 return errno = EINVAL,
1918 error("sigaction only implemented for SIGALRM");
1919 if (out != NULL)
1920 return errno = EINVAL,
1921 error("sigaction: param 3 != NULL not implemented");
1922 timer_fn = in->sa_handler;
1924 return 0;
1925}
1926#undef signal
1928sig_handler_t mingw_signal(int sig, sig_handler_t handler)
1929{
1930 sig_handler_t old;
1931 switch (sig) {
1933 case SIGALRM:
1934 old = timer_fn;
1935 timer_fn = handler;
1936 break;
1937 case SIGINT:
1939 old = sigint_fn;
1940 sigint_fn = handler;
1941 break;
1942 default:
1944 return signal(sig, handler);
1945 }
1946 return old;
1948}
1949#undef raise
1951int mingw_raise(int sig)
1952{
1953 switch (sig) {
1954 case SIGALRM:
1955 if (timer_fn == SIG_DFL) {
1956 if (isatty(STDERR_FILENO))
1957 fputs("Alarm clock\n", stderr);
1958 exit(128 + SIGALRM);
1959 } else if (timer_fn != SIG_IGN)
1960 timer_fn(SIGALRM);
1961 return 0;
1962 case SIGINT:
1964 if (sigint_fn == SIG_DFL)
1965 exit(128 + SIGINT);
1966 else if (sigint_fn != SIG_IGN)
1967 sigint_fn(SIGINT);
1968 return 0;
1969 default:
1971 return raise(sig);
1972 }
1973}
1974int link(const char *oldpath, const char *newpath)
1976{
1977 typedef BOOL (WINAPI *T)(LPCWSTR, LPCWSTR, LPSECURITY_ATTRIBUTES);
1978 static T create_hard_link = NULL;
1979 wchar_t woldpath[MAX_PATH], wnewpath[MAX_PATH];
1980 if (xutftowcs_path(woldpath, oldpath) < 0 ||
1981 xutftowcs_path(wnewpath, newpath) < 0)
1982 return -1;
1983 if (!create_hard_link) {
1985 create_hard_link = (T) GetProcAddress(
1986 GetModuleHandle("kernel32.dll"), "CreateHardLinkW");
1987 if (!create_hard_link)
1988 create_hard_link = (T)-1;
1989 }
1990 if (create_hard_link == (T)-1) {
1991 errno = ENOSYS;
1992 return -1;
1993 }
1994 if (!create_hard_link(wnewpath, woldpath, NULL)) {
1995 errno = err_win_to_posix(GetLastError());
1996 return -1;
1997 }
1998 return 0;
1999}
2000pid_t waitpid(pid_t pid, int *status, int options)
2002{
2003 HANDLE h = OpenProcess(SYNCHRONIZE | PROCESS_QUERY_INFORMATION,
2004 FALSE, pid);
2005 if (!h) {
2006 errno = ECHILD;
2007 return -1;
2008 }
2009 if (pid > 0 && options & WNOHANG) {
2011 if (WAIT_OBJECT_0 != WaitForSingleObject(h, 0)) {
2012 CloseHandle(h);
2013 return 0;
2014 }
2015 options &= ~WNOHANG;
2016 }
2017 if (options == 0) {
2019 struct pinfo_t **ppinfo;
2020 if (WaitForSingleObject(h, INFINITE) != WAIT_OBJECT_0) {
2021 CloseHandle(h);
2022 return 0;
2023 }
2024 if (status)
2026 GetExitCodeProcess(h, (LPDWORD)status);
2027 EnterCriticalSection(&pinfo_cs);
2029 ppinfo = &pinfo;
2031 while (*ppinfo) {
2032 struct pinfo_t *info = *ppinfo;
2033 if (info->pid == pid) {
2034 CloseHandle(info->proc);
2035 *ppinfo = info->next;
2036 free(info);
2037 break;
2038 }
2039 ppinfo = &info->next;
2040 }
2041 LeaveCriticalSection(&pinfo_cs);
2043 CloseHandle(h);
2045 return pid;
2046 }
2047 CloseHandle(h);
2048 errno = EINVAL;
2050 return -1;
2051}
2052int mingw_skip_dos_drive_prefix(char **path)
2054{
2055 int ret = has_dos_drive_prefix(*path);
2056 *path += ret;
2057 return ret;
2058}
2059int mingw_offset_1st_component(const char *path)
2061{
2062 char *pos = (char *)path;
2063 /* unc paths */
2065 if (!skip_dos_drive_prefix(&pos) &&
2066 is_dir_sep(pos[0]) && is_dir_sep(pos[1])) {
2067 /* skip server name */
2068 pos = strpbrk(pos + 2, "\\/");
2069 if (!pos)
2070 return 0; /* Error: malformed unc path */
2071 do {
2073 pos++;
2074 } while (*pos && !is_dir_sep(*pos));
2075 }
2076 return pos + is_dir_sep(*pos) - path;
2078}
2079int xutftowcsn(wchar_t *wcs, const char *utfs, size_t wcslen, int utflen)
2081{
2082 int upos = 0, wpos = 0;
2083 const unsigned char *utf = (const unsigned char*) utfs;
2084 if (!utf || !wcs || wcslen < 1) {
2085 errno = EINVAL;
2086 return -1;
2087 }
2088 /* reserve space for \0 */
2089 wcslen--;
2090 if (utflen < 0)
2091 utflen = INT_MAX;
2092 while (upos < utflen) {
2094 int c = utf[upos++] & 0xff;
2095 if (utflen == INT_MAX && c == 0)
2096 break;
2097 if (wpos >= wcslen) {
2099 wcs[wpos] = 0;
2100 errno = ERANGE;
2101 return -1;
2102 }
2103 if (c < 0x80) {
2105 /* ASCII */
2106 wcs[wpos++] = c;
2107 } else if (c >= 0xc2 && c < 0xe0 && upos < utflen &&
2108 (utf[upos] & 0xc0) == 0x80) {
2109 /* 2-byte utf-8 */
2110 c = ((c & 0x1f) << 6);
2111 c |= (utf[upos++] & 0x3f);
2112 wcs[wpos++] = c;
2113 } else if (c >= 0xe0 && c < 0xf0 && upos + 1 < utflen &&
2114 !(c == 0xe0 && utf[upos] < 0xa0) && /* over-long encoding */
2115 (utf[upos] & 0xc0) == 0x80 &&
2116 (utf[upos + 1] & 0xc0) == 0x80) {
2117 /* 3-byte utf-8 */
2118 c = ((c & 0x0f) << 12);
2119 c |= ((utf[upos++] & 0x3f) << 6);
2120 c |= (utf[upos++] & 0x3f);
2121 wcs[wpos++] = c;
2122 } else if (c >= 0xf0 && c < 0xf5 && upos + 2 < utflen &&
2123 wpos + 1 < wcslen &&
2124 !(c == 0xf0 && utf[upos] < 0x90) && /* over-long encoding */
2125 !(c == 0xf4 && utf[upos] >= 0x90) && /* > \u10ffff */
2126 (utf[upos] & 0xc0) == 0x80 &&
2127 (utf[upos + 1] & 0xc0) == 0x80 &&
2128 (utf[upos + 2] & 0xc0) == 0x80) {
2129 /* 4-byte utf-8: convert to \ud8xx \udcxx surrogate pair */
2130 c = ((c & 0x07) << 18);
2131 c |= ((utf[upos++] & 0x3f) << 12);
2132 c |= ((utf[upos++] & 0x3f) << 6);
2133 c |= (utf[upos++] & 0x3f);
2134 c -= 0x10000;
2135 wcs[wpos++] = 0xd800 | (c >> 10);
2136 wcs[wpos++] = 0xdc00 | (c & 0x3ff);
2137 } else if (c >= 0xa0) {
2138 /* invalid utf-8 byte, printable unicode char: convert 1:1 */
2139 wcs[wpos++] = c;
2140 } else {
2141 /* invalid utf-8 byte, non-printable unicode: convert to hex */
2142 static const char *hex = "0123456789abcdef";
2143 wcs[wpos++] = hex[c >> 4];
2144 if (wpos < wcslen)
2145 wcs[wpos++] = hex[c & 0x0f];
2146 }
2147 }
2148 wcs[wpos] = 0;
2149 return wpos;
2150}
2151int xwcstoutf(char *utf, const wchar_t *wcs, size_t utflen)
2153{
2154 if (!wcs || !utf || utflen < 1) {
2155 errno = EINVAL;
2156 return -1;
2157 }
2158 utflen = WideCharToMultiByte(CP_UTF8, 0, wcs, -1, utf, utflen, NULL, NULL);
2159 if (utflen)
2160 return utflen - 1;
2161 errno = ERANGE;
2162 return -1;
2163}
2164static void setup_windows_environment(void)
2166{
2167 char *tmp = getenv("TMPDIR");
2168 /* on Windows it is TMP and TEMP */
2170 if (!tmp) {
2171 if (!(tmp = getenv("TMP")))
2172 tmp = getenv("TEMP");
2173 if (tmp) {
2174 setenv("TMPDIR", tmp, 1);
2175 tmp = getenv("TMPDIR");
2176 }
2177 }
2178 if (tmp) {
2180 /*
2181 * Convert all dir separators to forward slashes,
2182 * to help shell commands called from the Git
2183 * executable (by not mistaking the dir separators
2184 * for escape characters).
2185 */
2186 convert_slashes(tmp);
2187 }
2188 /* simulate TERM to enable auto-color (see color.c) */
2190 if (!getenv("TERM"))
2191 setenv("TERM", "cygwin", 1);
2192}
2193/*
2195 * Disable MSVCRT command line wildcard expansion (__getmainargs called from
2196 * mingw startup code, see init.c in mingw runtime).
2197 */
2198int _CRT_glob = 0;
2199typedef struct {
2201 int newmode;
2202} _startupinfo;
2203extern int __wgetmainargs(int *argc, wchar_t ***argv, wchar_t ***env, int glob,
2205 _startupinfo *si);
2206static NORETURN void die_startup(void)
2208{
2209 fputs("fatal: not enough memory for initialization", stderr);
2210 exit(128);
2211}
2212static void *malloc_startup(size_t size)
2214{
2215 void *result = malloc(size);
2216 if (!result)
2217 die_startup();
2218 return result;
2219}
2220static char *wcstoutfdup_startup(char *buffer, const wchar_t *wcs, size_t len)
2222{
2223 len = xwcstoutf(buffer, wcs, len) + 1;
2224 return memcpy(malloc_startup(len), buffer, len);
2225}
2226static void maybe_redirect_std_handle(const wchar_t *key, DWORD std_id, int fd,
2228 DWORD desired_access, DWORD flags)
2229{
2230 DWORD create_flag = fd ? OPEN_ALWAYS : OPEN_EXISTING;
2231 wchar_t buf[MAX_PATH];
2232 DWORD max = ARRAY_SIZE(buf);
2233 HANDLE handle;
2234 DWORD ret = GetEnvironmentVariableW(key, buf, max);
2235 if (!ret || ret >= max)
2237 return;
2238 /* make sure this does not leak into child processes */
2240 SetEnvironmentVariableW(key, NULL);
2241 if (!wcscmp(buf, L"off")) {
2242 close(fd);
2243 handle = GetStdHandle(std_id);
2244 if (handle != INVALID_HANDLE_VALUE)
2245 CloseHandle(handle);
2246 return;
2247 }
2248 if (std_id == STD_ERROR_HANDLE && !wcscmp(buf, L"2>&1")) {
2249 handle = GetStdHandle(STD_OUTPUT_HANDLE);
2250 if (handle == INVALID_HANDLE_VALUE) {
2251 close(fd);
2252 handle = GetStdHandle(std_id);
2253 if (handle != INVALID_HANDLE_VALUE)
2254 CloseHandle(handle);
2255 } else {
2256 int new_fd = _open_osfhandle((intptr_t)handle, O_BINARY);
2257 SetStdHandle(std_id, handle);
2258 dup2(new_fd, fd);
2259 /* do *not* close the new_fd: that would close stdout */
2260 }
2261 return;
2262 }
2263 handle = CreateFileW(buf, desired_access, 0, NULL, create_flag,
2264 flags, NULL);
2265 if (handle != INVALID_HANDLE_VALUE) {
2266 int new_fd = _open_osfhandle((intptr_t)handle, O_BINARY);
2267 SetStdHandle(std_id, handle);
2268 dup2(new_fd, fd);
2269 close(new_fd);
2270 }
2271}
2272static void maybe_redirect_std_handles(void)
2274{
2275 maybe_redirect_std_handle(L"GIT_REDIRECT_STDIN", STD_INPUT_HANDLE, 0,
2276 GENERIC_READ, FILE_ATTRIBUTE_NORMAL);
2277 maybe_redirect_std_handle(L"GIT_REDIRECT_STDOUT", STD_OUTPUT_HANDLE, 1,
2278 GENERIC_WRITE, FILE_ATTRIBUTE_NORMAL);
2279 maybe_redirect_std_handle(L"GIT_REDIRECT_STDERR", STD_ERROR_HANDLE, 2,
2280 GENERIC_WRITE, FILE_FLAG_NO_BUFFERING);
2281}
2282void mingw_startup(void)
2284{
2285 int i, maxlen, argc;
2286 char *buffer;
2287 wchar_t **wenv, **wargv;
2288 _startupinfo si;
2289 maybe_redirect_std_handles();
2291 /* get wide char arguments and environment */
2293 si.newmode = 0;
2294 if (__wgetmainargs(&argc, &wargv, &wenv, _CRT_glob, &si) < 0)
2295 die_startup();
2296 /* determine size of argv and environ conversion buffer */
2298 maxlen = wcslen(wargv[0]);
2299 for (i = 1; i < argc; i++)
2300 maxlen = max(maxlen, wcslen(wargv[i]));
2301 for (i = 0; wenv[i]; i++)
2302 maxlen = max(maxlen, wcslen(wenv[i]));
2303 /*
2305 * nedmalloc can't free CRT memory, allocate resizable environment
2306 * list. Note that xmalloc / xmemdupz etc. call getenv, so we cannot
2307 * use it while initializing the environment itself.
2308 */
2309 environ_size = i + 1;
2310 environ_alloc = alloc_nr(environ_size * sizeof(char*));
2311 environ = malloc_startup(environ_alloc);
2312 /* allocate buffer (wchar_t encodes to max 3 UTF-8 bytes) */
2314 maxlen = 3 * maxlen + 1;
2315 buffer = malloc_startup(maxlen);
2316 /* convert command line arguments and environment to UTF-8 */
2318 for (i = 0; i < argc; i++)
2319 __argv[i] = wcstoutfdup_startup(buffer, wargv[i], maxlen);
2320 for (i = 0; wenv[i]; i++)
2321 environ[i] = wcstoutfdup_startup(buffer, wenv[i], maxlen);
2322 environ[i] = NULL;
2323 free(buffer);
2324 /* sort environment for O(log n) getenv / putenv */
2326 qsort(environ, i, sizeof(char*), compareenv);
2327 /* fix Windows specific environment settings */
2329 setup_windows_environment();
2330 /* initialize critical section for waitpid pinfo_t list */
2332 InitializeCriticalSection(&pinfo_cs);
2333 /* set up default file mode and file modes for stdin/out/err */
2335 _fmode = _O_BINARY;
2336 _setmode(_fileno(stdin), _O_BINARY);
2337 _setmode(_fileno(stdout), _O_BINARY);
2338 _setmode(_fileno(stderr), _O_BINARY);
2339 /* initialize Unicode console */
2341 winansi_init();
2342}
2343int uname(struct utsname *buf)
2345{
2346 unsigned v = (unsigned)GetVersion();
2347 memset(buf, 0, sizeof(*buf));
2348 xsnprintf(buf->sysname, sizeof(buf->sysname), "Windows");
2349 xsnprintf(buf->release, sizeof(buf->release),
2350 "%u.%u", v & 0xff, (v >> 8) & 0xff);
2351 /* assuming NT variants only.. */
2352 xsnprintf(buf->version, sizeof(buf->version),
2353 "%u", (v >> 16) & 0x7fff);
2354 return 0;
2355}