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}
343static int mingw_open_append(wchar_t const *wfilename, int oflags, ...)
345{
346 HANDLE handle;
347 int fd;
348 DWORD create = (oflags & O_CREAT) ? OPEN_ALWAYS : OPEN_EXISTING;
349 /* only these flags are supported */
351 if ((oflags & ~O_CREAT) != (O_WRONLY | O_APPEND))
352 return errno = ENOSYS, -1;
353 /*
355 * FILE_SHARE_WRITE is required to permit child processes
356 * to append to the file.
357 */
358 handle = CreateFileW(wfilename, FILE_APPEND_DATA,
359 FILE_SHARE_WRITE | FILE_SHARE_READ,
360 NULL, create, FILE_ATTRIBUTE_NORMAL, NULL);
361 if (handle == INVALID_HANDLE_VALUE)
362 return errno = err_win_to_posix(GetLastError()), -1;
363 /*
364 * No O_APPEND here, because the CRT uses it only to reset the
365 * file pointer to EOF on write(); but that is not necessary
366 * for a file created with FILE_APPEND_DATA.
367 */
368 fd = _open_osfhandle((intptr_t)handle, O_BINARY);
369 if (fd < 0)
370 CloseHandle(handle);
371 return fd;
372}
373int mingw_open (const char *filename, int oflags, ...)
375{
376 typedef int (*open_fn_t)(wchar_t const *wfilename, int oflags, ...);
377 va_list args;
378 unsigned mode;
379 int fd;
380 wchar_t wfilename[MAX_PATH];
381 open_fn_t open_fn;
382 va_start(args, oflags);
384 mode = va_arg(args, int);
385 va_end(args);
386 if (filename && !strcmp(filename, "/dev/null"))
388 filename = "nul";
389 if (oflags & O_APPEND)
391 open_fn = mingw_open_append;
392 else
393 open_fn = _wopen;
394 if (xutftowcs_path(wfilename, filename) < 0)
396 return -1;
397 fd = open_fn(wfilename, oflags, mode);
398 if (fd < 0 && (oflags & O_ACCMODE) != O_RDONLY && errno == EACCES) {
400 DWORD attrs = GetFileAttributesW(wfilename);
401 if (attrs != INVALID_FILE_ATTRIBUTES && (attrs & FILE_ATTRIBUTE_DIRECTORY))
402 errno = EISDIR;
403 }
404 if ((oflags & O_CREAT) && needs_hiding(filename)) {
405 /*
406 * Internally, _wopen() uses the CreateFile() API which errors
407 * out with an ERROR_ACCESS_DENIED if CREATE_ALWAYS was
408 * specified and an already existing file's attributes do not
409 * match *exactly*. As there is no mode or flag we can set that
410 * would correspond to FILE_ATTRIBUTE_HIDDEN, let's just try
411 * again *without* the O_CREAT flag (that corresponds to the
412 * CREATE_ALWAYS flag of CreateFile()).
413 */
414 if (fd < 0 && errno == EACCES)
415 fd = open_fn(wfilename, oflags & ~O_CREAT, mode);
416 if (fd >= 0 && set_hidden_flag(wfilename, 1))
417 warning("could not mark '%s' as hidden.", filename);
418 }
419 return fd;
420}
421static BOOL WINAPI ctrl_ignore(DWORD type)
423{
424 return TRUE;
425}
426#undef fgetc
428int mingw_fgetc(FILE *stream)
429{
430 int ch;
431 if (!isatty(_fileno(stream)))
432 return fgetc(stream);
433 SetConsoleCtrlHandler(ctrl_ignore, TRUE);
435 while (1) {
436 ch = fgetc(stream);
437 if (ch != EOF || GetLastError() != ERROR_OPERATION_ABORTED)
438 break;
439 /* Ctrl+C was pressed, simulate SIGINT and retry */
441 mingw_raise(SIGINT);
442 }
443 SetConsoleCtrlHandler(ctrl_ignore, FALSE);
444 return ch;
445}
446#undef fopen
448FILE *mingw_fopen (const char *filename, const char *otype)
449{
450 int hide = needs_hiding(filename);
451 FILE *file;
452 wchar_t wfilename[MAX_PATH], wotype[4];
453 if (filename && !strcmp(filename, "/dev/null"))
454 filename = "nul";
455 if (xutftowcs_path(wfilename, filename) < 0 ||
456 xutftowcs(wotype, otype, ARRAY_SIZE(wotype)) < 0)
457 return NULL;
458 if (hide && !access(filename, F_OK) && set_hidden_flag(wfilename, 0)) {
459 error("could not unhide %s", filename);
460 return NULL;
461 }
462 file = _wfopen(wfilename, wotype);
463 if (!file && GetLastError() == ERROR_INVALID_NAME)
464 errno = ENOENT;
465 if (file && hide && set_hidden_flag(wfilename, 1))
466 warning("could not mark '%s' as hidden.", filename);
467 return file;
468}
469FILE *mingw_freopen (const char *filename, const char *otype, FILE *stream)
471{
472 int hide = needs_hiding(filename);
473 FILE *file;
474 wchar_t wfilename[MAX_PATH], wotype[4];
475 if (filename && !strcmp(filename, "/dev/null"))
476 filename = "nul";
477 if (xutftowcs_path(wfilename, filename) < 0 ||
478 xutftowcs(wotype, otype, ARRAY_SIZE(wotype)) < 0)
479 return NULL;
480 if (hide && !access(filename, F_OK) && set_hidden_flag(wfilename, 0)) {
481 error("could not unhide %s", filename);
482 return NULL;
483 }
484 file = _wfreopen(wfilename, wotype, stream);
485 if (file && hide && set_hidden_flag(wfilename, 1))
486 warning("could not mark '%s' as hidden.", filename);
487 return file;
488}
489#undef fflush
491int mingw_fflush(FILE *stream)
492{
493 int ret = fflush(stream);
494 /*
496 * write() is used behind the scenes of stdio output functions.
497 * Since git code does not check for errors after each stdio write
498 * operation, it can happen that write() is called by a later
499 * stdio function even if an earlier write() call failed. In the
500 * case of a pipe whose readable end was closed, only the first
501 * call to write() reports EPIPE on Windows. Subsequent write()
502 * calls report EINVAL. It is impossible to notice whether this
503 * fflush invocation triggered such a case, therefore, we have to
504 * catch all EINVAL errors whole-sale.
505 */
506 if (ret && errno == EINVAL)
507 errno = EPIPE;
508 return ret;
510}
511#undef write
513ssize_t mingw_write(int fd, const void *buf, size_t len)
514{
515 ssize_t result = write(fd, buf, len);
516 if (result < 0 && errno == EINVAL && buf) {
518 /* check if fd is a pipe */
519 HANDLE h = (HANDLE) _get_osfhandle(fd);
520 if (GetFileType(h) == FILE_TYPE_PIPE)
521 errno = EPIPE;
522 else
523 errno = EINVAL;
524 }
525 return result;
527}
528int mingw_access(const char *filename, int mode)
530{
531 wchar_t wfilename[MAX_PATH];
532 if (xutftowcs_path(wfilename, filename) < 0)
533 return -1;
534 /* X_OK is not supported by the MSVCRT version */
535 return _waccess(wfilename, mode & ~X_OK);
536}
537int mingw_chdir(const char *dirname)
539{
540 wchar_t wdirname[MAX_PATH];
541 if (xutftowcs_path(wdirname, dirname) < 0)
542 return -1;
543 return _wchdir(wdirname);
544}
545int mingw_chmod(const char *filename, int mode)
547{
548 wchar_t wfilename[MAX_PATH];
549 if (xutftowcs_path(wfilename, filename) < 0)
550 return -1;
551 return _wchmod(wfilename, mode);
552}
553/*
555 * The unit of FILETIME is 100-nanoseconds since January 1, 1601, UTC.
556 * Returns the 100-nanoseconds ("hekto nanoseconds") since the epoch.
557 */
558static inline long long filetime_to_hnsec(const FILETIME *ft)
559{
560 long long winTime = ((long long)ft->dwHighDateTime << 32) + ft->dwLowDateTime;
561 /* Windows to Unix Epoch conversion */
562 return winTime - 116444736000000000LL;
563}
564static inline time_t filetime_to_time_t(const FILETIME *ft)
566{
567 return (time_t)(filetime_to_hnsec(ft) / 10000000);
568}
569/**
571 * Verifies that safe_create_leading_directories() would succeed.
572 */
573static int has_valid_directory_prefix(wchar_t *wfilename)
574{
575 int n = wcslen(wfilename);
576 while (n > 0) {
578 wchar_t c = wfilename[--n];
579 DWORD attributes;
580 if (!is_dir_sep(c))
582 continue;
583 wfilename[n] = L'\0';
585 attributes = GetFileAttributesW(wfilename);
586 wfilename[n] = c;
587 if (attributes == FILE_ATTRIBUTE_DIRECTORY ||
588 attributes == FILE_ATTRIBUTE_DEVICE)
589 return 1;
590 if (attributes == INVALID_FILE_ATTRIBUTES)
591 switch (GetLastError()) {
592 case ERROR_PATH_NOT_FOUND:
593 continue;
594 case ERROR_FILE_NOT_FOUND:
595 /* This implies parent directory exists. */
596 return 1;
597 }
598 return 0;
599 }
600 return 1;
601}
602/* We keep the do_lstat code in a separate function to avoid recursion.
604 * When a path ends with a slash, the stat will fail with ENOENT. In
605 * this case, we strip the trailing slashes and stat again.
606 *
607 * If follow is true then act like stat() and report on the link
608 * target. Otherwise report on the link itself.
609 */
610static int do_lstat(int follow, const char *file_name, struct stat *buf)
611{
612 WIN32_FILE_ATTRIBUTE_DATA fdata;
613 wchar_t wfilename[MAX_PATH];
614 if (xutftowcs_path(wfilename, file_name) < 0)
615 return -1;
616 if (GetFileAttributesExW(wfilename, GetFileExInfoStandard, &fdata)) {
618 buf->st_ino = 0;
619 buf->st_gid = 0;
620 buf->st_uid = 0;
621 buf->st_nlink = 1;
622 buf->st_mode = file_attr_to_st_mode(fdata.dwFileAttributes);
623 buf->st_size = fdata.nFileSizeLow |
624 (((off_t)fdata.nFileSizeHigh)<<32);
625 buf->st_dev = buf->st_rdev = 0; /* not used by Git */
626 buf->st_atime = filetime_to_time_t(&(fdata.ftLastAccessTime));
627 buf->st_mtime = filetime_to_time_t(&(fdata.ftLastWriteTime));
628 buf->st_ctime = filetime_to_time_t(&(fdata.ftCreationTime));
629 if (fdata.dwFileAttributes & FILE_ATTRIBUTE_REPARSE_POINT) {
630 WIN32_FIND_DATAW findbuf;
631 HANDLE handle = FindFirstFileW(wfilename, &findbuf);
632 if (handle != INVALID_HANDLE_VALUE) {
633 if ((findbuf.dwFileAttributes & FILE_ATTRIBUTE_REPARSE_POINT) &&
634 (findbuf.dwReserved0 == IO_REPARSE_TAG_SYMLINK)) {
635 if (follow) {
636 char buffer[MAXIMUM_REPARSE_DATA_BUFFER_SIZE];
637 buf->st_size = readlink(file_name, buffer, MAXIMUM_REPARSE_DATA_BUFFER_SIZE);
638 } else {
639 buf->st_mode = S_IFLNK;
640 }
641 buf->st_mode |= S_IREAD;
642 if (!(findbuf.dwFileAttributes & FILE_ATTRIBUTE_READONLY))
643 buf->st_mode |= S_IWRITE;
644 }
645 FindClose(handle);
646 }
647 }
648 return 0;
649 }
650 switch (GetLastError()) {
651 case ERROR_ACCESS_DENIED:
652 case ERROR_SHARING_VIOLATION:
653 case ERROR_LOCK_VIOLATION:
654 case ERROR_SHARING_BUFFER_EXCEEDED:
655 errno = EACCES;
656 break;
657 case ERROR_BUFFER_OVERFLOW:
658 errno = ENAMETOOLONG;
659 break;
660 case ERROR_NOT_ENOUGH_MEMORY:
661 errno = ENOMEM;
662 break;
663 case ERROR_PATH_NOT_FOUND:
664 if (!has_valid_directory_prefix(wfilename)) {
665 errno = ENOTDIR;
666 break;
667 }
668 /* fallthru */
669 default:
670 errno = ENOENT;
671 break;
672 }
673 return -1;
674}
675/* We provide our own lstat/fstat functions, since the provided
677 * lstat/fstat functions are so slow. These stat functions are
678 * tailored for Git's usage (read: fast), and are not meant to be
679 * complete. Note that Git stat()s are redirected to mingw_lstat()
680 * too, since Windows doesn't really handle symlinks that well.
681 */
682static int do_stat_internal(int follow, const char *file_name, struct stat *buf)
683{
684 int namelen;
685 char alt_name[PATH_MAX];
686 if (!do_lstat(follow, file_name, buf))
688 return 0;
689 /* if file_name ended in a '/', Windows returned ENOENT;
691 * try again without trailing slashes
692 */
693 if (errno != ENOENT)
694 return -1;
695 namelen = strlen(file_name);
697 if (namelen && file_name[namelen-1] != '/')
698 return -1;
699 while (namelen && file_name[namelen-1] == '/')
700 --namelen;
701 if (!namelen || namelen >= PATH_MAX)
702 return -1;
703 memcpy(alt_name, file_name, namelen);
705 alt_name[namelen] = 0;
706 return do_lstat(follow, alt_name, buf);
707}
708int mingw_lstat(const char *file_name, struct stat *buf)
710{
711 return do_stat_internal(0, file_name, buf);
712}
713int mingw_stat(const char *file_name, struct stat *buf)
714{
715 return do_stat_internal(1, file_name, buf);
716}
717int mingw_fstat(int fd, struct stat *buf)
719{
720 HANDLE fh = (HANDLE)_get_osfhandle(fd);
721 BY_HANDLE_FILE_INFORMATION fdata;
722 if (fh == INVALID_HANDLE_VALUE) {
724 errno = EBADF;
725 return -1;
726 }
727 /* direct non-file handles to MS's fstat() */
728 if (GetFileType(fh) != FILE_TYPE_DISK)
729 return _fstati64(fd, buf);
730 if (GetFileInformationByHandle(fh, &fdata)) {
732 buf->st_ino = 0;
733 buf->st_gid = 0;
734 buf->st_uid = 0;
735 buf->st_nlink = 1;
736 buf->st_mode = file_attr_to_st_mode(fdata.dwFileAttributes);
737 buf->st_size = fdata.nFileSizeLow |
738 (((off_t)fdata.nFileSizeHigh)<<32);
739 buf->st_dev = buf->st_rdev = 0; /* not used by Git */
740 buf->st_atime = filetime_to_time_t(&(fdata.ftLastAccessTime));
741 buf->st_mtime = filetime_to_time_t(&(fdata.ftLastWriteTime));
742 buf->st_ctime = filetime_to_time_t(&(fdata.ftCreationTime));
743 return 0;
744 }
745 errno = EBADF;
746 return -1;
747}
748static inline void time_t_to_filetime(time_t t, FILETIME *ft)
750{
751 long long winTime = t * 10000000LL + 116444736000000000LL;
752 ft->dwLowDateTime = winTime;
753 ft->dwHighDateTime = winTime >> 32;
754}
755int mingw_utime (const char *file_name, const struct utimbuf *times)
757{
758 FILETIME mft, aft;
759 int fh, rc;
760 DWORD attrs;
761 wchar_t wfilename[MAX_PATH];
762 if (xutftowcs_path(wfilename, file_name) < 0)
763 return -1;
764 /* must have write permission */
766 attrs = GetFileAttributesW(wfilename);
767 if (attrs != INVALID_FILE_ATTRIBUTES &&
768 (attrs & FILE_ATTRIBUTE_READONLY)) {
769 /* ignore errors here; open() will report them */
770 SetFileAttributesW(wfilename, attrs & ~FILE_ATTRIBUTE_READONLY);
771 }
772 if ((fh = _wopen(wfilename, O_RDWR | O_BINARY)) < 0) {
774 rc = -1;
775 goto revert_attrs;
776 }
777 if (times) {
779 time_t_to_filetime(times->modtime, &mft);
780 time_t_to_filetime(times->actime, &aft);
781 } else {
782 GetSystemTimeAsFileTime(&mft);
783 aft = mft;
784 }
785 if (!SetFileTime((HANDLE)_get_osfhandle(fh), NULL, &aft, &mft)) {
786 errno = EINVAL;
787 rc = -1;
788 } else
789 rc = 0;
790 close(fh);
791revert_attrs:
793 if (attrs != INVALID_FILE_ATTRIBUTES &&
794 (attrs & FILE_ATTRIBUTE_READONLY)) {
795 /* ignore errors again */
796 SetFileAttributesW(wfilename, attrs);
797 }
798 return rc;
799}
800#undef strftime
802size_t mingw_strftime(char *s, size_t max,
803 const char *format, const struct tm *tm)
804{
805 size_t ret = strftime(s, max, format, tm);
806 if (!ret && errno == EINVAL)
808 die("invalid strftime format: '%s'", format);
809 return ret;
810}
811unsigned int sleep (unsigned int seconds)
813{
814 Sleep(seconds*1000);
815 return 0;
816}
817char *mingw_mktemp(char *template)
819{
820 wchar_t wtemplate[MAX_PATH];
821 if (xutftowcs_path(wtemplate, template) < 0)
822 return NULL;
823 if (!_wmktemp(wtemplate))
824 return NULL;
825 if (xwcstoutf(template, wtemplate, strlen(template) + 1) < 0)
826 return NULL;
827 return template;
828}
829int mkstemp(char *template)
831{
832 char *filename = mktemp(template);
833 if (filename == NULL)
834 return -1;
835 return open(filename, O_RDWR | O_CREAT, 0600);
836}
837int gettimeofday(struct timeval *tv, void *tz)
839{
840 FILETIME ft;
841 long long hnsec;
842 GetSystemTimeAsFileTime(&ft);
844 hnsec = filetime_to_hnsec(&ft);
845 tv->tv_sec = hnsec / 10000000;
846 tv->tv_usec = (hnsec % 10000000) / 10;
847 return 0;
848}
849int pipe(int filedes[2])
851{
852 HANDLE h[2];
853 /* this creates non-inheritable handles */
855 if (!CreatePipe(&h[0], &h[1], NULL, 8192)) {
856 errno = err_win_to_posix(GetLastError());
857 return -1;
858 }
859 filedes[0] = _open_osfhandle(HCAST(int, h[0]), O_NOINHERIT);
860 if (filedes[0] < 0) {
861 CloseHandle(h[0]);
862 CloseHandle(h[1]);
863 return -1;
864 }
865 filedes[1] = _open_osfhandle(HCAST(int, h[1]), O_NOINHERIT);
866 if (filedes[1] < 0) {
867 close(filedes[0]);
868 CloseHandle(h[1]);
869 return -1;
870 }
871 return 0;
872}
873struct tm *gmtime_r(const time_t *timep, struct tm *result)
875{
876 /* gmtime() in MSVCRT.DLL is thread-safe, but not reentrant */
877 memcpy(result, gmtime(timep), sizeof(struct tm));
878 return result;
879}
880struct tm *localtime_r(const time_t *timep, struct tm *result)
882{
883 /* localtime() in MSVCRT.DLL is thread-safe, but not reentrant */
884 memcpy(result, localtime(timep), sizeof(struct tm));
885 return result;
886}
887char *mingw_getcwd(char *pointer, int len)
889{
890 wchar_t wpointer[MAX_PATH];
891 if (!_wgetcwd(wpointer, ARRAY_SIZE(wpointer)))
892 return NULL;
893 if (xwcstoutf(pointer, wpointer, len) < 0)
894 return NULL;
895 convert_slashes(pointer);
896 return pointer;
897}
898/*
900 * See http://msdn2.microsoft.com/en-us/library/17w5ykft(vs.71).aspx
901 * (Parsing C++ Command-Line Arguments)
902 */
903static const char *quote_arg(const char *arg)
904{
905 /* count chars to quote */
906 int len = 0, n = 0;
907 int force_quotes = 0;
908 char *q, *d;
909 const char *p = arg;
910 if (!*p) force_quotes = 1;
911 while (*p) {
912 if (isspace(*p) || *p == '*' || *p == '?' || *p == '{' || *p == '\'')
913 force_quotes = 1;
914 else if (*p == '"')
915 n++;
916 else if (*p == '\\') {
917 int count = 0;
918 while (*p == '\\') {
919 count++;
920 p++;
921 len++;
922 }
923 if (*p == '"')
924 n += count*2 + 1;
925 continue;
926 }
927 len++;
928 p++;
929 }
930 if (!force_quotes && n == 0)
931 return arg;
932 /* insert \ where necessary */
934 d = q = xmalloc(st_add3(len, n, 3));
935 *d++ = '"';
936 while (*arg) {
937 if (*arg == '"')
938 *d++ = '\\';
939 else if (*arg == '\\') {
940 int count = 0;
941 while (*arg == '\\') {
942 count++;
943 *d++ = *arg++;
944 }
945 if (*arg == '"') {
946 while (count-- > 0)
947 *d++ = '\\';
948 *d++ = '\\';
949 }
950 }
951 *d++ = *arg++;
952 }
953 *d++ = '"';
954 *d++ = 0;
955 return q;
956}
957static const char *parse_interpreter(const char *cmd)
959{
960 static char buf[100];
961 char *p, *opt;
962 int n, fd;
963 /* don't even try a .exe */
965 n = strlen(cmd);
966 if (n >= 4 && !strcasecmp(cmd+n-4, ".exe"))
967 return NULL;
968 fd = open(cmd, O_RDONLY);
970 if (fd < 0)
971 return NULL;
972 n = read(fd, buf, sizeof(buf)-1);
973 close(fd);
974 if (n < 4) /* at least '#!/x' and not error */
975 return NULL;
976 if (buf[0] != '#' || buf[1] != '!')
978 return NULL;
979 buf[n] = '\0';
980 p = buf + strcspn(buf, "\r\n");
981 if (!*p)
982 return NULL;
983 *p = '\0';
985 if (!(p = strrchr(buf+2, '/')) && !(p = strrchr(buf+2, '\\')))
986 return NULL;
987 /* strip options */
988 if ((opt = strchr(p+1, ' ')))
989 *opt = '\0';
990 return p+1;
991}
992/*
994 * exe_only means that we only want to detect .exe files, but not scripts
995 * (which do not have an extension)
996 */
997static char *lookup_prog(const char *dir, int dirlen, const char *cmd,
998 int isexe, int exe_only)
999{
1000 char path[MAX_PATH];
1001 snprintf(path, sizeof(path), "%.*s\\%s.exe", dirlen, dir, cmd);
1002 if (!isexe && access(path, F_OK) == 0)
1004 return xstrdup(path);
1005 path[strlen(path)-4] = '\0';
1006 if ((!exe_only || isexe) && access(path, F_OK) == 0)
1007 if (!(GetFileAttributes(path) & FILE_ATTRIBUTE_DIRECTORY))
1008 return xstrdup(path);
1009 return NULL;
1010}
1011/*
1013 * Determines the absolute path of cmd using the split path in path.
1014 * If cmd contains a slash or backslash, no lookup is performed.
1015 */
1016static char *path_lookup(const char *cmd, int exe_only)
1017{
1018 const char *path;
1019 char *prog = NULL;
1020 int len = strlen(cmd);
1021 int isexe = len >= 4 && !strcasecmp(cmd+len-4, ".exe");
1022 if (strchr(cmd, '/') || strchr(cmd, '\\'))
1024 return xstrdup(cmd);
1025 path = mingw_getenv("PATH");
1027 if (!path)
1028 return NULL;
1029 while (!prog) {
1031 const char *sep = strchrnul(path, ';');
1032 int dirlen = sep - path;
1033 if (dirlen)
1034 prog = lookup_prog(path, dirlen, cmd, isexe, exe_only);
1035 if (!*sep)
1036 break;
1037 path = sep + 1;
1038 }
1039 return prog;
1041}
1042static const wchar_t *wcschrnul(const wchar_t *s, wchar_t c)
1044{
1045 while (*s && *s != c)
1046 s++;
1047 return s;
1048}
1049/* Compare only keys */
1051static int wenvcmp(const void *a, const void *b)
1052{
1053 wchar_t *p = *(wchar_t **)a, *q = *(wchar_t **)b;
1054 size_t p_len, q_len;
1055 /* Find the keys */
1057 p_len = wcschrnul(p, L'=') - p;
1058 q_len = wcschrnul(q, L'=') - q;
1059 /* If the length differs, include the shorter key's NUL */
1061 if (p_len < q_len)
1062 p_len++;
1063 else if (p_len > q_len)
1064 p_len = q_len + 1;
1065 return _wcsnicmp(p, q, p_len);
1067}
1068/* We need a stable sort to convert the environment between UTF-16 <-> UTF-8 */
1070#ifndef INTERNAL_QSORT
1071#include "qsort.c"
1072#endif
1073/*
1075 * Build an environment block combining the inherited environment
1076 * merged with the given list of settings.
1077 *
1078 * Values of the form "KEY=VALUE" in deltaenv override inherited values.
1079 * Values of the form "KEY" in deltaenv delete inherited values.
1080 *
1081 * Multiple entries in deltaenv for the same key are explicitly allowed.
1082 *
1083 * We return a contiguous block of UNICODE strings with a final trailing
1084 * zero word.
1085 */
1086static wchar_t *make_environment_block(char **deltaenv)
1087{
1088 wchar_t *wenv = GetEnvironmentStringsW(), *wdeltaenv, *result, *p;
1089 size_t wlen, s, delta_size, size;
1090 wchar_t **array = NULL;
1092 size_t alloc = 0, nr = 0, i;
1093 size = 1; /* for extra NUL at the end */
1095 /* If there is no deltaenv to apply, simply return a copy. */
1097 if (!deltaenv || !*deltaenv) {
1098 for (p = wenv; p && *p; ) {
1099 size_t s = wcslen(p) + 1;
1100 size += s;
1101 p += s;
1102 }
1103 ALLOC_ARRAY(result, size);
1105 memcpy(result, wenv, size * sizeof(*wenv));
1106 FreeEnvironmentStringsW(wenv);
1107 return result;
1108 }
1109 /*
1111 * If there is a deltaenv, let's accumulate all keys into `array`,
1112 * sort them using the stable git_qsort() and then copy, skipping
1113 * duplicate keys
1114 */
1115 for (p = wenv; p && *p; ) {
1116 ALLOC_GROW(array, nr + 1, alloc);
1117 s = wcslen(p) + 1;
1118 array[nr++] = p;
1119 p += s;
1120 size += s;
1121 }
1122 /* (over-)assess size needed for wchar version of deltaenv */
1124 for (delta_size = 0, i = 0; deltaenv[i]; i++)
1125 delta_size += strlen(deltaenv[i]) * 2 + 1;
1126 ALLOC_ARRAY(wdeltaenv, delta_size);
1127 /* convert the deltaenv, appending to array */
1129 for (i = 0, p = wdeltaenv; deltaenv[i]; i++) {
1130 ALLOC_GROW(array, nr + 1, alloc);
1131 wlen = xutftowcs(p, deltaenv[i], wdeltaenv + delta_size - p);
1132 array[nr++] = p;
1133 p += wlen + 1;
1134 }
1135 git_qsort(array, nr, sizeof(*array), wenvcmp);
1137 ALLOC_ARRAY(result, size + delta_size);
1138 for (p = result, i = 0; i < nr; i++) {
1140 /* Skip any duplicate keys; last one wins */
1141 while (i + 1 < nr && !wenvcmp(array + i, array + i + 1))
1142 i++;
1143 /* Skip "to delete" entry */
1145 if (!wcschr(array[i], L'='))
1146 continue;
1147 size = wcslen(array[i]) + 1;
1149 memcpy(p, array[i], size * sizeof(*p));
1150 p += size;
1151 }
1152 *p = L'\0';
1153 free(array);
1155 free(wdeltaenv);
1156 FreeEnvironmentStringsW(wenv);
1157 return result;
1158}
1159struct pinfo_t {
1161 struct pinfo_t *next;
1162 pid_t pid;
1163 HANDLE proc;
1164};
1165static struct pinfo_t *pinfo = NULL;
1166CRITICAL_SECTION pinfo_cs;
1167static pid_t mingw_spawnve_fd(const char *cmd, const char **argv, char **deltaenv,
1169 const char *dir,
1170 int prepend_cmd, int fhin, int fhout, int fherr)
1171{
1172 STARTUPINFOW si;
1173 PROCESS_INFORMATION pi;
1174 struct strbuf args;
1175 wchar_t wcmd[MAX_PATH], wdir[MAX_PATH], *wargs, *wenvblk = NULL;
1176 unsigned flags = CREATE_UNICODE_ENVIRONMENT;
1177 BOOL ret;
1178 /* Determine whether or not we are associated to a console */
1180 HANDLE cons = CreateFile("CONOUT$", GENERIC_WRITE,
1181 FILE_SHARE_WRITE, NULL, OPEN_EXISTING,
1182 FILE_ATTRIBUTE_NORMAL, NULL);
1183 if (cons == INVALID_HANDLE_VALUE) {
1184 /* There is no console associated with this process.
1185 * Since the child is a console process, Windows
1186 * would normally create a console window. But
1187 * since we'll be redirecting std streams, we do
1188 * not need the console.
1189 * It is necessary to use DETACHED_PROCESS
1190 * instead of CREATE_NO_WINDOW to make ssh
1191 * recognize that it has no console.
1192 */
1193 flags |= DETACHED_PROCESS;
1194 } else {
1195 /* There is already a console. If we specified
1196 * DETACHED_PROCESS here, too, Windows would
1197 * disassociate the child from the console.
1198 * The same is true for CREATE_NO_WINDOW.
1199 * Go figure!
1200 */
1201 CloseHandle(cons);
1202 }
1203 memset(&si, 0, sizeof(si));
1204 si.cb = sizeof(si);
1205 si.dwFlags = STARTF_USESTDHANDLES;
1206 si.hStdInput = winansi_get_osfhandle(fhin);
1207 si.hStdOutput = winansi_get_osfhandle(fhout);
1208 si.hStdError = winansi_get_osfhandle(fherr);
1209 if (xutftowcs_path(wcmd, cmd) < 0)
1211 return -1;
1212 if (dir && xutftowcs_path(wdir, dir) < 0)
1213 return -1;
1214 /* concatenate argv, quoting args as we go */
1216 strbuf_init(&args, 0);
1217 if (prepend_cmd) {
1218 char *quoted = (char *)quote_arg(cmd);
1219 strbuf_addstr(&args, quoted);
1220 if (quoted != cmd)
1221 free(quoted);
1222 }
1223 for (; *argv; argv++) {
1224 char *quoted = (char *)quote_arg(*argv);
1225 if (*args.buf)
1226 strbuf_addch(&args, ' ');
1227 strbuf_addstr(&args, quoted);
1228 if (quoted != *argv)
1229 free(quoted);
1230 }
1231 ALLOC_ARRAY(wargs, st_add(st_mult(2, args.len), 1));
1233 xutftowcs(wargs, args.buf, 2 * args.len + 1);
1234 strbuf_release(&args);
1235 wenvblk = make_environment_block(deltaenv);
1237 memset(&pi, 0, sizeof(pi));
1239 ret = CreateProcessW(wcmd, wargs, NULL, NULL, TRUE, flags,
1240 wenvblk, dir ? wdir : NULL, &si, &pi);
1241 free(wenvblk);
1243 free(wargs);
1244 if (!ret) {
1246 errno = ENOENT;
1247 return -1;
1248 }
1249 CloseHandle(pi.hThread);
1250 /*
1252 * The process ID is the human-readable identifier of the process
1253 * that we want to present in log and error messages. The handle
1254 * is not useful for this purpose. But we cannot close it, either,
1255 * because it is not possible to turn a process ID into a process
1256 * handle after the process terminated.
1257 * Keep the handle in a list for waitpid.
1258 */
1259 EnterCriticalSection(&pinfo_cs);
1260 {
1261 struct pinfo_t *info = xmalloc(sizeof(struct pinfo_t));
1262 info->pid = pi.dwProcessId;
1263 info->proc = pi.hProcess;
1264 info->next = pinfo;
1265 pinfo = info;
1266 }
1267 LeaveCriticalSection(&pinfo_cs);
1268 return (pid_t)pi.dwProcessId;
1270}
1271static pid_t mingw_spawnv(const char *cmd, const char **argv, int prepend_cmd)
1273{
1274 return mingw_spawnve_fd(cmd, argv, NULL, NULL, prepend_cmd, 0, 1, 2);
1275}
1276pid_t mingw_spawnvpe(const char *cmd, const char **argv, char **deltaenv,
1278 const char *dir,
1279 int fhin, int fhout, int fherr)
1280{
1281 pid_t pid;
1282 char *prog = path_lookup(cmd, 0);
1283 if (!prog) {
1285 errno = ENOENT;
1286 pid = -1;
1287 }
1288 else {
1289 const char *interpr = parse_interpreter(prog);
1290 if (interpr) {
1292 const char *argv0 = argv[0];
1293 char *iprog = path_lookup(interpr, 1);
1294 argv[0] = prog;
1295 if (!iprog) {
1296 errno = ENOENT;
1297 pid = -1;
1298 }
1299 else {
1300 pid = mingw_spawnve_fd(iprog, argv, deltaenv, dir, 1,
1301 fhin, fhout, fherr);
1302 free(iprog);
1303 }
1304 argv[0] = argv0;
1305 }
1306 else
1307 pid = mingw_spawnve_fd(prog, argv, deltaenv, dir, 0,
1308 fhin, fhout, fherr);
1309 free(prog);
1310 }
1311 return pid;
1312}
1313static int try_shell_exec(const char *cmd, char *const *argv)
1315{
1316 const char *interpr = parse_interpreter(cmd);
1317 char *prog;
1318 int pid = 0;
1319 if (!interpr)
1321 return 0;
1322 prog = path_lookup(interpr, 1);
1323 if (prog) {
1324 int argc = 0;
1325 const char **argv2;
1326 while (argv[argc]) argc++;
1327 ALLOC_ARRAY(argv2, argc + 1);
1328 argv2[0] = (char *)cmd; /* full path to the script file */
1329 memcpy(&argv2[1], &argv[1], sizeof(*argv) * argc);
1330 pid = mingw_spawnv(prog, argv2, 1);
1331 if (pid >= 0) {
1332 int status;
1333 if (waitpid(pid, &status, 0) < 0)
1334 status = 255;
1335 exit(status);
1336 }
1337 pid = 1; /* indicate that we tried but failed */
1338 free(prog);
1339 free(argv2);
1340 }
1341 return pid;
1342}
1343int mingw_execv(const char *cmd, char *const *argv)
1345{
1346 /* check if git_command is a shell script */
1347 if (!try_shell_exec(cmd, argv)) {
1348 int pid, status;
1349 pid = mingw_spawnv(cmd, (const char **)argv, 0);
1351 if (pid < 0)
1352 return -1;
1353 if (waitpid(pid, &status, 0) < 0)
1354 status = 255;
1355 exit(status);
1356 }
1357 return -1;
1358}
1359int mingw_execvp(const char *cmd, char *const *argv)
1361{
1362 char *prog = path_lookup(cmd, 0);
1363 if (prog) {
1365 mingw_execv(prog, argv);
1366 free(prog);
1367 } else
1368 errno = ENOENT;
1369 return -1;
1371}
1372int mingw_kill(pid_t pid, int sig)
1374{
1375 if (pid > 0 && sig == SIGTERM) {
1376 HANDLE h = OpenProcess(PROCESS_TERMINATE, FALSE, pid);
1377 if (TerminateProcess(h, -1)) {
1379 CloseHandle(h);
1380 return 0;
1381 }
1382 errno = err_win_to_posix(GetLastError());
1384 CloseHandle(h);
1385 return -1;
1386 } else if (pid > 0 && sig == 0) {
1387 HANDLE h = OpenProcess(PROCESS_QUERY_INFORMATION, FALSE, pid);
1388 if (h) {
1389 CloseHandle(h);
1390 return 0;
1391 }
1392 }
1393 errno = EINVAL;
1395 return -1;
1396}
1397/*
1399 * UTF-8 versions of getenv(), putenv() and unsetenv().
1400 * Internally, they use the CRT's stock UNICODE routines
1401 * to avoid data loss.
1402 */
1403char *mingw_getenv(const char *name)
1404{
1405#define GETENV_MAX_RETAIN 30
1406 static char *values[GETENV_MAX_RETAIN];
1407 static int value_counter;
1408 int len_key, len_value;
1409 wchar_t *w_key;
1410 char *value;
1411 wchar_t w_value[32768];
1412 if (!name || !*name)
1414 return NULL;
1415 len_key = strlen(name) + 1;
1417 /* We cannot use xcalloc() here because that uses getenv() itself */
1418 w_key = calloc(len_key, sizeof(wchar_t));
1419 if (!w_key)
1420 die("Out of memory, (tried to allocate %u wchar_t's)", len_key);
1421 xutftowcs(w_key, name, len_key);
1422 len_value = GetEnvironmentVariableW(w_key, w_value, ARRAY_SIZE(w_value));
1423 if (!len_value && GetLastError() == ERROR_ENVVAR_NOT_FOUND) {
1424 free(w_key);
1425 return NULL;
1426 }
1427 free(w_key);
1428 len_value = len_value * 3 + 1;
1430 /* We cannot use xcalloc() here because that uses getenv() itself */
1431 value = calloc(len_value, sizeof(char));
1432 if (!value)
1433 die("Out of memory, (tried to allocate %u bytes)", len_value);
1434 xwcstoutf(value, w_value, len_value);
1435 /*
1437 * We return `value` which is an allocated value and the caller is NOT
1438 * expecting to have to free it, so we keep a round-robin array,
1439 * invalidating the buffer after GETENV_MAX_RETAIN getenv() calls.
1440 */
1441 free(values[value_counter]);
1442 values[value_counter++] = value;
1443 if (value_counter >= ARRAY_SIZE(values))
1444 value_counter = 0;
1445 return value;
1447}
1448int mingw_putenv(const char *namevalue)
1450{
1451 int size;
1452 wchar_t *wide, *equal;
1453 BOOL result;
1454 if (!namevalue || !*namevalue)
1456 return 0;
1457 size = strlen(namevalue) * 2 + 1;
1459 wide = calloc(size, sizeof(wchar_t));
1460 if (!wide)
1461 die("Out of memory, (tried to allocate %u wchar_t's)", size);
1462 xutftowcs(wide, namevalue, size);
1463 equal = wcschr(wide, L'=');
1464 if (!equal)
1465 result = SetEnvironmentVariableW(wide, NULL);
1466 else {
1467 *equal = L'\0';
1468 result = SetEnvironmentVariableW(wide, equal + 1);
1469 }
1470 free(wide);
1471 if (!result)
1473 errno = err_win_to_posix(GetLastError());
1474 return result ? 0 : -1;
1476}
1477/*
1479 * Note, this isn't a complete replacement for getaddrinfo. It assumes
1480 * that service contains a numerical port, or that it is null. It
1481 * does a simple search using gethostbyname, and returns one IPv4 host
1482 * if one was found.
1483 */
1484static int WSAAPI getaddrinfo_stub(const char *node, const char *service,
1485 const struct addrinfo *hints,
1486 struct addrinfo **res)
1487{
1488 struct hostent *h = NULL;
1489 struct addrinfo *ai;
1490 struct sockaddr_in *sin;
1491 if (node) {
1493 h = gethostbyname(node);
1494 if (!h)
1495 return WSAGetLastError();
1496 }
1497 ai = xmalloc(sizeof(struct addrinfo));
1499 *res = ai;
1500 ai->ai_flags = 0;
1501 ai->ai_family = AF_INET;
1502 ai->ai_socktype = hints ? hints->ai_socktype : 0;
1503 switch (ai->ai_socktype) {
1504 case SOCK_STREAM:
1505 ai->ai_protocol = IPPROTO_TCP;
1506 break;
1507 case SOCK_DGRAM:
1508 ai->ai_protocol = IPPROTO_UDP;
1509 break;
1510 default:
1511 ai->ai_protocol = 0;
1512 break;
1513 }
1514 ai->ai_addrlen = sizeof(struct sockaddr_in);
1515 if (hints && (hints->ai_flags & AI_CANONNAME))
1516 ai->ai_canonname = h ? xstrdup(h->h_name) : NULL;
1517 else
1518 ai->ai_canonname = NULL;
1519 sin = xcalloc(1, ai->ai_addrlen);
1521 sin->sin_family = AF_INET;
1522 /* Note: getaddrinfo is supposed to allow service to be a string,
1523 * which should be looked up using getservbyname. This is
1524 * currently not implemented */
1525 if (service)
1526 sin->sin_port = htons(atoi(service));
1527 if (h)
1528 sin->sin_addr = *(struct in_addr *)h->h_addr;
1529 else if (hints && (hints->ai_flags & AI_PASSIVE))
1530 sin->sin_addr.s_addr = INADDR_ANY;
1531 else
1532 sin->sin_addr.s_addr = INADDR_LOOPBACK;
1533 ai->ai_addr = (struct sockaddr *)sin;
1534 ai->ai_next = NULL;
1535 return 0;
1536}
1537static void WSAAPI freeaddrinfo_stub(struct addrinfo *res)
1539{
1540 free(res->ai_canonname);
1541 free(res->ai_addr);
1542 free(res);
1543}
1544static int WSAAPI getnameinfo_stub(const struct sockaddr *sa, socklen_t salen,
1546 char *host, DWORD hostlen,
1547 char *serv, DWORD servlen, int flags)
1548{
1549 const struct sockaddr_in *sin = (const struct sockaddr_in *)sa;
1550 if (sa->sa_family != AF_INET)
1551 return EAI_FAMILY;
1552 if (!host && !serv)
1553 return EAI_NONAME;
1554 if (host && hostlen > 0) {
1556 struct hostent *ent = NULL;
1557 if (!(flags & NI_NUMERICHOST))
1558 ent = gethostbyaddr((const char *)&sin->sin_addr,
1559 sizeof(sin->sin_addr), AF_INET);
1560 if (ent)
1562 snprintf(host, hostlen, "%s", ent->h_name);
1563 else if (flags & NI_NAMEREQD)
1564 return EAI_NONAME;
1565 else
1566 snprintf(host, hostlen, "%s", inet_ntoa(sin->sin_addr));
1567 }
1568 if (serv && servlen > 0) {
1570 struct servent *ent = NULL;
1571 if (!(flags & NI_NUMERICSERV))
1572 ent = getservbyport(sin->sin_port,
1573 flags & NI_DGRAM ? "udp" : "tcp");
1574 if (ent)
1576 snprintf(serv, servlen, "%s", ent->s_name);
1577 else
1578 snprintf(serv, servlen, "%d", ntohs(sin->sin_port));
1579 }
1580 return 0;
1582}
1583static HMODULE ipv6_dll = NULL;
1585static void (WSAAPI *ipv6_freeaddrinfo)(struct addrinfo *res);
1586static int (WSAAPI *ipv6_getaddrinfo)(const char *node, const char *service,
1587 const struct addrinfo *hints,
1588 struct addrinfo **res);
1589static int (WSAAPI *ipv6_getnameinfo)(const struct sockaddr *sa, socklen_t salen,
1590 char *host, DWORD hostlen,
1591 char *serv, DWORD servlen, int flags);
1592/*
1593 * gai_strerror is an inline function in the ws2tcpip.h header, so we
1594 * don't need to try to load that one dynamically.
1595 */
1596static void socket_cleanup(void)
1598{
1599 WSACleanup();
1600 if (ipv6_dll)
1601 FreeLibrary(ipv6_dll);
1602 ipv6_dll = NULL;
1603 ipv6_freeaddrinfo = freeaddrinfo_stub;
1604 ipv6_getaddrinfo = getaddrinfo_stub;
1605 ipv6_getnameinfo = getnameinfo_stub;
1606}
1607static void ensure_socket_initialization(void)
1609{
1610 WSADATA wsa;
1611 static int initialized = 0;
1612 const char *libraries[] = { "ws2_32.dll", "wship6.dll", NULL };
1613 const char **name;
1614 if (initialized)
1616 return;
1617 if (WSAStartup(MAKEWORD(2,2), &wsa))
1619 die("unable to initialize winsock subsystem, error %d",
1620 WSAGetLastError());
1621 for (name = libraries; *name; name++) {
1623 ipv6_dll = LoadLibrary(*name);
1624 if (!ipv6_dll)
1625 continue;
1626 ipv6_freeaddrinfo = (void (WSAAPI *)(struct addrinfo *))
1628 GetProcAddress(ipv6_dll, "freeaddrinfo");
1629 ipv6_getaddrinfo = (int (WSAAPI *)(const char *, const char *,
1630 const struct addrinfo *,
1631 struct addrinfo **))
1632 GetProcAddress(ipv6_dll, "getaddrinfo");
1633 ipv6_getnameinfo = (int (WSAAPI *)(const struct sockaddr *,
1634 socklen_t, char *, DWORD,
1635 char *, DWORD, int))
1636 GetProcAddress(ipv6_dll, "getnameinfo");
1637 if (!ipv6_freeaddrinfo || !ipv6_getaddrinfo || !ipv6_getnameinfo) {
1638 FreeLibrary(ipv6_dll);
1639 ipv6_dll = NULL;
1640 } else
1641 break;
1642 }
1643 if (!ipv6_freeaddrinfo || !ipv6_getaddrinfo || !ipv6_getnameinfo) {
1644 ipv6_freeaddrinfo = freeaddrinfo_stub;
1645 ipv6_getaddrinfo = getaddrinfo_stub;
1646 ipv6_getnameinfo = getnameinfo_stub;
1647 }
1648 atexit(socket_cleanup);
1650 initialized = 1;
1651}
1652#undef gethostname
1654int mingw_gethostname(char *name, int namelen)
1655{
1656 ensure_socket_initialization();
1657 return gethostname(name, namelen);
1658}
1659#undef gethostbyname
1661struct hostent *mingw_gethostbyname(const char *host)
1662{
1663 ensure_socket_initialization();
1664 return gethostbyname(host);
1665}
1666void mingw_freeaddrinfo(struct addrinfo *res)
1668{
1669 ipv6_freeaddrinfo(res);
1670}
1671int mingw_getaddrinfo(const char *node, const char *service,
1673 const struct addrinfo *hints, struct addrinfo **res)
1674{
1675 ensure_socket_initialization();
1676 return ipv6_getaddrinfo(node, service, hints, res);
1677}
1678int mingw_getnameinfo(const struct sockaddr *sa, socklen_t salen,
1680 char *host, DWORD hostlen, char *serv, DWORD servlen,
1681 int flags)
1682{
1683 ensure_socket_initialization();
1684 return ipv6_getnameinfo(sa, salen, host, hostlen, serv, servlen, flags);
1685}
1686int mingw_socket(int domain, int type, int protocol)
1688{
1689 int sockfd;
1690 SOCKET s;
1691 ensure_socket_initialization();
1693 s = WSASocket(domain, type, protocol, NULL, 0, 0);
1694 if (s == INVALID_SOCKET) {
1695 /*
1696 * WSAGetLastError() values are regular BSD error codes
1697 * biased by WSABASEERR.
1698 * However, strerror() does not know about networking
1699 * specific errors, which are values beginning at 38 or so.
1700 * Therefore, we choose to leave the biased error code
1701 * in errno so that _if_ someone looks up the code somewhere,
1702 * then it is at least the number that are usually listed.
1703 */
1704 errno = WSAGetLastError();
1705 return -1;
1706 }
1707 /* convert into a file descriptor */
1708 if ((sockfd = _open_osfhandle(s, O_RDWR|O_BINARY)) < 0) {
1709 closesocket(s);
1710 return error("unable to make a socket file descriptor: %s",
1711 strerror(errno));
1712 }
1713 return sockfd;
1714}
1715#undef connect
1717int mingw_connect(int sockfd, struct sockaddr *sa, size_t sz)
1718{
1719 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
1720 return connect(s, sa, sz);
1721}
1722#undef bind
1724int mingw_bind(int sockfd, struct sockaddr *sa, size_t sz)
1725{
1726 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
1727 return bind(s, sa, sz);
1728}
1729#undef setsockopt
1731int mingw_setsockopt(int sockfd, int lvl, int optname, void *optval, int optlen)
1732{
1733 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
1734 return setsockopt(s, lvl, optname, (const char*)optval, optlen);
1735}
1736#undef shutdown
1738int mingw_shutdown(int sockfd, int how)
1739{
1740 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
1741 return shutdown(s, how);
1742}
1743#undef listen
1745int mingw_listen(int sockfd, int backlog)
1746{
1747 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
1748 return listen(s, backlog);
1749}
1750#undef accept
1752int mingw_accept(int sockfd1, struct sockaddr *sa, socklen_t *sz)
1753{
1754 int sockfd2;
1755 SOCKET s1 = (SOCKET)_get_osfhandle(sockfd1);
1757 SOCKET s2 = accept(s1, sa, sz);
1758 /* convert into a file descriptor */
1760 if ((sockfd2 = _open_osfhandle(s2, O_RDWR|O_BINARY)) < 0) {
1761 int err = errno;
1762 closesocket(s2);
1763 return error("unable to make a socket file descriptor: %s",
1764 strerror(err));
1765 }
1766 return sockfd2;
1767}
1768#undef rename
1770int mingw_rename(const char *pold, const char *pnew)
1771{
1772 DWORD attrs, gle;
1773 int tries = 0;
1774 wchar_t wpold[MAX_PATH], wpnew[MAX_PATH];
1775 if (xutftowcs_path(wpold, pold) < 0 || xutftowcs_path(wpnew, pnew) < 0)
1776 return -1;
1777 /*
1779 * Try native rename() first to get errno right.
1780 * It is based on MoveFile(), which cannot overwrite existing files.
1781 */
1782 if (!_wrename(wpold, wpnew))
1783 return 0;
1784 if (errno != EEXIST)
1785 return -1;
1786repeat:
1787 if (MoveFileExW(wpold, wpnew, MOVEFILE_REPLACE_EXISTING))
1788 return 0;
1789 /* TODO: translate more errors */
1790 gle = GetLastError();
1791 if (gle == ERROR_ACCESS_DENIED &&
1792 (attrs = GetFileAttributesW(wpnew)) != INVALID_FILE_ATTRIBUTES) {
1793 if (attrs & FILE_ATTRIBUTE_DIRECTORY) {
1794 DWORD attrsold = GetFileAttributesW(wpold);
1795 if (attrsold == INVALID_FILE_ATTRIBUTES ||
1796 !(attrsold & FILE_ATTRIBUTE_DIRECTORY))
1797 errno = EISDIR;
1798 else if (!_wrmdir(wpnew))
1799 goto repeat;
1800 return -1;
1801 }
1802 if ((attrs & FILE_ATTRIBUTE_READONLY) &&
1803 SetFileAttributesW(wpnew, attrs & ~FILE_ATTRIBUTE_READONLY)) {
1804 if (MoveFileExW(wpold, wpnew, MOVEFILE_REPLACE_EXISTING))
1805 return 0;
1806 gle = GetLastError();
1807 /* revert file attributes on failure */
1808 SetFileAttributesW(wpnew, attrs);
1809 }
1810 }
1811 if (tries < ARRAY_SIZE(delay) && gle == ERROR_ACCESS_DENIED) {
1812 /*
1813 * We assume that some other process had the source or
1814 * destination file open at the wrong moment and retry.
1815 * In order to give the other process a higher chance to
1816 * complete its operation, we give up our time slice now.
1817 * If we have to retry again, we do sleep a bit.
1818 */
1819 Sleep(delay[tries]);
1820 tries++;
1821 goto repeat;
1822 }
1823 if (gle == ERROR_ACCESS_DENIED &&
1824 ask_yes_no_if_possible("Rename from '%s' to '%s' failed. "
1825 "Should I try again?", pold, pnew))
1826 goto repeat;
1827 errno = EACCES;
1829 return -1;
1830}
1831/*
1833 * Note that this doesn't return the actual pagesize, but
1834 * the allocation granularity. If future Windows specific git code
1835 * needs the real getpagesize function, we need to find another solution.
1836 */
1837int mingw_getpagesize(void)
1838{
1839 SYSTEM_INFO si;
1840 GetSystemInfo(&si);
1841 return si.dwAllocationGranularity;
1842}
1843struct passwd *getpwuid(int uid)
1845{
1846 static char user_name[100];
1847 static struct passwd p;
1848 DWORD len = sizeof(user_name);
1850 if (!GetUserName(user_name, &len))
1851 return NULL;
1852 p.pw_name = user_name;
1853 p.pw_gecos = "unknown";
1854 p.pw_dir = NULL;
1855 return &p;
1856}
1857static HANDLE timer_event;
1859static HANDLE timer_thread;
1860static int timer_interval;
1861static int one_shot;
1862static sig_handler_t timer_fn = SIG_DFL, sigint_fn = SIG_DFL;
1863/* The timer works like this:
1865 * The thread, ticktack(), is a trivial routine that most of the time
1866 * only waits to receive the signal to terminate. The main thread tells
1867 * the thread to terminate by setting the timer_event to the signalled
1868 * state.
1869 * But ticktack() interrupts the wait state after the timer's interval
1870 * length to call the signal handler.
1871 */
1872static unsigned __stdcall ticktack(void *dummy)
1874{
1875 while (WaitForSingleObject(timer_event, timer_interval) == WAIT_TIMEOUT) {
1876 mingw_raise(SIGALRM);
1877 if (one_shot)
1878 break;
1879 }
1880 return 0;
1881}
1882static int start_timer_thread(void)
1884{
1885 timer_event = CreateEvent(NULL, FALSE, FALSE, NULL);
1886 if (timer_event) {
1887 timer_thread = (HANDLE) _beginthreadex(NULL, 0, ticktack, NULL, 0, NULL);
1888 if (!timer_thread )
1889 return errno = ENOMEM,
1890 error("cannot start timer thread");
1891 } else
1892 return errno = ENOMEM,
1893 error("cannot allocate resources for timer");
1894 return 0;
1895}
1896static void stop_timer_thread(void)
1898{
1899 if (timer_event)
1900 SetEvent(timer_event); /* tell thread to terminate */
1901 if (timer_thread) {
1902 int rc = WaitForSingleObject(timer_thread, 1000);
1903 if (rc == WAIT_TIMEOUT)
1904 error("timer thread did not terminate timely");
1905 else if (rc != WAIT_OBJECT_0)
1906 error("waiting for timer thread failed: %lu",
1907 GetLastError());
1908 CloseHandle(timer_thread);
1909 }
1910 if (timer_event)
1911 CloseHandle(timer_event);
1912 timer_event = NULL;
1913 timer_thread = NULL;
1914}
1915static inline int is_timeval_eq(const struct timeval *i1, const struct timeval *i2)
1917{
1918 return i1->tv_sec == i2->tv_sec && i1->tv_usec == i2->tv_usec;
1919}
1920int setitimer(int type, struct itimerval *in, struct itimerval *out)
1922{
1923 static const struct timeval zero;
1924 static int atexit_done;
1925 if (out != NULL)
1927 return errno = EINVAL,
1928 error("setitimer param 3 != NULL not implemented");
1929 if (!is_timeval_eq(&in->it_interval, &zero) &&
1930 !is_timeval_eq(&in->it_interval, &in->it_value))
1931 return errno = EINVAL,
1932 error("setitimer: it_interval must be zero or eq it_value");
1933 if (timer_thread)
1935 stop_timer_thread();
1936 if (is_timeval_eq(&in->it_value, &zero) &&
1938 is_timeval_eq(&in->it_interval, &zero))
1939 return 0;
1940 timer_interval = in->it_value.tv_sec * 1000 + in->it_value.tv_usec / 1000;
1942 one_shot = is_timeval_eq(&in->it_interval, &zero);
1943 if (!atexit_done) {
1944 atexit(stop_timer_thread);
1945 atexit_done = 1;
1946 }
1947 return start_timer_thread();
1948}
1949int sigaction(int sig, struct sigaction *in, struct sigaction *out)
1951{
1952 if (sig != SIGALRM)
1953 return errno = EINVAL,
1954 error("sigaction only implemented for SIGALRM");
1955 if (out != NULL)
1956 return errno = EINVAL,
1957 error("sigaction: param 3 != NULL not implemented");
1958 timer_fn = in->sa_handler;
1960 return 0;
1961}
1962#undef signal
1964sig_handler_t mingw_signal(int sig, sig_handler_t handler)
1965{
1966 sig_handler_t old;
1967 switch (sig) {
1969 case SIGALRM:
1970 old = timer_fn;
1971 timer_fn = handler;
1972 break;
1973 case SIGINT:
1975 old = sigint_fn;
1976 sigint_fn = handler;
1977 break;
1978 default:
1980 return signal(sig, handler);
1981 }
1982 return old;
1984}
1985#undef raise
1987int mingw_raise(int sig)
1988{
1989 switch (sig) {
1990 case SIGALRM:
1991 if (timer_fn == SIG_DFL) {
1992 if (isatty(STDERR_FILENO))
1993 fputs("Alarm clock\n", stderr);
1994 exit(128 + SIGALRM);
1995 } else if (timer_fn != SIG_IGN)
1996 timer_fn(SIGALRM);
1997 return 0;
1998 case SIGINT:
2000 if (sigint_fn == SIG_DFL)
2001 exit(128 + SIGINT);
2002 else if (sigint_fn != SIG_IGN)
2003 sigint_fn(SIGINT);
2004 return 0;
2005 default:
2007 return raise(sig);
2008 }
2009}
2010int link(const char *oldpath, const char *newpath)
2012{
2013 typedef BOOL (WINAPI *T)(LPCWSTR, LPCWSTR, LPSECURITY_ATTRIBUTES);
2014 static T create_hard_link = NULL;
2015 wchar_t woldpath[MAX_PATH], wnewpath[MAX_PATH];
2016 if (xutftowcs_path(woldpath, oldpath) < 0 ||
2017 xutftowcs_path(wnewpath, newpath) < 0)
2018 return -1;
2019 if (!create_hard_link) {
2021 create_hard_link = (T) GetProcAddress(
2022 GetModuleHandle("kernel32.dll"), "CreateHardLinkW");
2023 if (!create_hard_link)
2024 create_hard_link = (T)-1;
2025 }
2026 if (create_hard_link == (T)-1) {
2027 errno = ENOSYS;
2028 return -1;
2029 }
2030 if (!create_hard_link(wnewpath, woldpath, NULL)) {
2031 errno = err_win_to_posix(GetLastError());
2032 return -1;
2033 }
2034 return 0;
2035}
2036pid_t waitpid(pid_t pid, int *status, int options)
2038{
2039 HANDLE h = OpenProcess(SYNCHRONIZE | PROCESS_QUERY_INFORMATION,
2040 FALSE, pid);
2041 if (!h) {
2042 errno = ECHILD;
2043 return -1;
2044 }
2045 if (pid > 0 && options & WNOHANG) {
2047 if (WAIT_OBJECT_0 != WaitForSingleObject(h, 0)) {
2048 CloseHandle(h);
2049 return 0;
2050 }
2051 options &= ~WNOHANG;
2052 }
2053 if (options == 0) {
2055 struct pinfo_t **ppinfo;
2056 if (WaitForSingleObject(h, INFINITE) != WAIT_OBJECT_0) {
2057 CloseHandle(h);
2058 return 0;
2059 }
2060 if (status)
2062 GetExitCodeProcess(h, (LPDWORD)status);
2063 EnterCriticalSection(&pinfo_cs);
2065 ppinfo = &pinfo;
2067 while (*ppinfo) {
2068 struct pinfo_t *info = *ppinfo;
2069 if (info->pid == pid) {
2070 CloseHandle(info->proc);
2071 *ppinfo = info->next;
2072 free(info);
2073 break;
2074 }
2075 ppinfo = &info->next;
2076 }
2077 LeaveCriticalSection(&pinfo_cs);
2079 CloseHandle(h);
2081 return pid;
2082 }
2083 CloseHandle(h);
2084 errno = EINVAL;
2086 return -1;
2087}
2088int mingw_skip_dos_drive_prefix(char **path)
2090{
2091 int ret = has_dos_drive_prefix(*path);
2092 *path += ret;
2093 return ret;
2094}
2095int mingw_offset_1st_component(const char *path)
2097{
2098 char *pos = (char *)path;
2099 /* unc paths */
2101 if (!skip_dos_drive_prefix(&pos) &&
2102 is_dir_sep(pos[0]) && is_dir_sep(pos[1])) {
2103 /* skip server name */
2104 pos = strpbrk(pos + 2, "\\/");
2105 if (!pos)
2106 return 0; /* Error: malformed unc path */
2107 do {
2109 pos++;
2110 } while (*pos && !is_dir_sep(*pos));
2111 }
2112 return pos + is_dir_sep(*pos) - path;
2114}
2115int xutftowcsn(wchar_t *wcs, const char *utfs, size_t wcslen, int utflen)
2117{
2118 int upos = 0, wpos = 0;
2119 const unsigned char *utf = (const unsigned char*) utfs;
2120 if (!utf || !wcs || wcslen < 1) {
2121 errno = EINVAL;
2122 return -1;
2123 }
2124 /* reserve space for \0 */
2125 wcslen--;
2126 if (utflen < 0)
2127 utflen = INT_MAX;
2128 while (upos < utflen) {
2130 int c = utf[upos++] & 0xff;
2131 if (utflen == INT_MAX && c == 0)
2132 break;
2133 if (wpos >= wcslen) {
2135 wcs[wpos] = 0;
2136 errno = ERANGE;
2137 return -1;
2138 }
2139 if (c < 0x80) {
2141 /* ASCII */
2142 wcs[wpos++] = c;
2143 } else if (c >= 0xc2 && c < 0xe0 && upos < utflen &&
2144 (utf[upos] & 0xc0) == 0x80) {
2145 /* 2-byte utf-8 */
2146 c = ((c & 0x1f) << 6);
2147 c |= (utf[upos++] & 0x3f);
2148 wcs[wpos++] = c;
2149 } else if (c >= 0xe0 && c < 0xf0 && upos + 1 < utflen &&
2150 !(c == 0xe0 && utf[upos] < 0xa0) && /* over-long encoding */
2151 (utf[upos] & 0xc0) == 0x80 &&
2152 (utf[upos + 1] & 0xc0) == 0x80) {
2153 /* 3-byte utf-8 */
2154 c = ((c & 0x0f) << 12);
2155 c |= ((utf[upos++] & 0x3f) << 6);
2156 c |= (utf[upos++] & 0x3f);
2157 wcs[wpos++] = c;
2158 } else if (c >= 0xf0 && c < 0xf5 && upos + 2 < utflen &&
2159 wpos + 1 < wcslen &&
2160 !(c == 0xf0 && utf[upos] < 0x90) && /* over-long encoding */
2161 !(c == 0xf4 && utf[upos] >= 0x90) && /* > \u10ffff */
2162 (utf[upos] & 0xc0) == 0x80 &&
2163 (utf[upos + 1] & 0xc0) == 0x80 &&
2164 (utf[upos + 2] & 0xc0) == 0x80) {
2165 /* 4-byte utf-8: convert to \ud8xx \udcxx surrogate pair */
2166 c = ((c & 0x07) << 18);
2167 c |= ((utf[upos++] & 0x3f) << 12);
2168 c |= ((utf[upos++] & 0x3f) << 6);
2169 c |= (utf[upos++] & 0x3f);
2170 c -= 0x10000;
2171 wcs[wpos++] = 0xd800 | (c >> 10);
2172 wcs[wpos++] = 0xdc00 | (c & 0x3ff);
2173 } else if (c >= 0xa0) {
2174 /* invalid utf-8 byte, printable unicode char: convert 1:1 */
2175 wcs[wpos++] = c;
2176 } else {
2177 /* invalid utf-8 byte, non-printable unicode: convert to hex */
2178 static const char *hex = "0123456789abcdef";
2179 wcs[wpos++] = hex[c >> 4];
2180 if (wpos < wcslen)
2181 wcs[wpos++] = hex[c & 0x0f];
2182 }
2183 }
2184 wcs[wpos] = 0;
2185 return wpos;
2186}
2187int xwcstoutf(char *utf, const wchar_t *wcs, size_t utflen)
2189{
2190 if (!wcs || !utf || utflen < 1) {
2191 errno = EINVAL;
2192 return -1;
2193 }
2194 utflen = WideCharToMultiByte(CP_UTF8, 0, wcs, -1, utf, utflen, NULL, NULL);
2195 if (utflen)
2196 return utflen - 1;
2197 errno = ERANGE;
2198 return -1;
2199}
2200static void setup_windows_environment(void)
2202{
2203 char *tmp = getenv("TMPDIR");
2204 /* on Windows it is TMP and TEMP */
2206 if (!tmp) {
2207 if (!(tmp = getenv("TMP")))
2208 tmp = getenv("TEMP");
2209 if (tmp) {
2210 setenv("TMPDIR", tmp, 1);
2211 tmp = getenv("TMPDIR");
2212 }
2213 }
2214 if (tmp) {
2216 /*
2217 * Convert all dir separators to forward slashes,
2218 * to help shell commands called from the Git
2219 * executable (by not mistaking the dir separators
2220 * for escape characters).
2221 */
2222 convert_slashes(tmp);
2223 }
2224 /* simulate TERM to enable auto-color (see color.c) */
2226 if (!getenv("TERM"))
2227 setenv("TERM", "cygwin", 1);
2228}
2229/*
2231 * Disable MSVCRT command line wildcard expansion (__getmainargs called from
2232 * mingw startup code, see init.c in mingw runtime).
2233 */
2234int _CRT_glob = 0;
2235typedef struct {
2237 int newmode;
2238} _startupinfo;
2239extern int __wgetmainargs(int *argc, wchar_t ***argv, wchar_t ***env, int glob,
2241 _startupinfo *si);
2242static NORETURN void die_startup(void)
2244{
2245 fputs("fatal: not enough memory for initialization", stderr);
2246 exit(128);
2247}
2248static void *malloc_startup(size_t size)
2250{
2251 void *result = malloc(size);
2252 if (!result)
2253 die_startup();
2254 return result;
2255}
2256static char *wcstoutfdup_startup(char *buffer, const wchar_t *wcs, size_t len)
2258{
2259 len = xwcstoutf(buffer, wcs, len) + 1;
2260 return memcpy(malloc_startup(len), buffer, len);
2261}
2262static void maybe_redirect_std_handle(const wchar_t *key, DWORD std_id, int fd,
2264 DWORD desired_access, DWORD flags)
2265{
2266 DWORD create_flag = fd ? OPEN_ALWAYS : OPEN_EXISTING;
2267 wchar_t buf[MAX_PATH];
2268 DWORD max = ARRAY_SIZE(buf);
2269 HANDLE handle;
2270 DWORD ret = GetEnvironmentVariableW(key, buf, max);
2271 if (!ret || ret >= max)
2273 return;
2274 /* make sure this does not leak into child processes */
2276 SetEnvironmentVariableW(key, NULL);
2277 if (!wcscmp(buf, L"off")) {
2278 close(fd);
2279 handle = GetStdHandle(std_id);
2280 if (handle != INVALID_HANDLE_VALUE)
2281 CloseHandle(handle);
2282 return;
2283 }
2284 if (std_id == STD_ERROR_HANDLE && !wcscmp(buf, L"2>&1")) {
2285 handle = GetStdHandle(STD_OUTPUT_HANDLE);
2286 if (handle == INVALID_HANDLE_VALUE) {
2287 close(fd);
2288 handle = GetStdHandle(std_id);
2289 if (handle != INVALID_HANDLE_VALUE)
2290 CloseHandle(handle);
2291 } else {
2292 int new_fd = _open_osfhandle((intptr_t)handle, O_BINARY);
2293 SetStdHandle(std_id, handle);
2294 dup2(new_fd, fd);
2295 /* do *not* close the new_fd: that would close stdout */
2296 }
2297 return;
2298 }
2299 handle = CreateFileW(buf, desired_access, 0, NULL, create_flag,
2300 flags, NULL);
2301 if (handle != INVALID_HANDLE_VALUE) {
2302 int new_fd = _open_osfhandle((intptr_t)handle, O_BINARY);
2303 SetStdHandle(std_id, handle);
2304 dup2(new_fd, fd);
2305 close(new_fd);
2306 }
2307}
2308static void maybe_redirect_std_handles(void)
2310{
2311 maybe_redirect_std_handle(L"GIT_REDIRECT_STDIN", STD_INPUT_HANDLE, 0,
2312 GENERIC_READ, FILE_ATTRIBUTE_NORMAL);
2313 maybe_redirect_std_handle(L"GIT_REDIRECT_STDOUT", STD_OUTPUT_HANDLE, 1,
2314 GENERIC_WRITE, FILE_ATTRIBUTE_NORMAL);
2315 maybe_redirect_std_handle(L"GIT_REDIRECT_STDERR", STD_ERROR_HANDLE, 2,
2316 GENERIC_WRITE, FILE_FLAG_NO_BUFFERING);
2317}
2318void mingw_startup(void)
2320{
2321 int i, maxlen, argc;
2322 char *buffer;
2323 wchar_t **wenv, **wargv;
2324 _startupinfo si;
2325 maybe_redirect_std_handles();
2327 /* get wide char arguments and environment */
2329 si.newmode = 0;
2330 if (__wgetmainargs(&argc, &wargv, &wenv, _CRT_glob, &si) < 0)
2331 die_startup();
2332 /* determine size of argv and environ conversion buffer */
2334 maxlen = wcslen(wargv[0]);
2335 for (i = 1; i < argc; i++)
2336 maxlen = max(maxlen, wcslen(wargv[i]));
2337 /* allocate buffer (wchar_t encodes to max 3 UTF-8 bytes) */
2339 maxlen = 3 * maxlen + 1;
2340 buffer = malloc_startup(maxlen);
2341 /* convert command line arguments and environment to UTF-8 */
2343 for (i = 0; i < argc; i++)
2344 __argv[i] = wcstoutfdup_startup(buffer, wargv[i], maxlen);
2345 free(buffer);
2346 /* fix Windows specific environment settings */
2348 setup_windows_environment();
2349 /* initialize critical section for waitpid pinfo_t list */
2351 InitializeCriticalSection(&pinfo_cs);
2352 /* set up default file mode and file modes for stdin/out/err */
2354 _fmode = _O_BINARY;
2355 _setmode(_fileno(stdin), _O_BINARY);
2356 _setmode(_fileno(stdout), _O_BINARY);
2357 _setmode(_fileno(stderr), _O_BINARY);
2358 /* initialize Unicode console */
2360 winansi_init();
2361}
2362int uname(struct utsname *buf)
2364{
2365 unsigned v = (unsigned)GetVersion();
2366 memset(buf, 0, sizeof(*buf));
2367 xsnprintf(buf->sysname, sizeof(buf->sysname), "Windows");
2368 xsnprintf(buf->release, sizeof(buf->release),
2369 "%u.%u", v & 0xff, (v >> 8) & 0xff);
2370 /* assuming NT variants only.. */
2371 xsnprintf(buf->version, sizeof(buf->version),
2372 "%u", (v >> 16) & 0x7fff);
2373 return 0;
2374}