d2e7d86db557685d92492ee8f70d0d3bdf224fce
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}
738static int get_file_info_by_handle(HANDLE hnd, struct stat *buf)
740{
741 BY_HANDLE_FILE_INFORMATION fdata;
742 if (!GetFileInformationByHandle(hnd, &fdata)) {
744 errno = err_win_to_posix(GetLastError());
745 return -1;
746 }
747 buf->st_ino = 0;
749 buf->st_gid = 0;
750 buf->st_uid = 0;
751 buf->st_nlink = 1;
752 buf->st_mode = file_attr_to_st_mode(fdata.dwFileAttributes);
753 buf->st_size = fdata.nFileSizeLow |
754 (((off_t)fdata.nFileSizeHigh)<<32);
755 buf->st_dev = buf->st_rdev = 0; /* not used by Git */
756 buf->st_atime = filetime_to_time_t(&(fdata.ftLastAccessTime));
757 buf->st_mtime = filetime_to_time_t(&(fdata.ftLastWriteTime));
758 buf->st_ctime = filetime_to_time_t(&(fdata.ftCreationTime));
759 return 0;
760}
761int mingw_lstat(const char *file_name, struct stat *buf)
763{
764 return do_stat_internal(0, file_name, buf);
765}
766int mingw_stat(const char *file_name, struct stat *buf)
767{
768 return do_stat_internal(1, file_name, buf);
769}
770int mingw_fstat(int fd, struct stat *buf)
772{
773 HANDLE fh = (HANDLE)_get_osfhandle(fd);
774 if (fh == INVALID_HANDLE_VALUE) {
776 errno = EBADF;
777 return -1;
778 }
779 /* direct non-file handles to MS's fstat() */
780 if (GetFileType(fh) != FILE_TYPE_DISK)
781 return _fstati64(fd, buf);
782 if (!get_file_info_by_handle(fh, buf))
784 return 0;
785 errno = EBADF;
787 return -1;
788}
789static inline void time_t_to_filetime(time_t t, FILETIME *ft)
791{
792 long long winTime = t * 10000000LL + 116444736000000000LL;
793 ft->dwLowDateTime = winTime;
794 ft->dwHighDateTime = winTime >> 32;
795}
796int mingw_utime (const char *file_name, const struct utimbuf *times)
798{
799 FILETIME mft, aft;
800 int fh, rc;
801 DWORD attrs;
802 wchar_t wfilename[MAX_PATH];
803 if (xutftowcs_path(wfilename, file_name) < 0)
804 return -1;
805 /* must have write permission */
807 attrs = GetFileAttributesW(wfilename);
808 if (attrs != INVALID_FILE_ATTRIBUTES &&
809 (attrs & FILE_ATTRIBUTE_READONLY)) {
810 /* ignore errors here; open() will report them */
811 SetFileAttributesW(wfilename, attrs & ~FILE_ATTRIBUTE_READONLY);
812 }
813 if ((fh = _wopen(wfilename, O_RDWR | O_BINARY)) < 0) {
815 rc = -1;
816 goto revert_attrs;
817 }
818 if (times) {
820 time_t_to_filetime(times->modtime, &mft);
821 time_t_to_filetime(times->actime, &aft);
822 } else {
823 GetSystemTimeAsFileTime(&mft);
824 aft = mft;
825 }
826 if (!SetFileTime((HANDLE)_get_osfhandle(fh), NULL, &aft, &mft)) {
827 errno = EINVAL;
828 rc = -1;
829 } else
830 rc = 0;
831 close(fh);
832revert_attrs:
834 if (attrs != INVALID_FILE_ATTRIBUTES &&
835 (attrs & FILE_ATTRIBUTE_READONLY)) {
836 /* ignore errors again */
837 SetFileAttributesW(wfilename, attrs);
838 }
839 return rc;
840}
841#undef strftime
843size_t mingw_strftime(char *s, size_t max,
844 const char *format, const struct tm *tm)
845{
846 size_t ret = strftime(s, max, format, tm);
847 if (!ret && errno == EINVAL)
849 die("invalid strftime format: '%s'", format);
850 return ret;
851}
852unsigned int sleep (unsigned int seconds)
854{
855 Sleep(seconds*1000);
856 return 0;
857}
858char *mingw_mktemp(char *template)
860{
861 wchar_t wtemplate[MAX_PATH];
862 if (xutftowcs_path(wtemplate, template) < 0)
863 return NULL;
864 if (!_wmktemp(wtemplate))
865 return NULL;
866 if (xwcstoutf(template, wtemplate, strlen(template) + 1) < 0)
867 return NULL;
868 return template;
869}
870int mkstemp(char *template)
872{
873 char *filename = mktemp(template);
874 if (filename == NULL)
875 return -1;
876 return open(filename, O_RDWR | O_CREAT, 0600);
877}
878int gettimeofday(struct timeval *tv, void *tz)
880{
881 FILETIME ft;
882 long long hnsec;
883 GetSystemTimeAsFileTime(&ft);
885 hnsec = filetime_to_hnsec(&ft);
886 tv->tv_sec = hnsec / 10000000;
887 tv->tv_usec = (hnsec % 10000000) / 10;
888 return 0;
889}
890int pipe(int filedes[2])
892{
893 HANDLE h[2];
894 /* this creates non-inheritable handles */
896 if (!CreatePipe(&h[0], &h[1], NULL, 8192)) {
897 errno = err_win_to_posix(GetLastError());
898 return -1;
899 }
900 filedes[0] = _open_osfhandle(HCAST(int, h[0]), O_NOINHERIT);
901 if (filedes[0] < 0) {
902 CloseHandle(h[0]);
903 CloseHandle(h[1]);
904 return -1;
905 }
906 filedes[1] = _open_osfhandle(HCAST(int, h[1]), O_NOINHERIT);
907 if (filedes[1] < 0) {
908 close(filedes[0]);
909 CloseHandle(h[1]);
910 return -1;
911 }
912 return 0;
913}
914struct tm *gmtime_r(const time_t *timep, struct tm *result)
916{
917 /* gmtime() in MSVCRT.DLL is thread-safe, but not reentrant */
918 memcpy(result, gmtime(timep), sizeof(struct tm));
919 return result;
920}
921struct tm *localtime_r(const time_t *timep, struct tm *result)
923{
924 /* localtime() in MSVCRT.DLL is thread-safe, but not reentrant */
925 memcpy(result, localtime(timep), sizeof(struct tm));
926 return result;
927}
928char *mingw_getcwd(char *pointer, int len)
930{
931 wchar_t wpointer[MAX_PATH];
932 if (!_wgetcwd(wpointer, ARRAY_SIZE(wpointer)))
933 return NULL;
934 if (xwcstoutf(pointer, wpointer, len) < 0)
935 return NULL;
936 convert_slashes(pointer);
937 return pointer;
938}
939/*
941 * See http://msdn2.microsoft.com/en-us/library/17w5ykft(vs.71).aspx
942 * (Parsing C++ Command-Line Arguments)
943 */
944static const char *quote_arg(const char *arg)
945{
946 /* count chars to quote */
947 int len = 0, n = 0;
948 int force_quotes = 0;
949 char *q, *d;
950 const char *p = arg;
951 if (!*p) force_quotes = 1;
952 while (*p) {
953 if (isspace(*p) || *p == '*' || *p == '?' || *p == '{' || *p == '\'')
954 force_quotes = 1;
955 else if (*p == '"')
956 n++;
957 else if (*p == '\\') {
958 int count = 0;
959 while (*p == '\\') {
960 count++;
961 p++;
962 len++;
963 }
964 if (*p == '"')
965 n += count*2 + 1;
966 continue;
967 }
968 len++;
969 p++;
970 }
971 if (!force_quotes && n == 0)
972 return arg;
973 /* insert \ where necessary */
975 d = q = xmalloc(st_add3(len, n, 3));
976 *d++ = '"';
977 while (*arg) {
978 if (*arg == '"')
979 *d++ = '\\';
980 else if (*arg == '\\') {
981 int count = 0;
982 while (*arg == '\\') {
983 count++;
984 *d++ = *arg++;
985 }
986 if (*arg == '"') {
987 while (count-- > 0)
988 *d++ = '\\';
989 *d++ = '\\';
990 }
991 }
992 *d++ = *arg++;
993 }
994 *d++ = '"';
995 *d++ = 0;
996 return q;
997}
998static const char *parse_interpreter(const char *cmd)
1000{
1001 static char buf[100];
1002 char *p, *opt;
1003 int n, fd;
1004 /* don't even try a .exe */
1006 n = strlen(cmd);
1007 if (n >= 4 && !strcasecmp(cmd+n-4, ".exe"))
1008 return NULL;
1009 fd = open(cmd, O_RDONLY);
1011 if (fd < 0)
1012 return NULL;
1013 n = read(fd, buf, sizeof(buf)-1);
1014 close(fd);
1015 if (n < 4) /* at least '#!/x' and not error */
1016 return NULL;
1017 if (buf[0] != '#' || buf[1] != '!')
1019 return NULL;
1020 buf[n] = '\0';
1021 p = buf + strcspn(buf, "\r\n");
1022 if (!*p)
1023 return NULL;
1024 *p = '\0';
1026 if (!(p = strrchr(buf+2, '/')) && !(p = strrchr(buf+2, '\\')))
1027 return NULL;
1028 /* strip options */
1029 if ((opt = strchr(p+1, ' ')))
1030 *opt = '\0';
1031 return p+1;
1032}
1033/*
1035 * exe_only means that we only want to detect .exe files, but not scripts
1036 * (which do not have an extension)
1037 */
1038static char *lookup_prog(const char *dir, int dirlen, const char *cmd,
1039 int isexe, int exe_only)
1040{
1041 char path[MAX_PATH];
1042 snprintf(path, sizeof(path), "%.*s\\%s.exe", dirlen, dir, cmd);
1043 if (!isexe && access(path, F_OK) == 0)
1045 return xstrdup(path);
1046 path[strlen(path)-4] = '\0';
1047 if ((!exe_only || isexe) && access(path, F_OK) == 0)
1048 if (!(GetFileAttributes(path) & FILE_ATTRIBUTE_DIRECTORY))
1049 return xstrdup(path);
1050 return NULL;
1051}
1052/*
1054 * Determines the absolute path of cmd using the split path in path.
1055 * If cmd contains a slash or backslash, no lookup is performed.
1056 */
1057static char *path_lookup(const char *cmd, int exe_only)
1058{
1059 const char *path;
1060 char *prog = NULL;
1061 int len = strlen(cmd);
1062 int isexe = len >= 4 && !strcasecmp(cmd+len-4, ".exe");
1063 if (strchr(cmd, '/') || strchr(cmd, '\\'))
1065 return xstrdup(cmd);
1066 path = mingw_getenv("PATH");
1068 if (!path)
1069 return NULL;
1070 while (!prog) {
1072 const char *sep = strchrnul(path, ';');
1073 int dirlen = sep - path;
1074 if (dirlen)
1075 prog = lookup_prog(path, dirlen, cmd, isexe, exe_only);
1076 if (!*sep)
1077 break;
1078 path = sep + 1;
1079 }
1080 return prog;
1082}
1083static int do_putenv(char **env, const char *name, int size, int free_old);
1085/* used number of elements of environ array, including terminating NULL */
1087static int environ_size = 0;
1088/* allocated size of environ array, in bytes */
1089static int environ_alloc = 0;
1090/*
1092 * Create environment block suitable for CreateProcess. Merges current
1093 * process environment and the supplied environment changes.
1094 */
1095static wchar_t *make_environment_block(char **deltaenv)
1096{
1097 wchar_t *wenvblk = NULL;
1098 char **tmpenv;
1099 int i = 0, size = environ_size, wenvsz = 0, wenvpos = 0;
1100 while (deltaenv && deltaenv[i])
1102 i++;
1103 /* copy the environment, leaving space for changes */
1105 ALLOC_ARRAY(tmpenv, size + i);
1106 memcpy(tmpenv, environ, size * sizeof(char*));
1107 /* merge supplied environment changes into the temporary environment */
1109 for (i = 0; deltaenv && deltaenv[i]; i++)
1110 size = do_putenv(tmpenv, deltaenv[i], size, 0);
1111 /* create environment block from temporary environment */
1113 for (i = 0; tmpenv[i]; i++) {
1114 size = 2 * strlen(tmpenv[i]) + 2; /* +2 for final \0 */
1115 ALLOC_GROW(wenvblk, (wenvpos + size) * sizeof(wchar_t), wenvsz);
1116 wenvpos += xutftowcs(&wenvblk[wenvpos], tmpenv[i], size) + 1;
1117 }
1118 /* add final \0 terminator */
1119 wenvblk[wenvpos] = 0;
1120 free(tmpenv);
1121 return wenvblk;
1122}
1123struct pinfo_t {
1125 struct pinfo_t *next;
1126 pid_t pid;
1127 HANDLE proc;
1128};
1129static struct pinfo_t *pinfo = NULL;
1130CRITICAL_SECTION pinfo_cs;
1131static pid_t mingw_spawnve_fd(const char *cmd, const char **argv, char **deltaenv,
1133 const char *dir,
1134 int prepend_cmd, int fhin, int fhout, int fherr)
1135{
1136 STARTUPINFOW si;
1137 PROCESS_INFORMATION pi;
1138 struct strbuf args;
1139 wchar_t wcmd[MAX_PATH], wdir[MAX_PATH], *wargs, *wenvblk = NULL;
1140 unsigned flags = CREATE_UNICODE_ENVIRONMENT;
1141 BOOL ret;
1142 /* Determine whether or not we are associated to a console */
1144 HANDLE cons = CreateFile("CONOUT$", GENERIC_WRITE,
1145 FILE_SHARE_WRITE, NULL, OPEN_EXISTING,
1146 FILE_ATTRIBUTE_NORMAL, NULL);
1147 if (cons == INVALID_HANDLE_VALUE) {
1148 /* There is no console associated with this process.
1149 * Since the child is a console process, Windows
1150 * would normally create a console window. But
1151 * since we'll be redirecting std streams, we do
1152 * not need the console.
1153 * It is necessary to use DETACHED_PROCESS
1154 * instead of CREATE_NO_WINDOW to make ssh
1155 * recognize that it has no console.
1156 */
1157 flags |= DETACHED_PROCESS;
1158 } else {
1159 /* There is already a console. If we specified
1160 * DETACHED_PROCESS here, too, Windows would
1161 * disassociate the child from the console.
1162 * The same is true for CREATE_NO_WINDOW.
1163 * Go figure!
1164 */
1165 CloseHandle(cons);
1166 }
1167 memset(&si, 0, sizeof(si));
1168 si.cb = sizeof(si);
1169 si.dwFlags = STARTF_USESTDHANDLES;
1170 si.hStdInput = winansi_get_osfhandle(fhin);
1171 si.hStdOutput = winansi_get_osfhandle(fhout);
1172 si.hStdError = winansi_get_osfhandle(fherr);
1173 if (xutftowcs_path(wcmd, cmd) < 0)
1175 return -1;
1176 if (dir && xutftowcs_path(wdir, dir) < 0)
1177 return -1;
1178 /* concatenate argv, quoting args as we go */
1180 strbuf_init(&args, 0);
1181 if (prepend_cmd) {
1182 char *quoted = (char *)quote_arg(cmd);
1183 strbuf_addstr(&args, quoted);
1184 if (quoted != cmd)
1185 free(quoted);
1186 }
1187 for (; *argv; argv++) {
1188 char *quoted = (char *)quote_arg(*argv);
1189 if (*args.buf)
1190 strbuf_addch(&args, ' ');
1191 strbuf_addstr(&args, quoted);
1192 if (quoted != *argv)
1193 free(quoted);
1194 }
1195 ALLOC_ARRAY(wargs, st_add(st_mult(2, args.len), 1));
1197 xutftowcs(wargs, args.buf, 2 * args.len + 1);
1198 strbuf_release(&args);
1199 wenvblk = make_environment_block(deltaenv);
1201 memset(&pi, 0, sizeof(pi));
1203 ret = CreateProcessW(wcmd, wargs, NULL, NULL, TRUE, flags,
1204 wenvblk, dir ? wdir : NULL, &si, &pi);
1205 free(wenvblk);
1207 free(wargs);
1208 if (!ret) {
1210 errno = ENOENT;
1211 return -1;
1212 }
1213 CloseHandle(pi.hThread);
1214 /*
1216 * The process ID is the human-readable identifier of the process
1217 * that we want to present in log and error messages. The handle
1218 * is not useful for this purpose. But we cannot close it, either,
1219 * because it is not possible to turn a process ID into a process
1220 * handle after the process terminated.
1221 * Keep the handle in a list for waitpid.
1222 */
1223 EnterCriticalSection(&pinfo_cs);
1224 {
1225 struct pinfo_t *info = xmalloc(sizeof(struct pinfo_t));
1226 info->pid = pi.dwProcessId;
1227 info->proc = pi.hProcess;
1228 info->next = pinfo;
1229 pinfo = info;
1230 }
1231 LeaveCriticalSection(&pinfo_cs);
1232 return (pid_t)pi.dwProcessId;
1234}
1235static pid_t mingw_spawnv(const char *cmd, const char **argv, int prepend_cmd)
1237{
1238 return mingw_spawnve_fd(cmd, argv, NULL, NULL, prepend_cmd, 0, 1, 2);
1239}
1240pid_t mingw_spawnvpe(const char *cmd, const char **argv, char **deltaenv,
1242 const char *dir,
1243 int fhin, int fhout, int fherr)
1244{
1245 pid_t pid;
1246 char *prog = path_lookup(cmd, 0);
1247 if (!prog) {
1249 errno = ENOENT;
1250 pid = -1;
1251 }
1252 else {
1253 const char *interpr = parse_interpreter(prog);
1254 if (interpr) {
1256 const char *argv0 = argv[0];
1257 char *iprog = path_lookup(interpr, 1);
1258 argv[0] = prog;
1259 if (!iprog) {
1260 errno = ENOENT;
1261 pid = -1;
1262 }
1263 else {
1264 pid = mingw_spawnve_fd(iprog, argv, deltaenv, dir, 1,
1265 fhin, fhout, fherr);
1266 free(iprog);
1267 }
1268 argv[0] = argv0;
1269 }
1270 else
1271 pid = mingw_spawnve_fd(prog, argv, deltaenv, dir, 0,
1272 fhin, fhout, fherr);
1273 free(prog);
1274 }
1275 return pid;
1276}
1277static int try_shell_exec(const char *cmd, char *const *argv)
1279{
1280 const char *interpr = parse_interpreter(cmd);
1281 char *prog;
1282 int pid = 0;
1283 if (!interpr)
1285 return 0;
1286 prog = path_lookup(interpr, 1);
1287 if (prog) {
1288 int argc = 0;
1289 const char **argv2;
1290 while (argv[argc]) argc++;
1291 ALLOC_ARRAY(argv2, argc + 1);
1292 argv2[0] = (char *)cmd; /* full path to the script file */
1293 memcpy(&argv2[1], &argv[1], sizeof(*argv) * argc);
1294 pid = mingw_spawnv(prog, argv2, 1);
1295 if (pid >= 0) {
1296 int status;
1297 if (waitpid(pid, &status, 0) < 0)
1298 status = 255;
1299 exit(status);
1300 }
1301 pid = 1; /* indicate that we tried but failed */
1302 free(prog);
1303 free(argv2);
1304 }
1305 return pid;
1306}
1307int mingw_execv(const char *cmd, char *const *argv)
1309{
1310 /* check if git_command is a shell script */
1311 if (!try_shell_exec(cmd, argv)) {
1312 int pid, status;
1313 pid = mingw_spawnv(cmd, (const char **)argv, 0);
1315 if (pid < 0)
1316 return -1;
1317 if (waitpid(pid, &status, 0) < 0)
1318 status = 255;
1319 exit(status);
1320 }
1321 return -1;
1322}
1323int mingw_execvp(const char *cmd, char *const *argv)
1325{
1326 char *prog = path_lookup(cmd, 0);
1327 if (prog) {
1329 mingw_execv(prog, argv);
1330 free(prog);
1331 } else
1332 errno = ENOENT;
1333 return -1;
1335}
1336int mingw_kill(pid_t pid, int sig)
1338{
1339 if (pid > 0 && sig == SIGTERM) {
1340 HANDLE h = OpenProcess(PROCESS_TERMINATE, FALSE, pid);
1341 if (TerminateProcess(h, -1)) {
1343 CloseHandle(h);
1344 return 0;
1345 }
1346 errno = err_win_to_posix(GetLastError());
1348 CloseHandle(h);
1349 return -1;
1350 } else if (pid > 0 && sig == 0) {
1351 HANDLE h = OpenProcess(PROCESS_QUERY_INFORMATION, FALSE, pid);
1352 if (h) {
1353 CloseHandle(h);
1354 return 0;
1355 }
1356 }
1357 errno = EINVAL;
1359 return -1;
1360}
1361/*
1363 * Compare environment entries by key (i.e. stopping at '=' or '\0').
1364 */
1365static int compareenv(const void *v1, const void *v2)
1366{
1367 const char *e1 = *(const char**)v1;
1368 const char *e2 = *(const char**)v2;
1369 for (;;) {
1371 int c1 = *e1++;
1372 int c2 = *e2++;
1373 c1 = (c1 == '=') ? 0 : tolower(c1);
1374 c2 = (c2 == '=') ? 0 : tolower(c2);
1375 if (c1 > c2)
1376 return 1;
1377 if (c1 < c2)
1378 return -1;
1379 if (c1 == 0)
1380 return 0;
1381 }
1382}
1383static int bsearchenv(char **env, const char *name, size_t size)
1385{
1386 unsigned low = 0, high = size;
1387 while (low < high) {
1388 unsigned mid = low + ((high - low) >> 1);
1389 int cmp = compareenv(&env[mid], &name);
1390 if (cmp < 0)
1391 low = mid + 1;
1392 else if (cmp > 0)
1393 high = mid;
1394 else
1395 return mid;
1396 }
1397 return ~low; /* not found, return 1's complement of insert position */
1398}
1399/*
1401 * If name contains '=', then sets the variable, otherwise it unsets it
1402 * Size includes the terminating NULL. Env must have room for size + 1 entries
1403 * (in case of insert). Returns the new size. Optionally frees removed entries.
1404 */
1405static int do_putenv(char **env, const char *name, int size, int free_old)
1406{
1407 int i = bsearchenv(env, name, size - 1);
1408 /* optionally free removed / replaced entry */
1410 if (i >= 0 && free_old)
1411 free(env[i]);
1412 if (strchr(name, '=')) {
1414 /* if new value ('key=value') is specified, insert or replace entry */
1415 if (i < 0) {
1416 i = ~i;
1417 memmove(&env[i + 1], &env[i], (size - i) * sizeof(char*));
1418 size++;
1419 }
1420 env[i] = (char*) name;
1421 } else if (i >= 0) {
1422 /* otherwise ('key') remove existing entry */
1423 size--;
1424 memmove(&env[i], &env[i + 1], (size - i) * sizeof(char*));
1425 }
1426 return size;
1427}
1428char *mingw_getenv(const char *name)
1430{
1431 char *value;
1432 int pos = bsearchenv(environ, name, environ_size - 1);
1433 if (pos < 0)
1434 return NULL;
1435 value = strchr(environ[pos], '=');
1436 return value ? &value[1] : NULL;
1437}
1438int mingw_putenv(const char *namevalue)
1440{
1441 ALLOC_GROW(environ, (environ_size + 1) * sizeof(char*), environ_alloc);
1442 environ_size = do_putenv(environ, namevalue, environ_size, 1);
1443 return 0;
1444}
1445/*
1447 * Note, this isn't a complete replacement for getaddrinfo. It assumes
1448 * that service contains a numerical port, or that it is null. It
1449 * does a simple search using gethostbyname, and returns one IPv4 host
1450 * if one was found.
1451 */
1452static int WSAAPI getaddrinfo_stub(const char *node, const char *service,
1453 const struct addrinfo *hints,
1454 struct addrinfo **res)
1455{
1456 struct hostent *h = NULL;
1457 struct addrinfo *ai;
1458 struct sockaddr_in *sin;
1459 if (node) {
1461 h = gethostbyname(node);
1462 if (!h)
1463 return WSAGetLastError();
1464 }
1465 ai = xmalloc(sizeof(struct addrinfo));
1467 *res = ai;
1468 ai->ai_flags = 0;
1469 ai->ai_family = AF_INET;
1470 ai->ai_socktype = hints ? hints->ai_socktype : 0;
1471 switch (ai->ai_socktype) {
1472 case SOCK_STREAM:
1473 ai->ai_protocol = IPPROTO_TCP;
1474 break;
1475 case SOCK_DGRAM:
1476 ai->ai_protocol = IPPROTO_UDP;
1477 break;
1478 default:
1479 ai->ai_protocol = 0;
1480 break;
1481 }
1482 ai->ai_addrlen = sizeof(struct sockaddr_in);
1483 if (hints && (hints->ai_flags & AI_CANONNAME))
1484 ai->ai_canonname = h ? xstrdup(h->h_name) : NULL;
1485 else
1486 ai->ai_canonname = NULL;
1487 sin = xcalloc(1, ai->ai_addrlen);
1489 sin->sin_family = AF_INET;
1490 /* Note: getaddrinfo is supposed to allow service to be a string,
1491 * which should be looked up using getservbyname. This is
1492 * currently not implemented */
1493 if (service)
1494 sin->sin_port = htons(atoi(service));
1495 if (h)
1496 sin->sin_addr = *(struct in_addr *)h->h_addr;
1497 else if (hints && (hints->ai_flags & AI_PASSIVE))
1498 sin->sin_addr.s_addr = INADDR_ANY;
1499 else
1500 sin->sin_addr.s_addr = INADDR_LOOPBACK;
1501 ai->ai_addr = (struct sockaddr *)sin;
1502 ai->ai_next = NULL;
1503 return 0;
1504}
1505static void WSAAPI freeaddrinfo_stub(struct addrinfo *res)
1507{
1508 free(res->ai_canonname);
1509 free(res->ai_addr);
1510 free(res);
1511}
1512static int WSAAPI getnameinfo_stub(const struct sockaddr *sa, socklen_t salen,
1514 char *host, DWORD hostlen,
1515 char *serv, DWORD servlen, int flags)
1516{
1517 const struct sockaddr_in *sin = (const struct sockaddr_in *)sa;
1518 if (sa->sa_family != AF_INET)
1519 return EAI_FAMILY;
1520 if (!host && !serv)
1521 return EAI_NONAME;
1522 if (host && hostlen > 0) {
1524 struct hostent *ent = NULL;
1525 if (!(flags & NI_NUMERICHOST))
1526 ent = gethostbyaddr((const char *)&sin->sin_addr,
1527 sizeof(sin->sin_addr), AF_INET);
1528 if (ent)
1530 snprintf(host, hostlen, "%s", ent->h_name);
1531 else if (flags & NI_NAMEREQD)
1532 return EAI_NONAME;
1533 else
1534 snprintf(host, hostlen, "%s", inet_ntoa(sin->sin_addr));
1535 }
1536 if (serv && servlen > 0) {
1538 struct servent *ent = NULL;
1539 if (!(flags & NI_NUMERICSERV))
1540 ent = getservbyport(sin->sin_port,
1541 flags & NI_DGRAM ? "udp" : "tcp");
1542 if (ent)
1544 snprintf(serv, servlen, "%s", ent->s_name);
1545 else
1546 snprintf(serv, servlen, "%d", ntohs(sin->sin_port));
1547 }
1548 return 0;
1550}
1551static HMODULE ipv6_dll = NULL;
1553static void (WSAAPI *ipv6_freeaddrinfo)(struct addrinfo *res);
1554static int (WSAAPI *ipv6_getaddrinfo)(const char *node, const char *service,
1555 const struct addrinfo *hints,
1556 struct addrinfo **res);
1557static int (WSAAPI *ipv6_getnameinfo)(const struct sockaddr *sa, socklen_t salen,
1558 char *host, DWORD hostlen,
1559 char *serv, DWORD servlen, int flags);
1560/*
1561 * gai_strerror is an inline function in the ws2tcpip.h header, so we
1562 * don't need to try to load that one dynamically.
1563 */
1564static void socket_cleanup(void)
1566{
1567 WSACleanup();
1568 if (ipv6_dll)
1569 FreeLibrary(ipv6_dll);
1570 ipv6_dll = NULL;
1571 ipv6_freeaddrinfo = freeaddrinfo_stub;
1572 ipv6_getaddrinfo = getaddrinfo_stub;
1573 ipv6_getnameinfo = getnameinfo_stub;
1574}
1575static void ensure_socket_initialization(void)
1577{
1578 WSADATA wsa;
1579 static int initialized = 0;
1580 const char *libraries[] = { "ws2_32.dll", "wship6.dll", NULL };
1581 const char **name;
1582 if (initialized)
1584 return;
1585 if (WSAStartup(MAKEWORD(2,2), &wsa))
1587 die("unable to initialize winsock subsystem, error %d",
1588 WSAGetLastError());
1589 for (name = libraries; *name; name++) {
1591 ipv6_dll = LoadLibrary(*name);
1592 if (!ipv6_dll)
1593 continue;
1594 ipv6_freeaddrinfo = (void (WSAAPI *)(struct addrinfo *))
1596 GetProcAddress(ipv6_dll, "freeaddrinfo");
1597 ipv6_getaddrinfo = (int (WSAAPI *)(const char *, const char *,
1598 const struct addrinfo *,
1599 struct addrinfo **))
1600 GetProcAddress(ipv6_dll, "getaddrinfo");
1601 ipv6_getnameinfo = (int (WSAAPI *)(const struct sockaddr *,
1602 socklen_t, char *, DWORD,
1603 char *, DWORD, int))
1604 GetProcAddress(ipv6_dll, "getnameinfo");
1605 if (!ipv6_freeaddrinfo || !ipv6_getaddrinfo || !ipv6_getnameinfo) {
1606 FreeLibrary(ipv6_dll);
1607 ipv6_dll = NULL;
1608 } else
1609 break;
1610 }
1611 if (!ipv6_freeaddrinfo || !ipv6_getaddrinfo || !ipv6_getnameinfo) {
1612 ipv6_freeaddrinfo = freeaddrinfo_stub;
1613 ipv6_getaddrinfo = getaddrinfo_stub;
1614 ipv6_getnameinfo = getnameinfo_stub;
1615 }
1616 atexit(socket_cleanup);
1618 initialized = 1;
1619}
1620#undef gethostname
1622int mingw_gethostname(char *name, int namelen)
1623{
1624 ensure_socket_initialization();
1625 return gethostname(name, namelen);
1626}
1627#undef gethostbyname
1629struct hostent *mingw_gethostbyname(const char *host)
1630{
1631 ensure_socket_initialization();
1632 return gethostbyname(host);
1633}
1634void mingw_freeaddrinfo(struct addrinfo *res)
1636{
1637 ipv6_freeaddrinfo(res);
1638}
1639int mingw_getaddrinfo(const char *node, const char *service,
1641 const struct addrinfo *hints, struct addrinfo **res)
1642{
1643 ensure_socket_initialization();
1644 return ipv6_getaddrinfo(node, service, hints, res);
1645}
1646int mingw_getnameinfo(const struct sockaddr *sa, socklen_t salen,
1648 char *host, DWORD hostlen, char *serv, DWORD servlen,
1649 int flags)
1650{
1651 ensure_socket_initialization();
1652 return ipv6_getnameinfo(sa, salen, host, hostlen, serv, servlen, flags);
1653}
1654int mingw_socket(int domain, int type, int protocol)
1656{
1657 int sockfd;
1658 SOCKET s;
1659 ensure_socket_initialization();
1661 s = WSASocket(domain, type, protocol, NULL, 0, 0);
1662 if (s == INVALID_SOCKET) {
1663 /*
1664 * WSAGetLastError() values are regular BSD error codes
1665 * biased by WSABASEERR.
1666 * However, strerror() does not know about networking
1667 * specific errors, which are values beginning at 38 or so.
1668 * Therefore, we choose to leave the biased error code
1669 * in errno so that _if_ someone looks up the code somewhere,
1670 * then it is at least the number that are usually listed.
1671 */
1672 errno = WSAGetLastError();
1673 return -1;
1674 }
1675 /* convert into a file descriptor */
1676 if ((sockfd = _open_osfhandle(s, O_RDWR|O_BINARY)) < 0) {
1677 closesocket(s);
1678 return error("unable to make a socket file descriptor: %s",
1679 strerror(errno));
1680 }
1681 return sockfd;
1682}
1683#undef connect
1685int mingw_connect(int sockfd, struct sockaddr *sa, size_t sz)
1686{
1687 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
1688 return connect(s, sa, sz);
1689}
1690#undef bind
1692int mingw_bind(int sockfd, struct sockaddr *sa, size_t sz)
1693{
1694 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
1695 return bind(s, sa, sz);
1696}
1697#undef setsockopt
1699int mingw_setsockopt(int sockfd, int lvl, int optname, void *optval, int optlen)
1700{
1701 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
1702 return setsockopt(s, lvl, optname, (const char*)optval, optlen);
1703}
1704#undef shutdown
1706int mingw_shutdown(int sockfd, int how)
1707{
1708 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
1709 return shutdown(s, how);
1710}
1711#undef listen
1713int mingw_listen(int sockfd, int backlog)
1714{
1715 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
1716 return listen(s, backlog);
1717}
1718#undef accept
1720int mingw_accept(int sockfd1, struct sockaddr *sa, socklen_t *sz)
1721{
1722 int sockfd2;
1723 SOCKET s1 = (SOCKET)_get_osfhandle(sockfd1);
1725 SOCKET s2 = accept(s1, sa, sz);
1726 /* convert into a file descriptor */
1728 if ((sockfd2 = _open_osfhandle(s2, O_RDWR|O_BINARY)) < 0) {
1729 int err = errno;
1730 closesocket(s2);
1731 return error("unable to make a socket file descriptor: %s",
1732 strerror(err));
1733 }
1734 return sockfd2;
1735}
1736#undef rename
1738int mingw_rename(const char *pold, const char *pnew)
1739{
1740 DWORD attrs, gle;
1741 int tries = 0;
1742 wchar_t wpold[MAX_PATH], wpnew[MAX_PATH];
1743 if (xutftowcs_path(wpold, pold) < 0 || xutftowcs_path(wpnew, pnew) < 0)
1744 return -1;
1745 /*
1747 * Try native rename() first to get errno right.
1748 * It is based on MoveFile(), which cannot overwrite existing files.
1749 */
1750 if (!_wrename(wpold, wpnew))
1751 return 0;
1752 if (errno != EEXIST)
1753 return -1;
1754repeat:
1755 if (MoveFileExW(wpold, wpnew, MOVEFILE_REPLACE_EXISTING))
1756 return 0;
1757 /* TODO: translate more errors */
1758 gle = GetLastError();
1759 if (gle == ERROR_ACCESS_DENIED &&
1760 (attrs = GetFileAttributesW(wpnew)) != INVALID_FILE_ATTRIBUTES) {
1761 if (attrs & FILE_ATTRIBUTE_DIRECTORY) {
1762 DWORD attrsold = GetFileAttributesW(wpold);
1763 if (attrsold == INVALID_FILE_ATTRIBUTES ||
1764 !(attrsold & FILE_ATTRIBUTE_DIRECTORY))
1765 errno = EISDIR;
1766 else if (!_wrmdir(wpnew))
1767 goto repeat;
1768 return -1;
1769 }
1770 if ((attrs & FILE_ATTRIBUTE_READONLY) &&
1771 SetFileAttributesW(wpnew, attrs & ~FILE_ATTRIBUTE_READONLY)) {
1772 if (MoveFileExW(wpold, wpnew, MOVEFILE_REPLACE_EXISTING))
1773 return 0;
1774 gle = GetLastError();
1775 /* revert file attributes on failure */
1776 SetFileAttributesW(wpnew, attrs);
1777 }
1778 }
1779 if (tries < ARRAY_SIZE(delay) && gle == ERROR_ACCESS_DENIED) {
1780 /*
1781 * We assume that some other process had the source or
1782 * destination file open at the wrong moment and retry.
1783 * In order to give the other process a higher chance to
1784 * complete its operation, we give up our time slice now.
1785 * If we have to retry again, we do sleep a bit.
1786 */
1787 Sleep(delay[tries]);
1788 tries++;
1789 goto repeat;
1790 }
1791 if (gle == ERROR_ACCESS_DENIED &&
1792 ask_yes_no_if_possible("Rename from '%s' to '%s' failed. "
1793 "Should I try again?", pold, pnew))
1794 goto repeat;
1795 errno = EACCES;
1797 return -1;
1798}
1799/*
1801 * Note that this doesn't return the actual pagesize, but
1802 * the allocation granularity. If future Windows specific git code
1803 * needs the real getpagesize function, we need to find another solution.
1804 */
1805int mingw_getpagesize(void)
1806{
1807 SYSTEM_INFO si;
1808 GetSystemInfo(&si);
1809 return si.dwAllocationGranularity;
1810}
1811struct passwd *getpwuid(int uid)
1813{
1814 static char user_name[100];
1815 static struct passwd p;
1816 DWORD len = sizeof(user_name);
1818 if (!GetUserName(user_name, &len))
1819 return NULL;
1820 p.pw_name = user_name;
1821 p.pw_gecos = "unknown";
1822 p.pw_dir = NULL;
1823 return &p;
1824}
1825static HANDLE timer_event;
1827static HANDLE timer_thread;
1828static int timer_interval;
1829static int one_shot;
1830static sig_handler_t timer_fn = SIG_DFL, sigint_fn = SIG_DFL;
1831/* The timer works like this:
1833 * The thread, ticktack(), is a trivial routine that most of the time
1834 * only waits to receive the signal to terminate. The main thread tells
1835 * the thread to terminate by setting the timer_event to the signalled
1836 * state.
1837 * But ticktack() interrupts the wait state after the timer's interval
1838 * length to call the signal handler.
1839 */
1840static unsigned __stdcall ticktack(void *dummy)
1842{
1843 while (WaitForSingleObject(timer_event, timer_interval) == WAIT_TIMEOUT) {
1844 mingw_raise(SIGALRM);
1845 if (one_shot)
1846 break;
1847 }
1848 return 0;
1849}
1850static int start_timer_thread(void)
1852{
1853 timer_event = CreateEvent(NULL, FALSE, FALSE, NULL);
1854 if (timer_event) {
1855 timer_thread = (HANDLE) _beginthreadex(NULL, 0, ticktack, NULL, 0, NULL);
1856 if (!timer_thread )
1857 return errno = ENOMEM,
1858 error("cannot start timer thread");
1859 } else
1860 return errno = ENOMEM,
1861 error("cannot allocate resources for timer");
1862 return 0;
1863}
1864static void stop_timer_thread(void)
1866{
1867 if (timer_event)
1868 SetEvent(timer_event); /* tell thread to terminate */
1869 if (timer_thread) {
1870 int rc = WaitForSingleObject(timer_thread, 1000);
1871 if (rc == WAIT_TIMEOUT)
1872 error("timer thread did not terminate timely");
1873 else if (rc != WAIT_OBJECT_0)
1874 error("waiting for timer thread failed: %lu",
1875 GetLastError());
1876 CloseHandle(timer_thread);
1877 }
1878 if (timer_event)
1879 CloseHandle(timer_event);
1880 timer_event = NULL;
1881 timer_thread = NULL;
1882}
1883static inline int is_timeval_eq(const struct timeval *i1, const struct timeval *i2)
1885{
1886 return i1->tv_sec == i2->tv_sec && i1->tv_usec == i2->tv_usec;
1887}
1888int setitimer(int type, struct itimerval *in, struct itimerval *out)
1890{
1891 static const struct timeval zero;
1892 static int atexit_done;
1893 if (out != NULL)
1895 return errno = EINVAL,
1896 error("setitimer param 3 != NULL not implemented");
1897 if (!is_timeval_eq(&in->it_interval, &zero) &&
1898 !is_timeval_eq(&in->it_interval, &in->it_value))
1899 return errno = EINVAL,
1900 error("setitimer: it_interval must be zero or eq it_value");
1901 if (timer_thread)
1903 stop_timer_thread();
1904 if (is_timeval_eq(&in->it_value, &zero) &&
1906 is_timeval_eq(&in->it_interval, &zero))
1907 return 0;
1908 timer_interval = in->it_value.tv_sec * 1000 + in->it_value.tv_usec / 1000;
1910 one_shot = is_timeval_eq(&in->it_interval, &zero);
1911 if (!atexit_done) {
1912 atexit(stop_timer_thread);
1913 atexit_done = 1;
1914 }
1915 return start_timer_thread();
1916}
1917int sigaction(int sig, struct sigaction *in, struct sigaction *out)
1919{
1920 if (sig != SIGALRM)
1921 return errno = EINVAL,
1922 error("sigaction only implemented for SIGALRM");
1923 if (out != NULL)
1924 return errno = EINVAL,
1925 error("sigaction: param 3 != NULL not implemented");
1926 timer_fn = in->sa_handler;
1928 return 0;
1929}
1930#undef signal
1932sig_handler_t mingw_signal(int sig, sig_handler_t handler)
1933{
1934 sig_handler_t old;
1935 switch (sig) {
1937 case SIGALRM:
1938 old = timer_fn;
1939 timer_fn = handler;
1940 break;
1941 case SIGINT:
1943 old = sigint_fn;
1944 sigint_fn = handler;
1945 break;
1946 default:
1948 return signal(sig, handler);
1949 }
1950 return old;
1952}
1953#undef raise
1955int mingw_raise(int sig)
1956{
1957 switch (sig) {
1958 case SIGALRM:
1959 if (timer_fn == SIG_DFL) {
1960 if (isatty(STDERR_FILENO))
1961 fputs("Alarm clock\n", stderr);
1962 exit(128 + SIGALRM);
1963 } else if (timer_fn != SIG_IGN)
1964 timer_fn(SIGALRM);
1965 return 0;
1966 case SIGINT:
1968 if (sigint_fn == SIG_DFL)
1969 exit(128 + SIGINT);
1970 else if (sigint_fn != SIG_IGN)
1971 sigint_fn(SIGINT);
1972 return 0;
1973 default:
1975 return raise(sig);
1976 }
1977}
1978int link(const char *oldpath, const char *newpath)
1980{
1981 typedef BOOL (WINAPI *T)(LPCWSTR, LPCWSTR, LPSECURITY_ATTRIBUTES);
1982 static T create_hard_link = NULL;
1983 wchar_t woldpath[MAX_PATH], wnewpath[MAX_PATH];
1984 if (xutftowcs_path(woldpath, oldpath) < 0 ||
1985 xutftowcs_path(wnewpath, newpath) < 0)
1986 return -1;
1987 if (!create_hard_link) {
1989 create_hard_link = (T) GetProcAddress(
1990 GetModuleHandle("kernel32.dll"), "CreateHardLinkW");
1991 if (!create_hard_link)
1992 create_hard_link = (T)-1;
1993 }
1994 if (create_hard_link == (T)-1) {
1995 errno = ENOSYS;
1996 return -1;
1997 }
1998 if (!create_hard_link(wnewpath, woldpath, NULL)) {
1999 errno = err_win_to_posix(GetLastError());
2000 return -1;
2001 }
2002 return 0;
2003}
2004pid_t waitpid(pid_t pid, int *status, int options)
2006{
2007 HANDLE h = OpenProcess(SYNCHRONIZE | PROCESS_QUERY_INFORMATION,
2008 FALSE, pid);
2009 if (!h) {
2010 errno = ECHILD;
2011 return -1;
2012 }
2013 if (pid > 0 && options & WNOHANG) {
2015 if (WAIT_OBJECT_0 != WaitForSingleObject(h, 0)) {
2016 CloseHandle(h);
2017 return 0;
2018 }
2019 options &= ~WNOHANG;
2020 }
2021 if (options == 0) {
2023 struct pinfo_t **ppinfo;
2024 if (WaitForSingleObject(h, INFINITE) != WAIT_OBJECT_0) {
2025 CloseHandle(h);
2026 return 0;
2027 }
2028 if (status)
2030 GetExitCodeProcess(h, (LPDWORD)status);
2031 EnterCriticalSection(&pinfo_cs);
2033 ppinfo = &pinfo;
2035 while (*ppinfo) {
2036 struct pinfo_t *info = *ppinfo;
2037 if (info->pid == pid) {
2038 CloseHandle(info->proc);
2039 *ppinfo = info->next;
2040 free(info);
2041 break;
2042 }
2043 ppinfo = &info->next;
2044 }
2045 LeaveCriticalSection(&pinfo_cs);
2047 CloseHandle(h);
2049 return pid;
2050 }
2051 CloseHandle(h);
2052 errno = EINVAL;
2054 return -1;
2055}
2056int mingw_skip_dos_drive_prefix(char **path)
2058{
2059 int ret = has_dos_drive_prefix(*path);
2060 *path += ret;
2061 return ret;
2062}
2063int mingw_offset_1st_component(const char *path)
2065{
2066 char *pos = (char *)path;
2067 /* unc paths */
2069 if (!skip_dos_drive_prefix(&pos) &&
2070 is_dir_sep(pos[0]) && is_dir_sep(pos[1])) {
2071 /* skip server name */
2072 pos = strpbrk(pos + 2, "\\/");
2073 if (!pos)
2074 return 0; /* Error: malformed unc path */
2075 do {
2077 pos++;
2078 } while (*pos && !is_dir_sep(*pos));
2079 }
2080 return pos + is_dir_sep(*pos) - path;
2082}
2083int xutftowcsn(wchar_t *wcs, const char *utfs, size_t wcslen, int utflen)
2085{
2086 int upos = 0, wpos = 0;
2087 const unsigned char *utf = (const unsigned char*) utfs;
2088 if (!utf || !wcs || wcslen < 1) {
2089 errno = EINVAL;
2090 return -1;
2091 }
2092 /* reserve space for \0 */
2093 wcslen--;
2094 if (utflen < 0)
2095 utflen = INT_MAX;
2096 while (upos < utflen) {
2098 int c = utf[upos++] & 0xff;
2099 if (utflen == INT_MAX && c == 0)
2100 break;
2101 if (wpos >= wcslen) {
2103 wcs[wpos] = 0;
2104 errno = ERANGE;
2105 return -1;
2106 }
2107 if (c < 0x80) {
2109 /* ASCII */
2110 wcs[wpos++] = c;
2111 } else if (c >= 0xc2 && c < 0xe0 && upos < utflen &&
2112 (utf[upos] & 0xc0) == 0x80) {
2113 /* 2-byte utf-8 */
2114 c = ((c & 0x1f) << 6);
2115 c |= (utf[upos++] & 0x3f);
2116 wcs[wpos++] = c;
2117 } else if (c >= 0xe0 && c < 0xf0 && upos + 1 < utflen &&
2118 !(c == 0xe0 && utf[upos] < 0xa0) && /* over-long encoding */
2119 (utf[upos] & 0xc0) == 0x80 &&
2120 (utf[upos + 1] & 0xc0) == 0x80) {
2121 /* 3-byte utf-8 */
2122 c = ((c & 0x0f) << 12);
2123 c |= ((utf[upos++] & 0x3f) << 6);
2124 c |= (utf[upos++] & 0x3f);
2125 wcs[wpos++] = c;
2126 } else if (c >= 0xf0 && c < 0xf5 && upos + 2 < utflen &&
2127 wpos + 1 < wcslen &&
2128 !(c == 0xf0 && utf[upos] < 0x90) && /* over-long encoding */
2129 !(c == 0xf4 && utf[upos] >= 0x90) && /* > \u10ffff */
2130 (utf[upos] & 0xc0) == 0x80 &&
2131 (utf[upos + 1] & 0xc0) == 0x80 &&
2132 (utf[upos + 2] & 0xc0) == 0x80) {
2133 /* 4-byte utf-8: convert to \ud8xx \udcxx surrogate pair */
2134 c = ((c & 0x07) << 18);
2135 c |= ((utf[upos++] & 0x3f) << 12);
2136 c |= ((utf[upos++] & 0x3f) << 6);
2137 c |= (utf[upos++] & 0x3f);
2138 c -= 0x10000;
2139 wcs[wpos++] = 0xd800 | (c >> 10);
2140 wcs[wpos++] = 0xdc00 | (c & 0x3ff);
2141 } else if (c >= 0xa0) {
2142 /* invalid utf-8 byte, printable unicode char: convert 1:1 */
2143 wcs[wpos++] = c;
2144 } else {
2145 /* invalid utf-8 byte, non-printable unicode: convert to hex */
2146 static const char *hex = "0123456789abcdef";
2147 wcs[wpos++] = hex[c >> 4];
2148 if (wpos < wcslen)
2149 wcs[wpos++] = hex[c & 0x0f];
2150 }
2151 }
2152 wcs[wpos] = 0;
2153 return wpos;
2154}
2155int xwcstoutf(char *utf, const wchar_t *wcs, size_t utflen)
2157{
2158 if (!wcs || !utf || utflen < 1) {
2159 errno = EINVAL;
2160 return -1;
2161 }
2162 utflen = WideCharToMultiByte(CP_UTF8, 0, wcs, -1, utf, utflen, NULL, NULL);
2163 if (utflen)
2164 return utflen - 1;
2165 errno = ERANGE;
2166 return -1;
2167}
2168static void setup_windows_environment(void)
2170{
2171 char *tmp = getenv("TMPDIR");
2172 /* on Windows it is TMP and TEMP */
2174 if (!tmp) {
2175 if (!(tmp = getenv("TMP")))
2176 tmp = getenv("TEMP");
2177 if (tmp) {
2178 setenv("TMPDIR", tmp, 1);
2179 tmp = getenv("TMPDIR");
2180 }
2181 }
2182 if (tmp) {
2184 /*
2185 * Convert all dir separators to forward slashes,
2186 * to help shell commands called from the Git
2187 * executable (by not mistaking the dir separators
2188 * for escape characters).
2189 */
2190 convert_slashes(tmp);
2191 }
2192 /* simulate TERM to enable auto-color (see color.c) */
2194 if (!getenv("TERM"))
2195 setenv("TERM", "cygwin", 1);
2196}
2197/*
2199 * Disable MSVCRT command line wildcard expansion (__getmainargs called from
2200 * mingw startup code, see init.c in mingw runtime).
2201 */
2202int _CRT_glob = 0;
2203typedef struct {
2205 int newmode;
2206} _startupinfo;
2207extern int __wgetmainargs(int *argc, wchar_t ***argv, wchar_t ***env, int glob,
2209 _startupinfo *si);
2210static NORETURN void die_startup(void)
2212{
2213 fputs("fatal: not enough memory for initialization", stderr);
2214 exit(128);
2215}
2216static void *malloc_startup(size_t size)
2218{
2219 void *result = malloc(size);
2220 if (!result)
2221 die_startup();
2222 return result;
2223}
2224static char *wcstoutfdup_startup(char *buffer, const wchar_t *wcs, size_t len)
2226{
2227 len = xwcstoutf(buffer, wcs, len) + 1;
2228 return memcpy(malloc_startup(len), buffer, len);
2229}
2230static void maybe_redirect_std_handle(const wchar_t *key, DWORD std_id, int fd,
2232 DWORD desired_access, DWORD flags)
2233{
2234 DWORD create_flag = fd ? OPEN_ALWAYS : OPEN_EXISTING;
2235 wchar_t buf[MAX_PATH];
2236 DWORD max = ARRAY_SIZE(buf);
2237 HANDLE handle;
2238 DWORD ret = GetEnvironmentVariableW(key, buf, max);
2239 if (!ret || ret >= max)
2241 return;
2242 /* make sure this does not leak into child processes */
2244 SetEnvironmentVariableW(key, NULL);
2245 if (!wcscmp(buf, L"off")) {
2246 close(fd);
2247 handle = GetStdHandle(std_id);
2248 if (handle != INVALID_HANDLE_VALUE)
2249 CloseHandle(handle);
2250 return;
2251 }
2252 if (std_id == STD_ERROR_HANDLE && !wcscmp(buf, L"2>&1")) {
2253 handle = GetStdHandle(STD_OUTPUT_HANDLE);
2254 if (handle == INVALID_HANDLE_VALUE) {
2255 close(fd);
2256 handle = GetStdHandle(std_id);
2257 if (handle != INVALID_HANDLE_VALUE)
2258 CloseHandle(handle);
2259 } else {
2260 int new_fd = _open_osfhandle((intptr_t)handle, O_BINARY);
2261 SetStdHandle(std_id, handle);
2262 dup2(new_fd, fd);
2263 /* do *not* close the new_fd: that would close stdout */
2264 }
2265 return;
2266 }
2267 handle = CreateFileW(buf, desired_access, 0, NULL, create_flag,
2268 flags, NULL);
2269 if (handle != INVALID_HANDLE_VALUE) {
2270 int new_fd = _open_osfhandle((intptr_t)handle, O_BINARY);
2271 SetStdHandle(std_id, handle);
2272 dup2(new_fd, fd);
2273 close(new_fd);
2274 }
2275}
2276static void maybe_redirect_std_handles(void)
2278{
2279 maybe_redirect_std_handle(L"GIT_REDIRECT_STDIN", STD_INPUT_HANDLE, 0,
2280 GENERIC_READ, FILE_ATTRIBUTE_NORMAL);
2281 maybe_redirect_std_handle(L"GIT_REDIRECT_STDOUT", STD_OUTPUT_HANDLE, 1,
2282 GENERIC_WRITE, FILE_ATTRIBUTE_NORMAL);
2283 maybe_redirect_std_handle(L"GIT_REDIRECT_STDERR", STD_ERROR_HANDLE, 2,
2284 GENERIC_WRITE, FILE_FLAG_NO_BUFFERING);
2285}
2286void mingw_startup(void)
2288{
2289 int i, maxlen, argc;
2290 char *buffer;
2291 wchar_t **wenv, **wargv;
2292 _startupinfo si;
2293 maybe_redirect_std_handles();
2295 /* get wide char arguments and environment */
2297 si.newmode = 0;
2298 if (__wgetmainargs(&argc, &wargv, &wenv, _CRT_glob, &si) < 0)
2299 die_startup();
2300 /* determine size of argv and environ conversion buffer */
2302 maxlen = wcslen(wargv[0]);
2303 for (i = 1; i < argc; i++)
2304 maxlen = max(maxlen, wcslen(wargv[i]));
2305 for (i = 0; wenv[i]; i++)
2306 maxlen = max(maxlen, wcslen(wenv[i]));
2307 /*
2309 * nedmalloc can't free CRT memory, allocate resizable environment
2310 * list. Note that xmalloc / xmemdupz etc. call getenv, so we cannot
2311 * use it while initializing the environment itself.
2312 */
2313 environ_size = i + 1;
2314 environ_alloc = alloc_nr(environ_size * sizeof(char*));
2315 environ = malloc_startup(environ_alloc);
2316 /* allocate buffer (wchar_t encodes to max 3 UTF-8 bytes) */
2318 maxlen = 3 * maxlen + 1;
2319 buffer = malloc_startup(maxlen);
2320 /* convert command line arguments and environment to UTF-8 */
2322 for (i = 0; i < argc; i++)
2323 __argv[i] = wcstoutfdup_startup(buffer, wargv[i], maxlen);
2324 for (i = 0; wenv[i]; i++)
2325 environ[i] = wcstoutfdup_startup(buffer, wenv[i], maxlen);
2326 environ[i] = NULL;
2327 free(buffer);
2328 /* sort environment for O(log n) getenv / putenv */
2330 qsort(environ, i, sizeof(char*), compareenv);
2331 /* fix Windows specific environment settings */
2333 setup_windows_environment();
2334 /* initialize critical section for waitpid pinfo_t list */
2336 InitializeCriticalSection(&pinfo_cs);
2337 /* set up default file mode and file modes for stdin/out/err */
2339 _fmode = _O_BINARY;
2340 _setmode(_fileno(stdin), _O_BINARY);
2341 _setmode(_fileno(stdout), _O_BINARY);
2342 _setmode(_fileno(stderr), _O_BINARY);
2343 /* initialize Unicode console */
2345 winansi_init();
2346}
2347int uname(struct utsname *buf)
2349{
2350 unsigned v = (unsigned)GetVersion();
2351 memset(buf, 0, sizeof(*buf));
2352 xsnprintf(buf->sysname, sizeof(buf->sysname), "Windows");
2353 xsnprintf(buf->release, sizeof(buf->release),
2354 "%u.%u", v & 0xff, (v >> 8) & 0xff);
2355 /* assuming NT variants only.. */
2356 xsnprintf(buf->version, sizeof(buf->version),
2357 "%u", (v >> 16) & 0x7fff);
2358 return 0;
2359}