293f286af1990566208d9a3b38503d9a3657edfb
1#include "../git-compat-util.h"
2#include "win32.h"
3#include <conio.h>
4#include <wchar.h>
5#include "../strbuf.h"
6#include "../run-command.h"
7#include "../cache.h"
8#include "win32/lazyload.h"
9#define HCAST(type, handle) ((type)(intptr_t)handle)
11static const int delay[] = { 0, 1, 10, 20, 40 };
13int err_win_to_posix(DWORD winerr)
15{
16 int error = ENOSYS;
17 switch(winerr) {
18 case ERROR_ACCESS_DENIED: error = EACCES; break;
19 case ERROR_ACCOUNT_DISABLED: error = EACCES; break;
20 case ERROR_ACCOUNT_RESTRICTION: error = EACCES; break;
21 case ERROR_ALREADY_ASSIGNED: error = EBUSY; break;
22 case ERROR_ALREADY_EXISTS: error = EEXIST; break;
23 case ERROR_ARITHMETIC_OVERFLOW: error = ERANGE; break;
24 case ERROR_BAD_COMMAND: error = EIO; break;
25 case ERROR_BAD_DEVICE: error = ENODEV; break;
26 case ERROR_BAD_DRIVER_LEVEL: error = ENXIO; break;
27 case ERROR_BAD_EXE_FORMAT: error = ENOEXEC; break;
28 case ERROR_BAD_FORMAT: error = ENOEXEC; break;
29 case ERROR_BAD_LENGTH: error = EINVAL; break;
30 case ERROR_BAD_PATHNAME: error = ENOENT; break;
31 case ERROR_BAD_PIPE: error = EPIPE; break;
32 case ERROR_BAD_UNIT: error = ENODEV; break;
33 case ERROR_BAD_USERNAME: error = EINVAL; break;
34 case ERROR_BROKEN_PIPE: error = EPIPE; break;
35 case ERROR_BUFFER_OVERFLOW: error = ENAMETOOLONG; break;
36 case ERROR_BUSY: error = EBUSY; break;
37 case ERROR_BUSY_DRIVE: error = EBUSY; break;
38 case ERROR_CALL_NOT_IMPLEMENTED: error = ENOSYS; break;
39 case ERROR_CANNOT_MAKE: error = EACCES; break;
40 case ERROR_CANTOPEN: error = EIO; break;
41 case ERROR_CANTREAD: error = EIO; break;
42 case ERROR_CANTWRITE: error = EIO; break;
43 case ERROR_CRC: error = EIO; break;
44 case ERROR_CURRENT_DIRECTORY: error = EACCES; break;
45 case ERROR_DEVICE_IN_USE: error = EBUSY; break;
46 case ERROR_DEV_NOT_EXIST: error = ENODEV; break;
47 case ERROR_DIRECTORY: error = EINVAL; break;
48 case ERROR_DIR_NOT_EMPTY: error = ENOTEMPTY; break;
49 case ERROR_DISK_CHANGE: error = EIO; break;
50 case ERROR_DISK_FULL: error = ENOSPC; break;
51 case ERROR_DRIVE_LOCKED: error = EBUSY; break;
52 case ERROR_ENVVAR_NOT_FOUND: error = EINVAL; break;
53 case ERROR_EXE_MARKED_INVALID: error = ENOEXEC; break;
54 case ERROR_FILENAME_EXCED_RANGE: error = ENAMETOOLONG; break;
55 case ERROR_FILE_EXISTS: error = EEXIST; break;
56 case ERROR_FILE_INVALID: error = ENODEV; break;
57 case ERROR_FILE_NOT_FOUND: error = ENOENT; break;
58 case ERROR_GEN_FAILURE: error = EIO; break;
59 case ERROR_HANDLE_DISK_FULL: error = ENOSPC; break;
60 case ERROR_INSUFFICIENT_BUFFER: error = ENOMEM; break;
61 case ERROR_INVALID_ACCESS: error = EACCES; break;
62 case ERROR_INVALID_ADDRESS: error = EFAULT; break;
63 case ERROR_INVALID_BLOCK: error = EFAULT; break;
64 case ERROR_INVALID_DATA: error = EINVAL; break;
65 case ERROR_INVALID_DRIVE: error = ENODEV; break;
66 case ERROR_INVALID_EXE_SIGNATURE: error = ENOEXEC; break;
67 case ERROR_INVALID_FLAGS: error = EINVAL; break;
68 case ERROR_INVALID_FUNCTION: error = ENOSYS; break;
69 case ERROR_INVALID_HANDLE: error = EBADF; break;
70 case ERROR_INVALID_LOGON_HOURS: error = EACCES; break;
71 case ERROR_INVALID_NAME: error = EINVAL; break;
72 case ERROR_INVALID_OWNER: error = EINVAL; break;
73 case ERROR_INVALID_PARAMETER: error = EINVAL; break;
74 case ERROR_INVALID_PASSWORD: error = EPERM; break;
75 case ERROR_INVALID_PRIMARY_GROUP: error = EINVAL; break;
76 case ERROR_INVALID_SIGNAL_NUMBER: error = EINVAL; break;
77 case ERROR_INVALID_TARGET_HANDLE: error = EIO; break;
78 case ERROR_INVALID_WORKSTATION: error = EACCES; break;
79 case ERROR_IO_DEVICE: error = EIO; break;
80 case ERROR_IO_INCOMPLETE: error = EINTR; break;
81 case ERROR_LOCKED: error = EBUSY; break;
82 case ERROR_LOCK_VIOLATION: error = EACCES; break;
83 case ERROR_LOGON_FAILURE: error = EACCES; break;
84 case ERROR_MAPPED_ALIGNMENT: error = EINVAL; break;
85 case ERROR_META_EXPANSION_TOO_LONG: error = E2BIG; break;
86 case ERROR_MORE_DATA: error = EPIPE; break;
87 case ERROR_NEGATIVE_SEEK: error = ESPIPE; break;
88 case ERROR_NOACCESS: error = EFAULT; break;
89 case ERROR_NONE_MAPPED: error = EINVAL; break;
90 case ERROR_NOT_ENOUGH_MEMORY: error = ENOMEM; break;
91 case ERROR_NOT_READY: error = EAGAIN; break;
92 case ERROR_NOT_SAME_DEVICE: error = EXDEV; break;
93 case ERROR_NO_DATA: error = EPIPE; break;
94 case ERROR_NO_MORE_SEARCH_HANDLES: error = EIO; break;
95 case ERROR_NO_PROC_SLOTS: error = EAGAIN; break;
96 case ERROR_NO_SUCH_PRIVILEGE: error = EACCES; break;
97 case ERROR_OPEN_FAILED: error = EIO; break;
98 case ERROR_OPEN_FILES: error = EBUSY; break;
99 case ERROR_OPERATION_ABORTED: error = EINTR; break;
100 case ERROR_OUTOFMEMORY: error = ENOMEM; break;
101 case ERROR_PASSWORD_EXPIRED: error = EACCES; break;
102 case ERROR_PATH_BUSY: error = EBUSY; break;
103 case ERROR_PATH_NOT_FOUND: error = ENOENT; break;
104 case ERROR_PIPE_BUSY: error = EBUSY; break;
105 case ERROR_PIPE_CONNECTED: error = EPIPE; break;
106 case ERROR_PIPE_LISTENING: error = EPIPE; break;
107 case ERROR_PIPE_NOT_CONNECTED: error = EPIPE; break;
108 case ERROR_PRIVILEGE_NOT_HELD: error = EACCES; break;
109 case ERROR_READ_FAULT: error = EIO; break;
110 case ERROR_SEEK: error = EIO; break;
111 case ERROR_SEEK_ON_DEVICE: error = ESPIPE; break;
112 case ERROR_SHARING_BUFFER_EXCEEDED: error = ENFILE; break;
113 case ERROR_SHARING_VIOLATION: error = EACCES; break;
114 case ERROR_STACK_OVERFLOW: error = ENOMEM; break;
115 case ERROR_SWAPERROR: error = ENOENT; break;
116 case ERROR_TOO_MANY_MODULES: error = EMFILE; break;
117 case ERROR_TOO_MANY_OPEN_FILES: error = EMFILE; break;
118 case ERROR_UNRECOGNIZED_MEDIA: error = ENXIO; break;
119 case ERROR_UNRECOGNIZED_VOLUME: error = ENODEV; break;
120 case ERROR_WAIT_NO_CHILDREN: error = ECHILD; break;
121 case ERROR_WRITE_FAULT: error = EIO; break;
122 case ERROR_WRITE_PROTECT: error = EROFS; break;
123 }
124 return error;
125}
126static inline int is_file_in_use_error(DWORD errcode)
128{
129 switch (errcode) {
130 case ERROR_SHARING_VIOLATION:
131 case ERROR_ACCESS_DENIED:
132 return 1;
133 }
134 return 0;
136}
137static int read_yes_no_answer(void)
139{
140 char answer[1024];
141 if (fgets(answer, sizeof(answer), stdin)) {
143 size_t answer_len = strlen(answer);
144 int got_full_line = 0, c;
145 /* remove the newline */
147 if (answer_len >= 2 && answer[answer_len-2] == '\r') {
148 answer[answer_len-2] = '\0';
149 got_full_line = 1;
150 } else if (answer_len >= 1 && answer[answer_len-1] == '\n') {
151 answer[answer_len-1] = '\0';
152 got_full_line = 1;
153 }
154 /* flush the buffer in case we did not get the full line */
155 if (!got_full_line)
156 while ((c = getchar()) != EOF && c != '\n')
157 ;
158 } else
159 /* we could not read, return the
160 * default answer which is no */
161 return 0;
162 if (tolower(answer[0]) == 'y' && !answer[1])
164 return 1;
165 if (!strncasecmp(answer, "yes", sizeof(answer)))
166 return 1;
167 if (tolower(answer[0]) == 'n' && !answer[1])
168 return 0;
169 if (!strncasecmp(answer, "no", sizeof(answer)))
170 return 0;
171 /* did not find an answer we understand */
173 return -1;
174}
175static int ask_yes_no_if_possible(const char *format, ...)
177{
178 char question[4096];
179 const char *retry_hook[] = { NULL, NULL, NULL };
180 va_list args;
181 va_start(args, format);
183 vsnprintf(question, sizeof(question), format, args);
184 va_end(args);
185 if ((retry_hook[0] = mingw_getenv("GIT_ASK_YESNO"))) {
187 retry_hook[1] = question;
188 return !run_command_v_opt(retry_hook, 0);
189 }
190 if (!isatty(_fileno(stdin)) || !isatty(_fileno(stderr)))
192 return 0;
193 while (1) {
195 int answer;
196 fprintf(stderr, "%s (y/n) ", question);
197 if ((answer = read_yes_no_answer()) >= 0)
199 return answer;
200 fprintf(stderr, "Sorry, I did not understand your answer. "
202 "Please type 'y' or 'n'\n");
203 }
204}
205int mingw_core_config(const char *var, const char *value, void *cb)
207{
208 return 0;
209}
210/* Normalizes NT paths as returned by some low-level APIs. */
212static wchar_t *normalize_ntpath(wchar_t *wbuf)
213{
214 int i;
215 /* fix absolute path prefixes */
216 if (wbuf[0] == '\\') {
217 /* strip NT namespace prefixes */
218 if (!wcsncmp(wbuf, L"\\??\\", 4) ||
219 !wcsncmp(wbuf, L"\\\\?\\", 4))
220 wbuf += 4;
221 else if (!wcsnicmp(wbuf, L"\\DosDevices\\", 12))
222 wbuf += 12;
223 /* replace remaining '...UNC\' with '\\' */
224 if (!wcsnicmp(wbuf, L"UNC\\", 4)) {
225 wbuf += 2;
226 *wbuf = '\\';
227 }
228 }
229 /* convert backslashes to slashes */
230 for (i = 0; wbuf[i]; i++)
231 if (wbuf[i] == '\\')
232 wbuf[i] = '/';
233 return wbuf;
234}
235int mingw_unlink(const char *pathname)
237{
238 int ret, tries = 0;
239 wchar_t wpathname[MAX_PATH];
240 if (xutftowcs_path(wpathname, pathname) < 0)
241 return -1;
242 /* read-only files cannot be removed */
244 _wchmod(wpathname, 0666);
245 while ((ret = _wunlink(wpathname)) == -1 && tries < ARRAY_SIZE(delay)) {
246 if (!is_file_in_use_error(GetLastError()))
247 break;
248 /*
249 * We assume that some other process had the source or
250 * destination file open at the wrong moment and retry.
251 * In order to give the other process a higher chance to
252 * complete its operation, we give up our time slice now.
253 * If we have to retry again, we do sleep a bit.
254 */
255 Sleep(delay[tries]);
256 tries++;
257 }
258 while (ret == -1 && is_file_in_use_error(GetLastError()) &&
259 ask_yes_no_if_possible("Unlink of file '%s' failed. "
260 "Should I try again?", pathname))
261 ret = _wunlink(wpathname);
262 return ret;
263}
264static int is_dir_empty(const wchar_t *wpath)
266{
267 WIN32_FIND_DATAW findbuf;
268 HANDLE handle;
269 wchar_t wbuf[MAX_PATH + 2];
270 wcscpy(wbuf, wpath);
271 wcscat(wbuf, L"\\*");
272 handle = FindFirstFileW(wbuf, &findbuf);
273 if (handle == INVALID_HANDLE_VALUE)
274 return GetLastError() == ERROR_NO_MORE_FILES;
275 while (!wcscmp(findbuf.cFileName, L".") ||
277 !wcscmp(findbuf.cFileName, L".."))
278 if (!FindNextFileW(handle, &findbuf)) {
279 DWORD err = GetLastError();
280 FindClose(handle);
281 return err == ERROR_NO_MORE_FILES;
282 }
283 FindClose(handle);
284 return 0;
285}
286int mingw_rmdir(const char *pathname)
288{
289 int ret, tries = 0;
290 wchar_t wpathname[MAX_PATH];
291 if (xutftowcs_path(wpathname, pathname) < 0)
292 return -1;
293 while ((ret = _wrmdir(wpathname)) == -1 && tries < ARRAY_SIZE(delay)) {
295 if (!is_file_in_use_error(GetLastError()))
296 errno = err_win_to_posix(GetLastError());
297 if (errno != EACCES)
298 break;
299 if (!is_dir_empty(wpathname)) {
300 errno = ENOTEMPTY;
301 break;
302 }
303 /*
304 * We assume that some other process had the source or
305 * destination file open at the wrong moment and retry.
306 * In order to give the other process a higher chance to
307 * complete its operation, we give up our time slice now.
308 * If we have to retry again, we do sleep a bit.
309 */
310 Sleep(delay[tries]);
311 tries++;
312 }
313 while (ret == -1 && errno == EACCES && is_file_in_use_error(GetLastError()) &&
314 ask_yes_no_if_possible("Deletion of directory '%s' failed. "
315 "Should I try again?", pathname))
316 ret = _wrmdir(wpathname);
317 return ret;
318}
319static inline int needs_hiding(const char *path)
321{
322 const char *basename;
323 if (hide_dotfiles == HIDE_DOTFILES_FALSE)
325 return 0;
326 /* We cannot use basename(), as it would remove trailing slashes */
328 mingw_skip_dos_drive_prefix((char **)&path);
329 if (!*path)
330 return 0;
331 for (basename = path; *path; path++)
333 if (is_dir_sep(*path)) {
334 do {
335 path++;
336 } while (is_dir_sep(*path));
337 /* ignore trailing slashes */
338 if (*path)
339 basename = path;
340 }
341 if (hide_dotfiles == HIDE_DOTFILES_TRUE)
343 return *basename == '.';
344 assert(hide_dotfiles == HIDE_DOTFILES_DOTGITONLY);
346 return !strncasecmp(".git", basename, 4) &&
347 (!basename[4] || is_dir_sep(basename[4]));
348}
349static int set_hidden_flag(const wchar_t *path, int set)
351{
352 DWORD original = GetFileAttributesW(path), modified;
353 if (set)
354 modified = original | FILE_ATTRIBUTE_HIDDEN;
355 else
356 modified = original & ~FILE_ATTRIBUTE_HIDDEN;
357 if (original == modified || SetFileAttributesW(path, modified))
358 return 0;
359 errno = err_win_to_posix(GetLastError());
360 return -1;
361}
362int mingw_mkdir(const char *path, int mode)
364{
365 int ret;
366 wchar_t wpath[MAX_PATH];
367 if (xutftowcs_path(wpath, path) < 0)
368 return -1;
369 ret = _wmkdir(wpath);
370 if (!ret && needs_hiding(path))
371 return set_hidden_flag(wpath, 1);
372 return ret;
373}
374/*
376 * Calling CreateFile() using FILE_APPEND_DATA and without FILE_WRITE_DATA
377 * is documented in [1] as opening a writable file handle in append mode.
378 * (It is believed that) this is atomic since it is maintained by the
379 * kernel unlike the O_APPEND flag which is racily maintained by the CRT.
380 *
381 * [1] https://docs.microsoft.com/en-us/windows/desktop/fileio/file-access-rights-constants
382 *
383 * This trick does not appear to work for named pipes. Instead it creates
384 * a named pipe client handle that cannot be written to. Callers should
385 * just use the regular _wopen() for them. (And since client handle gets
386 * bound to a unique server handle, it isn't really an issue.)
387 */
388static int mingw_open_append(wchar_t const *wfilename, int oflags, ...)
389{
390 HANDLE handle;
391 int fd;
392 DWORD create = (oflags & O_CREAT) ? OPEN_ALWAYS : OPEN_EXISTING;
393 /* only these flags are supported */
395 if ((oflags & ~O_CREAT) != (O_WRONLY | O_APPEND))
396 return errno = ENOSYS, -1;
397 /*
399 * FILE_SHARE_WRITE is required to permit child processes
400 * to append to the file.
401 */
402 handle = CreateFileW(wfilename, FILE_APPEND_DATA,
403 FILE_SHARE_WRITE | FILE_SHARE_READ,
404 NULL, create, FILE_ATTRIBUTE_NORMAL, NULL);
405 if (handle == INVALID_HANDLE_VALUE)
406 return errno = err_win_to_posix(GetLastError()), -1;
407 /*
409 * No O_APPEND here, because the CRT uses it only to reset the
410 * file pointer to EOF before each write(); but that is not
411 * necessary (and may lead to races) for a file created with
412 * FILE_APPEND_DATA.
413 */
414 fd = _open_osfhandle((intptr_t)handle, O_BINARY);
415 if (fd < 0)
416 CloseHandle(handle);
417 return fd;
418}
419/*
421 * Does the pathname map to the local named pipe filesystem?
422 * That is, does it have a "//./pipe/" prefix?
423 */
424static int is_local_named_pipe_path(const char *filename)
425{
426 return (is_dir_sep(filename[0]) &&
427 is_dir_sep(filename[1]) &&
428 filename[2] == '.' &&
429 is_dir_sep(filename[3]) &&
430 !strncasecmp(filename+4, "pipe", 4) &&
431 is_dir_sep(filename[8]) &&
432 filename[9]);
433}
434int mingw_open (const char *filename, int oflags, ...)
436{
437 typedef int (*open_fn_t)(wchar_t const *wfilename, int oflags, ...);
438 va_list args;
439 unsigned mode;
440 int fd;
441 wchar_t wfilename[MAX_PATH];
442 open_fn_t open_fn;
443 va_start(args, oflags);
445 mode = va_arg(args, int);
446 va_end(args);
447 if (filename && !strcmp(filename, "/dev/null"))
449 filename = "nul";
450 if ((oflags & O_APPEND) && !is_local_named_pipe_path(filename))
452 open_fn = mingw_open_append;
453 else
454 open_fn = _wopen;
455 if (xutftowcs_path(wfilename, filename) < 0)
457 return -1;
458 fd = open_fn(wfilename, oflags, mode);
459 if (fd < 0 && (oflags & O_ACCMODE) != O_RDONLY && errno == EACCES) {
461 DWORD attrs = GetFileAttributesW(wfilename);
462 if (attrs != INVALID_FILE_ATTRIBUTES && (attrs & FILE_ATTRIBUTE_DIRECTORY))
463 errno = EISDIR;
464 }
465 if ((oflags & O_CREAT) && needs_hiding(filename)) {
466 /*
467 * Internally, _wopen() uses the CreateFile() API which errors
468 * out with an ERROR_ACCESS_DENIED if CREATE_ALWAYS was
469 * specified and an already existing file's attributes do not
470 * match *exactly*. As there is no mode or flag we can set that
471 * would correspond to FILE_ATTRIBUTE_HIDDEN, let's just try
472 * again *without* the O_CREAT flag (that corresponds to the
473 * CREATE_ALWAYS flag of CreateFile()).
474 */
475 if (fd < 0 && errno == EACCES)
476 fd = open_fn(wfilename, oflags & ~O_CREAT, mode);
477 if (fd >= 0 && set_hidden_flag(wfilename, 1))
478 warning("could not mark '%s' as hidden.", filename);
479 }
480 return fd;
481}
482static BOOL WINAPI ctrl_ignore(DWORD type)
484{
485 return TRUE;
486}
487#undef fgetc
489int mingw_fgetc(FILE *stream)
490{
491 int ch;
492 if (!isatty(_fileno(stream)))
493 return fgetc(stream);
494 SetConsoleCtrlHandler(ctrl_ignore, TRUE);
496 while (1) {
497 ch = fgetc(stream);
498 if (ch != EOF || GetLastError() != ERROR_OPERATION_ABORTED)
499 break;
500 /* Ctrl+C was pressed, simulate SIGINT and retry */
502 mingw_raise(SIGINT);
503 }
504 SetConsoleCtrlHandler(ctrl_ignore, FALSE);
505 return ch;
506}
507#undef fopen
509FILE *mingw_fopen (const char *filename, const char *otype)
510{
511 int hide = needs_hiding(filename);
512 FILE *file;
513 wchar_t wfilename[MAX_PATH], wotype[4];
514 if (filename && !strcmp(filename, "/dev/null"))
515 filename = "nul";
516 if (xutftowcs_path(wfilename, filename) < 0 ||
517 xutftowcs(wotype, otype, ARRAY_SIZE(wotype)) < 0)
518 return NULL;
519 if (hide && !access(filename, F_OK) && set_hidden_flag(wfilename, 0)) {
520 error("could not unhide %s", filename);
521 return NULL;
522 }
523 file = _wfopen(wfilename, wotype);
524 if (!file && GetLastError() == ERROR_INVALID_NAME)
525 errno = ENOENT;
526 if (file && hide && set_hidden_flag(wfilename, 1))
527 warning("could not mark '%s' as hidden.", filename);
528 return file;
529}
530FILE *mingw_freopen (const char *filename, const char *otype, FILE *stream)
532{
533 int hide = needs_hiding(filename);
534 FILE *file;
535 wchar_t wfilename[MAX_PATH], wotype[4];
536 if (filename && !strcmp(filename, "/dev/null"))
537 filename = "nul";
538 if (xutftowcs_path(wfilename, filename) < 0 ||
539 xutftowcs(wotype, otype, ARRAY_SIZE(wotype)) < 0)
540 return NULL;
541 if (hide && !access(filename, F_OK) && set_hidden_flag(wfilename, 0)) {
542 error("could not unhide %s", filename);
543 return NULL;
544 }
545 file = _wfreopen(wfilename, wotype, stream);
546 if (file && hide && set_hidden_flag(wfilename, 1))
547 warning("could not mark '%s' as hidden.", filename);
548 return file;
549}
550#undef fflush
552int mingw_fflush(FILE *stream)
553{
554 int ret = fflush(stream);
555 /*
557 * write() is used behind the scenes of stdio output functions.
558 * Since git code does not check for errors after each stdio write
559 * operation, it can happen that write() is called by a later
560 * stdio function even if an earlier write() call failed. In the
561 * case of a pipe whose readable end was closed, only the first
562 * call to write() reports EPIPE on Windows. Subsequent write()
563 * calls report EINVAL. It is impossible to notice whether this
564 * fflush invocation triggered such a case, therefore, we have to
565 * catch all EINVAL errors whole-sale.
566 */
567 if (ret && errno == EINVAL)
568 errno = EPIPE;
569 return ret;
571}
572#undef write
574ssize_t mingw_write(int fd, const void *buf, size_t len)
575{
576 ssize_t result = write(fd, buf, len);
577 if (result < 0 && errno == EINVAL && buf) {
579 /* check if fd is a pipe */
580 HANDLE h = (HANDLE) _get_osfhandle(fd);
581 if (GetFileType(h) == FILE_TYPE_PIPE)
582 errno = EPIPE;
583 else
584 errno = EINVAL;
585 }
586 return result;
588}
589int mingw_access(const char *filename, int mode)
591{
592 wchar_t wfilename[MAX_PATH];
593 if (xutftowcs_path(wfilename, filename) < 0)
594 return -1;
595 /* X_OK is not supported by the MSVCRT version */
596 return _waccess(wfilename, mode & ~X_OK);
597}
598int mingw_chdir(const char *dirname)
600{
601 wchar_t wdirname[MAX_PATH];
602 if (xutftowcs_path(wdirname, dirname) < 0)
603 return -1;
604 return _wchdir(wdirname);
605}
606int mingw_chmod(const char *filename, int mode)
608{
609 wchar_t wfilename[MAX_PATH];
610 if (xutftowcs_path(wfilename, filename) < 0)
611 return -1;
612 return _wchmod(wfilename, mode);
613}
614/*
616 * The unit of FILETIME is 100-nanoseconds since January 1, 1601, UTC.
617 * Returns the 100-nanoseconds ("hekto nanoseconds") since the epoch.
618 */
619static inline long long filetime_to_hnsec(const FILETIME *ft)
620{
621 long long winTime = ((long long)ft->dwHighDateTime << 32) + ft->dwLowDateTime;
622 /* Windows to Unix Epoch conversion */
623 return winTime - 116444736000000000LL;
624}
625static inline time_t filetime_to_time_t(const FILETIME *ft)
627{
628 return (time_t)(filetime_to_hnsec(ft) / 10000000);
629}
630/**
632 * Verifies that safe_create_leading_directories() would succeed.
633 */
634static int has_valid_directory_prefix(wchar_t *wfilename)
635{
636 int n = wcslen(wfilename);
637 while (n > 0) {
639 wchar_t c = wfilename[--n];
640 DWORD attributes;
641 if (!is_dir_sep(c))
643 continue;
644 wfilename[n] = L'\0';
646 attributes = GetFileAttributesW(wfilename);
647 wfilename[n] = c;
648 if (attributes == FILE_ATTRIBUTE_DIRECTORY ||
649 attributes == FILE_ATTRIBUTE_DEVICE)
650 return 1;
651 if (attributes == INVALID_FILE_ATTRIBUTES)
652 switch (GetLastError()) {
653 case ERROR_PATH_NOT_FOUND:
654 continue;
655 case ERROR_FILE_NOT_FOUND:
656 /* This implies parent directory exists. */
657 return 1;
658 }
659 return 0;
660 }
661 return 1;
662}
663/* We keep the do_lstat code in a separate function to avoid recursion.
665 * When a path ends with a slash, the stat will fail with ENOENT. In
666 * this case, we strip the trailing slashes and stat again.
667 *
668 * If follow is true then act like stat() and report on the link
669 * target. Otherwise report on the link itself.
670 */
671static int do_lstat(int follow, const char *file_name, struct stat *buf)
672{
673 WIN32_FILE_ATTRIBUTE_DATA fdata;
674 wchar_t wfilename[MAX_PATH];
675 if (xutftowcs_path(wfilename, file_name) < 0)
676 return -1;
677 if (GetFileAttributesExW(wfilename, GetFileExInfoStandard, &fdata)) {
679 buf->st_ino = 0;
680 buf->st_gid = 0;
681 buf->st_uid = 0;
682 buf->st_nlink = 1;
683 buf->st_mode = file_attr_to_st_mode(fdata.dwFileAttributes);
684 buf->st_size = fdata.nFileSizeLow |
685 (((off_t)fdata.nFileSizeHigh)<<32);
686 buf->st_dev = buf->st_rdev = 0; /* not used by Git */
687 buf->st_atime = filetime_to_time_t(&(fdata.ftLastAccessTime));
688 buf->st_mtime = filetime_to_time_t(&(fdata.ftLastWriteTime));
689 buf->st_ctime = filetime_to_time_t(&(fdata.ftCreationTime));
690 if (fdata.dwFileAttributes & FILE_ATTRIBUTE_REPARSE_POINT) {
691 WIN32_FIND_DATAW findbuf;
692 HANDLE handle = FindFirstFileW(wfilename, &findbuf);
693 if (handle != INVALID_HANDLE_VALUE) {
694 if ((findbuf.dwFileAttributes & FILE_ATTRIBUTE_REPARSE_POINT) &&
695 (findbuf.dwReserved0 == IO_REPARSE_TAG_SYMLINK)) {
696 if (follow) {
697 char buffer[MAXIMUM_REPARSE_DATA_BUFFER_SIZE];
698 buf->st_size = readlink(file_name, buffer, MAXIMUM_REPARSE_DATA_BUFFER_SIZE);
699 } else {
700 buf->st_mode = S_IFLNK;
701 }
702 buf->st_mode |= S_IREAD;
703 if (!(findbuf.dwFileAttributes & FILE_ATTRIBUTE_READONLY))
704 buf->st_mode |= S_IWRITE;
705 }
706 FindClose(handle);
707 }
708 }
709 return 0;
710 }
711 switch (GetLastError()) {
712 case ERROR_ACCESS_DENIED:
713 case ERROR_SHARING_VIOLATION:
714 case ERROR_LOCK_VIOLATION:
715 case ERROR_SHARING_BUFFER_EXCEEDED:
716 errno = EACCES;
717 break;
718 case ERROR_BUFFER_OVERFLOW:
719 errno = ENAMETOOLONG;
720 break;
721 case ERROR_NOT_ENOUGH_MEMORY:
722 errno = ENOMEM;
723 break;
724 case ERROR_PATH_NOT_FOUND:
725 if (!has_valid_directory_prefix(wfilename)) {
726 errno = ENOTDIR;
727 break;
728 }
729 /* fallthru */
730 default:
731 errno = ENOENT;
732 break;
733 }
734 return -1;
735}
736/* We provide our own lstat/fstat functions, since the provided
738 * lstat/fstat functions are so slow. These stat functions are
739 * tailored for Git's usage (read: fast), and are not meant to be
740 * complete. Note that Git stat()s are redirected to mingw_lstat()
741 * too, since Windows doesn't really handle symlinks that well.
742 */
743static int do_stat_internal(int follow, const char *file_name, struct stat *buf)
744{
745 int namelen;
746 char alt_name[PATH_MAX];
747 if (!do_lstat(follow, file_name, buf))
749 return 0;
750 /* if file_name ended in a '/', Windows returned ENOENT;
752 * try again without trailing slashes
753 */
754 if (errno != ENOENT)
755 return -1;
756 namelen = strlen(file_name);
758 if (namelen && file_name[namelen-1] != '/')
759 return -1;
760 while (namelen && file_name[namelen-1] == '/')
761 --namelen;
762 if (!namelen || namelen >= PATH_MAX)
763 return -1;
764 memcpy(alt_name, file_name, namelen);
766 alt_name[namelen] = 0;
767 return do_lstat(follow, alt_name, buf);
768}
769int mingw_lstat(const char *file_name, struct stat *buf)
771{
772 return do_stat_internal(0, file_name, buf);
773}
774int mingw_stat(const char *file_name, struct stat *buf)
775{
776 return do_stat_internal(1, file_name, buf);
777}
778int mingw_fstat(int fd, struct stat *buf)
780{
781 HANDLE fh = (HANDLE)_get_osfhandle(fd);
782 BY_HANDLE_FILE_INFORMATION fdata;
783 if (fh == INVALID_HANDLE_VALUE) {
785 errno = EBADF;
786 return -1;
787 }
788 /* direct non-file handles to MS's fstat() */
789 if (GetFileType(fh) != FILE_TYPE_DISK)
790 return _fstati64(fd, buf);
791 if (GetFileInformationByHandle(fh, &fdata)) {
793 buf->st_ino = 0;
794 buf->st_gid = 0;
795 buf->st_uid = 0;
796 buf->st_nlink = 1;
797 buf->st_mode = file_attr_to_st_mode(fdata.dwFileAttributes);
798 buf->st_size = fdata.nFileSizeLow |
799 (((off_t)fdata.nFileSizeHigh)<<32);
800 buf->st_dev = buf->st_rdev = 0; /* not used by Git */
801 buf->st_atime = filetime_to_time_t(&(fdata.ftLastAccessTime));
802 buf->st_mtime = filetime_to_time_t(&(fdata.ftLastWriteTime));
803 buf->st_ctime = filetime_to_time_t(&(fdata.ftCreationTime));
804 return 0;
805 }
806 errno = EBADF;
807 return -1;
808}
809static inline void time_t_to_filetime(time_t t, FILETIME *ft)
811{
812 long long winTime = t * 10000000LL + 116444736000000000LL;
813 ft->dwLowDateTime = winTime;
814 ft->dwHighDateTime = winTime >> 32;
815}
816int mingw_utime (const char *file_name, const struct utimbuf *times)
818{
819 FILETIME mft, aft;
820 int fh, rc;
821 DWORD attrs;
822 wchar_t wfilename[MAX_PATH];
823 if (xutftowcs_path(wfilename, file_name) < 0)
824 return -1;
825 /* must have write permission */
827 attrs = GetFileAttributesW(wfilename);
828 if (attrs != INVALID_FILE_ATTRIBUTES &&
829 (attrs & FILE_ATTRIBUTE_READONLY)) {
830 /* ignore errors here; open() will report them */
831 SetFileAttributesW(wfilename, attrs & ~FILE_ATTRIBUTE_READONLY);
832 }
833 if ((fh = _wopen(wfilename, O_RDWR | O_BINARY)) < 0) {
835 rc = -1;
836 goto revert_attrs;
837 }
838 if (times) {
840 time_t_to_filetime(times->modtime, &mft);
841 time_t_to_filetime(times->actime, &aft);
842 } else {
843 GetSystemTimeAsFileTime(&mft);
844 aft = mft;
845 }
846 if (!SetFileTime((HANDLE)_get_osfhandle(fh), NULL, &aft, &mft)) {
847 errno = EINVAL;
848 rc = -1;
849 } else
850 rc = 0;
851 close(fh);
852revert_attrs:
854 if (attrs != INVALID_FILE_ATTRIBUTES &&
855 (attrs & FILE_ATTRIBUTE_READONLY)) {
856 /* ignore errors again */
857 SetFileAttributesW(wfilename, attrs);
858 }
859 return rc;
860}
861#undef strftime
863size_t mingw_strftime(char *s, size_t max,
864 const char *format, const struct tm *tm)
865{
866 size_t ret = strftime(s, max, format, tm);
867 if (!ret && errno == EINVAL)
869 die("invalid strftime format: '%s'", format);
870 return ret;
871}
872unsigned int sleep (unsigned int seconds)
874{
875 Sleep(seconds*1000);
876 return 0;
877}
878char *mingw_mktemp(char *template)
880{
881 wchar_t wtemplate[MAX_PATH];
882 if (xutftowcs_path(wtemplate, template) < 0)
883 return NULL;
884 if (!_wmktemp(wtemplate))
885 return NULL;
886 if (xwcstoutf(template, wtemplate, strlen(template) + 1) < 0)
887 return NULL;
888 return template;
889}
890int mkstemp(char *template)
892{
893 char *filename = mktemp(template);
894 if (filename == NULL)
895 return -1;
896 return open(filename, O_RDWR | O_CREAT, 0600);
897}
898int gettimeofday(struct timeval *tv, void *tz)
900{
901 FILETIME ft;
902 long long hnsec;
903 GetSystemTimeAsFileTime(&ft);
905 hnsec = filetime_to_hnsec(&ft);
906 tv->tv_sec = hnsec / 10000000;
907 tv->tv_usec = (hnsec % 10000000) / 10;
908 return 0;
909}
910int pipe(int filedes[2])
912{
913 HANDLE h[2];
914 /* this creates non-inheritable handles */
916 if (!CreatePipe(&h[0], &h[1], NULL, 8192)) {
917 errno = err_win_to_posix(GetLastError());
918 return -1;
919 }
920 filedes[0] = _open_osfhandle(HCAST(int, h[0]), O_NOINHERIT);
921 if (filedes[0] < 0) {
922 CloseHandle(h[0]);
923 CloseHandle(h[1]);
924 return -1;
925 }
926 filedes[1] = _open_osfhandle(HCAST(int, h[1]), O_NOINHERIT);
927 if (filedes[1] < 0) {
928 close(filedes[0]);
929 CloseHandle(h[1]);
930 return -1;
931 }
932 return 0;
933}
934struct tm *gmtime_r(const time_t *timep, struct tm *result)
936{
937 /* gmtime() in MSVCRT.DLL is thread-safe, but not reentrant */
938 memcpy(result, gmtime(timep), sizeof(struct tm));
939 return result;
940}
941struct tm *localtime_r(const time_t *timep, struct tm *result)
943{
944 /* localtime() in MSVCRT.DLL is thread-safe, but not reentrant */
945 memcpy(result, localtime(timep), sizeof(struct tm));
946 return result;
947}
948char *mingw_getcwd(char *pointer, int len)
950{
951 wchar_t cwd[MAX_PATH], wpointer[MAX_PATH];
952 DWORD ret = GetCurrentDirectoryW(ARRAY_SIZE(cwd), cwd);
953 if (!ret || ret >= ARRAY_SIZE(cwd)) {
955 errno = ret ? ENAMETOOLONG : err_win_to_posix(GetLastError());
956 return NULL;
957 }
958 ret = GetLongPathNameW(cwd, wpointer, ARRAY_SIZE(wpointer));
959 if (!ret && GetLastError() == ERROR_ACCESS_DENIED) {
960 HANDLE hnd = CreateFileW(cwd, 0,
961 FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE, NULL,
962 OPEN_EXISTING, FILE_FLAG_BACKUP_SEMANTICS, NULL);
963 if (hnd == INVALID_HANDLE_VALUE)
964 return NULL;
965 ret = GetFinalPathNameByHandleW(hnd, wpointer, ARRAY_SIZE(wpointer), 0);
966 CloseHandle(hnd);
967 if (!ret || ret >= ARRAY_SIZE(wpointer))
968 return NULL;
969 if (xwcstoutf(pointer, normalize_ntpath(wpointer), len) < 0)
970 return NULL;
971 return pointer;
972 }
973 if (!ret || ret >= ARRAY_SIZE(wpointer))
974 return NULL;
975 if (xwcstoutf(pointer, wpointer, len) < 0)
976 return NULL;
977 convert_slashes(pointer);
978 return pointer;
979}
980/*
982 * See http://msdn2.microsoft.com/en-us/library/17w5ykft(vs.71).aspx
983 * (Parsing C++ Command-Line Arguments)
984 */
985static const char *quote_arg(const char *arg)
986{
987 /* count chars to quote */
988 int len = 0, n = 0;
989 int force_quotes = 0;
990 char *q, *d;
991 const char *p = arg;
992 if (!*p) force_quotes = 1;
993 while (*p) {
994 if (isspace(*p) || *p == '*' || *p == '?' || *p == '{' || *p == '\'')
995 force_quotes = 1;
996 else if (*p == '"')
997 n++;
998 else if (*p == '\\') {
999 int count = 0;
1000 while (*p == '\\') {
1001 count++;
1002 p++;
1003 len++;
1004 }
1005 if (*p == '"')
1006 n += count*2 + 1;
1007 continue;
1008 }
1009 len++;
1010 p++;
1011 }
1012 if (!force_quotes && n == 0)
1013 return arg;
1014 /* insert \ where necessary */
1016 d = q = xmalloc(st_add3(len, n, 3));
1017 *d++ = '"';
1018 while (*arg) {
1019 if (*arg == '"')
1020 *d++ = '\\';
1021 else if (*arg == '\\') {
1022 int count = 0;
1023 while (*arg == '\\') {
1024 count++;
1025 *d++ = *arg++;
1026 }
1027 if (*arg == '"') {
1028 while (count-- > 0)
1029 *d++ = '\\';
1030 *d++ = '\\';
1031 }
1032 }
1033 *d++ = *arg++;
1034 }
1035 *d++ = '"';
1036 *d++ = 0;
1037 return q;
1038}
1039static const char *parse_interpreter(const char *cmd)
1041{
1042 static char buf[100];
1043 char *p, *opt;
1044 int n, fd;
1045 /* don't even try a .exe */
1047 n = strlen(cmd);
1048 if (n >= 4 && !strcasecmp(cmd+n-4, ".exe"))
1049 return NULL;
1050 fd = open(cmd, O_RDONLY);
1052 if (fd < 0)
1053 return NULL;
1054 n = read(fd, buf, sizeof(buf)-1);
1055 close(fd);
1056 if (n < 4) /* at least '#!/x' and not error */
1057 return NULL;
1058 if (buf[0] != '#' || buf[1] != '!')
1060 return NULL;
1061 buf[n] = '\0';
1062 p = buf + strcspn(buf, "\r\n");
1063 if (!*p)
1064 return NULL;
1065 *p = '\0';
1067 if (!(p = strrchr(buf+2, '/')) && !(p = strrchr(buf+2, '\\')))
1068 return NULL;
1069 /* strip options */
1070 if ((opt = strchr(p+1, ' ')))
1071 *opt = '\0';
1072 return p+1;
1073}
1074/*
1076 * exe_only means that we only want to detect .exe files, but not scripts
1077 * (which do not have an extension)
1078 */
1079static char *lookup_prog(const char *dir, int dirlen, const char *cmd,
1080 int isexe, int exe_only)
1081{
1082 char path[MAX_PATH];
1083 snprintf(path, sizeof(path), "%.*s\\%s.exe", dirlen, dir, cmd);
1084 if (!isexe && access(path, F_OK) == 0)
1086 return xstrdup(path);
1087 path[strlen(path)-4] = '\0';
1088 if ((!exe_only || isexe) && access(path, F_OK) == 0)
1089 if (!(GetFileAttributes(path) & FILE_ATTRIBUTE_DIRECTORY))
1090 return xstrdup(path);
1091 return NULL;
1092}
1093/*
1095 * Determines the absolute path of cmd using the split path in path.
1096 * If cmd contains a slash or backslash, no lookup is performed.
1097 */
1098static char *path_lookup(const char *cmd, int exe_only)
1099{
1100 const char *path;
1101 char *prog = NULL;
1102 int len = strlen(cmd);
1103 int isexe = len >= 4 && !strcasecmp(cmd+len-4, ".exe");
1104 if (strchr(cmd, '/') || strchr(cmd, '\\'))
1106 return xstrdup(cmd);
1107 path = mingw_getenv("PATH");
1109 if (!path)
1110 return NULL;
1111 while (!prog) {
1113 const char *sep = strchrnul(path, ';');
1114 int dirlen = sep - path;
1115 if (dirlen)
1116 prog = lookup_prog(path, dirlen, cmd, isexe, exe_only);
1117 if (!*sep)
1118 break;
1119 path = sep + 1;
1120 }
1121 return prog;
1123}
1124static int do_putenv(char **env, const char *name, int size, int free_old);
1126/* used number of elements of environ array, including terminating NULL */
1128static int environ_size = 0;
1129/* allocated size of environ array, in bytes */
1130static int environ_alloc = 0;
1131/*
1133 * Create environment block suitable for CreateProcess. Merges current
1134 * process environment and the supplied environment changes.
1135 */
1136static wchar_t *make_environment_block(char **deltaenv)
1137{
1138 wchar_t *wenvblk = NULL;
1139 char **tmpenv;
1140 int i = 0, size = environ_size, wenvsz = 0, wenvpos = 0;
1141 while (deltaenv && deltaenv[i])
1143 i++;
1144 /* copy the environment, leaving space for changes */
1146 ALLOC_ARRAY(tmpenv, size + i);
1147 memcpy(tmpenv, environ, size * sizeof(char*));
1148 /* merge supplied environment changes into the temporary environment */
1150 for (i = 0; deltaenv && deltaenv[i]; i++)
1151 size = do_putenv(tmpenv, deltaenv[i], size, 0);
1152 /* create environment block from temporary environment */
1154 for (i = 0; tmpenv[i]; i++) {
1155 size = 2 * strlen(tmpenv[i]) + 2; /* +2 for final \0 */
1156 ALLOC_GROW(wenvblk, (wenvpos + size) * sizeof(wchar_t), wenvsz);
1157 wenvpos += xutftowcs(&wenvblk[wenvpos], tmpenv[i], size) + 1;
1158 }
1159 /* add final \0 terminator */
1160 wenvblk[wenvpos] = 0;
1161 free(tmpenv);
1162 return wenvblk;
1163}
1164struct pinfo_t {
1166 struct pinfo_t *next;
1167 pid_t pid;
1168 HANDLE proc;
1169};
1170static struct pinfo_t *pinfo = NULL;
1171CRITICAL_SECTION pinfo_cs;
1172static pid_t mingw_spawnve_fd(const char *cmd, const char **argv, char **deltaenv,
1174 const char *dir,
1175 int prepend_cmd, int fhin, int fhout, int fherr)
1176{
1177 STARTUPINFOW si;
1178 PROCESS_INFORMATION pi;
1179 struct strbuf args;
1180 wchar_t wcmd[MAX_PATH], wdir[MAX_PATH], *wargs, *wenvblk = NULL;
1181 unsigned flags = CREATE_UNICODE_ENVIRONMENT;
1182 BOOL ret;
1183 /* Determine whether or not we are associated to a console */
1185 HANDLE cons = CreateFile("CONOUT$", GENERIC_WRITE,
1186 FILE_SHARE_WRITE, NULL, OPEN_EXISTING,
1187 FILE_ATTRIBUTE_NORMAL, NULL);
1188 if (cons == INVALID_HANDLE_VALUE) {
1189 /* There is no console associated with this process.
1190 * Since the child is a console process, Windows
1191 * would normally create a console window. But
1192 * since we'll be redirecting std streams, we do
1193 * not need the console.
1194 * It is necessary to use DETACHED_PROCESS
1195 * instead of CREATE_NO_WINDOW to make ssh
1196 * recognize that it has no console.
1197 */
1198 flags |= DETACHED_PROCESS;
1199 } else {
1200 /* There is already a console. If we specified
1201 * DETACHED_PROCESS here, too, Windows would
1202 * disassociate the child from the console.
1203 * The same is true for CREATE_NO_WINDOW.
1204 * Go figure!
1205 */
1206 CloseHandle(cons);
1207 }
1208 memset(&si, 0, sizeof(si));
1209 si.cb = sizeof(si);
1210 si.dwFlags = STARTF_USESTDHANDLES;
1211 si.hStdInput = winansi_get_osfhandle(fhin);
1212 si.hStdOutput = winansi_get_osfhandle(fhout);
1213 si.hStdError = winansi_get_osfhandle(fherr);
1214 if (xutftowcs_path(wcmd, cmd) < 0)
1216 return -1;
1217 if (dir && xutftowcs_path(wdir, dir) < 0)
1218 return -1;
1219 /* concatenate argv, quoting args as we go */
1221 strbuf_init(&args, 0);
1222 if (prepend_cmd) {
1223 char *quoted = (char *)quote_arg(cmd);
1224 strbuf_addstr(&args, quoted);
1225 if (quoted != cmd)
1226 free(quoted);
1227 }
1228 for (; *argv; argv++) {
1229 char *quoted = (char *)quote_arg(*argv);
1230 if (*args.buf)
1231 strbuf_addch(&args, ' ');
1232 strbuf_addstr(&args, quoted);
1233 if (quoted != *argv)
1234 free(quoted);
1235 }
1236 ALLOC_ARRAY(wargs, st_add(st_mult(2, args.len), 1));
1238 xutftowcs(wargs, args.buf, 2 * args.len + 1);
1239 strbuf_release(&args);
1240 wenvblk = make_environment_block(deltaenv);
1242 memset(&pi, 0, sizeof(pi));
1244 ret = CreateProcessW(wcmd, wargs, NULL, NULL, TRUE, flags,
1245 wenvblk, dir ? wdir : NULL, &si, &pi);
1246 free(wenvblk);
1248 free(wargs);
1249 if (!ret) {
1251 errno = ENOENT;
1252 return -1;
1253 }
1254 CloseHandle(pi.hThread);
1255 /*
1257 * The process ID is the human-readable identifier of the process
1258 * that we want to present in log and error messages. The handle
1259 * is not useful for this purpose. But we cannot close it, either,
1260 * because it is not possible to turn a process ID into a process
1261 * handle after the process terminated.
1262 * Keep the handle in a list for waitpid.
1263 */
1264 EnterCriticalSection(&pinfo_cs);
1265 {
1266 struct pinfo_t *info = xmalloc(sizeof(struct pinfo_t));
1267 info->pid = pi.dwProcessId;
1268 info->proc = pi.hProcess;
1269 info->next = pinfo;
1270 pinfo = info;
1271 }
1272 LeaveCriticalSection(&pinfo_cs);
1273 return (pid_t)pi.dwProcessId;
1275}
1276static pid_t mingw_spawnv(const char *cmd, const char **argv, int prepend_cmd)
1278{
1279 return mingw_spawnve_fd(cmd, argv, NULL, NULL, prepend_cmd, 0, 1, 2);
1280}
1281pid_t mingw_spawnvpe(const char *cmd, const char **argv, char **deltaenv,
1283 const char *dir,
1284 int fhin, int fhout, int fherr)
1285{
1286 pid_t pid;
1287 char *prog = path_lookup(cmd, 0);
1288 if (!prog) {
1290 errno = ENOENT;
1291 pid = -1;
1292 }
1293 else {
1294 const char *interpr = parse_interpreter(prog);
1295 if (interpr) {
1297 const char *argv0 = argv[0];
1298 char *iprog = path_lookup(interpr, 1);
1299 argv[0] = prog;
1300 if (!iprog) {
1301 errno = ENOENT;
1302 pid = -1;
1303 }
1304 else {
1305 pid = mingw_spawnve_fd(iprog, argv, deltaenv, dir, 1,
1306 fhin, fhout, fherr);
1307 free(iprog);
1308 }
1309 argv[0] = argv0;
1310 }
1311 else
1312 pid = mingw_spawnve_fd(prog, argv, deltaenv, dir, 0,
1313 fhin, fhout, fherr);
1314 free(prog);
1315 }
1316 return pid;
1317}
1318static int try_shell_exec(const char *cmd, char *const *argv)
1320{
1321 const char *interpr = parse_interpreter(cmd);
1322 char *prog;
1323 int pid = 0;
1324 if (!interpr)
1326 return 0;
1327 prog = path_lookup(interpr, 1);
1328 if (prog) {
1329 int argc = 0;
1330 const char **argv2;
1331 while (argv[argc]) argc++;
1332 ALLOC_ARRAY(argv2, argc + 1);
1333 argv2[0] = (char *)cmd; /* full path to the script file */
1334 memcpy(&argv2[1], &argv[1], sizeof(*argv) * argc);
1335 pid = mingw_spawnv(prog, argv2, 1);
1336 if (pid >= 0) {
1337 int status;
1338 if (waitpid(pid, &status, 0) < 0)
1339 status = 255;
1340 exit(status);
1341 }
1342 pid = 1; /* indicate that we tried but failed */
1343 free(prog);
1344 free(argv2);
1345 }
1346 return pid;
1347}
1348int mingw_execv(const char *cmd, char *const *argv)
1350{
1351 /* check if git_command is a shell script */
1352 if (!try_shell_exec(cmd, argv)) {
1353 int pid, status;
1354 pid = mingw_spawnv(cmd, (const char **)argv, 0);
1356 if (pid < 0)
1357 return -1;
1358 if (waitpid(pid, &status, 0) < 0)
1359 status = 255;
1360 exit(status);
1361 }
1362 return -1;
1363}
1364int mingw_execvp(const char *cmd, char *const *argv)
1366{
1367 char *prog = path_lookup(cmd, 0);
1368 if (prog) {
1370 mingw_execv(prog, argv);
1371 free(prog);
1372 } else
1373 errno = ENOENT;
1374 return -1;
1376}
1377int mingw_kill(pid_t pid, int sig)
1379{
1380 if (pid > 0 && sig == SIGTERM) {
1381 HANDLE h = OpenProcess(PROCESS_TERMINATE, FALSE, pid);
1382 if (TerminateProcess(h, -1)) {
1384 CloseHandle(h);
1385 return 0;
1386 }
1387 errno = err_win_to_posix(GetLastError());
1389 CloseHandle(h);
1390 return -1;
1391 } else if (pid > 0 && sig == 0) {
1392 HANDLE h = OpenProcess(PROCESS_QUERY_INFORMATION, FALSE, pid);
1393 if (h) {
1394 CloseHandle(h);
1395 return 0;
1396 }
1397 }
1398 errno = EINVAL;
1400 return -1;
1401}
1402/*
1404 * Compare environment entries by key (i.e. stopping at '=' or '\0').
1405 */
1406static int compareenv(const void *v1, const void *v2)
1407{
1408 const char *e1 = *(const char**)v1;
1409 const char *e2 = *(const char**)v2;
1410 for (;;) {
1412 int c1 = *e1++;
1413 int c2 = *e2++;
1414 c1 = (c1 == '=') ? 0 : tolower(c1);
1415 c2 = (c2 == '=') ? 0 : tolower(c2);
1416 if (c1 > c2)
1417 return 1;
1418 if (c1 < c2)
1419 return -1;
1420 if (c1 == 0)
1421 return 0;
1422 }
1423}
1424static int bsearchenv(char **env, const char *name, size_t size)
1426{
1427 unsigned low = 0, high = size;
1428 while (low < high) {
1429 unsigned mid = low + ((high - low) >> 1);
1430 int cmp = compareenv(&env[mid], &name);
1431 if (cmp < 0)
1432 low = mid + 1;
1433 else if (cmp > 0)
1434 high = mid;
1435 else
1436 return mid;
1437 }
1438 return ~low; /* not found, return 1's complement of insert position */
1439}
1440/*
1442 * If name contains '=', then sets the variable, otherwise it unsets it
1443 * Size includes the terminating NULL. Env must have room for size + 1 entries
1444 * (in case of insert). Returns the new size. Optionally frees removed entries.
1445 */
1446static int do_putenv(char **env, const char *name, int size, int free_old)
1447{
1448 int i = bsearchenv(env, name, size - 1);
1449 /* optionally free removed / replaced entry */
1451 if (i >= 0 && free_old)
1452 free(env[i]);
1453 if (strchr(name, '=')) {
1455 /* if new value ('key=value') is specified, insert or replace entry */
1456 if (i < 0) {
1457 i = ~i;
1458 memmove(&env[i + 1], &env[i], (size - i) * sizeof(char*));
1459 size++;
1460 }
1461 env[i] = (char*) name;
1462 } else if (i >= 0) {
1463 /* otherwise ('key') remove existing entry */
1464 size--;
1465 memmove(&env[i], &env[i + 1], (size - i) * sizeof(char*));
1466 }
1467 return size;
1468}
1469char *mingw_getenv(const char *name)
1471{
1472 char *value;
1473 int pos = bsearchenv(environ, name, environ_size - 1);
1474 if (pos < 0)
1475 return NULL;
1476 value = strchr(environ[pos], '=');
1477 return value ? &value[1] : NULL;
1478}
1479int mingw_putenv(const char *namevalue)
1481{
1482 ALLOC_GROW(environ, (environ_size + 1) * sizeof(char*), environ_alloc);
1483 environ_size = do_putenv(environ, namevalue, environ_size, 1);
1484 return 0;
1485}
1486/*
1488 * Note, this isn't a complete replacement for getaddrinfo. It assumes
1489 * that service contains a numerical port, or that it is null. It
1490 * does a simple search using gethostbyname, and returns one IPv4 host
1491 * if one was found.
1492 */
1493static int WSAAPI getaddrinfo_stub(const char *node, const char *service,
1494 const struct addrinfo *hints,
1495 struct addrinfo **res)
1496{
1497 struct hostent *h = NULL;
1498 struct addrinfo *ai;
1499 struct sockaddr_in *sin;
1500 if (node) {
1502 h = gethostbyname(node);
1503 if (!h)
1504 return WSAGetLastError();
1505 }
1506 ai = xmalloc(sizeof(struct addrinfo));
1508 *res = ai;
1509 ai->ai_flags = 0;
1510 ai->ai_family = AF_INET;
1511 ai->ai_socktype = hints ? hints->ai_socktype : 0;
1512 switch (ai->ai_socktype) {
1513 case SOCK_STREAM:
1514 ai->ai_protocol = IPPROTO_TCP;
1515 break;
1516 case SOCK_DGRAM:
1517 ai->ai_protocol = IPPROTO_UDP;
1518 break;
1519 default:
1520 ai->ai_protocol = 0;
1521 break;
1522 }
1523 ai->ai_addrlen = sizeof(struct sockaddr_in);
1524 if (hints && (hints->ai_flags & AI_CANONNAME))
1525 ai->ai_canonname = h ? xstrdup(h->h_name) : NULL;
1526 else
1527 ai->ai_canonname = NULL;
1528 sin = xcalloc(1, ai->ai_addrlen);
1530 sin->sin_family = AF_INET;
1531 /* Note: getaddrinfo is supposed to allow service to be a string,
1532 * which should be looked up using getservbyname. This is
1533 * currently not implemented */
1534 if (service)
1535 sin->sin_port = htons(atoi(service));
1536 if (h)
1537 sin->sin_addr = *(struct in_addr *)h->h_addr;
1538 else if (hints && (hints->ai_flags & AI_PASSIVE))
1539 sin->sin_addr.s_addr = INADDR_ANY;
1540 else
1541 sin->sin_addr.s_addr = INADDR_LOOPBACK;
1542 ai->ai_addr = (struct sockaddr *)sin;
1543 ai->ai_next = NULL;
1544 return 0;
1545}
1546static void WSAAPI freeaddrinfo_stub(struct addrinfo *res)
1548{
1549 free(res->ai_canonname);
1550 free(res->ai_addr);
1551 free(res);
1552}
1553static int WSAAPI getnameinfo_stub(const struct sockaddr *sa, socklen_t salen,
1555 char *host, DWORD hostlen,
1556 char *serv, DWORD servlen, int flags)
1557{
1558 const struct sockaddr_in *sin = (const struct sockaddr_in *)sa;
1559 if (sa->sa_family != AF_INET)
1560 return EAI_FAMILY;
1561 if (!host && !serv)
1562 return EAI_NONAME;
1563 if (host && hostlen > 0) {
1565 struct hostent *ent = NULL;
1566 if (!(flags & NI_NUMERICHOST))
1567 ent = gethostbyaddr((const char *)&sin->sin_addr,
1568 sizeof(sin->sin_addr), AF_INET);
1569 if (ent)
1571 snprintf(host, hostlen, "%s", ent->h_name);
1572 else if (flags & NI_NAMEREQD)
1573 return EAI_NONAME;
1574 else
1575 snprintf(host, hostlen, "%s", inet_ntoa(sin->sin_addr));
1576 }
1577 if (serv && servlen > 0) {
1579 struct servent *ent = NULL;
1580 if (!(flags & NI_NUMERICSERV))
1581 ent = getservbyport(sin->sin_port,
1582 flags & NI_DGRAM ? "udp" : "tcp");
1583 if (ent)
1585 snprintf(serv, servlen, "%s", ent->s_name);
1586 else
1587 snprintf(serv, servlen, "%d", ntohs(sin->sin_port));
1588 }
1589 return 0;
1591}
1592static HMODULE ipv6_dll = NULL;
1594static void (WSAAPI *ipv6_freeaddrinfo)(struct addrinfo *res);
1595static int (WSAAPI *ipv6_getaddrinfo)(const char *node, const char *service,
1596 const struct addrinfo *hints,
1597 struct addrinfo **res);
1598static int (WSAAPI *ipv6_getnameinfo)(const struct sockaddr *sa, socklen_t salen,
1599 char *host, DWORD hostlen,
1600 char *serv, DWORD servlen, int flags);
1601/*
1602 * gai_strerror is an inline function in the ws2tcpip.h header, so we
1603 * don't need to try to load that one dynamically.
1604 */
1605static void socket_cleanup(void)
1607{
1608 WSACleanup();
1609 if (ipv6_dll)
1610 FreeLibrary(ipv6_dll);
1611 ipv6_dll = NULL;
1612 ipv6_freeaddrinfo = freeaddrinfo_stub;
1613 ipv6_getaddrinfo = getaddrinfo_stub;
1614 ipv6_getnameinfo = getnameinfo_stub;
1615}
1616static void ensure_socket_initialization(void)
1618{
1619 WSADATA wsa;
1620 static int initialized = 0;
1621 const char *libraries[] = { "ws2_32.dll", "wship6.dll", NULL };
1622 const char **name;
1623 if (initialized)
1625 return;
1626 if (WSAStartup(MAKEWORD(2,2), &wsa))
1628 die("unable to initialize winsock subsystem, error %d",
1629 WSAGetLastError());
1630 for (name = libraries; *name; name++) {
1632 ipv6_dll = LoadLibraryExA(*name, NULL,
1633 LOAD_LIBRARY_SEARCH_SYSTEM32);
1634 if (!ipv6_dll)
1635 continue;
1636 ipv6_freeaddrinfo = (void (WSAAPI *)(struct addrinfo *))
1638 GetProcAddress(ipv6_dll, "freeaddrinfo");
1639 ipv6_getaddrinfo = (int (WSAAPI *)(const char *, const char *,
1640 const struct addrinfo *,
1641 struct addrinfo **))
1642 GetProcAddress(ipv6_dll, "getaddrinfo");
1643 ipv6_getnameinfo = (int (WSAAPI *)(const struct sockaddr *,
1644 socklen_t, char *, DWORD,
1645 char *, DWORD, int))
1646 GetProcAddress(ipv6_dll, "getnameinfo");
1647 if (!ipv6_freeaddrinfo || !ipv6_getaddrinfo || !ipv6_getnameinfo) {
1648 FreeLibrary(ipv6_dll);
1649 ipv6_dll = NULL;
1650 } else
1651 break;
1652 }
1653 if (!ipv6_freeaddrinfo || !ipv6_getaddrinfo || !ipv6_getnameinfo) {
1654 ipv6_freeaddrinfo = freeaddrinfo_stub;
1655 ipv6_getaddrinfo = getaddrinfo_stub;
1656 ipv6_getnameinfo = getnameinfo_stub;
1657 }
1658 atexit(socket_cleanup);
1660 initialized = 1;
1661}
1662#undef gethostname
1664int mingw_gethostname(char *name, int namelen)
1665{
1666 ensure_socket_initialization();
1667 return gethostname(name, namelen);
1668}
1669#undef gethostbyname
1671struct hostent *mingw_gethostbyname(const char *host)
1672{
1673 ensure_socket_initialization();
1674 return gethostbyname(host);
1675}
1676void mingw_freeaddrinfo(struct addrinfo *res)
1678{
1679 ipv6_freeaddrinfo(res);
1680}
1681int mingw_getaddrinfo(const char *node, const char *service,
1683 const struct addrinfo *hints, struct addrinfo **res)
1684{
1685 ensure_socket_initialization();
1686 return ipv6_getaddrinfo(node, service, hints, res);
1687}
1688int mingw_getnameinfo(const struct sockaddr *sa, socklen_t salen,
1690 char *host, DWORD hostlen, char *serv, DWORD servlen,
1691 int flags)
1692{
1693 ensure_socket_initialization();
1694 return ipv6_getnameinfo(sa, salen, host, hostlen, serv, servlen, flags);
1695}
1696int mingw_socket(int domain, int type, int protocol)
1698{
1699 int sockfd;
1700 SOCKET s;
1701 ensure_socket_initialization();
1703 s = WSASocket(domain, type, protocol, NULL, 0, 0);
1704 if (s == INVALID_SOCKET) {
1705 /*
1706 * WSAGetLastError() values are regular BSD error codes
1707 * biased by WSABASEERR.
1708 * However, strerror() does not know about networking
1709 * specific errors, which are values beginning at 38 or so.
1710 * Therefore, we choose to leave the biased error code
1711 * in errno so that _if_ someone looks up the code somewhere,
1712 * then it is at least the number that are usually listed.
1713 */
1714 errno = WSAGetLastError();
1715 return -1;
1716 }
1717 /* convert into a file descriptor */
1718 if ((sockfd = _open_osfhandle(s, O_RDWR|O_BINARY)) < 0) {
1719 closesocket(s);
1720 return error("unable to make a socket file descriptor: %s",
1721 strerror(errno));
1722 }
1723 return sockfd;
1724}
1725#undef connect
1727int mingw_connect(int sockfd, struct sockaddr *sa, size_t sz)
1728{
1729 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
1730 return connect(s, sa, sz);
1731}
1732#undef bind
1734int mingw_bind(int sockfd, struct sockaddr *sa, size_t sz)
1735{
1736 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
1737 return bind(s, sa, sz);
1738}
1739#undef setsockopt
1741int mingw_setsockopt(int sockfd, int lvl, int optname, void *optval, int optlen)
1742{
1743 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
1744 return setsockopt(s, lvl, optname, (const char*)optval, optlen);
1745}
1746#undef shutdown
1748int mingw_shutdown(int sockfd, int how)
1749{
1750 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
1751 return shutdown(s, how);
1752}
1753#undef listen
1755int mingw_listen(int sockfd, int backlog)
1756{
1757 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
1758 return listen(s, backlog);
1759}
1760#undef accept
1762int mingw_accept(int sockfd1, struct sockaddr *sa, socklen_t *sz)
1763{
1764 int sockfd2;
1765 SOCKET s1 = (SOCKET)_get_osfhandle(sockfd1);
1767 SOCKET s2 = accept(s1, sa, sz);
1768 /* convert into a file descriptor */
1770 if ((sockfd2 = _open_osfhandle(s2, O_RDWR|O_BINARY)) < 0) {
1771 int err = errno;
1772 closesocket(s2);
1773 return error("unable to make a socket file descriptor: %s",
1774 strerror(err));
1775 }
1776 return sockfd2;
1777}
1778#undef rename
1780int mingw_rename(const char *pold, const char *pnew)
1781{
1782 DWORD attrs, gle;
1783 int tries = 0;
1784 wchar_t wpold[MAX_PATH], wpnew[MAX_PATH];
1785 if (xutftowcs_path(wpold, pold) < 0 || xutftowcs_path(wpnew, pnew) < 0)
1786 return -1;
1787 /*
1789 * Try native rename() first to get errno right.
1790 * It is based on MoveFile(), which cannot overwrite existing files.
1791 */
1792 if (!_wrename(wpold, wpnew))
1793 return 0;
1794 if (errno != EEXIST)
1795 return -1;
1796repeat:
1797 if (MoveFileExW(wpold, wpnew, MOVEFILE_REPLACE_EXISTING))
1798 return 0;
1799 /* TODO: translate more errors */
1800 gle = GetLastError();
1801 if (gle == ERROR_ACCESS_DENIED &&
1802 (attrs = GetFileAttributesW(wpnew)) != INVALID_FILE_ATTRIBUTES) {
1803 if (attrs & FILE_ATTRIBUTE_DIRECTORY) {
1804 DWORD attrsold = GetFileAttributesW(wpold);
1805 if (attrsold == INVALID_FILE_ATTRIBUTES ||
1806 !(attrsold & FILE_ATTRIBUTE_DIRECTORY))
1807 errno = EISDIR;
1808 else if (!_wrmdir(wpnew))
1809 goto repeat;
1810 return -1;
1811 }
1812 if ((attrs & FILE_ATTRIBUTE_READONLY) &&
1813 SetFileAttributesW(wpnew, attrs & ~FILE_ATTRIBUTE_READONLY)) {
1814 if (MoveFileExW(wpold, wpnew, MOVEFILE_REPLACE_EXISTING))
1815 return 0;
1816 gle = GetLastError();
1817 /* revert file attributes on failure */
1818 SetFileAttributesW(wpnew, attrs);
1819 }
1820 }
1821 if (tries < ARRAY_SIZE(delay) && gle == ERROR_ACCESS_DENIED) {
1822 /*
1823 * We assume that some other process had the source or
1824 * destination file open at the wrong moment and retry.
1825 * In order to give the other process a higher chance to
1826 * complete its operation, we give up our time slice now.
1827 * If we have to retry again, we do sleep a bit.
1828 */
1829 Sleep(delay[tries]);
1830 tries++;
1831 goto repeat;
1832 }
1833 if (gle == ERROR_ACCESS_DENIED &&
1834 ask_yes_no_if_possible("Rename from '%s' to '%s' failed. "
1835 "Should I try again?", pold, pnew))
1836 goto repeat;
1837 errno = EACCES;
1839 return -1;
1840}
1841/*
1843 * Note that this doesn't return the actual pagesize, but
1844 * the allocation granularity. If future Windows specific git code
1845 * needs the real getpagesize function, we need to find another solution.
1846 */
1847int mingw_getpagesize(void)
1848{
1849 SYSTEM_INFO si;
1850 GetSystemInfo(&si);
1851 return si.dwAllocationGranularity;
1852}
1853/* See https://msdn.microsoft.com/en-us/library/windows/desktop/ms724435.aspx */
1855enum EXTENDED_NAME_FORMAT {
1856 NameDisplay = 3,
1857 NameUserPrincipal = 8
1858};
1859static char *get_extended_user_info(enum EXTENDED_NAME_FORMAT type)
1861{
1862 DECLARE_PROC_ADDR(secur32.dll, BOOL, GetUserNameExW,
1863 enum EXTENDED_NAME_FORMAT, LPCWSTR, PULONG);
1864 static wchar_t wbuffer[1024];
1865 DWORD len;
1866 if (!INIT_PROC_ADDR(GetUserNameExW))
1868 return NULL;
1869 len = ARRAY_SIZE(wbuffer);
1871 if (GetUserNameExW(type, wbuffer, &len)) {
1872 char *converted = xmalloc((len *= 3));
1873 if (xwcstoutf(converted, wbuffer, len) >= 0)
1874 return converted;
1875 free(converted);
1876 }
1877 return NULL;
1879}
1880char *mingw_query_user_email(void)
1882{
1883 return get_extended_user_info(NameUserPrincipal);
1884}
1885struct passwd *getpwuid(int uid)
1887{
1888 static unsigned initialized;
1889 static char user_name[100];
1890 static struct passwd *p;
1891 DWORD len;
1892 if (initialized)
1894 return p;
1895 len = sizeof(user_name);
1897 if (!GetUserName(user_name, &len)) {
1898 initialized = 1;
1899 return NULL;
1900 }
1901 p = xmalloc(sizeof(*p));
1903 p->pw_name = user_name;
1904 p->pw_gecos = get_extended_user_info(NameDisplay);
1905 if (!p->pw_gecos)
1906 p->pw_gecos = "unknown";
1907 p->pw_dir = NULL;
1908 initialized = 1;
1910 return p;
1911}
1912static HANDLE timer_event;
1914static HANDLE timer_thread;
1915static int timer_interval;
1916static int one_shot;
1917static sig_handler_t timer_fn = SIG_DFL, sigint_fn = SIG_DFL;
1918/* The timer works like this:
1920 * The thread, ticktack(), is a trivial routine that most of the time
1921 * only waits to receive the signal to terminate. The main thread tells
1922 * the thread to terminate by setting the timer_event to the signalled
1923 * state.
1924 * But ticktack() interrupts the wait state after the timer's interval
1925 * length to call the signal handler.
1926 */
1927static unsigned __stdcall ticktack(void *dummy)
1929{
1930 while (WaitForSingleObject(timer_event, timer_interval) == WAIT_TIMEOUT) {
1931 mingw_raise(SIGALRM);
1932 if (one_shot)
1933 break;
1934 }
1935 return 0;
1936}
1937static int start_timer_thread(void)
1939{
1940 timer_event = CreateEvent(NULL, FALSE, FALSE, NULL);
1941 if (timer_event) {
1942 timer_thread = (HANDLE) _beginthreadex(NULL, 0, ticktack, NULL, 0, NULL);
1943 if (!timer_thread )
1944 return errno = ENOMEM,
1945 error("cannot start timer thread");
1946 } else
1947 return errno = ENOMEM,
1948 error("cannot allocate resources for timer");
1949 return 0;
1950}
1951static void stop_timer_thread(void)
1953{
1954 if (timer_event)
1955 SetEvent(timer_event); /* tell thread to terminate */
1956 if (timer_thread) {
1957 int rc = WaitForSingleObject(timer_thread, 1000);
1958 if (rc == WAIT_TIMEOUT)
1959 error("timer thread did not terminate timely");
1960 else if (rc != WAIT_OBJECT_0)
1961 error("waiting for timer thread failed: %lu",
1962 GetLastError());
1963 CloseHandle(timer_thread);
1964 }
1965 if (timer_event)
1966 CloseHandle(timer_event);
1967 timer_event = NULL;
1968 timer_thread = NULL;
1969}
1970static inline int is_timeval_eq(const struct timeval *i1, const struct timeval *i2)
1972{
1973 return i1->tv_sec == i2->tv_sec && i1->tv_usec == i2->tv_usec;
1974}
1975int setitimer(int type, struct itimerval *in, struct itimerval *out)
1977{
1978 static const struct timeval zero;
1979 static int atexit_done;
1980 if (out != NULL)
1982 return errno = EINVAL,
1983 error("setitimer param 3 != NULL not implemented");
1984 if (!is_timeval_eq(&in->it_interval, &zero) &&
1985 !is_timeval_eq(&in->it_interval, &in->it_value))
1986 return errno = EINVAL,
1987 error("setitimer: it_interval must be zero or eq it_value");
1988 if (timer_thread)
1990 stop_timer_thread();
1991 if (is_timeval_eq(&in->it_value, &zero) &&
1993 is_timeval_eq(&in->it_interval, &zero))
1994 return 0;
1995 timer_interval = in->it_value.tv_sec * 1000 + in->it_value.tv_usec / 1000;
1997 one_shot = is_timeval_eq(&in->it_interval, &zero);
1998 if (!atexit_done) {
1999 atexit(stop_timer_thread);
2000 atexit_done = 1;
2001 }
2002 return start_timer_thread();
2003}
2004int sigaction(int sig, struct sigaction *in, struct sigaction *out)
2006{
2007 if (sig != SIGALRM)
2008 return errno = EINVAL,
2009 error("sigaction only implemented for SIGALRM");
2010 if (out != NULL)
2011 return errno = EINVAL,
2012 error("sigaction: param 3 != NULL not implemented");
2013 timer_fn = in->sa_handler;
2015 return 0;
2016}
2017#undef signal
2019sig_handler_t mingw_signal(int sig, sig_handler_t handler)
2020{
2021 sig_handler_t old;
2022 switch (sig) {
2024 case SIGALRM:
2025 old = timer_fn;
2026 timer_fn = handler;
2027 break;
2028 case SIGINT:
2030 old = sigint_fn;
2031 sigint_fn = handler;
2032 break;
2033 default:
2035 return signal(sig, handler);
2036 }
2037 return old;
2039}
2040#undef raise
2042int mingw_raise(int sig)
2043{
2044 switch (sig) {
2045 case SIGALRM:
2046 if (timer_fn == SIG_DFL) {
2047 if (isatty(STDERR_FILENO))
2048 fputs("Alarm clock\n", stderr);
2049 exit(128 + SIGALRM);
2050 } else if (timer_fn != SIG_IGN)
2051 timer_fn(SIGALRM);
2052 return 0;
2053 case SIGINT:
2055 if (sigint_fn == SIG_DFL)
2056 exit(128 + SIGINT);
2057 else if (sigint_fn != SIG_IGN)
2058 sigint_fn(SIGINT);
2059 return 0;
2060 default:
2062 return raise(sig);
2063 }
2064}
2065int link(const char *oldpath, const char *newpath)
2067{
2068 typedef BOOL (WINAPI *T)(LPCWSTR, LPCWSTR, LPSECURITY_ATTRIBUTES);
2069 static T create_hard_link = NULL;
2070 wchar_t woldpath[MAX_PATH], wnewpath[MAX_PATH];
2071 if (xutftowcs_path(woldpath, oldpath) < 0 ||
2072 xutftowcs_path(wnewpath, newpath) < 0)
2073 return -1;
2074 if (!create_hard_link) {
2076 create_hard_link = (T) GetProcAddress(
2077 GetModuleHandle("kernel32.dll"), "CreateHardLinkW");
2078 if (!create_hard_link)
2079 create_hard_link = (T)-1;
2080 }
2081 if (create_hard_link == (T)-1) {
2082 errno = ENOSYS;
2083 return -1;
2084 }
2085 if (!create_hard_link(wnewpath, woldpath, NULL)) {
2086 errno = err_win_to_posix(GetLastError());
2087 return -1;
2088 }
2089 return 0;
2090}
2091pid_t waitpid(pid_t pid, int *status, int options)
2093{
2094 HANDLE h = OpenProcess(SYNCHRONIZE | PROCESS_QUERY_INFORMATION,
2095 FALSE, pid);
2096 if (!h) {
2097 errno = ECHILD;
2098 return -1;
2099 }
2100 if (pid > 0 && options & WNOHANG) {
2102 if (WAIT_OBJECT_0 != WaitForSingleObject(h, 0)) {
2103 CloseHandle(h);
2104 return 0;
2105 }
2106 options &= ~WNOHANG;
2107 }
2108 if (options == 0) {
2110 struct pinfo_t **ppinfo;
2111 if (WaitForSingleObject(h, INFINITE) != WAIT_OBJECT_0) {
2112 CloseHandle(h);
2113 return 0;
2114 }
2115 if (status)
2117 GetExitCodeProcess(h, (LPDWORD)status);
2118 EnterCriticalSection(&pinfo_cs);
2120 ppinfo = &pinfo;
2122 while (*ppinfo) {
2123 struct pinfo_t *info = *ppinfo;
2124 if (info->pid == pid) {
2125 CloseHandle(info->proc);
2126 *ppinfo = info->next;
2127 free(info);
2128 break;
2129 }
2130 ppinfo = &info->next;
2131 }
2132 LeaveCriticalSection(&pinfo_cs);
2134 CloseHandle(h);
2136 return pid;
2137 }
2138 CloseHandle(h);
2139 errno = EINVAL;
2141 return -1;
2142}
2143int mingw_skip_dos_drive_prefix(char **path)
2145{
2146 int ret = has_dos_drive_prefix(*path);
2147 *path += ret;
2148 return ret;
2149}
2150int mingw_offset_1st_component(const char *path)
2152{
2153 char *pos = (char *)path;
2154 /* unc paths */
2156 if (!skip_dos_drive_prefix(&pos) &&
2157 is_dir_sep(pos[0]) && is_dir_sep(pos[1])) {
2158 /* skip server name */
2159 pos = strpbrk(pos + 2, "\\/");
2160 if (!pos)
2161 return 0; /* Error: malformed unc path */
2162 do {
2164 pos++;
2165 } while (*pos && !is_dir_sep(*pos));
2166 }
2167 return pos + is_dir_sep(*pos) - path;
2169}
2170int xutftowcsn(wchar_t *wcs, const char *utfs, size_t wcslen, int utflen)
2172{
2173 int upos = 0, wpos = 0;
2174 const unsigned char *utf = (const unsigned char*) utfs;
2175 if (!utf || !wcs || wcslen < 1) {
2176 errno = EINVAL;
2177 return -1;
2178 }
2179 /* reserve space for \0 */
2180 wcslen--;
2181 if (utflen < 0)
2182 utflen = INT_MAX;
2183 while (upos < utflen) {
2185 int c = utf[upos++] & 0xff;
2186 if (utflen == INT_MAX && c == 0)
2187 break;
2188 if (wpos >= wcslen) {
2190 wcs[wpos] = 0;
2191 errno = ERANGE;
2192 return -1;
2193 }
2194 if (c < 0x80) {
2196 /* ASCII */
2197 wcs[wpos++] = c;
2198 } else if (c >= 0xc2 && c < 0xe0 && upos < utflen &&
2199 (utf[upos] & 0xc0) == 0x80) {
2200 /* 2-byte utf-8 */
2201 c = ((c & 0x1f) << 6);
2202 c |= (utf[upos++] & 0x3f);
2203 wcs[wpos++] = c;
2204 } else if (c >= 0xe0 && c < 0xf0 && upos + 1 < utflen &&
2205 !(c == 0xe0 && utf[upos] < 0xa0) && /* over-long encoding */
2206 (utf[upos] & 0xc0) == 0x80 &&
2207 (utf[upos + 1] & 0xc0) == 0x80) {
2208 /* 3-byte utf-8 */
2209 c = ((c & 0x0f) << 12);
2210 c |= ((utf[upos++] & 0x3f) << 6);
2211 c |= (utf[upos++] & 0x3f);
2212 wcs[wpos++] = c;
2213 } else if (c >= 0xf0 && c < 0xf5 && upos + 2 < utflen &&
2214 wpos + 1 < wcslen &&
2215 !(c == 0xf0 && utf[upos] < 0x90) && /* over-long encoding */
2216 !(c == 0xf4 && utf[upos] >= 0x90) && /* > \u10ffff */
2217 (utf[upos] & 0xc0) == 0x80 &&
2218 (utf[upos + 1] & 0xc0) == 0x80 &&
2219 (utf[upos + 2] & 0xc0) == 0x80) {
2220 /* 4-byte utf-8: convert to \ud8xx \udcxx surrogate pair */
2221 c = ((c & 0x07) << 18);
2222 c |= ((utf[upos++] & 0x3f) << 12);
2223 c |= ((utf[upos++] & 0x3f) << 6);
2224 c |= (utf[upos++] & 0x3f);
2225 c -= 0x10000;
2226 wcs[wpos++] = 0xd800 | (c >> 10);
2227 wcs[wpos++] = 0xdc00 | (c & 0x3ff);
2228 } else if (c >= 0xa0) {
2229 /* invalid utf-8 byte, printable unicode char: convert 1:1 */
2230 wcs[wpos++] = c;
2231 } else {
2232 /* invalid utf-8 byte, non-printable unicode: convert to hex */
2233 static const char *hex = "0123456789abcdef";
2234 wcs[wpos++] = hex[c >> 4];
2235 if (wpos < wcslen)
2236 wcs[wpos++] = hex[c & 0x0f];
2237 }
2238 }
2239 wcs[wpos] = 0;
2240 return wpos;
2241}
2242int xwcstoutf(char *utf, const wchar_t *wcs, size_t utflen)
2244{
2245 if (!wcs || !utf || utflen < 1) {
2246 errno = EINVAL;
2247 return -1;
2248 }
2249 utflen = WideCharToMultiByte(CP_UTF8, 0, wcs, -1, utf, utflen, NULL, NULL);
2250 if (utflen)
2251 return utflen - 1;
2252 errno = ERANGE;
2253 return -1;
2254}
2255static void setup_windows_environment(void)
2257{
2258 char *tmp = getenv("TMPDIR");
2259 /* on Windows it is TMP and TEMP */
2261 if (!tmp) {
2262 if (!(tmp = getenv("TMP")))
2263 tmp = getenv("TEMP");
2264 if (tmp) {
2265 setenv("TMPDIR", tmp, 1);
2266 tmp = getenv("TMPDIR");
2267 }
2268 }
2269 if (tmp) {
2271 /*
2272 * Convert all dir separators to forward slashes,
2273 * to help shell commands called from the Git
2274 * executable (by not mistaking the dir separators
2275 * for escape characters).
2276 */
2277 convert_slashes(tmp);
2278 }
2279 /* simulate TERM to enable auto-color (see color.c) */
2281 if (!getenv("TERM"))
2282 setenv("TERM", "cygwin", 1);
2283}
2284/*
2286 * Disable MSVCRT command line wildcard expansion (__getmainargs called from
2287 * mingw startup code, see init.c in mingw runtime).
2288 */
2289int _CRT_glob = 0;
2290typedef struct {
2292 int newmode;
2293} _startupinfo;
2294extern int __wgetmainargs(int *argc, wchar_t ***argv, wchar_t ***env, int glob,
2296 _startupinfo *si);
2297static NORETURN void die_startup(void)
2299{
2300 fputs("fatal: not enough memory for initialization", stderr);
2301 exit(128);
2302}
2303static void *malloc_startup(size_t size)
2305{
2306 void *result = malloc(size);
2307 if (!result)
2308 die_startup();
2309 return result;
2310}
2311static char *wcstoutfdup_startup(char *buffer, const wchar_t *wcs, size_t len)
2313{
2314 len = xwcstoutf(buffer, wcs, len) + 1;
2315 return memcpy(malloc_startup(len), buffer, len);
2316}
2317static void maybe_redirect_std_handle(const wchar_t *key, DWORD std_id, int fd,
2319 DWORD desired_access, DWORD flags)
2320{
2321 DWORD create_flag = fd ? OPEN_ALWAYS : OPEN_EXISTING;
2322 wchar_t buf[MAX_PATH];
2323 DWORD max = ARRAY_SIZE(buf);
2324 HANDLE handle;
2325 DWORD ret = GetEnvironmentVariableW(key, buf, max);
2326 if (!ret || ret >= max)
2328 return;
2329 /* make sure this does not leak into child processes */
2331 SetEnvironmentVariableW(key, NULL);
2332 if (!wcscmp(buf, L"off")) {
2333 close(fd);
2334 handle = GetStdHandle(std_id);
2335 if (handle != INVALID_HANDLE_VALUE)
2336 CloseHandle(handle);
2337 return;
2338 }
2339 if (std_id == STD_ERROR_HANDLE && !wcscmp(buf, L"2>&1")) {
2340 handle = GetStdHandle(STD_OUTPUT_HANDLE);
2341 if (handle == INVALID_HANDLE_VALUE) {
2342 close(fd);
2343 handle = GetStdHandle(std_id);
2344 if (handle != INVALID_HANDLE_VALUE)
2345 CloseHandle(handle);
2346 } else {
2347 int new_fd = _open_osfhandle((intptr_t)handle, O_BINARY);
2348 SetStdHandle(std_id, handle);
2349 dup2(new_fd, fd);
2350 /* do *not* close the new_fd: that would close stdout */
2351 }
2352 return;
2353 }
2354 handle = CreateFileW(buf, desired_access, 0, NULL, create_flag,
2355 flags, NULL);
2356 if (handle != INVALID_HANDLE_VALUE) {
2357 int new_fd = _open_osfhandle((intptr_t)handle, O_BINARY);
2358 SetStdHandle(std_id, handle);
2359 dup2(new_fd, fd);
2360 close(new_fd);
2361 }
2362}
2363static void maybe_redirect_std_handles(void)
2365{
2366 maybe_redirect_std_handle(L"GIT_REDIRECT_STDIN", STD_INPUT_HANDLE, 0,
2367 GENERIC_READ, FILE_ATTRIBUTE_NORMAL);
2368 maybe_redirect_std_handle(L"GIT_REDIRECT_STDOUT", STD_OUTPUT_HANDLE, 1,
2369 GENERIC_WRITE, FILE_ATTRIBUTE_NORMAL);
2370 maybe_redirect_std_handle(L"GIT_REDIRECT_STDERR", STD_ERROR_HANDLE, 2,
2371 GENERIC_WRITE, FILE_FLAG_NO_BUFFERING);
2372}
2373void mingw_startup(void)
2375{
2376 int i, maxlen, argc;
2377 char *buffer;
2378 wchar_t **wenv, **wargv;
2379 _startupinfo si;
2380 maybe_redirect_std_handles();
2382 /* get wide char arguments and environment */
2384 si.newmode = 0;
2385 if (__wgetmainargs(&argc, &wargv, &wenv, _CRT_glob, &si) < 0)
2386 die_startup();
2387 /* determine size of argv and environ conversion buffer */
2389 maxlen = wcslen(wargv[0]);
2390 for (i = 1; i < argc; i++)
2391 maxlen = max(maxlen, wcslen(wargv[i]));
2392 for (i = 0; wenv[i]; i++)
2393 maxlen = max(maxlen, wcslen(wenv[i]));
2394 /*
2396 * nedmalloc can't free CRT memory, allocate resizable environment
2397 * list. Note that xmalloc / xmemdupz etc. call getenv, so we cannot
2398 * use it while initializing the environment itself.
2399 */
2400 environ_size = i + 1;
2401 environ_alloc = alloc_nr(environ_size * sizeof(char*));
2402 environ = malloc_startup(environ_alloc);
2403 /* allocate buffer (wchar_t encodes to max 3 UTF-8 bytes) */
2405 maxlen = 3 * maxlen + 1;
2406 buffer = malloc_startup(maxlen);
2407 /* convert command line arguments and environment to UTF-8 */
2409 for (i = 0; i < argc; i++)
2410 __argv[i] = wcstoutfdup_startup(buffer, wargv[i], maxlen);
2411 for (i = 0; wenv[i]; i++)
2412 environ[i] = wcstoutfdup_startup(buffer, wenv[i], maxlen);
2413 environ[i] = NULL;
2414 free(buffer);
2415 /* sort environment for O(log n) getenv / putenv */
2417 qsort(environ, i, sizeof(char*), compareenv);
2418 /* fix Windows specific environment settings */
2420 setup_windows_environment();
2421 /* initialize critical section for waitpid pinfo_t list */
2423 InitializeCriticalSection(&pinfo_cs);
2424 /* set up default file mode and file modes for stdin/out/err */
2426 _fmode = _O_BINARY;
2427 _setmode(_fileno(stdin), _O_BINARY);
2428 _setmode(_fileno(stdout), _O_BINARY);
2429 _setmode(_fileno(stderr), _O_BINARY);
2430 /* initialize Unicode console */
2432 winansi_init();
2433}
2434int uname(struct utsname *buf)
2436{
2437 unsigned v = (unsigned)GetVersion();
2438 memset(buf, 0, sizeof(*buf));
2439 xsnprintf(buf->sysname, sizeof(buf->sysname), "Windows");
2440 xsnprintf(buf->release, sizeof(buf->release),
2441 "%u.%u", v & 0xff, (v >> 8) & 0xff);
2442 /* assuming NT variants only.. */
2443 xsnprintf(buf->version, sizeof(buf->version),
2444 "%u", (v >> 16) & 0x7fff);
2445 return 0;
2446}