1#include "../git-compat-util.h"
2#include "win32.h"
3#include <conio.h>
4#include <wchar.h>
5#include "../strbuf.h"
6#include "../run-command.h"
7#include "../cache.h"
8#include "win32/lazyload.h"
9#include "../config.h"
10#define HCAST(type, handle) ((type)(intptr_t)handle)
12static const int delay[] = { 0, 1, 10, 20, 40 };
14int err_win_to_posix(DWORD winerr)
16{
17 int error = ENOSYS;
18 switch(winerr) {
19 case ERROR_ACCESS_DENIED: error = EACCES; break;
20 case ERROR_ACCOUNT_DISABLED: error = EACCES; break;
21 case ERROR_ACCOUNT_RESTRICTION: error = EACCES; break;
22 case ERROR_ALREADY_ASSIGNED: error = EBUSY; break;
23 case ERROR_ALREADY_EXISTS: error = EEXIST; break;
24 case ERROR_ARITHMETIC_OVERFLOW: error = ERANGE; break;
25 case ERROR_BAD_COMMAND: error = EIO; break;
26 case ERROR_BAD_DEVICE: error = ENODEV; break;
27 case ERROR_BAD_DRIVER_LEVEL: error = ENXIO; break;
28 case ERROR_BAD_EXE_FORMAT: error = ENOEXEC; break;
29 case ERROR_BAD_FORMAT: error = ENOEXEC; break;
30 case ERROR_BAD_LENGTH: error = EINVAL; break;
31 case ERROR_BAD_PATHNAME: error = ENOENT; break;
32 case ERROR_BAD_PIPE: error = EPIPE; break;
33 case ERROR_BAD_UNIT: error = ENODEV; break;
34 case ERROR_BAD_USERNAME: error = EINVAL; break;
35 case ERROR_BROKEN_PIPE: error = EPIPE; break;
36 case ERROR_BUFFER_OVERFLOW: error = ENAMETOOLONG; break;
37 case ERROR_BUSY: error = EBUSY; break;
38 case ERROR_BUSY_DRIVE: error = EBUSY; break;
39 case ERROR_CALL_NOT_IMPLEMENTED: error = ENOSYS; break;
40 case ERROR_CANNOT_MAKE: error = EACCES; break;
41 case ERROR_CANTOPEN: error = EIO; break;
42 case ERROR_CANTREAD: error = EIO; break;
43 case ERROR_CANTWRITE: error = EIO; break;
44 case ERROR_CRC: error = EIO; break;
45 case ERROR_CURRENT_DIRECTORY: error = EACCES; break;
46 case ERROR_DEVICE_IN_USE: error = EBUSY; break;
47 case ERROR_DEV_NOT_EXIST: error = ENODEV; break;
48 case ERROR_DIRECTORY: error = EINVAL; break;
49 case ERROR_DIR_NOT_EMPTY: error = ENOTEMPTY; break;
50 case ERROR_DISK_CHANGE: error = EIO; break;
51 case ERROR_DISK_FULL: error = ENOSPC; break;
52 case ERROR_DRIVE_LOCKED: error = EBUSY; break;
53 case ERROR_ENVVAR_NOT_FOUND: error = EINVAL; break;
54 case ERROR_EXE_MARKED_INVALID: error = ENOEXEC; break;
55 case ERROR_FILENAME_EXCED_RANGE: error = ENAMETOOLONG; break;
56 case ERROR_FILE_EXISTS: error = EEXIST; break;
57 case ERROR_FILE_INVALID: error = ENODEV; break;
58 case ERROR_FILE_NOT_FOUND: error = ENOENT; break;
59 case ERROR_GEN_FAILURE: error = EIO; break;
60 case ERROR_HANDLE_DISK_FULL: error = ENOSPC; break;
61 case ERROR_INSUFFICIENT_BUFFER: error = ENOMEM; break;
62 case ERROR_INVALID_ACCESS: error = EACCES; break;
63 case ERROR_INVALID_ADDRESS: error = EFAULT; break;
64 case ERROR_INVALID_BLOCK: error = EFAULT; break;
65 case ERROR_INVALID_DATA: error = EINVAL; break;
66 case ERROR_INVALID_DRIVE: error = ENODEV; break;
67 case ERROR_INVALID_EXE_SIGNATURE: error = ENOEXEC; break;
68 case ERROR_INVALID_FLAGS: error = EINVAL; break;
69 case ERROR_INVALID_FUNCTION: error = ENOSYS; break;
70 case ERROR_INVALID_HANDLE: error = EBADF; break;
71 case ERROR_INVALID_LOGON_HOURS: error = EACCES; break;
72 case ERROR_INVALID_NAME: error = EINVAL; break;
73 case ERROR_INVALID_OWNER: error = EINVAL; break;
74 case ERROR_INVALID_PARAMETER: error = EINVAL; break;
75 case ERROR_INVALID_PASSWORD: error = EPERM; break;
76 case ERROR_INVALID_PRIMARY_GROUP: error = EINVAL; break;
77 case ERROR_INVALID_SIGNAL_NUMBER: error = EINVAL; break;
78 case ERROR_INVALID_TARGET_HANDLE: error = EIO; break;
79 case ERROR_INVALID_WORKSTATION: error = EACCES; break;
80 case ERROR_IO_DEVICE: error = EIO; break;
81 case ERROR_IO_INCOMPLETE: error = EINTR; break;
82 case ERROR_LOCKED: error = EBUSY; break;
83 case ERROR_LOCK_VIOLATION: error = EACCES; break;
84 case ERROR_LOGON_FAILURE: error = EACCES; break;
85 case ERROR_MAPPED_ALIGNMENT: error = EINVAL; break;
86 case ERROR_META_EXPANSION_TOO_LONG: error = E2BIG; break;
87 case ERROR_MORE_DATA: error = EPIPE; break;
88 case ERROR_NEGATIVE_SEEK: error = ESPIPE; break;
89 case ERROR_NOACCESS: error = EFAULT; break;
90 case ERROR_NONE_MAPPED: error = EINVAL; break;
91 case ERROR_NOT_ENOUGH_MEMORY: error = ENOMEM; break;
92 case ERROR_NOT_READY: error = EAGAIN; break;
93 case ERROR_NOT_SAME_DEVICE: error = EXDEV; break;
94 case ERROR_NO_DATA: error = EPIPE; break;
95 case ERROR_NO_MORE_SEARCH_HANDLES: error = EIO; break;
96 case ERROR_NO_PROC_SLOTS: error = EAGAIN; break;
97 case ERROR_NO_SUCH_PRIVILEGE: error = EACCES; break;
98 case ERROR_OPEN_FAILED: error = EIO; break;
99 case ERROR_OPEN_FILES: error = EBUSY; break;
100 case ERROR_OPERATION_ABORTED: error = EINTR; break;
101 case ERROR_OUTOFMEMORY: error = ENOMEM; break;
102 case ERROR_PASSWORD_EXPIRED: error = EACCES; break;
103 case ERROR_PATH_BUSY: error = EBUSY; break;
104 case ERROR_PATH_NOT_FOUND: error = ENOENT; break;
105 case ERROR_PIPE_BUSY: error = EBUSY; break;
106 case ERROR_PIPE_CONNECTED: error = EPIPE; break;
107 case ERROR_PIPE_LISTENING: error = EPIPE; break;
108 case ERROR_PIPE_NOT_CONNECTED: error = EPIPE; break;
109 case ERROR_PRIVILEGE_NOT_HELD: error = EACCES; break;
110 case ERROR_READ_FAULT: error = EIO; break;
111 case ERROR_SEEK: error = EIO; break;
112 case ERROR_SEEK_ON_DEVICE: error = ESPIPE; break;
113 case ERROR_SHARING_BUFFER_EXCEEDED: error = ENFILE; break;
114 case ERROR_SHARING_VIOLATION: error = EACCES; break;
115 case ERROR_STACK_OVERFLOW: error = ENOMEM; break;
116 case ERROR_SWAPERROR: error = ENOENT; break;
117 case ERROR_TOO_MANY_MODULES: error = EMFILE; break;
118 case ERROR_TOO_MANY_OPEN_FILES: error = EMFILE; break;
119 case ERROR_UNRECOGNIZED_MEDIA: error = ENXIO; break;
120 case ERROR_UNRECOGNIZED_VOLUME: error = ENODEV; break;
121 case ERROR_WAIT_NO_CHILDREN: error = ECHILD; break;
122 case ERROR_WRITE_FAULT: error = EIO; break;
123 case ERROR_WRITE_PROTECT: error = EROFS; break;
124 }
125 return error;
126}
127static inline int is_file_in_use_error(DWORD errcode)
129{
130 switch (errcode) {
131 case ERROR_SHARING_VIOLATION:
132 case ERROR_ACCESS_DENIED:
133 return 1;
134 }
135 return 0;
137}
138static int read_yes_no_answer(void)
140{
141 char answer[1024];
142 if (fgets(answer, sizeof(answer), stdin)) {
144 size_t answer_len = strlen(answer);
145 int got_full_line = 0, c;
146 /* remove the newline */
148 if (answer_len >= 2 && answer[answer_len-2] == '\r') {
149 answer[answer_len-2] = '\0';
150 got_full_line = 1;
151 } else if (answer_len >= 1 && answer[answer_len-1] == '\n') {
152 answer[answer_len-1] = '\0';
153 got_full_line = 1;
154 }
155 /* flush the buffer in case we did not get the full line */
156 if (!got_full_line)
157 while ((c = getchar()) != EOF && c != '\n')
158 ;
159 } else
160 /* we could not read, return the
161 * default answer which is no */
162 return 0;
163 if (tolower(answer[0]) == 'y' && !answer[1])
165 return 1;
166 if (!strncasecmp(answer, "yes", sizeof(answer)))
167 return 1;
168 if (tolower(answer[0]) == 'n' && !answer[1])
169 return 0;
170 if (!strncasecmp(answer, "no", sizeof(answer)))
171 return 0;
172 /* did not find an answer we understand */
174 return -1;
175}
176static int ask_yes_no_if_possible(const char *format, ...)
178{
179 char question[4096];
180 const char *retry_hook[] = { NULL, NULL, NULL };
181 va_list args;
182 va_start(args, format);
184 vsnprintf(question, sizeof(question), format, args);
185 va_end(args);
186 if ((retry_hook[0] = mingw_getenv("GIT_ASK_YESNO"))) {
188 retry_hook[1] = question;
189 return !run_command_v_opt(retry_hook, 0);
190 }
191 if (!isatty(_fileno(stdin)) || !isatty(_fileno(stderr)))
193 return 0;
194 while (1) {
196 int answer;
197 fprintf(stderr, "%s (y/n) ", question);
198 if ((answer = read_yes_no_answer()) >= 0)
200 return answer;
201 fprintf(stderr, "Sorry, I did not understand your answer. "
203 "Please type 'y' or 'n'\n");
204 }
205}
206/* Windows only */
208enum hide_dotfiles_type {
209 HIDE_DOTFILES_FALSE = 0,
210 HIDE_DOTFILES_TRUE,
211 HIDE_DOTFILES_DOTGITONLY
212};
213static enum hide_dotfiles_type hide_dotfiles = HIDE_DOTFILES_DOTGITONLY;
215int mingw_core_config(const char *var, const char *value, void *cb)
217{
218 if (!strcmp(var, "core.hidedotfiles")) {
219 if (value && !strcasecmp(value, "dotgitonly"))
220 hide_dotfiles = HIDE_DOTFILES_DOTGITONLY;
221 else
222 hide_dotfiles = git_config_bool(var, value);
223 return 0;
224 }
225 return 0;
227}
228/* Normalizes NT paths as returned by some low-level APIs. */
230static wchar_t *normalize_ntpath(wchar_t *wbuf)
231{
232 int i;
233 /* fix absolute path prefixes */
234 if (wbuf[0] == '\\') {
235 /* strip NT namespace prefixes */
236 if (!wcsncmp(wbuf, L"\\??\\", 4) ||
237 !wcsncmp(wbuf, L"\\\\?\\", 4))
238 wbuf += 4;
239 else if (!wcsnicmp(wbuf, L"\\DosDevices\\", 12))
240 wbuf += 12;
241 /* replace remaining '...UNC\' with '\\' */
242 if (!wcsnicmp(wbuf, L"UNC\\", 4)) {
243 wbuf += 2;
244 *wbuf = '\\';
245 }
246 }
247 /* convert backslashes to slashes */
248 for (i = 0; wbuf[i]; i++)
249 if (wbuf[i] == '\\')
250 wbuf[i] = '/';
251 return wbuf;
252}
253int mingw_unlink(const char *pathname)
255{
256 int ret, tries = 0;
257 wchar_t wpathname[MAX_PATH];
258 if (xutftowcs_path(wpathname, pathname) < 0)
259 return -1;
260 /* read-only files cannot be removed */
262 _wchmod(wpathname, 0666);
263 while ((ret = _wunlink(wpathname)) == -1 && tries < ARRAY_SIZE(delay)) {
264 if (!is_file_in_use_error(GetLastError()))
265 break;
266 /*
267 * We assume that some other process had the source or
268 * destination file open at the wrong moment and retry.
269 * In order to give the other process a higher chance to
270 * complete its operation, we give up our time slice now.
271 * If we have to retry again, we do sleep a bit.
272 */
273 Sleep(delay[tries]);
274 tries++;
275 }
276 while (ret == -1 && is_file_in_use_error(GetLastError()) &&
277 ask_yes_no_if_possible("Unlink of file '%s' failed. "
278 "Should I try again?", pathname))
279 ret = _wunlink(wpathname);
280 return ret;
281}
282static int is_dir_empty(const wchar_t *wpath)
284{
285 WIN32_FIND_DATAW findbuf;
286 HANDLE handle;
287 wchar_t wbuf[MAX_PATH + 2];
288 wcscpy(wbuf, wpath);
289 wcscat(wbuf, L"\\*");
290 handle = FindFirstFileW(wbuf, &findbuf);
291 if (handle == INVALID_HANDLE_VALUE)
292 return GetLastError() == ERROR_NO_MORE_FILES;
293 while (!wcscmp(findbuf.cFileName, L".") ||
295 !wcscmp(findbuf.cFileName, L".."))
296 if (!FindNextFileW(handle, &findbuf)) {
297 DWORD err = GetLastError();
298 FindClose(handle);
299 return err == ERROR_NO_MORE_FILES;
300 }
301 FindClose(handle);
302 return 0;
303}
304int mingw_rmdir(const char *pathname)
306{
307 int ret, tries = 0;
308 wchar_t wpathname[MAX_PATH];
309 if (xutftowcs_path(wpathname, pathname) < 0)
310 return -1;
311 while ((ret = _wrmdir(wpathname)) == -1 && tries < ARRAY_SIZE(delay)) {
313 if (!is_file_in_use_error(GetLastError()))
314 errno = err_win_to_posix(GetLastError());
315 if (errno != EACCES)
316 break;
317 if (!is_dir_empty(wpathname)) {
318 errno = ENOTEMPTY;
319 break;
320 }
321 /*
322 * We assume that some other process had the source or
323 * destination file open at the wrong moment and retry.
324 * In order to give the other process a higher chance to
325 * complete its operation, we give up our time slice now.
326 * If we have to retry again, we do sleep a bit.
327 */
328 Sleep(delay[tries]);
329 tries++;
330 }
331 while (ret == -1 && errno == EACCES && is_file_in_use_error(GetLastError()) &&
332 ask_yes_no_if_possible("Deletion of directory '%s' failed. "
333 "Should I try again?", pathname))
334 ret = _wrmdir(wpathname);
335 return ret;
336}
337static inline int needs_hiding(const char *path)
339{
340 const char *basename;
341 if (hide_dotfiles == HIDE_DOTFILES_FALSE)
343 return 0;
344 /* We cannot use basename(), as it would remove trailing slashes */
346 mingw_skip_dos_drive_prefix((char **)&path);
347 if (!*path)
348 return 0;
349 for (basename = path; *path; path++)
351 if (is_dir_sep(*path)) {
352 do {
353 path++;
354 } while (is_dir_sep(*path));
355 /* ignore trailing slashes */
356 if (*path)
357 basename = path;
358 }
359 if (hide_dotfiles == HIDE_DOTFILES_TRUE)
361 return *basename == '.';
362 assert(hide_dotfiles == HIDE_DOTFILES_DOTGITONLY);
364 return !strncasecmp(".git", basename, 4) &&
365 (!basename[4] || is_dir_sep(basename[4]));
366}
367static int set_hidden_flag(const wchar_t *path, int set)
369{
370 DWORD original = GetFileAttributesW(path), modified;
371 if (set)
372 modified = original | FILE_ATTRIBUTE_HIDDEN;
373 else
374 modified = original & ~FILE_ATTRIBUTE_HIDDEN;
375 if (original == modified || SetFileAttributesW(path, modified))
376 return 0;
377 errno = err_win_to_posix(GetLastError());
378 return -1;
379}
380int mingw_mkdir(const char *path, int mode)
382{
383 int ret;
384 wchar_t wpath[MAX_PATH];
385 if (xutftowcs_path(wpath, path) < 0)
386 return -1;
387 ret = _wmkdir(wpath);
388 if (!ret && needs_hiding(path))
389 return set_hidden_flag(wpath, 1);
390 return ret;
391}
392/*
394 * Calling CreateFile() using FILE_APPEND_DATA and without FILE_WRITE_DATA
395 * is documented in [1] as opening a writable file handle in append mode.
396 * (It is believed that) this is atomic since it is maintained by the
397 * kernel unlike the O_APPEND flag which is racily maintained by the CRT.
398 *
399 * [1] https://docs.microsoft.com/en-us/windows/desktop/fileio/file-access-rights-constants
400 *
401 * This trick does not appear to work for named pipes. Instead it creates
402 * a named pipe client handle that cannot be written to. Callers should
403 * just use the regular _wopen() for them. (And since client handle gets
404 * bound to a unique server handle, it isn't really an issue.)
405 */
406static int mingw_open_append(wchar_t const *wfilename, int oflags, ...)
407{
408 HANDLE handle;
409 int fd;
410 DWORD create = (oflags & O_CREAT) ? OPEN_ALWAYS : OPEN_EXISTING;
411 /* only these flags are supported */
413 if ((oflags & ~O_CREAT) != (O_WRONLY | O_APPEND))
414 return errno = ENOSYS, -1;
415 /*
417 * FILE_SHARE_WRITE is required to permit child processes
418 * to append to the file.
419 */
420 handle = CreateFileW(wfilename, FILE_APPEND_DATA,
421 FILE_SHARE_WRITE | FILE_SHARE_READ,
422 NULL, create, FILE_ATTRIBUTE_NORMAL, NULL);
423 if (handle == INVALID_HANDLE_VALUE)
424 return errno = err_win_to_posix(GetLastError()), -1;
425 /*
427 * No O_APPEND here, because the CRT uses it only to reset the
428 * file pointer to EOF before each write(); but that is not
429 * necessary (and may lead to races) for a file created with
430 * FILE_APPEND_DATA.
431 */
432 fd = _open_osfhandle((intptr_t)handle, O_BINARY);
433 if (fd < 0)
434 CloseHandle(handle);
435 return fd;
436}
437/*
439 * Does the pathname map to the local named pipe filesystem?
440 * That is, does it have a "//./pipe/" prefix?
441 */
442static int is_local_named_pipe_path(const char *filename)
443{
444 return (is_dir_sep(filename[0]) &&
445 is_dir_sep(filename[1]) &&
446 filename[2] == '.' &&
447 is_dir_sep(filename[3]) &&
448 !strncasecmp(filename+4, "pipe", 4) &&
449 is_dir_sep(filename[8]) &&
450 filename[9]);
451}
452int mingw_open (const char *filename, int oflags, ...)
454{
455 typedef int (*open_fn_t)(wchar_t const *wfilename, int oflags, ...);
456 va_list args;
457 unsigned mode;
458 int fd;
459 wchar_t wfilename[MAX_PATH];
460 open_fn_t open_fn;
461 va_start(args, oflags);
463 mode = va_arg(args, int);
464 va_end(args);
465 if (filename && !strcmp(filename, "/dev/null"))
467 filename = "nul";
468 if ((oflags & O_APPEND) && !is_local_named_pipe_path(filename))
470 open_fn = mingw_open_append;
471 else
472 open_fn = _wopen;
473 if (xutftowcs_path(wfilename, filename) < 0)
475 return -1;
476 fd = open_fn(wfilename, oflags, mode);
477 if (fd < 0 && (oflags & O_ACCMODE) != O_RDONLY && errno == EACCES) {
479 DWORD attrs = GetFileAttributesW(wfilename);
480 if (attrs != INVALID_FILE_ATTRIBUTES && (attrs & FILE_ATTRIBUTE_DIRECTORY))
481 errno = EISDIR;
482 }
483 if ((oflags & O_CREAT) && needs_hiding(filename)) {
484 /*
485 * Internally, _wopen() uses the CreateFile() API which errors
486 * out with an ERROR_ACCESS_DENIED if CREATE_ALWAYS was
487 * specified and an already existing file's attributes do not
488 * match *exactly*. As there is no mode or flag we can set that
489 * would correspond to FILE_ATTRIBUTE_HIDDEN, let's just try
490 * again *without* the O_CREAT flag (that corresponds to the
491 * CREATE_ALWAYS flag of CreateFile()).
492 */
493 if (fd < 0 && errno == EACCES)
494 fd = open_fn(wfilename, oflags & ~O_CREAT, mode);
495 if (fd >= 0 && set_hidden_flag(wfilename, 1))
496 warning("could not mark '%s' as hidden.", filename);
497 }
498 return fd;
499}
500static BOOL WINAPI ctrl_ignore(DWORD type)
502{
503 return TRUE;
504}
505#undef fgetc
507int mingw_fgetc(FILE *stream)
508{
509 int ch;
510 if (!isatty(_fileno(stream)))
511 return fgetc(stream);
512 SetConsoleCtrlHandler(ctrl_ignore, TRUE);
514 while (1) {
515 ch = fgetc(stream);
516 if (ch != EOF || GetLastError() != ERROR_OPERATION_ABORTED)
517 break;
518 /* Ctrl+C was pressed, simulate SIGINT and retry */
520 mingw_raise(SIGINT);
521 }
522 SetConsoleCtrlHandler(ctrl_ignore, FALSE);
523 return ch;
524}
525#undef fopen
527FILE *mingw_fopen (const char *filename, const char *otype)
528{
529 int hide = needs_hiding(filename);
530 FILE *file;
531 wchar_t wfilename[MAX_PATH], wotype[4];
532 if (filename && !strcmp(filename, "/dev/null"))
533 filename = "nul";
534 if (xutftowcs_path(wfilename, filename) < 0 ||
535 xutftowcs(wotype, otype, ARRAY_SIZE(wotype)) < 0)
536 return NULL;
537 if (hide && !access(filename, F_OK) && set_hidden_flag(wfilename, 0)) {
538 error("could not unhide %s", filename);
539 return NULL;
540 }
541 file = _wfopen(wfilename, wotype);
542 if (!file && GetLastError() == ERROR_INVALID_NAME)
543 errno = ENOENT;
544 if (file && hide && set_hidden_flag(wfilename, 1))
545 warning("could not mark '%s' as hidden.", filename);
546 return file;
547}
548FILE *mingw_freopen (const char *filename, const char *otype, FILE *stream)
550{
551 int hide = needs_hiding(filename);
552 FILE *file;
553 wchar_t wfilename[MAX_PATH], wotype[4];
554 if (filename && !strcmp(filename, "/dev/null"))
555 filename = "nul";
556 if (xutftowcs_path(wfilename, filename) < 0 ||
557 xutftowcs(wotype, otype, ARRAY_SIZE(wotype)) < 0)
558 return NULL;
559 if (hide && !access(filename, F_OK) && set_hidden_flag(wfilename, 0)) {
560 error("could not unhide %s", filename);
561 return NULL;
562 }
563 file = _wfreopen(wfilename, wotype, stream);
564 if (file && hide && set_hidden_flag(wfilename, 1))
565 warning("could not mark '%s' as hidden.", filename);
566 return file;
567}
568#undef fflush
570int mingw_fflush(FILE *stream)
571{
572 int ret = fflush(stream);
573 /*
575 * write() is used behind the scenes of stdio output functions.
576 * Since git code does not check for errors after each stdio write
577 * operation, it can happen that write() is called by a later
578 * stdio function even if an earlier write() call failed. In the
579 * case of a pipe whose readable end was closed, only the first
580 * call to write() reports EPIPE on Windows. Subsequent write()
581 * calls report EINVAL. It is impossible to notice whether this
582 * fflush invocation triggered such a case, therefore, we have to
583 * catch all EINVAL errors whole-sale.
584 */
585 if (ret && errno == EINVAL)
586 errno = EPIPE;
587 return ret;
589}
590#undef write
592ssize_t mingw_write(int fd, const void *buf, size_t len)
593{
594 ssize_t result = write(fd, buf, len);
595 if (result < 0 && errno == EINVAL && buf) {
597 /* check if fd is a pipe */
598 HANDLE h = (HANDLE) _get_osfhandle(fd);
599 if (GetFileType(h) == FILE_TYPE_PIPE)
600 errno = EPIPE;
601 else
602 errno = EINVAL;
603 }
604 return result;
606}
607int mingw_access(const char *filename, int mode)
609{
610 wchar_t wfilename[MAX_PATH];
611 if (xutftowcs_path(wfilename, filename) < 0)
612 return -1;
613 /* X_OK is not supported by the MSVCRT version */
614 return _waccess(wfilename, mode & ~X_OK);
615}
616int mingw_chdir(const char *dirname)
618{
619 wchar_t wdirname[MAX_PATH];
620 if (xutftowcs_path(wdirname, dirname) < 0)
621 return -1;
622 return _wchdir(wdirname);
623}
624int mingw_chmod(const char *filename, int mode)
626{
627 wchar_t wfilename[MAX_PATH];
628 if (xutftowcs_path(wfilename, filename) < 0)
629 return -1;
630 return _wchmod(wfilename, mode);
631}
632/*
634 * The unit of FILETIME is 100-nanoseconds since January 1, 1601, UTC.
635 * Returns the 100-nanoseconds ("hekto nanoseconds") since the epoch.
636 */
637static inline long long filetime_to_hnsec(const FILETIME *ft)
638{
639 long long winTime = ((long long)ft->dwHighDateTime << 32) + ft->dwLowDateTime;
640 /* Windows to Unix Epoch conversion */
641 return winTime - 116444736000000000LL;
642}
643static inline time_t filetime_to_time_t(const FILETIME *ft)
645{
646 return (time_t)(filetime_to_hnsec(ft) / 10000000);
647}
648/**
650 * Verifies that safe_create_leading_directories() would succeed.
651 */
652static int has_valid_directory_prefix(wchar_t *wfilename)
653{
654 int n = wcslen(wfilename);
655 while (n > 0) {
657 wchar_t c = wfilename[--n];
658 DWORD attributes;
659 if (!is_dir_sep(c))
661 continue;
662 wfilename[n] = L'\0';
664 attributes = GetFileAttributesW(wfilename);
665 wfilename[n] = c;
666 if (attributes == FILE_ATTRIBUTE_DIRECTORY ||
667 attributes == FILE_ATTRIBUTE_DEVICE)
668 return 1;
669 if (attributes == INVALID_FILE_ATTRIBUTES)
670 switch (GetLastError()) {
671 case ERROR_PATH_NOT_FOUND:
672 continue;
673 case ERROR_FILE_NOT_FOUND:
674 /* This implies parent directory exists. */
675 return 1;
676 }
677 return 0;
678 }
679 return 1;
680}
681/* We keep the do_lstat code in a separate function to avoid recursion.
683 * When a path ends with a slash, the stat will fail with ENOENT. In
684 * this case, we strip the trailing slashes and stat again.
685 *
686 * If follow is true then act like stat() and report on the link
687 * target. Otherwise report on the link itself.
688 */
689static int do_lstat(int follow, const char *file_name, struct stat *buf)
690{
691 WIN32_FILE_ATTRIBUTE_DATA fdata;
692 wchar_t wfilename[MAX_PATH];
693 if (xutftowcs_path(wfilename, file_name) < 0)
694 return -1;
695 if (GetFileAttributesExW(wfilename, GetFileExInfoStandard, &fdata)) {
697 buf->st_ino = 0;
698 buf->st_gid = 0;
699 buf->st_uid = 0;
700 buf->st_nlink = 1;
701 buf->st_mode = file_attr_to_st_mode(fdata.dwFileAttributes);
702 buf->st_size = fdata.nFileSizeLow |
703 (((off_t)fdata.nFileSizeHigh)<<32);
704 buf->st_dev = buf->st_rdev = 0; /* not used by Git */
705 buf->st_atime = filetime_to_time_t(&(fdata.ftLastAccessTime));
706 buf->st_mtime = filetime_to_time_t(&(fdata.ftLastWriteTime));
707 buf->st_ctime = filetime_to_time_t(&(fdata.ftCreationTime));
708 if (fdata.dwFileAttributes & FILE_ATTRIBUTE_REPARSE_POINT) {
709 WIN32_FIND_DATAW findbuf;
710 HANDLE handle = FindFirstFileW(wfilename, &findbuf);
711 if (handle != INVALID_HANDLE_VALUE) {
712 if ((findbuf.dwFileAttributes & FILE_ATTRIBUTE_REPARSE_POINT) &&
713 (findbuf.dwReserved0 == IO_REPARSE_TAG_SYMLINK)) {
714 if (follow) {
715 char buffer[MAXIMUM_REPARSE_DATA_BUFFER_SIZE];
716 buf->st_size = readlink(file_name, buffer, MAXIMUM_REPARSE_DATA_BUFFER_SIZE);
717 } else {
718 buf->st_mode = S_IFLNK;
719 }
720 buf->st_mode |= S_IREAD;
721 if (!(findbuf.dwFileAttributes & FILE_ATTRIBUTE_READONLY))
722 buf->st_mode |= S_IWRITE;
723 }
724 FindClose(handle);
725 }
726 }
727 return 0;
728 }
729 switch (GetLastError()) {
730 case ERROR_ACCESS_DENIED:
731 case ERROR_SHARING_VIOLATION:
732 case ERROR_LOCK_VIOLATION:
733 case ERROR_SHARING_BUFFER_EXCEEDED:
734 errno = EACCES;
735 break;
736 case ERROR_BUFFER_OVERFLOW:
737 errno = ENAMETOOLONG;
738 break;
739 case ERROR_NOT_ENOUGH_MEMORY:
740 errno = ENOMEM;
741 break;
742 case ERROR_PATH_NOT_FOUND:
743 if (!has_valid_directory_prefix(wfilename)) {
744 errno = ENOTDIR;
745 break;
746 }
747 /* fallthru */
748 default:
749 errno = ENOENT;
750 break;
751 }
752 return -1;
753}
754/* We provide our own lstat/fstat functions, since the provided
756 * lstat/fstat functions are so slow. These stat functions are
757 * tailored for Git's usage (read: fast), and are not meant to be
758 * complete. Note that Git stat()s are redirected to mingw_lstat()
759 * too, since Windows doesn't really handle symlinks that well.
760 */
761static int do_stat_internal(int follow, const char *file_name, struct stat *buf)
762{
763 int namelen;
764 char alt_name[PATH_MAX];
765 if (!do_lstat(follow, file_name, buf))
767 return 0;
768 /* if file_name ended in a '/', Windows returned ENOENT;
770 * try again without trailing slashes
771 */
772 if (errno != ENOENT)
773 return -1;
774 namelen = strlen(file_name);
776 if (namelen && file_name[namelen-1] != '/')
777 return -1;
778 while (namelen && file_name[namelen-1] == '/')
779 --namelen;
780 if (!namelen || namelen >= PATH_MAX)
781 return -1;
782 memcpy(alt_name, file_name, namelen);
784 alt_name[namelen] = 0;
785 return do_lstat(follow, alt_name, buf);
786}
787int mingw_lstat(const char *file_name, struct stat *buf)
789{
790 return do_stat_internal(0, file_name, buf);
791}
792int mingw_stat(const char *file_name, struct stat *buf)
793{
794 return do_stat_internal(1, file_name, buf);
795}
796int mingw_fstat(int fd, struct stat *buf)
798{
799 HANDLE fh = (HANDLE)_get_osfhandle(fd);
800 BY_HANDLE_FILE_INFORMATION fdata;
801 if (fh == INVALID_HANDLE_VALUE) {
803 errno = EBADF;
804 return -1;
805 }
806 /* direct non-file handles to MS's fstat() */
807 if (GetFileType(fh) != FILE_TYPE_DISK)
808 return _fstati64(fd, buf);
809 if (GetFileInformationByHandle(fh, &fdata)) {
811 buf->st_ino = 0;
812 buf->st_gid = 0;
813 buf->st_uid = 0;
814 buf->st_nlink = 1;
815 buf->st_mode = file_attr_to_st_mode(fdata.dwFileAttributes);
816 buf->st_size = fdata.nFileSizeLow |
817 (((off_t)fdata.nFileSizeHigh)<<32);
818 buf->st_dev = buf->st_rdev = 0; /* not used by Git */
819 buf->st_atime = filetime_to_time_t(&(fdata.ftLastAccessTime));
820 buf->st_mtime = filetime_to_time_t(&(fdata.ftLastWriteTime));
821 buf->st_ctime = filetime_to_time_t(&(fdata.ftCreationTime));
822 return 0;
823 }
824 errno = EBADF;
825 return -1;
826}
827static inline void time_t_to_filetime(time_t t, FILETIME *ft)
829{
830 long long winTime = t * 10000000LL + 116444736000000000LL;
831 ft->dwLowDateTime = winTime;
832 ft->dwHighDateTime = winTime >> 32;
833}
834int mingw_utime (const char *file_name, const struct utimbuf *times)
836{
837 FILETIME mft, aft;
838 int fh, rc;
839 DWORD attrs;
840 wchar_t wfilename[MAX_PATH];
841 if (xutftowcs_path(wfilename, file_name) < 0)
842 return -1;
843 /* must have write permission */
845 attrs = GetFileAttributesW(wfilename);
846 if (attrs != INVALID_FILE_ATTRIBUTES &&
847 (attrs & FILE_ATTRIBUTE_READONLY)) {
848 /* ignore errors here; open() will report them */
849 SetFileAttributesW(wfilename, attrs & ~FILE_ATTRIBUTE_READONLY);
850 }
851 if ((fh = _wopen(wfilename, O_RDWR | O_BINARY)) < 0) {
853 rc = -1;
854 goto revert_attrs;
855 }
856 if (times) {
858 time_t_to_filetime(times->modtime, &mft);
859 time_t_to_filetime(times->actime, &aft);
860 } else {
861 GetSystemTimeAsFileTime(&mft);
862 aft = mft;
863 }
864 if (!SetFileTime((HANDLE)_get_osfhandle(fh), NULL, &aft, &mft)) {
865 errno = EINVAL;
866 rc = -1;
867 } else
868 rc = 0;
869 close(fh);
870revert_attrs:
872 if (attrs != INVALID_FILE_ATTRIBUTES &&
873 (attrs & FILE_ATTRIBUTE_READONLY)) {
874 /* ignore errors again */
875 SetFileAttributesW(wfilename, attrs);
876 }
877 return rc;
878}
879#undef strftime
881size_t mingw_strftime(char *s, size_t max,
882 const char *format, const struct tm *tm)
883{
884 size_t ret = strftime(s, max, format, tm);
885 if (!ret && errno == EINVAL)
887 die("invalid strftime format: '%s'", format);
888 return ret;
889}
890unsigned int sleep (unsigned int seconds)
892{
893 Sleep(seconds*1000);
894 return 0;
895}
896char *mingw_mktemp(char *template)
898{
899 wchar_t wtemplate[MAX_PATH];
900 if (xutftowcs_path(wtemplate, template) < 0)
901 return NULL;
902 if (!_wmktemp(wtemplate))
903 return NULL;
904 if (xwcstoutf(template, wtemplate, strlen(template) + 1) < 0)
905 return NULL;
906 return template;
907}
908int mkstemp(char *template)
910{
911 char *filename = mktemp(template);
912 if (filename == NULL)
913 return -1;
914 return open(filename, O_RDWR | O_CREAT, 0600);
915}
916int gettimeofday(struct timeval *tv, void *tz)
918{
919 FILETIME ft;
920 long long hnsec;
921 GetSystemTimeAsFileTime(&ft);
923 hnsec = filetime_to_hnsec(&ft);
924 tv->tv_sec = hnsec / 10000000;
925 tv->tv_usec = (hnsec % 10000000) / 10;
926 return 0;
927}
928int pipe(int filedes[2])
930{
931 HANDLE h[2];
932 /* this creates non-inheritable handles */
934 if (!CreatePipe(&h[0], &h[1], NULL, 8192)) {
935 errno = err_win_to_posix(GetLastError());
936 return -1;
937 }
938 filedes[0] = _open_osfhandle(HCAST(int, h[0]), O_NOINHERIT);
939 if (filedes[0] < 0) {
940 CloseHandle(h[0]);
941 CloseHandle(h[1]);
942 return -1;
943 }
944 filedes[1] = _open_osfhandle(HCAST(int, h[1]), O_NOINHERIT);
945 if (filedes[1] < 0) {
946 close(filedes[0]);
947 CloseHandle(h[1]);
948 return -1;
949 }
950 return 0;
951}
952struct tm *gmtime_r(const time_t *timep, struct tm *result)
954{
955 /* gmtime() in MSVCRT.DLL is thread-safe, but not reentrant */
956 memcpy(result, gmtime(timep), sizeof(struct tm));
957 return result;
958}
959struct tm *localtime_r(const time_t *timep, struct tm *result)
961{
962 /* localtime() in MSVCRT.DLL is thread-safe, but not reentrant */
963 memcpy(result, localtime(timep), sizeof(struct tm));
964 return result;
965}
966char *mingw_getcwd(char *pointer, int len)
968{
969 wchar_t cwd[MAX_PATH], wpointer[MAX_PATH];
970 DWORD ret = GetCurrentDirectoryW(ARRAY_SIZE(cwd), cwd);
971 if (!ret || ret >= ARRAY_SIZE(cwd)) {
973 errno = ret ? ENAMETOOLONG : err_win_to_posix(GetLastError());
974 return NULL;
975 }
976 ret = GetLongPathNameW(cwd, wpointer, ARRAY_SIZE(wpointer));
977 if (!ret && GetLastError() == ERROR_ACCESS_DENIED) {
978 HANDLE hnd = CreateFileW(cwd, 0,
979 FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE, NULL,
980 OPEN_EXISTING, FILE_FLAG_BACKUP_SEMANTICS, NULL);
981 if (hnd == INVALID_HANDLE_VALUE)
982 return NULL;
983 ret = GetFinalPathNameByHandleW(hnd, wpointer, ARRAY_SIZE(wpointer), 0);
984 CloseHandle(hnd);
985 if (!ret || ret >= ARRAY_SIZE(wpointer))
986 return NULL;
987 if (xwcstoutf(pointer, normalize_ntpath(wpointer), len) < 0)
988 return NULL;
989 return pointer;
990 }
991 if (!ret || ret >= ARRAY_SIZE(wpointer))
992 return NULL;
993 if (xwcstoutf(pointer, wpointer, len) < 0)
994 return NULL;
995 convert_slashes(pointer);
996 return pointer;
997}
998/*
1000 * See http://msdn2.microsoft.com/en-us/library/17w5ykft(vs.71).aspx
1001 * (Parsing C++ Command-Line Arguments)
1002 */
1003static const char *quote_arg(const char *arg)
1004{
1005 /* count chars to quote */
1006 int len = 0, n = 0;
1007 int force_quotes = 0;
1008 char *q, *d;
1009 const char *p = arg;
1010 if (!*p) force_quotes = 1;
1011 while (*p) {
1012 if (isspace(*p) || *p == '*' || *p == '?' || *p == '{' || *p == '\'')
1013 force_quotes = 1;
1014 else if (*p == '"')
1015 n++;
1016 else if (*p == '\\') {
1017 int count = 0;
1018 while (*p == '\\') {
1019 count++;
1020 p++;
1021 len++;
1022 }
1023 if (*p == '"')
1024 n += count*2 + 1;
1025 continue;
1026 }
1027 len++;
1028 p++;
1029 }
1030 if (!force_quotes && n == 0)
1031 return arg;
1032 /* insert \ where necessary */
1034 d = q = xmalloc(st_add3(len, n, 3));
1035 *d++ = '"';
1036 while (*arg) {
1037 if (*arg == '"')
1038 *d++ = '\\';
1039 else if (*arg == '\\') {
1040 int count = 0;
1041 while (*arg == '\\') {
1042 count++;
1043 *d++ = *arg++;
1044 }
1045 if (*arg == '"') {
1046 while (count-- > 0)
1047 *d++ = '\\';
1048 *d++ = '\\';
1049 }
1050 }
1051 *d++ = *arg++;
1052 }
1053 *d++ = '"';
1054 *d++ = 0;
1055 return q;
1056}
1057static const char *parse_interpreter(const char *cmd)
1059{
1060 static char buf[100];
1061 char *p, *opt;
1062 int n, fd;
1063 /* don't even try a .exe */
1065 n = strlen(cmd);
1066 if (n >= 4 && !strcasecmp(cmd+n-4, ".exe"))
1067 return NULL;
1068 fd = open(cmd, O_RDONLY);
1070 if (fd < 0)
1071 return NULL;
1072 n = read(fd, buf, sizeof(buf)-1);
1073 close(fd);
1074 if (n < 4) /* at least '#!/x' and not error */
1075 return NULL;
1076 if (buf[0] != '#' || buf[1] != '!')
1078 return NULL;
1079 buf[n] = '\0';
1080 p = buf + strcspn(buf, "\r\n");
1081 if (!*p)
1082 return NULL;
1083 *p = '\0';
1085 if (!(p = strrchr(buf+2, '/')) && !(p = strrchr(buf+2, '\\')))
1086 return NULL;
1087 /* strip options */
1088 if ((opt = strchr(p+1, ' ')))
1089 *opt = '\0';
1090 return p+1;
1091}
1092/*
1094 * exe_only means that we only want to detect .exe files, but not scripts
1095 * (which do not have an extension)
1096 */
1097static char *lookup_prog(const char *dir, int dirlen, const char *cmd,
1098 int isexe, int exe_only)
1099{
1100 char path[MAX_PATH];
1101 snprintf(path, sizeof(path), "%.*s\\%s.exe", dirlen, dir, cmd);
1102 if (!isexe && access(path, F_OK) == 0)
1104 return xstrdup(path);
1105 path[strlen(path)-4] = '\0';
1106 if ((!exe_only || isexe) && access(path, F_OK) == 0)
1107 if (!(GetFileAttributes(path) & FILE_ATTRIBUTE_DIRECTORY))
1108 return xstrdup(path);
1109 return NULL;
1110}
1111/*
1113 * Determines the absolute path of cmd using the split path in path.
1114 * If cmd contains a slash or backslash, no lookup is performed.
1115 */
1116static char *path_lookup(const char *cmd, int exe_only)
1117{
1118 const char *path;
1119 char *prog = NULL;
1120 int len = strlen(cmd);
1121 int isexe = len >= 4 && !strcasecmp(cmd+len-4, ".exe");
1122 if (strchr(cmd, '/') || strchr(cmd, '\\'))
1124 return xstrdup(cmd);
1125 path = mingw_getenv("PATH");
1127 if (!path)
1128 return NULL;
1129 while (!prog) {
1131 const char *sep = strchrnul(path, ';');
1132 int dirlen = sep - path;
1133 if (dirlen)
1134 prog = lookup_prog(path, dirlen, cmd, isexe, exe_only);
1135 if (!*sep)
1136 break;
1137 path = sep + 1;
1138 }
1139 return prog;
1141}
1142static int do_putenv(char **env, const char *name, int size, int free_old);
1144/* used number of elements of environ array, including terminating NULL */
1146static int environ_size = 0;
1147/* allocated size of environ array, in bytes */
1148static int environ_alloc = 0;
1149/*
1151 * Create environment block suitable for CreateProcess. Merges current
1152 * process environment and the supplied environment changes.
1153 */
1154static wchar_t *make_environment_block(char **deltaenv)
1155{
1156 wchar_t *wenvblk = NULL;
1157 char **tmpenv;
1158 int i = 0, size = environ_size, wenvsz = 0, wenvpos = 0;
1159 while (deltaenv && deltaenv[i])
1161 i++;
1162 /* copy the environment, leaving space for changes */
1164 ALLOC_ARRAY(tmpenv, size + i);
1165 memcpy(tmpenv, environ, size * sizeof(char*));
1166 /* merge supplied environment changes into the temporary environment */
1168 for (i = 0; deltaenv && deltaenv[i]; i++)
1169 size = do_putenv(tmpenv, deltaenv[i], size, 0);
1170 /* create environment block from temporary environment */
1172 for (i = 0; tmpenv[i]; i++) {
1173 size = 2 * strlen(tmpenv[i]) + 2; /* +2 for final \0 */
1174 ALLOC_GROW(wenvblk, (wenvpos + size) * sizeof(wchar_t), wenvsz);
1175 wenvpos += xutftowcs(&wenvblk[wenvpos], tmpenv[i], size) + 1;
1176 }
1177 /* add final \0 terminator */
1178 wenvblk[wenvpos] = 0;
1179 free(tmpenv);
1180 return wenvblk;
1181}
1182struct pinfo_t {
1184 struct pinfo_t *next;
1185 pid_t pid;
1186 HANDLE proc;
1187};
1188static struct pinfo_t *pinfo = NULL;
1189CRITICAL_SECTION pinfo_cs;
1190static pid_t mingw_spawnve_fd(const char *cmd, const char **argv, char **deltaenv,
1192 const char *dir,
1193 int prepend_cmd, int fhin, int fhout, int fherr)
1194{
1195 STARTUPINFOW si;
1196 PROCESS_INFORMATION pi;
1197 struct strbuf args;
1198 wchar_t wcmd[MAX_PATH], wdir[MAX_PATH], *wargs, *wenvblk = NULL;
1199 unsigned flags = CREATE_UNICODE_ENVIRONMENT;
1200 BOOL ret;
1201 /* Determine whether or not we are associated to a console */
1203 HANDLE cons = CreateFile("CONOUT$", GENERIC_WRITE,
1204 FILE_SHARE_WRITE, NULL, OPEN_EXISTING,
1205 FILE_ATTRIBUTE_NORMAL, NULL);
1206 if (cons == INVALID_HANDLE_VALUE) {
1207 /* There is no console associated with this process.
1208 * Since the child is a console process, Windows
1209 * would normally create a console window. But
1210 * since we'll be redirecting std streams, we do
1211 * not need the console.
1212 * It is necessary to use DETACHED_PROCESS
1213 * instead of CREATE_NO_WINDOW to make ssh
1214 * recognize that it has no console.
1215 */
1216 flags |= DETACHED_PROCESS;
1217 } else {
1218 /* There is already a console. If we specified
1219 * DETACHED_PROCESS here, too, Windows would
1220 * disassociate the child from the console.
1221 * The same is true for CREATE_NO_WINDOW.
1222 * Go figure!
1223 */
1224 CloseHandle(cons);
1225 }
1226 memset(&si, 0, sizeof(si));
1227 si.cb = sizeof(si);
1228 si.dwFlags = STARTF_USESTDHANDLES;
1229 si.hStdInput = winansi_get_osfhandle(fhin);
1230 si.hStdOutput = winansi_get_osfhandle(fhout);
1231 si.hStdError = winansi_get_osfhandle(fherr);
1232 if (xutftowcs_path(wcmd, cmd) < 0)
1234 return -1;
1235 if (dir && xutftowcs_path(wdir, dir) < 0)
1236 return -1;
1237 /* concatenate argv, quoting args as we go */
1239 strbuf_init(&args, 0);
1240 if (prepend_cmd) {
1241 char *quoted = (char *)quote_arg(cmd);
1242 strbuf_addstr(&args, quoted);
1243 if (quoted != cmd)
1244 free(quoted);
1245 }
1246 for (; *argv; argv++) {
1247 char *quoted = (char *)quote_arg(*argv);
1248 if (*args.buf)
1249 strbuf_addch(&args, ' ');
1250 strbuf_addstr(&args, quoted);
1251 if (quoted != *argv)
1252 free(quoted);
1253 }
1254 ALLOC_ARRAY(wargs, st_add(st_mult(2, args.len), 1));
1256 xutftowcs(wargs, args.buf, 2 * args.len + 1);
1257 strbuf_release(&args);
1258 wenvblk = make_environment_block(deltaenv);
1260 memset(&pi, 0, sizeof(pi));
1262 ret = CreateProcessW(wcmd, wargs, NULL, NULL, TRUE, flags,
1263 wenvblk, dir ? wdir : NULL, &si, &pi);
1264 free(wenvblk);
1266 free(wargs);
1267 if (!ret) {
1269 errno = ENOENT;
1270 return -1;
1271 }
1272 CloseHandle(pi.hThread);
1273 /*
1275 * The process ID is the human-readable identifier of the process
1276 * that we want to present in log and error messages. The handle
1277 * is not useful for this purpose. But we cannot close it, either,
1278 * because it is not possible to turn a process ID into a process
1279 * handle after the process terminated.
1280 * Keep the handle in a list for waitpid.
1281 */
1282 EnterCriticalSection(&pinfo_cs);
1283 {
1284 struct pinfo_t *info = xmalloc(sizeof(struct pinfo_t));
1285 info->pid = pi.dwProcessId;
1286 info->proc = pi.hProcess;
1287 info->next = pinfo;
1288 pinfo = info;
1289 }
1290 LeaveCriticalSection(&pinfo_cs);
1291 return (pid_t)pi.dwProcessId;
1293}
1294static pid_t mingw_spawnv(const char *cmd, const char **argv, int prepend_cmd)
1296{
1297 return mingw_spawnve_fd(cmd, argv, NULL, NULL, prepend_cmd, 0, 1, 2);
1298}
1299pid_t mingw_spawnvpe(const char *cmd, const char **argv, char **deltaenv,
1301 const char *dir,
1302 int fhin, int fhout, int fherr)
1303{
1304 pid_t pid;
1305 char *prog = path_lookup(cmd, 0);
1306 if (!prog) {
1308 errno = ENOENT;
1309 pid = -1;
1310 }
1311 else {
1312 const char *interpr = parse_interpreter(prog);
1313 if (interpr) {
1315 const char *argv0 = argv[0];
1316 char *iprog = path_lookup(interpr, 1);
1317 argv[0] = prog;
1318 if (!iprog) {
1319 errno = ENOENT;
1320 pid = -1;
1321 }
1322 else {
1323 pid = mingw_spawnve_fd(iprog, argv, deltaenv, dir, 1,
1324 fhin, fhout, fherr);
1325 free(iprog);
1326 }
1327 argv[0] = argv0;
1328 }
1329 else
1330 pid = mingw_spawnve_fd(prog, argv, deltaenv, dir, 0,
1331 fhin, fhout, fherr);
1332 free(prog);
1333 }
1334 return pid;
1335}
1336static int try_shell_exec(const char *cmd, char *const *argv)
1338{
1339 const char *interpr = parse_interpreter(cmd);
1340 char *prog;
1341 int pid = 0;
1342 if (!interpr)
1344 return 0;
1345 prog = path_lookup(interpr, 1);
1346 if (prog) {
1347 int argc = 0;
1348 const char **argv2;
1349 while (argv[argc]) argc++;
1350 ALLOC_ARRAY(argv2, argc + 1);
1351 argv2[0] = (char *)cmd; /* full path to the script file */
1352 memcpy(&argv2[1], &argv[1], sizeof(*argv) * argc);
1353 pid = mingw_spawnv(prog, argv2, 1);
1354 if (pid >= 0) {
1355 int status;
1356 if (waitpid(pid, &status, 0) < 0)
1357 status = 255;
1358 exit(status);
1359 }
1360 pid = 1; /* indicate that we tried but failed */
1361 free(prog);
1362 free(argv2);
1363 }
1364 return pid;
1365}
1366int mingw_execv(const char *cmd, char *const *argv)
1368{
1369 /* check if git_command is a shell script */
1370 if (!try_shell_exec(cmd, argv)) {
1371 int pid, status;
1372 pid = mingw_spawnv(cmd, (const char **)argv, 0);
1374 if (pid < 0)
1375 return -1;
1376 if (waitpid(pid, &status, 0) < 0)
1377 status = 255;
1378 exit(status);
1379 }
1380 return -1;
1381}
1382int mingw_execvp(const char *cmd, char *const *argv)
1384{
1385 char *prog = path_lookup(cmd, 0);
1386 if (prog) {
1388 mingw_execv(prog, argv);
1389 free(prog);
1390 } else
1391 errno = ENOENT;
1392 return -1;
1394}
1395int mingw_kill(pid_t pid, int sig)
1397{
1398 if (pid > 0 && sig == SIGTERM) {
1399 HANDLE h = OpenProcess(PROCESS_TERMINATE, FALSE, pid);
1400 if (TerminateProcess(h, -1)) {
1402 CloseHandle(h);
1403 return 0;
1404 }
1405 errno = err_win_to_posix(GetLastError());
1407 CloseHandle(h);
1408 return -1;
1409 } else if (pid > 0 && sig == 0) {
1410 HANDLE h = OpenProcess(PROCESS_QUERY_INFORMATION, FALSE, pid);
1411 if (h) {
1412 CloseHandle(h);
1413 return 0;
1414 }
1415 }
1416 errno = EINVAL;
1418 return -1;
1419}
1420/*
1422 * Compare environment entries by key (i.e. stopping at '=' or '\0').
1423 */
1424static int compareenv(const void *v1, const void *v2)
1425{
1426 const char *e1 = *(const char**)v1;
1427 const char *e2 = *(const char**)v2;
1428 for (;;) {
1430 int c1 = *e1++;
1431 int c2 = *e2++;
1432 c1 = (c1 == '=') ? 0 : tolower(c1);
1433 c2 = (c2 == '=') ? 0 : tolower(c2);
1434 if (c1 > c2)
1435 return 1;
1436 if (c1 < c2)
1437 return -1;
1438 if (c1 == 0)
1439 return 0;
1440 }
1441}
1442static int bsearchenv(char **env, const char *name, size_t size)
1444{
1445 unsigned low = 0, high = size;
1446 while (low < high) {
1447 unsigned mid = low + ((high - low) >> 1);
1448 int cmp = compareenv(&env[mid], &name);
1449 if (cmp < 0)
1450 low = mid + 1;
1451 else if (cmp > 0)
1452 high = mid;
1453 else
1454 return mid;
1455 }
1456 return ~low; /* not found, return 1's complement of insert position */
1457}
1458/*
1460 * If name contains '=', then sets the variable, otherwise it unsets it
1461 * Size includes the terminating NULL. Env must have room for size + 1 entries
1462 * (in case of insert). Returns the new size. Optionally frees removed entries.
1463 */
1464static int do_putenv(char **env, const char *name, int size, int free_old)
1465{
1466 int i = bsearchenv(env, name, size - 1);
1467 /* optionally free removed / replaced entry */
1469 if (i >= 0 && free_old)
1470 free(env[i]);
1471 if (strchr(name, '=')) {
1473 /* if new value ('key=value') is specified, insert or replace entry */
1474 if (i < 0) {
1475 i = ~i;
1476 memmove(&env[i + 1], &env[i], (size - i) * sizeof(char*));
1477 size++;
1478 }
1479 env[i] = (char*) name;
1480 } else if (i >= 0) {
1481 /* otherwise ('key') remove existing entry */
1482 size--;
1483 memmove(&env[i], &env[i + 1], (size - i) * sizeof(char*));
1484 }
1485 return size;
1486}
1487char *mingw_getenv(const char *name)
1489{
1490 char *value;
1491 int pos = bsearchenv(environ, name, environ_size - 1);
1492 if (pos < 0)
1493 return NULL;
1494 value = strchr(environ[pos], '=');
1495 return value ? &value[1] : NULL;
1496}
1497int mingw_putenv(const char *namevalue)
1499{
1500 ALLOC_GROW(environ, (environ_size + 1) * sizeof(char*), environ_alloc);
1501 environ_size = do_putenv(environ, namevalue, environ_size, 1);
1502 return 0;
1503}
1504/*
1506 * Note, this isn't a complete replacement for getaddrinfo. It assumes
1507 * that service contains a numerical port, or that it is null. It
1508 * does a simple search using gethostbyname, and returns one IPv4 host
1509 * if one was found.
1510 */
1511static int WSAAPI getaddrinfo_stub(const char *node, const char *service,
1512 const struct addrinfo *hints,
1513 struct addrinfo **res)
1514{
1515 struct hostent *h = NULL;
1516 struct addrinfo *ai;
1517 struct sockaddr_in *sin;
1518 if (node) {
1520 h = gethostbyname(node);
1521 if (!h)
1522 return WSAGetLastError();
1523 }
1524 ai = xmalloc(sizeof(struct addrinfo));
1526 *res = ai;
1527 ai->ai_flags = 0;
1528 ai->ai_family = AF_INET;
1529 ai->ai_socktype = hints ? hints->ai_socktype : 0;
1530 switch (ai->ai_socktype) {
1531 case SOCK_STREAM:
1532 ai->ai_protocol = IPPROTO_TCP;
1533 break;
1534 case SOCK_DGRAM:
1535 ai->ai_protocol = IPPROTO_UDP;
1536 break;
1537 default:
1538 ai->ai_protocol = 0;
1539 break;
1540 }
1541 ai->ai_addrlen = sizeof(struct sockaddr_in);
1542 if (hints && (hints->ai_flags & AI_CANONNAME))
1543 ai->ai_canonname = h ? xstrdup(h->h_name) : NULL;
1544 else
1545 ai->ai_canonname = NULL;
1546 sin = xcalloc(1, ai->ai_addrlen);
1548 sin->sin_family = AF_INET;
1549 /* Note: getaddrinfo is supposed to allow service to be a string,
1550 * which should be looked up using getservbyname. This is
1551 * currently not implemented */
1552 if (service)
1553 sin->sin_port = htons(atoi(service));
1554 if (h)
1555 sin->sin_addr = *(struct in_addr *)h->h_addr;
1556 else if (hints && (hints->ai_flags & AI_PASSIVE))
1557 sin->sin_addr.s_addr = INADDR_ANY;
1558 else
1559 sin->sin_addr.s_addr = INADDR_LOOPBACK;
1560 ai->ai_addr = (struct sockaddr *)sin;
1561 ai->ai_next = NULL;
1562 return 0;
1563}
1564static void WSAAPI freeaddrinfo_stub(struct addrinfo *res)
1566{
1567 free(res->ai_canonname);
1568 free(res->ai_addr);
1569 free(res);
1570}
1571static int WSAAPI getnameinfo_stub(const struct sockaddr *sa, socklen_t salen,
1573 char *host, DWORD hostlen,
1574 char *serv, DWORD servlen, int flags)
1575{
1576 const struct sockaddr_in *sin = (const struct sockaddr_in *)sa;
1577 if (sa->sa_family != AF_INET)
1578 return EAI_FAMILY;
1579 if (!host && !serv)
1580 return EAI_NONAME;
1581 if (host && hostlen > 0) {
1583 struct hostent *ent = NULL;
1584 if (!(flags & NI_NUMERICHOST))
1585 ent = gethostbyaddr((const char *)&sin->sin_addr,
1586 sizeof(sin->sin_addr), AF_INET);
1587 if (ent)
1589 snprintf(host, hostlen, "%s", ent->h_name);
1590 else if (flags & NI_NAMEREQD)
1591 return EAI_NONAME;
1592 else
1593 snprintf(host, hostlen, "%s", inet_ntoa(sin->sin_addr));
1594 }
1595 if (serv && servlen > 0) {
1597 struct servent *ent = NULL;
1598 if (!(flags & NI_NUMERICSERV))
1599 ent = getservbyport(sin->sin_port,
1600 flags & NI_DGRAM ? "udp" : "tcp");
1601 if (ent)
1603 snprintf(serv, servlen, "%s", ent->s_name);
1604 else
1605 snprintf(serv, servlen, "%d", ntohs(sin->sin_port));
1606 }
1607 return 0;
1609}
1610static HMODULE ipv6_dll = NULL;
1612static void (WSAAPI *ipv6_freeaddrinfo)(struct addrinfo *res);
1613static int (WSAAPI *ipv6_getaddrinfo)(const char *node, const char *service,
1614 const struct addrinfo *hints,
1615 struct addrinfo **res);
1616static int (WSAAPI *ipv6_getnameinfo)(const struct sockaddr *sa, socklen_t salen,
1617 char *host, DWORD hostlen,
1618 char *serv, DWORD servlen, int flags);
1619/*
1620 * gai_strerror is an inline function in the ws2tcpip.h header, so we
1621 * don't need to try to load that one dynamically.
1622 */
1623static void socket_cleanup(void)
1625{
1626 WSACleanup();
1627 if (ipv6_dll)
1628 FreeLibrary(ipv6_dll);
1629 ipv6_dll = NULL;
1630 ipv6_freeaddrinfo = freeaddrinfo_stub;
1631 ipv6_getaddrinfo = getaddrinfo_stub;
1632 ipv6_getnameinfo = getnameinfo_stub;
1633}
1634static void ensure_socket_initialization(void)
1636{
1637 WSADATA wsa;
1638 static int initialized = 0;
1639 const char *libraries[] = { "ws2_32.dll", "wship6.dll", NULL };
1640 const char **name;
1641 if (initialized)
1643 return;
1644 if (WSAStartup(MAKEWORD(2,2), &wsa))
1646 die("unable to initialize winsock subsystem, error %d",
1647 WSAGetLastError());
1648 for (name = libraries; *name; name++) {
1650 ipv6_dll = LoadLibraryExA(*name, NULL,
1651 LOAD_LIBRARY_SEARCH_SYSTEM32);
1652 if (!ipv6_dll)
1653 continue;
1654 ipv6_freeaddrinfo = (void (WSAAPI *)(struct addrinfo *))
1656 GetProcAddress(ipv6_dll, "freeaddrinfo");
1657 ipv6_getaddrinfo = (int (WSAAPI *)(const char *, const char *,
1658 const struct addrinfo *,
1659 struct addrinfo **))
1660 GetProcAddress(ipv6_dll, "getaddrinfo");
1661 ipv6_getnameinfo = (int (WSAAPI *)(const struct sockaddr *,
1662 socklen_t, char *, DWORD,
1663 char *, DWORD, int))
1664 GetProcAddress(ipv6_dll, "getnameinfo");
1665 if (!ipv6_freeaddrinfo || !ipv6_getaddrinfo || !ipv6_getnameinfo) {
1666 FreeLibrary(ipv6_dll);
1667 ipv6_dll = NULL;
1668 } else
1669 break;
1670 }
1671 if (!ipv6_freeaddrinfo || !ipv6_getaddrinfo || !ipv6_getnameinfo) {
1672 ipv6_freeaddrinfo = freeaddrinfo_stub;
1673 ipv6_getaddrinfo = getaddrinfo_stub;
1674 ipv6_getnameinfo = getnameinfo_stub;
1675 }
1676 atexit(socket_cleanup);
1678 initialized = 1;
1679}
1680#undef gethostname
1682int mingw_gethostname(char *name, int namelen)
1683{
1684 ensure_socket_initialization();
1685 return gethostname(name, namelen);
1686}
1687#undef gethostbyname
1689struct hostent *mingw_gethostbyname(const char *host)
1690{
1691 ensure_socket_initialization();
1692 return gethostbyname(host);
1693}
1694void mingw_freeaddrinfo(struct addrinfo *res)
1696{
1697 ipv6_freeaddrinfo(res);
1698}
1699int mingw_getaddrinfo(const char *node, const char *service,
1701 const struct addrinfo *hints, struct addrinfo **res)
1702{
1703 ensure_socket_initialization();
1704 return ipv6_getaddrinfo(node, service, hints, res);
1705}
1706int mingw_getnameinfo(const struct sockaddr *sa, socklen_t salen,
1708 char *host, DWORD hostlen, char *serv, DWORD servlen,
1709 int flags)
1710{
1711 ensure_socket_initialization();
1712 return ipv6_getnameinfo(sa, salen, host, hostlen, serv, servlen, flags);
1713}
1714int mingw_socket(int domain, int type, int protocol)
1716{
1717 int sockfd;
1718 SOCKET s;
1719 ensure_socket_initialization();
1721 s = WSASocket(domain, type, protocol, NULL, 0, 0);
1722 if (s == INVALID_SOCKET) {
1723 /*
1724 * WSAGetLastError() values are regular BSD error codes
1725 * biased by WSABASEERR.
1726 * However, strerror() does not know about networking
1727 * specific errors, which are values beginning at 38 or so.
1728 * Therefore, we choose to leave the biased error code
1729 * in errno so that _if_ someone looks up the code somewhere,
1730 * then it is at least the number that are usually listed.
1731 */
1732 errno = WSAGetLastError();
1733 return -1;
1734 }
1735 /* convert into a file descriptor */
1736 if ((sockfd = _open_osfhandle(s, O_RDWR|O_BINARY)) < 0) {
1737 closesocket(s);
1738 return error("unable to make a socket file descriptor: %s",
1739 strerror(errno));
1740 }
1741 return sockfd;
1742}
1743#undef connect
1745int mingw_connect(int sockfd, struct sockaddr *sa, size_t sz)
1746{
1747 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
1748 return connect(s, sa, sz);
1749}
1750#undef bind
1752int mingw_bind(int sockfd, struct sockaddr *sa, size_t sz)
1753{
1754 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
1755 return bind(s, sa, sz);
1756}
1757#undef setsockopt
1759int mingw_setsockopt(int sockfd, int lvl, int optname, void *optval, int optlen)
1760{
1761 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
1762 return setsockopt(s, lvl, optname, (const char*)optval, optlen);
1763}
1764#undef shutdown
1766int mingw_shutdown(int sockfd, int how)
1767{
1768 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
1769 return shutdown(s, how);
1770}
1771#undef listen
1773int mingw_listen(int sockfd, int backlog)
1774{
1775 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
1776 return listen(s, backlog);
1777}
1778#undef accept
1780int mingw_accept(int sockfd1, struct sockaddr *sa, socklen_t *sz)
1781{
1782 int sockfd2;
1783 SOCKET s1 = (SOCKET)_get_osfhandle(sockfd1);
1785 SOCKET s2 = accept(s1, sa, sz);
1786 /* convert into a file descriptor */
1788 if ((sockfd2 = _open_osfhandle(s2, O_RDWR|O_BINARY)) < 0) {
1789 int err = errno;
1790 closesocket(s2);
1791 return error("unable to make a socket file descriptor: %s",
1792 strerror(err));
1793 }
1794 return sockfd2;
1795}
1796#undef rename
1798int mingw_rename(const char *pold, const char *pnew)
1799{
1800 DWORD attrs, gle;
1801 int tries = 0;
1802 wchar_t wpold[MAX_PATH], wpnew[MAX_PATH];
1803 if (xutftowcs_path(wpold, pold) < 0 || xutftowcs_path(wpnew, pnew) < 0)
1804 return -1;
1805 /*
1807 * Try native rename() first to get errno right.
1808 * It is based on MoveFile(), which cannot overwrite existing files.
1809 */
1810 if (!_wrename(wpold, wpnew))
1811 return 0;
1812 if (errno != EEXIST)
1813 return -1;
1814repeat:
1815 if (MoveFileExW(wpold, wpnew, MOVEFILE_REPLACE_EXISTING))
1816 return 0;
1817 /* TODO: translate more errors */
1818 gle = GetLastError();
1819 if (gle == ERROR_ACCESS_DENIED &&
1820 (attrs = GetFileAttributesW(wpnew)) != INVALID_FILE_ATTRIBUTES) {
1821 if (attrs & FILE_ATTRIBUTE_DIRECTORY) {
1822 DWORD attrsold = GetFileAttributesW(wpold);
1823 if (attrsold == INVALID_FILE_ATTRIBUTES ||
1824 !(attrsold & FILE_ATTRIBUTE_DIRECTORY))
1825 errno = EISDIR;
1826 else if (!_wrmdir(wpnew))
1827 goto repeat;
1828 return -1;
1829 }
1830 if ((attrs & FILE_ATTRIBUTE_READONLY) &&
1831 SetFileAttributesW(wpnew, attrs & ~FILE_ATTRIBUTE_READONLY)) {
1832 if (MoveFileExW(wpold, wpnew, MOVEFILE_REPLACE_EXISTING))
1833 return 0;
1834 gle = GetLastError();
1835 /* revert file attributes on failure */
1836 SetFileAttributesW(wpnew, attrs);
1837 }
1838 }
1839 if (tries < ARRAY_SIZE(delay) && gle == ERROR_ACCESS_DENIED) {
1840 /*
1841 * We assume that some other process had the source or
1842 * destination file open at the wrong moment and retry.
1843 * In order to give the other process a higher chance to
1844 * complete its operation, we give up our time slice now.
1845 * If we have to retry again, we do sleep a bit.
1846 */
1847 Sleep(delay[tries]);
1848 tries++;
1849 goto repeat;
1850 }
1851 if (gle == ERROR_ACCESS_DENIED &&
1852 ask_yes_no_if_possible("Rename from '%s' to '%s' failed. "
1853 "Should I try again?", pold, pnew))
1854 goto repeat;
1855 errno = EACCES;
1857 return -1;
1858}
1859/*
1861 * Note that this doesn't return the actual pagesize, but
1862 * the allocation granularity. If future Windows specific git code
1863 * needs the real getpagesize function, we need to find another solution.
1864 */
1865int mingw_getpagesize(void)
1866{
1867 SYSTEM_INFO si;
1868 GetSystemInfo(&si);
1869 return si.dwAllocationGranularity;
1870}
1871/* See https://msdn.microsoft.com/en-us/library/windows/desktop/ms724435.aspx */
1873enum EXTENDED_NAME_FORMAT {
1874 NameDisplay = 3,
1875 NameUserPrincipal = 8
1876};
1877static char *get_extended_user_info(enum EXTENDED_NAME_FORMAT type)
1879{
1880 DECLARE_PROC_ADDR(secur32.dll, BOOL, GetUserNameExW,
1881 enum EXTENDED_NAME_FORMAT, LPCWSTR, PULONG);
1882 static wchar_t wbuffer[1024];
1883 DWORD len;
1884 if (!INIT_PROC_ADDR(GetUserNameExW))
1886 return NULL;
1887 len = ARRAY_SIZE(wbuffer);
1889 if (GetUserNameExW(type, wbuffer, &len)) {
1890 char *converted = xmalloc((len *= 3));
1891 if (xwcstoutf(converted, wbuffer, len) >= 0)
1892 return converted;
1893 free(converted);
1894 }
1895 return NULL;
1897}
1898char *mingw_query_user_email(void)
1900{
1901 return get_extended_user_info(NameUserPrincipal);
1902}
1903struct passwd *getpwuid(int uid)
1905{
1906 static unsigned initialized;
1907 static char user_name[100];
1908 static struct passwd *p;
1909 DWORD len;
1910 if (initialized)
1912 return p;
1913 len = sizeof(user_name);
1915 if (!GetUserName(user_name, &len)) {
1916 initialized = 1;
1917 return NULL;
1918 }
1919 p = xmalloc(sizeof(*p));
1921 p->pw_name = user_name;
1922 p->pw_gecos = get_extended_user_info(NameDisplay);
1923 if (!p->pw_gecos)
1924 p->pw_gecos = "unknown";
1925 p->pw_dir = NULL;
1926 initialized = 1;
1928 return p;
1929}
1930static HANDLE timer_event;
1932static HANDLE timer_thread;
1933static int timer_interval;
1934static int one_shot;
1935static sig_handler_t timer_fn = SIG_DFL, sigint_fn = SIG_DFL;
1936/* The timer works like this:
1938 * The thread, ticktack(), is a trivial routine that most of the time
1939 * only waits to receive the signal to terminate. The main thread tells
1940 * the thread to terminate by setting the timer_event to the signalled
1941 * state.
1942 * But ticktack() interrupts the wait state after the timer's interval
1943 * length to call the signal handler.
1944 */
1945static unsigned __stdcall ticktack(void *dummy)
1947{
1948 while (WaitForSingleObject(timer_event, timer_interval) == WAIT_TIMEOUT) {
1949 mingw_raise(SIGALRM);
1950 if (one_shot)
1951 break;
1952 }
1953 return 0;
1954}
1955static int start_timer_thread(void)
1957{
1958 timer_event = CreateEvent(NULL, FALSE, FALSE, NULL);
1959 if (timer_event) {
1960 timer_thread = (HANDLE) _beginthreadex(NULL, 0, ticktack, NULL, 0, NULL);
1961 if (!timer_thread )
1962 return errno = ENOMEM,
1963 error("cannot start timer thread");
1964 } else
1965 return errno = ENOMEM,
1966 error("cannot allocate resources for timer");
1967 return 0;
1968}
1969static void stop_timer_thread(void)
1971{
1972 if (timer_event)
1973 SetEvent(timer_event); /* tell thread to terminate */
1974 if (timer_thread) {
1975 int rc = WaitForSingleObject(timer_thread, 1000);
1976 if (rc == WAIT_TIMEOUT)
1977 error("timer thread did not terminate timely");
1978 else if (rc != WAIT_OBJECT_0)
1979 error("waiting for timer thread failed: %lu",
1980 GetLastError());
1981 CloseHandle(timer_thread);
1982 }
1983 if (timer_event)
1984 CloseHandle(timer_event);
1985 timer_event = NULL;
1986 timer_thread = NULL;
1987}
1988static inline int is_timeval_eq(const struct timeval *i1, const struct timeval *i2)
1990{
1991 return i1->tv_sec == i2->tv_sec && i1->tv_usec == i2->tv_usec;
1992}
1993int setitimer(int type, struct itimerval *in, struct itimerval *out)
1995{
1996 static const struct timeval zero;
1997 static int atexit_done;
1998 if (out != NULL)
2000 return errno = EINVAL,
2001 error("setitimer param 3 != NULL not implemented");
2002 if (!is_timeval_eq(&in->it_interval, &zero) &&
2003 !is_timeval_eq(&in->it_interval, &in->it_value))
2004 return errno = EINVAL,
2005 error("setitimer: it_interval must be zero or eq it_value");
2006 if (timer_thread)
2008 stop_timer_thread();
2009 if (is_timeval_eq(&in->it_value, &zero) &&
2011 is_timeval_eq(&in->it_interval, &zero))
2012 return 0;
2013 timer_interval = in->it_value.tv_sec * 1000 + in->it_value.tv_usec / 1000;
2015 one_shot = is_timeval_eq(&in->it_interval, &zero);
2016 if (!atexit_done) {
2017 atexit(stop_timer_thread);
2018 atexit_done = 1;
2019 }
2020 return start_timer_thread();
2021}
2022int sigaction(int sig, struct sigaction *in, struct sigaction *out)
2024{
2025 if (sig != SIGALRM)
2026 return errno = EINVAL,
2027 error("sigaction only implemented for SIGALRM");
2028 if (out != NULL)
2029 return errno = EINVAL,
2030 error("sigaction: param 3 != NULL not implemented");
2031 timer_fn = in->sa_handler;
2033 return 0;
2034}
2035#undef signal
2037sig_handler_t mingw_signal(int sig, sig_handler_t handler)
2038{
2039 sig_handler_t old;
2040 switch (sig) {
2042 case SIGALRM:
2043 old = timer_fn;
2044 timer_fn = handler;
2045 break;
2046 case SIGINT:
2048 old = sigint_fn;
2049 sigint_fn = handler;
2050 break;
2051 default:
2053 return signal(sig, handler);
2054 }
2055 return old;
2057}
2058#undef raise
2060int mingw_raise(int sig)
2061{
2062 switch (sig) {
2063 case SIGALRM:
2064 if (timer_fn == SIG_DFL) {
2065 if (isatty(STDERR_FILENO))
2066 fputs("Alarm clock\n", stderr);
2067 exit(128 + SIGALRM);
2068 } else if (timer_fn != SIG_IGN)
2069 timer_fn(SIGALRM);
2070 return 0;
2071 case SIGINT:
2073 if (sigint_fn == SIG_DFL)
2074 exit(128 + SIGINT);
2075 else if (sigint_fn != SIG_IGN)
2076 sigint_fn(SIGINT);
2077 return 0;
2078 default:
2080 return raise(sig);
2081 }
2082}
2083int link(const char *oldpath, const char *newpath)
2085{
2086 typedef BOOL (WINAPI *T)(LPCWSTR, LPCWSTR, LPSECURITY_ATTRIBUTES);
2087 static T create_hard_link = NULL;
2088 wchar_t woldpath[MAX_PATH], wnewpath[MAX_PATH];
2089 if (xutftowcs_path(woldpath, oldpath) < 0 ||
2090 xutftowcs_path(wnewpath, newpath) < 0)
2091 return -1;
2092 if (!create_hard_link) {
2094 create_hard_link = (T) GetProcAddress(
2095 GetModuleHandle("kernel32.dll"), "CreateHardLinkW");
2096 if (!create_hard_link)
2097 create_hard_link = (T)-1;
2098 }
2099 if (create_hard_link == (T)-1) {
2100 errno = ENOSYS;
2101 return -1;
2102 }
2103 if (!create_hard_link(wnewpath, woldpath, NULL)) {
2104 errno = err_win_to_posix(GetLastError());
2105 return -1;
2106 }
2107 return 0;
2108}
2109pid_t waitpid(pid_t pid, int *status, int options)
2111{
2112 HANDLE h = OpenProcess(SYNCHRONIZE | PROCESS_QUERY_INFORMATION,
2113 FALSE, pid);
2114 if (!h) {
2115 errno = ECHILD;
2116 return -1;
2117 }
2118 if (pid > 0 && options & WNOHANG) {
2120 if (WAIT_OBJECT_0 != WaitForSingleObject(h, 0)) {
2121 CloseHandle(h);
2122 return 0;
2123 }
2124 options &= ~WNOHANG;
2125 }
2126 if (options == 0) {
2128 struct pinfo_t **ppinfo;
2129 if (WaitForSingleObject(h, INFINITE) != WAIT_OBJECT_0) {
2130 CloseHandle(h);
2131 return 0;
2132 }
2133 if (status)
2135 GetExitCodeProcess(h, (LPDWORD)status);
2136 EnterCriticalSection(&pinfo_cs);
2138 ppinfo = &pinfo;
2140 while (*ppinfo) {
2141 struct pinfo_t *info = *ppinfo;
2142 if (info->pid == pid) {
2143 CloseHandle(info->proc);
2144 *ppinfo = info->next;
2145 free(info);
2146 break;
2147 }
2148 ppinfo = &info->next;
2149 }
2150 LeaveCriticalSection(&pinfo_cs);
2152 CloseHandle(h);
2154 return pid;
2155 }
2156 CloseHandle(h);
2157 errno = EINVAL;
2159 return -1;
2160}
2161int mingw_skip_dos_drive_prefix(char **path)
2163{
2164 int ret = has_dos_drive_prefix(*path);
2165 *path += ret;
2166 return ret;
2167}
2168int mingw_offset_1st_component(const char *path)
2170{
2171 char *pos = (char *)path;
2172 /* unc paths */
2174 if (!skip_dos_drive_prefix(&pos) &&
2175 is_dir_sep(pos[0]) && is_dir_sep(pos[1])) {
2176 /* skip server name */
2177 pos = strpbrk(pos + 2, "\\/");
2178 if (!pos)
2179 return 0; /* Error: malformed unc path */
2180 do {
2182 pos++;
2183 } while (*pos && !is_dir_sep(*pos));
2184 }
2185 return pos + is_dir_sep(*pos) - path;
2187}
2188int xutftowcsn(wchar_t *wcs, const char *utfs, size_t wcslen, int utflen)
2190{
2191 int upos = 0, wpos = 0;
2192 const unsigned char *utf = (const unsigned char*) utfs;
2193 if (!utf || !wcs || wcslen < 1) {
2194 errno = EINVAL;
2195 return -1;
2196 }
2197 /* reserve space for \0 */
2198 wcslen--;
2199 if (utflen < 0)
2200 utflen = INT_MAX;
2201 while (upos < utflen) {
2203 int c = utf[upos++] & 0xff;
2204 if (utflen == INT_MAX && c == 0)
2205 break;
2206 if (wpos >= wcslen) {
2208 wcs[wpos] = 0;
2209 errno = ERANGE;
2210 return -1;
2211 }
2212 if (c < 0x80) {
2214 /* ASCII */
2215 wcs[wpos++] = c;
2216 } else if (c >= 0xc2 && c < 0xe0 && upos < utflen &&
2217 (utf[upos] & 0xc0) == 0x80) {
2218 /* 2-byte utf-8 */
2219 c = ((c & 0x1f) << 6);
2220 c |= (utf[upos++] & 0x3f);
2221 wcs[wpos++] = c;
2222 } else if (c >= 0xe0 && c < 0xf0 && upos + 1 < utflen &&
2223 !(c == 0xe0 && utf[upos] < 0xa0) && /* over-long encoding */
2224 (utf[upos] & 0xc0) == 0x80 &&
2225 (utf[upos + 1] & 0xc0) == 0x80) {
2226 /* 3-byte utf-8 */
2227 c = ((c & 0x0f) << 12);
2228 c |= ((utf[upos++] & 0x3f) << 6);
2229 c |= (utf[upos++] & 0x3f);
2230 wcs[wpos++] = c;
2231 } else if (c >= 0xf0 && c < 0xf5 && upos + 2 < utflen &&
2232 wpos + 1 < wcslen &&
2233 !(c == 0xf0 && utf[upos] < 0x90) && /* over-long encoding */
2234 !(c == 0xf4 && utf[upos] >= 0x90) && /* > \u10ffff */
2235 (utf[upos] & 0xc0) == 0x80 &&
2236 (utf[upos + 1] & 0xc0) == 0x80 &&
2237 (utf[upos + 2] & 0xc0) == 0x80) {
2238 /* 4-byte utf-8: convert to \ud8xx \udcxx surrogate pair */
2239 c = ((c & 0x07) << 18);
2240 c |= ((utf[upos++] & 0x3f) << 12);
2241 c |= ((utf[upos++] & 0x3f) << 6);
2242 c |= (utf[upos++] & 0x3f);
2243 c -= 0x10000;
2244 wcs[wpos++] = 0xd800 | (c >> 10);
2245 wcs[wpos++] = 0xdc00 | (c & 0x3ff);
2246 } else if (c >= 0xa0) {
2247 /* invalid utf-8 byte, printable unicode char: convert 1:1 */
2248 wcs[wpos++] = c;
2249 } else {
2250 /* invalid utf-8 byte, non-printable unicode: convert to hex */
2251 static const char *hex = "0123456789abcdef";
2252 wcs[wpos++] = hex[c >> 4];
2253 if (wpos < wcslen)
2254 wcs[wpos++] = hex[c & 0x0f];
2255 }
2256 }
2257 wcs[wpos] = 0;
2258 return wpos;
2259}
2260int xwcstoutf(char *utf, const wchar_t *wcs, size_t utflen)
2262{
2263 if (!wcs || !utf || utflen < 1) {
2264 errno = EINVAL;
2265 return -1;
2266 }
2267 utflen = WideCharToMultiByte(CP_UTF8, 0, wcs, -1, utf, utflen, NULL, NULL);
2268 if (utflen)
2269 return utflen - 1;
2270 errno = ERANGE;
2271 return -1;
2272}
2273static void setup_windows_environment(void)
2275{
2276 char *tmp = getenv("TMPDIR");
2277 /* on Windows it is TMP and TEMP */
2279 if (!tmp) {
2280 if (!(tmp = getenv("TMP")))
2281 tmp = getenv("TEMP");
2282 if (tmp) {
2283 setenv("TMPDIR", tmp, 1);
2284 tmp = getenv("TMPDIR");
2285 }
2286 }
2287 if (tmp) {
2289 /*
2290 * Convert all dir separators to forward slashes,
2291 * to help shell commands called from the Git
2292 * executable (by not mistaking the dir separators
2293 * for escape characters).
2294 */
2295 convert_slashes(tmp);
2296 }
2297 /* simulate TERM to enable auto-color (see color.c) */
2299 if (!getenv("TERM"))
2300 setenv("TERM", "cygwin", 1);
2301}
2302/*
2304 * Disable MSVCRT command line wildcard expansion (__getmainargs called from
2305 * mingw startup code, see init.c in mingw runtime).
2306 */
2307int _CRT_glob = 0;
2308typedef struct {
2310 int newmode;
2311} _startupinfo;
2312extern int __wgetmainargs(int *argc, wchar_t ***argv, wchar_t ***env, int glob,
2314 _startupinfo *si);
2315static NORETURN void die_startup(void)
2317{
2318 fputs("fatal: not enough memory for initialization", stderr);
2319 exit(128);
2320}
2321static void *malloc_startup(size_t size)
2323{
2324 void *result = malloc(size);
2325 if (!result)
2326 die_startup();
2327 return result;
2328}
2329static char *wcstoutfdup_startup(char *buffer, const wchar_t *wcs, size_t len)
2331{
2332 len = xwcstoutf(buffer, wcs, len) + 1;
2333 return memcpy(malloc_startup(len), buffer, len);
2334}
2335static void maybe_redirect_std_handle(const wchar_t *key, DWORD std_id, int fd,
2337 DWORD desired_access, DWORD flags)
2338{
2339 DWORD create_flag = fd ? OPEN_ALWAYS : OPEN_EXISTING;
2340 wchar_t buf[MAX_PATH];
2341 DWORD max = ARRAY_SIZE(buf);
2342 HANDLE handle;
2343 DWORD ret = GetEnvironmentVariableW(key, buf, max);
2344 if (!ret || ret >= max)
2346 return;
2347 /* make sure this does not leak into child processes */
2349 SetEnvironmentVariableW(key, NULL);
2350 if (!wcscmp(buf, L"off")) {
2351 close(fd);
2352 handle = GetStdHandle(std_id);
2353 if (handle != INVALID_HANDLE_VALUE)
2354 CloseHandle(handle);
2355 return;
2356 }
2357 if (std_id == STD_ERROR_HANDLE && !wcscmp(buf, L"2>&1")) {
2358 handle = GetStdHandle(STD_OUTPUT_HANDLE);
2359 if (handle == INVALID_HANDLE_VALUE) {
2360 close(fd);
2361 handle = GetStdHandle(std_id);
2362 if (handle != INVALID_HANDLE_VALUE)
2363 CloseHandle(handle);
2364 } else {
2365 int new_fd = _open_osfhandle((intptr_t)handle, O_BINARY);
2366 SetStdHandle(std_id, handle);
2367 dup2(new_fd, fd);
2368 /* do *not* close the new_fd: that would close stdout */
2369 }
2370 return;
2371 }
2372 handle = CreateFileW(buf, desired_access, 0, NULL, create_flag,
2373 flags, NULL);
2374 if (handle != INVALID_HANDLE_VALUE) {
2375 int new_fd = _open_osfhandle((intptr_t)handle, O_BINARY);
2376 SetStdHandle(std_id, handle);
2377 dup2(new_fd, fd);
2378 close(new_fd);
2379 }
2380}
2381static void maybe_redirect_std_handles(void)
2383{
2384 maybe_redirect_std_handle(L"GIT_REDIRECT_STDIN", STD_INPUT_HANDLE, 0,
2385 GENERIC_READ, FILE_ATTRIBUTE_NORMAL);
2386 maybe_redirect_std_handle(L"GIT_REDIRECT_STDOUT", STD_OUTPUT_HANDLE, 1,
2387 GENERIC_WRITE, FILE_ATTRIBUTE_NORMAL);
2388 maybe_redirect_std_handle(L"GIT_REDIRECT_STDERR", STD_ERROR_HANDLE, 2,
2389 GENERIC_WRITE, FILE_FLAG_NO_BUFFERING);
2390}
2391void mingw_startup(void)
2393{
2394 int i, maxlen, argc;
2395 char *buffer;
2396 wchar_t **wenv, **wargv;
2397 _startupinfo si;
2398 maybe_redirect_std_handles();
2400 /* get wide char arguments and environment */
2402 si.newmode = 0;
2403 if (__wgetmainargs(&argc, &wargv, &wenv, _CRT_glob, &si) < 0)
2404 die_startup();
2405 /* determine size of argv and environ conversion buffer */
2407 maxlen = wcslen(wargv[0]);
2408 for (i = 1; i < argc; i++)
2409 maxlen = max(maxlen, wcslen(wargv[i]));
2410 for (i = 0; wenv[i]; i++)
2411 maxlen = max(maxlen, wcslen(wenv[i]));
2412 /*
2414 * nedmalloc can't free CRT memory, allocate resizable environment
2415 * list. Note that xmalloc / xmemdupz etc. call getenv, so we cannot
2416 * use it while initializing the environment itself.
2417 */
2418 environ_size = i + 1;
2419 environ_alloc = alloc_nr(environ_size * sizeof(char*));
2420 environ = malloc_startup(environ_alloc);
2421 /* allocate buffer (wchar_t encodes to max 3 UTF-8 bytes) */
2423 maxlen = 3 * maxlen + 1;
2424 buffer = malloc_startup(maxlen);
2425 /* convert command line arguments and environment to UTF-8 */
2427 for (i = 0; i < argc; i++)
2428 __argv[i] = wcstoutfdup_startup(buffer, wargv[i], maxlen);
2429 for (i = 0; wenv[i]; i++)
2430 environ[i] = wcstoutfdup_startup(buffer, wenv[i], maxlen);
2431 environ[i] = NULL;
2432 free(buffer);
2433 /* sort environment for O(log n) getenv / putenv */
2435 qsort(environ, i, sizeof(char*), compareenv);
2436 /* fix Windows specific environment settings */
2438 setup_windows_environment();
2439 /* initialize critical section for waitpid pinfo_t list */
2441 InitializeCriticalSection(&pinfo_cs);
2442 /* set up default file mode and file modes for stdin/out/err */
2444 _fmode = _O_BINARY;
2445 _setmode(_fileno(stdin), _O_BINARY);
2446 _setmode(_fileno(stdout), _O_BINARY);
2447 _setmode(_fileno(stderr), _O_BINARY);
2448 /* initialize Unicode console */
2450 winansi_init();
2451}
2452int uname(struct utsname *buf)
2454{
2455 unsigned v = (unsigned)GetVersion();
2456 memset(buf, 0, sizeof(*buf));
2457 xsnprintf(buf->sysname, sizeof(buf->sysname), "Windows");
2458 xsnprintf(buf->release, sizeof(buf->release),
2459 "%u.%u", v & 0xff, (v >> 8) & 0xff);
2460 /* assuming NT variants only.. */
2461 xsnprintf(buf->version, sizeof(buf->version),
2462 "%u", (v >> 16) & 0x7fff);
2463 return 0;
2464}