c749a0259d3651dec6d85a6832cad297ef6aeb1d
1#include "../git-compat-util.h"
2#include "win32.h"
3#include <conio.h>
4#include "../strbuf.h"
5#include "../run-command.h"
6
7static const int delay[] = { 0, 1, 10, 20, 40 };
8
9int err_win_to_posix(DWORD winerr)
10{
11 int error = ENOSYS;
12 switch(winerr) {
13 case ERROR_ACCESS_DENIED: error = EACCES; break;
14 case ERROR_ACCOUNT_DISABLED: error = EACCES; break;
15 case ERROR_ACCOUNT_RESTRICTION: error = EACCES; break;
16 case ERROR_ALREADY_ASSIGNED: error = EBUSY; break;
17 case ERROR_ALREADY_EXISTS: error = EEXIST; break;
18 case ERROR_ARITHMETIC_OVERFLOW: error = ERANGE; break;
19 case ERROR_BAD_COMMAND: error = EIO; break;
20 case ERROR_BAD_DEVICE: error = ENODEV; break;
21 case ERROR_BAD_DRIVER_LEVEL: error = ENXIO; break;
22 case ERROR_BAD_EXE_FORMAT: error = ENOEXEC; break;
23 case ERROR_BAD_FORMAT: error = ENOEXEC; break;
24 case ERROR_BAD_LENGTH: error = EINVAL; break;
25 case ERROR_BAD_PATHNAME: error = ENOENT; break;
26 case ERROR_BAD_PIPE: error = EPIPE; break;
27 case ERROR_BAD_UNIT: error = ENODEV; break;
28 case ERROR_BAD_USERNAME: error = EINVAL; break;
29 case ERROR_BROKEN_PIPE: error = EPIPE; break;
30 case ERROR_BUFFER_OVERFLOW: error = ENAMETOOLONG; break;
31 case ERROR_BUSY: error = EBUSY; break;
32 case ERROR_BUSY_DRIVE: error = EBUSY; break;
33 case ERROR_CALL_NOT_IMPLEMENTED: error = ENOSYS; break;
34 case ERROR_CANNOT_MAKE: error = EACCES; break;
35 case ERROR_CANTOPEN: error = EIO; break;
36 case ERROR_CANTREAD: error = EIO; break;
37 case ERROR_CANTWRITE: error = EIO; break;
38 case ERROR_CRC: error = EIO; break;
39 case ERROR_CURRENT_DIRECTORY: error = EACCES; break;
40 case ERROR_DEVICE_IN_USE: error = EBUSY; break;
41 case ERROR_DEV_NOT_EXIST: error = ENODEV; break;
42 case ERROR_DIRECTORY: error = EINVAL; break;
43 case ERROR_DIR_NOT_EMPTY: error = ENOTEMPTY; break;
44 case ERROR_DISK_CHANGE: error = EIO; break;
45 case ERROR_DISK_FULL: error = ENOSPC; break;
46 case ERROR_DRIVE_LOCKED: error = EBUSY; break;
47 case ERROR_ENVVAR_NOT_FOUND: error = EINVAL; break;
48 case ERROR_EXE_MARKED_INVALID: error = ENOEXEC; break;
49 case ERROR_FILENAME_EXCED_RANGE: error = ENAMETOOLONG; break;
50 case ERROR_FILE_EXISTS: error = EEXIST; break;
51 case ERROR_FILE_INVALID: error = ENODEV; break;
52 case ERROR_FILE_NOT_FOUND: error = ENOENT; break;
53 case ERROR_GEN_FAILURE: error = EIO; break;
54 case ERROR_HANDLE_DISK_FULL: error = ENOSPC; break;
55 case ERROR_INSUFFICIENT_BUFFER: error = ENOMEM; break;
56 case ERROR_INVALID_ACCESS: error = EACCES; break;
57 case ERROR_INVALID_ADDRESS: error = EFAULT; break;
58 case ERROR_INVALID_BLOCK: error = EFAULT; break;
59 case ERROR_INVALID_DATA: error = EINVAL; break;
60 case ERROR_INVALID_DRIVE: error = ENODEV; break;
61 case ERROR_INVALID_EXE_SIGNATURE: error = ENOEXEC; break;
62 case ERROR_INVALID_FLAGS: error = EINVAL; break;
63 case ERROR_INVALID_FUNCTION: error = ENOSYS; break;
64 case ERROR_INVALID_HANDLE: error = EBADF; break;
65 case ERROR_INVALID_LOGON_HOURS: error = EACCES; break;
66 case ERROR_INVALID_NAME: error = EINVAL; break;
67 case ERROR_INVALID_OWNER: error = EINVAL; break;
68 case ERROR_INVALID_PARAMETER: error = EINVAL; break;
69 case ERROR_INVALID_PASSWORD: error = EPERM; break;
70 case ERROR_INVALID_PRIMARY_GROUP: error = EINVAL; break;
71 case ERROR_INVALID_SIGNAL_NUMBER: error = EINVAL; break;
72 case ERROR_INVALID_TARGET_HANDLE: error = EIO; break;
73 case ERROR_INVALID_WORKSTATION: error = EACCES; break;
74 case ERROR_IO_DEVICE: error = EIO; break;
75 case ERROR_IO_INCOMPLETE: error = EINTR; break;
76 case ERROR_LOCKED: error = EBUSY; break;
77 case ERROR_LOCK_VIOLATION: error = EACCES; break;
78 case ERROR_LOGON_FAILURE: error = EACCES; break;
79 case ERROR_MAPPED_ALIGNMENT: error = EINVAL; break;
80 case ERROR_META_EXPANSION_TOO_LONG: error = E2BIG; break;
81 case ERROR_MORE_DATA: error = EPIPE; break;
82 case ERROR_NEGATIVE_SEEK: error = ESPIPE; break;
83 case ERROR_NOACCESS: error = EFAULT; break;
84 case ERROR_NONE_MAPPED: error = EINVAL; break;
85 case ERROR_NOT_ENOUGH_MEMORY: error = ENOMEM; break;
86 case ERROR_NOT_READY: error = EAGAIN; break;
87 case ERROR_NOT_SAME_DEVICE: error = EXDEV; break;
88 case ERROR_NO_DATA: error = EPIPE; break;
89 case ERROR_NO_MORE_SEARCH_HANDLES: error = EIO; break;
90 case ERROR_NO_PROC_SLOTS: error = EAGAIN; break;
91 case ERROR_NO_SUCH_PRIVILEGE: error = EACCES; break;
92 case ERROR_OPEN_FAILED: error = EIO; break;
93 case ERROR_OPEN_FILES: error = EBUSY; break;
94 case ERROR_OPERATION_ABORTED: error = EINTR; break;
95 case ERROR_OUTOFMEMORY: error = ENOMEM; break;
96 case ERROR_PASSWORD_EXPIRED: error = EACCES; break;
97 case ERROR_PATH_BUSY: error = EBUSY; break;
98 case ERROR_PATH_NOT_FOUND: error = ENOENT; break;
99 case ERROR_PIPE_BUSY: error = EBUSY; break;
100 case ERROR_PIPE_CONNECTED: error = EPIPE; break;
101 case ERROR_PIPE_LISTENING: error = EPIPE; break;
102 case ERROR_PIPE_NOT_CONNECTED: error = EPIPE; break;
103 case ERROR_PRIVILEGE_NOT_HELD: error = EACCES; break;
104 case ERROR_READ_FAULT: error = EIO; break;
105 case ERROR_SEEK: error = EIO; break;
106 case ERROR_SEEK_ON_DEVICE: error = ESPIPE; break;
107 case ERROR_SHARING_BUFFER_EXCEEDED: error = ENFILE; break;
108 case ERROR_SHARING_VIOLATION: error = EACCES; break;
109 case ERROR_STACK_OVERFLOW: error = ENOMEM; break;
110 case ERROR_SWAPERROR: error = ENOENT; break;
111 case ERROR_TOO_MANY_MODULES: error = EMFILE; break;
112 case ERROR_TOO_MANY_OPEN_FILES: error = EMFILE; break;
113 case ERROR_UNRECOGNIZED_MEDIA: error = ENXIO; break;
114 case ERROR_UNRECOGNIZED_VOLUME: error = ENODEV; break;
115 case ERROR_WAIT_NO_CHILDREN: error = ECHILD; break;
116 case ERROR_WRITE_FAULT: error = EIO; break;
117 case ERROR_WRITE_PROTECT: error = EROFS; break;
118 }
119 return error;
120}
121
122static inline int is_file_in_use_error(DWORD errcode)
123{
124 switch (errcode) {
125 case ERROR_SHARING_VIOLATION:
126 case ERROR_ACCESS_DENIED:
127 return 1;
128 }
129
130 return 0;
131}
132
133static int read_yes_no_answer(void)
134{
135 char answer[1024];
136
137 if (fgets(answer, sizeof(answer), stdin)) {
138 size_t answer_len = strlen(answer);
139 int got_full_line = 0, c;
140
141 /* remove the newline */
142 if (answer_len >= 2 && answer[answer_len-2] == '\r') {
143 answer[answer_len-2] = '\0';
144 got_full_line = 1;
145 } else if (answer_len >= 1 && answer[answer_len-1] == '\n') {
146 answer[answer_len-1] = '\0';
147 got_full_line = 1;
148 }
149 /* flush the buffer in case we did not get the full line */
150 if (!got_full_line)
151 while ((c = getchar()) != EOF && c != '\n')
152 ;
153 } else
154 /* we could not read, return the
155 * default answer which is no */
156 return 0;
157
158 if (tolower(answer[0]) == 'y' && !answer[1])
159 return 1;
160 if (!strncasecmp(answer, "yes", sizeof(answer)))
161 return 1;
162 if (tolower(answer[0]) == 'n' && !answer[1])
163 return 0;
164 if (!strncasecmp(answer, "no", sizeof(answer)))
165 return 0;
166
167 /* did not find an answer we understand */
168 return -1;
169}
170
171static int ask_yes_no_if_possible(const char *format, ...)
172{
173 char question[4096];
174 const char *retry_hook[] = { NULL, NULL, NULL };
175 va_list args;
176
177 va_start(args, format);
178 vsnprintf(question, sizeof(question), format, args);
179 va_end(args);
180
181 if ((retry_hook[0] = mingw_getenv("GIT_ASK_YESNO"))) {
182 retry_hook[1] = question;
183 return !run_command_v_opt(retry_hook, 0);
184 }
185
186 if (!isatty(_fileno(stdin)) || !isatty(_fileno(stderr)))
187 return 0;
188
189 while (1) {
190 int answer;
191 fprintf(stderr, "%s (y/n) ", question);
192
193 if ((answer = read_yes_no_answer()) >= 0)
194 return answer;
195
196 fprintf(stderr, "Sorry, I did not understand your answer. "
197 "Please type 'y' or 'n'\n");
198 }
199}
200
201#undef unlink
202int mingw_unlink(const char *pathname)
203{
204 int ret, tries = 0;
205
206 /* read-only files cannot be removed */
207 chmod(pathname, 0666);
208 while ((ret = unlink(pathname)) == -1 && tries < ARRAY_SIZE(delay)) {
209 if (!is_file_in_use_error(GetLastError()))
210 break;
211 /*
212 * We assume that some other process had the source or
213 * destination file open at the wrong moment and retry.
214 * In order to give the other process a higher chance to
215 * complete its operation, we give up our time slice now.
216 * If we have to retry again, we do sleep a bit.
217 */
218 Sleep(delay[tries]);
219 tries++;
220 }
221 while (ret == -1 && is_file_in_use_error(GetLastError()) &&
222 ask_yes_no_if_possible("Unlink of file '%s' failed. "
223 "Should I try again?", pathname))
224 ret = unlink(pathname);
225 return ret;
226}
227
228static int is_dir_empty(const char *path)
229{
230 struct strbuf buf = STRBUF_INIT;
231 WIN32_FIND_DATAA findbuf;
232 HANDLE handle;
233
234 strbuf_addf(&buf, "%s\\*", path);
235 handle = FindFirstFileA(buf.buf, &findbuf);
236 if (handle == INVALID_HANDLE_VALUE) {
237 strbuf_release(&buf);
238 return GetLastError() == ERROR_NO_MORE_FILES;
239 }
240
241 while (!strcmp(findbuf.cFileName, ".") ||
242 !strcmp(findbuf.cFileName, ".."))
243 if (!FindNextFile(handle, &findbuf)) {
244 strbuf_release(&buf);
245 return GetLastError() == ERROR_NO_MORE_FILES;
246 }
247 FindClose(handle);
248 strbuf_release(&buf);
249 return 0;
250}
251
252#undef rmdir
253int mingw_rmdir(const char *pathname)
254{
255 int ret, tries = 0;
256
257 while ((ret = rmdir(pathname)) == -1 && tries < ARRAY_SIZE(delay)) {
258 if (!is_file_in_use_error(GetLastError()))
259 break;
260 if (!is_dir_empty(pathname)) {
261 errno = ENOTEMPTY;
262 break;
263 }
264 /*
265 * We assume that some other process had the source or
266 * destination file open at the wrong moment and retry.
267 * In order to give the other process a higher chance to
268 * complete its operation, we give up our time slice now.
269 * If we have to retry again, we do sleep a bit.
270 */
271 Sleep(delay[tries]);
272 tries++;
273 }
274 while (ret == -1 && is_file_in_use_error(GetLastError()) &&
275 ask_yes_no_if_possible("Deletion of directory '%s' failed. "
276 "Should I try again?", pathname))
277 ret = rmdir(pathname);
278 return ret;
279}
280
281#undef open
282int mingw_open (const char *filename, int oflags, ...)
283{
284 va_list args;
285 unsigned mode;
286 int fd;
287
288 va_start(args, oflags);
289 mode = va_arg(args, int);
290 va_end(args);
291
292 if (filename && !strcmp(filename, "/dev/null"))
293 filename = "nul";
294
295 fd = open(filename, oflags, mode);
296
297 if (fd < 0 && (oflags & O_CREAT) && errno == EACCES) {
298 DWORD attrs = GetFileAttributes(filename);
299 if (attrs != INVALID_FILE_ATTRIBUTES && (attrs & FILE_ATTRIBUTE_DIRECTORY))
300 errno = EISDIR;
301 }
302 return fd;
303}
304
305#undef write
306ssize_t mingw_write(int fd, const void *buf, size_t count)
307{
308 /*
309 * While write() calls to a file on a local disk are translated
310 * into WriteFile() calls with a maximum size of 64KB on Windows
311 * XP and 256KB on Vista, no such cap is placed on writes to
312 * files over the network on Windows XP. Unfortunately, there
313 * seems to be a limit of 32MB-28KB on X64 and 64MB-32KB on x86;
314 * bigger writes fail on Windows XP.
315 * So we cap to a nice 31MB here to avoid write failures over
316 * the net without changing the number of WriteFile() calls in
317 * the local case.
318 */
319 return write(fd, buf, min(count, 31 * 1024 * 1024));
320}
321
322static BOOL WINAPI ctrl_ignore(DWORD type)
323{
324 return TRUE;
325}
326
327#undef fgetc
328int mingw_fgetc(FILE *stream)
329{
330 int ch;
331 if (!isatty(_fileno(stream)))
332 return fgetc(stream);
333
334 SetConsoleCtrlHandler(ctrl_ignore, TRUE);
335 while (1) {
336 ch = fgetc(stream);
337 if (ch != EOF || GetLastError() != ERROR_OPERATION_ABORTED)
338 break;
339
340 /* Ctrl+C was pressed, simulate SIGINT and retry */
341 mingw_raise(SIGINT);
342 }
343 SetConsoleCtrlHandler(ctrl_ignore, FALSE);
344 return ch;
345}
346
347#undef fopen
348FILE *mingw_fopen (const char *filename, const char *otype)
349{
350 if (filename && !strcmp(filename, "/dev/null"))
351 filename = "nul";
352 return fopen(filename, otype);
353}
354
355#undef freopen
356FILE *mingw_freopen (const char *filename, const char *otype, FILE *stream)
357{
358 if (filename && !strcmp(filename, "/dev/null"))
359 filename = "nul";
360 return freopen(filename, otype, stream);
361}
362
363#undef fflush
364int mingw_fflush(FILE *stream)
365{
366 int ret = fflush(stream);
367
368 /*
369 * write() is used behind the scenes of stdio output functions.
370 * Since git code does not check for errors after each stdio write
371 * operation, it can happen that write() is called by a later
372 * stdio function even if an earlier write() call failed. In the
373 * case of a pipe whose readable end was closed, only the first
374 * call to write() reports EPIPE on Windows. Subsequent write()
375 * calls report EINVAL. It is impossible to notice whether this
376 * fflush invocation triggered such a case, therefore, we have to
377 * catch all EINVAL errors whole-sale.
378 */
379 if (ret && errno == EINVAL)
380 errno = EPIPE;
381
382 return ret;
383}
384
385/*
386 * The unit of FILETIME is 100-nanoseconds since January 1, 1601, UTC.
387 * Returns the 100-nanoseconds ("hekto nanoseconds") since the epoch.
388 */
389static inline long long filetime_to_hnsec(const FILETIME *ft)
390{
391 long long winTime = ((long long)ft->dwHighDateTime << 32) + ft->dwLowDateTime;
392 /* Windows to Unix Epoch conversion */
393 return winTime - 116444736000000000LL;
394}
395
396static inline time_t filetime_to_time_t(const FILETIME *ft)
397{
398 return (time_t)(filetime_to_hnsec(ft) / 10000000);
399}
400
401/* We keep the do_lstat code in a separate function to avoid recursion.
402 * When a path ends with a slash, the stat will fail with ENOENT. In
403 * this case, we strip the trailing slashes and stat again.
404 *
405 * If follow is true then act like stat() and report on the link
406 * target. Otherwise report on the link itself.
407 */
408static int do_lstat(int follow, const char *file_name, struct stat *buf)
409{
410 int err;
411 WIN32_FILE_ATTRIBUTE_DATA fdata;
412
413 if (!(err = get_file_attr(file_name, &fdata))) {
414 buf->st_ino = 0;
415 buf->st_gid = 0;
416 buf->st_uid = 0;
417 buf->st_nlink = 1;
418 buf->st_mode = file_attr_to_st_mode(fdata.dwFileAttributes);
419 buf->st_size = fdata.nFileSizeLow |
420 (((off_t)fdata.nFileSizeHigh)<<32);
421 buf->st_dev = buf->st_rdev = 0; /* not used by Git */
422 buf->st_atime = filetime_to_time_t(&(fdata.ftLastAccessTime));
423 buf->st_mtime = filetime_to_time_t(&(fdata.ftLastWriteTime));
424 buf->st_ctime = filetime_to_time_t(&(fdata.ftCreationTime));
425 if (fdata.dwFileAttributes & FILE_ATTRIBUTE_REPARSE_POINT) {
426 WIN32_FIND_DATAA findbuf;
427 HANDLE handle = FindFirstFileA(file_name, &findbuf);
428 if (handle != INVALID_HANDLE_VALUE) {
429 if ((findbuf.dwFileAttributes & FILE_ATTRIBUTE_REPARSE_POINT) &&
430 (findbuf.dwReserved0 == IO_REPARSE_TAG_SYMLINK)) {
431 if (follow) {
432 char buffer[MAXIMUM_REPARSE_DATA_BUFFER_SIZE];
433 buf->st_size = readlink(file_name, buffer, MAXIMUM_REPARSE_DATA_BUFFER_SIZE);
434 } else {
435 buf->st_mode = S_IFLNK;
436 }
437 buf->st_mode |= S_IREAD;
438 if (!(findbuf.dwFileAttributes & FILE_ATTRIBUTE_READONLY))
439 buf->st_mode |= S_IWRITE;
440 }
441 FindClose(handle);
442 }
443 }
444 return 0;
445 }
446 errno = err;
447 return -1;
448}
449
450/* We provide our own lstat/fstat functions, since the provided
451 * lstat/fstat functions are so slow. These stat functions are
452 * tailored for Git's usage (read: fast), and are not meant to be
453 * complete. Note that Git stat()s are redirected to mingw_lstat()
454 * too, since Windows doesn't really handle symlinks that well.
455 */
456static int do_stat_internal(int follow, const char *file_name, struct stat *buf)
457{
458 int namelen;
459 static char alt_name[PATH_MAX];
460
461 if (!do_lstat(follow, file_name, buf))
462 return 0;
463
464 /* if file_name ended in a '/', Windows returned ENOENT;
465 * try again without trailing slashes
466 */
467 if (errno != ENOENT)
468 return -1;
469
470 namelen = strlen(file_name);
471 if (namelen && file_name[namelen-1] != '/')
472 return -1;
473 while (namelen && file_name[namelen-1] == '/')
474 --namelen;
475 if (!namelen || namelen >= PATH_MAX)
476 return -1;
477
478 memcpy(alt_name, file_name, namelen);
479 alt_name[namelen] = 0;
480 return do_lstat(follow, alt_name, buf);
481}
482
483int mingw_lstat(const char *file_name, struct stat *buf)
484{
485 return do_stat_internal(0, file_name, buf);
486}
487int mingw_stat(const char *file_name, struct stat *buf)
488{
489 return do_stat_internal(1, file_name, buf);
490}
491
492#undef fstat
493int mingw_fstat(int fd, struct stat *buf)
494{
495 HANDLE fh = (HANDLE)_get_osfhandle(fd);
496 BY_HANDLE_FILE_INFORMATION fdata;
497
498 if (fh == INVALID_HANDLE_VALUE) {
499 errno = EBADF;
500 return -1;
501 }
502 /* direct non-file handles to MS's fstat() */
503 if (GetFileType(fh) != FILE_TYPE_DISK)
504 return _fstati64(fd, buf);
505
506 if (GetFileInformationByHandle(fh, &fdata)) {
507 buf->st_ino = 0;
508 buf->st_gid = 0;
509 buf->st_uid = 0;
510 buf->st_nlink = 1;
511 buf->st_mode = file_attr_to_st_mode(fdata.dwFileAttributes);
512 buf->st_size = fdata.nFileSizeLow |
513 (((off_t)fdata.nFileSizeHigh)<<32);
514 buf->st_dev = buf->st_rdev = 0; /* not used by Git */
515 buf->st_atime = filetime_to_time_t(&(fdata.ftLastAccessTime));
516 buf->st_mtime = filetime_to_time_t(&(fdata.ftLastWriteTime));
517 buf->st_ctime = filetime_to_time_t(&(fdata.ftCreationTime));
518 return 0;
519 }
520 errno = EBADF;
521 return -1;
522}
523
524static inline void time_t_to_filetime(time_t t, FILETIME *ft)
525{
526 long long winTime = t * 10000000LL + 116444736000000000LL;
527 ft->dwLowDateTime = winTime;
528 ft->dwHighDateTime = winTime >> 32;
529}
530
531int mingw_utime (const char *file_name, const struct utimbuf *times)
532{
533 FILETIME mft, aft;
534 int fh, rc;
535
536 /* must have write permission */
537 DWORD attrs = GetFileAttributes(file_name);
538 if (attrs != INVALID_FILE_ATTRIBUTES &&
539 (attrs & FILE_ATTRIBUTE_READONLY)) {
540 /* ignore errors here; open() will report them */
541 SetFileAttributes(file_name, attrs & ~FILE_ATTRIBUTE_READONLY);
542 }
543
544 if ((fh = open(file_name, O_RDWR | O_BINARY)) < 0) {
545 rc = -1;
546 goto revert_attrs;
547 }
548
549 if (times) {
550 time_t_to_filetime(times->modtime, &mft);
551 time_t_to_filetime(times->actime, &aft);
552 } else {
553 GetSystemTimeAsFileTime(&mft);
554 aft = mft;
555 }
556 if (!SetFileTime((HANDLE)_get_osfhandle(fh), NULL, &aft, &mft)) {
557 errno = EINVAL;
558 rc = -1;
559 } else
560 rc = 0;
561 close(fh);
562
563revert_attrs:
564 if (attrs != INVALID_FILE_ATTRIBUTES &&
565 (attrs & FILE_ATTRIBUTE_READONLY)) {
566 /* ignore errors again */
567 SetFileAttributes(file_name, attrs);
568 }
569 return rc;
570}
571
572unsigned int sleep (unsigned int seconds)
573{
574 Sleep(seconds*1000);
575 return 0;
576}
577
578int mkstemp(char *template)
579{
580 char *filename = mktemp(template);
581 if (filename == NULL)
582 return -1;
583 return open(filename, O_RDWR | O_CREAT, 0600);
584}
585
586int gettimeofday(struct timeval *tv, void *tz)
587{
588 FILETIME ft;
589 long long hnsec;
590
591 GetSystemTimeAsFileTime(&ft);
592 hnsec = filetime_to_hnsec(&ft);
593 tv->tv_sec = hnsec / 10000000;
594 tv->tv_usec = (hnsec % 10000000) / 10;
595 return 0;
596}
597
598int pipe(int filedes[2])
599{
600 HANDLE h[2];
601
602 /* this creates non-inheritable handles */
603 if (!CreatePipe(&h[0], &h[1], NULL, 8192)) {
604 errno = err_win_to_posix(GetLastError());
605 return -1;
606 }
607 filedes[0] = _open_osfhandle((int)h[0], O_NOINHERIT);
608 if (filedes[0] < 0) {
609 CloseHandle(h[0]);
610 CloseHandle(h[1]);
611 return -1;
612 }
613 filedes[1] = _open_osfhandle((int)h[1], O_NOINHERIT);
614 if (filedes[0] < 0) {
615 close(filedes[0]);
616 CloseHandle(h[1]);
617 return -1;
618 }
619 return 0;
620}
621
622struct tm *gmtime_r(const time_t *timep, struct tm *result)
623{
624 /* gmtime() in MSVCRT.DLL is thread-safe, but not reentrant */
625 memcpy(result, gmtime(timep), sizeof(struct tm));
626 return result;
627}
628
629struct tm *localtime_r(const time_t *timep, struct tm *result)
630{
631 /* localtime() in MSVCRT.DLL is thread-safe, but not reentrant */
632 memcpy(result, localtime(timep), sizeof(struct tm));
633 return result;
634}
635
636#undef getcwd
637char *mingw_getcwd(char *pointer, int len)
638{
639 int i;
640 char *ret = getcwd(pointer, len);
641 if (!ret)
642 return ret;
643 for (i = 0; pointer[i]; i++)
644 if (pointer[i] == '\\')
645 pointer[i] = '/';
646 return ret;
647}
648
649/*
650 * See http://msdn2.microsoft.com/en-us/library/17w5ykft(vs.71).aspx
651 * (Parsing C++ Command-Line Arguments)
652 */
653static const char *quote_arg(const char *arg)
654{
655 /* count chars to quote */
656 int len = 0, n = 0;
657 int force_quotes = 0;
658 char *q, *d;
659 const char *p = arg;
660 if (!*p) force_quotes = 1;
661 while (*p) {
662 if (isspace(*p) || *p == '*' || *p == '?' || *p == '{' || *p == '\'')
663 force_quotes = 1;
664 else if (*p == '"')
665 n++;
666 else if (*p == '\\') {
667 int count = 0;
668 while (*p == '\\') {
669 count++;
670 p++;
671 len++;
672 }
673 if (*p == '"')
674 n += count*2 + 1;
675 continue;
676 }
677 len++;
678 p++;
679 }
680 if (!force_quotes && n == 0)
681 return arg;
682
683 /* insert \ where necessary */
684 d = q = xmalloc(len+n+3);
685 *d++ = '"';
686 while (*arg) {
687 if (*arg == '"')
688 *d++ = '\\';
689 else if (*arg == '\\') {
690 int count = 0;
691 while (*arg == '\\') {
692 count++;
693 *d++ = *arg++;
694 }
695 if (*arg == '"') {
696 while (count-- > 0)
697 *d++ = '\\';
698 *d++ = '\\';
699 }
700 }
701 *d++ = *arg++;
702 }
703 *d++ = '"';
704 *d++ = 0;
705 return q;
706}
707
708static const char *parse_interpreter(const char *cmd)
709{
710 static char buf[100];
711 char *p, *opt;
712 int n, fd;
713
714 /* don't even try a .exe */
715 n = strlen(cmd);
716 if (n >= 4 && !strcasecmp(cmd+n-4, ".exe"))
717 return NULL;
718
719 fd = open(cmd, O_RDONLY);
720 if (fd < 0)
721 return NULL;
722 n = read(fd, buf, sizeof(buf)-1);
723 close(fd);
724 if (n < 4) /* at least '#!/x' and not error */
725 return NULL;
726
727 if (buf[0] != '#' || buf[1] != '!')
728 return NULL;
729 buf[n] = '\0';
730 p = buf + strcspn(buf, "\r\n");
731 if (!*p)
732 return NULL;
733
734 *p = '\0';
735 if (!(p = strrchr(buf+2, '/')) && !(p = strrchr(buf+2, '\\')))
736 return NULL;
737 /* strip options */
738 if ((opt = strchr(p+1, ' ')))
739 *opt = '\0';
740 return p+1;
741}
742
743/*
744 * Splits the PATH into parts.
745 */
746static char **get_path_split(void)
747{
748 char *p, **path, *envpath = mingw_getenv("PATH");
749 int i, n = 0;
750
751 if (!envpath || !*envpath)
752 return NULL;
753
754 envpath = xstrdup(envpath);
755 p = envpath;
756 while (p) {
757 char *dir = p;
758 p = strchr(p, ';');
759 if (p) *p++ = '\0';
760 if (*dir) { /* not earlier, catches series of ; */
761 ++n;
762 }
763 }
764 if (!n)
765 return NULL;
766
767 path = xmalloc((n+1)*sizeof(char *));
768 p = envpath;
769 i = 0;
770 do {
771 if (*p)
772 path[i++] = xstrdup(p);
773 p = p+strlen(p)+1;
774 } while (i < n);
775 path[i] = NULL;
776
777 free(envpath);
778
779 return path;
780}
781
782static void free_path_split(char **path)
783{
784 char **p = path;
785
786 if (!path)
787 return;
788
789 while (*p)
790 free(*p++);
791 free(path);
792}
793
794/*
795 * exe_only means that we only want to detect .exe files, but not scripts
796 * (which do not have an extension)
797 */
798static char *lookup_prog(const char *dir, const char *cmd, int isexe, int exe_only)
799{
800 char path[MAX_PATH];
801 snprintf(path, sizeof(path), "%s/%s.exe", dir, cmd);
802
803 if (!isexe && access(path, F_OK) == 0)
804 return xstrdup(path);
805 path[strlen(path)-4] = '\0';
806 if ((!exe_only || isexe) && access(path, F_OK) == 0)
807 if (!(GetFileAttributes(path) & FILE_ATTRIBUTE_DIRECTORY))
808 return xstrdup(path);
809 return NULL;
810}
811
812/*
813 * Determines the absolute path of cmd using the split path in path.
814 * If cmd contains a slash or backslash, no lookup is performed.
815 */
816static char *path_lookup(const char *cmd, char **path, int exe_only)
817{
818 char *prog = NULL;
819 int len = strlen(cmd);
820 int isexe = len >= 4 && !strcasecmp(cmd+len-4, ".exe");
821
822 if (strchr(cmd, '/') || strchr(cmd, '\\'))
823 prog = xstrdup(cmd);
824
825 while (!prog && *path)
826 prog = lookup_prog(*path++, cmd, isexe, exe_only);
827
828 return prog;
829}
830
831static int env_compare(const void *a, const void *b)
832{
833 char *const *ea = a;
834 char *const *eb = b;
835 return strcasecmp(*ea, *eb);
836}
837
838struct pinfo_t {
839 struct pinfo_t *next;
840 pid_t pid;
841 HANDLE proc;
842} pinfo_t;
843struct pinfo_t *pinfo = NULL;
844CRITICAL_SECTION pinfo_cs;
845
846static pid_t mingw_spawnve_fd(const char *cmd, const char **argv, char **env,
847 const char *dir,
848 int prepend_cmd, int fhin, int fhout, int fherr)
849{
850 STARTUPINFO si;
851 PROCESS_INFORMATION pi;
852 struct strbuf envblk, args;
853 unsigned flags;
854 BOOL ret;
855
856 /* Determine whether or not we are associated to a console */
857 HANDLE cons = CreateFile("CONOUT$", GENERIC_WRITE,
858 FILE_SHARE_WRITE, NULL, OPEN_EXISTING,
859 FILE_ATTRIBUTE_NORMAL, NULL);
860 if (cons == INVALID_HANDLE_VALUE) {
861 /* There is no console associated with this process.
862 * Since the child is a console process, Windows
863 * would normally create a console window. But
864 * since we'll be redirecting std streams, we do
865 * not need the console.
866 * It is necessary to use DETACHED_PROCESS
867 * instead of CREATE_NO_WINDOW to make ssh
868 * recognize that it has no console.
869 */
870 flags = DETACHED_PROCESS;
871 } else {
872 /* There is already a console. If we specified
873 * DETACHED_PROCESS here, too, Windows would
874 * disassociate the child from the console.
875 * The same is true for CREATE_NO_WINDOW.
876 * Go figure!
877 */
878 flags = 0;
879 CloseHandle(cons);
880 }
881 memset(&si, 0, sizeof(si));
882 si.cb = sizeof(si);
883 si.dwFlags = STARTF_USESTDHANDLES;
884 si.hStdInput = (HANDLE) _get_osfhandle(fhin);
885 si.hStdOutput = (HANDLE) _get_osfhandle(fhout);
886 si.hStdError = (HANDLE) _get_osfhandle(fherr);
887
888 /* concatenate argv, quoting args as we go */
889 strbuf_init(&args, 0);
890 if (prepend_cmd) {
891 char *quoted = (char *)quote_arg(cmd);
892 strbuf_addstr(&args, quoted);
893 if (quoted != cmd)
894 free(quoted);
895 }
896 for (; *argv; argv++) {
897 char *quoted = (char *)quote_arg(*argv);
898 if (*args.buf)
899 strbuf_addch(&args, ' ');
900 strbuf_addstr(&args, quoted);
901 if (quoted != *argv)
902 free(quoted);
903 }
904
905 if (env) {
906 int count = 0;
907 char **e, **sorted_env;
908
909 for (e = env; *e; e++)
910 count++;
911
912 /* environment must be sorted */
913 sorted_env = xmalloc(sizeof(*sorted_env) * (count + 1));
914 memcpy(sorted_env, env, sizeof(*sorted_env) * (count + 1));
915 qsort(sorted_env, count, sizeof(*sorted_env), env_compare);
916
917 strbuf_init(&envblk, 0);
918 for (e = sorted_env; *e; e++) {
919 strbuf_addstr(&envblk, *e);
920 strbuf_addch(&envblk, '\0');
921 }
922 free(sorted_env);
923 }
924
925 memset(&pi, 0, sizeof(pi));
926 ret = CreateProcess(cmd, args.buf, NULL, NULL, TRUE, flags,
927 env ? envblk.buf : NULL, dir, &si, &pi);
928
929 if (env)
930 strbuf_release(&envblk);
931 strbuf_release(&args);
932
933 if (!ret) {
934 errno = ENOENT;
935 return -1;
936 }
937 CloseHandle(pi.hThread);
938
939 /*
940 * The process ID is the human-readable identifier of the process
941 * that we want to present in log and error messages. The handle
942 * is not useful for this purpose. But we cannot close it, either,
943 * because it is not possible to turn a process ID into a process
944 * handle after the process terminated.
945 * Keep the handle in a list for waitpid.
946 */
947 EnterCriticalSection(&pinfo_cs);
948 {
949 struct pinfo_t *info = xmalloc(sizeof(struct pinfo_t));
950 info->pid = pi.dwProcessId;
951 info->proc = pi.hProcess;
952 info->next = pinfo;
953 pinfo = info;
954 }
955 LeaveCriticalSection(&pinfo_cs);
956
957 return (pid_t)pi.dwProcessId;
958}
959
960static pid_t mingw_spawnve(const char *cmd, const char **argv, char **env,
961 int prepend_cmd)
962{
963 return mingw_spawnve_fd(cmd, argv, env, NULL, prepend_cmd, 0, 1, 2);
964}
965
966pid_t mingw_spawnvpe(const char *cmd, const char **argv, char **env,
967 const char *dir,
968 int fhin, int fhout, int fherr)
969{
970 pid_t pid;
971 char **path = get_path_split();
972 char *prog = path_lookup(cmd, path, 0);
973
974 if (!prog) {
975 errno = ENOENT;
976 pid = -1;
977 }
978 else {
979 const char *interpr = parse_interpreter(prog);
980
981 if (interpr) {
982 const char *argv0 = argv[0];
983 char *iprog = path_lookup(interpr, path, 1);
984 argv[0] = prog;
985 if (!iprog) {
986 errno = ENOENT;
987 pid = -1;
988 }
989 else {
990 pid = mingw_spawnve_fd(iprog, argv, env, dir, 1,
991 fhin, fhout, fherr);
992 free(iprog);
993 }
994 argv[0] = argv0;
995 }
996 else
997 pid = mingw_spawnve_fd(prog, argv, env, dir, 0,
998 fhin, fhout, fherr);
999 free(prog);
1000 }
1001 free_path_split(path);
1002 return pid;
1003}
1004
1005static int try_shell_exec(const char *cmd, char *const *argv, char **env)
1006{
1007 const char *interpr = parse_interpreter(cmd);
1008 char **path;
1009 char *prog;
1010 int pid = 0;
1011
1012 if (!interpr)
1013 return 0;
1014 path = get_path_split();
1015 prog = path_lookup(interpr, path, 1);
1016 if (prog) {
1017 int argc = 0;
1018 const char **argv2;
1019 while (argv[argc]) argc++;
1020 argv2 = xmalloc(sizeof(*argv) * (argc+1));
1021 argv2[0] = (char *)cmd; /* full path to the script file */
1022 memcpy(&argv2[1], &argv[1], sizeof(*argv) * argc);
1023 pid = mingw_spawnve(prog, argv2, env, 1);
1024 if (pid >= 0) {
1025 int status;
1026 if (waitpid(pid, &status, 0) < 0)
1027 status = 255;
1028 exit(status);
1029 }
1030 pid = 1; /* indicate that we tried but failed */
1031 free(prog);
1032 free(argv2);
1033 }
1034 free_path_split(path);
1035 return pid;
1036}
1037
1038static void mingw_execve(const char *cmd, char *const *argv, char *const *env)
1039{
1040 /* check if git_command is a shell script */
1041 if (!try_shell_exec(cmd, argv, (char **)env)) {
1042 int pid, status;
1043
1044 pid = mingw_spawnve(cmd, (const char **)argv, (char **)env, 0);
1045 if (pid < 0)
1046 return;
1047 if (waitpid(pid, &status, 0) < 0)
1048 status = 255;
1049 exit(status);
1050 }
1051}
1052
1053int mingw_execvp(const char *cmd, char *const *argv)
1054{
1055 char **path = get_path_split();
1056 char *prog = path_lookup(cmd, path, 0);
1057
1058 if (prog) {
1059 mingw_execve(prog, argv, environ);
1060 free(prog);
1061 } else
1062 errno = ENOENT;
1063
1064 free_path_split(path);
1065 return -1;
1066}
1067
1068int mingw_execv(const char *cmd, char *const *argv)
1069{
1070 mingw_execve(cmd, argv, environ);
1071 return -1;
1072}
1073
1074int mingw_kill(pid_t pid, int sig)
1075{
1076 if (pid > 0 && sig == SIGTERM) {
1077 HANDLE h = OpenProcess(PROCESS_TERMINATE, FALSE, pid);
1078
1079 if (TerminateProcess(h, -1)) {
1080 CloseHandle(h);
1081 return 0;
1082 }
1083
1084 errno = err_win_to_posix(GetLastError());
1085 CloseHandle(h);
1086 return -1;
1087 }
1088
1089 errno = EINVAL;
1090 return -1;
1091}
1092
1093static char **copy_environ(void)
1094{
1095 char **env;
1096 int i = 0;
1097 while (environ[i])
1098 i++;
1099 env = xmalloc((i+1)*sizeof(*env));
1100 for (i = 0; environ[i]; i++)
1101 env[i] = xstrdup(environ[i]);
1102 env[i] = NULL;
1103 return env;
1104}
1105
1106void free_environ(char **env)
1107{
1108 int i;
1109 for (i = 0; env[i]; i++)
1110 free(env[i]);
1111 free(env);
1112}
1113
1114static int lookup_env(char **env, const char *name, size_t nmln)
1115{
1116 int i;
1117
1118 for (i = 0; env[i]; i++) {
1119 if (0 == strncmp(env[i], name, nmln)
1120 && '=' == env[i][nmln])
1121 /* matches */
1122 return i;
1123 }
1124 return -1;
1125}
1126
1127/*
1128 * If name contains '=', then sets the variable, otherwise it unsets it
1129 */
1130static char **env_setenv(char **env, const char *name)
1131{
1132 char *eq = strchrnul(name, '=');
1133 int i = lookup_env(env, name, eq-name);
1134
1135 if (i < 0) {
1136 if (*eq) {
1137 for (i = 0; env[i]; i++)
1138 ;
1139 env = xrealloc(env, (i+2)*sizeof(*env));
1140 env[i] = xstrdup(name);
1141 env[i+1] = NULL;
1142 }
1143 }
1144 else {
1145 free(env[i]);
1146 if (*eq)
1147 env[i] = xstrdup(name);
1148 else
1149 for (; env[i]; i++)
1150 env[i] = env[i+1];
1151 }
1152 return env;
1153}
1154
1155/*
1156 * Copies global environ and adjusts variables as specified by vars.
1157 */
1158char **make_augmented_environ(const char *const *vars)
1159{
1160 char **env = copy_environ();
1161
1162 while (*vars)
1163 env = env_setenv(env, *vars++);
1164 return env;
1165}
1166
1167#undef getenv
1168
1169/*
1170 * The system's getenv looks up the name in a case-insensitive manner.
1171 * This version tries a case-sensitive lookup and falls back to
1172 * case-insensitive if nothing was found. This is necessary because,
1173 * as a prominent example, CMD sets 'Path', but not 'PATH'.
1174 * Warning: not thread-safe.
1175 */
1176static char *getenv_cs(const char *name)
1177{
1178 size_t len = strlen(name);
1179 int i = lookup_env(environ, name, len);
1180 if (i >= 0)
1181 return environ[i] + len + 1; /* skip past name and '=' */
1182 return getenv(name);
1183}
1184
1185char *mingw_getenv(const char *name)
1186{
1187 char *result = getenv_cs(name);
1188 if (!result && !strcmp(name, "TMPDIR")) {
1189 /* on Windows it is TMP and TEMP */
1190 result = getenv_cs("TMP");
1191 if (!result)
1192 result = getenv_cs("TEMP");
1193 }
1194 return result;
1195}
1196
1197/*
1198 * Note, this isn't a complete replacement for getaddrinfo. It assumes
1199 * that service contains a numerical port, or that it is null. It
1200 * does a simple search using gethostbyname, and returns one IPv4 host
1201 * if one was found.
1202 */
1203static int WSAAPI getaddrinfo_stub(const char *node, const char *service,
1204 const struct addrinfo *hints,
1205 struct addrinfo **res)
1206{
1207 struct hostent *h = NULL;
1208 struct addrinfo *ai;
1209 struct sockaddr_in *sin;
1210
1211 if (node) {
1212 h = gethostbyname(node);
1213 if (!h)
1214 return WSAGetLastError();
1215 }
1216
1217 ai = xmalloc(sizeof(struct addrinfo));
1218 *res = ai;
1219 ai->ai_flags = 0;
1220 ai->ai_family = AF_INET;
1221 ai->ai_socktype = hints ? hints->ai_socktype : 0;
1222 switch (ai->ai_socktype) {
1223 case SOCK_STREAM:
1224 ai->ai_protocol = IPPROTO_TCP;
1225 break;
1226 case SOCK_DGRAM:
1227 ai->ai_protocol = IPPROTO_UDP;
1228 break;
1229 default:
1230 ai->ai_protocol = 0;
1231 break;
1232 }
1233 ai->ai_addrlen = sizeof(struct sockaddr_in);
1234 if (hints && (hints->ai_flags & AI_CANONNAME))
1235 ai->ai_canonname = h ? xstrdup(h->h_name) : NULL;
1236 else
1237 ai->ai_canonname = NULL;
1238
1239 sin = xmalloc(ai->ai_addrlen);
1240 memset(sin, 0, ai->ai_addrlen);
1241 sin->sin_family = AF_INET;
1242 /* Note: getaddrinfo is supposed to allow service to be a string,
1243 * which should be looked up using getservbyname. This is
1244 * currently not implemented */
1245 if (service)
1246 sin->sin_port = htons(atoi(service));
1247 if (h)
1248 sin->sin_addr = *(struct in_addr *)h->h_addr;
1249 else if (hints && (hints->ai_flags & AI_PASSIVE))
1250 sin->sin_addr.s_addr = INADDR_ANY;
1251 else
1252 sin->sin_addr.s_addr = INADDR_LOOPBACK;
1253 ai->ai_addr = (struct sockaddr *)sin;
1254 ai->ai_next = 0;
1255 return 0;
1256}
1257
1258static void WSAAPI freeaddrinfo_stub(struct addrinfo *res)
1259{
1260 free(res->ai_canonname);
1261 free(res->ai_addr);
1262 free(res);
1263}
1264
1265static int WSAAPI getnameinfo_stub(const struct sockaddr *sa, socklen_t salen,
1266 char *host, DWORD hostlen,
1267 char *serv, DWORD servlen, int flags)
1268{
1269 const struct sockaddr_in *sin = (const struct sockaddr_in *)sa;
1270 if (sa->sa_family != AF_INET)
1271 return EAI_FAMILY;
1272 if (!host && !serv)
1273 return EAI_NONAME;
1274
1275 if (host && hostlen > 0) {
1276 struct hostent *ent = NULL;
1277 if (!(flags & NI_NUMERICHOST))
1278 ent = gethostbyaddr((const char *)&sin->sin_addr,
1279 sizeof(sin->sin_addr), AF_INET);
1280
1281 if (ent)
1282 snprintf(host, hostlen, "%s", ent->h_name);
1283 else if (flags & NI_NAMEREQD)
1284 return EAI_NONAME;
1285 else
1286 snprintf(host, hostlen, "%s", inet_ntoa(sin->sin_addr));
1287 }
1288
1289 if (serv && servlen > 0) {
1290 struct servent *ent = NULL;
1291 if (!(flags & NI_NUMERICSERV))
1292 ent = getservbyport(sin->sin_port,
1293 flags & NI_DGRAM ? "udp" : "tcp");
1294
1295 if (ent)
1296 snprintf(serv, servlen, "%s", ent->s_name);
1297 else
1298 snprintf(serv, servlen, "%d", ntohs(sin->sin_port));
1299 }
1300
1301 return 0;
1302}
1303
1304static HMODULE ipv6_dll = NULL;
1305static void (WSAAPI *ipv6_freeaddrinfo)(struct addrinfo *res);
1306static int (WSAAPI *ipv6_getaddrinfo)(const char *node, const char *service,
1307 const struct addrinfo *hints,
1308 struct addrinfo **res);
1309static int (WSAAPI *ipv6_getnameinfo)(const struct sockaddr *sa, socklen_t salen,
1310 char *host, DWORD hostlen,
1311 char *serv, DWORD servlen, int flags);
1312/*
1313 * gai_strerror is an inline function in the ws2tcpip.h header, so we
1314 * don't need to try to load that one dynamically.
1315 */
1316
1317static void socket_cleanup(void)
1318{
1319 WSACleanup();
1320 if (ipv6_dll)
1321 FreeLibrary(ipv6_dll);
1322 ipv6_dll = NULL;
1323 ipv6_freeaddrinfo = freeaddrinfo_stub;
1324 ipv6_getaddrinfo = getaddrinfo_stub;
1325 ipv6_getnameinfo = getnameinfo_stub;
1326}
1327
1328static void ensure_socket_initialization(void)
1329{
1330 WSADATA wsa;
1331 static int initialized = 0;
1332 const char *libraries[] = { "ws2_32.dll", "wship6.dll", NULL };
1333 const char **name;
1334
1335 if (initialized)
1336 return;
1337
1338 if (WSAStartup(MAKEWORD(2,2), &wsa))
1339 die("unable to initialize winsock subsystem, error %d",
1340 WSAGetLastError());
1341
1342 for (name = libraries; *name; name++) {
1343 ipv6_dll = LoadLibrary(*name);
1344 if (!ipv6_dll)
1345 continue;
1346
1347 ipv6_freeaddrinfo = (void (WSAAPI *)(struct addrinfo *))
1348 GetProcAddress(ipv6_dll, "freeaddrinfo");
1349 ipv6_getaddrinfo = (int (WSAAPI *)(const char *, const char *,
1350 const struct addrinfo *,
1351 struct addrinfo **))
1352 GetProcAddress(ipv6_dll, "getaddrinfo");
1353 ipv6_getnameinfo = (int (WSAAPI *)(const struct sockaddr *,
1354 socklen_t, char *, DWORD,
1355 char *, DWORD, int))
1356 GetProcAddress(ipv6_dll, "getnameinfo");
1357 if (!ipv6_freeaddrinfo || !ipv6_getaddrinfo || !ipv6_getnameinfo) {
1358 FreeLibrary(ipv6_dll);
1359 ipv6_dll = NULL;
1360 } else
1361 break;
1362 }
1363 if (!ipv6_freeaddrinfo || !ipv6_getaddrinfo || !ipv6_getnameinfo) {
1364 ipv6_freeaddrinfo = freeaddrinfo_stub;
1365 ipv6_getaddrinfo = getaddrinfo_stub;
1366 ipv6_getnameinfo = getnameinfo_stub;
1367 }
1368
1369 atexit(socket_cleanup);
1370 initialized = 1;
1371}
1372
1373#undef gethostname
1374int mingw_gethostname(char *name, int namelen)
1375{
1376 ensure_socket_initialization();
1377 return gethostname(name, namelen);
1378}
1379
1380#undef gethostbyname
1381struct hostent *mingw_gethostbyname(const char *host)
1382{
1383 ensure_socket_initialization();
1384 return gethostbyname(host);
1385}
1386
1387void mingw_freeaddrinfo(struct addrinfo *res)
1388{
1389 ipv6_freeaddrinfo(res);
1390}
1391
1392int mingw_getaddrinfo(const char *node, const char *service,
1393 const struct addrinfo *hints, struct addrinfo **res)
1394{
1395 ensure_socket_initialization();
1396 return ipv6_getaddrinfo(node, service, hints, res);
1397}
1398
1399int mingw_getnameinfo(const struct sockaddr *sa, socklen_t salen,
1400 char *host, DWORD hostlen, char *serv, DWORD servlen,
1401 int flags)
1402{
1403 ensure_socket_initialization();
1404 return ipv6_getnameinfo(sa, salen, host, hostlen, serv, servlen, flags);
1405}
1406
1407int mingw_socket(int domain, int type, int protocol)
1408{
1409 int sockfd;
1410 SOCKET s;
1411
1412 ensure_socket_initialization();
1413 s = WSASocket(domain, type, protocol, NULL, 0, 0);
1414 if (s == INVALID_SOCKET) {
1415 /*
1416 * WSAGetLastError() values are regular BSD error codes
1417 * biased by WSABASEERR.
1418 * However, strerror() does not know about networking
1419 * specific errors, which are values beginning at 38 or so.
1420 * Therefore, we choose to leave the biased error code
1421 * in errno so that _if_ someone looks up the code somewhere,
1422 * then it is at least the number that are usually listed.
1423 */
1424 errno = WSAGetLastError();
1425 return -1;
1426 }
1427 /* convert into a file descriptor */
1428 if ((sockfd = _open_osfhandle(s, O_RDWR|O_BINARY)) < 0) {
1429 closesocket(s);
1430 return error("unable to make a socket file descriptor: %s",
1431 strerror(errno));
1432 }
1433 return sockfd;
1434}
1435
1436#undef connect
1437int mingw_connect(int sockfd, struct sockaddr *sa, size_t sz)
1438{
1439 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
1440 return connect(s, sa, sz);
1441}
1442
1443#undef bind
1444int mingw_bind(int sockfd, struct sockaddr *sa, size_t sz)
1445{
1446 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
1447 return bind(s, sa, sz);
1448}
1449
1450#undef setsockopt
1451int mingw_setsockopt(int sockfd, int lvl, int optname, void *optval, int optlen)
1452{
1453 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
1454 return setsockopt(s, lvl, optname, (const char*)optval, optlen);
1455}
1456
1457#undef shutdown
1458int mingw_shutdown(int sockfd, int how)
1459{
1460 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
1461 return shutdown(s, how);
1462}
1463
1464#undef listen
1465int mingw_listen(int sockfd, int backlog)
1466{
1467 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
1468 return listen(s, backlog);
1469}
1470
1471#undef accept
1472int mingw_accept(int sockfd1, struct sockaddr *sa, socklen_t *sz)
1473{
1474 int sockfd2;
1475
1476 SOCKET s1 = (SOCKET)_get_osfhandle(sockfd1);
1477 SOCKET s2 = accept(s1, sa, sz);
1478
1479 /* convert into a file descriptor */
1480 if ((sockfd2 = _open_osfhandle(s2, O_RDWR|O_BINARY)) < 0) {
1481 int err = errno;
1482 closesocket(s2);
1483 return error("unable to make a socket file descriptor: %s",
1484 strerror(err));
1485 }
1486 return sockfd2;
1487}
1488
1489#undef rename
1490int mingw_rename(const char *pold, const char *pnew)
1491{
1492 DWORD attrs, gle;
1493 int tries = 0;
1494
1495 /*
1496 * Try native rename() first to get errno right.
1497 * It is based on MoveFile(), which cannot overwrite existing files.
1498 */
1499 if (!rename(pold, pnew))
1500 return 0;
1501 if (errno != EEXIST)
1502 return -1;
1503repeat:
1504 if (MoveFileEx(pold, pnew, MOVEFILE_REPLACE_EXISTING))
1505 return 0;
1506 /* TODO: translate more errors */
1507 gle = GetLastError();
1508 if (gle == ERROR_ACCESS_DENIED &&
1509 (attrs = GetFileAttributes(pnew)) != INVALID_FILE_ATTRIBUTES) {
1510 if (attrs & FILE_ATTRIBUTE_DIRECTORY) {
1511 errno = EISDIR;
1512 return -1;
1513 }
1514 if ((attrs & FILE_ATTRIBUTE_READONLY) &&
1515 SetFileAttributes(pnew, attrs & ~FILE_ATTRIBUTE_READONLY)) {
1516 if (MoveFileEx(pold, pnew, MOVEFILE_REPLACE_EXISTING))
1517 return 0;
1518 gle = GetLastError();
1519 /* revert file attributes on failure */
1520 SetFileAttributes(pnew, attrs);
1521 }
1522 }
1523 if (tries < ARRAY_SIZE(delay) && gle == ERROR_ACCESS_DENIED) {
1524 /*
1525 * We assume that some other process had the source or
1526 * destination file open at the wrong moment and retry.
1527 * In order to give the other process a higher chance to
1528 * complete its operation, we give up our time slice now.
1529 * If we have to retry again, we do sleep a bit.
1530 */
1531 Sleep(delay[tries]);
1532 tries++;
1533 goto repeat;
1534 }
1535 if (gle == ERROR_ACCESS_DENIED &&
1536 ask_yes_no_if_possible("Rename from '%s' to '%s' failed. "
1537 "Should I try again?", pold, pnew))
1538 goto repeat;
1539
1540 errno = EACCES;
1541 return -1;
1542}
1543
1544/*
1545 * Note that this doesn't return the actual pagesize, but
1546 * the allocation granularity. If future Windows specific git code
1547 * needs the real getpagesize function, we need to find another solution.
1548 */
1549int mingw_getpagesize(void)
1550{
1551 SYSTEM_INFO si;
1552 GetSystemInfo(&si);
1553 return si.dwAllocationGranularity;
1554}
1555
1556struct passwd *getpwuid(int uid)
1557{
1558 static char user_name[100];
1559 static struct passwd p;
1560
1561 DWORD len = sizeof(user_name);
1562 if (!GetUserName(user_name, &len))
1563 return NULL;
1564 p.pw_name = user_name;
1565 p.pw_gecos = "unknown";
1566 p.pw_dir = NULL;
1567 return &p;
1568}
1569
1570static HANDLE timer_event;
1571static HANDLE timer_thread;
1572static int timer_interval;
1573static int one_shot;
1574static sig_handler_t timer_fn = SIG_DFL, sigint_fn = SIG_DFL;
1575
1576/* The timer works like this:
1577 * The thread, ticktack(), is a trivial routine that most of the time
1578 * only waits to receive the signal to terminate. The main thread tells
1579 * the thread to terminate by setting the timer_event to the signalled
1580 * state.
1581 * But ticktack() interrupts the wait state after the timer's interval
1582 * length to call the signal handler.
1583 */
1584
1585static unsigned __stdcall ticktack(void *dummy)
1586{
1587 while (WaitForSingleObject(timer_event, timer_interval) == WAIT_TIMEOUT) {
1588 mingw_raise(SIGALRM);
1589 if (one_shot)
1590 break;
1591 }
1592 return 0;
1593}
1594
1595static int start_timer_thread(void)
1596{
1597 timer_event = CreateEvent(NULL, FALSE, FALSE, NULL);
1598 if (timer_event) {
1599 timer_thread = (HANDLE) _beginthreadex(NULL, 0, ticktack, NULL, 0, NULL);
1600 if (!timer_thread )
1601 return errno = ENOMEM,
1602 error("cannot start timer thread");
1603 } else
1604 return errno = ENOMEM,
1605 error("cannot allocate resources for timer");
1606 return 0;
1607}
1608
1609static void stop_timer_thread(void)
1610{
1611 if (timer_event)
1612 SetEvent(timer_event); /* tell thread to terminate */
1613 if (timer_thread) {
1614 int rc = WaitForSingleObject(timer_thread, 1000);
1615 if (rc == WAIT_TIMEOUT)
1616 error("timer thread did not terminate timely");
1617 else if (rc != WAIT_OBJECT_0)
1618 error("waiting for timer thread failed: %lu",
1619 GetLastError());
1620 CloseHandle(timer_thread);
1621 }
1622 if (timer_event)
1623 CloseHandle(timer_event);
1624 timer_event = NULL;
1625 timer_thread = NULL;
1626}
1627
1628static inline int is_timeval_eq(const struct timeval *i1, const struct timeval *i2)
1629{
1630 return i1->tv_sec == i2->tv_sec && i1->tv_usec == i2->tv_usec;
1631}
1632
1633int setitimer(int type, struct itimerval *in, struct itimerval *out)
1634{
1635 static const struct timeval zero;
1636 static int atexit_done;
1637
1638 if (out != NULL)
1639 return errno = EINVAL,
1640 error("setitimer param 3 != NULL not implemented");
1641 if (!is_timeval_eq(&in->it_interval, &zero) &&
1642 !is_timeval_eq(&in->it_interval, &in->it_value))
1643 return errno = EINVAL,
1644 error("setitimer: it_interval must be zero or eq it_value");
1645
1646 if (timer_thread)
1647 stop_timer_thread();
1648
1649 if (is_timeval_eq(&in->it_value, &zero) &&
1650 is_timeval_eq(&in->it_interval, &zero))
1651 return 0;
1652
1653 timer_interval = in->it_value.tv_sec * 1000 + in->it_value.tv_usec / 1000;
1654 one_shot = is_timeval_eq(&in->it_interval, &zero);
1655 if (!atexit_done) {
1656 atexit(stop_timer_thread);
1657 atexit_done = 1;
1658 }
1659 return start_timer_thread();
1660}
1661
1662int sigaction(int sig, struct sigaction *in, struct sigaction *out)
1663{
1664 if (sig != SIGALRM)
1665 return errno = EINVAL,
1666 error("sigaction only implemented for SIGALRM");
1667 if (out != NULL)
1668 return errno = EINVAL,
1669 error("sigaction: param 3 != NULL not implemented");
1670
1671 timer_fn = in->sa_handler;
1672 return 0;
1673}
1674
1675#undef signal
1676sig_handler_t mingw_signal(int sig, sig_handler_t handler)
1677{
1678 sig_handler_t old = timer_fn;
1679
1680 switch (sig) {
1681 case SIGALRM:
1682 timer_fn = handler;
1683 break;
1684
1685 case SIGINT:
1686 sigint_fn = handler;
1687 break;
1688
1689 default:
1690 return signal(sig, handler);
1691 }
1692
1693 return old;
1694}
1695
1696#undef raise
1697int mingw_raise(int sig)
1698{
1699 switch (sig) {
1700 case SIGALRM:
1701 if (timer_fn == SIG_DFL) {
1702 if (isatty(STDERR_FILENO))
1703 fputs("Alarm clock\n", stderr);
1704 exit(128 + SIGALRM);
1705 } else if (timer_fn != SIG_IGN)
1706 timer_fn(SIGALRM);
1707 return 0;
1708
1709 case SIGINT:
1710 if (sigint_fn == SIG_DFL)
1711 exit(128 + SIGINT);
1712 else if (sigint_fn != SIG_IGN)
1713 sigint_fn(SIGINT);
1714 return 0;
1715
1716 default:
1717 return raise(sig);
1718 }
1719}
1720
1721
1722static const char *make_backslash_path(const char *path)
1723{
1724 static char buf[PATH_MAX + 1];
1725 char *c;
1726
1727 if (strlcpy(buf, path, PATH_MAX) >= PATH_MAX)
1728 die("Too long path: %.*s", 60, path);
1729
1730 for (c = buf; *c; c++) {
1731 if (*c == '/')
1732 *c = '\\';
1733 }
1734 return buf;
1735}
1736
1737void mingw_open_html(const char *unixpath)
1738{
1739 const char *htmlpath = make_backslash_path(unixpath);
1740 typedef HINSTANCE (WINAPI *T)(HWND, const char *,
1741 const char *, const char *, const char *, INT);
1742 T ShellExecute;
1743 HMODULE shell32;
1744 int r;
1745
1746 shell32 = LoadLibrary("shell32.dll");
1747 if (!shell32)
1748 die("cannot load shell32.dll");
1749 ShellExecute = (T)GetProcAddress(shell32, "ShellExecuteA");
1750 if (!ShellExecute)
1751 die("cannot run browser");
1752
1753 printf("Launching default browser to display HTML ...\n");
1754 r = (int)ShellExecute(NULL, "open", htmlpath, NULL, "\\", SW_SHOWNORMAL);
1755 FreeLibrary(shell32);
1756 /* see the MSDN documentation referring to the result codes here */
1757 if (r <= 32) {
1758 die("failed to launch browser for %.*s", MAX_PATH, unixpath);
1759 }
1760}
1761
1762int link(const char *oldpath, const char *newpath)
1763{
1764 typedef BOOL (WINAPI *T)(const char*, const char*, LPSECURITY_ATTRIBUTES);
1765 static T create_hard_link = NULL;
1766 if (!create_hard_link) {
1767 create_hard_link = (T) GetProcAddress(
1768 GetModuleHandle("kernel32.dll"), "CreateHardLinkA");
1769 if (!create_hard_link)
1770 create_hard_link = (T)-1;
1771 }
1772 if (create_hard_link == (T)-1) {
1773 errno = ENOSYS;
1774 return -1;
1775 }
1776 if (!create_hard_link(newpath, oldpath, NULL)) {
1777 errno = err_win_to_posix(GetLastError());
1778 return -1;
1779 }
1780 return 0;
1781}
1782
1783char *getpass(const char *prompt)
1784{
1785 struct strbuf buf = STRBUF_INIT;
1786
1787 fputs(prompt, stderr);
1788 for (;;) {
1789 char c = _getch();
1790 if (c == '\r' || c == '\n')
1791 break;
1792 strbuf_addch(&buf, c);
1793 }
1794 fputs("\n", stderr);
1795 return strbuf_detach(&buf, NULL);
1796}
1797
1798pid_t waitpid(pid_t pid, int *status, int options)
1799{
1800 HANDLE h = OpenProcess(SYNCHRONIZE | PROCESS_QUERY_INFORMATION,
1801 FALSE, pid);
1802 if (!h) {
1803 errno = ECHILD;
1804 return -1;
1805 }
1806
1807 if (pid > 0 && options & WNOHANG) {
1808 if (WAIT_OBJECT_0 != WaitForSingleObject(h, 0)) {
1809 CloseHandle(h);
1810 return 0;
1811 }
1812 options &= ~WNOHANG;
1813 }
1814
1815 if (options == 0) {
1816 struct pinfo_t **ppinfo;
1817 if (WaitForSingleObject(h, INFINITE) != WAIT_OBJECT_0) {
1818 CloseHandle(h);
1819 return 0;
1820 }
1821
1822 if (status)
1823 GetExitCodeProcess(h, (LPDWORD)status);
1824
1825 EnterCriticalSection(&pinfo_cs);
1826
1827 ppinfo = &pinfo;
1828 while (*ppinfo) {
1829 struct pinfo_t *info = *ppinfo;
1830 if (info->pid == pid) {
1831 CloseHandle(info->proc);
1832 *ppinfo = info->next;
1833 free(info);
1834 break;
1835 }
1836 ppinfo = &info->next;
1837 }
1838
1839 LeaveCriticalSection(&pinfo_cs);
1840
1841 CloseHandle(h);
1842 return pid;
1843 }
1844 CloseHandle(h);
1845
1846 errno = EINVAL;
1847 return -1;
1848}