1 #include "../git-compat-util.h"
2 #include "win32.h"
3 #include <conio.h>
4 #include "../strbuf.h"
6 int err_win_to_posix(DWORD winerr)
7 {
8 int error = ENOSYS;
9 switch(winerr) {
10 case ERROR_ACCESS_DENIED: error = EACCES; break;
11 case ERROR_ACCOUNT_DISABLED: error = EACCES; break;
12 case ERROR_ACCOUNT_RESTRICTION: error = EACCES; break;
13 case ERROR_ALREADY_ASSIGNED: error = EBUSY; break;
14 case ERROR_ALREADY_EXISTS: error = EEXIST; break;
15 case ERROR_ARITHMETIC_OVERFLOW: error = ERANGE; break;
16 case ERROR_BAD_COMMAND: error = EIO; break;
17 case ERROR_BAD_DEVICE: error = ENODEV; break;
18 case ERROR_BAD_DRIVER_LEVEL: error = ENXIO; break;
19 case ERROR_BAD_EXE_FORMAT: error = ENOEXEC; break;
20 case ERROR_BAD_FORMAT: error = ENOEXEC; break;
21 case ERROR_BAD_LENGTH: error = EINVAL; break;
22 case ERROR_BAD_PATHNAME: error = ENOENT; break;
23 case ERROR_BAD_PIPE: error = EPIPE; break;
24 case ERROR_BAD_UNIT: error = ENODEV; break;
25 case ERROR_BAD_USERNAME: error = EINVAL; break;
26 case ERROR_BROKEN_PIPE: error = EPIPE; break;
27 case ERROR_BUFFER_OVERFLOW: error = ENAMETOOLONG; break;
28 case ERROR_BUSY: error = EBUSY; break;
29 case ERROR_BUSY_DRIVE: error = EBUSY; break;
30 case ERROR_CALL_NOT_IMPLEMENTED: error = ENOSYS; break;
31 case ERROR_CANNOT_MAKE: error = EACCES; break;
32 case ERROR_CANTOPEN: error = EIO; break;
33 case ERROR_CANTREAD: error = EIO; break;
34 case ERROR_CANTWRITE: error = EIO; break;
35 case ERROR_CRC: error = EIO; break;
36 case ERROR_CURRENT_DIRECTORY: error = EACCES; break;
37 case ERROR_DEVICE_IN_USE: error = EBUSY; break;
38 case ERROR_DEV_NOT_EXIST: error = ENODEV; break;
39 case ERROR_DIRECTORY: error = EINVAL; break;
40 case ERROR_DIR_NOT_EMPTY: error = ENOTEMPTY; break;
41 case ERROR_DISK_CHANGE: error = EIO; break;
42 case ERROR_DISK_FULL: error = ENOSPC; break;
43 case ERROR_DRIVE_LOCKED: error = EBUSY; break;
44 case ERROR_ENVVAR_NOT_FOUND: error = EINVAL; break;
45 case ERROR_EXE_MARKED_INVALID: error = ENOEXEC; break;
46 case ERROR_FILENAME_EXCED_RANGE: error = ENAMETOOLONG; break;
47 case ERROR_FILE_EXISTS: error = EEXIST; break;
48 case ERROR_FILE_INVALID: error = ENODEV; break;
49 case ERROR_FILE_NOT_FOUND: error = ENOENT; break;
50 case ERROR_GEN_FAILURE: error = EIO; break;
51 case ERROR_HANDLE_DISK_FULL: error = ENOSPC; break;
52 case ERROR_INSUFFICIENT_BUFFER: error = ENOMEM; break;
53 case ERROR_INVALID_ACCESS: error = EACCES; break;
54 case ERROR_INVALID_ADDRESS: error = EFAULT; break;
55 case ERROR_INVALID_BLOCK: error = EFAULT; break;
56 case ERROR_INVALID_DATA: error = EINVAL; break;
57 case ERROR_INVALID_DRIVE: error = ENODEV; break;
58 case ERROR_INVALID_EXE_SIGNATURE: error = ENOEXEC; break;
59 case ERROR_INVALID_FLAGS: error = EINVAL; break;
60 case ERROR_INVALID_FUNCTION: error = ENOSYS; break;
61 case ERROR_INVALID_HANDLE: error = EBADF; break;
62 case ERROR_INVALID_LOGON_HOURS: error = EACCES; break;
63 case ERROR_INVALID_NAME: error = EINVAL; break;
64 case ERROR_INVALID_OWNER: error = EINVAL; break;
65 case ERROR_INVALID_PARAMETER: error = EINVAL; break;
66 case ERROR_INVALID_PASSWORD: error = EPERM; break;
67 case ERROR_INVALID_PRIMARY_GROUP: error = EINVAL; break;
68 case ERROR_INVALID_SIGNAL_NUMBER: error = EINVAL; break;
69 case ERROR_INVALID_TARGET_HANDLE: error = EIO; break;
70 case ERROR_INVALID_WORKSTATION: error = EACCES; break;
71 case ERROR_IO_DEVICE: error = EIO; break;
72 case ERROR_IO_INCOMPLETE: error = EINTR; break;
73 case ERROR_LOCKED: error = EBUSY; break;
74 case ERROR_LOCK_VIOLATION: error = EACCES; break;
75 case ERROR_LOGON_FAILURE: error = EACCES; break;
76 case ERROR_MAPPED_ALIGNMENT: error = EINVAL; break;
77 case ERROR_META_EXPANSION_TOO_LONG: error = E2BIG; break;
78 case ERROR_MORE_DATA: error = EPIPE; break;
79 case ERROR_NEGATIVE_SEEK: error = ESPIPE; break;
80 case ERROR_NOACCESS: error = EFAULT; break;
81 case ERROR_NONE_MAPPED: error = EINVAL; break;
82 case ERROR_NOT_ENOUGH_MEMORY: error = ENOMEM; break;
83 case ERROR_NOT_READY: error = EAGAIN; break;
84 case ERROR_NOT_SAME_DEVICE: error = EXDEV; break;
85 case ERROR_NO_DATA: error = EPIPE; break;
86 case ERROR_NO_MORE_SEARCH_HANDLES: error = EIO; break;
87 case ERROR_NO_PROC_SLOTS: error = EAGAIN; break;
88 case ERROR_NO_SUCH_PRIVILEGE: error = EACCES; break;
89 case ERROR_OPEN_FAILED: error = EIO; break;
90 case ERROR_OPEN_FILES: error = EBUSY; break;
91 case ERROR_OPERATION_ABORTED: error = EINTR; break;
92 case ERROR_OUTOFMEMORY: error = ENOMEM; break;
93 case ERROR_PASSWORD_EXPIRED: error = EACCES; break;
94 case ERROR_PATH_BUSY: error = EBUSY; break;
95 case ERROR_PATH_NOT_FOUND: error = ENOENT; break;
96 case ERROR_PIPE_BUSY: error = EBUSY; break;
97 case ERROR_PIPE_CONNECTED: error = EPIPE; break;
98 case ERROR_PIPE_LISTENING: error = EPIPE; break;
99 case ERROR_PIPE_NOT_CONNECTED: error = EPIPE; break;
100 case ERROR_PRIVILEGE_NOT_HELD: error = EACCES; break;
101 case ERROR_READ_FAULT: error = EIO; break;
102 case ERROR_SEEK: error = EIO; break;
103 case ERROR_SEEK_ON_DEVICE: error = ESPIPE; break;
104 case ERROR_SHARING_BUFFER_EXCEEDED: error = ENFILE; break;
105 case ERROR_SHARING_VIOLATION: error = EACCES; break;
106 case ERROR_STACK_OVERFLOW: error = ENOMEM; break;
107 case ERROR_SWAPERROR: error = ENOENT; break;
108 case ERROR_TOO_MANY_MODULES: error = EMFILE; break;
109 case ERROR_TOO_MANY_OPEN_FILES: error = EMFILE; break;
110 case ERROR_UNRECOGNIZED_MEDIA: error = ENXIO; break;
111 case ERROR_UNRECOGNIZED_VOLUME: error = ENODEV; break;
112 case ERROR_WAIT_NO_CHILDREN: error = ECHILD; break;
113 case ERROR_WRITE_FAULT: error = EIO; break;
114 case ERROR_WRITE_PROTECT: error = EROFS; break;
115 }
116 return error;
117 }
119 #undef open
120 int mingw_open (const char *filename, int oflags, ...)
121 {
122 va_list args;
123 unsigned mode;
124 int fd;
126 va_start(args, oflags);
127 mode = va_arg(args, int);
128 va_end(args);
130 if (!strcmp(filename, "/dev/null"))
131 filename = "nul";
133 fd = open(filename, oflags, mode);
135 if (fd < 0 && (oflags & O_CREAT) && errno == EACCES) {
136 DWORD attrs = GetFileAttributes(filename);
137 if (attrs != INVALID_FILE_ATTRIBUTES && (attrs & FILE_ATTRIBUTE_DIRECTORY))
138 errno = EISDIR;
139 }
140 return fd;
141 }
143 /*
144 * The unit of FILETIME is 100-nanoseconds since January 1, 1601, UTC.
145 * Returns the 100-nanoseconds ("hekto nanoseconds") since the epoch.
146 */
147 static inline long long filetime_to_hnsec(const FILETIME *ft)
148 {
149 long long winTime = ((long long)ft->dwHighDateTime << 32) + ft->dwLowDateTime;
150 /* Windows to Unix Epoch conversion */
151 return winTime - 116444736000000000LL;
152 }
154 static inline time_t filetime_to_time_t(const FILETIME *ft)
155 {
156 return (time_t)(filetime_to_hnsec(ft) / 10000000);
157 }
159 /* We keep the do_lstat code in a separate function to avoid recursion.
160 * When a path ends with a slash, the stat will fail with ENOENT. In
161 * this case, we strip the trailing slashes and stat again.
162 */
163 static int do_lstat(const char *file_name, struct stat *buf)
164 {
165 WIN32_FILE_ATTRIBUTE_DATA fdata;
167 if (!(errno = get_file_attr(file_name, &fdata))) {
168 buf->st_ino = 0;
169 buf->st_gid = 0;
170 buf->st_uid = 0;
171 buf->st_nlink = 1;
172 buf->st_mode = file_attr_to_st_mode(fdata.dwFileAttributes);
173 buf->st_size = fdata.nFileSizeLow |
174 (((off_t)fdata.nFileSizeHigh)<<32);
175 buf->st_dev = buf->st_rdev = 0; /* not used by Git */
176 buf->st_atime = filetime_to_time_t(&(fdata.ftLastAccessTime));
177 buf->st_mtime = filetime_to_time_t(&(fdata.ftLastWriteTime));
178 buf->st_ctime = filetime_to_time_t(&(fdata.ftCreationTime));
179 return 0;
180 }
181 return -1;
182 }
184 /* We provide our own lstat/fstat functions, since the provided
185 * lstat/fstat functions are so slow. These stat functions are
186 * tailored for Git's usage (read: fast), and are not meant to be
187 * complete. Note that Git stat()s are redirected to mingw_lstat()
188 * too, since Windows doesn't really handle symlinks that well.
189 */
190 int mingw_lstat(const char *file_name, struct stat *buf)
191 {
192 int namelen;
193 static char alt_name[PATH_MAX];
195 if (!do_lstat(file_name, buf))
196 return 0;
198 /* if file_name ended in a '/', Windows returned ENOENT;
199 * try again without trailing slashes
200 */
201 if (errno != ENOENT)
202 return -1;
204 namelen = strlen(file_name);
205 if (namelen && file_name[namelen-1] != '/')
206 return -1;
207 while (namelen && file_name[namelen-1] == '/')
208 --namelen;
209 if (!namelen || namelen >= PATH_MAX)
210 return -1;
212 memcpy(alt_name, file_name, namelen);
213 alt_name[namelen] = 0;
214 return do_lstat(alt_name, buf);
215 }
217 #undef fstat
218 int mingw_fstat(int fd, struct stat *buf)
219 {
220 HANDLE fh = (HANDLE)_get_osfhandle(fd);
221 BY_HANDLE_FILE_INFORMATION fdata;
223 if (fh == INVALID_HANDLE_VALUE) {
224 errno = EBADF;
225 return -1;
226 }
227 /* direct non-file handles to MS's fstat() */
228 if (GetFileType(fh) != FILE_TYPE_DISK)
229 return _fstati64(fd, buf);
231 if (GetFileInformationByHandle(fh, &fdata)) {
232 buf->st_ino = 0;
233 buf->st_gid = 0;
234 buf->st_uid = 0;
235 buf->st_nlink = 1;
236 buf->st_mode = file_attr_to_st_mode(fdata.dwFileAttributes);
237 buf->st_size = fdata.nFileSizeLow |
238 (((off_t)fdata.nFileSizeHigh)<<32);
239 buf->st_dev = buf->st_rdev = 0; /* not used by Git */
240 buf->st_atime = filetime_to_time_t(&(fdata.ftLastAccessTime));
241 buf->st_mtime = filetime_to_time_t(&(fdata.ftLastWriteTime));
242 buf->st_ctime = filetime_to_time_t(&(fdata.ftCreationTime));
243 return 0;
244 }
245 errno = EBADF;
246 return -1;
247 }
249 static inline void time_t_to_filetime(time_t t, FILETIME *ft)
250 {
251 long long winTime = t * 10000000LL + 116444736000000000LL;
252 ft->dwLowDateTime = winTime;
253 ft->dwHighDateTime = winTime >> 32;
254 }
256 int mingw_utime (const char *file_name, const struct utimbuf *times)
257 {
258 FILETIME mft, aft;
259 int fh, rc;
261 /* must have write permission */
262 if ((fh = open(file_name, O_RDWR | O_BINARY)) < 0)
263 return -1;
265 time_t_to_filetime(times->modtime, &mft);
266 time_t_to_filetime(times->actime, &aft);
267 if (!SetFileTime((HANDLE)_get_osfhandle(fh), NULL, &aft, &mft)) {
268 errno = EINVAL;
269 rc = -1;
270 } else
271 rc = 0;
272 close(fh);
273 return rc;
274 }
276 unsigned int sleep (unsigned int seconds)
277 {
278 Sleep(seconds*1000);
279 return 0;
280 }
282 int mkstemp(char *template)
283 {
284 char *filename = mktemp(template);
285 if (filename == NULL)
286 return -1;
287 return open(filename, O_RDWR | O_CREAT, 0600);
288 }
290 int gettimeofday(struct timeval *tv, void *tz)
291 {
292 FILETIME ft;
293 long long hnsec;
295 GetSystemTimeAsFileTime(&ft);
296 hnsec = filetime_to_hnsec(&ft);
297 tv->tv_sec = hnsec / 10000000;
298 tv->tv_usec = (hnsec % 10000000) / 10;
299 return 0;
300 }
302 int pipe(int filedes[2])
303 {
304 HANDLE h[2];
306 /* this creates non-inheritable handles */
307 if (!CreatePipe(&h[0], &h[1], NULL, 8192)) {
308 errno = err_win_to_posix(GetLastError());
309 return -1;
310 }
311 filedes[0] = _open_osfhandle((int)h[0], O_NOINHERIT);
312 if (filedes[0] < 0) {
313 CloseHandle(h[0]);
314 CloseHandle(h[1]);
315 return -1;
316 }
317 filedes[1] = _open_osfhandle((int)h[1], O_NOINHERIT);
318 if (filedes[0] < 0) {
319 close(filedes[0]);
320 CloseHandle(h[1]);
321 return -1;
322 }
323 return 0;
324 }
326 int poll(struct pollfd *ufds, unsigned int nfds, int timeout)
327 {
328 int i, pending;
330 if (timeout >= 0) {
331 if (nfds == 0) {
332 Sleep(timeout);
333 return 0;
334 }
335 return errno = EINVAL, error("poll timeout not supported");
336 }
338 /* When there is only one fd to wait for, then we pretend that
339 * input is available and let the actual wait happen when the
340 * caller invokes read().
341 */
342 if (nfds == 1) {
343 if (!(ufds[0].events & POLLIN))
344 return errno = EINVAL, error("POLLIN not set");
345 ufds[0].revents = POLLIN;
346 return 0;
347 }
349 repeat:
350 pending = 0;
351 for (i = 0; i < nfds; i++) {
352 DWORD avail = 0;
353 HANDLE h = (HANDLE) _get_osfhandle(ufds[i].fd);
354 if (h == INVALID_HANDLE_VALUE)
355 return -1; /* errno was set */
357 if (!(ufds[i].events & POLLIN))
358 return errno = EINVAL, error("POLLIN not set");
360 /* this emulation works only for pipes */
361 if (!PeekNamedPipe(h, NULL, 0, NULL, &avail, NULL)) {
362 int err = GetLastError();
363 if (err == ERROR_BROKEN_PIPE) {
364 ufds[i].revents = POLLHUP;
365 pending++;
366 } else {
367 errno = EINVAL;
368 return error("PeekNamedPipe failed,"
369 " GetLastError: %u", err);
370 }
371 } else if (avail) {
372 ufds[i].revents = POLLIN;
373 pending++;
374 } else
375 ufds[i].revents = 0;
376 }
377 if (!pending) {
378 /* The only times that we spin here is when the process
379 * that is connected through the pipes is waiting for
380 * its own input data to become available. But since
381 * the process (pack-objects) is itself CPU intensive,
382 * it will happily pick up the time slice that we are
383 * relinquishing here.
384 */
385 Sleep(0);
386 goto repeat;
387 }
388 return 0;
389 }
391 struct tm *gmtime_r(const time_t *timep, struct tm *result)
392 {
393 /* gmtime() in MSVCRT.DLL is thread-safe, but not reentrant */
394 memcpy(result, gmtime(timep), sizeof(struct tm));
395 return result;
396 }
398 struct tm *localtime_r(const time_t *timep, struct tm *result)
399 {
400 /* localtime() in MSVCRT.DLL is thread-safe, but not reentrant */
401 memcpy(result, localtime(timep), sizeof(struct tm));
402 return result;
403 }
405 #undef getcwd
406 char *mingw_getcwd(char *pointer, int len)
407 {
408 int i;
409 char *ret = getcwd(pointer, len);
410 if (!ret)
411 return ret;
412 for (i = 0; pointer[i]; i++)
413 if (pointer[i] == '\\')
414 pointer[i] = '/';
415 return ret;
416 }
418 #undef getenv
419 char *mingw_getenv(const char *name)
420 {
421 char *result = getenv(name);
422 if (!result && !strcmp(name, "TMPDIR")) {
423 /* on Windows it is TMP and TEMP */
424 result = getenv("TMP");
425 if (!result)
426 result = getenv("TEMP");
427 }
428 return result;
429 }
431 /*
432 * See http://msdn2.microsoft.com/en-us/library/17w5ykft(vs.71).aspx
433 * (Parsing C++ Command-Line Arguments)
434 */
435 static const char *quote_arg(const char *arg)
436 {
437 /* count chars to quote */
438 int len = 0, n = 0;
439 int force_quotes = 0;
440 char *q, *d;
441 const char *p = arg;
442 if (!*p) force_quotes = 1;
443 while (*p) {
444 if (isspace(*p) || *p == '*' || *p == '?' || *p == '{' || *p == '\'')
445 force_quotes = 1;
446 else if (*p == '"')
447 n++;
448 else if (*p == '\\') {
449 int count = 0;
450 while (*p == '\\') {
451 count++;
452 p++;
453 len++;
454 }
455 if (*p == '"')
456 n += count*2 + 1;
457 continue;
458 }
459 len++;
460 p++;
461 }
462 if (!force_quotes && n == 0)
463 return arg;
465 /* insert \ where necessary */
466 d = q = xmalloc(len+n+3);
467 *d++ = '"';
468 while (*arg) {
469 if (*arg == '"')
470 *d++ = '\\';
471 else if (*arg == '\\') {
472 int count = 0;
473 while (*arg == '\\') {
474 count++;
475 *d++ = *arg++;
476 }
477 if (*arg == '"') {
478 while (count-- > 0)
479 *d++ = '\\';
480 *d++ = '\\';
481 }
482 }
483 *d++ = *arg++;
484 }
485 *d++ = '"';
486 *d++ = 0;
487 return q;
488 }
490 static const char *parse_interpreter(const char *cmd)
491 {
492 static char buf[100];
493 char *p, *opt;
494 int n, fd;
496 /* don't even try a .exe */
497 n = strlen(cmd);
498 if (n >= 4 && !strcasecmp(cmd+n-4, ".exe"))
499 return NULL;
501 fd = open(cmd, O_RDONLY);
502 if (fd < 0)
503 return NULL;
504 n = read(fd, buf, sizeof(buf)-1);
505 close(fd);
506 if (n < 4) /* at least '#!/x' and not error */
507 return NULL;
509 if (buf[0] != '#' || buf[1] != '!')
510 return NULL;
511 buf[n] = '\0';
512 p = buf + strcspn(buf, "\r\n");
513 if (!*p)
514 return NULL;
516 *p = '\0';
517 if (!(p = strrchr(buf+2, '/')) && !(p = strrchr(buf+2, '\\')))
518 return NULL;
519 /* strip options */
520 if ((opt = strchr(p+1, ' ')))
521 *opt = '\0';
522 return p+1;
523 }
525 /*
526 * Splits the PATH into parts.
527 */
528 static char **get_path_split(void)
529 {
530 char *p, **path, *envpath = getenv("PATH");
531 int i, n = 0;
533 if (!envpath || !*envpath)
534 return NULL;
536 envpath = xstrdup(envpath);
537 p = envpath;
538 while (p) {
539 char *dir = p;
540 p = strchr(p, ';');
541 if (p) *p++ = '\0';
542 if (*dir) { /* not earlier, catches series of ; */
543 ++n;
544 }
545 }
546 if (!n)
547 return NULL;
549 path = xmalloc((n+1)*sizeof(char *));
550 p = envpath;
551 i = 0;
552 do {
553 if (*p)
554 path[i++] = xstrdup(p);
555 p = p+strlen(p)+1;
556 } while (i < n);
557 path[i] = NULL;
559 free(envpath);
561 return path;
562 }
564 static void free_path_split(char **path)
565 {
566 char **p = path;
568 if (!path)
569 return;
571 while (*p)
572 free(*p++);
573 free(path);
574 }
576 /*
577 * exe_only means that we only want to detect .exe files, but not scripts
578 * (which do not have an extension)
579 */
580 static char *lookup_prog(const char *dir, const char *cmd, int isexe, int exe_only)
581 {
582 char path[MAX_PATH];
583 snprintf(path, sizeof(path), "%s/%s.exe", dir, cmd);
585 if (!isexe && access(path, F_OK) == 0)
586 return xstrdup(path);
587 path[strlen(path)-4] = '\0';
588 if ((!exe_only || isexe) && access(path, F_OK) == 0)
589 if (!(GetFileAttributes(path) & FILE_ATTRIBUTE_DIRECTORY))
590 return xstrdup(path);
591 return NULL;
592 }
594 /*
595 * Determines the absolute path of cmd using the the split path in path.
596 * If cmd contains a slash or backslash, no lookup is performed.
597 */
598 static char *path_lookup(const char *cmd, char **path, int exe_only)
599 {
600 char *prog = NULL;
601 int len = strlen(cmd);
602 int isexe = len >= 4 && !strcasecmp(cmd+len-4, ".exe");
604 if (strchr(cmd, '/') || strchr(cmd, '\\'))
605 prog = xstrdup(cmd);
607 while (!prog && *path)
608 prog = lookup_prog(*path++, cmd, isexe, exe_only);
610 return prog;
611 }
613 static int env_compare(const void *a, const void *b)
614 {
615 char *const *ea = a;
616 char *const *eb = b;
617 return strcasecmp(*ea, *eb);
618 }
620 static pid_t mingw_spawnve_fd(const char *cmd, const char **argv, char **env,
621 int prepend_cmd, int fhin, int fhout, int fherr)
622 {
623 STARTUPINFO si;
624 PROCESS_INFORMATION pi;
625 struct strbuf envblk, args;
626 unsigned flags;
627 BOOL ret;
629 /* Determine whether or not we are associated to a console */
630 HANDLE cons = CreateFile("CONOUT$", GENERIC_WRITE,
631 FILE_SHARE_WRITE, NULL, OPEN_EXISTING,
632 FILE_ATTRIBUTE_NORMAL, NULL);
633 if (cons == INVALID_HANDLE_VALUE) {
634 /* There is no console associated with this process.
635 * Since the child is a console process, Windows
636 * would normally create a console window. But
637 * since we'll be redirecting std streams, we do
638 * not need the console.
639 * It is necessary to use DETACHED_PROCESS
640 * instead of CREATE_NO_WINDOW to make ssh
641 * recognize that it has no console.
642 */
643 flags = DETACHED_PROCESS;
644 } else {
645 /* There is already a console. If we specified
646 * DETACHED_PROCESS here, too, Windows would
647 * disassociate the child from the console.
648 * The same is true for CREATE_NO_WINDOW.
649 * Go figure!
650 */
651 flags = 0;
652 CloseHandle(cons);
653 }
654 memset(&si, 0, sizeof(si));
655 si.cb = sizeof(si);
656 si.dwFlags = STARTF_USESTDHANDLES;
657 si.hStdInput = (HANDLE) _get_osfhandle(fhin);
658 si.hStdOutput = (HANDLE) _get_osfhandle(fhout);
659 si.hStdError = (HANDLE) _get_osfhandle(fherr);
661 /* concatenate argv, quoting args as we go */
662 strbuf_init(&args, 0);
663 if (prepend_cmd) {
664 char *quoted = (char *)quote_arg(cmd);
665 strbuf_addstr(&args, quoted);
666 if (quoted != cmd)
667 free(quoted);
668 }
669 for (; *argv; argv++) {
670 char *quoted = (char *)quote_arg(*argv);
671 if (*args.buf)
672 strbuf_addch(&args, ' ');
673 strbuf_addstr(&args, quoted);
674 if (quoted != *argv)
675 free(quoted);
676 }
678 if (env) {
679 int count = 0;
680 char **e, **sorted_env;
682 for (e = env; *e; e++)
683 count++;
685 /* environment must be sorted */
686 sorted_env = xmalloc(sizeof(*sorted_env) * (count + 1));
687 memcpy(sorted_env, env, sizeof(*sorted_env) * (count + 1));
688 qsort(sorted_env, count, sizeof(*sorted_env), env_compare);
690 strbuf_init(&envblk, 0);
691 for (e = sorted_env; *e; e++) {
692 strbuf_addstr(&envblk, *e);
693 strbuf_addch(&envblk, '\0');
694 }
695 free(sorted_env);
696 }
698 memset(&pi, 0, sizeof(pi));
699 ret = CreateProcess(cmd, args.buf, NULL, NULL, TRUE, flags,
700 env ? envblk.buf : NULL, NULL, &si, &pi);
702 if (env)
703 strbuf_release(&envblk);
704 strbuf_release(&args);
706 if (!ret) {
707 errno = ENOENT;
708 return -1;
709 }
710 CloseHandle(pi.hThread);
711 return (pid_t)pi.hProcess;
712 }
714 static pid_t mingw_spawnve(const char *cmd, const char **argv, char **env,
715 int prepend_cmd)
716 {
717 return mingw_spawnve_fd(cmd, argv, env, prepend_cmd, 0, 1, 2);
718 }
720 pid_t mingw_spawnvpe(const char *cmd, const char **argv, char **env,
721 int fhin, int fhout, int fherr)
722 {
723 pid_t pid;
724 char **path = get_path_split();
725 char *prog = path_lookup(cmd, path, 0);
727 if (!prog) {
728 errno = ENOENT;
729 pid = -1;
730 }
731 else {
732 const char *interpr = parse_interpreter(prog);
734 if (interpr) {
735 const char *argv0 = argv[0];
736 char *iprog = path_lookup(interpr, path, 1);
737 argv[0] = prog;
738 if (!iprog) {
739 errno = ENOENT;
740 pid = -1;
741 }
742 else {
743 pid = mingw_spawnve_fd(iprog, argv, env, 1,
744 fhin, fhout, fherr);
745 free(iprog);
746 }
747 argv[0] = argv0;
748 }
749 else
750 pid = mingw_spawnve_fd(prog, argv, env, 0,
751 fhin, fhout, fherr);
752 free(prog);
753 }
754 free_path_split(path);
755 return pid;
756 }
758 static int try_shell_exec(const char *cmd, char *const *argv, char **env)
759 {
760 const char *interpr = parse_interpreter(cmd);
761 char **path;
762 char *prog;
763 int pid = 0;
765 if (!interpr)
766 return 0;
767 path = get_path_split();
768 prog = path_lookup(interpr, path, 1);
769 if (prog) {
770 int argc = 0;
771 const char **argv2;
772 while (argv[argc]) argc++;
773 argv2 = xmalloc(sizeof(*argv) * (argc+1));
774 argv2[0] = (char *)cmd; /* full path to the script file */
775 memcpy(&argv2[1], &argv[1], sizeof(*argv) * argc);
776 pid = mingw_spawnve(prog, argv2, env, 1);
777 if (pid >= 0) {
778 int status;
779 if (waitpid(pid, &status, 0) < 0)
780 status = 255;
781 exit(status);
782 }
783 pid = 1; /* indicate that we tried but failed */
784 free(prog);
785 free(argv2);
786 }
787 free_path_split(path);
788 return pid;
789 }
791 static void mingw_execve(const char *cmd, char *const *argv, char *const *env)
792 {
793 /* check if git_command is a shell script */
794 if (!try_shell_exec(cmd, argv, (char **)env)) {
795 int pid, status;
797 pid = mingw_spawnve(cmd, (const char **)argv, (char **)env, 0);
798 if (pid < 0)
799 return;
800 if (waitpid(pid, &status, 0) < 0)
801 status = 255;
802 exit(status);
803 }
804 }
806 void mingw_execvp(const char *cmd, char *const *argv)
807 {
808 char **path = get_path_split();
809 char *prog = path_lookup(cmd, path, 0);
811 if (prog) {
812 mingw_execve(prog, argv, environ);
813 free(prog);
814 } else
815 errno = ENOENT;
817 free_path_split(path);
818 }
820 static char **copy_environ(void)
821 {
822 char **env;
823 int i = 0;
824 while (environ[i])
825 i++;
826 env = xmalloc((i+1)*sizeof(*env));
827 for (i = 0; environ[i]; i++)
828 env[i] = xstrdup(environ[i]);
829 env[i] = NULL;
830 return env;
831 }
833 void free_environ(char **env)
834 {
835 int i;
836 for (i = 0; env[i]; i++)
837 free(env[i]);
838 free(env);
839 }
841 static int lookup_env(char **env, const char *name, size_t nmln)
842 {
843 int i;
845 for (i = 0; env[i]; i++) {
846 if (0 == strncmp(env[i], name, nmln)
847 && '=' == env[i][nmln])
848 /* matches */
849 return i;
850 }
851 return -1;
852 }
854 /*
855 * If name contains '=', then sets the variable, otherwise it unsets it
856 */
857 static char **env_setenv(char **env, const char *name)
858 {
859 char *eq = strchrnul(name, '=');
860 int i = lookup_env(env, name, eq-name);
862 if (i < 0) {
863 if (*eq) {
864 for (i = 0; env[i]; i++)
865 ;
866 env = xrealloc(env, (i+2)*sizeof(*env));
867 env[i] = xstrdup(name);
868 env[i+1] = NULL;
869 }
870 }
871 else {
872 free(env[i]);
873 if (*eq)
874 env[i] = xstrdup(name);
875 else
876 for (; env[i]; i++)
877 env[i] = env[i+1];
878 }
879 return env;
880 }
882 /*
883 * Copies global environ and adjusts variables as specified by vars.
884 */
885 char **make_augmented_environ(const char *const *vars)
886 {
887 char **env = copy_environ();
889 while (*vars)
890 env = env_setenv(env, *vars++);
891 return env;
892 }
894 /*
895 * Note, this isn't a complete replacement for getaddrinfo. It assumes
896 * that service contains a numerical port, or that it it is null. It
897 * does a simple search using gethostbyname, and returns one IPv4 host
898 * if one was found.
899 */
900 static int WSAAPI getaddrinfo_stub(const char *node, const char *service,
901 const struct addrinfo *hints,
902 struct addrinfo **res)
903 {
904 struct hostent *h = gethostbyname(node);
905 struct addrinfo *ai;
906 struct sockaddr_in *sin;
908 if (!h)
909 return WSAGetLastError();
911 ai = xmalloc(sizeof(struct addrinfo));
912 *res = ai;
913 ai->ai_flags = 0;
914 ai->ai_family = AF_INET;
915 ai->ai_socktype = hints->ai_socktype;
916 switch (hints->ai_socktype) {
917 case SOCK_STREAM:
918 ai->ai_protocol = IPPROTO_TCP;
919 break;
920 case SOCK_DGRAM:
921 ai->ai_protocol = IPPROTO_UDP;
922 break;
923 default:
924 ai->ai_protocol = 0;
925 break;
926 }
927 ai->ai_addrlen = sizeof(struct sockaddr_in);
928 ai->ai_canonname = strdup(h->h_name);
930 sin = xmalloc(ai->ai_addrlen);
931 memset(sin, 0, ai->ai_addrlen);
932 sin->sin_family = AF_INET;
933 if (service)
934 sin->sin_port = htons(atoi(service));
935 sin->sin_addr = *(struct in_addr *)h->h_addr;
936 ai->ai_addr = (struct sockaddr *)sin;
937 ai->ai_next = 0;
938 return 0;
939 }
941 static void WSAAPI freeaddrinfo_stub(struct addrinfo *res)
942 {
943 free(res->ai_canonname);
944 free(res->ai_addr);
945 free(res);
946 }
948 static int WSAAPI getnameinfo_stub(const struct sockaddr *sa, socklen_t salen,
949 char *host, DWORD hostlen,
950 char *serv, DWORD servlen, int flags)
951 {
952 const struct sockaddr_in *sin = (const struct sockaddr_in *)sa;
953 if (sa->sa_family != AF_INET)
954 return EAI_FAMILY;
955 if (!host && !serv)
956 return EAI_NONAME;
958 if (host && hostlen > 0) {
959 struct hostent *ent = NULL;
960 if (!(flags & NI_NUMERICHOST))
961 ent = gethostbyaddr((const char *)&sin->sin_addr,
962 sizeof(sin->sin_addr), AF_INET);
964 if (ent)
965 snprintf(host, hostlen, "%s", ent->h_name);
966 else if (flags & NI_NAMEREQD)
967 return EAI_NONAME;
968 else
969 snprintf(host, hostlen, "%s", inet_ntoa(sin->sin_addr));
970 }
972 if (serv && servlen > 0) {
973 struct servent *ent = NULL;
974 if (!(flags & NI_NUMERICSERV))
975 ent = getservbyport(sin->sin_port,
976 flags & NI_DGRAM ? "udp" : "tcp");
978 if (ent)
979 snprintf(serv, servlen, "%s", ent->s_name);
980 else
981 snprintf(serv, servlen, "%d", ntohs(sin->sin_port));
982 }
984 return 0;
985 }
987 static HMODULE ipv6_dll = NULL;
988 static void (WSAAPI *ipv6_freeaddrinfo)(struct addrinfo *res);
989 static int (WSAAPI *ipv6_getaddrinfo)(const char *node, const char *service,
990 const struct addrinfo *hints,
991 struct addrinfo **res);
992 static int (WSAAPI *ipv6_getnameinfo)(const struct sockaddr *sa, socklen_t salen,
993 char *host, DWORD hostlen,
994 char *serv, DWORD servlen, int flags);
995 /*
996 * gai_strerror is an inline function in the ws2tcpip.h header, so we
997 * don't need to try to load that one dynamically.
998 */
1000 static void socket_cleanup(void)
1001 {
1002 WSACleanup();
1003 if (ipv6_dll)
1004 FreeLibrary(ipv6_dll);
1005 ipv6_dll = NULL;
1006 ipv6_freeaddrinfo = freeaddrinfo_stub;
1007 ipv6_getaddrinfo = getaddrinfo_stub;
1008 ipv6_getnameinfo = getnameinfo_stub;
1009 }
1011 static void ensure_socket_initialization(void)
1012 {
1013 WSADATA wsa;
1014 static int initialized = 0;
1015 const char *libraries[] = { "ws2_32.dll", "wship6.dll", NULL };
1016 const char **name;
1018 if (initialized)
1019 return;
1021 if (WSAStartup(MAKEWORD(2,2), &wsa))
1022 die("unable to initialize winsock subsystem, error %d",
1023 WSAGetLastError());
1025 for (name = libraries; *name; name++) {
1026 ipv6_dll = LoadLibrary(*name);
1027 if (!ipv6_dll)
1028 continue;
1030 ipv6_freeaddrinfo = (void (WSAAPI *)(struct addrinfo *))
1031 GetProcAddress(ipv6_dll, "freeaddrinfo");
1032 ipv6_getaddrinfo = (int (WSAAPI *)(const char *, const char *,
1033 const struct addrinfo *,
1034 struct addrinfo **))
1035 GetProcAddress(ipv6_dll, "getaddrinfo");
1036 ipv6_getnameinfo = (int (WSAAPI *)(const struct sockaddr *,
1037 socklen_t, char *, DWORD,
1038 char *, DWORD, int))
1039 GetProcAddress(ipv6_dll, "getnameinfo");
1040 if (!ipv6_freeaddrinfo || !ipv6_getaddrinfo || !ipv6_getnameinfo) {
1041 FreeLibrary(ipv6_dll);
1042 ipv6_dll = NULL;
1043 } else
1044 break;
1045 }
1046 if (!ipv6_freeaddrinfo || !ipv6_getaddrinfo || !ipv6_getnameinfo) {
1047 ipv6_freeaddrinfo = freeaddrinfo_stub;
1048 ipv6_getaddrinfo = getaddrinfo_stub;
1049 ipv6_getnameinfo = getnameinfo_stub;
1050 }
1052 atexit(socket_cleanup);
1053 initialized = 1;
1054 }
1056 #undef gethostbyname
1057 struct hostent *mingw_gethostbyname(const char *host)
1058 {
1059 ensure_socket_initialization();
1060 return gethostbyname(host);
1061 }
1063 void mingw_freeaddrinfo(struct addrinfo *res)
1064 {
1065 ipv6_freeaddrinfo(res);
1066 }
1068 int mingw_getaddrinfo(const char *node, const char *service,
1069 const struct addrinfo *hints, struct addrinfo **res)
1070 {
1071 ensure_socket_initialization();
1072 return ipv6_getaddrinfo(node, service, hints, res);
1073 }
1075 int mingw_getnameinfo(const struct sockaddr *sa, socklen_t salen,
1076 char *host, DWORD hostlen, char *serv, DWORD servlen,
1077 int flags)
1078 {
1079 ensure_socket_initialization();
1080 return ipv6_getnameinfo(sa, salen, host, hostlen, serv, servlen, flags);
1081 }
1083 int mingw_socket(int domain, int type, int protocol)
1084 {
1085 int sockfd;
1086 SOCKET s = WSASocket(domain, type, protocol, NULL, 0, 0);
1087 if (s == INVALID_SOCKET) {
1088 /*
1089 * WSAGetLastError() values are regular BSD error codes
1090 * biased by WSABASEERR.
1091 * However, strerror() does not know about networking
1092 * specific errors, which are values beginning at 38 or so.
1093 * Therefore, we choose to leave the biased error code
1094 * in errno so that _if_ someone looks up the code somewhere,
1095 * then it is at least the number that are usually listed.
1096 */
1097 errno = WSAGetLastError();
1098 return -1;
1099 }
1100 /* convert into a file descriptor */
1101 if ((sockfd = _open_osfhandle(s, O_RDWR|O_BINARY)) < 0) {
1102 closesocket(s);
1103 return error("unable to make a socket file descriptor: %s",
1104 strerror(errno));
1105 }
1106 return sockfd;
1107 }
1109 #undef connect
1110 int mingw_connect(int sockfd, struct sockaddr *sa, size_t sz)
1111 {
1112 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
1113 return connect(s, sa, sz);
1114 }
1116 #undef rename
1117 int mingw_rename(const char *pold, const char *pnew)
1118 {
1119 DWORD attrs, gle;
1120 int tries = 0;
1121 static const int delay[] = { 0, 1, 10, 20, 40 };
1123 /*
1124 * Try native rename() first to get errno right.
1125 * It is based on MoveFile(), which cannot overwrite existing files.
1126 */
1127 if (!rename(pold, pnew))
1128 return 0;
1129 if (errno != EEXIST)
1130 return -1;
1131 repeat:
1132 if (MoveFileEx(pold, pnew, MOVEFILE_REPLACE_EXISTING))
1133 return 0;
1134 /* TODO: translate more errors */
1135 gle = GetLastError();
1136 if (gle == ERROR_ACCESS_DENIED &&
1137 (attrs = GetFileAttributes(pnew)) != INVALID_FILE_ATTRIBUTES) {
1138 if (attrs & FILE_ATTRIBUTE_DIRECTORY) {
1139 errno = EISDIR;
1140 return -1;
1141 }
1142 if ((attrs & FILE_ATTRIBUTE_READONLY) &&
1143 SetFileAttributes(pnew, attrs & ~FILE_ATTRIBUTE_READONLY)) {
1144 if (MoveFileEx(pold, pnew, MOVEFILE_REPLACE_EXISTING))
1145 return 0;
1146 gle = GetLastError();
1147 /* revert file attributes on failure */
1148 SetFileAttributes(pnew, attrs);
1149 }
1150 }
1151 if (tries < ARRAY_SIZE(delay) && gle == ERROR_ACCESS_DENIED) {
1152 /*
1153 * We assume that some other process had the source or
1154 * destination file open at the wrong moment and retry.
1155 * In order to give the other process a higher chance to
1156 * complete its operation, we give up our time slice now.
1157 * If we have to retry again, we do sleep a bit.
1158 */
1159 Sleep(delay[tries]);
1160 tries++;
1161 goto repeat;
1162 }
1163 errno = EACCES;
1164 return -1;
1165 }
1167 /*
1168 * Note that this doesn't return the actual pagesize, but
1169 * the allocation granularity. If future Windows specific git code
1170 * needs the real getpagesize function, we need to find another solution.
1171 */
1172 int mingw_getpagesize(void)
1173 {
1174 SYSTEM_INFO si;
1175 GetSystemInfo(&si);
1176 return si.dwAllocationGranularity;
1177 }
1179 struct passwd *getpwuid(int uid)
1180 {
1181 static char user_name[100];
1182 static struct passwd p;
1184 DWORD len = sizeof(user_name);
1185 if (!GetUserName(user_name, &len))
1186 return NULL;
1187 p.pw_name = user_name;
1188 p.pw_gecos = "unknown";
1189 p.pw_dir = NULL;
1190 return &p;
1191 }
1193 static HANDLE timer_event;
1194 static HANDLE timer_thread;
1195 static int timer_interval;
1196 static int one_shot;
1197 static sig_handler_t timer_fn = SIG_DFL;
1199 /* The timer works like this:
1200 * The thread, ticktack(), is a trivial routine that most of the time
1201 * only waits to receive the signal to terminate. The main thread tells
1202 * the thread to terminate by setting the timer_event to the signalled
1203 * state.
1204 * But ticktack() interrupts the wait state after the timer's interval
1205 * length to call the signal handler.
1206 */
1208 static unsigned __stdcall ticktack(void *dummy)
1209 {
1210 while (WaitForSingleObject(timer_event, timer_interval) == WAIT_TIMEOUT) {
1211 if (timer_fn == SIG_DFL)
1212 die("Alarm");
1213 if (timer_fn != SIG_IGN)
1214 timer_fn(SIGALRM);
1215 if (one_shot)
1216 break;
1217 }
1218 return 0;
1219 }
1221 static int start_timer_thread(void)
1222 {
1223 timer_event = CreateEvent(NULL, FALSE, FALSE, NULL);
1224 if (timer_event) {
1225 timer_thread = (HANDLE) _beginthreadex(NULL, 0, ticktack, NULL, 0, NULL);
1226 if (!timer_thread )
1227 return errno = ENOMEM,
1228 error("cannot start timer thread");
1229 } else
1230 return errno = ENOMEM,
1231 error("cannot allocate resources for timer");
1232 return 0;
1233 }
1235 static void stop_timer_thread(void)
1236 {
1237 if (timer_event)
1238 SetEvent(timer_event); /* tell thread to terminate */
1239 if (timer_thread) {
1240 int rc = WaitForSingleObject(timer_thread, 1000);
1241 if (rc == WAIT_TIMEOUT)
1242 error("timer thread did not terminate timely");
1243 else if (rc != WAIT_OBJECT_0)
1244 error("waiting for timer thread failed: %lu",
1245 GetLastError());
1246 CloseHandle(timer_thread);
1247 }
1248 if (timer_event)
1249 CloseHandle(timer_event);
1250 timer_event = NULL;
1251 timer_thread = NULL;
1252 }
1254 static inline int is_timeval_eq(const struct timeval *i1, const struct timeval *i2)
1255 {
1256 return i1->tv_sec == i2->tv_sec && i1->tv_usec == i2->tv_usec;
1257 }
1259 int setitimer(int type, struct itimerval *in, struct itimerval *out)
1260 {
1261 static const struct timeval zero;
1262 static int atexit_done;
1264 if (out != NULL)
1265 return errno = EINVAL,
1266 error("setitimer param 3 != NULL not implemented");
1267 if (!is_timeval_eq(&in->it_interval, &zero) &&
1268 !is_timeval_eq(&in->it_interval, &in->it_value))
1269 return errno = EINVAL,
1270 error("setitimer: it_interval must be zero or eq it_value");
1272 if (timer_thread)
1273 stop_timer_thread();
1275 if (is_timeval_eq(&in->it_value, &zero) &&
1276 is_timeval_eq(&in->it_interval, &zero))
1277 return 0;
1279 timer_interval = in->it_value.tv_sec * 1000 + in->it_value.tv_usec / 1000;
1280 one_shot = is_timeval_eq(&in->it_interval, &zero);
1281 if (!atexit_done) {
1282 atexit(stop_timer_thread);
1283 atexit_done = 1;
1284 }
1285 return start_timer_thread();
1286 }
1288 int sigaction(int sig, struct sigaction *in, struct sigaction *out)
1289 {
1290 if (sig != SIGALRM)
1291 return errno = EINVAL,
1292 error("sigaction only implemented for SIGALRM");
1293 if (out != NULL)
1294 return errno = EINVAL,
1295 error("sigaction: param 3 != NULL not implemented");
1297 timer_fn = in->sa_handler;
1298 return 0;
1299 }
1301 #undef signal
1302 sig_handler_t mingw_signal(int sig, sig_handler_t handler)
1303 {
1304 sig_handler_t old = timer_fn;
1305 if (sig != SIGALRM)
1306 return signal(sig, handler);
1307 timer_fn = handler;
1308 return old;
1309 }
1311 static const char *make_backslash_path(const char *path)
1312 {
1313 static char buf[PATH_MAX + 1];
1314 char *c;
1316 if (strlcpy(buf, path, PATH_MAX) >= PATH_MAX)
1317 die("Too long path: %.*s", 60, path);
1319 for (c = buf; *c; c++) {
1320 if (*c == '/')
1321 *c = '\\';
1322 }
1323 return buf;
1324 }
1326 void mingw_open_html(const char *unixpath)
1327 {
1328 const char *htmlpath = make_backslash_path(unixpath);
1329 typedef HINSTANCE (WINAPI *T)(HWND, const char *,
1330 const char *, const char *, const char *, INT);
1331 T ShellExecute;
1332 HMODULE shell32;
1334 shell32 = LoadLibrary("shell32.dll");
1335 if (!shell32)
1336 die("cannot load shell32.dll");
1337 ShellExecute = (T)GetProcAddress(shell32, "ShellExecuteA");
1338 if (!ShellExecute)
1339 die("cannot run browser");
1341 printf("Launching default browser to display HTML ...\n");
1342 ShellExecute(NULL, "open", htmlpath, NULL, "\\", 0);
1344 FreeLibrary(shell32);
1345 }
1347 int link(const char *oldpath, const char *newpath)
1348 {
1349 typedef BOOL (WINAPI *T)(const char*, const char*, LPSECURITY_ATTRIBUTES);
1350 static T create_hard_link = NULL;
1351 if (!create_hard_link) {
1352 create_hard_link = (T) GetProcAddress(
1353 GetModuleHandle("kernel32.dll"), "CreateHardLinkA");
1354 if (!create_hard_link)
1355 create_hard_link = (T)-1;
1356 }
1357 if (create_hard_link == (T)-1) {
1358 errno = ENOSYS;
1359 return -1;
1360 }
1361 if (!create_hard_link(newpath, oldpath, NULL)) {
1362 errno = err_win_to_posix(GetLastError());
1363 return -1;
1364 }
1365 return 0;
1366 }
1368 char *getpass(const char *prompt)
1369 {
1370 struct strbuf buf = STRBUF_INIT;
1372 fputs(prompt, stderr);
1373 for (;;) {
1374 char c = _getch();
1375 if (c == '\r' || c == '\n')
1376 break;
1377 strbuf_addch(&buf, c);
1378 }
1379 fputs("\n", stderr);
1380 return strbuf_detach(&buf, NULL);
1381 }
1383 #ifndef NO_MINGW_REPLACE_READDIR
1384 /* MinGW readdir implementation to avoid extra lstats for Git */
1385 struct mingw_DIR
1386 {
1387 struct _finddata_t dd_dta; /* disk transfer area for this dir */
1388 struct mingw_dirent dd_dir; /* Our own implementation, including d_type */
1389 long dd_handle; /* _findnext handle */
1390 int dd_stat; /* 0 = next entry to read is first entry, -1 = off the end, positive = 0 based index of next entry */
1391 char dd_name[1]; /* given path for dir with search pattern (struct is extended) */
1392 };
1394 struct dirent *mingw_readdir(DIR *dir)
1395 {
1396 WIN32_FIND_DATAA buf;
1397 HANDLE handle;
1398 struct mingw_DIR *mdir = (struct mingw_DIR*)dir;
1400 if (!dir->dd_handle) {
1401 errno = EBADF; /* No set_errno for mingw */
1402 return NULL;
1403 }
1405 if (dir->dd_handle == (long)INVALID_HANDLE_VALUE && dir->dd_stat == 0)
1406 {
1407 DWORD lasterr;
1408 handle = FindFirstFileA(dir->dd_name, &buf);
1409 lasterr = GetLastError();
1410 dir->dd_handle = (long)handle;
1411 if (handle == INVALID_HANDLE_VALUE && (lasterr != ERROR_NO_MORE_FILES)) {
1412 errno = err_win_to_posix(lasterr);
1413 return NULL;
1414 }
1415 } else if (dir->dd_handle == (long)INVALID_HANDLE_VALUE) {
1416 return NULL;
1417 } else if (!FindNextFileA((HANDLE)dir->dd_handle, &buf)) {
1418 DWORD lasterr = GetLastError();
1419 FindClose((HANDLE)dir->dd_handle);
1420 dir->dd_handle = (long)INVALID_HANDLE_VALUE;
1421 /* POSIX says you shouldn't set errno when readdir can't
1422 find any more files; so, if another error we leave it set. */
1423 if (lasterr != ERROR_NO_MORE_FILES)
1424 errno = err_win_to_posix(lasterr);
1425 return NULL;
1426 }
1428 /* We get here if `buf' contains valid data. */
1429 strcpy(dir->dd_dir.d_name, buf.cFileName);
1430 ++dir->dd_stat;
1432 /* Set file type, based on WIN32_FIND_DATA */
1433 mdir->dd_dir.d_type = 0;
1434 if (buf.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)
1435 mdir->dd_dir.d_type |= DT_DIR;
1436 else
1437 mdir->dd_dir.d_type |= DT_REG;
1439 return (struct dirent*)&dir->dd_dir;
1440 }
1441 #endif // !NO_MINGW_REPLACE_READDIR