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win32: use our own dirent.h
[thirdparty/git.git] / compat / mingw.c
CommitLineData
f4626df5 1#include "../git-compat-util.h"
444dc903 2#include "win32.h"
28a559c0 3#include <conio.h>
7e5d7768 4#include "../strbuf.h"
f4626df5 5
44626dc7 6int err_win_to_posix(DWORD winerr)
b3debd2b
PK		 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}
118
3e4a1ba0
JS		 119#undef open
120int mingw_open (const char *filename, int oflags, ...)
121{
122 va_list args;
123 unsigned mode;
0d30ad71
FL		 124 int fd;
125
3e4a1ba0
JS		 126 va_start(args, oflags);
127 mode = va_arg(args, int);
128 va_end(args);
129
1a404209 130 if (filename && !strcmp(filename, "/dev/null"))
3e4a1ba0 131 filename = "nul";
0d30ad71
FL		 132
133 fd = open(filename, oflags, mode);
134
3e4a1ba0
JS		 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}
142
c8b29645
RS		 143#undef write
144ssize_t mingw_write(int fd, const void *buf, size_t count)
145{
146 /*
147 * While write() calls to a file on a local disk are translated
148 * into WriteFile() calls with a maximum size of 64KB on Windows
149 * XP and 256KB on Vista, no such cap is placed on writes to
150 * files over the network on Windows XP. Unfortunately, there
151 * seems to be a limit of 32MB-28KB on X64 and 64MB-32KB on x86;
152 * bigger writes fail on Windows XP.
153 * So we cap to a nice 31MB here to avoid write failures over
154 * the net without changing the number of WriteFile() calls in
155 * the local case.
156 */
157 return write(fd, buf, min(count, 31 * 1024 * 1024));
158}
159
3fdcdbdf
JS		 160#undef fopen
161FILE *mingw_fopen (const char *filename, const char *otype)
162{
1a404209 163 if (filename && !strcmp(filename, "/dev/null"))
3fdcdbdf
JS		 164 filename = "nul";
165 return fopen(filename, otype);
166}
167
168#undef freopen
169FILE *mingw_freopen (const char *filename, const char *otype, FILE *stream)
170{
171 if (filename && !strcmp(filename, "/dev/null"))
172 filename = "nul";
173 return freopen(filename, otype, stream);
174}
175
a6d15bc3
JS		 176/*
177 * The unit of FILETIME is 100-nanoseconds since January 1, 1601, UTC.
178 * Returns the 100-nanoseconds ("hekto nanoseconds") since the epoch.
179 */
180static inline long long filetime_to_hnsec(const FILETIME *ft)
5411bdc4
MSO		 181{
182 long long winTime = ((long long)ft->dwHighDateTime << 32) + ft->dwLowDateTime;
a6d15bc3
JS		 183 /* Windows to Unix Epoch conversion */
184 return winTime - 116444736000000000LL;
185}
186
187static inline time_t filetime_to_time_t(const FILETIME *ft)
188{
189 return (time_t)(filetime_to_hnsec(ft) / 10000000);
5411bdc4
MSO		 190}
191
5411bdc4
MSO		 192/* We keep the do_lstat code in a separate function to avoid recursion.
193 * When a path ends with a slash, the stat will fail with ENOENT. In
194 * this case, we strip the trailing slashes and stat again.
9b9784ca
PT		 195 *
196 * If follow is true then act like stat() and report on the link
197 * target. Otherwise report on the link itself.
5411bdc4 198 */
9b9784ca 199static int do_lstat(int follow, const char *file_name, struct stat *buf)
5411bdc4
MSO		 200{
201 WIN32_FILE_ATTRIBUTE_DATA fdata;
202
444dc903 203 if (!(errno = get_file_attr(file_name, &fdata))) {
5411bdc4
MSO		 204 buf->st_ino = 0;
205 buf->st_gid = 0;
206 buf->st_uid = 0;
180964f0 207 buf->st_nlink = 1;
444dc903 208 buf->st_mode = file_attr_to_st_mode(fdata.dwFileAttributes);
1d4e4cd4
JS		 209 buf->st_size = fdata.nFileSizeLow |
210 (((off_t)fdata.nFileSizeHigh)<<32);
8252df62 211 buf->st_dev = buf->st_rdev = 0; /* not used by Git */
5411bdc4
MSO		 212 buf->st_atime = filetime_to_time_t(&(fdata.ftLastAccessTime));
213 buf->st_mtime = filetime_to_time_t(&(fdata.ftLastWriteTime));
214 buf->st_ctime = filetime_to_time_t(&(fdata.ftCreationTime));
9b9784ca
PT		 215 if (fdata.dwFileAttributes & FILE_ATTRIBUTE_REPARSE_POINT) {
216 WIN32_FIND_DATAA findbuf;
217 HANDLE handle = FindFirstFileA(file_name, &findbuf);
218 if (handle != INVALID_HANDLE_VALUE) {
219 if ((findbuf.dwFileAttributes & FILE_ATTRIBUTE_REPARSE_POINT) &&
220 (findbuf.dwReserved0 == IO_REPARSE_TAG_SYMLINK)) {
221 if (follow) {
222 char buffer[MAXIMUM_REPARSE_DATA_BUFFER_SIZE];
223 buf->st_size = readlink(file_name, buffer, MAXIMUM_REPARSE_DATA_BUFFER_SIZE);
224 } else {
225 buf->st_mode = S_IFLNK;
226 }
227 buf->st_mode |= S_IREAD;
228 if (!(findbuf.dwFileAttributes & FILE_ATTRIBUTE_READONLY))
229 buf->st_mode |= S_IWRITE;
230 }
231 FindClose(handle);
232 }
233 }
5411bdc4
MSO		 234 return 0;
235 }
5411bdc4
MSO		 236 return -1;
237}
238
239/* We provide our own lstat/fstat functions, since the provided
240 * lstat/fstat functions are so slow. These stat functions are
241 * tailored for Git's usage (read: fast), and are not meant to be
242 * complete. Note that Git stat()s are redirected to mingw_lstat()
243 * too, since Windows doesn't really handle symlinks that well.
244 */
9b9784ca 245static int do_stat_internal(int follow, const char *file_name, struct stat *buf)
5411bdc4
MSO		 246{
247 int namelen;
248 static char alt_name[PATH_MAX];
249
9b9784ca 250 if (!do_lstat(follow, file_name, buf))
5411bdc4
MSO		 251 return 0;
252
253 /* if file_name ended in a '/', Windows returned ENOENT;
254 * try again without trailing slashes
255 */
256 if (errno != ENOENT)
257 return -1;
258
259 namelen = strlen(file_name);
260 if (namelen && file_name[namelen-1] != '/')
261 return -1;
262 while (namelen && file_name[namelen-1] == '/')
263 --namelen;
264 if (!namelen || namelen >= PATH_MAX)
265 return -1;
266
267 memcpy(alt_name, file_name, namelen);
268 alt_name[namelen] = 0;
9b9784ca
PT		 269 return do_lstat(follow, alt_name, buf);
270}
271
272int mingw_lstat(const char *file_name, struct stat *buf)
273{
274 return do_stat_internal(0, file_name, buf);
275}
276int mingw_stat(const char *file_name, struct stat *buf)
277{
278 return do_stat_internal(1, file_name, buf);
5411bdc4
MSO		 279}
280
281#undef fstat
180964f0 282int mingw_fstat(int fd, struct stat *buf)
5411bdc4
MSO		 283{
284 HANDLE fh = (HANDLE)_get_osfhandle(fd);
285 BY_HANDLE_FILE_INFORMATION fdata;
286
287 if (fh == INVALID_HANDLE_VALUE) {
288 errno = EBADF;
289 return -1;
290 }
291 /* direct non-file handles to MS's fstat() */
180964f0 292 if (GetFileType(fh) != FILE_TYPE_DISK)
1d4e4cd4 293 return _fstati64(fd, buf);
5411bdc4
MSO		 294
295 if (GetFileInformationByHandle(fh, &fdata)) {
5411bdc4
MSO		 296 buf->st_ino = 0;
297 buf->st_gid = 0;
298 buf->st_uid = 0;
180964f0 299 buf->st_nlink = 1;
444dc903 300 buf->st_mode = file_attr_to_st_mode(fdata.dwFileAttributes);
1d4e4cd4
JS		 301 buf->st_size = fdata.nFileSizeLow |
302 (((off_t)fdata.nFileSizeHigh)<<32);
8252df62 303 buf->st_dev = buf->st_rdev = 0; /* not used by Git */
5411bdc4
MSO		 304 buf->st_atime = filetime_to_time_t(&(fdata.ftLastAccessTime));
305 buf->st_mtime = filetime_to_time_t(&(fdata.ftLastWriteTime));
306 buf->st_ctime = filetime_to_time_t(&(fdata.ftCreationTime));
307 return 0;
308 }
309 errno = EBADF;
310 return -1;
311}
312
7c0ffa1c
JS		 313static inline void time_t_to_filetime(time_t t, FILETIME *ft)
314{
315 long long winTime = t * 10000000LL + 116444736000000000LL;
316 ft->dwLowDateTime = winTime;
317 ft->dwHighDateTime = winTime >> 32;
318}
319
320int mingw_utime (const char *file_name, const struct utimbuf *times)
321{
322 FILETIME mft, aft;
323 int fh, rc;
324
325 /* must have write permission */
852f098c
JS		 326 DWORD attrs = GetFileAttributes(file_name);
327 if (attrs != INVALID_FILE_ATTRIBUTES &&
328 (attrs & FILE_ATTRIBUTE_READONLY)) {
329 /* ignore errors here; open() will report them */
330 SetFileAttributes(file_name, attrs & ~FILE_ATTRIBUTE_READONLY);
331 }
332
333 if ((fh = open(file_name, O_RDWR | O_BINARY)) < 0) {
334 rc = -1;
335 goto revert_attrs;
336 }
7c0ffa1c 337
ded2d476
SG		 338 if (times) {
339 time_t_to_filetime(times->modtime, &mft);
340 time_t_to_filetime(times->actime, &aft);
341 } else {
342 GetSystemTimeAsFileTime(&mft);
343 aft = mft;
344 }
7c0ffa1c
JS		 345 if (!SetFileTime((HANDLE)_get_osfhandle(fh), NULL, &aft, &mft)) {
346 errno = EINVAL;
347 rc = -1;
348 } else
349 rc = 0;
350 close(fh);
852f098c
JS		 351
352revert_attrs:
353 if (attrs != INVALID_FILE_ATTRIBUTES &&
354 (attrs & FILE_ATTRIBUTE_READONLY)) {
355 /* ignore errors again */
356 SetFileAttributes(file_name, attrs);
357 }
7c0ffa1c
JS		 358 return rc;
359}
360
f4626df5
JS		 361unsigned int sleep (unsigned int seconds)
362{
363 Sleep(seconds*1000);
364 return 0;
365}
366
367int mkstemp(char *template)
368{
369 char *filename = mktemp(template);
370 if (filename == NULL)
371 return -1;
372 return open(filename, O_RDWR | O_CREAT, 0600);
373}
374
375int gettimeofday(struct timeval *tv, void *tz)
376{
a6d15bc3
JS		 377 FILETIME ft;
378 long long hnsec;
379
380 GetSystemTimeAsFileTime(&ft);
381 hnsec = filetime_to_hnsec(&ft);
382 tv->tv_sec = hnsec / 10000000;
383 tv->tv_usec = (hnsec % 10000000) / 10;
a42a0c2e 384 return 0;
f4626df5
JS		 385}
386
897bb8cb
JS		 387int pipe(int filedes[2])
388{
3e34d665 389 HANDLE h[2];
897bb8cb 390
3e34d665
JS		 391 /* this creates non-inheritable handles */
392 if (!CreatePipe(&h[0], &h[1], NULL, 8192)) {
393 errno = err_win_to_posix(GetLastError());
897bb8cb
JS		 394 return -1;
395 }
3e34d665
JS		 396 filedes[0] = _open_osfhandle((int)h[0], O_NOINHERIT);
397 if (filedes[0] < 0) {
897bb8cb
JS		 398 CloseHandle(h[0]);
399 CloseHandle(h[1]);
400 return -1;
401 }
3e34d665
JS		 402 filedes[1] = _open_osfhandle((int)h[1], O_NOINHERIT);
403 if (filedes[0] < 0) {
897bb8cb 404 close(filedes[0]);
897bb8cb
JS		 405 CloseHandle(h[1]);
406 return -1;
407 }
897bb8cb
JS		 408 return 0;
409}
410
f4626df5
JS		 411struct tm *gmtime_r(const time_t *timep, struct tm *result)
412{
413 /* gmtime() in MSVCRT.DLL is thread-safe, but not reentrant */
414 memcpy(result, gmtime(timep), sizeof(struct tm));
415 return result;
416}
417
418struct tm *localtime_r(const time_t *timep, struct tm *result)
419{
420 /* localtime() in MSVCRT.DLL is thread-safe, but not reentrant */
421 memcpy(result, localtime(timep), sizeof(struct tm));
422 return result;
423}
424
25fe217b
JS		 425#undef getcwd
426char *mingw_getcwd(char *pointer, int len)
427{
428 int i;
429 char *ret = getcwd(pointer, len);
430 if (!ret)
431 return ret;
432 for (i = 0; pointer[i]; i++)
433 if (pointer[i] == '\\')
434 pointer[i] = '/';
435 return ret;
436}
437
6fd6aec4
JS		 438#undef getenv
439char *mingw_getenv(const char *name)
440{
441 char *result = getenv(name);
442 if (!result && !strcmp(name, "TMPDIR")) {
443 /* on Windows it is TMP and TEMP */
444 result = getenv("TMP");
445 if (!result)
446 result = getenv("TEMP");
447 }
448 return result;
449}
450
7e5d7768
JS		 451/*
452 * See http://msdn2.microsoft.com/en-us/library/17w5ykft(vs.71).aspx
453 * (Parsing C++ Command-Line Arguments)
454 */
455static const char *quote_arg(const char *arg)
456{
457 /* count chars to quote */
458 int len = 0, n = 0;
459 int force_quotes = 0;
460 char *q, *d;
461 const char *p = arg;
462 if (!*p) force_quotes = 1;
463 while (*p) {
3aea1a5a 464 if (isspace(*p) || *p == '*' || *p == '?' || *p == '{' || *p == '\'')
7e5d7768
JS		 465 force_quotes = 1;
466 else if (*p == '"')
467 n++;
468 else if (*p == '\\') {
469 int count = 0;
470 while (*p == '\\') {
471 count++;
472 p++;
473 len++;
474 }
475 if (*p == '"')
476 n += count*2 + 1;
477 continue;
478 }
479 len++;
480 p++;
481 }
482 if (!force_quotes && n == 0)
483 return arg;
484
485 /* insert \ where necessary */
486 d = q = xmalloc(len+n+3);
487 *d++ = '"';
488 while (*arg) {
489 if (*arg == '"')
490 *d++ = '\\';
491 else if (*arg == '\\') {
492 int count = 0;
493 while (*arg == '\\') {
494 count++;
495 *d++ = *arg++;
496 }
497 if (*arg == '"') {
498 while (count-- > 0)
499 *d++ = '\\';
500 *d++ = '\\';
501 }
502 }
503 *d++ = *arg++;
504 }
505 *d++ = '"';
506 *d++ = 0;
507 return q;
508}
509
f1a4dfb8
JS		 510static const char *parse_interpreter(const char *cmd)
511{
512 static char buf[100];
513 char *p, *opt;
514 int n, fd;
515
516 /* don't even try a .exe */
517 n = strlen(cmd);
518 if (n >= 4 && !strcasecmp(cmd+n-4, ".exe"))
519 return NULL;
520
521 fd = open(cmd, O_RDONLY);
522 if (fd < 0)
523 return NULL;
524 n = read(fd, buf, sizeof(buf)-1);
525 close(fd);
526 if (n < 4) /* at least '#!/x' and not error */
527 return NULL;
528
529 if (buf[0] != '#' || buf[1] != '!')
530 return NULL;
531 buf[n] = '\0';
bedc4279
PH		 532 p = buf + strcspn(buf, "\r\n");
533 if (!*p)
f1a4dfb8
JS		 534 return NULL;
535
536 *p = '\0';
537 if (!(p = strrchr(buf+2, '/')) && !(p = strrchr(buf+2, '\\')))
538 return NULL;
539 /* strip options */
540 if ((opt = strchr(p+1, ' ')))
541 *opt = '\0';
542 return p+1;
543}
544
545/*
546 * Splits the PATH into parts.
547 */
548static char **get_path_split(void)
549{
550 char *p, **path, *envpath = getenv("PATH");
551 int i, n = 0;
552
553 if (!envpath || !*envpath)
554 return NULL;
555
556 envpath = xstrdup(envpath);
557 p = envpath;
558 while (p) {
559 char *dir = p;
560 p = strchr(p, ';');
561 if (p) *p++ = '\0';
562 if (*dir) { /* not earlier, catches series of ; */
563 ++n;
564 }
565 }
566 if (!n)
567 return NULL;
568
4b25d091 569 path = xmalloc((n+1)*sizeof(char *));
f1a4dfb8
JS		 570 p = envpath;
571 i = 0;
572 do {
573 if (*p)
574 path[i++] = xstrdup(p);
575 p = p+strlen(p)+1;
576 } while (i < n);
577 path[i] = NULL;
578
579 free(envpath);
580
581 return path;
582}
583
584static void free_path_split(char **path)
585{
0d30ad71
FL		 586 char **p = path;
587
f1a4dfb8
JS		 588 if (!path)
589 return;
590
f1a4dfb8
JS		 591 while (*p)
592 free(*p++);
593 free(path);
594}
595
596/*
597 * exe_only means that we only want to detect .exe files, but not scripts
598 * (which do not have an extension)
599 */
600static char *lookup_prog(const char *dir, const char *cmd, int isexe, int exe_only)
601{
602 char path[MAX_PATH];
603 snprintf(path, sizeof(path), "%s/%s.exe", dir, cmd);
604
605 if (!isexe && access(path, F_OK) == 0)
606 return xstrdup(path);
607 path[strlen(path)-4] = '\0';
608 if ((!exe_only || isexe) && access(path, F_OK) == 0)
fe77b695
ER		 609 if (!(GetFileAttributes(path) & FILE_ATTRIBUTE_DIRECTORY))
610 return xstrdup(path);
f1a4dfb8
JS		 611 return NULL;
612}
613
614/*
22e5e58a 615 * Determines the absolute path of cmd using the split path in path.
f1a4dfb8
JS		 616 * If cmd contains a slash or backslash, no lookup is performed.
617 */
618static char *path_lookup(const char *cmd, char **path, int exe_only)
619{
620 char *prog = NULL;
621 int len = strlen(cmd);
622 int isexe = len >= 4 && !strcasecmp(cmd+len-4, ".exe");
623
624 if (strchr(cmd, '/') || strchr(cmd, '\\'))
625 prog = xstrdup(cmd);
626
627 while (!prog && *path)
628 prog = lookup_prog(*path++, cmd, isexe, exe_only);
629
630 return prog;
631}
632
7e5d7768
JS		 633static int env_compare(const void *a, const void *b)
634{
635 char *const *ea = a;
636 char *const *eb = b;
637 return strcasecmp(*ea, *eb);
638}
639
52de4db5
EFL		 640struct pinfo_t {
641 struct pinfo_t *next;
642 pid_t pid;
643 HANDLE proc;
644} pinfo_t;
645struct pinfo_t *pinfo = NULL;
646CRITICAL_SECTION pinfo_cs;
647
75301f90 648static pid_t mingw_spawnve_fd(const char *cmd, const char **argv, char **env,
f9a2743c 649 const char *dir,
75301f90 650 int prepend_cmd, int fhin, int fhout, int fherr)
7e5d7768
JS		 651{
652 STARTUPINFO si;
653 PROCESS_INFORMATION pi;
654 struct strbuf envblk, args;
655 unsigned flags;
656 BOOL ret;
657
658 /* Determine whether or not we are associated to a console */
659 HANDLE cons = CreateFile("CONOUT$", GENERIC_WRITE,
660 FILE_SHARE_WRITE, NULL, OPEN_EXISTING,
661 FILE_ATTRIBUTE_NORMAL, NULL);
662 if (cons == INVALID_HANDLE_VALUE) {
663 /* There is no console associated with this process.
664 * Since the child is a console process, Windows
665 * would normally create a console window. But
666 * since we'll be redirecting std streams, we do
667 * not need the console.
19fb896f
AG		 668 * It is necessary to use DETACHED_PROCESS
669 * instead of CREATE_NO_WINDOW to make ssh
670 * recognize that it has no console.
7e5d7768 671 */
19fb896f 672 flags = DETACHED_PROCESS;
7e5d7768
JS		 673 } else {
674 /* There is already a console. If we specified
19fb896f 675 * DETACHED_PROCESS here, too, Windows would
7e5d7768 676 * disassociate the child from the console.
19fb896f 677 * The same is true for CREATE_NO_WINDOW.
7e5d7768
JS		 678 * Go figure!
679 */
680 flags = 0;
681 CloseHandle(cons);
682 }
683 memset(&si, 0, sizeof(si));
684 si.cb = sizeof(si);
685 si.dwFlags = STARTF_USESTDHANDLES;
75301f90
JS		 686 si.hStdInput = (HANDLE) _get_osfhandle(fhin);
687 si.hStdOutput = (HANDLE) _get_osfhandle(fhout);
688 si.hStdError = (HANDLE) _get_osfhandle(fherr);
7e5d7768
JS		 689
690 /* concatenate argv, quoting args as we go */
691 strbuf_init(&args, 0);
692 if (prepend_cmd) {
693 char *quoted = (char *)quote_arg(cmd);
694 strbuf_addstr(&args, quoted);
695 if (quoted != cmd)
696 free(quoted);
697 }
698 for (; *argv; argv++) {
699 char *quoted = (char *)quote_arg(*argv);
700 if (*args.buf)
701 strbuf_addch(&args, ' ');
702 strbuf_addstr(&args, quoted);
703 if (quoted != *argv)
704 free(quoted);
705 }
706
707 if (env) {
708 int count = 0;
709 char **e, **sorted_env;
710
711 for (e = env; *e; e++)
712 count++;
713
714 /* environment must be sorted */
715 sorted_env = xmalloc(sizeof(*sorted_env) * (count + 1));
716 memcpy(sorted_env, env, sizeof(*sorted_env) * (count + 1));
717 qsort(sorted_env, count, sizeof(*sorted_env), env_compare);
718
719 strbuf_init(&envblk, 0);
720 for (e = sorted_env; *e; e++) {
721 strbuf_addstr(&envblk, *e);
722 strbuf_addch(&envblk, '\0');
723 }
724 free(sorted_env);
725 }
726
727 memset(&pi, 0, sizeof(pi));
728 ret = CreateProcess(cmd, args.buf, NULL, NULL, TRUE, flags,
f9a2743c 729 env ? envblk.buf : NULL, dir, &si, &pi);
7e5d7768
JS		 730
731 if (env)
732 strbuf_release(&envblk);
733 strbuf_release(&args);
734
735 if (!ret) {
736 errno = ENOENT;
737 return -1;
738 }
739 CloseHandle(pi.hThread);
52de4db5
EFL		 740
741 /*
742 * The process ID is the human-readable identifier of the process
743 * that we want to present in log and error messages. The handle
744 * is not useful for this purpose. But we cannot close it, either,
745 * because it is not possible to turn a process ID into a process
746 * handle after the process terminated.
747 * Keep the handle in a list for waitpid.
748 */
749 EnterCriticalSection(&pinfo_cs);
750 {
751 struct pinfo_t *info = xmalloc(sizeof(struct pinfo_t));
752 info->pid = pi.dwProcessId;
753 info->proc = pi.hProcess;
754 info->next = pinfo;
755 pinfo = info;
756 }
757 LeaveCriticalSection(&pinfo_cs);
758
759 return (pid_t)pi.dwProcessId;
7e5d7768
JS		 760}
761
75301f90
JS		 762static pid_t mingw_spawnve(const char *cmd, const char **argv, char **env,
763 int prepend_cmd)
764{
f9a2743c 765 return mingw_spawnve_fd(cmd, argv, env, NULL, prepend_cmd, 0, 1, 2);
75301f90
JS		 766}
767
768pid_t mingw_spawnvpe(const char *cmd, const char **argv, char **env,
f9a2743c 769 const char *dir,
75301f90 770 int fhin, int fhout, int fherr)
7e5d7768
JS		 771{
772 pid_t pid;
773 char **path = get_path_split();
774 char *prog = path_lookup(cmd, path, 0);
775
776 if (!prog) {
777 errno = ENOENT;
778 pid = -1;
779 }
780 else {
781 const char *interpr = parse_interpreter(prog);
782
783 if (interpr) {
784 const char *argv0 = argv[0];
785 char *iprog = path_lookup(interpr, path, 1);
786 argv[0] = prog;
787 if (!iprog) {
788 errno = ENOENT;
789 pid = -1;
790 }
791 else {
f9a2743c 792 pid = mingw_spawnve_fd(iprog, argv, env, dir, 1,
75301f90 793 fhin, fhout, fherr);
7e5d7768
JS		 794 free(iprog);
795 }
796 argv[0] = argv0;
797 }
798 else
f9a2743c 799 pid = mingw_spawnve_fd(prog, argv, env, dir, 0,
75301f90 800 fhin, fhout, fherr);
7e5d7768
JS		 801 free(prog);
802 }
803 free_path_split(path);
804 return pid;
805}
806
f1a4dfb8
JS		 807static int try_shell_exec(const char *cmd, char *const *argv, char **env)
808{
809 const char *interpr = parse_interpreter(cmd);
810 char **path;
811 char *prog;
812 int pid = 0;
813
814 if (!interpr)
815 return 0;
816 path = get_path_split();
817 prog = path_lookup(interpr, path, 1);
818 if (prog) {
819 int argc = 0;
820 const char **argv2;
821 while (argv[argc]) argc++;
7e5d7768
JS		 822 argv2 = xmalloc(sizeof(*argv) * (argc+1));
823 argv2[0] = (char *)cmd; /* full path to the script file */
824 memcpy(&argv2[1], &argv[1], sizeof(*argv) * argc);
825 pid = mingw_spawnve(prog, argv2, env, 1);
f1a4dfb8
JS		 826 if (pid >= 0) {
827 int status;
828 if (waitpid(pid, &status, 0) < 0)
829 status = 255;
830 exit(status);
831 }
832 pid = 1; /* indicate that we tried but failed */
833 free(prog);
834 free(argv2);
835 }
836 free_path_split(path);
837 return pid;
838}
839
840static void mingw_execve(const char *cmd, char *const *argv, char *const *env)
841{
842 /* check if git_command is a shell script */
843 if (!try_shell_exec(cmd, argv, (char **)env)) {
844 int pid, status;
845
7e5d7768 846 pid = mingw_spawnve(cmd, (const char **)argv, (char **)env, 0);
f1a4dfb8
JS		 847 if (pid < 0)
848 return;
849 if (waitpid(pid, &status, 0) < 0)
850 status = 255;
851 exit(status);
852 }
853}
854
855void mingw_execvp(const char *cmd, char *const *argv)
856{
857 char **path = get_path_split();
858 char *prog = path_lookup(cmd, path, 0);
859
860 if (prog) {
861 mingw_execve(prog, argv, environ);
862 free(prog);
863 } else
864 errno = ENOENT;
865
866 free_path_split(path);
867}
868
5debf9a5
ES		 869void mingw_execv(const char *cmd, char *const *argv)
870{
871 mingw_execve(cmd, argv, environ);
872}
873
82fc07b7
EFL		 874int mingw_kill(pid_t pid, int sig)
875{
876 if (pid > 0 && sig == SIGTERM) {
877 HANDLE h = OpenProcess(PROCESS_TERMINATE, FALSE, pid);
878
879 if (TerminateProcess(h, -1)) {
880 CloseHandle(h);
881 return 0;
882 }
883
884 errno = err_win_to_posix(GetLastError());
885 CloseHandle(h);
886 return -1;
887 }
888
889 errno = EINVAL;
890 return -1;
891}
892
2affea41 893static char **copy_environ(void)
ba26f296
JS		 894{
895 char **env;
896 int i = 0;
897 while (environ[i])
898 i++;
899 env = xmalloc((i+1)*sizeof(*env));
900 for (i = 0; environ[i]; i++)
901 env[i] = xstrdup(environ[i]);
902 env[i] = NULL;
903 return env;
904}
905
906void free_environ(char **env)
907{
908 int i;
909 for (i = 0; env[i]; i++)
910 free(env[i]);
911 free(env);
912}
913
914static int lookup_env(char **env, const char *name, size_t nmln)
915{
916 int i;
917
918 for (i = 0; env[i]; i++) {
919 if (0 == strncmp(env[i], name, nmln)
920 && '=' == env[i][nmln])
921 /* matches */
922 return i;
923 }
924 return -1;
925}
926
927/*
928 * If name contains '=', then sets the variable, otherwise it unsets it
929 */
2affea41 930static char **env_setenv(char **env, const char *name)
ba26f296
JS		 931{
932 char *eq = strchrnul(name, '=');
933 int i = lookup_env(env, name, eq-name);
934
935 if (i < 0) {
936 if (*eq) {
937 for (i = 0; env[i]; i++)
938 ;
939 env = xrealloc(env, (i+2)*sizeof(*env));
940 env[i] = xstrdup(name);
941 env[i+1] = NULL;
942 }
943 }
944 else {
945 free(env[i]);
946 if (*eq)
947 env[i] = xstrdup(name);
948 else
949 for (; env[i]; i++)
950 env[i] = env[i+1];
951 }
952 return env;
953}
954
2affea41
JS		 955/*
956 * Copies global environ and adjusts variables as specified by vars.
957 */
958char **make_augmented_environ(const char *const *vars)
959{
960 char **env = copy_environ();
961
962 while (*vars)
963 env = env_setenv(env, *vars++);
964 return env;
965}
966
fe3b2b7b
MS		 967/*
968 * Note, this isn't a complete replacement for getaddrinfo. It assumes
969 * that service contains a numerical port, or that it it is null. It
970 * does a simple search using gethostbyname, and returns one IPv4 host
971 * if one was found.
972 */
973static int WSAAPI getaddrinfo_stub(const char *node, const char *service,
974 const struct addrinfo *hints,
975 struct addrinfo **res)
976{
cbefd2d6 977 struct hostent *h = NULL;
fe3b2b7b
MS		 978 struct addrinfo *ai;
979 struct sockaddr_in *sin;
980
cbefd2d6
MS		 981 if (node) {
982 h = gethostbyname(node);
983 if (!h)
984 return WSAGetLastError();
985 }
fe3b2b7b
MS		 986
987 ai = xmalloc(sizeof(struct addrinfo));
988 *res = ai;
989 ai->ai_flags = 0;
990 ai->ai_family = AF_INET;
cbefd2d6
MS		 991 ai->ai_socktype = hints ? hints->ai_socktype : 0;
992 switch (ai->ai_socktype) {
fe3b2b7b
MS		 993 case SOCK_STREAM:
994 ai->ai_protocol = IPPROTO_TCP;
995 break;
996 case SOCK_DGRAM:
997 ai->ai_protocol = IPPROTO_UDP;
998 break;
999 default:
1000 ai->ai_protocol = 0;
1001 break;
1002 }
1003 ai->ai_addrlen = sizeof(struct sockaddr_in);
cbefd2d6
MS		 1004 if (hints && (hints->ai_flags & AI_CANONNAME))
1005 ai->ai_canonname = h ? strdup(h->h_name) : NULL;
1006 else
1007 ai->ai_canonname = NULL;
fe3b2b7b
MS		 1008
1009 sin = xmalloc(ai->ai_addrlen);
1010 memset(sin, 0, ai->ai_addrlen);
1011 sin->sin_family = AF_INET;
cbefd2d6
MS		 1012 /* Note: getaddrinfo is supposed to allow service to be a string,
1013 * which should be looked up using getservbyname. This is
1014 * currently not implemented */
fe3b2b7b
MS		 1015 if (service)
1016 sin->sin_port = htons(atoi(service));
cbefd2d6
MS		 1017 if (h)
1018 sin->sin_addr = *(struct in_addr *)h->h_addr;
1019 else if (hints && (hints->ai_flags & AI_PASSIVE))
1020 sin->sin_addr.s_addr = INADDR_ANY;
1021 else
1022 sin->sin_addr.s_addr = INADDR_LOOPBACK;
fe3b2b7b
MS		 1023 ai->ai_addr = (struct sockaddr *)sin;
1024 ai->ai_next = 0;
1025 return 0;
1026}
1027
1028static void WSAAPI freeaddrinfo_stub(struct addrinfo *res)
1029{
1030 free(res->ai_canonname);
1031 free(res->ai_addr);
1032 free(res);
1033}
1034
1035static int WSAAPI getnameinfo_stub(const struct sockaddr *sa, socklen_t salen,
1036 char *host, DWORD hostlen,
1037 char *serv, DWORD servlen, int flags)
1038{
1039 const struct sockaddr_in *sin = (const struct sockaddr_in *)sa;
1040 if (sa->sa_family != AF_INET)
1041 return EAI_FAMILY;
1042 if (!host && !serv)
1043 return EAI_NONAME;
1044
1045 if (host && hostlen > 0) {
1046 struct hostent *ent = NULL;
1047 if (!(flags & NI_NUMERICHOST))
1048 ent = gethostbyaddr((const char *)&sin->sin_addr,
1049 sizeof(sin->sin_addr), AF_INET);
1050
1051 if (ent)
1052 snprintf(host, hostlen, "%s", ent->h_name);
1053 else if (flags & NI_NAMEREQD)
1054 return EAI_NONAME;
1055 else
1056 snprintf(host, hostlen, "%s", inet_ntoa(sin->sin_addr));
1057 }
1058
1059 if (serv && servlen > 0) {
1060 struct servent *ent = NULL;
1061 if (!(flags & NI_NUMERICSERV))
1062 ent = getservbyport(sin->sin_port,
1063 flags & NI_DGRAM ? "udp" : "tcp");
1064
1065 if (ent)
1066 snprintf(serv, servlen, "%s", ent->s_name);
1067 else
1068 snprintf(serv, servlen, "%d", ntohs(sin->sin_port));
1069 }
1070
1071 return 0;
1072}
1073
1074static HMODULE ipv6_dll = NULL;
1075static void (WSAAPI *ipv6_freeaddrinfo)(struct addrinfo *res);
1076static int (WSAAPI *ipv6_getaddrinfo)(const char *node, const char *service,
1077 const struct addrinfo *hints,
1078 struct addrinfo **res);
1079static int (WSAAPI *ipv6_getnameinfo)(const struct sockaddr *sa, socklen_t salen,
1080 char *host, DWORD hostlen,
1081 char *serv, DWORD servlen, int flags);
1082/*
1083 * gai_strerror is an inline function in the ws2tcpip.h header, so we
1084 * don't need to try to load that one dynamically.
1085 */
1086
1087static void socket_cleanup(void)
1088{
1089 WSACleanup();
1090 if (ipv6_dll)
1091 FreeLibrary(ipv6_dll);
1092 ipv6_dll = NULL;
1093 ipv6_freeaddrinfo = freeaddrinfo_stub;
1094 ipv6_getaddrinfo = getaddrinfo_stub;
1095 ipv6_getnameinfo = getnameinfo_stub;
1096}
1097
b7cc9f82 1098static void ensure_socket_initialization(void)
746fb857
JS		 1099{
1100 WSADATA wsa;
b7cc9f82 1101 static int initialized = 0;
fe3b2b7b
MS		 1102 const char *libraries[] = { "ws2_32.dll", "wship6.dll", NULL };
1103 const char **name;
b7cc9f82
MS		 1104
1105 if (initialized)
1106 return;
746fb857
JS		 1107
1108 if (WSAStartup(MAKEWORD(2,2), &wsa))
1109 die("unable to initialize winsock subsystem, error %d",
1110 WSAGetLastError());
fe3b2b7b
MS		 1111
1112 for (name = libraries; *name; name++) {
1113 ipv6_dll = LoadLibrary(*name);
1114 if (!ipv6_dll)
1115 continue;
1116
1117 ipv6_freeaddrinfo = (void (WSAAPI *)(struct addrinfo *))
1118 GetProcAddress(ipv6_dll, "freeaddrinfo");
1119 ipv6_getaddrinfo = (int (WSAAPI *)(const char *, const char *,
1120 const struct addrinfo *,
1121 struct addrinfo **))
1122 GetProcAddress(ipv6_dll, "getaddrinfo");
1123 ipv6_getnameinfo = (int (WSAAPI *)(const struct sockaddr *,
1124 socklen_t, char *, DWORD,
1125 char *, DWORD, int))
1126 GetProcAddress(ipv6_dll, "getnameinfo");
1127 if (!ipv6_freeaddrinfo || !ipv6_getaddrinfo || !ipv6_getnameinfo) {
1128 FreeLibrary(ipv6_dll);
1129 ipv6_dll = NULL;
1130 } else
1131 break;
1132 }
1133 if (!ipv6_freeaddrinfo || !ipv6_getaddrinfo || !ipv6_getnameinfo) {
1134 ipv6_freeaddrinfo = freeaddrinfo_stub;
1135 ipv6_getaddrinfo = getaddrinfo_stub;
1136 ipv6_getnameinfo = getnameinfo_stub;
1137 }
1138
1139 atexit(socket_cleanup);
b7cc9f82
MS		 1140 initialized = 1;
1141}
1142
1143#undef gethostbyname
1144struct hostent *mingw_gethostbyname(const char *host)
1145{
1146 ensure_socket_initialization();
746fb857
JS		 1147 return gethostbyname(host);
1148}
1149
fe3b2b7b
MS		 1150void mingw_freeaddrinfo(struct addrinfo *res)
1151{
1152 ipv6_freeaddrinfo(res);
1153}
1154
1155int mingw_getaddrinfo(const char *node, const char *service,
1156 const struct addrinfo *hints, struct addrinfo **res)
1157{
1158 ensure_socket_initialization();
1159 return ipv6_getaddrinfo(node, service, hints, res);
1160}
1161
1162int mingw_getnameinfo(const struct sockaddr *sa, socklen_t salen,
1163 char *host, DWORD hostlen, char *serv, DWORD servlen,
1164 int flags)
1165{
1166 ensure_socket_initialization();
1167 return ipv6_getnameinfo(sa, salen, host, hostlen, serv, servlen, flags);
1168}
1169
746fb857
JS		 1170int mingw_socket(int domain, int type, int protocol)
1171{
1172 int sockfd;
772991af
MP		 1173 SOCKET s;
1174
1175 ensure_socket_initialization();
1176 s = WSASocket(domain, type, protocol, NULL, 0, 0);
746fb857
JS		 1177 if (s == INVALID_SOCKET) {
1178 /*
1179 * WSAGetLastError() values are regular BSD error codes
1180 * biased by WSABASEERR.
1181 * However, strerror() does not know about networking
1182 * specific errors, which are values beginning at 38 or so.
1183 * Therefore, we choose to leave the biased error code
1184 * in errno so that _if_ someone looks up the code somewhere,
1185 * then it is at least the number that are usually listed.
1186 */
1187 errno = WSAGetLastError();
1188 return -1;
1189 }
1190 /* convert into a file descriptor */
1191 if ((sockfd = _open_osfhandle(s, O_RDWR|O_BINARY)) < 0) {
1192 closesocket(s);
1193 return error("unable to make a socket file descriptor: %s",
1194 strerror(errno));
1195 }
1196 return sockfd;
1197}
1198
1199#undef connect
1200int mingw_connect(int sockfd, struct sockaddr *sa, size_t sz)
1201{
1202 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
1203 return connect(s, sa, sz);
1204}
1205
772991af
MP		 1206#undef bind
1207int mingw_bind(int sockfd, struct sockaddr *sa, size_t sz)
1208{
1209 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
1210 return bind(s, sa, sz);
1211}
1212
1213#undef setsockopt
1214int mingw_setsockopt(int sockfd, int lvl, int optname, void *optval, int optlen)
1215{
1216 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
1217 return setsockopt(s, lvl, optname, (const char*)optval, optlen);
1218}
1219
1220#undef listen
1221int mingw_listen(int sockfd, int backlog)
1222{
1223 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
1224 return listen(s, backlog);
1225}
1226
1227#undef accept
1228int mingw_accept(int sockfd1, struct sockaddr *sa, socklen_t *sz)
1229{
1230 int sockfd2;
1231
1232 SOCKET s1 = (SOCKET)_get_osfhandle(sockfd1);
1233 SOCKET s2 = accept(s1, sa, sz);
1234
1235 /* convert into a file descriptor */
1236 if ((sockfd2 = _open_osfhandle(s2, O_RDWR|O_BINARY)) < 0) {
1237 int err = errno;
1238 closesocket(s2);
1239 return error("unable to make a socket file descriptor: %s",
1240 strerror(err));
1241 }
1242 return sockfd2;
1243}
1244
ea9e98c3
JS		 1245#undef rename
1246int mingw_rename(const char *pold, const char *pnew)
1247{
6ac6f878
JS		 1248 DWORD attrs, gle;
1249 int tries = 0;
1250 static const int delay[] = { 0, 1, 10, 20, 40 };
632f7017 1251
ea9e98c3
JS		 1252 /*
1253 * Try native rename() first to get errno right.
1254 * It is based on MoveFile(), which cannot overwrite existing files.
1255 */
1256 if (!rename(pold, pnew))
1257 return 0;
1258 if (errno != EEXIST)
1259 return -1;
6ac6f878 1260repeat:
ea9e98c3
JS		 1261 if (MoveFileEx(pold, pnew, MOVEFILE_REPLACE_EXISTING))
1262 return 0;
1263 /* TODO: translate more errors */
6ac6f878
JS		 1264 gle = GetLastError();
1265 if (gle == ERROR_ACCESS_DENIED &&
632f7017
JS		 1266 (attrs = GetFileAttributes(pnew)) != INVALID_FILE_ATTRIBUTES) {
1267 if (attrs & FILE_ATTRIBUTE_DIRECTORY) {
ea9e98c3
JS		 1268 errno = EISDIR;
1269 return -1;
1270 }
632f7017
JS		 1271 if ((attrs & FILE_ATTRIBUTE_READONLY) &&
1272 SetFileAttributes(pnew, attrs & ~FILE_ATTRIBUTE_READONLY)) {
1273 if (MoveFileEx(pold, pnew, MOVEFILE_REPLACE_EXISTING))
1274 return 0;
6ac6f878 1275 gle = GetLastError();
632f7017
JS		 1276 /* revert file attributes on failure */
1277 SetFileAttributes(pnew, attrs);
1278 }
ea9e98c3 1279 }
6ac6f878
JS		 1280 if (tries < ARRAY_SIZE(delay) && gle == ERROR_ACCESS_DENIED) {
1281 /*
1282 * We assume that some other process had the source or
1283 * destination file open at the wrong moment and retry.
1284 * In order to give the other process a higher chance to
1285 * complete its operation, we give up our time slice now.
1286 * If we have to retry again, we do sleep a bit.
1287 */
1288 Sleep(delay[tries]);
1289 tries++;
1290 goto repeat;
1291 }
ea9e98c3
JS		 1292 errno = EACCES;
1293 return -1;
1294}
1295
b1b95204
RJ		 1296/*
1297 * Note that this doesn't return the actual pagesize, but
1298 * the allocation granularity. If future Windows specific git code
1299 * needs the real getpagesize function, we need to find another solution.
1300 */
1301int mingw_getpagesize(void)
1302{
1303 SYSTEM_INFO si;
1304 GetSystemInfo(&si);
1305 return si.dwAllocationGranularity;
1306}
1307
f4626df5
JS		 1308struct passwd *getpwuid(int uid)
1309{
f7597aca 1310 static char user_name[100];
f4626df5 1311 static struct passwd p;
f7597aca
JS		 1312
1313 DWORD len = sizeof(user_name);
1314 if (!GetUserName(user_name, &len))
1315 return NULL;
1316 p.pw_name = user_name;
1317 p.pw_gecos = "unknown";
1318 p.pw_dir = NULL;
f4626df5
JS		 1319 return &p;
1320}
1321
6072fc31
JS		 1322static HANDLE timer_event;
1323static HANDLE timer_thread;
1324static int timer_interval;
1325static int one_shot;
1326static sig_handler_t timer_fn = SIG_DFL;
1327
1328/* The timer works like this:
1329 * The thread, ticktack(), is a trivial routine that most of the time
1330 * only waits to receive the signal to terminate. The main thread tells
1331 * the thread to terminate by setting the timer_event to the signalled
1332 * state.
1333 * But ticktack() interrupts the wait state after the timer's interval
1334 * length to call the signal handler.
1335 */
1336
d7fa500f 1337static unsigned __stdcall ticktack(void *dummy)
6072fc31
JS		 1338{
1339 while (WaitForSingleObject(timer_event, timer_interval) == WAIT_TIMEOUT) {
1340 if (timer_fn == SIG_DFL)
1341 die("Alarm");
1342 if (timer_fn != SIG_IGN)
1343 timer_fn(SIGALRM);
1344 if (one_shot)
1345 break;
1346 }
1347 return 0;
1348}
1349
1350static int start_timer_thread(void)
1351{
1352 timer_event = CreateEvent(NULL, FALSE, FALSE, NULL);
1353 if (timer_event) {
1354 timer_thread = (HANDLE) _beginthreadex(NULL, 0, ticktack, NULL, 0, NULL);
1355 if (!timer_thread )
1356 return errno = ENOMEM,
1357 error("cannot start timer thread");
1358 } else
1359 return errno = ENOMEM,
1360 error("cannot allocate resources for timer");
1361 return 0;
1362}
1363
1364static void stop_timer_thread(void)
1365{
1366 if (timer_event)
1367 SetEvent(timer_event); /* tell thread to terminate */
1368 if (timer_thread) {
1369 int rc = WaitForSingleObject(timer_thread, 1000);
1370 if (rc == WAIT_TIMEOUT)
1371 error("timer thread did not terminate timely");
1372 else if (rc != WAIT_OBJECT_0)
1373 error("waiting for timer thread failed: %lu",
1374 GetLastError());
1375 CloseHandle(timer_thread);
1376 }
1377 if (timer_event)
1378 CloseHandle(timer_event);
1379 timer_event = NULL;
1380 timer_thread = NULL;
1381}
1382
1383static inline int is_timeval_eq(const struct timeval *i1, const struct timeval *i2)
1384{
1385 return i1->tv_sec == i2->tv_sec && i1->tv_usec == i2->tv_usec;
1386}
1387
f4626df5
JS		 1388int setitimer(int type, struct itimerval *in, struct itimerval *out)
1389{
6072fc31
JS		 1390 static const struct timeval zero;
1391 static int atexit_done;
1392
1393 if (out != NULL)
1394 return errno = EINVAL,
1395 error("setitimer param 3 != NULL not implemented");
1396 if (!is_timeval_eq(&in->it_interval, &zero) &&
1397 !is_timeval_eq(&in->it_interval, &in->it_value))
1398 return errno = EINVAL,
1399 error("setitimer: it_interval must be zero or eq it_value");
1400
1401 if (timer_thread)
1402 stop_timer_thread();
1403
1404 if (is_timeval_eq(&in->it_value, &zero) &&
1405 is_timeval_eq(&in->it_interval, &zero))
1406 return 0;
1407
1408 timer_interval = in->it_value.tv_sec * 1000 + in->it_value.tv_usec / 1000;
1409 one_shot = is_timeval_eq(&in->it_interval, &zero);
1410 if (!atexit_done) {
1411 atexit(stop_timer_thread);
1412 atexit_done = 1;
1413 }
1414 return start_timer_thread();
f4626df5
JS		 1415}
1416
1417int sigaction(int sig, struct sigaction *in, struct sigaction *out)
1418{
6072fc31
JS		 1419 if (sig != SIGALRM)
1420 return errno = EINVAL,
1421 error("sigaction only implemented for SIGALRM");
1422 if (out != NULL)
1423 return errno = EINVAL,
1424 error("sigaction: param 3 != NULL not implemented");
1425
1426 timer_fn = in->sa_handler;
1427 return 0;
1428}
1429
1430#undef signal
1431sig_handler_t mingw_signal(int sig, sig_handler_t handler)
1432{
0d30ad71 1433 sig_handler_t old = timer_fn;
6072fc31
JS		 1434 if (sig != SIGALRM)
1435 return signal(sig, handler);
6072fc31
JS		 1436 timer_fn = handler;
1437 return old;
f4626df5 1438}
4804aabc
SP		 1439
1440static const char *make_backslash_path(const char *path)
1441{
1442 static char buf[PATH_MAX + 1];
1443 char *c;
1444
1445 if (strlcpy(buf, path, PATH_MAX) >= PATH_MAX)
1446 die("Too long path: %.*s", 60, path);
1447
1448 for (c = buf; *c; c++) {
1449 if (*c == '/')
1450 *c = '\\';
1451 }
1452 return buf;
1453}
1454
1455void mingw_open_html(const char *unixpath)
1456{
1457 const char *htmlpath = make_backslash_path(unixpath);
928500e0
JS		 1458 typedef HINSTANCE (WINAPI *T)(HWND, const char *,
1459 const char *, const char *, const char *, INT);
1460 T ShellExecute;
1461 HMODULE shell32;
442dada2 1462 int r;
928500e0
JS		 1463
1464 shell32 = LoadLibrary("shell32.dll");
1465 if (!shell32)
1466 die("cannot load shell32.dll");
1467 ShellExecute = (T)GetProcAddress(shell32, "ShellExecuteA");
1468 if (!ShellExecute)
1469 die("cannot run browser");
1470
4804aabc 1471 printf("Launching default browser to display HTML ...\n");
442dada2 1472 r = (int)ShellExecute(NULL, "open", htmlpath, NULL, "\\", SW_SHOWNORMAL);
928500e0 1473 FreeLibrary(shell32);
442dada2
PT		 1474 /* see the MSDN documentation referring to the result codes here */
1475 if (r <= 32) {
1476 die("failed to launch browser for %.*s", MAX_PATH, unixpath);
1477 }
4804aabc 1478}
7be401e0
PK		 1479
1480int link(const char *oldpath, const char *newpath)
1481{
d7fa500f 1482 typedef BOOL (WINAPI *T)(const char*, const char*, LPSECURITY_ATTRIBUTES);
7be401e0
PK		 1483 static T create_hard_link = NULL;
1484 if (!create_hard_link) {
1485 create_hard_link = (T) GetProcAddress(
1486 GetModuleHandle("kernel32.dll"), "CreateHardLinkA");
1487 if (!create_hard_link)
1488 create_hard_link = (T)-1;
1489 }
1490 if (create_hard_link == (T)-1) {
1491 errno = ENOSYS;
1492 return -1;
1493 }
1494 if (!create_hard_link(newpath, oldpath, NULL)) {
1495 errno = err_win_to_posix(GetLastError());
1496 return -1;
1497 }
1498 return 0;
1499}
0dbbbc1e
JS		 1500
1501char *getpass(const char *prompt)
1502{
1503 struct strbuf buf = STRBUF_INIT;
1504
1505 fputs(prompt, stderr);
1506 for (;;) {
1507 char c = _getch();
1508 if (c == '\r' || c == '\n')
1509 break;
1510 strbuf_addch(&buf, c);
1511 }
1512 fputs("\n", stderr);
1513 return strbuf_detach(&buf, NULL);
1514}
e16c60d9 1515
52de4db5
EFL		 1516pid_t waitpid(pid_t pid, int *status, unsigned options)
1517{
1518 HANDLE h = OpenProcess(SYNCHRONIZE | PROCESS_QUERY_INFORMATION,
1519 FALSE, pid);
1520 if (!h) {
1521 errno = ECHILD;
1522 return -1;
1523 }
1524
ef7108ca
EFL		 1525 if (pid > 0 && options & WNOHANG) {
1526 if (WAIT_OBJECT_0 != WaitForSingleObject(h, 0)) {
1527 CloseHandle(h);
1528 return 0;
1529 }
1530 options &= ~WNOHANG;
1531 }
1532
52de4db5
EFL		 1533 if (options == 0) {
1534 struct pinfo_t **ppinfo;
1535 if (WaitForSingleObject(h, INFINITE) != WAIT_OBJECT_0) {
1536 CloseHandle(h);
1537 return 0;
1538 }
1539
1540 if (status)
1541 GetExitCodeProcess(h, (LPDWORD)status);
1542
1543 EnterCriticalSection(&pinfo_cs);
1544
1545 ppinfo = &pinfo;
1546 while (*ppinfo) {
1547 struct pinfo_t *info = *ppinfo;
1548 if (info->pid == pid) {
1549 CloseHandle(info->proc);
1550 *ppinfo = info->next;
1551 free(info);
1552 break;
1553 }
1554 ppinfo = &info->next;
1555 }
1556
1557 LeaveCriticalSection(&pinfo_cs);
1558
1559 CloseHandle(h);
1560 return pid;
1561 }
1562 CloseHandle(h);
1563
1564 errno = EINVAL;
1565 return -1;
1566}
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