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1 | #include "../git-compat-util.h" | |
2 | #include "win32.h" | |
3 | #include <conio.h> | |
4 | #include "../strbuf.h" | |
5 | ||
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 | } | |
118 | ||
119 | #undef open | |
120 | int mingw_open (const char *filename, int oflags, ...) | |
121 | { | |
122 | va_list args; | |
123 | unsigned mode; | |
124 | int fd; | |
125 | ||
126 | va_start(args, oflags); | |
127 | mode = va_arg(args, int); | |
128 | va_end(args); | |
129 | ||
130 | if (!strcmp(filename, "/dev/null")) | |
131 | filename = "nul"; | |
132 | ||
133 | fd = open(filename, oflags, mode); | |
134 | ||
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 | ||
143 | static inline time_t filetime_to_time_t(const FILETIME *ft) | |
144 | { | |
145 | long long winTime = ((long long)ft->dwHighDateTime << 32) + ft->dwLowDateTime; | |
146 | winTime -= 116444736000000000LL; /* Windows to Unix Epoch conversion */ | |
147 | winTime /= 10000000; /* Nano to seconds resolution */ | |
148 | return (time_t)winTime; | |
149 | } | |
150 | ||
151 | /* We keep the do_lstat code in a separate function to avoid recursion. | |
152 | * When a path ends with a slash, the stat will fail with ENOENT. In | |
153 | * this case, we strip the trailing slashes and stat again. | |
154 | */ | |
155 | static int do_lstat(const char *file_name, struct stat *buf) | |
156 | { | |
157 | WIN32_FILE_ATTRIBUTE_DATA fdata; | |
158 | ||
159 | if (!(errno = get_file_attr(file_name, &fdata))) { | |
160 | buf->st_ino = 0; | |
161 | buf->st_gid = 0; | |
162 | buf->st_uid = 0; | |
163 | buf->st_nlink = 1; | |
164 | buf->st_mode = file_attr_to_st_mode(fdata.dwFileAttributes); | |
165 | buf->st_size = fdata.nFileSizeLow | | |
166 | (((off_t)fdata.nFileSizeHigh)<<32); | |
167 | buf->st_dev = buf->st_rdev = 0; /* not used by Git */ | |
168 | buf->st_atime = filetime_to_time_t(&(fdata.ftLastAccessTime)); | |
169 | buf->st_mtime = filetime_to_time_t(&(fdata.ftLastWriteTime)); | |
170 | buf->st_ctime = filetime_to_time_t(&(fdata.ftCreationTime)); | |
171 | return 0; | |
172 | } | |
173 | return -1; | |
174 | } | |
175 | ||
176 | /* We provide our own lstat/fstat functions, since the provided | |
177 | * lstat/fstat functions are so slow. These stat functions are | |
178 | * tailored for Git's usage (read: fast), and are not meant to be | |
179 | * complete. Note that Git stat()s are redirected to mingw_lstat() | |
180 | * too, since Windows doesn't really handle symlinks that well. | |
181 | */ | |
182 | int mingw_lstat(const char *file_name, struct stat *buf) | |
183 | { | |
184 | int namelen; | |
185 | static char alt_name[PATH_MAX]; | |
186 | ||
187 | if (!do_lstat(file_name, buf)) | |
188 | return 0; | |
189 | ||
190 | /* if file_name ended in a '/', Windows returned ENOENT; | |
191 | * try again without trailing slashes | |
192 | */ | |
193 | if (errno != ENOENT) | |
194 | return -1; | |
195 | ||
196 | namelen = strlen(file_name); | |
197 | if (namelen && file_name[namelen-1] != '/') | |
198 | return -1; | |
199 | while (namelen && file_name[namelen-1] == '/') | |
200 | --namelen; | |
201 | if (!namelen || namelen >= PATH_MAX) | |
202 | return -1; | |
203 | ||
204 | memcpy(alt_name, file_name, namelen); | |
205 | alt_name[namelen] = 0; | |
206 | return do_lstat(alt_name, buf); | |
207 | } | |
208 | ||
209 | #undef fstat | |
210 | int mingw_fstat(int fd, struct stat *buf) | |
211 | { | |
212 | HANDLE fh = (HANDLE)_get_osfhandle(fd); | |
213 | BY_HANDLE_FILE_INFORMATION fdata; | |
214 | ||
215 | if (fh == INVALID_HANDLE_VALUE) { | |
216 | errno = EBADF; | |
217 | return -1; | |
218 | } | |
219 | /* direct non-file handles to MS's fstat() */ | |
220 | if (GetFileType(fh) != FILE_TYPE_DISK) | |
221 | return _fstati64(fd, buf); | |
222 | ||
223 | if (GetFileInformationByHandle(fh, &fdata)) { | |
224 | buf->st_ino = 0; | |
225 | buf->st_gid = 0; | |
226 | buf->st_uid = 0; | |
227 | buf->st_nlink = 1; | |
228 | buf->st_mode = file_attr_to_st_mode(fdata.dwFileAttributes); | |
229 | buf->st_size = fdata.nFileSizeLow | | |
230 | (((off_t)fdata.nFileSizeHigh)<<32); | |
231 | buf->st_dev = buf->st_rdev = 0; /* not used by Git */ | |
232 | buf->st_atime = filetime_to_time_t(&(fdata.ftLastAccessTime)); | |
233 | buf->st_mtime = filetime_to_time_t(&(fdata.ftLastWriteTime)); | |
234 | buf->st_ctime = filetime_to_time_t(&(fdata.ftCreationTime)); | |
235 | return 0; | |
236 | } | |
237 | errno = EBADF; | |
238 | return -1; | |
239 | } | |
240 | ||
241 | static inline void time_t_to_filetime(time_t t, FILETIME *ft) | |
242 | { | |
243 | long long winTime = t * 10000000LL + 116444736000000000LL; | |
244 | ft->dwLowDateTime = winTime; | |
245 | ft->dwHighDateTime = winTime >> 32; | |
246 | } | |
247 | ||
248 | int mingw_utime (const char *file_name, const struct utimbuf *times) | |
249 | { | |
250 | FILETIME mft, aft; | |
251 | int fh, rc; | |
252 | ||
253 | /* must have write permission */ | |
254 | if ((fh = open(file_name, O_RDWR | O_BINARY)) < 0) | |
255 | return -1; | |
256 | ||
257 | time_t_to_filetime(times->modtime, &mft); | |
258 | time_t_to_filetime(times->actime, &aft); | |
259 | if (!SetFileTime((HANDLE)_get_osfhandle(fh), NULL, &aft, &mft)) { | |
260 | errno = EINVAL; | |
261 | rc = -1; | |
262 | } else | |
263 | rc = 0; | |
264 | close(fh); | |
265 | return rc; | |
266 | } | |
267 | ||
268 | unsigned int sleep (unsigned int seconds) | |
269 | { | |
270 | Sleep(seconds*1000); | |
271 | return 0; | |
272 | } | |
273 | ||
274 | int mkstemp(char *template) | |
275 | { | |
276 | char *filename = mktemp(template); | |
277 | if (filename == NULL) | |
278 | return -1; | |
279 | return open(filename, O_RDWR | O_CREAT, 0600); | |
280 | } | |
281 | ||
282 | int gettimeofday(struct timeval *tv, void *tz) | |
283 | { | |
284 | SYSTEMTIME st; | |
285 | struct tm tm; | |
286 | GetSystemTime(&st); | |
287 | tm.tm_year = st.wYear-1900; | |
288 | tm.tm_mon = st.wMonth-1; | |
289 | tm.tm_mday = st.wDay; | |
290 | tm.tm_hour = st.wHour; | |
291 | tm.tm_min = st.wMinute; | |
292 | tm.tm_sec = st.wSecond; | |
293 | tv->tv_sec = tm_to_time_t(&tm); | |
294 | if (tv->tv_sec < 0) | |
295 | return -1; | |
296 | tv->tv_usec = st.wMilliseconds*1000; | |
297 | return 0; | |
298 | } | |
299 | ||
300 | int pipe(int filedes[2]) | |
301 | { | |
302 | HANDLE h[2]; | |
303 | ||
304 | /* this creates non-inheritable handles */ | |
305 | if (!CreatePipe(&h[0], &h[1], NULL, 8192)) { | |
306 | errno = err_win_to_posix(GetLastError()); | |
307 | return -1; | |
308 | } | |
309 | filedes[0] = _open_osfhandle((int)h[0], O_NOINHERIT); | |
310 | if (filedes[0] < 0) { | |
311 | CloseHandle(h[0]); | |
312 | CloseHandle(h[1]); | |
313 | return -1; | |
314 | } | |
315 | filedes[1] = _open_osfhandle((int)h[1], O_NOINHERIT); | |
316 | if (filedes[0] < 0) { | |
317 | close(filedes[0]); | |
318 | CloseHandle(h[1]); | |
319 | return -1; | |
320 | } | |
321 | return 0; | |
322 | } | |
323 | ||
324 | int poll(struct pollfd *ufds, unsigned int nfds, int timeout) | |
325 | { | |
326 | int i, pending; | |
327 | ||
328 | if (timeout >= 0) { | |
329 | if (nfds == 0) { | |
330 | Sleep(timeout); | |
331 | return 0; | |
332 | } | |
333 | return errno = EINVAL, error("poll timeout not supported"); | |
334 | } | |
335 | ||
336 | /* When there is only one fd to wait for, then we pretend that | |
337 | * input is available and let the actual wait happen when the | |
338 | * caller invokes read(). | |
339 | */ | |
340 | if (nfds == 1) { | |
341 | if (!(ufds[0].events & POLLIN)) | |
342 | return errno = EINVAL, error("POLLIN not set"); | |
343 | ufds[0].revents = POLLIN; | |
344 | return 0; | |
345 | } | |
346 | ||
347 | repeat: | |
348 | pending = 0; | |
349 | for (i = 0; i < nfds; i++) { | |
350 | DWORD avail = 0; | |
351 | HANDLE h = (HANDLE) _get_osfhandle(ufds[i].fd); | |
352 | if (h == INVALID_HANDLE_VALUE) | |
353 | return -1; /* errno was set */ | |
354 | ||
355 | if (!(ufds[i].events & POLLIN)) | |
356 | return errno = EINVAL, error("POLLIN not set"); | |
357 | ||
358 | /* this emulation works only for pipes */ | |
359 | if (!PeekNamedPipe(h, NULL, 0, NULL, &avail, NULL)) { | |
360 | int err = GetLastError(); | |
361 | if (err == ERROR_BROKEN_PIPE) { | |
362 | ufds[i].revents = POLLHUP; | |
363 | pending++; | |
364 | } else { | |
365 | errno = EINVAL; | |
366 | return error("PeekNamedPipe failed," | |
367 | " GetLastError: %u", err); | |
368 | } | |
369 | } else if (avail) { | |
370 | ufds[i].revents = POLLIN; | |
371 | pending++; | |
372 | } else | |
373 | ufds[i].revents = 0; | |
374 | } | |
375 | if (!pending) { | |
376 | /* The only times that we spin here is when the process | |
377 | * that is connected through the pipes is waiting for | |
378 | * its own input data to become available. But since | |
379 | * the process (pack-objects) is itself CPU intensive, | |
380 | * it will happily pick up the time slice that we are | |
381 | * relinquishing here. | |
382 | */ | |
383 | Sleep(0); | |
384 | goto repeat; | |
385 | } | |
386 | return 0; | |
387 | } | |
388 | ||
389 | struct tm *gmtime_r(const time_t *timep, struct tm *result) | |
390 | { | |
391 | /* gmtime() in MSVCRT.DLL is thread-safe, but not reentrant */ | |
392 | memcpy(result, gmtime(timep), sizeof(struct tm)); | |
393 | return result; | |
394 | } | |
395 | ||
396 | struct tm *localtime_r(const time_t *timep, struct tm *result) | |
397 | { | |
398 | /* localtime() in MSVCRT.DLL is thread-safe, but not reentrant */ | |
399 | memcpy(result, localtime(timep), sizeof(struct tm)); | |
400 | return result; | |
401 | } | |
402 | ||
403 | #undef getcwd | |
404 | char *mingw_getcwd(char *pointer, int len) | |
405 | { | |
406 | int i; | |
407 | char *ret = getcwd(pointer, len); | |
408 | if (!ret) | |
409 | return ret; | |
410 | for (i = 0; pointer[i]; i++) | |
411 | if (pointer[i] == '\\') | |
412 | pointer[i] = '/'; | |
413 | return ret; | |
414 | } | |
415 | ||
416 | #undef getenv | |
417 | char *mingw_getenv(const char *name) | |
418 | { | |
419 | char *result = getenv(name); | |
420 | if (!result && !strcmp(name, "TMPDIR")) { | |
421 | /* on Windows it is TMP and TEMP */ | |
422 | result = getenv("TMP"); | |
423 | if (!result) | |
424 | result = getenv("TEMP"); | |
425 | } | |
426 | return result; | |
427 | } | |
428 | ||
429 | /* | |
430 | * See http://msdn2.microsoft.com/en-us/library/17w5ykft(vs.71).aspx | |
431 | * (Parsing C++ Command-Line Arguments) | |
432 | */ | |
433 | static const char *quote_arg(const char *arg) | |
434 | { | |
435 | /* count chars to quote */ | |
436 | int len = 0, n = 0; | |
437 | int force_quotes = 0; | |
438 | char *q, *d; | |
439 | const char *p = arg; | |
440 | if (!*p) force_quotes = 1; | |
441 | while (*p) { | |
442 | if (isspace(*p) || *p == '*' || *p == '?' || *p == '{' || *p == '\'') | |
443 | force_quotes = 1; | |
444 | else if (*p == '"') | |
445 | n++; | |
446 | else if (*p == '\\') { | |
447 | int count = 0; | |
448 | while (*p == '\\') { | |
449 | count++; | |
450 | p++; | |
451 | len++; | |
452 | } | |
453 | if (*p == '"') | |
454 | n += count*2 + 1; | |
455 | continue; | |
456 | } | |
457 | len++; | |
458 | p++; | |
459 | } | |
460 | if (!force_quotes && n == 0) | |
461 | return arg; | |
462 | ||
463 | /* insert \ where necessary */ | |
464 | d = q = xmalloc(len+n+3); | |
465 | *d++ = '"'; | |
466 | while (*arg) { | |
467 | if (*arg == '"') | |
468 | *d++ = '\\'; | |
469 | else if (*arg == '\\') { | |
470 | int count = 0; | |
471 | while (*arg == '\\') { | |
472 | count++; | |
473 | *d++ = *arg++; | |
474 | } | |
475 | if (*arg == '"') { | |
476 | while (count-- > 0) | |
477 | *d++ = '\\'; | |
478 | *d++ = '\\'; | |
479 | } | |
480 | } | |
481 | *d++ = *arg++; | |
482 | } | |
483 | *d++ = '"'; | |
484 | *d++ = 0; | |
485 | return q; | |
486 | } | |
487 | ||
488 | static const char *parse_interpreter(const char *cmd) | |
489 | { | |
490 | static char buf[100]; | |
491 | char *p, *opt; | |
492 | int n, fd; | |
493 | ||
494 | /* don't even try a .exe */ | |
495 | n = strlen(cmd); | |
496 | if (n >= 4 && !strcasecmp(cmd+n-4, ".exe")) | |
497 | return NULL; | |
498 | ||
499 | fd = open(cmd, O_RDONLY); | |
500 | if (fd < 0) | |
501 | return NULL; | |
502 | n = read(fd, buf, sizeof(buf)-1); | |
503 | close(fd); | |
504 | if (n < 4) /* at least '#!/x' and not error */ | |
505 | return NULL; | |
506 | ||
507 | if (buf[0] != '#' || buf[1] != '!') | |
508 | return NULL; | |
509 | buf[n] = '\0'; | |
510 | p = buf + strcspn(buf, "\r\n"); | |
511 | if (!*p) | |
512 | return NULL; | |
513 | ||
514 | *p = '\0'; | |
515 | if (!(p = strrchr(buf+2, '/')) && !(p = strrchr(buf+2, '\\'))) | |
516 | return NULL; | |
517 | /* strip options */ | |
518 | if ((opt = strchr(p+1, ' '))) | |
519 | *opt = '\0'; | |
520 | return p+1; | |
521 | } | |
522 | ||
523 | /* | |
524 | * Splits the PATH into parts. | |
525 | */ | |
526 | static char **get_path_split(void) | |
527 | { | |
528 | char *p, **path, *envpath = getenv("PATH"); | |
529 | int i, n = 0; | |
530 | ||
531 | if (!envpath || !*envpath) | |
532 | return NULL; | |
533 | ||
534 | envpath = xstrdup(envpath); | |
535 | p = envpath; | |
536 | while (p) { | |
537 | char *dir = p; | |
538 | p = strchr(p, ';'); | |
539 | if (p) *p++ = '\0'; | |
540 | if (*dir) { /* not earlier, catches series of ; */ | |
541 | ++n; | |
542 | } | |
543 | } | |
544 | if (!n) | |
545 | return NULL; | |
546 | ||
547 | path = xmalloc((n+1)*sizeof(char *)); | |
548 | p = envpath; | |
549 | i = 0; | |
550 | do { | |
551 | if (*p) | |
552 | path[i++] = xstrdup(p); | |
553 | p = p+strlen(p)+1; | |
554 | } while (i < n); | |
555 | path[i] = NULL; | |
556 | ||
557 | free(envpath); | |
558 | ||
559 | return path; | |
560 | } | |
561 | ||
562 | static void free_path_split(char **path) | |
563 | { | |
564 | char **p = path; | |
565 | ||
566 | if (!path) | |
567 | return; | |
568 | ||
569 | while (*p) | |
570 | free(*p++); | |
571 | free(path); | |
572 | } | |
573 | ||
574 | /* | |
575 | * exe_only means that we only want to detect .exe files, but not scripts | |
576 | * (which do not have an extension) | |
577 | */ | |
578 | static char *lookup_prog(const char *dir, const char *cmd, int isexe, int exe_only) | |
579 | { | |
580 | char path[MAX_PATH]; | |
581 | snprintf(path, sizeof(path), "%s/%s.exe", dir, cmd); | |
582 | ||
583 | if (!isexe && access(path, F_OK) == 0) | |
584 | return xstrdup(path); | |
585 | path[strlen(path)-4] = '\0'; | |
586 | if ((!exe_only || isexe) && access(path, F_OK) == 0) | |
587 | if (!(GetFileAttributes(path) & FILE_ATTRIBUTE_DIRECTORY)) | |
588 | return xstrdup(path); | |
589 | return NULL; | |
590 | } | |
591 | ||
592 | /* | |
593 | * Determines the absolute path of cmd using the the split path in path. | |
594 | * If cmd contains a slash or backslash, no lookup is performed. | |
595 | */ | |
596 | static char *path_lookup(const char *cmd, char **path, int exe_only) | |
597 | { | |
598 | char *prog = NULL; | |
599 | int len = strlen(cmd); | |
600 | int isexe = len >= 4 && !strcasecmp(cmd+len-4, ".exe"); | |
601 | ||
602 | if (strchr(cmd, '/') || strchr(cmd, '\\')) | |
603 | prog = xstrdup(cmd); | |
604 | ||
605 | while (!prog && *path) | |
606 | prog = lookup_prog(*path++, cmd, isexe, exe_only); | |
607 | ||
608 | return prog; | |
609 | } | |
610 | ||
611 | static int env_compare(const void *a, const void *b) | |
612 | { | |
613 | char *const *ea = a; | |
614 | char *const *eb = b; | |
615 | return strcasecmp(*ea, *eb); | |
616 | } | |
617 | ||
618 | static pid_t mingw_spawnve_fd(const char *cmd, const char **argv, char **env, | |
619 | int prepend_cmd, int fhin, int fhout, int fherr) | |
620 | { | |
621 | STARTUPINFO si; | |
622 | PROCESS_INFORMATION pi; | |
623 | struct strbuf envblk, args; | |
624 | unsigned flags; | |
625 | BOOL ret; | |
626 | ||
627 | /* Determine whether or not we are associated to a console */ | |
628 | HANDLE cons = CreateFile("CONOUT$", GENERIC_WRITE, | |
629 | FILE_SHARE_WRITE, NULL, OPEN_EXISTING, | |
630 | FILE_ATTRIBUTE_NORMAL, NULL); | |
631 | if (cons == INVALID_HANDLE_VALUE) { | |
632 | /* There is no console associated with this process. | |
633 | * Since the child is a console process, Windows | |
634 | * would normally create a console window. But | |
635 | * since we'll be redirecting std streams, we do | |
636 | * not need the console. | |
637 | * It is necessary to use DETACHED_PROCESS | |
638 | * instead of CREATE_NO_WINDOW to make ssh | |
639 | * recognize that it has no console. | |
640 | */ | |
641 | flags = DETACHED_PROCESS; | |
642 | } else { | |
643 | /* There is already a console. If we specified | |
644 | * DETACHED_PROCESS here, too, Windows would | |
645 | * disassociate the child from the console. | |
646 | * The same is true for CREATE_NO_WINDOW. | |
647 | * Go figure! | |
648 | */ | |
649 | flags = 0; | |
650 | CloseHandle(cons); | |
651 | } | |
652 | memset(&si, 0, sizeof(si)); | |
653 | si.cb = sizeof(si); | |
654 | si.dwFlags = STARTF_USESTDHANDLES; | |
655 | si.hStdInput = (HANDLE) _get_osfhandle(fhin); | |
656 | si.hStdOutput = (HANDLE) _get_osfhandle(fhout); | |
657 | si.hStdError = (HANDLE) _get_osfhandle(fherr); | |
658 | ||
659 | /* concatenate argv, quoting args as we go */ | |
660 | strbuf_init(&args, 0); | |
661 | if (prepend_cmd) { | |
662 | char *quoted = (char *)quote_arg(cmd); | |
663 | strbuf_addstr(&args, quoted); | |
664 | if (quoted != cmd) | |
665 | free(quoted); | |
666 | } | |
667 | for (; *argv; argv++) { | |
668 | char *quoted = (char *)quote_arg(*argv); | |
669 | if (*args.buf) | |
670 | strbuf_addch(&args, ' '); | |
671 | strbuf_addstr(&args, quoted); | |
672 | if (quoted != *argv) | |
673 | free(quoted); | |
674 | } | |
675 | ||
676 | if (env) { | |
677 | int count = 0; | |
678 | char **e, **sorted_env; | |
679 | ||
680 | for (e = env; *e; e++) | |
681 | count++; | |
682 | ||
683 | /* environment must be sorted */ | |
684 | sorted_env = xmalloc(sizeof(*sorted_env) * (count + 1)); | |
685 | memcpy(sorted_env, env, sizeof(*sorted_env) * (count + 1)); | |
686 | qsort(sorted_env, count, sizeof(*sorted_env), env_compare); | |
687 | ||
688 | strbuf_init(&envblk, 0); | |
689 | for (e = sorted_env; *e; e++) { | |
690 | strbuf_addstr(&envblk, *e); | |
691 | strbuf_addch(&envblk, '\0'); | |
692 | } | |
693 | free(sorted_env); | |
694 | } | |
695 | ||
696 | memset(&pi, 0, sizeof(pi)); | |
697 | ret = CreateProcess(cmd, args.buf, NULL, NULL, TRUE, flags, | |
698 | env ? envblk.buf : NULL, NULL, &si, &pi); | |
699 | ||
700 | if (env) | |
701 | strbuf_release(&envblk); | |
702 | strbuf_release(&args); | |
703 | ||
704 | if (!ret) { | |
705 | errno = ENOENT; | |
706 | return -1; | |
707 | } | |
708 | CloseHandle(pi.hThread); | |
709 | return (pid_t)pi.hProcess; | |
710 | } | |
711 | ||
712 | static pid_t mingw_spawnve(const char *cmd, const char **argv, char **env, | |
713 | int prepend_cmd) | |
714 | { | |
715 | return mingw_spawnve_fd(cmd, argv, env, prepend_cmd, 0, 1, 2); | |
716 | } | |
717 | ||
718 | pid_t mingw_spawnvpe(const char *cmd, const char **argv, char **env, | |
719 | int fhin, int fhout, int fherr) | |
720 | { | |
721 | pid_t pid; | |
722 | char **path = get_path_split(); | |
723 | char *prog = path_lookup(cmd, path, 0); | |
724 | ||
725 | if (!prog) { | |
726 | errno = ENOENT; | |
727 | pid = -1; | |
728 | } | |
729 | else { | |
730 | const char *interpr = parse_interpreter(prog); | |
731 | ||
732 | if (interpr) { | |
733 | const char *argv0 = argv[0]; | |
734 | char *iprog = path_lookup(interpr, path, 1); | |
735 | argv[0] = prog; | |
736 | if (!iprog) { | |
737 | errno = ENOENT; | |
738 | pid = -1; | |
739 | } | |
740 | else { | |
741 | pid = mingw_spawnve_fd(iprog, argv, env, 1, | |
742 | fhin, fhout, fherr); | |
743 | free(iprog); | |
744 | } | |
745 | argv[0] = argv0; | |
746 | } | |
747 | else | |
748 | pid = mingw_spawnve_fd(prog, argv, env, 0, | |
749 | fhin, fhout, fherr); | |
750 | free(prog); | |
751 | } | |
752 | free_path_split(path); | |
753 | return pid; | |
754 | } | |
755 | ||
756 | static int try_shell_exec(const char *cmd, char *const *argv, char **env) | |
757 | { | |
758 | const char *interpr = parse_interpreter(cmd); | |
759 | char **path; | |
760 | char *prog; | |
761 | int pid = 0; | |
762 | ||
763 | if (!interpr) | |
764 | return 0; | |
765 | path = get_path_split(); | |
766 | prog = path_lookup(interpr, path, 1); | |
767 | if (prog) { | |
768 | int argc = 0; | |
769 | const char **argv2; | |
770 | while (argv[argc]) argc++; | |
771 | argv2 = xmalloc(sizeof(*argv) * (argc+1)); | |
772 | argv2[0] = (char *)cmd; /* full path to the script file */ | |
773 | memcpy(&argv2[1], &argv[1], sizeof(*argv) * argc); | |
774 | pid = mingw_spawnve(prog, argv2, env, 1); | |
775 | if (pid >= 0) { | |
776 | int status; | |
777 | if (waitpid(pid, &status, 0) < 0) | |
778 | status = 255; | |
779 | exit(status); | |
780 | } | |
781 | pid = 1; /* indicate that we tried but failed */ | |
782 | free(prog); | |
783 | free(argv2); | |
784 | } | |
785 | free_path_split(path); | |
786 | return pid; | |
787 | } | |
788 | ||
789 | static void mingw_execve(const char *cmd, char *const *argv, char *const *env) | |
790 | { | |
791 | /* check if git_command is a shell script */ | |
792 | if (!try_shell_exec(cmd, argv, (char **)env)) { | |
793 | int pid, status; | |
794 | ||
795 | pid = mingw_spawnve(cmd, (const char **)argv, (char **)env, 0); | |
796 | if (pid < 0) | |
797 | return; | |
798 | if (waitpid(pid, &status, 0) < 0) | |
799 | status = 255; | |
800 | exit(status); | |
801 | } | |
802 | } | |
803 | ||
804 | void mingw_execvp(const char *cmd, char *const *argv) | |
805 | { | |
806 | char **path = get_path_split(); | |
807 | char *prog = path_lookup(cmd, path, 0); | |
808 | ||
809 | if (prog) { | |
810 | mingw_execve(prog, argv, environ); | |
811 | free(prog); | |
812 | } else | |
813 | errno = ENOENT; | |
814 | ||
815 | free_path_split(path); | |
816 | } | |
817 | ||
818 | static char **copy_environ(void) | |
819 | { | |
820 | char **env; | |
821 | int i = 0; | |
822 | while (environ[i]) | |
823 | i++; | |
824 | env = xmalloc((i+1)*sizeof(*env)); | |
825 | for (i = 0; environ[i]; i++) | |
826 | env[i] = xstrdup(environ[i]); | |
827 | env[i] = NULL; | |
828 | return env; | |
829 | } | |
830 | ||
831 | void free_environ(char **env) | |
832 | { | |
833 | int i; | |
834 | for (i = 0; env[i]; i++) | |
835 | free(env[i]); | |
836 | free(env); | |
837 | } | |
838 | ||
839 | static int lookup_env(char **env, const char *name, size_t nmln) | |
840 | { | |
841 | int i; | |
842 | ||
843 | for (i = 0; env[i]; i++) { | |
844 | if (0 == strncmp(env[i], name, nmln) | |
845 | && '=' == env[i][nmln]) | |
846 | /* matches */ | |
847 | return i; | |
848 | } | |
849 | return -1; | |
850 | } | |
851 | ||
852 | /* | |
853 | * If name contains '=', then sets the variable, otherwise it unsets it | |
854 | */ | |
855 | static char **env_setenv(char **env, const char *name) | |
856 | { | |
857 | char *eq = strchrnul(name, '='); | |
858 | int i = lookup_env(env, name, eq-name); | |
859 | ||
860 | if (i < 0) { | |
861 | if (*eq) { | |
862 | for (i = 0; env[i]; i++) | |
863 | ; | |
864 | env = xrealloc(env, (i+2)*sizeof(*env)); | |
865 | env[i] = xstrdup(name); | |
866 | env[i+1] = NULL; | |
867 | } | |
868 | } | |
869 | else { | |
870 | free(env[i]); | |
871 | if (*eq) | |
872 | env[i] = xstrdup(name); | |
873 | else | |
874 | for (; env[i]; i++) | |
875 | env[i] = env[i+1]; | |
876 | } | |
877 | return env; | |
878 | } | |
879 | ||
880 | /* | |
881 | * Copies global environ and adjusts variables as specified by vars. | |
882 | */ | |
883 | char **make_augmented_environ(const char *const *vars) | |
884 | { | |
885 | char **env = copy_environ(); | |
886 | ||
887 | while (*vars) | |
888 | env = env_setenv(env, *vars++); | |
889 | return env; | |
890 | } | |
891 | ||
892 | /* | |
893 | * Note, this isn't a complete replacement for getaddrinfo. It assumes | |
894 | * that service contains a numerical port, or that it it is null. It | |
895 | * does a simple search using gethostbyname, and returns one IPv4 host | |
896 | * if one was found. | |
897 | */ | |
898 | static int WSAAPI getaddrinfo_stub(const char *node, const char *service, | |
899 | const struct addrinfo *hints, | |
900 | struct addrinfo **res) | |
901 | { | |
902 | struct hostent *h = gethostbyname(node); | |
903 | struct addrinfo *ai; | |
904 | struct sockaddr_in *sin; | |
905 | ||
906 | if (!h) | |
907 | return WSAGetLastError(); | |
908 | ||
909 | ai = xmalloc(sizeof(struct addrinfo)); | |
910 | *res = ai; | |
911 | ai->ai_flags = 0; | |
912 | ai->ai_family = AF_INET; | |
913 | ai->ai_socktype = hints->ai_socktype; | |
914 | switch (hints->ai_socktype) { | |
915 | case SOCK_STREAM: | |
916 | ai->ai_protocol = IPPROTO_TCP; | |
917 | break; | |
918 | case SOCK_DGRAM: | |
919 | ai->ai_protocol = IPPROTO_UDP; | |
920 | break; | |
921 | default: | |
922 | ai->ai_protocol = 0; | |
923 | break; | |
924 | } | |
925 | ai->ai_addrlen = sizeof(struct sockaddr_in); | |
926 | ai->ai_canonname = strdup(h->h_name); | |
927 | ||
928 | sin = xmalloc(ai->ai_addrlen); | |
929 | memset(sin, 0, ai->ai_addrlen); | |
930 | sin->sin_family = AF_INET; | |
931 | if (service) | |
932 | sin->sin_port = htons(atoi(service)); | |
933 | sin->sin_addr = *(struct in_addr *)h->h_addr; | |
934 | ai->ai_addr = (struct sockaddr *)sin; | |
935 | ai->ai_next = 0; | |
936 | return 0; | |
937 | } | |
938 | ||
939 | static void WSAAPI freeaddrinfo_stub(struct addrinfo *res) | |
940 | { | |
941 | free(res->ai_canonname); | |
942 | free(res->ai_addr); | |
943 | free(res); | |
944 | } | |
945 | ||
946 | static int WSAAPI getnameinfo_stub(const struct sockaddr *sa, socklen_t salen, | |
947 | char *host, DWORD hostlen, | |
948 | char *serv, DWORD servlen, int flags) | |
949 | { | |
950 | const struct sockaddr_in *sin = (const struct sockaddr_in *)sa; | |
951 | if (sa->sa_family != AF_INET) | |
952 | return EAI_FAMILY; | |
953 | if (!host && !serv) | |
954 | return EAI_NONAME; | |
955 | ||
956 | if (host && hostlen > 0) { | |
957 | struct hostent *ent = NULL; | |
958 | if (!(flags & NI_NUMERICHOST)) | |
959 | ent = gethostbyaddr((const char *)&sin->sin_addr, | |
960 | sizeof(sin->sin_addr), AF_INET); | |
961 | ||
962 | if (ent) | |
963 | snprintf(host, hostlen, "%s", ent->h_name); | |
964 | else if (flags & NI_NAMEREQD) | |
965 | return EAI_NONAME; | |
966 | else | |
967 | snprintf(host, hostlen, "%s", inet_ntoa(sin->sin_addr)); | |
968 | } | |
969 | ||
970 | if (serv && servlen > 0) { | |
971 | struct servent *ent = NULL; | |
972 | if (!(flags & NI_NUMERICSERV)) | |
973 | ent = getservbyport(sin->sin_port, | |
974 | flags & NI_DGRAM ? "udp" : "tcp"); | |
975 | ||
976 | if (ent) | |
977 | snprintf(serv, servlen, "%s", ent->s_name); | |
978 | else | |
979 | snprintf(serv, servlen, "%d", ntohs(sin->sin_port)); | |
980 | } | |
981 | ||
982 | return 0; | |
983 | } | |
984 | ||
985 | static HMODULE ipv6_dll = NULL; | |
986 | static void (WSAAPI *ipv6_freeaddrinfo)(struct addrinfo *res); | |
987 | static int (WSAAPI *ipv6_getaddrinfo)(const char *node, const char *service, | |
988 | const struct addrinfo *hints, | |
989 | struct addrinfo **res); | |
990 | static int (WSAAPI *ipv6_getnameinfo)(const struct sockaddr *sa, socklen_t salen, | |
991 | char *host, DWORD hostlen, | |
992 | char *serv, DWORD servlen, int flags); | |
993 | /* | |
994 | * gai_strerror is an inline function in the ws2tcpip.h header, so we | |
995 | * don't need to try to load that one dynamically. | |
996 | */ | |
997 | ||
998 | static void socket_cleanup(void) | |
999 | { | |
1000 | WSACleanup(); | |
1001 | if (ipv6_dll) | |
1002 | FreeLibrary(ipv6_dll); | |
1003 | ipv6_dll = NULL; | |
1004 | ipv6_freeaddrinfo = freeaddrinfo_stub; | |
1005 | ipv6_getaddrinfo = getaddrinfo_stub; | |
1006 | ipv6_getnameinfo = getnameinfo_stub; | |
1007 | } | |
1008 | ||
1009 | static void ensure_socket_initialization(void) | |
1010 | { | |
1011 | WSADATA wsa; | |
1012 | static int initialized = 0; | |
1013 | const char *libraries[] = { "ws2_32.dll", "wship6.dll", NULL }; | |
1014 | const char **name; | |
1015 | ||
1016 | if (initialized) | |
1017 | return; | |
1018 | ||
1019 | if (WSAStartup(MAKEWORD(2,2), &wsa)) | |
1020 | die("unable to initialize winsock subsystem, error %d", | |
1021 | WSAGetLastError()); | |
1022 | ||
1023 | for (name = libraries; *name; name++) { | |
1024 | ipv6_dll = LoadLibrary(*name); | |
1025 | if (!ipv6_dll) | |
1026 | continue; | |
1027 | ||
1028 | ipv6_freeaddrinfo = (void (WSAAPI *)(struct addrinfo *)) | |
1029 | GetProcAddress(ipv6_dll, "freeaddrinfo"); | |
1030 | ipv6_getaddrinfo = (int (WSAAPI *)(const char *, const char *, | |
1031 | const struct addrinfo *, | |
1032 | struct addrinfo **)) | |
1033 | GetProcAddress(ipv6_dll, "getaddrinfo"); | |
1034 | ipv6_getnameinfo = (int (WSAAPI *)(const struct sockaddr *, | |
1035 | socklen_t, char *, DWORD, | |
1036 | char *, DWORD, int)) | |
1037 | GetProcAddress(ipv6_dll, "getnameinfo"); | |
1038 | if (!ipv6_freeaddrinfo || !ipv6_getaddrinfo || !ipv6_getnameinfo) { | |
1039 | FreeLibrary(ipv6_dll); | |
1040 | ipv6_dll = NULL; | |
1041 | } else | |
1042 | break; | |
1043 | } | |
1044 | if (!ipv6_freeaddrinfo || !ipv6_getaddrinfo || !ipv6_getnameinfo) { | |
1045 | ipv6_freeaddrinfo = freeaddrinfo_stub; | |
1046 | ipv6_getaddrinfo = getaddrinfo_stub; | |
1047 | ipv6_getnameinfo = getnameinfo_stub; | |
1048 | } | |
1049 | ||
1050 | atexit(socket_cleanup); | |
1051 | initialized = 1; | |
1052 | } | |
1053 | ||
1054 | #undef gethostbyname | |
1055 | struct hostent *mingw_gethostbyname(const char *host) | |
1056 | { | |
1057 | ensure_socket_initialization(); | |
1058 | return gethostbyname(host); | |
1059 | } | |
1060 | ||
1061 | void mingw_freeaddrinfo(struct addrinfo *res) | |
1062 | { | |
1063 | ipv6_freeaddrinfo(res); | |
1064 | } | |
1065 | ||
1066 | int mingw_getaddrinfo(const char *node, const char *service, | |
1067 | const struct addrinfo *hints, struct addrinfo **res) | |
1068 | { | |
1069 | ensure_socket_initialization(); | |
1070 | return ipv6_getaddrinfo(node, service, hints, res); | |
1071 | } | |
1072 | ||
1073 | int mingw_getnameinfo(const struct sockaddr *sa, socklen_t salen, | |
1074 | char *host, DWORD hostlen, char *serv, DWORD servlen, | |
1075 | int flags) | |
1076 | { | |
1077 | ensure_socket_initialization(); | |
1078 | return ipv6_getnameinfo(sa, salen, host, hostlen, serv, servlen, flags); | |
1079 | } | |
1080 | ||
1081 | int mingw_socket(int domain, int type, int protocol) | |
1082 | { | |
1083 | int sockfd; | |
1084 | SOCKET s = WSASocket(domain, type, protocol, NULL, 0, 0); | |
1085 | if (s == INVALID_SOCKET) { | |
1086 | /* | |
1087 | * WSAGetLastError() values are regular BSD error codes | |
1088 | * biased by WSABASEERR. | |
1089 | * However, strerror() does not know about networking | |
1090 | * specific errors, which are values beginning at 38 or so. | |
1091 | * Therefore, we choose to leave the biased error code | |
1092 | * in errno so that _if_ someone looks up the code somewhere, | |
1093 | * then it is at least the number that are usually listed. | |
1094 | */ | |
1095 | errno = WSAGetLastError(); | |
1096 | return -1; | |
1097 | } | |
1098 | /* convert into a file descriptor */ | |
1099 | if ((sockfd = _open_osfhandle(s, O_RDWR|O_BINARY)) < 0) { | |
1100 | closesocket(s); | |
1101 | return error("unable to make a socket file descriptor: %s", | |
1102 | strerror(errno)); | |
1103 | } | |
1104 | return sockfd; | |
1105 | } | |
1106 | ||
1107 | #undef connect | |
1108 | int mingw_connect(int sockfd, struct sockaddr *sa, size_t sz) | |
1109 | { | |
1110 | SOCKET s = (SOCKET)_get_osfhandle(sockfd); | |
1111 | return connect(s, sa, sz); | |
1112 | } | |
1113 | ||
1114 | #undef rename | |
1115 | int mingw_rename(const char *pold, const char *pnew) | |
1116 | { | |
1117 | DWORD attrs, gle; | |
1118 | int tries = 0; | |
1119 | static const int delay[] = { 0, 1, 10, 20, 40 }; | |
1120 | ||
1121 | /* | |
1122 | * Try native rename() first to get errno right. | |
1123 | * It is based on MoveFile(), which cannot overwrite existing files. | |
1124 | */ | |
1125 | if (!rename(pold, pnew)) | |
1126 | return 0; | |
1127 | if (errno != EEXIST) | |
1128 | return -1; | |
1129 | repeat: | |
1130 | if (MoveFileEx(pold, pnew, MOVEFILE_REPLACE_EXISTING)) | |
1131 | return 0; | |
1132 | /* TODO: translate more errors */ | |
1133 | gle = GetLastError(); | |
1134 | if (gle == ERROR_ACCESS_DENIED && | |
1135 | (attrs = GetFileAttributes(pnew)) != INVALID_FILE_ATTRIBUTES) { | |
1136 | if (attrs & FILE_ATTRIBUTE_DIRECTORY) { | |
1137 | errno = EISDIR; | |
1138 | return -1; | |
1139 | } | |
1140 | if ((attrs & FILE_ATTRIBUTE_READONLY) && | |
1141 | SetFileAttributes(pnew, attrs & ~FILE_ATTRIBUTE_READONLY)) { | |
1142 | if (MoveFileEx(pold, pnew, MOVEFILE_REPLACE_EXISTING)) | |
1143 | return 0; | |
1144 | gle = GetLastError(); | |
1145 | /* revert file attributes on failure */ | |
1146 | SetFileAttributes(pnew, attrs); | |
1147 | } | |
1148 | } | |
1149 | if (tries < ARRAY_SIZE(delay) && gle == ERROR_ACCESS_DENIED) { | |
1150 | /* | |
1151 | * We assume that some other process had the source or | |
1152 | * destination file open at the wrong moment and retry. | |
1153 | * In order to give the other process a higher chance to | |
1154 | * complete its operation, we give up our time slice now. | |
1155 | * If we have to retry again, we do sleep a bit. | |
1156 | */ | |
1157 | Sleep(delay[tries]); | |
1158 | tries++; | |
1159 | goto repeat; | |
1160 | } | |
1161 | errno = EACCES; | |
1162 | return -1; | |
1163 | } | |
1164 | ||
1165 | /* | |
1166 | * Note that this doesn't return the actual pagesize, but | |
1167 | * the allocation granularity. If future Windows specific git code | |
1168 | * needs the real getpagesize function, we need to find another solution. | |
1169 | */ | |
1170 | int mingw_getpagesize(void) | |
1171 | { | |
1172 | SYSTEM_INFO si; | |
1173 | GetSystemInfo(&si); | |
1174 | return si.dwAllocationGranularity; | |
1175 | } | |
1176 | ||
1177 | struct passwd *getpwuid(int uid) | |
1178 | { | |
1179 | static char user_name[100]; | |
1180 | static struct passwd p; | |
1181 | ||
1182 | DWORD len = sizeof(user_name); | |
1183 | if (!GetUserName(user_name, &len)) | |
1184 | return NULL; | |
1185 | p.pw_name = user_name; | |
1186 | p.pw_gecos = "unknown"; | |
1187 | p.pw_dir = NULL; | |
1188 | return &p; | |
1189 | } | |
1190 | ||
1191 | static HANDLE timer_event; | |
1192 | static HANDLE timer_thread; | |
1193 | static int timer_interval; | |
1194 | static int one_shot; | |
1195 | static sig_handler_t timer_fn = SIG_DFL; | |
1196 | ||
1197 | /* The timer works like this: | |
1198 | * The thread, ticktack(), is a trivial routine that most of the time | |
1199 | * only waits to receive the signal to terminate. The main thread tells | |
1200 | * the thread to terminate by setting the timer_event to the signalled | |
1201 | * state. | |
1202 | * But ticktack() interrupts the wait state after the timer's interval | |
1203 | * length to call the signal handler. | |
1204 | */ | |
1205 | ||
1206 | static unsigned __stdcall ticktack(void *dummy) | |
1207 | { | |
1208 | while (WaitForSingleObject(timer_event, timer_interval) == WAIT_TIMEOUT) { | |
1209 | if (timer_fn == SIG_DFL) | |
1210 | die("Alarm"); | |
1211 | if (timer_fn != SIG_IGN) | |
1212 | timer_fn(SIGALRM); | |
1213 | if (one_shot) | |
1214 | break; | |
1215 | } | |
1216 | return 0; | |
1217 | } | |
1218 | ||
1219 | static int start_timer_thread(void) | |
1220 | { | |
1221 | timer_event = CreateEvent(NULL, FALSE, FALSE, NULL); | |
1222 | if (timer_event) { | |
1223 | timer_thread = (HANDLE) _beginthreadex(NULL, 0, ticktack, NULL, 0, NULL); | |
1224 | if (!timer_thread ) | |
1225 | return errno = ENOMEM, | |
1226 | error("cannot start timer thread"); | |
1227 | } else | |
1228 | return errno = ENOMEM, | |
1229 | error("cannot allocate resources for timer"); | |
1230 | return 0; | |
1231 | } | |
1232 | ||
1233 | static void stop_timer_thread(void) | |
1234 | { | |
1235 | if (timer_event) | |
1236 | SetEvent(timer_event); /* tell thread to terminate */ | |
1237 | if (timer_thread) { | |
1238 | int rc = WaitForSingleObject(timer_thread, 1000); | |
1239 | if (rc == WAIT_TIMEOUT) | |
1240 | error("timer thread did not terminate timely"); | |
1241 | else if (rc != WAIT_OBJECT_0) | |
1242 | error("waiting for timer thread failed: %lu", | |
1243 | GetLastError()); | |
1244 | CloseHandle(timer_thread); | |
1245 | } | |
1246 | if (timer_event) | |
1247 | CloseHandle(timer_event); | |
1248 | timer_event = NULL; | |
1249 | timer_thread = NULL; | |
1250 | } | |
1251 | ||
1252 | static inline int is_timeval_eq(const struct timeval *i1, const struct timeval *i2) | |
1253 | { | |
1254 | return i1->tv_sec == i2->tv_sec && i1->tv_usec == i2->tv_usec; | |
1255 | } | |
1256 | ||
1257 | int setitimer(int type, struct itimerval *in, struct itimerval *out) | |
1258 | { | |
1259 | static const struct timeval zero; | |
1260 | static int atexit_done; | |
1261 | ||
1262 | if (out != NULL) | |
1263 | return errno = EINVAL, | |
1264 | error("setitimer param 3 != NULL not implemented"); | |
1265 | if (!is_timeval_eq(&in->it_interval, &zero) && | |
1266 | !is_timeval_eq(&in->it_interval, &in->it_value)) | |
1267 | return errno = EINVAL, | |
1268 | error("setitimer: it_interval must be zero or eq it_value"); | |
1269 | ||
1270 | if (timer_thread) | |
1271 | stop_timer_thread(); | |
1272 | ||
1273 | if (is_timeval_eq(&in->it_value, &zero) && | |
1274 | is_timeval_eq(&in->it_interval, &zero)) | |
1275 | return 0; | |
1276 | ||
1277 | timer_interval = in->it_value.tv_sec * 1000 + in->it_value.tv_usec / 1000; | |
1278 | one_shot = is_timeval_eq(&in->it_interval, &zero); | |
1279 | if (!atexit_done) { | |
1280 | atexit(stop_timer_thread); | |
1281 | atexit_done = 1; | |
1282 | } | |
1283 | return start_timer_thread(); | |
1284 | } | |
1285 | ||
1286 | int sigaction(int sig, struct sigaction *in, struct sigaction *out) | |
1287 | { | |
1288 | if (sig != SIGALRM) | |
1289 | return errno = EINVAL, | |
1290 | error("sigaction only implemented for SIGALRM"); | |
1291 | if (out != NULL) | |
1292 | return errno = EINVAL, | |
1293 | error("sigaction: param 3 != NULL not implemented"); | |
1294 | ||
1295 | timer_fn = in->sa_handler; | |
1296 | return 0; | |
1297 | } | |
1298 | ||
1299 | #undef signal | |
1300 | sig_handler_t mingw_signal(int sig, sig_handler_t handler) | |
1301 | { | |
1302 | sig_handler_t old = timer_fn; | |
1303 | if (sig != SIGALRM) | |
1304 | return signal(sig, handler); | |
1305 | timer_fn = handler; | |
1306 | return old; | |
1307 | } | |
1308 | ||
1309 | static const char *make_backslash_path(const char *path) | |
1310 | { | |
1311 | static char buf[PATH_MAX + 1]; | |
1312 | char *c; | |
1313 | ||
1314 | if (strlcpy(buf, path, PATH_MAX) >= PATH_MAX) | |
1315 | die("Too long path: %.*s", 60, path); | |
1316 | ||
1317 | for (c = buf; *c; c++) { | |
1318 | if (*c == '/') | |
1319 | *c = '\\'; | |
1320 | } | |
1321 | return buf; | |
1322 | } | |
1323 | ||
1324 | void mingw_open_html(const char *unixpath) | |
1325 | { | |
1326 | const char *htmlpath = make_backslash_path(unixpath); | |
1327 | typedef HINSTANCE (WINAPI *T)(HWND, const char *, | |
1328 | const char *, const char *, const char *, INT); | |
1329 | T ShellExecute; | |
1330 | HMODULE shell32; | |
1331 | ||
1332 | shell32 = LoadLibrary("shell32.dll"); | |
1333 | if (!shell32) | |
1334 | die("cannot load shell32.dll"); | |
1335 | ShellExecute = (T)GetProcAddress(shell32, "ShellExecuteA"); | |
1336 | if (!ShellExecute) | |
1337 | die("cannot run browser"); | |
1338 | ||
1339 | printf("Launching default browser to display HTML ...\n"); | |
1340 | ShellExecute(NULL, "open", htmlpath, NULL, "\\", 0); | |
1341 | ||
1342 | FreeLibrary(shell32); | |
1343 | } | |
1344 | ||
1345 | int link(const char *oldpath, const char *newpath) | |
1346 | { | |
1347 | typedef BOOL (WINAPI *T)(const char*, const char*, LPSECURITY_ATTRIBUTES); | |
1348 | static T create_hard_link = NULL; | |
1349 | if (!create_hard_link) { | |
1350 | create_hard_link = (T) GetProcAddress( | |
1351 | GetModuleHandle("kernel32.dll"), "CreateHardLinkA"); | |
1352 | if (!create_hard_link) | |
1353 | create_hard_link = (T)-1; | |
1354 | } | |
1355 | if (create_hard_link == (T)-1) { | |
1356 | errno = ENOSYS; | |
1357 | return -1; | |
1358 | } | |
1359 | if (!create_hard_link(newpath, oldpath, NULL)) { | |
1360 | errno = err_win_to_posix(GetLastError()); | |
1361 | return -1; | |
1362 | } | |
1363 | return 0; | |
1364 | } | |
1365 | ||
1366 | char *getpass(const char *prompt) | |
1367 | { | |
1368 | struct strbuf buf = STRBUF_INIT; | |
1369 | ||
1370 | fputs(prompt, stderr); | |
1371 | for (;;) { | |
1372 | char c = _getch(); | |
1373 | if (c == '\r' || c == '\n') | |
1374 | break; | |
1375 | strbuf_addch(&buf, c); | |
1376 | } | |
1377 | fputs("\n", stderr); | |
1378 | return strbuf_detach(&buf, NULL); | |
1379 | } | |
1380 | ||
1381 | #ifndef NO_MINGW_REPLACE_READDIR | |
1382 | /* MinGW readdir implementation to avoid extra lstats for Git */ | |
1383 | struct mingw_DIR | |
1384 | { | |
1385 | struct _finddata_t dd_dta; /* disk transfer area for this dir */ | |
1386 | struct mingw_dirent dd_dir; /* Our own implementation, including d_type */ | |
1387 | long dd_handle; /* _findnext handle */ | |
1388 | int dd_stat; /* 0 = next entry to read is first entry, -1 = off the end, positive = 0 based index of next entry */ | |
1389 | char dd_name[1]; /* given path for dir with search pattern (struct is extended) */ | |
1390 | }; | |
1391 | ||
1392 | struct dirent *mingw_readdir(DIR *dir) | |
1393 | { | |
1394 | WIN32_FIND_DATAA buf; | |
1395 | HANDLE handle; | |
1396 | struct mingw_DIR *mdir = (struct mingw_DIR*)dir; | |
1397 | ||
1398 | if (!dir->dd_handle) { | |
1399 | errno = EBADF; /* No set_errno for mingw */ | |
1400 | return NULL; | |
1401 | } | |
1402 | ||
1403 | if (dir->dd_handle == (long)INVALID_HANDLE_VALUE && dir->dd_stat == 0) | |
1404 | { | |
1405 | DWORD lasterr; | |
1406 | handle = FindFirstFileA(dir->dd_name, &buf); | |
1407 | lasterr = GetLastError(); | |
1408 | dir->dd_handle = (long)handle; | |
1409 | if (handle == INVALID_HANDLE_VALUE && (lasterr != ERROR_NO_MORE_FILES)) { | |
1410 | errno = err_win_to_posix(lasterr); | |
1411 | return NULL; | |
1412 | } | |
1413 | } else if (dir->dd_handle == (long)INVALID_HANDLE_VALUE) { | |
1414 | return NULL; | |
1415 | } else if (!FindNextFileA((HANDLE)dir->dd_handle, &buf)) { | |
1416 | DWORD lasterr = GetLastError(); | |
1417 | FindClose((HANDLE)dir->dd_handle); | |
1418 | dir->dd_handle = (long)INVALID_HANDLE_VALUE; | |
1419 | /* POSIX says you shouldn't set errno when readdir can't | |
1420 | find any more files; so, if another error we leave it set. */ | |
1421 | if (lasterr != ERROR_NO_MORE_FILES) | |
1422 | errno = err_win_to_posix(lasterr); | |
1423 | return NULL; | |
1424 | } | |
1425 | ||
1426 | /* We get here if `buf' contains valid data. */ | |
1427 | strcpy(dir->dd_dir.d_name, buf.cFileName); | |
1428 | ++dir->dd_stat; | |
1429 | ||
1430 | /* Set file type, based on WIN32_FIND_DATA */ | |
1431 | mdir->dd_dir.d_type = 0; | |
1432 | if (buf.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) | |
1433 | mdir->dd_dir.d_type |= DT_DIR; | |
1434 | else | |
1435 | mdir->dd_dir.d_type |= DT_REG; | |
1436 | ||
1437 | return (struct dirent*)&dir->dd_dir; | |
1438 | } | |
1439 | #endif // !NO_MINGW_REPLACE_READDIR |