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1 | #include "../git-compat-util.h" | |
2 | #include "win32.h" | |
3 | #include <conio.h> | |
4 | #include <wchar.h> | |
5 | #include "../strbuf.h" | |
6 | #include "../run-command.h" | |
7 | #include "../cache.h" | |
8 | ||
9 | #define HCAST(type, handle) ((type)(intptr_t)handle) | |
10 | ||
11 | static const int delay[] = { 0, 1, 10, 20, 40 }; | |
12 | ||
13 | int err_win_to_posix(DWORD winerr) | |
14 | { | |
15 | int error = ENOSYS; | |
16 | switch(winerr) { | |
17 | case ERROR_ACCESS_DENIED: error = EACCES; break; | |
18 | case ERROR_ACCOUNT_DISABLED: error = EACCES; break; | |
19 | case ERROR_ACCOUNT_RESTRICTION: error = EACCES; break; | |
20 | case ERROR_ALREADY_ASSIGNED: error = EBUSY; break; | |
21 | case ERROR_ALREADY_EXISTS: error = EEXIST; break; | |
22 | case ERROR_ARITHMETIC_OVERFLOW: error = ERANGE; break; | |
23 | case ERROR_BAD_COMMAND: error = EIO; break; | |
24 | case ERROR_BAD_DEVICE: error = ENODEV; break; | |
25 | case ERROR_BAD_DRIVER_LEVEL: error = ENXIO; break; | |
26 | case ERROR_BAD_EXE_FORMAT: error = ENOEXEC; break; | |
27 | case ERROR_BAD_FORMAT: error = ENOEXEC; break; | |
28 | case ERROR_BAD_LENGTH: error = EINVAL; break; | |
29 | case ERROR_BAD_PATHNAME: error = ENOENT; break; | |
30 | case ERROR_BAD_PIPE: error = EPIPE; break; | |
31 | case ERROR_BAD_UNIT: error = ENODEV; break; | |
32 | case ERROR_BAD_USERNAME: error = EINVAL; break; | |
33 | case ERROR_BROKEN_PIPE: error = EPIPE; break; | |
34 | case ERROR_BUFFER_OVERFLOW: error = ENAMETOOLONG; break; | |
35 | case ERROR_BUSY: error = EBUSY; break; | |
36 | case ERROR_BUSY_DRIVE: error = EBUSY; break; | |
37 | case ERROR_CALL_NOT_IMPLEMENTED: error = ENOSYS; break; | |
38 | case ERROR_CANNOT_MAKE: error = EACCES; break; | |
39 | case ERROR_CANTOPEN: error = EIO; break; | |
40 | case ERROR_CANTREAD: error = EIO; break; | |
41 | case ERROR_CANTWRITE: error = EIO; break; | |
42 | case ERROR_CRC: error = EIO; break; | |
43 | case ERROR_CURRENT_DIRECTORY: error = EACCES; break; | |
44 | case ERROR_DEVICE_IN_USE: error = EBUSY; break; | |
45 | case ERROR_DEV_NOT_EXIST: error = ENODEV; break; | |
46 | case ERROR_DIRECTORY: error = EINVAL; break; | |
47 | case ERROR_DIR_NOT_EMPTY: error = ENOTEMPTY; break; | |
48 | case ERROR_DISK_CHANGE: error = EIO; break; | |
49 | case ERROR_DISK_FULL: error = ENOSPC; break; | |
50 | case ERROR_DRIVE_LOCKED: error = EBUSY; break; | |
51 | case ERROR_ENVVAR_NOT_FOUND: error = EINVAL; break; | |
52 | case ERROR_EXE_MARKED_INVALID: error = ENOEXEC; break; | |
53 | case ERROR_FILENAME_EXCED_RANGE: error = ENAMETOOLONG; break; | |
54 | case ERROR_FILE_EXISTS: error = EEXIST; break; | |
55 | case ERROR_FILE_INVALID: error = ENODEV; break; | |
56 | case ERROR_FILE_NOT_FOUND: error = ENOENT; break; | |
57 | case ERROR_GEN_FAILURE: error = EIO; break; | |
58 | case ERROR_HANDLE_DISK_FULL: error = ENOSPC; break; | |
59 | case ERROR_INSUFFICIENT_BUFFER: error = ENOMEM; break; | |
60 | case ERROR_INVALID_ACCESS: error = EACCES; break; | |
61 | case ERROR_INVALID_ADDRESS: error = EFAULT; break; | |
62 | case ERROR_INVALID_BLOCK: error = EFAULT; break; | |
63 | case ERROR_INVALID_DATA: error = EINVAL; break; | |
64 | case ERROR_INVALID_DRIVE: error = ENODEV; break; | |
65 | case ERROR_INVALID_EXE_SIGNATURE: error = ENOEXEC; break; | |
66 | case ERROR_INVALID_FLAGS: error = EINVAL; break; | |
67 | case ERROR_INVALID_FUNCTION: error = ENOSYS; break; | |
68 | case ERROR_INVALID_HANDLE: error = EBADF; break; | |
69 | case ERROR_INVALID_LOGON_HOURS: error = EACCES; break; | |
70 | case ERROR_INVALID_NAME: error = EINVAL; break; | |
71 | case ERROR_INVALID_OWNER: error = EINVAL; break; | |
72 | case ERROR_INVALID_PARAMETER: error = EINVAL; break; | |
73 | case ERROR_INVALID_PASSWORD: error = EPERM; break; | |
74 | case ERROR_INVALID_PRIMARY_GROUP: error = EINVAL; break; | |
75 | case ERROR_INVALID_SIGNAL_NUMBER: error = EINVAL; break; | |
76 | case ERROR_INVALID_TARGET_HANDLE: error = EIO; break; | |
77 | case ERROR_INVALID_WORKSTATION: error = EACCES; break; | |
78 | case ERROR_IO_DEVICE: error = EIO; break; | |
79 | case ERROR_IO_INCOMPLETE: error = EINTR; break; | |
80 | case ERROR_LOCKED: error = EBUSY; break; | |
81 | case ERROR_LOCK_VIOLATION: error = EACCES; break; | |
82 | case ERROR_LOGON_FAILURE: error = EACCES; break; | |
83 | case ERROR_MAPPED_ALIGNMENT: error = EINVAL; break; | |
84 | case ERROR_META_EXPANSION_TOO_LONG: error = E2BIG; break; | |
85 | case ERROR_MORE_DATA: error = EPIPE; break; | |
86 | case ERROR_NEGATIVE_SEEK: error = ESPIPE; break; | |
87 | case ERROR_NOACCESS: error = EFAULT; break; | |
88 | case ERROR_NONE_MAPPED: error = EINVAL; break; | |
89 | case ERROR_NOT_ENOUGH_MEMORY: error = ENOMEM; break; | |
90 | case ERROR_NOT_READY: error = EAGAIN; break; | |
91 | case ERROR_NOT_SAME_DEVICE: error = EXDEV; break; | |
92 | case ERROR_NO_DATA: error = EPIPE; break; | |
93 | case ERROR_NO_MORE_SEARCH_HANDLES: error = EIO; break; | |
94 | case ERROR_NO_PROC_SLOTS: error = EAGAIN; break; | |
95 | case ERROR_NO_SUCH_PRIVILEGE: error = EACCES; break; | |
96 | case ERROR_OPEN_FAILED: error = EIO; break; | |
97 | case ERROR_OPEN_FILES: error = EBUSY; break; | |
98 | case ERROR_OPERATION_ABORTED: error = EINTR; break; | |
99 | case ERROR_OUTOFMEMORY: error = ENOMEM; break; | |
100 | case ERROR_PASSWORD_EXPIRED: error = EACCES; break; | |
101 | case ERROR_PATH_BUSY: error = EBUSY; break; | |
102 | case ERROR_PATH_NOT_FOUND: error = ENOENT; break; | |
103 | case ERROR_PIPE_BUSY: error = EBUSY; break; | |
104 | case ERROR_PIPE_CONNECTED: error = EPIPE; break; | |
105 | case ERROR_PIPE_LISTENING: error = EPIPE; break; | |
106 | case ERROR_PIPE_NOT_CONNECTED: error = EPIPE; break; | |
107 | case ERROR_PRIVILEGE_NOT_HELD: error = EACCES; break; | |
108 | case ERROR_READ_FAULT: error = EIO; break; | |
109 | case ERROR_SEEK: error = EIO; break; | |
110 | case ERROR_SEEK_ON_DEVICE: error = ESPIPE; break; | |
111 | case ERROR_SHARING_BUFFER_EXCEEDED: error = ENFILE; break; | |
112 | case ERROR_SHARING_VIOLATION: error = EACCES; break; | |
113 | case ERROR_STACK_OVERFLOW: error = ENOMEM; break; | |
114 | case ERROR_SWAPERROR: error = ENOENT; break; | |
115 | case ERROR_TOO_MANY_MODULES: error = EMFILE; break; | |
116 | case ERROR_TOO_MANY_OPEN_FILES: error = EMFILE; break; | |
117 | case ERROR_UNRECOGNIZED_MEDIA: error = ENXIO; break; | |
118 | case ERROR_UNRECOGNIZED_VOLUME: error = ENODEV; break; | |
119 | case ERROR_WAIT_NO_CHILDREN: error = ECHILD; break; | |
120 | case ERROR_WRITE_FAULT: error = EIO; break; | |
121 | case ERROR_WRITE_PROTECT: error = EROFS; break; | |
122 | } | |
123 | return error; | |
124 | } | |
125 | ||
126 | static inline int is_file_in_use_error(DWORD errcode) | |
127 | { | |
128 | switch (errcode) { | |
129 | case ERROR_SHARING_VIOLATION: | |
130 | case ERROR_ACCESS_DENIED: | |
131 | return 1; | |
132 | } | |
133 | ||
134 | return 0; | |
135 | } | |
136 | ||
137 | static int read_yes_no_answer(void) | |
138 | { | |
139 | char answer[1024]; | |
140 | ||
141 | if (fgets(answer, sizeof(answer), stdin)) { | |
142 | size_t answer_len = strlen(answer); | |
143 | int got_full_line = 0, c; | |
144 | ||
145 | /* remove the newline */ | |
146 | if (answer_len >= 2 && answer[answer_len-2] == '\r') { | |
147 | answer[answer_len-2] = '\0'; | |
148 | got_full_line = 1; | |
149 | } else if (answer_len >= 1 && answer[answer_len-1] == '\n') { | |
150 | answer[answer_len-1] = '\0'; | |
151 | got_full_line = 1; | |
152 | } | |
153 | /* flush the buffer in case we did not get the full line */ | |
154 | if (!got_full_line) | |
155 | while ((c = getchar()) != EOF && c != '\n') | |
156 | ; | |
157 | } else | |
158 | /* we could not read, return the | |
159 | * default answer which is no */ | |
160 | return 0; | |
161 | ||
162 | if (tolower(answer[0]) == 'y' && !answer[1]) | |
163 | return 1; | |
164 | if (!strncasecmp(answer, "yes", sizeof(answer))) | |
165 | return 1; | |
166 | if (tolower(answer[0]) == 'n' && !answer[1]) | |
167 | return 0; | |
168 | if (!strncasecmp(answer, "no", sizeof(answer))) | |
169 | return 0; | |
170 | ||
171 | /* did not find an answer we understand */ | |
172 | return -1; | |
173 | } | |
174 | ||
175 | static int ask_yes_no_if_possible(const char *format, ...) | |
176 | { | |
177 | char question[4096]; | |
178 | const char *retry_hook[] = { NULL, NULL, NULL }; | |
179 | va_list args; | |
180 | ||
181 | va_start(args, format); | |
182 | vsnprintf(question, sizeof(question), format, args); | |
183 | va_end(args); | |
184 | ||
185 | if ((retry_hook[0] = mingw_getenv("GIT_ASK_YESNO"))) { | |
186 | retry_hook[1] = question; | |
187 | return !run_command_v_opt(retry_hook, 0); | |
188 | } | |
189 | ||
190 | if (!isatty(_fileno(stdin)) || !isatty(_fileno(stderr))) | |
191 | return 0; | |
192 | ||
193 | while (1) { | |
194 | int answer; | |
195 | fprintf(stderr, "%s (y/n) ", question); | |
196 | ||
197 | if ((answer = read_yes_no_answer()) >= 0) | |
198 | return answer; | |
199 | ||
200 | fprintf(stderr, "Sorry, I did not understand your answer. " | |
201 | "Please type 'y' or 'n'\n"); | |
202 | } | |
203 | } | |
204 | ||
205 | int mingw_unlink(const char *pathname) | |
206 | { | |
207 | int ret, tries = 0; | |
208 | wchar_t wpathname[MAX_PATH]; | |
209 | if (xutftowcs_path(wpathname, pathname) < 0) | |
210 | return -1; | |
211 | ||
212 | /* read-only files cannot be removed */ | |
213 | _wchmod(wpathname, 0666); | |
214 | while ((ret = _wunlink(wpathname)) == -1 && tries < ARRAY_SIZE(delay)) { | |
215 | if (!is_file_in_use_error(GetLastError())) | |
216 | break; | |
217 | /* | |
218 | * We assume that some other process had the source or | |
219 | * destination file open at the wrong moment and retry. | |
220 | * In order to give the other process a higher chance to | |
221 | * complete its operation, we give up our time slice now. | |
222 | * If we have to retry again, we do sleep a bit. | |
223 | */ | |
224 | Sleep(delay[tries]); | |
225 | tries++; | |
226 | } | |
227 | while (ret == -1 && is_file_in_use_error(GetLastError()) && | |
228 | ask_yes_no_if_possible("Unlink of file '%s' failed. " | |
229 | "Should I try again?", pathname)) | |
230 | ret = _wunlink(wpathname); | |
231 | return ret; | |
232 | } | |
233 | ||
234 | static int is_dir_empty(const wchar_t *wpath) | |
235 | { | |
236 | WIN32_FIND_DATAW findbuf; | |
237 | HANDLE handle; | |
238 | wchar_t wbuf[MAX_PATH + 2]; | |
239 | wcscpy(wbuf, wpath); | |
240 | wcscat(wbuf, L"\\*"); | |
241 | handle = FindFirstFileW(wbuf, &findbuf); | |
242 | if (handle == INVALID_HANDLE_VALUE) | |
243 | return GetLastError() == ERROR_NO_MORE_FILES; | |
244 | ||
245 | while (!wcscmp(findbuf.cFileName, L".") || | |
246 | !wcscmp(findbuf.cFileName, L"..")) | |
247 | if (!FindNextFileW(handle, &findbuf)) { | |
248 | DWORD err = GetLastError(); | |
249 | FindClose(handle); | |
250 | return err == ERROR_NO_MORE_FILES; | |
251 | } | |
252 | FindClose(handle); | |
253 | return 0; | |
254 | } | |
255 | ||
256 | int mingw_rmdir(const char *pathname) | |
257 | { | |
258 | int ret, tries = 0; | |
259 | wchar_t wpathname[MAX_PATH]; | |
260 | if (xutftowcs_path(wpathname, pathname) < 0) | |
261 | return -1; | |
262 | ||
263 | while ((ret = _wrmdir(wpathname)) == -1 && tries < ARRAY_SIZE(delay)) { | |
264 | if (!is_file_in_use_error(GetLastError())) | |
265 | errno = err_win_to_posix(GetLastError()); | |
266 | if (errno != EACCES) | |
267 | break; | |
268 | if (!is_dir_empty(wpathname)) { | |
269 | errno = ENOTEMPTY; | |
270 | break; | |
271 | } | |
272 | /* | |
273 | * We assume that some other process had the source or | |
274 | * destination file open at the wrong moment and retry. | |
275 | * In order to give the other process a higher chance to | |
276 | * complete its operation, we give up our time slice now. | |
277 | * If we have to retry again, we do sleep a bit. | |
278 | */ | |
279 | Sleep(delay[tries]); | |
280 | tries++; | |
281 | } | |
282 | while (ret == -1 && errno == EACCES && is_file_in_use_error(GetLastError()) && | |
283 | ask_yes_no_if_possible("Deletion of directory '%s' failed. " | |
284 | "Should I try again?", pathname)) | |
285 | ret = _wrmdir(wpathname); | |
286 | return ret; | |
287 | } | |
288 | ||
289 | static inline int needs_hiding(const char *path) | |
290 | { | |
291 | const char *basename; | |
292 | ||
293 | if (hide_dotfiles == HIDE_DOTFILES_FALSE) | |
294 | return 0; | |
295 | ||
296 | /* We cannot use basename(), as it would remove trailing slashes */ | |
297 | mingw_skip_dos_drive_prefix((char **)&path); | |
298 | if (!*path) | |
299 | return 0; | |
300 | ||
301 | for (basename = path; *path; path++) | |
302 | if (is_dir_sep(*path)) { | |
303 | do { | |
304 | path++; | |
305 | } while (is_dir_sep(*path)); | |
306 | /* ignore trailing slashes */ | |
307 | if (*path) | |
308 | basename = path; | |
309 | } | |
310 | ||
311 | if (hide_dotfiles == HIDE_DOTFILES_TRUE) | |
312 | return *basename == '.'; | |
313 | ||
314 | assert(hide_dotfiles == HIDE_DOTFILES_DOTGITONLY); | |
315 | return !strncasecmp(".git", basename, 4) && | |
316 | (!basename[4] || is_dir_sep(basename[4])); | |
317 | } | |
318 | ||
319 | static int set_hidden_flag(const wchar_t *path, int set) | |
320 | { | |
321 | DWORD original = GetFileAttributesW(path), modified; | |
322 | if (set) | |
323 | modified = original | FILE_ATTRIBUTE_HIDDEN; | |
324 | else | |
325 | modified = original & ~FILE_ATTRIBUTE_HIDDEN; | |
326 | if (original == modified || SetFileAttributesW(path, modified)) | |
327 | return 0; | |
328 | errno = err_win_to_posix(GetLastError()); | |
329 | return -1; | |
330 | } | |
331 | ||
332 | int mingw_mkdir(const char *path, int mode) | |
333 | { | |
334 | int ret; | |
335 | wchar_t wpath[MAX_PATH]; | |
336 | if (xutftowcs_path(wpath, path) < 0) | |
337 | return -1; | |
338 | ret = _wmkdir(wpath); | |
339 | if (!ret && needs_hiding(path)) | |
340 | return set_hidden_flag(wpath, 1); | |
341 | return ret; | |
342 | } | |
343 | ||
344 | /* | |
345 | * Calling CreateFile() using FILE_APPEND_DATA and without FILE_WRITE_DATA | |
346 | * is documented in [1] as opening a writable file handle in append mode. | |
347 | * (It is believed that) this is atomic since it is maintained by the | |
348 | * kernel unlike the O_APPEND flag which is racily maintained by the CRT. | |
349 | * | |
350 | * [1] https://docs.microsoft.com/en-us/windows/desktop/fileio/file-access-rights-constants | |
351 | * | |
352 | * This trick does not appear to work for named pipes. Instead it creates | |
353 | * a named pipe client handle that cannot be written to. Callers should | |
354 | * just use the regular _wopen() for them. (And since client handle gets | |
355 | * bound to a unique server handle, it isn't really an issue.) | |
356 | */ | |
357 | static int mingw_open_append(wchar_t const *wfilename, int oflags, ...) | |
358 | { | |
359 | HANDLE handle; | |
360 | int fd; | |
361 | DWORD create = (oflags & O_CREAT) ? OPEN_ALWAYS : OPEN_EXISTING; | |
362 | ||
363 | /* only these flags are supported */ | |
364 | if ((oflags & ~O_CREAT) != (O_WRONLY | O_APPEND)) | |
365 | return errno = ENOSYS, -1; | |
366 | ||
367 | /* | |
368 | * FILE_SHARE_WRITE is required to permit child processes | |
369 | * to append to the file. | |
370 | */ | |
371 | handle = CreateFileW(wfilename, FILE_APPEND_DATA, | |
372 | FILE_SHARE_WRITE | FILE_SHARE_READ, | |
373 | NULL, create, FILE_ATTRIBUTE_NORMAL, NULL); | |
374 | if (handle == INVALID_HANDLE_VALUE) | |
375 | return errno = err_win_to_posix(GetLastError()), -1; | |
376 | ||
377 | /* | |
378 | * No O_APPEND here, because the CRT uses it only to reset the | |
379 | * file pointer to EOF before each write(); but that is not | |
380 | * necessary (and may lead to races) for a file created with | |
381 | * FILE_APPEND_DATA. | |
382 | */ | |
383 | fd = _open_osfhandle((intptr_t)handle, O_BINARY); | |
384 | if (fd < 0) | |
385 | CloseHandle(handle); | |
386 | return fd; | |
387 | } | |
388 | ||
389 | /* | |
390 | * Does the pathname map to the local named pipe filesystem? | |
391 | * That is, does it have a "//./pipe/" prefix? | |
392 | */ | |
393 | static int is_local_named_pipe_path(const char *filename) | |
394 | { | |
395 | return (is_dir_sep(filename[0]) && | |
396 | is_dir_sep(filename[1]) && | |
397 | filename[2] == '.' && | |
398 | is_dir_sep(filename[3]) && | |
399 | !strncasecmp(filename+4, "pipe", 4) && | |
400 | is_dir_sep(filename[8]) && | |
401 | filename[9]); | |
402 | } | |
403 | ||
404 | int mingw_open (const char *filename, int oflags, ...) | |
405 | { | |
406 | typedef int (*open_fn_t)(wchar_t const *wfilename, int oflags, ...); | |
407 | va_list args; | |
408 | unsigned mode; | |
409 | int fd; | |
410 | wchar_t wfilename[MAX_PATH]; | |
411 | open_fn_t open_fn; | |
412 | ||
413 | va_start(args, oflags); | |
414 | mode = va_arg(args, int); | |
415 | va_end(args); | |
416 | ||
417 | if (filename && !strcmp(filename, "/dev/null")) | |
418 | filename = "nul"; | |
419 | ||
420 | if ((oflags & O_APPEND) && !is_local_named_pipe_path(filename)) | |
421 | open_fn = mingw_open_append; | |
422 | else | |
423 | open_fn = _wopen; | |
424 | ||
425 | if (xutftowcs_path(wfilename, filename) < 0) | |
426 | return -1; | |
427 | fd = open_fn(wfilename, oflags, mode); | |
428 | ||
429 | if (fd < 0 && (oflags & O_ACCMODE) != O_RDONLY && errno == EACCES) { | |
430 | DWORD attrs = GetFileAttributesW(wfilename); | |
431 | if (attrs != INVALID_FILE_ATTRIBUTES && (attrs & FILE_ATTRIBUTE_DIRECTORY)) | |
432 | errno = EISDIR; | |
433 | } | |
434 | if ((oflags & O_CREAT) && needs_hiding(filename)) { | |
435 | /* | |
436 | * Internally, _wopen() uses the CreateFile() API which errors | |
437 | * out with an ERROR_ACCESS_DENIED if CREATE_ALWAYS was | |
438 | * specified and an already existing file's attributes do not | |
439 | * match *exactly*. As there is no mode or flag we can set that | |
440 | * would correspond to FILE_ATTRIBUTE_HIDDEN, let's just try | |
441 | * again *without* the O_CREAT flag (that corresponds to the | |
442 | * CREATE_ALWAYS flag of CreateFile()). | |
443 | */ | |
444 | if (fd < 0 && errno == EACCES) | |
445 | fd = open_fn(wfilename, oflags & ~O_CREAT, mode); | |
446 | if (fd >= 0 && set_hidden_flag(wfilename, 1)) | |
447 | warning("could not mark '%s' as hidden.", filename); | |
448 | } | |
449 | return fd; | |
450 | } | |
451 | ||
452 | static BOOL WINAPI ctrl_ignore(DWORD type) | |
453 | { | |
454 | return TRUE; | |
455 | } | |
456 | ||
457 | #undef fgetc | |
458 | int mingw_fgetc(FILE *stream) | |
459 | { | |
460 | int ch; | |
461 | if (!isatty(_fileno(stream))) | |
462 | return fgetc(stream); | |
463 | ||
464 | SetConsoleCtrlHandler(ctrl_ignore, TRUE); | |
465 | while (1) { | |
466 | ch = fgetc(stream); | |
467 | if (ch != EOF || GetLastError() != ERROR_OPERATION_ABORTED) | |
468 | break; | |
469 | ||
470 | /* Ctrl+C was pressed, simulate SIGINT and retry */ | |
471 | mingw_raise(SIGINT); | |
472 | } | |
473 | SetConsoleCtrlHandler(ctrl_ignore, FALSE); | |
474 | return ch; | |
475 | } | |
476 | ||
477 | #undef fopen | |
478 | FILE *mingw_fopen (const char *filename, const char *otype) | |
479 | { | |
480 | int hide = needs_hiding(filename); | |
481 | FILE *file; | |
482 | wchar_t wfilename[MAX_PATH], wotype[4]; | |
483 | if (filename && !strcmp(filename, "/dev/null")) | |
484 | filename = "nul"; | |
485 | if (xutftowcs_path(wfilename, filename) < 0 || | |
486 | xutftowcs(wotype, otype, ARRAY_SIZE(wotype)) < 0) | |
487 | return NULL; | |
488 | if (hide && !access(filename, F_OK) && set_hidden_flag(wfilename, 0)) { | |
489 | error("could not unhide %s", filename); | |
490 | return NULL; | |
491 | } | |
492 | file = _wfopen(wfilename, wotype); | |
493 | if (!file && GetLastError() == ERROR_INVALID_NAME) | |
494 | errno = ENOENT; | |
495 | if (file && hide && set_hidden_flag(wfilename, 1)) | |
496 | warning("could not mark '%s' as hidden.", filename); | |
497 | return file; | |
498 | } | |
499 | ||
500 | FILE *mingw_freopen (const char *filename, const char *otype, FILE *stream) | |
501 | { | |
502 | int hide = needs_hiding(filename); | |
503 | FILE *file; | |
504 | wchar_t wfilename[MAX_PATH], wotype[4]; | |
505 | if (filename && !strcmp(filename, "/dev/null")) | |
506 | filename = "nul"; | |
507 | if (xutftowcs_path(wfilename, filename) < 0 || | |
508 | xutftowcs(wotype, otype, ARRAY_SIZE(wotype)) < 0) | |
509 | return NULL; | |
510 | if (hide && !access(filename, F_OK) && set_hidden_flag(wfilename, 0)) { | |
511 | error("could not unhide %s", filename); | |
512 | return NULL; | |
513 | } | |
514 | file = _wfreopen(wfilename, wotype, stream); | |
515 | if (file && hide && set_hidden_flag(wfilename, 1)) | |
516 | warning("could not mark '%s' as hidden.", filename); | |
517 | return file; | |
518 | } | |
519 | ||
520 | #undef fflush | |
521 | int mingw_fflush(FILE *stream) | |
522 | { | |
523 | int ret = fflush(stream); | |
524 | ||
525 | /* | |
526 | * write() is used behind the scenes of stdio output functions. | |
527 | * Since git code does not check for errors after each stdio write | |
528 | * operation, it can happen that write() is called by a later | |
529 | * stdio function even if an earlier write() call failed. In the | |
530 | * case of a pipe whose readable end was closed, only the first | |
531 | * call to write() reports EPIPE on Windows. Subsequent write() | |
532 | * calls report EINVAL. It is impossible to notice whether this | |
533 | * fflush invocation triggered such a case, therefore, we have to | |
534 | * catch all EINVAL errors whole-sale. | |
535 | */ | |
536 | if (ret && errno == EINVAL) | |
537 | errno = EPIPE; | |
538 | ||
539 | return ret; | |
540 | } | |
541 | ||
542 | #undef write | |
543 | ssize_t mingw_write(int fd, const void *buf, size_t len) | |
544 | { | |
545 | ssize_t result = write(fd, buf, len); | |
546 | ||
547 | if (result < 0 && errno == EINVAL && buf) { | |
548 | /* check if fd is a pipe */ | |
549 | HANDLE h = (HANDLE) _get_osfhandle(fd); | |
550 | if (GetFileType(h) == FILE_TYPE_PIPE) | |
551 | errno = EPIPE; | |
552 | else | |
553 | errno = EINVAL; | |
554 | } | |
555 | ||
556 | return result; | |
557 | } | |
558 | ||
559 | int mingw_access(const char *filename, int mode) | |
560 | { | |
561 | wchar_t wfilename[MAX_PATH]; | |
562 | if (xutftowcs_path(wfilename, filename) < 0) | |
563 | return -1; | |
564 | /* X_OK is not supported by the MSVCRT version */ | |
565 | return _waccess(wfilename, mode & ~X_OK); | |
566 | } | |
567 | ||
568 | int mingw_chdir(const char *dirname) | |
569 | { | |
570 | wchar_t wdirname[MAX_PATH]; | |
571 | if (xutftowcs_path(wdirname, dirname) < 0) | |
572 | return -1; | |
573 | return _wchdir(wdirname); | |
574 | } | |
575 | ||
576 | int mingw_chmod(const char *filename, int mode) | |
577 | { | |
578 | wchar_t wfilename[MAX_PATH]; | |
579 | if (xutftowcs_path(wfilename, filename) < 0) | |
580 | return -1; | |
581 | return _wchmod(wfilename, mode); | |
582 | } | |
583 | ||
584 | /* | |
585 | * The unit of FILETIME is 100-nanoseconds since January 1, 1601, UTC. | |
586 | * Returns the 100-nanoseconds ("hekto nanoseconds") since the epoch. | |
587 | */ | |
588 | static inline long long filetime_to_hnsec(const FILETIME *ft) | |
589 | { | |
590 | long long winTime = ((long long)ft->dwHighDateTime << 32) + ft->dwLowDateTime; | |
591 | /* Windows to Unix Epoch conversion */ | |
592 | return winTime - 116444736000000000LL; | |
593 | } | |
594 | ||
595 | static inline time_t filetime_to_time_t(const FILETIME *ft) | |
596 | { | |
597 | return (time_t)(filetime_to_hnsec(ft) / 10000000); | |
598 | } | |
599 | ||
600 | /** | |
601 | * Verifies that safe_create_leading_directories() would succeed. | |
602 | */ | |
603 | static int has_valid_directory_prefix(wchar_t *wfilename) | |
604 | { | |
605 | int n = wcslen(wfilename); | |
606 | ||
607 | while (n > 0) { | |
608 | wchar_t c = wfilename[--n]; | |
609 | DWORD attributes; | |
610 | ||
611 | if (!is_dir_sep(c)) | |
612 | continue; | |
613 | ||
614 | wfilename[n] = L'\0'; | |
615 | attributes = GetFileAttributesW(wfilename); | |
616 | wfilename[n] = c; | |
617 | if (attributes == FILE_ATTRIBUTE_DIRECTORY || | |
618 | attributes == FILE_ATTRIBUTE_DEVICE) | |
619 | return 1; | |
620 | if (attributes == INVALID_FILE_ATTRIBUTES) | |
621 | switch (GetLastError()) { | |
622 | case ERROR_PATH_NOT_FOUND: | |
623 | continue; | |
624 | case ERROR_FILE_NOT_FOUND: | |
625 | /* This implies parent directory exists. */ | |
626 | return 1; | |
627 | } | |
628 | return 0; | |
629 | } | |
630 | return 1; | |
631 | } | |
632 | ||
633 | /* We keep the do_lstat code in a separate function to avoid recursion. | |
634 | * When a path ends with a slash, the stat will fail with ENOENT. In | |
635 | * this case, we strip the trailing slashes and stat again. | |
636 | * | |
637 | * If follow is true then act like stat() and report on the link | |
638 | * target. Otherwise report on the link itself. | |
639 | */ | |
640 | static int do_lstat(int follow, const char *file_name, struct stat *buf) | |
641 | { | |
642 | WIN32_FILE_ATTRIBUTE_DATA fdata; | |
643 | wchar_t wfilename[MAX_PATH]; | |
644 | if (xutftowcs_path(wfilename, file_name) < 0) | |
645 | return -1; | |
646 | ||
647 | if (GetFileAttributesExW(wfilename, GetFileExInfoStandard, &fdata)) { | |
648 | buf->st_ino = 0; | |
649 | buf->st_gid = 0; | |
650 | buf->st_uid = 0; | |
651 | buf->st_nlink = 1; | |
652 | buf->st_mode = file_attr_to_st_mode(fdata.dwFileAttributes); | |
653 | buf->st_size = fdata.nFileSizeLow | | |
654 | (((off_t)fdata.nFileSizeHigh)<<32); | |
655 | buf->st_dev = buf->st_rdev = 0; /* not used by Git */ | |
656 | buf->st_atime = filetime_to_time_t(&(fdata.ftLastAccessTime)); | |
657 | buf->st_mtime = filetime_to_time_t(&(fdata.ftLastWriteTime)); | |
658 | buf->st_ctime = filetime_to_time_t(&(fdata.ftCreationTime)); | |
659 | if (fdata.dwFileAttributes & FILE_ATTRIBUTE_REPARSE_POINT) { | |
660 | WIN32_FIND_DATAW findbuf; | |
661 | HANDLE handle = FindFirstFileW(wfilename, &findbuf); | |
662 | if (handle != INVALID_HANDLE_VALUE) { | |
663 | if ((findbuf.dwFileAttributes & FILE_ATTRIBUTE_REPARSE_POINT) && | |
664 | (findbuf.dwReserved0 == IO_REPARSE_TAG_SYMLINK)) { | |
665 | if (follow) { | |
666 | char buffer[MAXIMUM_REPARSE_DATA_BUFFER_SIZE]; | |
667 | buf->st_size = readlink(file_name, buffer, MAXIMUM_REPARSE_DATA_BUFFER_SIZE); | |
668 | } else { | |
669 | buf->st_mode = S_IFLNK; | |
670 | } | |
671 | buf->st_mode |= S_IREAD; | |
672 | if (!(findbuf.dwFileAttributes & FILE_ATTRIBUTE_READONLY)) | |
673 | buf->st_mode |= S_IWRITE; | |
674 | } | |
675 | FindClose(handle); | |
676 | } | |
677 | } | |
678 | return 0; | |
679 | } | |
680 | switch (GetLastError()) { | |
681 | case ERROR_ACCESS_DENIED: | |
682 | case ERROR_SHARING_VIOLATION: | |
683 | case ERROR_LOCK_VIOLATION: | |
684 | case ERROR_SHARING_BUFFER_EXCEEDED: | |
685 | errno = EACCES; | |
686 | break; | |
687 | case ERROR_BUFFER_OVERFLOW: | |
688 | errno = ENAMETOOLONG; | |
689 | break; | |
690 | case ERROR_NOT_ENOUGH_MEMORY: | |
691 | errno = ENOMEM; | |
692 | break; | |
693 | case ERROR_PATH_NOT_FOUND: | |
694 | if (!has_valid_directory_prefix(wfilename)) { | |
695 | errno = ENOTDIR; | |
696 | break; | |
697 | } | |
698 | /* fallthru */ | |
699 | default: | |
700 | errno = ENOENT; | |
701 | break; | |
702 | } | |
703 | return -1; | |
704 | } | |
705 | ||
706 | /* We provide our own lstat/fstat functions, since the provided | |
707 | * lstat/fstat functions are so slow. These stat functions are | |
708 | * tailored for Git's usage (read: fast), and are not meant to be | |
709 | * complete. Note that Git stat()s are redirected to mingw_lstat() | |
710 | * too, since Windows doesn't really handle symlinks that well. | |
711 | */ | |
712 | static int do_stat_internal(int follow, const char *file_name, struct stat *buf) | |
713 | { | |
714 | int namelen; | |
715 | char alt_name[PATH_MAX]; | |
716 | ||
717 | if (!do_lstat(follow, file_name, buf)) | |
718 | return 0; | |
719 | ||
720 | /* if file_name ended in a '/', Windows returned ENOENT; | |
721 | * try again without trailing slashes | |
722 | */ | |
723 | if (errno != ENOENT) | |
724 | return -1; | |
725 | ||
726 | namelen = strlen(file_name); | |
727 | if (namelen && file_name[namelen-1] != '/') | |
728 | return -1; | |
729 | while (namelen && file_name[namelen-1] == '/') | |
730 | --namelen; | |
731 | if (!namelen || namelen >= PATH_MAX) | |
732 | return -1; | |
733 | ||
734 | memcpy(alt_name, file_name, namelen); | |
735 | alt_name[namelen] = 0; | |
736 | return do_lstat(follow, alt_name, buf); | |
737 | } | |
738 | ||
739 | int mingw_lstat(const char *file_name, struct stat *buf) | |
740 | { | |
741 | return do_stat_internal(0, file_name, buf); | |
742 | } | |
743 | int mingw_stat(const char *file_name, struct stat *buf) | |
744 | { | |
745 | return do_stat_internal(1, file_name, buf); | |
746 | } | |
747 | ||
748 | int mingw_fstat(int fd, struct stat *buf) | |
749 | { | |
750 | HANDLE fh = (HANDLE)_get_osfhandle(fd); | |
751 | BY_HANDLE_FILE_INFORMATION fdata; | |
752 | ||
753 | if (fh == INVALID_HANDLE_VALUE) { | |
754 | errno = EBADF; | |
755 | return -1; | |
756 | } | |
757 | /* direct non-file handles to MS's fstat() */ | |
758 | if (GetFileType(fh) != FILE_TYPE_DISK) | |
759 | return _fstati64(fd, buf); | |
760 | ||
761 | if (GetFileInformationByHandle(fh, &fdata)) { | |
762 | buf->st_ino = 0; | |
763 | buf->st_gid = 0; | |
764 | buf->st_uid = 0; | |
765 | buf->st_nlink = 1; | |
766 | buf->st_mode = file_attr_to_st_mode(fdata.dwFileAttributes); | |
767 | buf->st_size = fdata.nFileSizeLow | | |
768 | (((off_t)fdata.nFileSizeHigh)<<32); | |
769 | buf->st_dev = buf->st_rdev = 0; /* not used by Git */ | |
770 | buf->st_atime = filetime_to_time_t(&(fdata.ftLastAccessTime)); | |
771 | buf->st_mtime = filetime_to_time_t(&(fdata.ftLastWriteTime)); | |
772 | buf->st_ctime = filetime_to_time_t(&(fdata.ftCreationTime)); | |
773 | return 0; | |
774 | } | |
775 | errno = EBADF; | |
776 | return -1; | |
777 | } | |
778 | ||
779 | static inline void time_t_to_filetime(time_t t, FILETIME *ft) | |
780 | { | |
781 | long long winTime = t * 10000000LL + 116444736000000000LL; | |
782 | ft->dwLowDateTime = winTime; | |
783 | ft->dwHighDateTime = winTime >> 32; | |
784 | } | |
785 | ||
786 | int mingw_utime (const char *file_name, const struct utimbuf *times) | |
787 | { | |
788 | FILETIME mft, aft; | |
789 | int fh, rc; | |
790 | DWORD attrs; | |
791 | wchar_t wfilename[MAX_PATH]; | |
792 | if (xutftowcs_path(wfilename, file_name) < 0) | |
793 | return -1; | |
794 | ||
795 | /* must have write permission */ | |
796 | attrs = GetFileAttributesW(wfilename); | |
797 | if (attrs != INVALID_FILE_ATTRIBUTES && | |
798 | (attrs & FILE_ATTRIBUTE_READONLY)) { | |
799 | /* ignore errors here; open() will report them */ | |
800 | SetFileAttributesW(wfilename, attrs & ~FILE_ATTRIBUTE_READONLY); | |
801 | } | |
802 | ||
803 | if ((fh = _wopen(wfilename, O_RDWR | O_BINARY)) < 0) { | |
804 | rc = -1; | |
805 | goto revert_attrs; | |
806 | } | |
807 | ||
808 | if (times) { | |
809 | time_t_to_filetime(times->modtime, &mft); | |
810 | time_t_to_filetime(times->actime, &aft); | |
811 | } else { | |
812 | GetSystemTimeAsFileTime(&mft); | |
813 | aft = mft; | |
814 | } | |
815 | if (!SetFileTime((HANDLE)_get_osfhandle(fh), NULL, &aft, &mft)) { | |
816 | errno = EINVAL; | |
817 | rc = -1; | |
818 | } else | |
819 | rc = 0; | |
820 | close(fh); | |
821 | ||
822 | revert_attrs: | |
823 | if (attrs != INVALID_FILE_ATTRIBUTES && | |
824 | (attrs & FILE_ATTRIBUTE_READONLY)) { | |
825 | /* ignore errors again */ | |
826 | SetFileAttributesW(wfilename, attrs); | |
827 | } | |
828 | return rc; | |
829 | } | |
830 | ||
831 | #undef strftime | |
832 | size_t mingw_strftime(char *s, size_t max, | |
833 | const char *format, const struct tm *tm) | |
834 | { | |
835 | size_t ret = strftime(s, max, format, tm); | |
836 | ||
837 | if (!ret && errno == EINVAL) | |
838 | die("invalid strftime format: '%s'", format); | |
839 | return ret; | |
840 | } | |
841 | ||
842 | unsigned int sleep (unsigned int seconds) | |
843 | { | |
844 | Sleep(seconds*1000); | |
845 | return 0; | |
846 | } | |
847 | ||
848 | char *mingw_mktemp(char *template) | |
849 | { | |
850 | wchar_t wtemplate[MAX_PATH]; | |
851 | if (xutftowcs_path(wtemplate, template) < 0) | |
852 | return NULL; | |
853 | if (!_wmktemp(wtemplate)) | |
854 | return NULL; | |
855 | if (xwcstoutf(template, wtemplate, strlen(template) + 1) < 0) | |
856 | return NULL; | |
857 | return template; | |
858 | } | |
859 | ||
860 | int mkstemp(char *template) | |
861 | { | |
862 | char *filename = mktemp(template); | |
863 | if (filename == NULL) | |
864 | return -1; | |
865 | return open(filename, O_RDWR | O_CREAT, 0600); | |
866 | } | |
867 | ||
868 | int gettimeofday(struct timeval *tv, void *tz) | |
869 | { | |
870 | FILETIME ft; | |
871 | long long hnsec; | |
872 | ||
873 | GetSystemTimeAsFileTime(&ft); | |
874 | hnsec = filetime_to_hnsec(&ft); | |
875 | tv->tv_sec = hnsec / 10000000; | |
876 | tv->tv_usec = (hnsec % 10000000) / 10; | |
877 | return 0; | |
878 | } | |
879 | ||
880 | int pipe(int filedes[2]) | |
881 | { | |
882 | HANDLE h[2]; | |
883 | ||
884 | /* this creates non-inheritable handles */ | |
885 | if (!CreatePipe(&h[0], &h[1], NULL, 8192)) { | |
886 | errno = err_win_to_posix(GetLastError()); | |
887 | return -1; | |
888 | } | |
889 | filedes[0] = _open_osfhandle(HCAST(int, h[0]), O_NOINHERIT); | |
890 | if (filedes[0] < 0) { | |
891 | CloseHandle(h[0]); | |
892 | CloseHandle(h[1]); | |
893 | return -1; | |
894 | } | |
895 | filedes[1] = _open_osfhandle(HCAST(int, h[1]), O_NOINHERIT); | |
896 | if (filedes[1] < 0) { | |
897 | close(filedes[0]); | |
898 | CloseHandle(h[1]); | |
899 | return -1; | |
900 | } | |
901 | return 0; | |
902 | } | |
903 | ||
904 | struct tm *gmtime_r(const time_t *timep, struct tm *result) | |
905 | { | |
906 | /* gmtime() in MSVCRT.DLL is thread-safe, but not reentrant */ | |
907 | memcpy(result, gmtime(timep), sizeof(struct tm)); | |
908 | return result; | |
909 | } | |
910 | ||
911 | struct tm *localtime_r(const time_t *timep, struct tm *result) | |
912 | { | |
913 | /* localtime() in MSVCRT.DLL is thread-safe, but not reentrant */ | |
914 | memcpy(result, localtime(timep), sizeof(struct tm)); | |
915 | return result; | |
916 | } | |
917 | ||
918 | char *mingw_getcwd(char *pointer, int len) | |
919 | { | |
920 | wchar_t cwd[MAX_PATH], wpointer[MAX_PATH]; | |
921 | DWORD ret = GetCurrentDirectoryW(ARRAY_SIZE(cwd), cwd); | |
922 | ||
923 | if (!ret || ret >= ARRAY_SIZE(cwd)) { | |
924 | errno = ret ? ENAMETOOLONG : err_win_to_posix(GetLastError()); | |
925 | return NULL; | |
926 | } | |
927 | ret = GetLongPathNameW(cwd, wpointer, ARRAY_SIZE(wpointer)); | |
928 | if (!ret || ret >= ARRAY_SIZE(wpointer)) | |
929 | return NULL; | |
930 | if (xwcstoutf(pointer, wpointer, len) < 0) | |
931 | return NULL; | |
932 | convert_slashes(pointer); | |
933 | return pointer; | |
934 | } | |
935 | ||
936 | /* | |
937 | * See http://msdn2.microsoft.com/en-us/library/17w5ykft(vs.71).aspx | |
938 | * (Parsing C++ Command-Line Arguments) | |
939 | */ | |
940 | static const char *quote_arg(const char *arg) | |
941 | { | |
942 | /* count chars to quote */ | |
943 | int len = 0, n = 0; | |
944 | int force_quotes = 0; | |
945 | char *q, *d; | |
946 | const char *p = arg; | |
947 | if (!*p) force_quotes = 1; | |
948 | while (*p) { | |
949 | if (isspace(*p) || *p == '*' || *p == '?' || *p == '{' || *p == '\'') | |
950 | force_quotes = 1; | |
951 | else if (*p == '"') | |
952 | n++; | |
953 | else if (*p == '\\') { | |
954 | int count = 0; | |
955 | while (*p == '\\') { | |
956 | count++; | |
957 | p++; | |
958 | len++; | |
959 | } | |
960 | if (*p == '"') | |
961 | n += count*2 + 1; | |
962 | continue; | |
963 | } | |
964 | len++; | |
965 | p++; | |
966 | } | |
967 | if (!force_quotes && n == 0) | |
968 | return arg; | |
969 | ||
970 | /* insert \ where necessary */ | |
971 | d = q = xmalloc(st_add3(len, n, 3)); | |
972 | *d++ = '"'; | |
973 | while (*arg) { | |
974 | if (*arg == '"') | |
975 | *d++ = '\\'; | |
976 | else if (*arg == '\\') { | |
977 | int count = 0; | |
978 | while (*arg == '\\') { | |
979 | count++; | |
980 | *d++ = *arg++; | |
981 | } | |
982 | if (*arg == '"') { | |
983 | while (count-- > 0) | |
984 | *d++ = '\\'; | |
985 | *d++ = '\\'; | |
986 | } | |
987 | } | |
988 | *d++ = *arg++; | |
989 | } | |
990 | *d++ = '"'; | |
991 | *d++ = 0; | |
992 | return q; | |
993 | } | |
994 | ||
995 | static const char *parse_interpreter(const char *cmd) | |
996 | { | |
997 | static char buf[100]; | |
998 | char *p, *opt; | |
999 | int n, fd; | |
1000 | ||
1001 | /* don't even try a .exe */ | |
1002 | n = strlen(cmd); | |
1003 | if (n >= 4 && !strcasecmp(cmd+n-4, ".exe")) | |
1004 | return NULL; | |
1005 | ||
1006 | fd = open(cmd, O_RDONLY); | |
1007 | if (fd < 0) | |
1008 | return NULL; | |
1009 | n = read(fd, buf, sizeof(buf)-1); | |
1010 | close(fd); | |
1011 | if (n < 4) /* at least '#!/x' and not error */ | |
1012 | return NULL; | |
1013 | ||
1014 | if (buf[0] != '#' || buf[1] != '!') | |
1015 | return NULL; | |
1016 | buf[n] = '\0'; | |
1017 | p = buf + strcspn(buf, "\r\n"); | |
1018 | if (!*p) | |
1019 | return NULL; | |
1020 | ||
1021 | *p = '\0'; | |
1022 | if (!(p = strrchr(buf+2, '/')) && !(p = strrchr(buf+2, '\\'))) | |
1023 | return NULL; | |
1024 | /* strip options */ | |
1025 | if ((opt = strchr(p+1, ' '))) | |
1026 | *opt = '\0'; | |
1027 | return p+1; | |
1028 | } | |
1029 | ||
1030 | /* | |
1031 | * exe_only means that we only want to detect .exe files, but not scripts | |
1032 | * (which do not have an extension) | |
1033 | */ | |
1034 | static char *lookup_prog(const char *dir, int dirlen, const char *cmd, | |
1035 | int isexe, int exe_only) | |
1036 | { | |
1037 | char path[MAX_PATH]; | |
1038 | snprintf(path, sizeof(path), "%.*s\\%s.exe", dirlen, dir, cmd); | |
1039 | ||
1040 | if (!isexe && access(path, F_OK) == 0) | |
1041 | return xstrdup(path); | |
1042 | path[strlen(path)-4] = '\0'; | |
1043 | if ((!exe_only || isexe) && access(path, F_OK) == 0) | |
1044 | if (!(GetFileAttributes(path) & FILE_ATTRIBUTE_DIRECTORY)) | |
1045 | return xstrdup(path); | |
1046 | return NULL; | |
1047 | } | |
1048 | ||
1049 | /* | |
1050 | * Determines the absolute path of cmd using the split path in path. | |
1051 | * If cmd contains a slash or backslash, no lookup is performed. | |
1052 | */ | |
1053 | static char *path_lookup(const char *cmd, int exe_only) | |
1054 | { | |
1055 | const char *path; | |
1056 | char *prog = NULL; | |
1057 | int len = strlen(cmd); | |
1058 | int isexe = len >= 4 && !strcasecmp(cmd+len-4, ".exe"); | |
1059 | ||
1060 | if (strchr(cmd, '/') || strchr(cmd, '\\')) | |
1061 | return xstrdup(cmd); | |
1062 | ||
1063 | path = mingw_getenv("PATH"); | |
1064 | if (!path) | |
1065 | return NULL; | |
1066 | ||
1067 | while (!prog) { | |
1068 | const char *sep = strchrnul(path, ';'); | |
1069 | int dirlen = sep - path; | |
1070 | if (dirlen) | |
1071 | prog = lookup_prog(path, dirlen, cmd, isexe, exe_only); | |
1072 | if (!*sep) | |
1073 | break; | |
1074 | path = sep + 1; | |
1075 | } | |
1076 | ||
1077 | return prog; | |
1078 | } | |
1079 | ||
1080 | static int do_putenv(char **env, const char *name, int size, int free_old); | |
1081 | ||
1082 | /* used number of elements of environ array, including terminating NULL */ | |
1083 | static int environ_size = 0; | |
1084 | /* allocated size of environ array, in bytes */ | |
1085 | static int environ_alloc = 0; | |
1086 | ||
1087 | /* | |
1088 | * Create environment block suitable for CreateProcess. Merges current | |
1089 | * process environment and the supplied environment changes. | |
1090 | */ | |
1091 | static wchar_t *make_environment_block(char **deltaenv) | |
1092 | { | |
1093 | wchar_t *wenvblk = NULL; | |
1094 | char **tmpenv; | |
1095 | int i = 0, size = environ_size, wenvsz = 0, wenvpos = 0; | |
1096 | ||
1097 | while (deltaenv && deltaenv[i]) | |
1098 | i++; | |
1099 | ||
1100 | /* copy the environment, leaving space for changes */ | |
1101 | ALLOC_ARRAY(tmpenv, size + i); | |
1102 | memcpy(tmpenv, environ, size * sizeof(char*)); | |
1103 | ||
1104 | /* merge supplied environment changes into the temporary environment */ | |
1105 | for (i = 0; deltaenv && deltaenv[i]; i++) | |
1106 | size = do_putenv(tmpenv, deltaenv[i], size, 0); | |
1107 | ||
1108 | /* create environment block from temporary environment */ | |
1109 | for (i = 0; tmpenv[i]; i++) { | |
1110 | size = 2 * strlen(tmpenv[i]) + 2; /* +2 for final \0 */ | |
1111 | ALLOC_GROW(wenvblk, (wenvpos + size) * sizeof(wchar_t), wenvsz); | |
1112 | wenvpos += xutftowcs(&wenvblk[wenvpos], tmpenv[i], size) + 1; | |
1113 | } | |
1114 | /* add final \0 terminator */ | |
1115 | wenvblk[wenvpos] = 0; | |
1116 | free(tmpenv); | |
1117 | return wenvblk; | |
1118 | } | |
1119 | ||
1120 | struct pinfo_t { | |
1121 | struct pinfo_t *next; | |
1122 | pid_t pid; | |
1123 | HANDLE proc; | |
1124 | }; | |
1125 | static struct pinfo_t *pinfo = NULL; | |
1126 | CRITICAL_SECTION pinfo_cs; | |
1127 | ||
1128 | static pid_t mingw_spawnve_fd(const char *cmd, const char **argv, char **deltaenv, | |
1129 | const char *dir, | |
1130 | int prepend_cmd, int fhin, int fhout, int fherr) | |
1131 | { | |
1132 | STARTUPINFOW si; | |
1133 | PROCESS_INFORMATION pi; | |
1134 | struct strbuf args; | |
1135 | wchar_t wcmd[MAX_PATH], wdir[MAX_PATH], *wargs, *wenvblk = NULL; | |
1136 | unsigned flags = CREATE_UNICODE_ENVIRONMENT; | |
1137 | BOOL ret; | |
1138 | ||
1139 | /* Determine whether or not we are associated to a console */ | |
1140 | HANDLE cons = CreateFile("CONOUT$", GENERIC_WRITE, | |
1141 | FILE_SHARE_WRITE, NULL, OPEN_EXISTING, | |
1142 | FILE_ATTRIBUTE_NORMAL, NULL); | |
1143 | if (cons == INVALID_HANDLE_VALUE) { | |
1144 | /* There is no console associated with this process. | |
1145 | * Since the child is a console process, Windows | |
1146 | * would normally create a console window. But | |
1147 | * since we'll be redirecting std streams, we do | |
1148 | * not need the console. | |
1149 | * It is necessary to use DETACHED_PROCESS | |
1150 | * instead of CREATE_NO_WINDOW to make ssh | |
1151 | * recognize that it has no console. | |
1152 | */ | |
1153 | flags |= DETACHED_PROCESS; | |
1154 | } else { | |
1155 | /* There is already a console. If we specified | |
1156 | * DETACHED_PROCESS here, too, Windows would | |
1157 | * disassociate the child from the console. | |
1158 | * The same is true for CREATE_NO_WINDOW. | |
1159 | * Go figure! | |
1160 | */ | |
1161 | CloseHandle(cons); | |
1162 | } | |
1163 | memset(&si, 0, sizeof(si)); | |
1164 | si.cb = sizeof(si); | |
1165 | si.dwFlags = STARTF_USESTDHANDLES; | |
1166 | si.hStdInput = winansi_get_osfhandle(fhin); | |
1167 | si.hStdOutput = winansi_get_osfhandle(fhout); | |
1168 | si.hStdError = winansi_get_osfhandle(fherr); | |
1169 | ||
1170 | if (xutftowcs_path(wcmd, cmd) < 0) | |
1171 | return -1; | |
1172 | if (dir && xutftowcs_path(wdir, dir) < 0) | |
1173 | return -1; | |
1174 | ||
1175 | /* concatenate argv, quoting args as we go */ | |
1176 | strbuf_init(&args, 0); | |
1177 | if (prepend_cmd) { | |
1178 | char *quoted = (char *)quote_arg(cmd); | |
1179 | strbuf_addstr(&args, quoted); | |
1180 | if (quoted != cmd) | |
1181 | free(quoted); | |
1182 | } | |
1183 | for (; *argv; argv++) { | |
1184 | char *quoted = (char *)quote_arg(*argv); | |
1185 | if (*args.buf) | |
1186 | strbuf_addch(&args, ' '); | |
1187 | strbuf_addstr(&args, quoted); | |
1188 | if (quoted != *argv) | |
1189 | free(quoted); | |
1190 | } | |
1191 | ||
1192 | ALLOC_ARRAY(wargs, st_add(st_mult(2, args.len), 1)); | |
1193 | xutftowcs(wargs, args.buf, 2 * args.len + 1); | |
1194 | strbuf_release(&args); | |
1195 | ||
1196 | wenvblk = make_environment_block(deltaenv); | |
1197 | ||
1198 | memset(&pi, 0, sizeof(pi)); | |
1199 | ret = CreateProcessW(wcmd, wargs, NULL, NULL, TRUE, flags, | |
1200 | wenvblk, dir ? wdir : NULL, &si, &pi); | |
1201 | ||
1202 | free(wenvblk); | |
1203 | free(wargs); | |
1204 | ||
1205 | if (!ret) { | |
1206 | errno = ENOENT; | |
1207 | return -1; | |
1208 | } | |
1209 | CloseHandle(pi.hThread); | |
1210 | ||
1211 | /* | |
1212 | * The process ID is the human-readable identifier of the process | |
1213 | * that we want to present in log and error messages. The handle | |
1214 | * is not useful for this purpose. But we cannot close it, either, | |
1215 | * because it is not possible to turn a process ID into a process | |
1216 | * handle after the process terminated. | |
1217 | * Keep the handle in a list for waitpid. | |
1218 | */ | |
1219 | EnterCriticalSection(&pinfo_cs); | |
1220 | { | |
1221 | struct pinfo_t *info = xmalloc(sizeof(struct pinfo_t)); | |
1222 | info->pid = pi.dwProcessId; | |
1223 | info->proc = pi.hProcess; | |
1224 | info->next = pinfo; | |
1225 | pinfo = info; | |
1226 | } | |
1227 | LeaveCriticalSection(&pinfo_cs); | |
1228 | ||
1229 | return (pid_t)pi.dwProcessId; | |
1230 | } | |
1231 | ||
1232 | static pid_t mingw_spawnv(const char *cmd, const char **argv, int prepend_cmd) | |
1233 | { | |
1234 | return mingw_spawnve_fd(cmd, argv, NULL, NULL, prepend_cmd, 0, 1, 2); | |
1235 | } | |
1236 | ||
1237 | pid_t mingw_spawnvpe(const char *cmd, const char **argv, char **deltaenv, | |
1238 | const char *dir, | |
1239 | int fhin, int fhout, int fherr) | |
1240 | { | |
1241 | pid_t pid; | |
1242 | char *prog = path_lookup(cmd, 0); | |
1243 | ||
1244 | if (!prog) { | |
1245 | errno = ENOENT; | |
1246 | pid = -1; | |
1247 | } | |
1248 | else { | |
1249 | const char *interpr = parse_interpreter(prog); | |
1250 | ||
1251 | if (interpr) { | |
1252 | const char *argv0 = argv[0]; | |
1253 | char *iprog = path_lookup(interpr, 1); | |
1254 | argv[0] = prog; | |
1255 | if (!iprog) { | |
1256 | errno = ENOENT; | |
1257 | pid = -1; | |
1258 | } | |
1259 | else { | |
1260 | pid = mingw_spawnve_fd(iprog, argv, deltaenv, dir, 1, | |
1261 | fhin, fhout, fherr); | |
1262 | free(iprog); | |
1263 | } | |
1264 | argv[0] = argv0; | |
1265 | } | |
1266 | else | |
1267 | pid = mingw_spawnve_fd(prog, argv, deltaenv, dir, 0, | |
1268 | fhin, fhout, fherr); | |
1269 | free(prog); | |
1270 | } | |
1271 | return pid; | |
1272 | } | |
1273 | ||
1274 | static int try_shell_exec(const char *cmd, char *const *argv) | |
1275 | { | |
1276 | const char *interpr = parse_interpreter(cmd); | |
1277 | char *prog; | |
1278 | int pid = 0; | |
1279 | ||
1280 | if (!interpr) | |
1281 | return 0; | |
1282 | prog = path_lookup(interpr, 1); | |
1283 | if (prog) { | |
1284 | int argc = 0; | |
1285 | const char **argv2; | |
1286 | while (argv[argc]) argc++; | |
1287 | ALLOC_ARRAY(argv2, argc + 1); | |
1288 | argv2[0] = (char *)cmd; /* full path to the script file */ | |
1289 | memcpy(&argv2[1], &argv[1], sizeof(*argv) * argc); | |
1290 | pid = mingw_spawnv(prog, argv2, 1); | |
1291 | if (pid >= 0) { | |
1292 | int status; | |
1293 | if (waitpid(pid, &status, 0) < 0) | |
1294 | status = 255; | |
1295 | exit(status); | |
1296 | } | |
1297 | pid = 1; /* indicate that we tried but failed */ | |
1298 | free(prog); | |
1299 | free(argv2); | |
1300 | } | |
1301 | return pid; | |
1302 | } | |
1303 | ||
1304 | int mingw_execv(const char *cmd, char *const *argv) | |
1305 | { | |
1306 | /* check if git_command is a shell script */ | |
1307 | if (!try_shell_exec(cmd, argv)) { | |
1308 | int pid, status; | |
1309 | ||
1310 | pid = mingw_spawnv(cmd, (const char **)argv, 0); | |
1311 | if (pid < 0) | |
1312 | return -1; | |
1313 | if (waitpid(pid, &status, 0) < 0) | |
1314 | status = 255; | |
1315 | exit(status); | |
1316 | } | |
1317 | return -1; | |
1318 | } | |
1319 | ||
1320 | int mingw_execvp(const char *cmd, char *const *argv) | |
1321 | { | |
1322 | char *prog = path_lookup(cmd, 0); | |
1323 | ||
1324 | if (prog) { | |
1325 | mingw_execv(prog, argv); | |
1326 | free(prog); | |
1327 | } else | |
1328 | errno = ENOENT; | |
1329 | ||
1330 | return -1; | |
1331 | } | |
1332 | ||
1333 | int mingw_kill(pid_t pid, int sig) | |
1334 | { | |
1335 | if (pid > 0 && sig == SIGTERM) { | |
1336 | HANDLE h = OpenProcess(PROCESS_TERMINATE, FALSE, pid); | |
1337 | ||
1338 | if (TerminateProcess(h, -1)) { | |
1339 | CloseHandle(h); | |
1340 | return 0; | |
1341 | } | |
1342 | ||
1343 | errno = err_win_to_posix(GetLastError()); | |
1344 | CloseHandle(h); | |
1345 | return -1; | |
1346 | } else if (pid > 0 && sig == 0) { | |
1347 | HANDLE h = OpenProcess(PROCESS_QUERY_INFORMATION, FALSE, pid); | |
1348 | if (h) { | |
1349 | CloseHandle(h); | |
1350 | return 0; | |
1351 | } | |
1352 | } | |
1353 | ||
1354 | errno = EINVAL; | |
1355 | return -1; | |
1356 | } | |
1357 | ||
1358 | /* | |
1359 | * Compare environment entries by key (i.e. stopping at '=' or '\0'). | |
1360 | */ | |
1361 | static int compareenv(const void *v1, const void *v2) | |
1362 | { | |
1363 | const char *e1 = *(const char**)v1; | |
1364 | const char *e2 = *(const char**)v2; | |
1365 | ||
1366 | for (;;) { | |
1367 | int c1 = *e1++; | |
1368 | int c2 = *e2++; | |
1369 | c1 = (c1 == '=') ? 0 : tolower(c1); | |
1370 | c2 = (c2 == '=') ? 0 : tolower(c2); | |
1371 | if (c1 > c2) | |
1372 | return 1; | |
1373 | if (c1 < c2) | |
1374 | return -1; | |
1375 | if (c1 == 0) | |
1376 | return 0; | |
1377 | } | |
1378 | } | |
1379 | ||
1380 | static int bsearchenv(char **env, const char *name, size_t size) | |
1381 | { | |
1382 | unsigned low = 0, high = size; | |
1383 | while (low < high) { | |
1384 | unsigned mid = low + ((high - low) >> 1); | |
1385 | int cmp = compareenv(&env[mid], &name); | |
1386 | if (cmp < 0) | |
1387 | low = mid + 1; | |
1388 | else if (cmp > 0) | |
1389 | high = mid; | |
1390 | else | |
1391 | return mid; | |
1392 | } | |
1393 | return ~low; /* not found, return 1's complement of insert position */ | |
1394 | } | |
1395 | ||
1396 | /* | |
1397 | * If name contains '=', then sets the variable, otherwise it unsets it | |
1398 | * Size includes the terminating NULL. Env must have room for size + 1 entries | |
1399 | * (in case of insert). Returns the new size. Optionally frees removed entries. | |
1400 | */ | |
1401 | static int do_putenv(char **env, const char *name, int size, int free_old) | |
1402 | { | |
1403 | int i = bsearchenv(env, name, size - 1); | |
1404 | ||
1405 | /* optionally free removed / replaced entry */ | |
1406 | if (i >= 0 && free_old) | |
1407 | free(env[i]); | |
1408 | ||
1409 | if (strchr(name, '=')) { | |
1410 | /* if new value ('key=value') is specified, insert or replace entry */ | |
1411 | if (i < 0) { | |
1412 | i = ~i; | |
1413 | memmove(&env[i + 1], &env[i], (size - i) * sizeof(char*)); | |
1414 | size++; | |
1415 | } | |
1416 | env[i] = (char*) name; | |
1417 | } else if (i >= 0) { | |
1418 | /* otherwise ('key') remove existing entry */ | |
1419 | size--; | |
1420 | memmove(&env[i], &env[i + 1], (size - i) * sizeof(char*)); | |
1421 | } | |
1422 | return size; | |
1423 | } | |
1424 | ||
1425 | char *mingw_getenv(const char *name) | |
1426 | { | |
1427 | char *value; | |
1428 | int pos = bsearchenv(environ, name, environ_size - 1); | |
1429 | if (pos < 0) | |
1430 | return NULL; | |
1431 | value = strchr(environ[pos], '='); | |
1432 | return value ? &value[1] : NULL; | |
1433 | } | |
1434 | ||
1435 | int mingw_putenv(const char *namevalue) | |
1436 | { | |
1437 | ALLOC_GROW(environ, (environ_size + 1) * sizeof(char*), environ_alloc); | |
1438 | environ_size = do_putenv(environ, namevalue, environ_size, 1); | |
1439 | return 0; | |
1440 | } | |
1441 | ||
1442 | /* | |
1443 | * Note, this isn't a complete replacement for getaddrinfo. It assumes | |
1444 | * that service contains a numerical port, or that it is null. It | |
1445 | * does a simple search using gethostbyname, and returns one IPv4 host | |
1446 | * if one was found. | |
1447 | */ | |
1448 | static int WSAAPI getaddrinfo_stub(const char *node, const char *service, | |
1449 | const struct addrinfo *hints, | |
1450 | struct addrinfo **res) | |
1451 | { | |
1452 | struct hostent *h = NULL; | |
1453 | struct addrinfo *ai; | |
1454 | struct sockaddr_in *sin; | |
1455 | ||
1456 | if (node) { | |
1457 | h = gethostbyname(node); | |
1458 | if (!h) | |
1459 | return WSAGetLastError(); | |
1460 | } | |
1461 | ||
1462 | ai = xmalloc(sizeof(struct addrinfo)); | |
1463 | *res = ai; | |
1464 | ai->ai_flags = 0; | |
1465 | ai->ai_family = AF_INET; | |
1466 | ai->ai_socktype = hints ? hints->ai_socktype : 0; | |
1467 | switch (ai->ai_socktype) { | |
1468 | case SOCK_STREAM: | |
1469 | ai->ai_protocol = IPPROTO_TCP; | |
1470 | break; | |
1471 | case SOCK_DGRAM: | |
1472 | ai->ai_protocol = IPPROTO_UDP; | |
1473 | break; | |
1474 | default: | |
1475 | ai->ai_protocol = 0; | |
1476 | break; | |
1477 | } | |
1478 | ai->ai_addrlen = sizeof(struct sockaddr_in); | |
1479 | if (hints && (hints->ai_flags & AI_CANONNAME)) | |
1480 | ai->ai_canonname = h ? xstrdup(h->h_name) : NULL; | |
1481 | else | |
1482 | ai->ai_canonname = NULL; | |
1483 | ||
1484 | sin = xcalloc(1, ai->ai_addrlen); | |
1485 | sin->sin_family = AF_INET; | |
1486 | /* Note: getaddrinfo is supposed to allow service to be a string, | |
1487 | * which should be looked up using getservbyname. This is | |
1488 | * currently not implemented */ | |
1489 | if (service) | |
1490 | sin->sin_port = htons(atoi(service)); | |
1491 | if (h) | |
1492 | sin->sin_addr = *(struct in_addr *)h->h_addr; | |
1493 | else if (hints && (hints->ai_flags & AI_PASSIVE)) | |
1494 | sin->sin_addr.s_addr = INADDR_ANY; | |
1495 | else | |
1496 | sin->sin_addr.s_addr = INADDR_LOOPBACK; | |
1497 | ai->ai_addr = (struct sockaddr *)sin; | |
1498 | ai->ai_next = NULL; | |
1499 | return 0; | |
1500 | } | |
1501 | ||
1502 | static void WSAAPI freeaddrinfo_stub(struct addrinfo *res) | |
1503 | { | |
1504 | free(res->ai_canonname); | |
1505 | free(res->ai_addr); | |
1506 | free(res); | |
1507 | } | |
1508 | ||
1509 | static int WSAAPI getnameinfo_stub(const struct sockaddr *sa, socklen_t salen, | |
1510 | char *host, DWORD hostlen, | |
1511 | char *serv, DWORD servlen, int flags) | |
1512 | { | |
1513 | const struct sockaddr_in *sin = (const struct sockaddr_in *)sa; | |
1514 | if (sa->sa_family != AF_INET) | |
1515 | return EAI_FAMILY; | |
1516 | if (!host && !serv) | |
1517 | return EAI_NONAME; | |
1518 | ||
1519 | if (host && hostlen > 0) { | |
1520 | struct hostent *ent = NULL; | |
1521 | if (!(flags & NI_NUMERICHOST)) | |
1522 | ent = gethostbyaddr((const char *)&sin->sin_addr, | |
1523 | sizeof(sin->sin_addr), AF_INET); | |
1524 | ||
1525 | if (ent) | |
1526 | snprintf(host, hostlen, "%s", ent->h_name); | |
1527 | else if (flags & NI_NAMEREQD) | |
1528 | return EAI_NONAME; | |
1529 | else | |
1530 | snprintf(host, hostlen, "%s", inet_ntoa(sin->sin_addr)); | |
1531 | } | |
1532 | ||
1533 | if (serv && servlen > 0) { | |
1534 | struct servent *ent = NULL; | |
1535 | if (!(flags & NI_NUMERICSERV)) | |
1536 | ent = getservbyport(sin->sin_port, | |
1537 | flags & NI_DGRAM ? "udp" : "tcp"); | |
1538 | ||
1539 | if (ent) | |
1540 | snprintf(serv, servlen, "%s", ent->s_name); | |
1541 | else | |
1542 | snprintf(serv, servlen, "%d", ntohs(sin->sin_port)); | |
1543 | } | |
1544 | ||
1545 | return 0; | |
1546 | } | |
1547 | ||
1548 | static HMODULE ipv6_dll = NULL; | |
1549 | static void (WSAAPI *ipv6_freeaddrinfo)(struct addrinfo *res); | |
1550 | static int (WSAAPI *ipv6_getaddrinfo)(const char *node, const char *service, | |
1551 | const struct addrinfo *hints, | |
1552 | struct addrinfo **res); | |
1553 | static int (WSAAPI *ipv6_getnameinfo)(const struct sockaddr *sa, socklen_t salen, | |
1554 | char *host, DWORD hostlen, | |
1555 | char *serv, DWORD servlen, int flags); | |
1556 | /* | |
1557 | * gai_strerror is an inline function in the ws2tcpip.h header, so we | |
1558 | * don't need to try to load that one dynamically. | |
1559 | */ | |
1560 | ||
1561 | static void socket_cleanup(void) | |
1562 | { | |
1563 | WSACleanup(); | |
1564 | if (ipv6_dll) | |
1565 | FreeLibrary(ipv6_dll); | |
1566 | ipv6_dll = NULL; | |
1567 | ipv6_freeaddrinfo = freeaddrinfo_stub; | |
1568 | ipv6_getaddrinfo = getaddrinfo_stub; | |
1569 | ipv6_getnameinfo = getnameinfo_stub; | |
1570 | } | |
1571 | ||
1572 | static void ensure_socket_initialization(void) | |
1573 | { | |
1574 | WSADATA wsa; | |
1575 | static int initialized = 0; | |
1576 | const char *libraries[] = { "ws2_32.dll", "wship6.dll", NULL }; | |
1577 | const char **name; | |
1578 | ||
1579 | if (initialized) | |
1580 | return; | |
1581 | ||
1582 | if (WSAStartup(MAKEWORD(2,2), &wsa)) | |
1583 | die("unable to initialize winsock subsystem, error %d", | |
1584 | WSAGetLastError()); | |
1585 | ||
1586 | for (name = libraries; *name; name++) { | |
1587 | ipv6_dll = LoadLibrary(*name); | |
1588 | if (!ipv6_dll) | |
1589 | continue; | |
1590 | ||
1591 | ipv6_freeaddrinfo = (void (WSAAPI *)(struct addrinfo *)) | |
1592 | GetProcAddress(ipv6_dll, "freeaddrinfo"); | |
1593 | ipv6_getaddrinfo = (int (WSAAPI *)(const char *, const char *, | |
1594 | const struct addrinfo *, | |
1595 | struct addrinfo **)) | |
1596 | GetProcAddress(ipv6_dll, "getaddrinfo"); | |
1597 | ipv6_getnameinfo = (int (WSAAPI *)(const struct sockaddr *, | |
1598 | socklen_t, char *, DWORD, | |
1599 | char *, DWORD, int)) | |
1600 | GetProcAddress(ipv6_dll, "getnameinfo"); | |
1601 | if (!ipv6_freeaddrinfo || !ipv6_getaddrinfo || !ipv6_getnameinfo) { | |
1602 | FreeLibrary(ipv6_dll); | |
1603 | ipv6_dll = NULL; | |
1604 | } else | |
1605 | break; | |
1606 | } | |
1607 | if (!ipv6_freeaddrinfo || !ipv6_getaddrinfo || !ipv6_getnameinfo) { | |
1608 | ipv6_freeaddrinfo = freeaddrinfo_stub; | |
1609 | ipv6_getaddrinfo = getaddrinfo_stub; | |
1610 | ipv6_getnameinfo = getnameinfo_stub; | |
1611 | } | |
1612 | ||
1613 | atexit(socket_cleanup); | |
1614 | initialized = 1; | |
1615 | } | |
1616 | ||
1617 | #undef gethostname | |
1618 | int mingw_gethostname(char *name, int namelen) | |
1619 | { | |
1620 | ensure_socket_initialization(); | |
1621 | return gethostname(name, namelen); | |
1622 | } | |
1623 | ||
1624 | #undef gethostbyname | |
1625 | struct hostent *mingw_gethostbyname(const char *host) | |
1626 | { | |
1627 | ensure_socket_initialization(); | |
1628 | return gethostbyname(host); | |
1629 | } | |
1630 | ||
1631 | void mingw_freeaddrinfo(struct addrinfo *res) | |
1632 | { | |
1633 | ipv6_freeaddrinfo(res); | |
1634 | } | |
1635 | ||
1636 | int mingw_getaddrinfo(const char *node, const char *service, | |
1637 | const struct addrinfo *hints, struct addrinfo **res) | |
1638 | { | |
1639 | ensure_socket_initialization(); | |
1640 | return ipv6_getaddrinfo(node, service, hints, res); | |
1641 | } | |
1642 | ||
1643 | int mingw_getnameinfo(const struct sockaddr *sa, socklen_t salen, | |
1644 | char *host, DWORD hostlen, char *serv, DWORD servlen, | |
1645 | int flags) | |
1646 | { | |
1647 | ensure_socket_initialization(); | |
1648 | return ipv6_getnameinfo(sa, salen, host, hostlen, serv, servlen, flags); | |
1649 | } | |
1650 | ||
1651 | int mingw_socket(int domain, int type, int protocol) | |
1652 | { | |
1653 | int sockfd; | |
1654 | SOCKET s; | |
1655 | ||
1656 | ensure_socket_initialization(); | |
1657 | s = WSASocket(domain, type, protocol, NULL, 0, 0); | |
1658 | if (s == INVALID_SOCKET) { | |
1659 | /* | |
1660 | * WSAGetLastError() values are regular BSD error codes | |
1661 | * biased by WSABASEERR. | |
1662 | * However, strerror() does not know about networking | |
1663 | * specific errors, which are values beginning at 38 or so. | |
1664 | * Therefore, we choose to leave the biased error code | |
1665 | * in errno so that _if_ someone looks up the code somewhere, | |
1666 | * then it is at least the number that are usually listed. | |
1667 | */ | |
1668 | errno = WSAGetLastError(); | |
1669 | return -1; | |
1670 | } | |
1671 | /* convert into a file descriptor */ | |
1672 | if ((sockfd = _open_osfhandle(s, O_RDWR|O_BINARY)) < 0) { | |
1673 | closesocket(s); | |
1674 | return error("unable to make a socket file descriptor: %s", | |
1675 | strerror(errno)); | |
1676 | } | |
1677 | return sockfd; | |
1678 | } | |
1679 | ||
1680 | #undef connect | |
1681 | int mingw_connect(int sockfd, struct sockaddr *sa, size_t sz) | |
1682 | { | |
1683 | SOCKET s = (SOCKET)_get_osfhandle(sockfd); | |
1684 | return connect(s, sa, sz); | |
1685 | } | |
1686 | ||
1687 | #undef bind | |
1688 | int mingw_bind(int sockfd, struct sockaddr *sa, size_t sz) | |
1689 | { | |
1690 | SOCKET s = (SOCKET)_get_osfhandle(sockfd); | |
1691 | return bind(s, sa, sz); | |
1692 | } | |
1693 | ||
1694 | #undef setsockopt | |
1695 | int mingw_setsockopt(int sockfd, int lvl, int optname, void *optval, int optlen) | |
1696 | { | |
1697 | SOCKET s = (SOCKET)_get_osfhandle(sockfd); | |
1698 | return setsockopt(s, lvl, optname, (const char*)optval, optlen); | |
1699 | } | |
1700 | ||
1701 | #undef shutdown | |
1702 | int mingw_shutdown(int sockfd, int how) | |
1703 | { | |
1704 | SOCKET s = (SOCKET)_get_osfhandle(sockfd); | |
1705 | return shutdown(s, how); | |
1706 | } | |
1707 | ||
1708 | #undef listen | |
1709 | int mingw_listen(int sockfd, int backlog) | |
1710 | { | |
1711 | SOCKET s = (SOCKET)_get_osfhandle(sockfd); | |
1712 | return listen(s, backlog); | |
1713 | } | |
1714 | ||
1715 | #undef accept | |
1716 | int mingw_accept(int sockfd1, struct sockaddr *sa, socklen_t *sz) | |
1717 | { | |
1718 | int sockfd2; | |
1719 | ||
1720 | SOCKET s1 = (SOCKET)_get_osfhandle(sockfd1); | |
1721 | SOCKET s2 = accept(s1, sa, sz); | |
1722 | ||
1723 | /* convert into a file descriptor */ | |
1724 | if ((sockfd2 = _open_osfhandle(s2, O_RDWR|O_BINARY)) < 0) { | |
1725 | int err = errno; | |
1726 | closesocket(s2); | |
1727 | return error("unable to make a socket file descriptor: %s", | |
1728 | strerror(err)); | |
1729 | } | |
1730 | return sockfd2; | |
1731 | } | |
1732 | ||
1733 | #undef rename | |
1734 | int mingw_rename(const char *pold, const char *pnew) | |
1735 | { | |
1736 | DWORD attrs, gle; | |
1737 | int tries = 0; | |
1738 | wchar_t wpold[MAX_PATH], wpnew[MAX_PATH]; | |
1739 | if (xutftowcs_path(wpold, pold) < 0 || xutftowcs_path(wpnew, pnew) < 0) | |
1740 | return -1; | |
1741 | ||
1742 | /* | |
1743 | * Try native rename() first to get errno right. | |
1744 | * It is based on MoveFile(), which cannot overwrite existing files. | |
1745 | */ | |
1746 | if (!_wrename(wpold, wpnew)) | |
1747 | return 0; | |
1748 | if (errno != EEXIST) | |
1749 | return -1; | |
1750 | repeat: | |
1751 | if (MoveFileExW(wpold, wpnew, MOVEFILE_REPLACE_EXISTING)) | |
1752 | return 0; | |
1753 | /* TODO: translate more errors */ | |
1754 | gle = GetLastError(); | |
1755 | if (gle == ERROR_ACCESS_DENIED && | |
1756 | (attrs = GetFileAttributesW(wpnew)) != INVALID_FILE_ATTRIBUTES) { | |
1757 | if (attrs & FILE_ATTRIBUTE_DIRECTORY) { | |
1758 | DWORD attrsold = GetFileAttributesW(wpold); | |
1759 | if (attrsold == INVALID_FILE_ATTRIBUTES || | |
1760 | !(attrsold & FILE_ATTRIBUTE_DIRECTORY)) | |
1761 | errno = EISDIR; | |
1762 | else if (!_wrmdir(wpnew)) | |
1763 | goto repeat; | |
1764 | return -1; | |
1765 | } | |
1766 | if ((attrs & FILE_ATTRIBUTE_READONLY) && | |
1767 | SetFileAttributesW(wpnew, attrs & ~FILE_ATTRIBUTE_READONLY)) { | |
1768 | if (MoveFileExW(wpold, wpnew, MOVEFILE_REPLACE_EXISTING)) | |
1769 | return 0; | |
1770 | gle = GetLastError(); | |
1771 | /* revert file attributes on failure */ | |
1772 | SetFileAttributesW(wpnew, attrs); | |
1773 | } | |
1774 | } | |
1775 | if (tries < ARRAY_SIZE(delay) && gle == ERROR_ACCESS_DENIED) { | |
1776 | /* | |
1777 | * We assume that some other process had the source or | |
1778 | * destination file open at the wrong moment and retry. | |
1779 | * In order to give the other process a higher chance to | |
1780 | * complete its operation, we give up our time slice now. | |
1781 | * If we have to retry again, we do sleep a bit. | |
1782 | */ | |
1783 | Sleep(delay[tries]); | |
1784 | tries++; | |
1785 | goto repeat; | |
1786 | } | |
1787 | if (gle == ERROR_ACCESS_DENIED && | |
1788 | ask_yes_no_if_possible("Rename from '%s' to '%s' failed. " | |
1789 | "Should I try again?", pold, pnew)) | |
1790 | goto repeat; | |
1791 | ||
1792 | errno = EACCES; | |
1793 | return -1; | |
1794 | } | |
1795 | ||
1796 | /* | |
1797 | * Note that this doesn't return the actual pagesize, but | |
1798 | * the allocation granularity. If future Windows specific git code | |
1799 | * needs the real getpagesize function, we need to find another solution. | |
1800 | */ | |
1801 | int mingw_getpagesize(void) | |
1802 | { | |
1803 | SYSTEM_INFO si; | |
1804 | GetSystemInfo(&si); | |
1805 | return si.dwAllocationGranularity; | |
1806 | } | |
1807 | ||
1808 | struct passwd *getpwuid(int uid) | |
1809 | { | |
1810 | static char user_name[100]; | |
1811 | static struct passwd p; | |
1812 | ||
1813 | DWORD len = sizeof(user_name); | |
1814 | if (!GetUserName(user_name, &len)) | |
1815 | return NULL; | |
1816 | p.pw_name = user_name; | |
1817 | p.pw_gecos = "unknown"; | |
1818 | p.pw_dir = NULL; | |
1819 | return &p; | |
1820 | } | |
1821 | ||
1822 | static HANDLE timer_event; | |
1823 | static HANDLE timer_thread; | |
1824 | static int timer_interval; | |
1825 | static int one_shot; | |
1826 | static sig_handler_t timer_fn = SIG_DFL, sigint_fn = SIG_DFL; | |
1827 | ||
1828 | /* The timer works like this: | |
1829 | * The thread, ticktack(), is a trivial routine that most of the time | |
1830 | * only waits to receive the signal to terminate. The main thread tells | |
1831 | * the thread to terminate by setting the timer_event to the signalled | |
1832 | * state. | |
1833 | * But ticktack() interrupts the wait state after the timer's interval | |
1834 | * length to call the signal handler. | |
1835 | */ | |
1836 | ||
1837 | static unsigned __stdcall ticktack(void *dummy) | |
1838 | { | |
1839 | while (WaitForSingleObject(timer_event, timer_interval) == WAIT_TIMEOUT) { | |
1840 | mingw_raise(SIGALRM); | |
1841 | if (one_shot) | |
1842 | break; | |
1843 | } | |
1844 | return 0; | |
1845 | } | |
1846 | ||
1847 | static int start_timer_thread(void) | |
1848 | { | |
1849 | timer_event = CreateEvent(NULL, FALSE, FALSE, NULL); | |
1850 | if (timer_event) { | |
1851 | timer_thread = (HANDLE) _beginthreadex(NULL, 0, ticktack, NULL, 0, NULL); | |
1852 | if (!timer_thread ) | |
1853 | return errno = ENOMEM, | |
1854 | error("cannot start timer thread"); | |
1855 | } else | |
1856 | return errno = ENOMEM, | |
1857 | error("cannot allocate resources for timer"); | |
1858 | return 0; | |
1859 | } | |
1860 | ||
1861 | static void stop_timer_thread(void) | |
1862 | { | |
1863 | if (timer_event) | |
1864 | SetEvent(timer_event); /* tell thread to terminate */ | |
1865 | if (timer_thread) { | |
1866 | int rc = WaitForSingleObject(timer_thread, 1000); | |
1867 | if (rc == WAIT_TIMEOUT) | |
1868 | error("timer thread did not terminate timely"); | |
1869 | else if (rc != WAIT_OBJECT_0) | |
1870 | error("waiting for timer thread failed: %lu", | |
1871 | GetLastError()); | |
1872 | CloseHandle(timer_thread); | |
1873 | } | |
1874 | if (timer_event) | |
1875 | CloseHandle(timer_event); | |
1876 | timer_event = NULL; | |
1877 | timer_thread = NULL; | |
1878 | } | |
1879 | ||
1880 | static inline int is_timeval_eq(const struct timeval *i1, const struct timeval *i2) | |
1881 | { | |
1882 | return i1->tv_sec == i2->tv_sec && i1->tv_usec == i2->tv_usec; | |
1883 | } | |
1884 | ||
1885 | int setitimer(int type, struct itimerval *in, struct itimerval *out) | |
1886 | { | |
1887 | static const struct timeval zero; | |
1888 | static int atexit_done; | |
1889 | ||
1890 | if (out != NULL) | |
1891 | return errno = EINVAL, | |
1892 | error("setitimer param 3 != NULL not implemented"); | |
1893 | if (!is_timeval_eq(&in->it_interval, &zero) && | |
1894 | !is_timeval_eq(&in->it_interval, &in->it_value)) | |
1895 | return errno = EINVAL, | |
1896 | error("setitimer: it_interval must be zero or eq it_value"); | |
1897 | ||
1898 | if (timer_thread) | |
1899 | stop_timer_thread(); | |
1900 | ||
1901 | if (is_timeval_eq(&in->it_value, &zero) && | |
1902 | is_timeval_eq(&in->it_interval, &zero)) | |
1903 | return 0; | |
1904 | ||
1905 | timer_interval = in->it_value.tv_sec * 1000 + in->it_value.tv_usec / 1000; | |
1906 | one_shot = is_timeval_eq(&in->it_interval, &zero); | |
1907 | if (!atexit_done) { | |
1908 | atexit(stop_timer_thread); | |
1909 | atexit_done = 1; | |
1910 | } | |
1911 | return start_timer_thread(); | |
1912 | } | |
1913 | ||
1914 | int sigaction(int sig, struct sigaction *in, struct sigaction *out) | |
1915 | { | |
1916 | if (sig != SIGALRM) | |
1917 | return errno = EINVAL, | |
1918 | error("sigaction only implemented for SIGALRM"); | |
1919 | if (out != NULL) | |
1920 | return errno = EINVAL, | |
1921 | error("sigaction: param 3 != NULL not implemented"); | |
1922 | ||
1923 | timer_fn = in->sa_handler; | |
1924 | return 0; | |
1925 | } | |
1926 | ||
1927 | #undef signal | |
1928 | sig_handler_t mingw_signal(int sig, sig_handler_t handler) | |
1929 | { | |
1930 | sig_handler_t old; | |
1931 | ||
1932 | switch (sig) { | |
1933 | case SIGALRM: | |
1934 | old = timer_fn; | |
1935 | timer_fn = handler; | |
1936 | break; | |
1937 | ||
1938 | case SIGINT: | |
1939 | old = sigint_fn; | |
1940 | sigint_fn = handler; | |
1941 | break; | |
1942 | ||
1943 | default: | |
1944 | return signal(sig, handler); | |
1945 | } | |
1946 | ||
1947 | return old; | |
1948 | } | |
1949 | ||
1950 | #undef raise | |
1951 | int mingw_raise(int sig) | |
1952 | { | |
1953 | switch (sig) { | |
1954 | case SIGALRM: | |
1955 | if (timer_fn == SIG_DFL) { | |
1956 | if (isatty(STDERR_FILENO)) | |
1957 | fputs("Alarm clock\n", stderr); | |
1958 | exit(128 + SIGALRM); | |
1959 | } else if (timer_fn != SIG_IGN) | |
1960 | timer_fn(SIGALRM); | |
1961 | return 0; | |
1962 | ||
1963 | case SIGINT: | |
1964 | if (sigint_fn == SIG_DFL) | |
1965 | exit(128 + SIGINT); | |
1966 | else if (sigint_fn != SIG_IGN) | |
1967 | sigint_fn(SIGINT); | |
1968 | return 0; | |
1969 | ||
1970 | default: | |
1971 | return raise(sig); | |
1972 | } | |
1973 | } | |
1974 | ||
1975 | int link(const char *oldpath, const char *newpath) | |
1976 | { | |
1977 | typedef BOOL (WINAPI *T)(LPCWSTR, LPCWSTR, LPSECURITY_ATTRIBUTES); | |
1978 | static T create_hard_link = NULL; | |
1979 | wchar_t woldpath[MAX_PATH], wnewpath[MAX_PATH]; | |
1980 | if (xutftowcs_path(woldpath, oldpath) < 0 || | |
1981 | xutftowcs_path(wnewpath, newpath) < 0) | |
1982 | return -1; | |
1983 | ||
1984 | if (!create_hard_link) { | |
1985 | create_hard_link = (T) GetProcAddress( | |
1986 | GetModuleHandle("kernel32.dll"), "CreateHardLinkW"); | |
1987 | if (!create_hard_link) | |
1988 | create_hard_link = (T)-1; | |
1989 | } | |
1990 | if (create_hard_link == (T)-1) { | |
1991 | errno = ENOSYS; | |
1992 | return -1; | |
1993 | } | |
1994 | if (!create_hard_link(wnewpath, woldpath, NULL)) { | |
1995 | errno = err_win_to_posix(GetLastError()); | |
1996 | return -1; | |
1997 | } | |
1998 | return 0; | |
1999 | } | |
2000 | ||
2001 | pid_t waitpid(pid_t pid, int *status, int options) | |
2002 | { | |
2003 | HANDLE h = OpenProcess(SYNCHRONIZE | PROCESS_QUERY_INFORMATION, | |
2004 | FALSE, pid); | |
2005 | if (!h) { | |
2006 | errno = ECHILD; | |
2007 | return -1; | |
2008 | } | |
2009 | ||
2010 | if (pid > 0 && options & WNOHANG) { | |
2011 | if (WAIT_OBJECT_0 != WaitForSingleObject(h, 0)) { | |
2012 | CloseHandle(h); | |
2013 | return 0; | |
2014 | } | |
2015 | options &= ~WNOHANG; | |
2016 | } | |
2017 | ||
2018 | if (options == 0) { | |
2019 | struct pinfo_t **ppinfo; | |
2020 | if (WaitForSingleObject(h, INFINITE) != WAIT_OBJECT_0) { | |
2021 | CloseHandle(h); | |
2022 | return 0; | |
2023 | } | |
2024 | ||
2025 | if (status) | |
2026 | GetExitCodeProcess(h, (LPDWORD)status); | |
2027 | ||
2028 | EnterCriticalSection(&pinfo_cs); | |
2029 | ||
2030 | ppinfo = &pinfo; | |
2031 | while (*ppinfo) { | |
2032 | struct pinfo_t *info = *ppinfo; | |
2033 | if (info->pid == pid) { | |
2034 | CloseHandle(info->proc); | |
2035 | *ppinfo = info->next; | |
2036 | free(info); | |
2037 | break; | |
2038 | } | |
2039 | ppinfo = &info->next; | |
2040 | } | |
2041 | ||
2042 | LeaveCriticalSection(&pinfo_cs); | |
2043 | ||
2044 | CloseHandle(h); | |
2045 | return pid; | |
2046 | } | |
2047 | CloseHandle(h); | |
2048 | ||
2049 | errno = EINVAL; | |
2050 | return -1; | |
2051 | } | |
2052 | ||
2053 | int mingw_skip_dos_drive_prefix(char **path) | |
2054 | { | |
2055 | int ret = has_dos_drive_prefix(*path); | |
2056 | *path += ret; | |
2057 | return ret; | |
2058 | } | |
2059 | ||
2060 | int mingw_offset_1st_component(const char *path) | |
2061 | { | |
2062 | char *pos = (char *)path; | |
2063 | ||
2064 | /* unc paths */ | |
2065 | if (!skip_dos_drive_prefix(&pos) && | |
2066 | is_dir_sep(pos[0]) && is_dir_sep(pos[1])) { | |
2067 | /* skip server name */ | |
2068 | pos = strpbrk(pos + 2, "\\/"); | |
2069 | if (!pos) | |
2070 | return 0; /* Error: malformed unc path */ | |
2071 | ||
2072 | do { | |
2073 | pos++; | |
2074 | } while (*pos && !is_dir_sep(*pos)); | |
2075 | } | |
2076 | ||
2077 | return pos + is_dir_sep(*pos) - path; | |
2078 | } | |
2079 | ||
2080 | int xutftowcsn(wchar_t *wcs, const char *utfs, size_t wcslen, int utflen) | |
2081 | { | |
2082 | int upos = 0, wpos = 0; | |
2083 | const unsigned char *utf = (const unsigned char*) utfs; | |
2084 | if (!utf || !wcs || wcslen < 1) { | |
2085 | errno = EINVAL; | |
2086 | return -1; | |
2087 | } | |
2088 | /* reserve space for \0 */ | |
2089 | wcslen--; | |
2090 | if (utflen < 0) | |
2091 | utflen = INT_MAX; | |
2092 | ||
2093 | while (upos < utflen) { | |
2094 | int c = utf[upos++] & 0xff; | |
2095 | if (utflen == INT_MAX && c == 0) | |
2096 | break; | |
2097 | ||
2098 | if (wpos >= wcslen) { | |
2099 | wcs[wpos] = 0; | |
2100 | errno = ERANGE; | |
2101 | return -1; | |
2102 | } | |
2103 | ||
2104 | if (c < 0x80) { | |
2105 | /* ASCII */ | |
2106 | wcs[wpos++] = c; | |
2107 | } else if (c >= 0xc2 && c < 0xe0 && upos < utflen && | |
2108 | (utf[upos] & 0xc0) == 0x80) { | |
2109 | /* 2-byte utf-8 */ | |
2110 | c = ((c & 0x1f) << 6); | |
2111 | c |= (utf[upos++] & 0x3f); | |
2112 | wcs[wpos++] = c; | |
2113 | } else if (c >= 0xe0 && c < 0xf0 && upos + 1 < utflen && | |
2114 | !(c == 0xe0 && utf[upos] < 0xa0) && /* over-long encoding */ | |
2115 | (utf[upos] & 0xc0) == 0x80 && | |
2116 | (utf[upos + 1] & 0xc0) == 0x80) { | |
2117 | /* 3-byte utf-8 */ | |
2118 | c = ((c & 0x0f) << 12); | |
2119 | c |= ((utf[upos++] & 0x3f) << 6); | |
2120 | c |= (utf[upos++] & 0x3f); | |
2121 | wcs[wpos++] = c; | |
2122 | } else if (c >= 0xf0 && c < 0xf5 && upos + 2 < utflen && | |
2123 | wpos + 1 < wcslen && | |
2124 | !(c == 0xf0 && utf[upos] < 0x90) && /* over-long encoding */ | |
2125 | !(c == 0xf4 && utf[upos] >= 0x90) && /* > \u10ffff */ | |
2126 | (utf[upos] & 0xc0) == 0x80 && | |
2127 | (utf[upos + 1] & 0xc0) == 0x80 && | |
2128 | (utf[upos + 2] & 0xc0) == 0x80) { | |
2129 | /* 4-byte utf-8: convert to \ud8xx \udcxx surrogate pair */ | |
2130 | c = ((c & 0x07) << 18); | |
2131 | c |= ((utf[upos++] & 0x3f) << 12); | |
2132 | c |= ((utf[upos++] & 0x3f) << 6); | |
2133 | c |= (utf[upos++] & 0x3f); | |
2134 | c -= 0x10000; | |
2135 | wcs[wpos++] = 0xd800 | (c >> 10); | |
2136 | wcs[wpos++] = 0xdc00 | (c & 0x3ff); | |
2137 | } else if (c >= 0xa0) { | |
2138 | /* invalid utf-8 byte, printable unicode char: convert 1:1 */ | |
2139 | wcs[wpos++] = c; | |
2140 | } else { | |
2141 | /* invalid utf-8 byte, non-printable unicode: convert to hex */ | |
2142 | static const char *hex = "0123456789abcdef"; | |
2143 | wcs[wpos++] = hex[c >> 4]; | |
2144 | if (wpos < wcslen) | |
2145 | wcs[wpos++] = hex[c & 0x0f]; | |
2146 | } | |
2147 | } | |
2148 | wcs[wpos] = 0; | |
2149 | return wpos; | |
2150 | } | |
2151 | ||
2152 | int xwcstoutf(char *utf, const wchar_t *wcs, size_t utflen) | |
2153 | { | |
2154 | if (!wcs || !utf || utflen < 1) { | |
2155 | errno = EINVAL; | |
2156 | return -1; | |
2157 | } | |
2158 | utflen = WideCharToMultiByte(CP_UTF8, 0, wcs, -1, utf, utflen, NULL, NULL); | |
2159 | if (utflen) | |
2160 | return utflen - 1; | |
2161 | errno = ERANGE; | |
2162 | return -1; | |
2163 | } | |
2164 | ||
2165 | static void setup_windows_environment(void) | |
2166 | { | |
2167 | char *tmp = getenv("TMPDIR"); | |
2168 | ||
2169 | /* on Windows it is TMP and TEMP */ | |
2170 | if (!tmp) { | |
2171 | if (!(tmp = getenv("TMP"))) | |
2172 | tmp = getenv("TEMP"); | |
2173 | if (tmp) { | |
2174 | setenv("TMPDIR", tmp, 1); | |
2175 | tmp = getenv("TMPDIR"); | |
2176 | } | |
2177 | } | |
2178 | ||
2179 | if (tmp) { | |
2180 | /* | |
2181 | * Convert all dir separators to forward slashes, | |
2182 | * to help shell commands called from the Git | |
2183 | * executable (by not mistaking the dir separators | |
2184 | * for escape characters). | |
2185 | */ | |
2186 | convert_slashes(tmp); | |
2187 | } | |
2188 | ||
2189 | /* simulate TERM to enable auto-color (see color.c) */ | |
2190 | if (!getenv("TERM")) | |
2191 | setenv("TERM", "cygwin", 1); | |
2192 | } | |
2193 | ||
2194 | /* | |
2195 | * Disable MSVCRT command line wildcard expansion (__getmainargs called from | |
2196 | * mingw startup code, see init.c in mingw runtime). | |
2197 | */ | |
2198 | int _CRT_glob = 0; | |
2199 | ||
2200 | typedef struct { | |
2201 | int newmode; | |
2202 | } _startupinfo; | |
2203 | ||
2204 | extern int __wgetmainargs(int *argc, wchar_t ***argv, wchar_t ***env, int glob, | |
2205 | _startupinfo *si); | |
2206 | ||
2207 | static NORETURN void die_startup(void) | |
2208 | { | |
2209 | fputs("fatal: not enough memory for initialization", stderr); | |
2210 | exit(128); | |
2211 | } | |
2212 | ||
2213 | static void *malloc_startup(size_t size) | |
2214 | { | |
2215 | void *result = malloc(size); | |
2216 | if (!result) | |
2217 | die_startup(); | |
2218 | return result; | |
2219 | } | |
2220 | ||
2221 | static char *wcstoutfdup_startup(char *buffer, const wchar_t *wcs, size_t len) | |
2222 | { | |
2223 | len = xwcstoutf(buffer, wcs, len) + 1; | |
2224 | return memcpy(malloc_startup(len), buffer, len); | |
2225 | } | |
2226 | ||
2227 | static void maybe_redirect_std_handle(const wchar_t *key, DWORD std_id, int fd, | |
2228 | DWORD desired_access, DWORD flags) | |
2229 | { | |
2230 | DWORD create_flag = fd ? OPEN_ALWAYS : OPEN_EXISTING; | |
2231 | wchar_t buf[MAX_PATH]; | |
2232 | DWORD max = ARRAY_SIZE(buf); | |
2233 | HANDLE handle; | |
2234 | DWORD ret = GetEnvironmentVariableW(key, buf, max); | |
2235 | ||
2236 | if (!ret || ret >= max) | |
2237 | return; | |
2238 | ||
2239 | /* make sure this does not leak into child processes */ | |
2240 | SetEnvironmentVariableW(key, NULL); | |
2241 | if (!wcscmp(buf, L"off")) { | |
2242 | close(fd); | |
2243 | handle = GetStdHandle(std_id); | |
2244 | if (handle != INVALID_HANDLE_VALUE) | |
2245 | CloseHandle(handle); | |
2246 | return; | |
2247 | } | |
2248 | if (std_id == STD_ERROR_HANDLE && !wcscmp(buf, L"2>&1")) { | |
2249 | handle = GetStdHandle(STD_OUTPUT_HANDLE); | |
2250 | if (handle == INVALID_HANDLE_VALUE) { | |
2251 | close(fd); | |
2252 | handle = GetStdHandle(std_id); | |
2253 | if (handle != INVALID_HANDLE_VALUE) | |
2254 | CloseHandle(handle); | |
2255 | } else { | |
2256 | int new_fd = _open_osfhandle((intptr_t)handle, O_BINARY); | |
2257 | SetStdHandle(std_id, handle); | |
2258 | dup2(new_fd, fd); | |
2259 | /* do *not* close the new_fd: that would close stdout */ | |
2260 | } | |
2261 | return; | |
2262 | } | |
2263 | handle = CreateFileW(buf, desired_access, 0, NULL, create_flag, | |
2264 | flags, NULL); | |
2265 | if (handle != INVALID_HANDLE_VALUE) { | |
2266 | int new_fd = _open_osfhandle((intptr_t)handle, O_BINARY); | |
2267 | SetStdHandle(std_id, handle); | |
2268 | dup2(new_fd, fd); | |
2269 | close(new_fd); | |
2270 | } | |
2271 | } | |
2272 | ||
2273 | static void maybe_redirect_std_handles(void) | |
2274 | { | |
2275 | maybe_redirect_std_handle(L"GIT_REDIRECT_STDIN", STD_INPUT_HANDLE, 0, | |
2276 | GENERIC_READ, FILE_ATTRIBUTE_NORMAL); | |
2277 | maybe_redirect_std_handle(L"GIT_REDIRECT_STDOUT", STD_OUTPUT_HANDLE, 1, | |
2278 | GENERIC_WRITE, FILE_ATTRIBUTE_NORMAL); | |
2279 | maybe_redirect_std_handle(L"GIT_REDIRECT_STDERR", STD_ERROR_HANDLE, 2, | |
2280 | GENERIC_WRITE, FILE_FLAG_NO_BUFFERING); | |
2281 | } | |
2282 | ||
2283 | void mingw_startup(void) | |
2284 | { | |
2285 | int i, maxlen, argc; | |
2286 | char *buffer; | |
2287 | wchar_t **wenv, **wargv; | |
2288 | _startupinfo si; | |
2289 | ||
2290 | maybe_redirect_std_handles(); | |
2291 | ||
2292 | /* get wide char arguments and environment */ | |
2293 | si.newmode = 0; | |
2294 | if (__wgetmainargs(&argc, &wargv, &wenv, _CRT_glob, &si) < 0) | |
2295 | die_startup(); | |
2296 | ||
2297 | /* determine size of argv and environ conversion buffer */ | |
2298 | maxlen = wcslen(wargv[0]); | |
2299 | for (i = 1; i < argc; i++) | |
2300 | maxlen = max(maxlen, wcslen(wargv[i])); | |
2301 | for (i = 0; wenv[i]; i++) | |
2302 | maxlen = max(maxlen, wcslen(wenv[i])); | |
2303 | ||
2304 | /* | |
2305 | * nedmalloc can't free CRT memory, allocate resizable environment | |
2306 | * list. Note that xmalloc / xmemdupz etc. call getenv, so we cannot | |
2307 | * use it while initializing the environment itself. | |
2308 | */ | |
2309 | environ_size = i + 1; | |
2310 | environ_alloc = alloc_nr(environ_size * sizeof(char*)); | |
2311 | environ = malloc_startup(environ_alloc); | |
2312 | ||
2313 | /* allocate buffer (wchar_t encodes to max 3 UTF-8 bytes) */ | |
2314 | maxlen = 3 * maxlen + 1; | |
2315 | buffer = malloc_startup(maxlen); | |
2316 | ||
2317 | /* convert command line arguments and environment to UTF-8 */ | |
2318 | for (i = 0; i < argc; i++) | |
2319 | __argv[i] = wcstoutfdup_startup(buffer, wargv[i], maxlen); | |
2320 | for (i = 0; wenv[i]; i++) | |
2321 | environ[i] = wcstoutfdup_startup(buffer, wenv[i], maxlen); | |
2322 | environ[i] = NULL; | |
2323 | free(buffer); | |
2324 | ||
2325 | /* sort environment for O(log n) getenv / putenv */ | |
2326 | qsort(environ, i, sizeof(char*), compareenv); | |
2327 | ||
2328 | /* fix Windows specific environment settings */ | |
2329 | setup_windows_environment(); | |
2330 | ||
2331 | /* initialize critical section for waitpid pinfo_t list */ | |
2332 | InitializeCriticalSection(&pinfo_cs); | |
2333 | ||
2334 | /* set up default file mode and file modes for stdin/out/err */ | |
2335 | _fmode = _O_BINARY; | |
2336 | _setmode(_fileno(stdin), _O_BINARY); | |
2337 | _setmode(_fileno(stdout), _O_BINARY); | |
2338 | _setmode(_fileno(stderr), _O_BINARY); | |
2339 | ||
2340 | /* initialize Unicode console */ | |
2341 | winansi_init(); | |
2342 | } | |
2343 | ||
2344 | int uname(struct utsname *buf) | |
2345 | { | |
2346 | unsigned v = (unsigned)GetVersion(); | |
2347 | memset(buf, 0, sizeof(*buf)); | |
2348 | xsnprintf(buf->sysname, sizeof(buf->sysname), "Windows"); | |
2349 | xsnprintf(buf->release, sizeof(buf->release), | |
2350 | "%u.%u", v & 0xff, (v >> 8) & 0xff); | |
2351 | /* assuming NT variants only.. */ | |
2352 | xsnprintf(buf->version, sizeof(buf->version), | |
2353 | "%u", (v >> 16) & 0x7fff); | |
2354 | return 0; | |
2355 | } |