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