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e579e0f7 MB |
1 | /* |
2 | * Copyright (C) the libgit2 contributors. All rights reserved. | |
3 | * | |
4 | * This file is part of libgit2, distributed under the GNU GPL v2 with | |
5 | * a Linking Exception. For full terms see the included COPYING file. | |
6 | */ | |
7 | ||
8 | #include "fs_path.h" | |
9 | ||
ad5611d8 TR |
10 | #include "git2_util.h" |
11 | #include "futils.h" | |
e579e0f7 | 12 | #include "posix.h" |
e579e0f7 MB |
13 | #ifdef GIT_WIN32 |
14 | #include "win32/posix.h" | |
15 | #include "win32/w32_buffer.h" | |
16 | #include "win32/w32_util.h" | |
17 | #include "win32/version.h" | |
18 | #include <aclapi.h> | |
19 | #else | |
20 | #include <dirent.h> | |
21 | #endif | |
22 | #include <stdio.h> | |
23 | #include <ctype.h> | |
24 | ||
ad5611d8 TR |
25 | #define ensure_error_set(code) do { \ |
26 | const git_error *e = git_error_last(); \ | |
27 | if (!e || !e->message) \ | |
28 | git_error_set(e ? e->klass : GIT_ERROR_CALLBACK, \ | |
29 | "filesystem callback returned %d", code); \ | |
30 | } while(0) | |
31 | ||
e579e0f7 MB |
32 | static int dos_drive_prefix_length(const char *path) |
33 | { | |
34 | int i; | |
35 | ||
36 | /* | |
37 | * Does it start with an ASCII letter (i.e. highest bit not set), | |
38 | * followed by a colon? | |
39 | */ | |
40 | if (!(0x80 & (unsigned char)*path)) | |
41 | return *path && path[1] == ':' ? 2 : 0; | |
42 | ||
43 | /* | |
44 | * While drive letters must be letters of the English alphabet, it is | |
45 | * possible to assign virtually _any_ Unicode character via `subst` as | |
46 | * a drive letter to "virtual drives". Even `1`, or `ä`. Or fun stuff | |
47 | * like this: | |
48 | * | |
49 | * subst ֍: %USERPROFILE%\Desktop | |
50 | */ | |
51 | for (i = 1; i < 4 && (0x80 & (unsigned char)path[i]); i++) | |
52 | ; /* skip first UTF-8 character */ | |
53 | return path[i] == ':' ? i + 1 : 0; | |
54 | } | |
55 | ||
56 | #ifdef GIT_WIN32 | |
57 | static bool looks_like_network_computer_name(const char *path, int pos) | |
58 | { | |
59 | if (pos < 3) | |
60 | return false; | |
61 | ||
62 | if (path[0] != '/' || path[1] != '/') | |
63 | return false; | |
64 | ||
65 | while (pos-- > 2) { | |
66 | if (path[pos] == '/') | |
67 | return false; | |
68 | } | |
69 | ||
70 | return true; | |
71 | } | |
72 | #endif | |
73 | ||
74 | /* | |
75 | * Based on the Android implementation, BSD licensed. | |
76 | * http://android.git.kernel.org/ | |
77 | * | |
78 | * Copyright (C) 2008 The Android Open Source Project | |
79 | * All rights reserved. | |
80 | * | |
81 | * Redistribution and use in source and binary forms, with or without | |
82 | * modification, are permitted provided that the following conditions | |
83 | * are met: | |
84 | * * Redistributions of source code must retain the above copyright | |
85 | * notice, this list of conditions and the following disclaimer. | |
86 | * * Redistributions in binary form must reproduce the above copyright | |
87 | * notice, this list of conditions and the following disclaimer in | |
88 | * the documentation and/or other materials provided with the | |
89 | * distribution. | |
90 | * | |
91 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |
92 | * AS IS AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | |
93 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS | |
94 | * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE | |
95 | * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, | |
96 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, | |
97 | * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS | |
98 | * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED | |
99 | * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, | |
100 | * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT | |
101 | * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
102 | * SUCH DAMAGE. | |
103 | */ | |
104 | int git_fs_path_basename_r(git_str *buffer, const char *path) | |
105 | { | |
106 | const char *endp, *startp; | |
107 | int len, result; | |
108 | ||
109 | /* Empty or NULL string gets treated as "." */ | |
110 | if (path == NULL || *path == '\0') { | |
111 | startp = "."; | |
ad5611d8 | 112 | len = 1; |
e579e0f7 MB |
113 | goto Exit; |
114 | } | |
115 | ||
116 | /* Strip trailing slashes */ | |
117 | endp = path + strlen(path) - 1; | |
118 | while (endp > path && *endp == '/') | |
119 | endp--; | |
120 | ||
121 | /* All slashes becomes "/" */ | |
122 | if (endp == path && *endp == '/') { | |
123 | startp = "/"; | |
ad5611d8 | 124 | len = 1; |
e579e0f7 MB |
125 | goto Exit; |
126 | } | |
127 | ||
128 | /* Find the start of the base */ | |
129 | startp = endp; | |
130 | while (startp > path && *(startp - 1) != '/') | |
131 | startp--; | |
132 | ||
133 | /* Cast is safe because max path < max int */ | |
134 | len = (int)(endp - startp + 1); | |
135 | ||
136 | Exit: | |
137 | result = len; | |
138 | ||
139 | if (buffer != NULL && git_str_set(buffer, startp, len) < 0) | |
140 | return -1; | |
141 | ||
142 | return result; | |
143 | } | |
144 | ||
145 | /* | |
146 | * Determine if the path is a Windows prefix and, if so, returns | |
147 | * its actual length. If it is not a prefix, returns -1. | |
148 | */ | |
149 | static int win32_prefix_length(const char *path, int len) | |
150 | { | |
151 | #ifndef GIT_WIN32 | |
152 | GIT_UNUSED(path); | |
153 | GIT_UNUSED(len); | |
154 | #else | |
155 | /* | |
156 | * Mimic unix behavior where '/.git' returns '/': 'C:/.git' | |
157 | * will return 'C:/' here | |
158 | */ | |
159 | if (dos_drive_prefix_length(path) == len) | |
160 | return len; | |
161 | ||
162 | /* | |
163 | * Similarly checks if we're dealing with a network computer name | |
164 | * '//computername/.git' will return '//computername/' | |
165 | */ | |
166 | if (looks_like_network_computer_name(path, len)) | |
167 | return len; | |
168 | #endif | |
169 | ||
170 | return -1; | |
171 | } | |
172 | ||
173 | /* | |
174 | * Based on the Android implementation, BSD licensed. | |
175 | * Check http://android.git.kernel.org/ | |
176 | */ | |
177 | int git_fs_path_dirname_r(git_str *buffer, const char *path) | |
178 | { | |
179 | const char *endp; | |
180 | int is_prefix = 0, len; | |
181 | ||
182 | /* Empty or NULL string gets treated as "." */ | |
183 | if (path == NULL || *path == '\0') { | |
184 | path = "."; | |
185 | len = 1; | |
186 | goto Exit; | |
187 | } | |
188 | ||
189 | /* Strip trailing slashes */ | |
190 | endp = path + strlen(path) - 1; | |
191 | while (endp > path && *endp == '/') | |
192 | endp--; | |
193 | ||
194 | if (endp - path + 1 > INT_MAX) { | |
195 | git_error_set(GIT_ERROR_INVALID, "path too long"); | |
ad5611d8 | 196 | return -1; |
e579e0f7 MB |
197 | } |
198 | ||
199 | if ((len = win32_prefix_length(path, (int)(endp - path + 1))) > 0) { | |
200 | is_prefix = 1; | |
201 | goto Exit; | |
202 | } | |
203 | ||
204 | /* Find the start of the dir */ | |
205 | while (endp > path && *endp != '/') | |
206 | endp--; | |
207 | ||
208 | /* Either the dir is "/" or there are no slashes */ | |
209 | if (endp == path) { | |
210 | path = (*endp == '/') ? "/" : "."; | |
211 | len = 1; | |
212 | goto Exit; | |
213 | } | |
214 | ||
215 | do { | |
216 | endp--; | |
217 | } while (endp > path && *endp == '/'); | |
218 | ||
219 | if (endp - path + 1 > INT_MAX) { | |
220 | git_error_set(GIT_ERROR_INVALID, "path too long"); | |
ad5611d8 | 221 | return -1; |
e579e0f7 MB |
222 | } |
223 | ||
224 | if ((len = win32_prefix_length(path, (int)(endp - path + 1))) > 0) { | |
225 | is_prefix = 1; | |
226 | goto Exit; | |
227 | } | |
228 | ||
229 | /* Cast is safe because max path < max int */ | |
230 | len = (int)(endp - path + 1); | |
231 | ||
232 | Exit: | |
233 | if (buffer) { | |
234 | if (git_str_set(buffer, path, len) < 0) | |
235 | return -1; | |
236 | if (is_prefix && git_str_putc(buffer, '/') < 0) | |
237 | return -1; | |
238 | } | |
239 | ||
240 | return len; | |
241 | } | |
242 | ||
243 | ||
244 | char *git_fs_path_dirname(const char *path) | |
245 | { | |
246 | git_str buf = GIT_STR_INIT; | |
247 | char *dirname; | |
248 | ||
249 | git_fs_path_dirname_r(&buf, path); | |
250 | dirname = git_str_detach(&buf); | |
251 | git_str_dispose(&buf); /* avoid memleak if error occurs */ | |
252 | ||
253 | return dirname; | |
254 | } | |
255 | ||
256 | char *git_fs_path_basename(const char *path) | |
257 | { | |
258 | git_str buf = GIT_STR_INIT; | |
259 | char *basename; | |
260 | ||
261 | git_fs_path_basename_r(&buf, path); | |
262 | basename = git_str_detach(&buf); | |
263 | git_str_dispose(&buf); /* avoid memleak if error occurs */ | |
264 | ||
265 | return basename; | |
266 | } | |
267 | ||
268 | size_t git_fs_path_basename_offset(git_str *buffer) | |
269 | { | |
270 | ssize_t slash; | |
271 | ||
272 | if (!buffer || buffer->size <= 0) | |
273 | return 0; | |
274 | ||
275 | slash = git_str_rfind_next(buffer, '/'); | |
276 | ||
277 | if (slash >= 0 && buffer->ptr[slash] == '/') | |
278 | return (size_t)(slash + 1); | |
279 | ||
280 | return 0; | |
281 | } | |
282 | ||
283 | int git_fs_path_root(const char *path) | |
284 | { | |
285 | int offset = 0, prefix_len; | |
286 | ||
287 | /* Does the root of the path look like a windows drive ? */ | |
288 | if ((prefix_len = dos_drive_prefix_length(path))) | |
289 | offset += prefix_len; | |
290 | ||
291 | #ifdef GIT_WIN32 | |
292 | /* Are we dealing with a windows network path? */ | |
293 | else if ((path[0] == '/' && path[1] == '/' && path[2] != '/') || | |
294 | (path[0] == '\\' && path[1] == '\\' && path[2] != '\\')) | |
295 | { | |
296 | offset += 2; | |
297 | ||
298 | /* Skip the computer name segment */ | |
299 | while (path[offset] && path[offset] != '/' && path[offset] != '\\') | |
300 | offset++; | |
301 | } | |
302 | ||
303 | if (path[offset] == '\\') | |
304 | return offset; | |
305 | #endif | |
306 | ||
307 | if (path[offset] == '/') | |
308 | return offset; | |
309 | ||
310 | return -1; /* Not a real error - signals that path is not rooted */ | |
311 | } | |
312 | ||
313 | static void path_trim_slashes(git_str *path) | |
314 | { | |
315 | int ceiling = git_fs_path_root(path->ptr) + 1; | |
316 | ||
317 | if (ceiling < 0) | |
318 | return; | |
319 | ||
320 | while (path->size > (size_t)ceiling) { | |
321 | if (path->ptr[path->size-1] != '/') | |
322 | break; | |
323 | ||
324 | path->ptr[path->size-1] = '\0'; | |
325 | path->size--; | |
326 | } | |
327 | } | |
328 | ||
329 | int git_fs_path_join_unrooted( | |
330 | git_str *path_out, const char *path, const char *base, ssize_t *root_at) | |
331 | { | |
332 | ssize_t root; | |
333 | ||
334 | GIT_ASSERT_ARG(path_out); | |
335 | GIT_ASSERT_ARG(path); | |
336 | ||
337 | root = (ssize_t)git_fs_path_root(path); | |
338 | ||
339 | if (base != NULL && root < 0) { | |
340 | if (git_str_joinpath(path_out, base, path) < 0) | |
341 | return -1; | |
342 | ||
343 | root = (ssize_t)strlen(base); | |
344 | } else { | |
345 | if (git_str_sets(path_out, path) < 0) | |
346 | return -1; | |
347 | ||
348 | if (root < 0) | |
349 | root = 0; | |
350 | else if (base) | |
351 | git_fs_path_equal_or_prefixed(base, path, &root); | |
352 | } | |
353 | ||
354 | if (root_at) | |
355 | *root_at = root; | |
356 | ||
357 | return 0; | |
358 | } | |
359 | ||
360 | void git_fs_path_squash_slashes(git_str *path) | |
361 | { | |
362 | char *p, *q; | |
363 | ||
364 | if (path->size == 0) | |
365 | return; | |
366 | ||
367 | for (p = path->ptr, q = path->ptr; *q; p++, q++) { | |
368 | *p = *q; | |
369 | ||
370 | while (*q == '/' && *(q+1) == '/') { | |
371 | path->size--; | |
372 | q++; | |
373 | } | |
374 | } | |
375 | ||
376 | *p = '\0'; | |
377 | } | |
378 | ||
379 | int git_fs_path_prettify(git_str *path_out, const char *path, const char *base) | |
380 | { | |
381 | char buf[GIT_PATH_MAX]; | |
382 | ||
383 | GIT_ASSERT_ARG(path_out); | |
384 | GIT_ASSERT_ARG(path); | |
385 | ||
386 | /* construct path if needed */ | |
387 | if (base != NULL && git_fs_path_root(path) < 0) { | |
388 | if (git_str_joinpath(path_out, base, path) < 0) | |
389 | return -1; | |
390 | path = path_out->ptr; | |
391 | } | |
392 | ||
393 | if (p_realpath(path, buf) == NULL) { | |
394 | /* git_error_set resets the errno when dealing with a GIT_ERROR_OS kind of error */ | |
395 | int error = (errno == ENOENT || errno == ENOTDIR) ? GIT_ENOTFOUND : -1; | |
396 | git_error_set(GIT_ERROR_OS, "failed to resolve path '%s'", path); | |
397 | ||
398 | git_str_clear(path_out); | |
399 | ||
400 | return error; | |
401 | } | |
402 | ||
403 | return git_str_sets(path_out, buf); | |
404 | } | |
405 | ||
406 | int git_fs_path_prettify_dir(git_str *path_out, const char *path, const char *base) | |
407 | { | |
408 | int error = git_fs_path_prettify(path_out, path, base); | |
409 | return (error < 0) ? error : git_fs_path_to_dir(path_out); | |
410 | } | |
411 | ||
412 | int git_fs_path_to_dir(git_str *path) | |
413 | { | |
414 | if (path->asize > 0 && | |
415 | git_str_len(path) > 0 && | |
416 | path->ptr[git_str_len(path) - 1] != '/') | |
417 | git_str_putc(path, '/'); | |
418 | ||
419 | return git_str_oom(path) ? -1 : 0; | |
420 | } | |
421 | ||
422 | void git_fs_path_string_to_dir(char *path, size_t size) | |
423 | { | |
424 | size_t end = strlen(path); | |
425 | ||
426 | if (end && path[end - 1] != '/' && end < size) { | |
427 | path[end] = '/'; | |
428 | path[end + 1] = '\0'; | |
429 | } | |
430 | } | |
431 | ||
432 | int git__percent_decode(git_str *decoded_out, const char *input) | |
433 | { | |
434 | int len, hi, lo, i; | |
435 | ||
436 | GIT_ASSERT_ARG(decoded_out); | |
437 | GIT_ASSERT_ARG(input); | |
438 | ||
439 | len = (int)strlen(input); | |
440 | git_str_clear(decoded_out); | |
441 | ||
442 | for(i = 0; i < len; i++) | |
443 | { | |
444 | char c = input[i]; | |
445 | ||
446 | if (c != '%') | |
447 | goto append; | |
448 | ||
449 | if (i >= len - 2) | |
450 | goto append; | |
451 | ||
452 | hi = git__fromhex(input[i + 1]); | |
453 | lo = git__fromhex(input[i + 2]); | |
454 | ||
455 | if (hi < 0 || lo < 0) | |
456 | goto append; | |
457 | ||
458 | c = (char)(hi << 4 | lo); | |
459 | i += 2; | |
460 | ||
461 | append: | |
462 | if (git_str_putc(decoded_out, c) < 0) | |
463 | return -1; | |
464 | } | |
465 | ||
466 | return 0; | |
467 | } | |
468 | ||
469 | static int error_invalid_local_file_uri(const char *uri) | |
470 | { | |
471 | git_error_set(GIT_ERROR_CONFIG, "'%s' is not a valid local file URI", uri); | |
472 | return -1; | |
473 | } | |
474 | ||
475 | static int local_file_url_prefixlen(const char *file_url) | |
476 | { | |
477 | int len = -1; | |
478 | ||
479 | if (git__prefixcmp(file_url, "file://") == 0) { | |
480 | if (file_url[7] == '/') | |
481 | len = 8; | |
482 | else if (git__prefixcmp(file_url + 7, "localhost/") == 0) | |
483 | len = 17; | |
484 | } | |
485 | ||
486 | return len; | |
487 | } | |
488 | ||
489 | bool git_fs_path_is_local_file_url(const char *file_url) | |
490 | { | |
491 | return (local_file_url_prefixlen(file_url) > 0); | |
492 | } | |
493 | ||
494 | int git_fs_path_fromurl(git_str *local_path_out, const char *file_url) | |
495 | { | |
496 | int offset; | |
497 | ||
498 | GIT_ASSERT_ARG(local_path_out); | |
499 | GIT_ASSERT_ARG(file_url); | |
500 | ||
501 | if ((offset = local_file_url_prefixlen(file_url)) < 0 || | |
502 | file_url[offset] == '\0' || file_url[offset] == '/') | |
503 | return error_invalid_local_file_uri(file_url); | |
504 | ||
505 | #ifndef GIT_WIN32 | |
506 | offset--; /* A *nix absolute path starts with a forward slash */ | |
507 | #endif | |
508 | ||
509 | git_str_clear(local_path_out); | |
510 | return git__percent_decode(local_path_out, file_url + offset); | |
511 | } | |
512 | ||
513 | int git_fs_path_walk_up( | |
514 | git_str *path, | |
515 | const char *ceiling, | |
516 | int (*cb)(void *data, const char *), | |
517 | void *data) | |
518 | { | |
519 | int error = 0; | |
520 | git_str iter; | |
521 | ssize_t stop = 0, scan; | |
522 | char oldc = '\0'; | |
523 | ||
524 | GIT_ASSERT_ARG(path); | |
525 | GIT_ASSERT_ARG(cb); | |
526 | ||
527 | if (ceiling != NULL) { | |
528 | if (git__prefixcmp(path->ptr, ceiling) == 0) | |
529 | stop = (ssize_t)strlen(ceiling); | |
530 | else | |
531 | stop = git_str_len(path); | |
532 | } | |
533 | scan = git_str_len(path); | |
534 | ||
535 | /* empty path: yield only once */ | |
536 | if (!scan) { | |
537 | error = cb(data, ""); | |
538 | if (error) | |
ad5611d8 | 539 | ensure_error_set(error); |
e579e0f7 MB |
540 | return error; |
541 | } | |
542 | ||
543 | iter.ptr = path->ptr; | |
544 | iter.size = git_str_len(path); | |
545 | iter.asize = path->asize; | |
546 | ||
547 | while (scan >= stop) { | |
548 | error = cb(data, iter.ptr); | |
549 | iter.ptr[scan] = oldc; | |
550 | ||
551 | if (error) { | |
ad5611d8 | 552 | ensure_error_set(error); |
e579e0f7 MB |
553 | break; |
554 | } | |
555 | ||
556 | scan = git_str_rfind_next(&iter, '/'); | |
557 | if (scan >= 0) { | |
558 | scan++; | |
559 | oldc = iter.ptr[scan]; | |
560 | iter.size = scan; | |
561 | iter.ptr[scan] = '\0'; | |
562 | } | |
563 | } | |
564 | ||
565 | if (scan >= 0) | |
566 | iter.ptr[scan] = oldc; | |
567 | ||
568 | /* relative path: yield for the last component */ | |
569 | if (!error && stop == 0 && iter.ptr[0] != '/') { | |
570 | error = cb(data, ""); | |
571 | if (error) | |
ad5611d8 | 572 | ensure_error_set(error); |
e579e0f7 MB |
573 | } |
574 | ||
575 | return error; | |
576 | } | |
577 | ||
578 | bool git_fs_path_exists(const char *path) | |
579 | { | |
580 | GIT_ASSERT_ARG_WITH_RETVAL(path, false); | |
581 | return p_access(path, F_OK) == 0; | |
582 | } | |
583 | ||
584 | bool git_fs_path_isdir(const char *path) | |
585 | { | |
586 | struct stat st; | |
587 | if (p_stat(path, &st) < 0) | |
588 | return false; | |
589 | ||
590 | return S_ISDIR(st.st_mode) != 0; | |
591 | } | |
592 | ||
593 | bool git_fs_path_isfile(const char *path) | |
594 | { | |
595 | struct stat st; | |
596 | ||
597 | GIT_ASSERT_ARG_WITH_RETVAL(path, false); | |
598 | if (p_stat(path, &st) < 0) | |
599 | return false; | |
600 | ||
601 | return S_ISREG(st.st_mode) != 0; | |
602 | } | |
603 | ||
604 | bool git_fs_path_islink(const char *path) | |
605 | { | |
606 | struct stat st; | |
607 | ||
608 | GIT_ASSERT_ARG_WITH_RETVAL(path, false); | |
609 | if (p_lstat(path, &st) < 0) | |
610 | return false; | |
611 | ||
612 | return S_ISLNK(st.st_mode) != 0; | |
613 | } | |
614 | ||
615 | #ifdef GIT_WIN32 | |
616 | ||
617 | bool git_fs_path_is_empty_dir(const char *path) | |
618 | { | |
619 | git_win32_path filter_w; | |
620 | bool empty = false; | |
621 | ||
622 | if (git_win32__findfirstfile_filter(filter_w, path)) { | |
623 | WIN32_FIND_DATAW findData; | |
624 | HANDLE hFind = FindFirstFileW(filter_w, &findData); | |
625 | ||
626 | /* FindFirstFile will fail if there are no children to the given | |
627 | * path, which can happen if the given path is a file (and obviously | |
628 | * has no children) or if the given path is an empty mount point. | |
629 | * (Most directories have at least directory entries '.' and '..', | |
630 | * but ridiculously another volume mounted in another drive letter's | |
631 | * path space do not, and thus have nothing to enumerate.) If | |
632 | * FindFirstFile fails, check if this is a directory-like thing | |
633 | * (a mount point). | |
634 | */ | |
635 | if (hFind == INVALID_HANDLE_VALUE) | |
636 | return git_fs_path_isdir(path); | |
637 | ||
638 | /* If the find handle was created successfully, then it's a directory */ | |
639 | empty = true; | |
640 | ||
641 | do { | |
642 | /* Allow the enumeration to return . and .. and still be considered | |
643 | * empty. In the special case of drive roots (i.e. C:\) where . and | |
644 | * .. do not occur, we can still consider the path to be an empty | |
645 | * directory if there's nothing there. */ | |
646 | if (!git_fs_path_is_dot_or_dotdotW(findData.cFileName)) { | |
647 | empty = false; | |
648 | break; | |
649 | } | |
650 | } while (FindNextFileW(hFind, &findData)); | |
651 | ||
652 | FindClose(hFind); | |
653 | } | |
654 | ||
655 | return empty; | |
656 | } | |
657 | ||
658 | #else | |
659 | ||
660 | static int path_found_entry(void *payload, git_str *path) | |
661 | { | |
662 | GIT_UNUSED(payload); | |
663 | return !git_fs_path_is_dot_or_dotdot(path->ptr); | |
664 | } | |
665 | ||
666 | bool git_fs_path_is_empty_dir(const char *path) | |
667 | { | |
668 | int error; | |
669 | git_str dir = GIT_STR_INIT; | |
670 | ||
671 | if (!git_fs_path_isdir(path)) | |
672 | return false; | |
673 | ||
674 | if ((error = git_str_sets(&dir, path)) != 0) | |
675 | git_error_clear(); | |
676 | else | |
677 | error = git_fs_path_direach(&dir, 0, path_found_entry, NULL); | |
678 | ||
679 | git_str_dispose(&dir); | |
680 | ||
681 | return !error; | |
682 | } | |
683 | ||
684 | #endif | |
685 | ||
686 | int git_fs_path_set_error(int errno_value, const char *path, const char *action) | |
687 | { | |
688 | switch (errno_value) { | |
689 | case ENOENT: | |
690 | case ENOTDIR: | |
691 | git_error_set(GIT_ERROR_OS, "could not find '%s' to %s", path, action); | |
692 | return GIT_ENOTFOUND; | |
693 | ||
694 | case EINVAL: | |
695 | case ENAMETOOLONG: | |
696 | git_error_set(GIT_ERROR_OS, "invalid path for filesystem '%s'", path); | |
697 | return GIT_EINVALIDSPEC; | |
698 | ||
699 | case EEXIST: | |
700 | git_error_set(GIT_ERROR_OS, "failed %s - '%s' already exists", action, path); | |
701 | return GIT_EEXISTS; | |
702 | ||
703 | case EACCES: | |
704 | git_error_set(GIT_ERROR_OS, "failed %s - '%s' is locked", action, path); | |
705 | return GIT_ELOCKED; | |
706 | ||
707 | default: | |
708 | git_error_set(GIT_ERROR_OS, "could not %s '%s'", action, path); | |
709 | return -1; | |
710 | } | |
711 | } | |
712 | ||
713 | int git_fs_path_lstat(const char *path, struct stat *st) | |
714 | { | |
715 | if (p_lstat(path, st) == 0) | |
716 | return 0; | |
717 | ||
718 | return git_fs_path_set_error(errno, path, "stat"); | |
719 | } | |
720 | ||
721 | static bool _check_dir_contents( | |
722 | git_str *dir, | |
723 | const char *sub, | |
724 | bool (*predicate)(const char *)) | |
725 | { | |
726 | bool result; | |
727 | size_t dir_size = git_str_len(dir); | |
728 | size_t sub_size = strlen(sub); | |
729 | size_t alloc_size; | |
730 | ||
731 | /* leave base valid even if we could not make space for subdir */ | |
732 | if (GIT_ADD_SIZET_OVERFLOW(&alloc_size, dir_size, sub_size) || | |
733 | GIT_ADD_SIZET_OVERFLOW(&alloc_size, alloc_size, 2) || | |
734 | git_str_try_grow(dir, alloc_size, false) < 0) | |
735 | return false; | |
736 | ||
737 | /* save excursion */ | |
738 | if (git_str_joinpath(dir, dir->ptr, sub) < 0) | |
739 | return false; | |
740 | ||
741 | result = predicate(dir->ptr); | |
742 | ||
743 | /* restore path */ | |
744 | git_str_truncate(dir, dir_size); | |
745 | return result; | |
746 | } | |
747 | ||
748 | bool git_fs_path_contains(git_str *dir, const char *item) | |
749 | { | |
750 | return _check_dir_contents(dir, item, &git_fs_path_exists); | |
751 | } | |
752 | ||
753 | bool git_fs_path_contains_dir(git_str *base, const char *subdir) | |
754 | { | |
755 | return _check_dir_contents(base, subdir, &git_fs_path_isdir); | |
756 | } | |
757 | ||
758 | bool git_fs_path_contains_file(git_str *base, const char *file) | |
759 | { | |
760 | return _check_dir_contents(base, file, &git_fs_path_isfile); | |
761 | } | |
762 | ||
763 | int git_fs_path_find_dir(git_str *dir) | |
764 | { | |
765 | int error = 0; | |
766 | char buf[GIT_PATH_MAX]; | |
767 | ||
768 | if (p_realpath(dir->ptr, buf) != NULL) | |
769 | error = git_str_sets(dir, buf); | |
770 | ||
771 | /* call dirname if this is not a directory */ | |
772 | if (!error) /* && git_fs_path_isdir(dir->ptr) == false) */ | |
773 | error = (git_fs_path_dirname_r(dir, dir->ptr) < 0) ? -1 : 0; | |
774 | ||
775 | if (!error) | |
776 | error = git_fs_path_to_dir(dir); | |
777 | ||
778 | return error; | |
779 | } | |
780 | ||
781 | int git_fs_path_resolve_relative(git_str *path, size_t ceiling) | |
782 | { | |
783 | char *base, *to, *from, *next; | |
784 | size_t len; | |
785 | ||
786 | GIT_ERROR_CHECK_ALLOC_STR(path); | |
787 | ||
788 | if (ceiling > path->size) | |
789 | ceiling = path->size; | |
790 | ||
791 | /* recognize drive prefixes, etc. that should not be backed over */ | |
792 | if (ceiling == 0) | |
793 | ceiling = git_fs_path_root(path->ptr) + 1; | |
794 | ||
795 | /* recognize URL prefixes that should not be backed over */ | |
796 | if (ceiling == 0) { | |
797 | for (next = path->ptr; *next && git__isalpha(*next); ++next); | |
798 | if (next[0] == ':' && next[1] == '/' && next[2] == '/') | |
799 | ceiling = (next + 3) - path->ptr; | |
800 | } | |
801 | ||
802 | base = to = from = path->ptr + ceiling; | |
803 | ||
804 | while (*from) { | |
805 | for (next = from; *next && *next != '/'; ++next); | |
806 | ||
807 | len = next - from; | |
808 | ||
809 | if (len == 1 && from[0] == '.') | |
810 | /* do nothing with singleton dot */; | |
811 | ||
812 | else if (len == 2 && from[0] == '.' && from[1] == '.') { | |
813 | /* error out if trying to up one from a hard base */ | |
814 | if (to == base && ceiling != 0) { | |
815 | git_error_set(GIT_ERROR_INVALID, | |
816 | "cannot strip root component off url"); | |
817 | return -1; | |
818 | } | |
819 | ||
820 | /* no more path segments to strip, | |
821 | * use '../' as a new base path */ | |
822 | if (to == base) { | |
823 | if (*next == '/') | |
824 | len++; | |
825 | ||
826 | if (to != from) | |
827 | memmove(to, from, len); | |
828 | ||
829 | to += len; | |
830 | /* this is now the base, can't back up from a | |
831 | * relative prefix */ | |
832 | base = to; | |
833 | } else { | |
834 | /* back up a path segment */ | |
835 | while (to > base && to[-1] == '/') to--; | |
836 | while (to > base && to[-1] != '/') to--; | |
837 | } | |
838 | } else { | |
839 | if (*next == '/' && *from != '/') | |
840 | len++; | |
841 | ||
842 | if (to != from) | |
843 | memmove(to, from, len); | |
844 | ||
845 | to += len; | |
846 | } | |
847 | ||
848 | from += len; | |
849 | ||
850 | while (*from == '/') from++; | |
851 | } | |
852 | ||
853 | *to = '\0'; | |
854 | ||
855 | path->size = to - path->ptr; | |
856 | ||
857 | return 0; | |
858 | } | |
859 | ||
860 | int git_fs_path_apply_relative(git_str *target, const char *relpath) | |
861 | { | |
862 | return git_str_joinpath(target, git_str_cstr(target), relpath) || | |
863 | git_fs_path_resolve_relative(target, 0); | |
864 | } | |
865 | ||
866 | int git_fs_path_cmp( | |
867 | const char *name1, size_t len1, int isdir1, | |
868 | const char *name2, size_t len2, int isdir2, | |
869 | int (*compare)(const char *, const char *, size_t)) | |
870 | { | |
871 | unsigned char c1, c2; | |
872 | size_t len = len1 < len2 ? len1 : len2; | |
873 | int cmp; | |
874 | ||
875 | cmp = compare(name1, name2, len); | |
876 | if (cmp) | |
877 | return cmp; | |
878 | ||
879 | c1 = name1[len]; | |
880 | c2 = name2[len]; | |
881 | ||
882 | if (c1 == '\0' && isdir1) | |
883 | c1 = '/'; | |
884 | ||
885 | if (c2 == '\0' && isdir2) | |
886 | c2 = '/'; | |
887 | ||
888 | return (c1 < c2) ? -1 : (c1 > c2) ? 1 : 0; | |
889 | } | |
890 | ||
891 | size_t git_fs_path_common_dirlen(const char *one, const char *two) | |
892 | { | |
893 | const char *p, *q, *dirsep = NULL; | |
894 | ||
895 | for (p = one, q = two; *p && *q; p++, q++) { | |
896 | if (*p == '/' && *q == '/') | |
897 | dirsep = p; | |
898 | else if (*p != *q) | |
899 | break; | |
900 | } | |
901 | ||
902 | return dirsep ? (dirsep - one) + 1 : 0; | |
903 | } | |
904 | ||
905 | int git_fs_path_make_relative(git_str *path, const char *parent) | |
906 | { | |
907 | const char *p, *q, *p_dirsep, *q_dirsep; | |
908 | size_t plen = path->size, newlen, alloclen, depth = 1, i, offset; | |
909 | ||
910 | for (p_dirsep = p = path->ptr, q_dirsep = q = parent; *p && *q; p++, q++) { | |
911 | if (*p == '/' && *q == '/') { | |
912 | p_dirsep = p; | |
913 | q_dirsep = q; | |
914 | } | |
915 | else if (*p != *q) | |
916 | break; | |
917 | } | |
918 | ||
919 | /* need at least 1 common path segment */ | |
920 | if ((p_dirsep == path->ptr || q_dirsep == parent) && | |
921 | (*p_dirsep != '/' || *q_dirsep != '/')) { | |
922 | git_error_set(GIT_ERROR_INVALID, | |
923 | "%s is not a parent of %s", parent, path->ptr); | |
924 | return GIT_ENOTFOUND; | |
925 | } | |
926 | ||
927 | if (*p == '/' && !*q) | |
928 | p++; | |
929 | else if (!*p && *q == '/') | |
930 | q++; | |
931 | else if (!*p && !*q) | |
932 | return git_str_clear(path), 0; | |
933 | else { | |
934 | p = p_dirsep + 1; | |
935 | q = q_dirsep + 1; | |
936 | } | |
937 | ||
938 | plen -= (p - path->ptr); | |
939 | ||
940 | if (!*q) | |
941 | return git_str_set(path, p, plen); | |
942 | ||
943 | for (; (q = strchr(q, '/')) && *(q + 1); q++) | |
944 | depth++; | |
945 | ||
946 | GIT_ERROR_CHECK_ALLOC_MULTIPLY(&newlen, depth, 3); | |
947 | GIT_ERROR_CHECK_ALLOC_ADD(&newlen, newlen, plen); | |
948 | ||
949 | GIT_ERROR_CHECK_ALLOC_ADD(&alloclen, newlen, 1); | |
950 | ||
951 | /* save the offset as we might realllocate the pointer */ | |
952 | offset = p - path->ptr; | |
953 | if (git_str_try_grow(path, alloclen, 1) < 0) | |
954 | return -1; | |
955 | p = path->ptr + offset; | |
956 | ||
957 | memmove(path->ptr + (depth * 3), p, plen + 1); | |
958 | ||
959 | for (i = 0; i < depth; i++) | |
960 | memcpy(path->ptr + (i * 3), "../", 3); | |
961 | ||
962 | path->size = newlen; | |
963 | return 0; | |
964 | } | |
965 | ||
966 | bool git_fs_path_has_non_ascii(const char *path, size_t pathlen) | |
967 | { | |
968 | const uint8_t *scan = (const uint8_t *)path, *end; | |
969 | ||
970 | for (end = scan + pathlen; scan < end; ++scan) | |
971 | if (*scan & 0x80) | |
972 | return true; | |
973 | ||
974 | return false; | |
975 | } | |
976 | ||
977 | #ifdef GIT_USE_ICONV | |
978 | ||
979 | int git_fs_path_iconv_init_precompose(git_fs_path_iconv_t *ic) | |
980 | { | |
981 | git_str_init(&ic->buf, 0); | |
982 | ic->map = iconv_open(GIT_PATH_REPO_ENCODING, GIT_PATH_NATIVE_ENCODING); | |
983 | return 0; | |
984 | } | |
985 | ||
986 | void git_fs_path_iconv_clear(git_fs_path_iconv_t *ic) | |
987 | { | |
988 | if (ic) { | |
989 | if (ic->map != (iconv_t)-1) | |
990 | iconv_close(ic->map); | |
991 | git_str_dispose(&ic->buf); | |
992 | } | |
993 | } | |
994 | ||
995 | int git_fs_path_iconv(git_fs_path_iconv_t *ic, const char **in, size_t *inlen) | |
996 | { | |
997 | char *nfd = (char*)*in, *nfc; | |
998 | size_t nfdlen = *inlen, nfclen, wantlen = nfdlen, alloclen, rv; | |
999 | int retry = 1; | |
1000 | ||
1001 | if (!ic || ic->map == (iconv_t)-1 || | |
1002 | !git_fs_path_has_non_ascii(*in, *inlen)) | |
1003 | return 0; | |
1004 | ||
1005 | git_str_clear(&ic->buf); | |
1006 | ||
1007 | while (1) { | |
1008 | GIT_ERROR_CHECK_ALLOC_ADD(&alloclen, wantlen, 1); | |
1009 | if (git_str_grow(&ic->buf, alloclen) < 0) | |
1010 | return -1; | |
1011 | ||
1012 | nfc = ic->buf.ptr + ic->buf.size; | |
1013 | nfclen = ic->buf.asize - ic->buf.size; | |
1014 | ||
1015 | rv = iconv(ic->map, &nfd, &nfdlen, &nfc, &nfclen); | |
1016 | ||
1017 | ic->buf.size = (nfc - ic->buf.ptr); | |
1018 | ||
1019 | if (rv != (size_t)-1) | |
1020 | break; | |
1021 | ||
1022 | /* if we cannot convert the data (probably because iconv thinks | |
1023 | * it is not valid UTF-8 source data), then use original data | |
1024 | */ | |
1025 | if (errno != E2BIG) | |
1026 | return 0; | |
1027 | ||
1028 | /* make space for 2x the remaining data to be converted | |
1029 | * (with per retry overhead to avoid infinite loops) | |
1030 | */ | |
1031 | wantlen = ic->buf.size + max(nfclen, nfdlen) * 2 + (size_t)(retry * 4); | |
1032 | ||
1033 | if (retry++ > 4) | |
1034 | goto fail; | |
1035 | } | |
1036 | ||
1037 | ic->buf.ptr[ic->buf.size] = '\0'; | |
1038 | ||
1039 | *in = ic->buf.ptr; | |
1040 | *inlen = ic->buf.size; | |
1041 | ||
1042 | return 0; | |
1043 | ||
1044 | fail: | |
1045 | git_error_set(GIT_ERROR_OS, "unable to convert unicode path data"); | |
1046 | return -1; | |
1047 | } | |
1048 | ||
1049 | static const char *nfc_file = "\xC3\x85\x73\x74\x72\xC3\xB6\x6D"; | |
1050 | static const char *nfd_file = "\x41\xCC\x8A\x73\x74\x72\x6F\xCC\x88\x6D"; | |
1051 | ||
1052 | /* Check if the platform is decomposing unicode data for us. We will | |
1053 | * emulate core Git and prefer to use precomposed unicode data internally | |
1054 | * on these platforms, composing the decomposed unicode on the fly. | |
1055 | * | |
1056 | * This mainly happens on the Mac where HDFS stores filenames as | |
1057 | * decomposed unicode. Even on VFAT and SAMBA file systems, the Mac will | |
1058 | * return decomposed unicode from readdir() even when the actual | |
1059 | * filesystem is storing precomposed unicode. | |
1060 | */ | |
1061 | bool git_fs_path_does_decompose_unicode(const char *root) | |
1062 | { | |
1063 | git_str nfc_path = GIT_STR_INIT; | |
1064 | git_str nfd_path = GIT_STR_INIT; | |
1065 | int fd; | |
1066 | bool found_decomposed = false; | |
1067 | size_t orig_len; | |
1068 | const char *trailer; | |
1069 | ||
1070 | /* Create a file using a precomposed path and then try to find it | |
1071 | * using the decomposed name. If the lookup fails, then we will mark | |
1072 | * that we should precompose unicode for this repository. | |
1073 | */ | |
1074 | if (git_str_joinpath(&nfc_path, root, nfc_file) < 0) | |
1075 | goto done; | |
1076 | ||
1077 | /* record original path length before trailer */ | |
1078 | orig_len = nfc_path.size; | |
1079 | ||
1080 | if ((fd = git_futils_mktmp(&nfc_path, nfc_path.ptr, 0666)) < 0) | |
1081 | goto done; | |
1082 | p_close(fd); | |
1083 | ||
1084 | trailer = nfc_path.ptr + orig_len; | |
1085 | ||
1086 | /* try to look up as NFD path */ | |
1087 | if (git_str_joinpath(&nfd_path, root, nfd_file) < 0 || | |
1088 | git_str_puts(&nfd_path, trailer) < 0) | |
1089 | goto done; | |
1090 | ||
1091 | found_decomposed = git_fs_path_exists(nfd_path.ptr); | |
1092 | ||
1093 | /* remove temporary file (using original precomposed path) */ | |
1094 | (void)p_unlink(nfc_path.ptr); | |
1095 | ||
1096 | done: | |
1097 | git_str_dispose(&nfc_path); | |
1098 | git_str_dispose(&nfd_path); | |
1099 | return found_decomposed; | |
1100 | } | |
1101 | ||
1102 | #else | |
1103 | ||
1104 | bool git_fs_path_does_decompose_unicode(const char *root) | |
1105 | { | |
1106 | GIT_UNUSED(root); | |
1107 | return false; | |
1108 | } | |
1109 | ||
1110 | #endif | |
1111 | ||
1112 | #if defined(__sun) || defined(__GNU__) | |
1113 | typedef char path_dirent_data[sizeof(struct dirent) + FILENAME_MAX + 1]; | |
1114 | #else | |
1115 | typedef struct dirent path_dirent_data; | |
1116 | #endif | |
1117 | ||
1118 | int git_fs_path_direach( | |
1119 | git_str *path, | |
1120 | uint32_t flags, | |
1121 | int (*fn)(void *, git_str *), | |
1122 | void *arg) | |
1123 | { | |
1124 | int error = 0; | |
1125 | ssize_t wd_len; | |
1126 | DIR *dir; | |
1127 | struct dirent *de; | |
1128 | ||
1129 | #ifdef GIT_USE_ICONV | |
1130 | git_fs_path_iconv_t ic = GIT_PATH_ICONV_INIT; | |
1131 | #endif | |
1132 | ||
1133 | GIT_UNUSED(flags); | |
1134 | ||
1135 | if (git_fs_path_to_dir(path) < 0) | |
1136 | return -1; | |
1137 | ||
1138 | wd_len = git_str_len(path); | |
1139 | ||
1140 | if ((dir = opendir(path->ptr)) == NULL) { | |
1141 | git_error_set(GIT_ERROR_OS, "failed to open directory '%s'", path->ptr); | |
1142 | if (errno == ENOENT) | |
1143 | return GIT_ENOTFOUND; | |
1144 | ||
1145 | return -1; | |
1146 | } | |
1147 | ||
1148 | #ifdef GIT_USE_ICONV | |
1149 | if ((flags & GIT_FS_PATH_DIR_PRECOMPOSE_UNICODE) != 0) | |
1150 | (void)git_fs_path_iconv_init_precompose(&ic); | |
1151 | #endif | |
1152 | ||
1153 | while ((de = readdir(dir)) != NULL) { | |
1154 | const char *de_path = de->d_name; | |
1155 | size_t de_len = strlen(de_path); | |
1156 | ||
1157 | if (git_fs_path_is_dot_or_dotdot(de_path)) | |
1158 | continue; | |
1159 | ||
1160 | #ifdef GIT_USE_ICONV | |
1161 | if ((error = git_fs_path_iconv(&ic, &de_path, &de_len)) < 0) | |
1162 | break; | |
1163 | #endif | |
1164 | ||
1165 | if ((error = git_str_put(path, de_path, de_len)) < 0) | |
1166 | break; | |
1167 | ||
1168 | git_error_clear(); | |
1169 | error = fn(arg, path); | |
1170 | ||
1171 | git_str_truncate(path, wd_len); /* restore path */ | |
1172 | ||
1173 | /* Only set our own error if the callback did not set one already */ | |
1174 | if (error != 0) { | |
1175 | if (!git_error_last()) | |
ad5611d8 | 1176 | ensure_error_set(error); |
e579e0f7 MB |
1177 | |
1178 | break; | |
1179 | } | |
1180 | } | |
1181 | ||
1182 | closedir(dir); | |
1183 | ||
1184 | #ifdef GIT_USE_ICONV | |
1185 | git_fs_path_iconv_clear(&ic); | |
1186 | #endif | |
1187 | ||
1188 | return error; | |
1189 | } | |
1190 | ||
1191 | #if defined(GIT_WIN32) && !defined(__MINGW32__) | |
1192 | ||
1193 | /* Using _FIND_FIRST_EX_LARGE_FETCH may increase performance in Windows 7 | |
1194 | * and better. | |
1195 | */ | |
1196 | #ifndef FIND_FIRST_EX_LARGE_FETCH | |
1197 | # define FIND_FIRST_EX_LARGE_FETCH 2 | |
1198 | #endif | |
1199 | ||
1200 | int git_fs_path_diriter_init( | |
1201 | git_fs_path_diriter *diriter, | |
1202 | const char *path, | |
1203 | unsigned int flags) | |
1204 | { | |
1205 | git_win32_path path_filter; | |
1206 | ||
1207 | static int is_win7_or_later = -1; | |
1208 | if (is_win7_or_later < 0) | |
1209 | is_win7_or_later = git_has_win32_version(6, 1, 0); | |
1210 | ||
1211 | GIT_ASSERT_ARG(diriter); | |
1212 | GIT_ASSERT_ARG(path); | |
1213 | ||
1214 | memset(diriter, 0, sizeof(git_fs_path_diriter)); | |
1215 | diriter->handle = INVALID_HANDLE_VALUE; | |
1216 | ||
1217 | if (git_str_puts(&diriter->path_utf8, path) < 0) | |
1218 | return -1; | |
1219 | ||
1220 | path_trim_slashes(&diriter->path_utf8); | |
1221 | ||
1222 | if (diriter->path_utf8.size == 0) { | |
1223 | git_error_set(GIT_ERROR_FILESYSTEM, "could not open directory '%s'", path); | |
1224 | return -1; | |
1225 | } | |
1226 | ||
1227 | if ((diriter->parent_len = git_win32_path_from_utf8(diriter->path, diriter->path_utf8.ptr)) < 0 || | |
1228 | !git_win32__findfirstfile_filter(path_filter, diriter->path_utf8.ptr)) { | |
1229 | git_error_set(GIT_ERROR_OS, "could not parse the directory path '%s'", path); | |
1230 | return -1; | |
1231 | } | |
1232 | ||
1233 | diriter->handle = FindFirstFileExW( | |
1234 | path_filter, | |
1235 | is_win7_or_later ? FindExInfoBasic : FindExInfoStandard, | |
1236 | &diriter->current, | |
1237 | FindExSearchNameMatch, | |
1238 | NULL, | |
1239 | is_win7_or_later ? FIND_FIRST_EX_LARGE_FETCH : 0); | |
1240 | ||
1241 | if (diriter->handle == INVALID_HANDLE_VALUE) { | |
1242 | git_error_set(GIT_ERROR_OS, "could not open directory '%s'", path); | |
1243 | return -1; | |
1244 | } | |
1245 | ||
1246 | diriter->parent_utf8_len = diriter->path_utf8.size; | |
1247 | diriter->flags = flags; | |
1248 | return 0; | |
1249 | } | |
1250 | ||
1251 | static int diriter_update_paths(git_fs_path_diriter *diriter) | |
1252 | { | |
1253 | size_t filename_len, path_len; | |
1254 | ||
1255 | filename_len = wcslen(diriter->current.cFileName); | |
1256 | ||
1257 | if (GIT_ADD_SIZET_OVERFLOW(&path_len, diriter->parent_len, filename_len) || | |
1258 | GIT_ADD_SIZET_OVERFLOW(&path_len, path_len, 2)) | |
1259 | return -1; | |
1260 | ||
1261 | if (path_len > GIT_WIN_PATH_UTF16) { | |
1262 | git_error_set(GIT_ERROR_FILESYSTEM, | |
1263 | "invalid path '%.*ls\\%ls' (path too long)", | |
1264 | diriter->parent_len, diriter->path, diriter->current.cFileName); | |
1265 | return -1; | |
1266 | } | |
1267 | ||
1268 | diriter->path[diriter->parent_len] = L'\\'; | |
1269 | memcpy(&diriter->path[diriter->parent_len+1], | |
1270 | diriter->current.cFileName, filename_len * sizeof(wchar_t)); | |
1271 | diriter->path[path_len-1] = L'\0'; | |
1272 | ||
1273 | git_str_truncate(&diriter->path_utf8, diriter->parent_utf8_len); | |
1274 | ||
1275 | if (diriter->parent_utf8_len > 0 && | |
1276 | diriter->path_utf8.ptr[diriter->parent_utf8_len-1] != '/') | |
1277 | git_str_putc(&diriter->path_utf8, '/'); | |
1278 | ||
1279 | git_str_put_w(&diriter->path_utf8, diriter->current.cFileName, filename_len); | |
1280 | ||
1281 | if (git_str_oom(&diriter->path_utf8)) | |
1282 | return -1; | |
1283 | ||
1284 | return 0; | |
1285 | } | |
1286 | ||
1287 | int git_fs_path_diriter_next(git_fs_path_diriter *diriter) | |
1288 | { | |
1289 | bool skip_dot = !(diriter->flags & GIT_FS_PATH_DIR_INCLUDE_DOT_AND_DOTDOT); | |
1290 | ||
1291 | do { | |
1292 | /* Our first time through, we already have the data from | |
1293 | * FindFirstFileW. Use it, otherwise get the next file. | |
1294 | */ | |
1295 | if (!diriter->needs_next) | |
1296 | diriter->needs_next = 1; | |
1297 | else if (!FindNextFileW(diriter->handle, &diriter->current)) | |
1298 | return GIT_ITEROVER; | |
1299 | } while (skip_dot && git_fs_path_is_dot_or_dotdotW(diriter->current.cFileName)); | |
1300 | ||
1301 | if (diriter_update_paths(diriter) < 0) | |
1302 | return -1; | |
1303 | ||
1304 | return 0; | |
1305 | } | |
1306 | ||
1307 | int git_fs_path_diriter_filename( | |
1308 | const char **out, | |
1309 | size_t *out_len, | |
1310 | git_fs_path_diriter *diriter) | |
1311 | { | |
1312 | GIT_ASSERT_ARG(out); | |
1313 | GIT_ASSERT_ARG(out_len); | |
1314 | GIT_ASSERT_ARG(diriter); | |
1315 | GIT_ASSERT(diriter->path_utf8.size > diriter->parent_utf8_len); | |
1316 | ||
1317 | *out = &diriter->path_utf8.ptr[diriter->parent_utf8_len+1]; | |
1318 | *out_len = diriter->path_utf8.size - diriter->parent_utf8_len - 1; | |
1319 | return 0; | |
1320 | } | |
1321 | ||
1322 | int git_fs_path_diriter_fullpath( | |
1323 | const char **out, | |
1324 | size_t *out_len, | |
1325 | git_fs_path_diriter *diriter) | |
1326 | { | |
1327 | GIT_ASSERT_ARG(out); | |
1328 | GIT_ASSERT_ARG(out_len); | |
1329 | GIT_ASSERT_ARG(diriter); | |
1330 | ||
1331 | *out = diriter->path_utf8.ptr; | |
1332 | *out_len = diriter->path_utf8.size; | |
1333 | return 0; | |
1334 | } | |
1335 | ||
1336 | int git_fs_path_diriter_stat(struct stat *out, git_fs_path_diriter *diriter) | |
1337 | { | |
1338 | GIT_ASSERT_ARG(out); | |
1339 | GIT_ASSERT_ARG(diriter); | |
1340 | ||
1341 | return git_win32__file_attribute_to_stat(out, | |
1342 | (WIN32_FILE_ATTRIBUTE_DATA *)&diriter->current, | |
1343 | diriter->path); | |
1344 | } | |
1345 | ||
1346 | void git_fs_path_diriter_free(git_fs_path_diriter *diriter) | |
1347 | { | |
1348 | if (diriter == NULL) | |
1349 | return; | |
1350 | ||
1351 | git_str_dispose(&diriter->path_utf8); | |
1352 | ||
1353 | if (diriter->handle != INVALID_HANDLE_VALUE) { | |
1354 | FindClose(diriter->handle); | |
1355 | diriter->handle = INVALID_HANDLE_VALUE; | |
1356 | } | |
1357 | } | |
1358 | ||
1359 | #else | |
1360 | ||
1361 | int git_fs_path_diriter_init( | |
1362 | git_fs_path_diriter *diriter, | |
1363 | const char *path, | |
1364 | unsigned int flags) | |
1365 | { | |
1366 | GIT_ASSERT_ARG(diriter); | |
1367 | GIT_ASSERT_ARG(path); | |
1368 | ||
1369 | memset(diriter, 0, sizeof(git_fs_path_diriter)); | |
1370 | ||
1371 | if (git_str_puts(&diriter->path, path) < 0) | |
1372 | return -1; | |
1373 | ||
1374 | path_trim_slashes(&diriter->path); | |
1375 | ||
1376 | if (diriter->path.size == 0) { | |
1377 | git_error_set(GIT_ERROR_FILESYSTEM, "could not open directory '%s'", path); | |
1378 | return -1; | |
1379 | } | |
1380 | ||
1381 | if ((diriter->dir = opendir(diriter->path.ptr)) == NULL) { | |
1382 | git_str_dispose(&diriter->path); | |
1383 | ||
1384 | git_error_set(GIT_ERROR_OS, "failed to open directory '%s'", path); | |
1385 | return -1; | |
1386 | } | |
1387 | ||
1388 | #ifdef GIT_USE_ICONV | |
1389 | if ((flags & GIT_FS_PATH_DIR_PRECOMPOSE_UNICODE) != 0) | |
1390 | (void)git_fs_path_iconv_init_precompose(&diriter->ic); | |
1391 | #endif | |
1392 | ||
1393 | diriter->parent_len = diriter->path.size; | |
1394 | diriter->flags = flags; | |
1395 | ||
1396 | return 0; | |
1397 | } | |
1398 | ||
1399 | int git_fs_path_diriter_next(git_fs_path_diriter *diriter) | |
1400 | { | |
1401 | struct dirent *de; | |
1402 | const char *filename; | |
1403 | size_t filename_len; | |
1404 | bool skip_dot = !(diriter->flags & GIT_FS_PATH_DIR_INCLUDE_DOT_AND_DOTDOT); | |
1405 | int error = 0; | |
1406 | ||
1407 | GIT_ASSERT_ARG(diriter); | |
1408 | ||
1409 | errno = 0; | |
1410 | ||
1411 | do { | |
1412 | if ((de = readdir(diriter->dir)) == NULL) { | |
1413 | if (!errno) | |
1414 | return GIT_ITEROVER; | |
1415 | ||
1416 | git_error_set(GIT_ERROR_OS, | |
1417 | "could not read directory '%s'", diriter->path.ptr); | |
1418 | return -1; | |
1419 | } | |
1420 | } while (skip_dot && git_fs_path_is_dot_or_dotdot(de->d_name)); | |
1421 | ||
1422 | filename = de->d_name; | |
1423 | filename_len = strlen(filename); | |
1424 | ||
1425 | #ifdef GIT_USE_ICONV | |
1426 | if ((diriter->flags & GIT_FS_PATH_DIR_PRECOMPOSE_UNICODE) != 0 && | |
1427 | (error = git_fs_path_iconv(&diriter->ic, &filename, &filename_len)) < 0) | |
1428 | return error; | |
1429 | #endif | |
1430 | ||
1431 | git_str_truncate(&diriter->path, diriter->parent_len); | |
1432 | ||
1433 | if (diriter->parent_len > 0 && | |
1434 | diriter->path.ptr[diriter->parent_len-1] != '/') | |
1435 | git_str_putc(&diriter->path, '/'); | |
1436 | ||
1437 | git_str_put(&diriter->path, filename, filename_len); | |
1438 | ||
1439 | if (git_str_oom(&diriter->path)) | |
1440 | return -1; | |
1441 | ||
1442 | return error; | |
1443 | } | |
1444 | ||
1445 | int git_fs_path_diriter_filename( | |
1446 | const char **out, | |
1447 | size_t *out_len, | |
1448 | git_fs_path_diriter *diriter) | |
1449 | { | |
1450 | GIT_ASSERT_ARG(out); | |
1451 | GIT_ASSERT_ARG(out_len); | |
1452 | GIT_ASSERT_ARG(diriter); | |
1453 | GIT_ASSERT(diriter->path.size > diriter->parent_len); | |
1454 | ||
1455 | *out = &diriter->path.ptr[diriter->parent_len+1]; | |
1456 | *out_len = diriter->path.size - diriter->parent_len - 1; | |
1457 | return 0; | |
1458 | } | |
1459 | ||
1460 | int git_fs_path_diriter_fullpath( | |
1461 | const char **out, | |
1462 | size_t *out_len, | |
1463 | git_fs_path_diriter *diriter) | |
1464 | { | |
1465 | GIT_ASSERT_ARG(out); | |
1466 | GIT_ASSERT_ARG(out_len); | |
1467 | GIT_ASSERT_ARG(diriter); | |
1468 | ||
1469 | *out = diriter->path.ptr; | |
1470 | *out_len = diriter->path.size; | |
1471 | return 0; | |
1472 | } | |
1473 | ||
1474 | int git_fs_path_diriter_stat(struct stat *out, git_fs_path_diriter *diriter) | |
1475 | { | |
1476 | GIT_ASSERT_ARG(out); | |
1477 | GIT_ASSERT_ARG(diriter); | |
1478 | ||
1479 | return git_fs_path_lstat(diriter->path.ptr, out); | |
1480 | } | |
1481 | ||
1482 | void git_fs_path_diriter_free(git_fs_path_diriter *diriter) | |
1483 | { | |
1484 | if (diriter == NULL) | |
1485 | return; | |
1486 | ||
1487 | if (diriter->dir) { | |
1488 | closedir(diriter->dir); | |
1489 | diriter->dir = NULL; | |
1490 | } | |
1491 | ||
1492 | #ifdef GIT_USE_ICONV | |
1493 | git_fs_path_iconv_clear(&diriter->ic); | |
1494 | #endif | |
1495 | ||
1496 | git_str_dispose(&diriter->path); | |
1497 | } | |
1498 | ||
1499 | #endif | |
1500 | ||
1501 | int git_fs_path_dirload( | |
1502 | git_vector *contents, | |
1503 | const char *path, | |
1504 | size_t prefix_len, | |
1505 | uint32_t flags) | |
1506 | { | |
1507 | git_fs_path_diriter iter = GIT_FS_PATH_DIRITER_INIT; | |
1508 | const char *name; | |
1509 | size_t name_len; | |
1510 | char *dup; | |
1511 | int error; | |
1512 | ||
1513 | GIT_ASSERT_ARG(contents); | |
1514 | GIT_ASSERT_ARG(path); | |
1515 | ||
1516 | if ((error = git_fs_path_diriter_init(&iter, path, flags)) < 0) | |
1517 | return error; | |
1518 | ||
1519 | while ((error = git_fs_path_diriter_next(&iter)) == 0) { | |
1520 | if ((error = git_fs_path_diriter_fullpath(&name, &name_len, &iter)) < 0) | |
1521 | break; | |
1522 | ||
1523 | GIT_ASSERT(name_len > prefix_len); | |
1524 | ||
1525 | dup = git__strndup(name + prefix_len, name_len - prefix_len); | |
1526 | GIT_ERROR_CHECK_ALLOC(dup); | |
1527 | ||
1528 | if ((error = git_vector_insert(contents, dup)) < 0) | |
1529 | break; | |
1530 | } | |
1531 | ||
1532 | if (error == GIT_ITEROVER) | |
1533 | error = 0; | |
1534 | ||
1535 | git_fs_path_diriter_free(&iter); | |
1536 | return error; | |
1537 | } | |
1538 | ||
1539 | int git_fs_path_from_url_or_path(git_str *local_path_out, const char *url_or_path) | |
1540 | { | |
1541 | if (git_fs_path_is_local_file_url(url_or_path)) | |
1542 | return git_fs_path_fromurl(local_path_out, url_or_path); | |
1543 | else | |
1544 | return git_str_sets(local_path_out, url_or_path); | |
1545 | } | |
1546 | ||
1547 | /* Reject paths like AUX or COM1, or those versions that end in a dot or | |
1548 | * colon. ("AUX." or "AUX:") | |
1549 | */ | |
1550 | GIT_INLINE(bool) validate_dospath( | |
1551 | const char *component, | |
1552 | size_t len, | |
1553 | const char dospath[3], | |
1554 | bool trailing_num) | |
1555 | { | |
1556 | size_t last = trailing_num ? 4 : 3; | |
1557 | ||
1558 | if (len < last || git__strncasecmp(component, dospath, 3) != 0) | |
1559 | return true; | |
1560 | ||
1561 | if (trailing_num && (component[3] < '1' || component[3] > '9')) | |
1562 | return true; | |
1563 | ||
1564 | return (len > last && | |
1565 | component[last] != '.' && | |
1566 | component[last] != ':'); | |
1567 | } | |
1568 | ||
1569 | GIT_INLINE(bool) validate_char(unsigned char c, unsigned int flags) | |
1570 | { | |
1571 | if ((flags & GIT_FS_PATH_REJECT_BACKSLASH) && c == '\\') | |
1572 | return false; | |
1573 | ||
1574 | if ((flags & GIT_FS_PATH_REJECT_SLASH) && c == '/') | |
1575 | return false; | |
1576 | ||
1577 | if (flags & GIT_FS_PATH_REJECT_NT_CHARS) { | |
1578 | if (c < 32) | |
1579 | return false; | |
1580 | ||
1581 | switch (c) { | |
1582 | case '<': | |
1583 | case '>': | |
1584 | case ':': | |
1585 | case '"': | |
1586 | case '|': | |
1587 | case '?': | |
1588 | case '*': | |
1589 | return false; | |
1590 | } | |
1591 | } | |
1592 | ||
1593 | return true; | |
1594 | } | |
1595 | ||
1596 | /* | |
1597 | * We fundamentally don't like some paths when dealing with user-inputted | |
1598 | * strings (to avoid escaping a sandbox): we don't want dot or dot-dot | |
1599 | * anywhere, we want to avoid writing weird paths on Windows that can't | |
1600 | * be handled by tools that use the non-\\?\ APIs, we don't want slashes | |
1601 | * or double slashes at the end of paths that can make them ambiguous. | |
1602 | * | |
1603 | * For checkout, we don't want to recurse into ".git" either. | |
1604 | */ | |
1605 | static bool validate_component( | |
1606 | const char *component, | |
1607 | size_t len, | |
1608 | unsigned int flags) | |
1609 | { | |
1610 | if (len == 0) | |
1611 | return !(flags & GIT_FS_PATH_REJECT_EMPTY_COMPONENT); | |
1612 | ||
1613 | if ((flags & GIT_FS_PATH_REJECT_TRAVERSAL) && | |
1614 | len == 1 && component[0] == '.') | |
1615 | return false; | |
1616 | ||
1617 | if ((flags & GIT_FS_PATH_REJECT_TRAVERSAL) && | |
1618 | len == 2 && component[0] == '.' && component[1] == '.') | |
1619 | return false; | |
1620 | ||
1621 | if ((flags & GIT_FS_PATH_REJECT_TRAILING_DOT) && | |
1622 | component[len - 1] == '.') | |
1623 | return false; | |
1624 | ||
1625 | if ((flags & GIT_FS_PATH_REJECT_TRAILING_SPACE) && | |
1626 | component[len - 1] == ' ') | |
1627 | return false; | |
1628 | ||
1629 | if ((flags & GIT_FS_PATH_REJECT_TRAILING_COLON) && | |
1630 | component[len - 1] == ':') | |
1631 | return false; | |
1632 | ||
1633 | if (flags & GIT_FS_PATH_REJECT_DOS_PATHS) { | |
1634 | if (!validate_dospath(component, len, "CON", false) || | |
1635 | !validate_dospath(component, len, "PRN", false) || | |
1636 | !validate_dospath(component, len, "AUX", false) || | |
1637 | !validate_dospath(component, len, "NUL", false) || | |
1638 | !validate_dospath(component, len, "COM", true) || | |
1639 | !validate_dospath(component, len, "LPT", true)) | |
1640 | return false; | |
1641 | } | |
1642 | ||
1643 | return true; | |
1644 | } | |
1645 | ||
1646 | #ifdef GIT_WIN32 | |
1647 | GIT_INLINE(bool) validate_length( | |
1648 | const char *path, | |
1649 | size_t len, | |
1650 | size_t utf8_char_len) | |
1651 | { | |
1652 | GIT_UNUSED(path); | |
1653 | GIT_UNUSED(len); | |
1654 | ||
1655 | return (utf8_char_len <= MAX_PATH); | |
1656 | } | |
1657 | #endif | |
1658 | ||
1659 | bool git_fs_path_str_is_valid_ext( | |
1660 | const git_str *path, | |
1661 | unsigned int flags, | |
1662 | bool (*validate_char_cb)(char ch, void *payload), | |
1663 | bool (*validate_component_cb)(const char *component, size_t len, void *payload), | |
1664 | bool (*validate_length_cb)(const char *path, size_t len, size_t utf8_char_len), | |
1665 | void *payload) | |
1666 | { | |
1667 | const char *start, *c; | |
1668 | size_t len = 0; | |
1669 | ||
1670 | if (!flags) | |
1671 | return true; | |
1672 | ||
1673 | for (start = c = path->ptr; *c && len < path->size; c++, len++) { | |
1674 | if (!validate_char(*c, flags)) | |
1675 | return false; | |
1676 | ||
1677 | if (validate_char_cb && !validate_char_cb(*c, payload)) | |
1678 | return false; | |
1679 | ||
1680 | if (*c != '/') | |
1681 | continue; | |
1682 | ||
1683 | if (!validate_component(start, (c - start), flags)) | |
1684 | return false; | |
1685 | ||
1686 | if (validate_component_cb && | |
1687 | !validate_component_cb(start, (c - start), payload)) | |
1688 | return false; | |
1689 | ||
1690 | start = c + 1; | |
1691 | } | |
1692 | ||
1693 | /* | |
1694 | * We want to support paths specified as either `const char *` | |
1695 | * or `git_str *`; we pass size as `SIZE_MAX` when we use a | |
1696 | * `const char *` to avoid a `strlen`. Ensure that we didn't | |
1697 | * have a NUL in the buffer if there was a non-SIZE_MAX length. | |
1698 | */ | |
1699 | if (path->size != SIZE_MAX && len != path->size) | |
1700 | return false; | |
1701 | ||
1702 | if (!validate_component(start, (c - start), flags)) | |
1703 | return false; | |
1704 | ||
1705 | if (validate_component_cb && | |
1706 | !validate_component_cb(start, (c - start), payload)) | |
1707 | return false; | |
1708 | ||
1709 | #ifdef GIT_WIN32 | |
1710 | if ((flags & GIT_FS_PATH_REJECT_LONG_PATHS) != 0) { | |
1711 | size_t utf8_len = git_utf8_char_length(path->ptr, len); | |
1712 | ||
1713 | if (!validate_length(path->ptr, len, utf8_len)) | |
1714 | return false; | |
1715 | ||
1716 | if (validate_length_cb && | |
1717 | !validate_length_cb(path->ptr, len, utf8_len)) | |
1718 | return false; | |
1719 | } | |
1720 | #else | |
1721 | GIT_UNUSED(validate_length_cb); | |
1722 | #endif | |
1723 | ||
1724 | return true; | |
1725 | } | |
1726 | ||
1727 | int git_fs_path_validate_str_length_with_suffix( | |
1728 | git_str *path, | |
1729 | size_t suffix_len) | |
1730 | { | |
1731 | #ifdef GIT_WIN32 | |
1732 | size_t utf8_len = git_utf8_char_length(path->ptr, path->size); | |
1733 | size_t total_len; | |
1734 | ||
1735 | if (GIT_ADD_SIZET_OVERFLOW(&total_len, utf8_len, suffix_len) || | |
1736 | total_len > MAX_PATH) { | |
1737 | ||
1738 | git_error_set(GIT_ERROR_FILESYSTEM, "path too long: '%.*s'", | |
1739 | (int)path->size, path->ptr); | |
1740 | return -1; | |
1741 | } | |
1742 | #else | |
1743 | GIT_UNUSED(path); | |
1744 | GIT_UNUSED(suffix_len); | |
1745 | #endif | |
1746 | ||
1747 | return 0; | |
1748 | } | |
1749 | ||
1750 | int git_fs_path_normalize_slashes(git_str *out, const char *path) | |
1751 | { | |
1752 | int error; | |
1753 | char *p; | |
1754 | ||
1755 | if ((error = git_str_puts(out, path)) < 0) | |
1756 | return error; | |
1757 | ||
1758 | for (p = out->ptr; *p; p++) { | |
1759 | if (*p == '\\') | |
1760 | *p = '/'; | |
1761 | } | |
1762 | ||
1763 | return 0; | |
1764 | } | |
1765 | ||
1766 | bool git_fs_path_supports_symlinks(const char *dir) | |
1767 | { | |
1768 | git_str path = GIT_STR_INIT; | |
1769 | bool supported = false; | |
1770 | struct stat st; | |
1771 | int fd; | |
1772 | ||
1773 | if ((fd = git_futils_mktmp(&path, dir, 0666)) < 0 || | |
1774 | p_close(fd) < 0 || | |
1775 | p_unlink(path.ptr) < 0 || | |
1776 | p_symlink("testing", path.ptr) < 0 || | |
1777 | p_lstat(path.ptr, &st) < 0) | |
1778 | goto done; | |
1779 | ||
1780 | supported = (S_ISLNK(st.st_mode) != 0); | |
1781 | done: | |
1782 | if (path.size) | |
1783 | (void)p_unlink(path.ptr); | |
1784 | git_str_dispose(&path); | |
1785 | return supported; | |
1786 | } | |
1787 | ||
ad5611d8 | 1788 | static git_fs_path_owner_t mock_owner = GIT_FS_PATH_OWNER_NONE; |
e579e0f7 | 1789 | |
ad5611d8 | 1790 | void git_fs_path__set_owner(git_fs_path_owner_t owner) |
e579e0f7 MB |
1791 | { |
1792 | mock_owner = owner; | |
1793 | } | |
1794 | ||
1795 | #ifdef GIT_WIN32 | |
1796 | static PSID *sid_dup(PSID sid) | |
1797 | { | |
1798 | DWORD len; | |
1799 | PSID dup; | |
1800 | ||
1801 | len = GetLengthSid(sid); | |
1802 | ||
1803 | if ((dup = git__malloc(len)) == NULL) | |
1804 | return NULL; | |
1805 | ||
1806 | if (!CopySid(len, dup, sid)) { | |
1807 | git_error_set(GIT_ERROR_OS, "could not duplicate sid"); | |
1808 | git__free(dup); | |
1809 | return NULL; | |
1810 | } | |
1811 | ||
1812 | return dup; | |
1813 | } | |
1814 | ||
1815 | static int current_user_sid(PSID *out) | |
1816 | { | |
1817 | TOKEN_USER *info = NULL; | |
1818 | HANDLE token = NULL; | |
1819 | DWORD len = 0; | |
1820 | int error = -1; | |
1821 | ||
1822 | if (!OpenProcessToken(GetCurrentProcess(), TOKEN_QUERY, &token)) { | |
1823 | git_error_set(GIT_ERROR_OS, "could not lookup process information"); | |
1824 | goto done; | |
1825 | } | |
1826 | ||
1827 | if (GetTokenInformation(token, TokenUser, NULL, 0, &len) || | |
1828 | GetLastError() != ERROR_INSUFFICIENT_BUFFER) { | |
1829 | git_error_set(GIT_ERROR_OS, "could not lookup token metadata"); | |
1830 | goto done; | |
1831 | } | |
1832 | ||
1833 | info = git__malloc(len); | |
1834 | GIT_ERROR_CHECK_ALLOC(info); | |
1835 | ||
1836 | if (!GetTokenInformation(token, TokenUser, info, len, &len)) { | |
1837 | git_error_set(GIT_ERROR_OS, "could not lookup current user"); | |
1838 | goto done; | |
1839 | } | |
1840 | ||
1841 | if ((*out = sid_dup(info->User.Sid))) | |
1842 | error = 0; | |
1843 | ||
1844 | done: | |
1845 | if (token) | |
1846 | CloseHandle(token); | |
1847 | ||
1848 | git__free(info); | |
1849 | return error; | |
1850 | } | |
1851 | ||
1852 | static int file_owner_sid(PSID *out, const char *path) | |
1853 | { | |
1854 | git_win32_path path_w32; | |
1855 | PSECURITY_DESCRIPTOR descriptor = NULL; | |
1856 | PSID owner_sid; | |
1857 | DWORD ret; | |
1858 | int error = -1; | |
1859 | ||
1860 | if (git_win32_path_from_utf8(path_w32, path) < 0) | |
1861 | return -1; | |
1862 | ||
1863 | ret = GetNamedSecurityInfoW(path_w32, SE_FILE_OBJECT, | |
1864 | OWNER_SECURITY_INFORMATION | DACL_SECURITY_INFORMATION, | |
1865 | &owner_sid, NULL, NULL, NULL, &descriptor); | |
1866 | ||
1867 | if (ret == ERROR_FILE_NOT_FOUND || ret == ERROR_PATH_NOT_FOUND) | |
1868 | error = GIT_ENOTFOUND; | |
1869 | else if (ret != ERROR_SUCCESS) | |
1870 | git_error_set(GIT_ERROR_OS, "failed to get security information"); | |
1871 | else if (!IsValidSid(owner_sid)) | |
1872 | git_error_set(GIT_ERROR_OS, "file owner is not valid"); | |
1873 | else if ((*out = sid_dup(owner_sid))) | |
1874 | error = 0; | |
1875 | ||
1876 | if (descriptor) | |
1877 | LocalFree(descriptor); | |
1878 | ||
1879 | return error; | |
1880 | } | |
1881 | ||
ad5611d8 TR |
1882 | int git_fs_path_owner_is( |
1883 | bool *out, | |
1884 | const char *path, | |
1885 | git_fs_path_owner_t owner_type) | |
e579e0f7 MB |
1886 | { |
1887 | PSID owner_sid = NULL, user_sid = NULL; | |
ad5611d8 TR |
1888 | BOOL is_admin, admin_owned; |
1889 | int error; | |
e579e0f7 MB |
1890 | |
1891 | if (mock_owner) { | |
ad5611d8 | 1892 | *out = ((mock_owner & owner_type) != 0); |
e579e0f7 MB |
1893 | return 0; |
1894 | } | |
1895 | ||
ad5611d8 | 1896 | if ((error = file_owner_sid(&owner_sid, path)) < 0) |
e579e0f7 MB |
1897 | goto done; |
1898 | ||
ad5611d8 TR |
1899 | if ((owner_type & GIT_FS_PATH_OWNER_CURRENT_USER) != 0) { |
1900 | if ((error = current_user_sid(&user_sid)) < 0) | |
1901 | goto done; | |
e579e0f7 | 1902 | |
ad5611d8 TR |
1903 | if (EqualSid(owner_sid, user_sid)) { |
1904 | *out = true; | |
1905 | goto done; | |
1906 | } | |
e579e0f7 MB |
1907 | } |
1908 | ||
ad5611d8 TR |
1909 | admin_owned = |
1910 | IsWellKnownSid(owner_sid, WinBuiltinAdministratorsSid) || | |
1911 | IsWellKnownSid(owner_sid, WinLocalSystemSid); | |
e579e0f7 | 1912 | |
ad5611d8 TR |
1913 | if (admin_owned && |
1914 | (owner_type & GIT_FS_PATH_OWNER_ADMINISTRATOR) != 0) { | |
1915 | *out = true; | |
e579e0f7 MB |
1916 | goto done; |
1917 | } | |
1918 | ||
ad5611d8 TR |
1919 | if (admin_owned && |
1920 | (owner_type & GIT_FS_PATH_USER_IS_ADMINISTRATOR) != 0 && | |
1921 | CheckTokenMembership(NULL, owner_sid, &is_admin) && | |
1922 | is_admin) { | |
1923 | *out = true; | |
e579e0f7 | 1924 | goto done; |
ad5611d8 | 1925 | } |
e579e0f7 | 1926 | |
ad5611d8 | 1927 | *out = false; |
e579e0f7 MB |
1928 | |
1929 | done: | |
1930 | git__free(owner_sid); | |
1931 | git__free(user_sid); | |
1932 | return error; | |
1933 | } | |
1934 | ||
1935 | #else | |
1936 | ||
ad5611d8 TR |
1937 | static int sudo_uid_lookup(uid_t *out) |
1938 | { | |
1939 | git_str uid_str = GIT_STR_INIT; | |
1940 | int64_t uid; | |
1941 | int error; | |
1942 | ||
1943 | if ((error = git__getenv(&uid_str, "SUDO_UID")) == 0 && | |
1944 | (error = git__strntol64(&uid, uid_str.ptr, uid_str.size, NULL, 10)) == 0 && | |
1945 | uid == (int64_t)((uid_t)uid)) { | |
1946 | *out = (uid_t)uid; | |
1947 | } | |
1948 | ||
1949 | git_str_dispose(&uid_str); | |
1950 | return error; | |
1951 | } | |
1952 | ||
1953 | int git_fs_path_owner_is( | |
1954 | bool *out, | |
1955 | const char *path, | |
1956 | git_fs_path_owner_t owner_type) | |
e579e0f7 MB |
1957 | { |
1958 | struct stat st; | |
ad5611d8 | 1959 | uid_t euid, sudo_uid; |
e579e0f7 | 1960 | |
ad5611d8 TR |
1961 | if (mock_owner) { |
1962 | *out = ((mock_owner & owner_type) != 0); | |
1963 | return 0; | |
1964 | } | |
1965 | ||
1966 | euid = geteuid(); | |
e579e0f7 MB |
1967 | |
1968 | if (p_lstat(path, &st) != 0) { | |
1969 | if (errno == ENOENT) | |
1970 | return GIT_ENOTFOUND; | |
1971 | ||
1972 | git_error_set(GIT_ERROR_OS, "could not stat '%s'", path); | |
1973 | return -1; | |
1974 | } | |
1975 | ||
ad5611d8 TR |
1976 | if ((owner_type & GIT_FS_PATH_OWNER_CURRENT_USER) != 0 && |
1977 | st.st_uid == euid) { | |
1978 | *out = true; | |
1979 | return 0; | |
e579e0f7 MB |
1980 | } |
1981 | ||
ad5611d8 TR |
1982 | if ((owner_type & GIT_FS_PATH_OWNER_ADMINISTRATOR) != 0 && |
1983 | st.st_uid == 0) { | |
1984 | *out = true; | |
e579e0f7 MB |
1985 | return 0; |
1986 | } | |
1987 | ||
ad5611d8 TR |
1988 | if ((owner_type & GIT_FS_PATH_OWNER_RUNNING_SUDO) != 0 && |
1989 | euid == 0 && | |
1990 | sudo_uid_lookup(&sudo_uid) == 0 && | |
1991 | st.st_uid == sudo_uid) { | |
1992 | *out = true; | |
e579e0f7 MB |
1993 | return 0; |
1994 | } | |
1995 | ||
ad5611d8 TR |
1996 | *out = false; |
1997 | return 0; | |
e579e0f7 MB |
1998 | } |
1999 | ||
ad5611d8 | 2000 | #endif |
e579e0f7 | 2001 | |
ad5611d8 TR |
2002 | int git_fs_path_owner_is_current_user(bool *out, const char *path) |
2003 | { | |
2004 | return git_fs_path_owner_is(out, path, GIT_FS_PATH_OWNER_CURRENT_USER); | |
e579e0f7 MB |
2005 | } |
2006 | ||
ad5611d8 TR |
2007 | int git_fs_path_owner_is_system(bool *out, const char *path) |
2008 | { | |
2009 | return git_fs_path_owner_is(out, path, GIT_FS_PATH_OWNER_ADMINISTRATOR); | |
2010 | } | |
e579e0f7 MB |
2011 | |
2012 | int git_fs_path_find_executable(git_str *fullpath, const char *executable) | |
2013 | { | |
2014 | #ifdef GIT_WIN32 | |
2015 | git_win32_path fullpath_w, executable_w; | |
2016 | int error; | |
2017 | ||
2018 | if (git__utf8_to_16(executable_w, GIT_WIN_PATH_MAX, executable) < 0) | |
2019 | return -1; | |
2020 | ||
2021 | error = git_win32_path_find_executable(fullpath_w, executable_w); | |
2022 | ||
2023 | if (error == 0) | |
2024 | error = git_str_put_w(fullpath, fullpath_w, wcslen(fullpath_w)); | |
2025 | ||
2026 | return error; | |
2027 | #else | |
2028 | git_str path = GIT_STR_INIT; | |
2029 | const char *current_dir, *term; | |
2030 | bool found = false; | |
2031 | ||
2032 | if (git__getenv(&path, "PATH") < 0) | |
2033 | return -1; | |
2034 | ||
2035 | current_dir = path.ptr; | |
2036 | ||
2037 | while (*current_dir) { | |
2038 | if (! (term = strchr(current_dir, GIT_PATH_LIST_SEPARATOR))) | |
2039 | term = strchr(current_dir, '\0'); | |
2040 | ||
2041 | git_str_clear(fullpath); | |
2042 | if (git_str_put(fullpath, current_dir, (term - current_dir)) < 0 || | |
2043 | git_str_putc(fullpath, '/') < 0 || | |
2044 | git_str_puts(fullpath, executable) < 0) | |
2045 | return -1; | |
2046 | ||
2047 | if (git_fs_path_isfile(fullpath->ptr)) { | |
2048 | found = true; | |
2049 | break; | |
2050 | } | |
2051 | ||
2052 | current_dir = term; | |
2053 | ||
2054 | while (*current_dir == GIT_PATH_LIST_SEPARATOR) | |
2055 | current_dir++; | |
2056 | } | |
2057 | ||
2058 | git_str_dispose(&path); | |
2059 | ||
2060 | if (found) | |
2061 | return 0; | |
2062 | ||
2063 | git_str_clear(fullpath); | |
2064 | return GIT_ENOTFOUND; | |
2065 | #endif | |
2066 | } |