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Commit | Line | Data |
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bb742ede | 1 | /* |
359fc2d2 | 2 | * Copyright (C) the libgit2 contributors. All rights reserved. |
bb742ede VM |
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 | */ | |
eae0bfdc | 7 | |
22a2d3d5 | 8 | #include "futils.h" |
eae0bfdc | 9 | |
c25aa7cd | 10 | #include "runtime.h" |
500ec543 | 11 | #include "strmap.h" |
c25aa7cd | 12 | #include "hash.h" |
e579e0f7 MB |
13 | #include "rand.h" |
14 | ||
2e29957a | 15 | #include <ctype.h> |
997579be SS |
16 | #if GIT_WIN32 |
17 | #include "win32/findfile.h" | |
18 | #endif | |
ec250c6e | 19 | |
e579e0f7 MB |
20 | #define GIT_FILEMODE_DEFAULT 0100666 |
21 | ||
ce8cd006 | 22 | int git_futils_mkpath2file(const char *file_path, const mode_t mode) |
55ffebe3 | 23 | { |
ca1b6e54 | 24 | return git_futils_mkdir( |
ac2fba0e | 25 | file_path, mode, |
331e7de9 | 26 | GIT_MKDIR_PATH | GIT_MKDIR_SKIP_LAST | GIT_MKDIR_VERIFY_DIR); |
55ffebe3 VM |
27 | } |
28 | ||
e579e0f7 | 29 | int git_futils_mktmp(git_str *path_out, const char *filename, mode_t mode) |
72a3fe42 | 30 | { |
e579e0f7 MB |
31 | const int open_flags = O_RDWR | O_CREAT | O_EXCL | O_BINARY | O_CLOEXEC; |
32 | unsigned int tries = 32; | |
72a3fe42 VM |
33 | int fd; |
34 | ||
e579e0f7 MB |
35 | while (tries--) { |
36 | uint64_t rand = git_rand_next(); | |
97769280 | 37 | |
e579e0f7 MB |
38 | git_str_sets(path_out, filename); |
39 | git_str_puts(path_out, "_git2_"); | |
40 | git_str_encode_hexstr(path_out, (void *)&rand, sizeof(uint64_t)); | |
72a3fe42 | 41 | |
e579e0f7 MB |
42 | if (git_str_oom(path_out)) |
43 | return -1; | |
72a3fe42 | 44 | |
e579e0f7 MB |
45 | /* Note that we open with O_CREAT | O_EXCL */ |
46 | if ((fd = p_open(path_out->ptr, open_flags, mode)) >= 0) | |
47 | return fd; | |
1d3a8aeb ET |
48 | } |
49 | ||
e579e0f7 MB |
50 | git_error_set(GIT_ERROR_OS, |
51 | "failed to create temporary file '%s'", path_out->ptr); | |
52 | git_str_dispose(path_out); | |
53 | return -1; | |
72a3fe42 VM |
54 | } |
55 | ||
ce8cd006 | 56 | int git_futils_creat_withpath(const char *path, const mode_t dirmode, const mode_t mode) |
7dd8a9f7 | 57 | { |
1a481123 | 58 | int fd; |
55ffebe3 | 59 | |
1a481123 VM |
60 | if (git_futils_mkpath2file(path, dirmode) < 0) |
61 | return -1; | |
62 | ||
63 | fd = p_creat(path, mode); | |
64 | if (fd < 0) { | |
ac3d33df | 65 | git_error_set(GIT_ERROR_OS, "failed to create file '%s'", path); |
1a481123 VM |
66 | return -1; |
67 | } | |
68 | ||
69 | return fd; | |
55ffebe3 VM |
70 | } |
71 | ||
33127043 | 72 | int git_futils_creat_locked(const char *path, const mode_t mode) |
1549cba9 | 73 | { |
4a26915d ET |
74 | int fd = p_open(path, O_WRONLY | O_CREAT | O_EXCL | O_BINARY | O_CLOEXEC, |
75 | mode); | |
09719c50 | 76 | |
1a481123 | 77 | if (fd < 0) { |
f94825c1 | 78 | int error = errno; |
ac3d33df | 79 | git_error_set(GIT_ERROR_OS, "failed to create locked file '%s'", path); |
f94825c1 CMN |
80 | switch (error) { |
81 | case EEXIST: | |
82 | return GIT_ELOCKED; | |
83 | case ENOENT: | |
84 | return GIT_ENOTFOUND; | |
85 | default: | |
86 | return -1; | |
87 | } | |
1a481123 VM |
88 | } |
89 | ||
90 | return fd; | |
1549cba9 RG |
91 | } |
92 | ||
ce8cd006 | 93 | int git_futils_creat_locked_withpath(const char *path, const mode_t dirmode, const mode_t mode) |
1549cba9 | 94 | { |
1a481123 VM |
95 | if (git_futils_mkpath2file(path, dirmode) < 0) |
96 | return -1; | |
1549cba9 | 97 | |
f79026b4 | 98 | return git_futils_creat_locked(path, mode); |
ec250c6e AE |
99 | } |
100 | ||
deafee7b RB |
101 | int git_futils_open_ro(const char *path) |
102 | { | |
103 | int fd = p_open(path, O_RDONLY); | |
14997dc5 | 104 | if (fd < 0) |
e579e0f7 | 105 | return git_fs_path_set_error(errno, path, "open"); |
deafee7b RB |
106 | return fd; |
107 | } | |
108 | ||
eae0bfdc PP |
109 | int git_futils_truncate(const char *path, int mode) |
110 | { | |
111 | int fd = p_open(path, O_WRONLY | O_CREAT | O_TRUNC | O_CLOEXEC, mode); | |
112 | if (fd < 0) | |
e579e0f7 | 113 | return git_fs_path_set_error(errno, path, "open"); |
eae0bfdc PP |
114 | |
115 | close(fd); | |
116 | return 0; | |
117 | } | |
118 | ||
22a2d3d5 | 119 | int git_futils_filesize(uint64_t *out, git_file fd) |
ec250c6e | 120 | { |
7dd8a9f7 | 121 | struct stat sb; |
deafee7b RB |
122 | |
123 | if (p_fstat(fd, &sb)) { | |
ac3d33df | 124 | git_error_set(GIT_ERROR_OS, "failed to stat file descriptor"); |
deafee7b RB |
125 | return -1; |
126 | } | |
5ad739e8 | 127 | |
22a2d3d5 UG |
128 | if (sb.st_size < 0) { |
129 | git_error_set(GIT_ERROR_INVALID, "invalid file size"); | |
130 | return -1; | |
131 | } | |
132 | ||
133 | *out = sb.st_size; | |
134 | return 0; | |
ec250c6e | 135 | } |
4188d28f | 136 | |
b6c93aef RB |
137 | mode_t git_futils_canonical_mode(mode_t raw_mode) |
138 | { | |
139 | if (S_ISREG(raw_mode)) | |
f240acce | 140 | return S_IFREG | GIT_PERMS_CANONICAL(raw_mode); |
b6c93aef RB |
141 | else if (S_ISLNK(raw_mode)) |
142 | return S_IFLNK; | |
b6c93aef RB |
143 | else if (S_ISGITLINK(raw_mode)) |
144 | return S_IFGITLINK; | |
7c7ff7d1 RB |
145 | else if (S_ISDIR(raw_mode)) |
146 | return S_IFDIR; | |
b6c93aef RB |
147 | else |
148 | return 0; | |
149 | } | |
150 | ||
e579e0f7 | 151 | int git_futils_readbuffer_fd(git_str *buf, git_file fd, size_t len) |
60b9d3fc | 152 | { |
de590550 | 153 | ssize_t read_size = 0; |
f1453c59 | 154 | size_t alloc_len; |
60b9d3fc | 155 | |
e579e0f7 | 156 | git_str_clear(buf); |
60b9d3fc | 157 | |
8d534b47 | 158 | if (!git__is_ssizet(len)) { |
ac3d33df | 159 | git_error_set(GIT_ERROR_INVALID, "read too large"); |
8d534b47 ET |
160 | return -1; |
161 | } | |
162 | ||
ac3d33df | 163 | GIT_ERROR_CHECK_ALLOC_ADD(&alloc_len, len, 1); |
e579e0f7 | 164 | if (git_str_grow(buf, alloc_len) < 0) |
60b9d3fc RB |
165 | return -1; |
166 | ||
1f35e89d RB |
167 | /* p_read loops internally to read len bytes */ |
168 | read_size = p_read(fd, buf->ptr, len); | |
60b9d3fc | 169 | |
ad5611d8 | 170 | if (read_size < 0) { |
ac3d33df | 171 | git_error_set(GIT_ERROR_OS, "failed to read descriptor"); |
e579e0f7 | 172 | git_str_dispose(buf); |
1f35e89d | 173 | return -1; |
60b9d3fc RB |
174 | } |
175 | ||
ad5611d8 TR |
176 | if ((size_t)read_size != len) { |
177 | git_error_set(GIT_ERROR_FILESYSTEM, "could not read (expected %" PRIuZ " bytes, read %" PRIuZ ")", len, (size_t)read_size); | |
178 | git_str_dispose(buf); | |
179 | return -1; | |
180 | } | |
181 | ||
1f35e89d RB |
182 | buf->ptr[read_size] = '\0'; |
183 | buf->size = read_size; | |
184 | ||
60b9d3fc RB |
185 | return 0; |
186 | } | |
187 | ||
ad5611d8 TR |
188 | int git_futils_readbuffer_fd_full(git_str *buf, git_file fd) |
189 | { | |
190 | static size_t blocksize = 10240; | |
191 | size_t alloc_len = 0, total_size = 0; | |
192 | ssize_t read_size = 0; | |
193 | ||
194 | git_str_clear(buf); | |
195 | ||
196 | while (true) { | |
197 | GIT_ERROR_CHECK_ALLOC_ADD(&alloc_len, alloc_len, blocksize); | |
198 | ||
199 | if (git_str_grow(buf, alloc_len) < 0) | |
200 | return -1; | |
201 | ||
202 | /* p_read loops internally to read blocksize bytes */ | |
203 | read_size = p_read(fd, buf->ptr, blocksize); | |
204 | ||
205 | if (read_size < 0) { | |
206 | git_error_set(GIT_ERROR_OS, "failed to read descriptor"); | |
207 | git_str_dispose(buf); | |
208 | return -1; | |
209 | } | |
210 | ||
211 | total_size += read_size; | |
212 | ||
213 | if ((size_t)read_size < blocksize) { | |
214 | break; | |
215 | } | |
216 | } | |
217 | ||
218 | buf->ptr[total_size] = '\0'; | |
219 | buf->size = total_size; | |
220 | ||
221 | return 0; | |
222 | } | |
223 | ||
60b9d3fc | 224 | int git_futils_readbuffer_updated( |
e579e0f7 MB |
225 | git_str *out, |
226 | const char *path, | |
227 | unsigned char checksum[GIT_HASH_SHA1_SIZE], | |
228 | int *updated) | |
75d58430 | 229 | { |
eb597799 | 230 | int error; |
75d58430 | 231 | git_file fd; |
c3da9f06 | 232 | struct stat st; |
e579e0f7 MB |
233 | git_str buf = GIT_STR_INIT; |
234 | unsigned char checksum_new[GIT_HASH_SHA1_SIZE]; | |
75d58430 | 235 | |
c25aa7cd PP |
236 | GIT_ASSERT_ARG(out); |
237 | GIT_ASSERT_ARG(path && *path); | |
75d58430 | 238 | |
c3da9f06 CMN |
239 | if (updated != NULL) |
240 | *updated = 0; | |
75d58430 | 241 | |
14997dc5 | 242 | if (p_stat(path, &st) < 0) |
e579e0f7 | 243 | return git_fs_path_set_error(errno, path, "stat"); |
c3da9f06 | 244 | |
7c9f5bec CMN |
245 | |
246 | if (S_ISDIR(st.st_mode)) { | |
ac3d33df | 247 | git_error_set(GIT_ERROR_INVALID, "requested file is a directory"); |
7c9f5bec CMN |
248 | return GIT_ENOTFOUND; |
249 | } | |
250 | ||
251 | if (!git__is_sizet(st.st_size+1)) { | |
ac3d33df | 252 | git_error_set(GIT_ERROR_OS, "invalid regular file stat for '%s'", path); |
1a481123 | 253 | return -1; |
13224ea4 | 254 | } |
c3da9f06 | 255 | |
9ccdb211 BR |
256 | if ((fd = git_futils_open_ro(path)) < 0) |
257 | return fd; | |
258 | ||
3547b122 | 259 | if (git_futils_readbuffer_fd(&buf, fd, (size_t)st.st_size) < 0) { |
e1de726c RB |
260 | p_close(fd); |
261 | return -1; | |
75d58430 RJ |
262 | } |
263 | ||
f79026b4 | 264 | p_close(fd); |
75d58430 | 265 | |
11c8e756 | 266 | if (checksum) { |
e579e0f7 MB |
267 | if ((error = git_hash_buf(checksum_new, buf.ptr, buf.size, GIT_HASH_ALGORITHM_SHA1)) < 0) { |
268 | git_str_dispose(&buf); | |
11c8e756 ET |
269 | return error; |
270 | } | |
eb597799 | 271 | |
11c8e756 ET |
272 | /* |
273 | * If we were given a checksum, we only want to use it if it's different | |
274 | */ | |
e579e0f7 MB |
275 | if (!memcmp(checksum, checksum_new, GIT_HASH_SHA1_SIZE)) { |
276 | git_str_dispose(&buf); | |
11c8e756 ET |
277 | if (updated) |
278 | *updated = 0; | |
eb597799 | 279 | |
11c8e756 ET |
280 | return 0; |
281 | } | |
282 | ||
e579e0f7 | 283 | memcpy(checksum, checksum_new, GIT_HASH_SHA1_SIZE); |
eb597799 CMN |
284 | } |
285 | ||
286 | /* | |
287 | * If we're here, the file did change, or the user didn't have an old version | |
288 | */ | |
c3da9f06 CMN |
289 | if (updated != NULL) |
290 | *updated = 1; | |
291 | ||
e579e0f7 MB |
292 | git_str_swap(out, &buf); |
293 | git_str_dispose(&buf); | |
3547b122 | 294 | |
13224ea4 | 295 | return 0; |
c3da9f06 CMN |
296 | } |
297 | ||
e579e0f7 | 298 | int git_futils_readbuffer(git_str *buf, const char *path) |
97769280 | 299 | { |
eb597799 | 300 | return git_futils_readbuffer_updated(buf, path, NULL, NULL); |
97769280 RB |
301 | } |
302 | ||
4742148d | 303 | int git_futils_writebuffer( |
e579e0f7 | 304 | const git_str *buf, const char *path, int flags, mode_t mode) |
4742148d | 305 | { |
5312621b | 306 | int fd, do_fsync = 0, error = 0; |
4742148d | 307 | |
5a747e0c | 308 | if (!flags) |
4742148d | 309 | flags = O_CREAT | O_TRUNC | O_WRONLY; |
5a747e0c | 310 | |
5312621b ET |
311 | if ((flags & O_FSYNC) != 0) |
312 | do_fsync = 1; | |
313 | ||
314 | flags &= ~O_FSYNC; | |
4742148d | 315 | |
4742148d | 316 | if (!mode) |
e579e0f7 | 317 | mode = GIT_FILEMODE_DEFAULT; |
4742148d RB |
318 | |
319 | if ((fd = p_open(path, flags, mode)) < 0) { | |
ac3d33df | 320 | git_error_set(GIT_ERROR_OS, "could not open '%s' for writing", path); |
4742148d RB |
321 | return fd; |
322 | } | |
323 | ||
e579e0f7 | 324 | if ((error = p_write(fd, git_str_cstr(buf), git_str_len(buf))) < 0) { |
ac3d33df | 325 | git_error_set(GIT_ERROR_OS, "could not write to '%s'", path); |
4742148d | 326 | (void)p_close(fd); |
f5254d78 | 327 | return error; |
4742148d RB |
328 | } |
329 | ||
5312621b | 330 | if (do_fsync && (error = p_fsync(fd)) < 0) { |
ac3d33df | 331 | git_error_set(GIT_ERROR_OS, "could not fsync '%s'", path); |
5312621b ET |
332 | p_close(fd); |
333 | return error; | |
334 | } | |
335 | ||
1229e1c4 | 336 | if ((error = p_close(fd)) < 0) { |
ac3d33df | 337 | git_error_set(GIT_ERROR_OS, "error while closing '%s'", path); |
1229e1c4 ET |
338 | return error; |
339 | } | |
340 | ||
341 | if (do_fsync && (flags & O_CREAT)) | |
342 | error = git_futils_fsync_parent(path); | |
4742148d RB |
343 | |
344 | return error; | |
345 | } | |
346 | ||
ce8cd006 | 347 | int git_futils_mv_withpath(const char *from, const char *to, const mode_t dirmode) |
19a30a3f | 348 | { |
deafee7b RB |
349 | if (git_futils_mkpath2file(to, dirmode) < 0) |
350 | return -1; | |
19a30a3f | 351 | |
deafee7b | 352 | if (p_rename(from, to) < 0) { |
ac3d33df | 353 | git_error_set(GIT_ERROR_OS, "failed to rename '%s' to '%s'", from, to); |
deafee7b RB |
354 | return -1; |
355 | } | |
356 | ||
357 | return 0; | |
19a30a3f VM |
358 | } |
359 | ||
22a2d3d5 | 360 | int git_futils_mmap_ro(git_map *out, git_file fd, off64_t begin, size_t len) |
20e7f426 | 361 | { |
f79026b4 | 362 | return p_mmap(out, len, GIT_PROT_READ, GIT_MAP_SHARED, fd, begin); |
20e7f426 SP |
363 | } |
364 | ||
74fa4bfa RB |
365 | int git_futils_mmap_ro_file(git_map *out, const char *path) |
366 | { | |
0d0fa7c3 | 367 | git_file fd = git_futils_open_ro(path); |
22a2d3d5 | 368 | uint64_t len; |
da9abdd6 | 369 | int result; |
0d0fa7c3 RB |
370 | |
371 | if (fd < 0) | |
372 | return fd; | |
373 | ||
22a2d3d5 | 374 | if ((result = git_futils_filesize(&len, fd)) < 0) |
38b6e700 | 375 | goto out; |
9daba9f4 | 376 | |
deafee7b | 377 | if (!git__is_sizet(len)) { |
ac3d33df | 378 | git_error_set(GIT_ERROR_OS, "file `%s` too large to mmap", path); |
38b6e700 PS |
379 | result = -1; |
380 | goto out; | |
deafee7b | 381 | } |
0d0fa7c3 | 382 | |
da9abdd6 | 383 | result = git_futils_mmap_ro(out, fd, 0, (size_t)len); |
38b6e700 | 384 | out: |
74fa4bfa RB |
385 | p_close(fd); |
386 | return result; | |
387 | } | |
388 | ||
f79026b4 | 389 | void git_futils_mmap_free(git_map *out) |
20e7f426 | 390 | { |
f79026b4 | 391 | p_munmap(out); |
20e7f426 SP |
392 | } |
393 | ||
81aaf370 ET |
394 | GIT_INLINE(int) mkdir_validate_dir( |
395 | const char *path, | |
e74340b0 ET |
396 | struct stat *st, |
397 | mode_t mode, | |
398 | uint32_t flags, | |
81aaf370 | 399 | struct git_futils_mkdir_options *opts) |
e74340b0 | 400 | { |
81aaf370 ET |
401 | /* with exclusive create, existing dir is an error */ |
402 | if ((flags & GIT_MKDIR_EXCL) != 0) { | |
ac3d33df | 403 | git_error_set(GIT_ERROR_FILESYSTEM, |
909d5494 | 404 | "failed to make directory '%s': directory exists", path); |
81aaf370 ET |
405 | return GIT_EEXISTS; |
406 | } | |
407 | ||
e74340b0 ET |
408 | if ((S_ISREG(st->st_mode) && (flags & GIT_MKDIR_REMOVE_FILES)) || |
409 | (S_ISLNK(st->st_mode) && (flags & GIT_MKDIR_REMOVE_SYMLINKS))) { | |
81aaf370 | 410 | if (p_unlink(path) < 0) { |
ac3d33df | 411 | git_error_set(GIT_ERROR_OS, "failed to remove %s '%s'", |
81aaf370 | 412 | S_ISLNK(st->st_mode) ? "symlink" : "file", path); |
e74340b0 ET |
413 | return GIT_EEXISTS; |
414 | } | |
415 | ||
81aaf370 | 416 | opts->perfdata.mkdir_calls++; |
e74340b0 | 417 | |
81aaf370 | 418 | if (p_mkdir(path, mode) < 0) { |
ac3d33df | 419 | git_error_set(GIT_ERROR_OS, "failed to make directory '%s'", path); |
e74340b0 ET |
420 | return GIT_EEXISTS; |
421 | } | |
422 | } | |
423 | ||
424 | else if (S_ISLNK(st->st_mode)) { | |
425 | /* Re-stat the target, make sure it's a directory */ | |
81aaf370 | 426 | opts->perfdata.stat_calls++; |
e74340b0 | 427 | |
81aaf370 | 428 | if (p_stat(path, st) < 0) { |
ac3d33df | 429 | git_error_set(GIT_ERROR_OS, "failed to make directory '%s'", path); |
e74340b0 ET |
430 | return GIT_EEXISTS; |
431 | } | |
432 | } | |
433 | ||
434 | else if (!S_ISDIR(st->st_mode)) { | |
ac3d33df | 435 | git_error_set(GIT_ERROR_FILESYSTEM, |
909d5494 | 436 | "failed to make directory '%s': directory exists", path); |
e74340b0 ET |
437 | return GIT_EEXISTS; |
438 | } | |
439 | ||
440 | return 0; | |
441 | } | |
442 | ||
81aaf370 ET |
443 | GIT_INLINE(int) mkdir_validate_mode( |
444 | const char *path, | |
445 | struct stat *st, | |
446 | bool terminal_path, | |
447 | mode_t mode, | |
448 | uint32_t flags, | |
449 | struct git_futils_mkdir_options *opts) | |
450 | { | |
451 | if (((terminal_path && (flags & GIT_MKDIR_CHMOD) != 0) || | |
452 | (flags & GIT_MKDIR_CHMOD_PATH) != 0) && st->st_mode != mode) { | |
453 | ||
454 | opts->perfdata.chmod_calls++; | |
455 | ||
456 | if (p_chmod(path, mode) < 0) { | |
ac3d33df | 457 | git_error_set(GIT_ERROR_OS, "failed to set permissions on '%s'", path); |
81aaf370 ET |
458 | return -1; |
459 | } | |
460 | } | |
461 | ||
462 | return 0; | |
463 | } | |
28cdb315 | 464 | |
e24c60db | 465 | GIT_INLINE(int) mkdir_canonicalize( |
e579e0f7 | 466 | git_str *path, |
e24c60db | 467 | uint32_t flags) |
1a5204a7 | 468 | { |
e24c60db | 469 | ssize_t root_len; |
ac2fba0e | 470 | |
e24c60db | 471 | if (path->size == 0) { |
ac3d33df | 472 | git_error_set(GIT_ERROR_OS, "attempt to create empty path"); |
ca1b6e54 | 473 | return -1; |
97769280 | 474 | } |
f0b2bfe5 | 475 | |
9cb5b0f7 | 476 | /* Trim trailing slashes (except the root) */ |
e579e0f7 | 477 | if ((root_len = git_fs_path_root(path->ptr)) < 0) |
9cb5b0f7 ET |
478 | root_len = 0; |
479 | else | |
480 | root_len++; | |
481 | ||
e24c60db ET |
482 | while (path->size > (size_t)root_len && path->ptr[path->size - 1] == '/') |
483 | path->ptr[--path->size] = '\0'; | |
412de9a6 | 484 | |
ca1b6e54 | 485 | /* if we are not supposed to made the last element, truncate it */ |
3c42e4ef | 486 | if ((flags & GIT_MKDIR_SKIP_LAST2) != 0) { |
e579e0f7 | 487 | git_fs_path_dirname_r(path, path->ptr); |
3c42e4ef RB |
488 | flags |= GIT_MKDIR_SKIP_LAST; |
489 | } | |
9cb5b0f7 | 490 | if ((flags & GIT_MKDIR_SKIP_LAST) != 0) { |
e579e0f7 | 491 | git_fs_path_dirname_r(path, path->ptr); |
9cb5b0f7 | 492 | } |
ca1b6e54 | 493 | |
9cb5b0f7 | 494 | /* We were either given the root path (or trimmed it to |
e24c60db ET |
495 | * the root), we don't have anything to do. |
496 | */ | |
497 | if (path->size <= (size_t)root_len) | |
e579e0f7 | 498 | git_str_clear(path); |
e24c60db ET |
499 | |
500 | return 0; | |
501 | } | |
502 | ||
503 | int git_futils_mkdir( | |
504 | const char *path, | |
505 | mode_t mode, | |
506 | uint32_t flags) | |
507 | { | |
e579e0f7 | 508 | git_str make_path = GIT_STR_INIT, parent_path = GIT_STR_INIT; |
e24c60db ET |
509 | const char *relative; |
510 | struct git_futils_mkdir_options opts = { 0 }; | |
511 | struct stat st; | |
512 | size_t depth = 0; | |
9ce2e7b3 | 513 | int len = 0, root_len, error; |
e24c60db | 514 | |
e579e0f7 | 515 | if ((error = git_str_puts(&make_path, path)) < 0 || |
e24c60db | 516 | (error = mkdir_canonicalize(&make_path, flags)) < 0 || |
e579e0f7 | 517 | (error = git_str_puts(&parent_path, make_path.ptr)) < 0 || |
e24c60db ET |
518 | make_path.size == 0) |
519 | goto done; | |
520 | ||
e579e0f7 | 521 | root_len = git_fs_path_root(make_path.ptr); |
9ce2e7b3 | 522 | |
e24c60db ET |
523 | /* find the first parent directory that exists. this will be used |
524 | * as the base to dirname_relative. | |
9cb5b0f7 | 525 | */ |
e24c60db ET |
526 | for (relative = make_path.ptr; parent_path.size; ) { |
527 | error = p_lstat(parent_path.ptr, &st); | |
528 | ||
529 | if (error == 0) { | |
530 | break; | |
531 | } else if (errno != ENOENT) { | |
ac3d33df | 532 | git_error_set(GIT_ERROR_OS, "failed to stat '%s'", parent_path.ptr); |
22a2d3d5 | 533 | error = -1; |
e24c60db ET |
534 | goto done; |
535 | } | |
536 | ||
537 | depth++; | |
538 | ||
539 | /* examine the parent of the current path */ | |
e579e0f7 | 540 | if ((len = git_fs_path_dirname_r(&parent_path, parent_path.ptr)) < 0) { |
e24c60db ET |
541 | error = len; |
542 | goto done; | |
543 | } | |
544 | ||
c25aa7cd | 545 | GIT_ASSERT(len); |
e24c60db | 546 | |
6147f643 PP |
547 | /* |
548 | * We've walked all the given path's parents and it's either relative | |
549 | * (the parent is simply '.') or rooted (the length is less than or | |
550 | * equal to length of the root path). The path may be less than the | |
551 | * root path length on Windows, where `C:` == `C:/`. | |
e24c60db | 552 | */ |
22a2d3d5 UG |
553 | if ((len == 1 && parent_path.ptr[0] == '.') || |
554 | (len == 1 && parent_path.ptr[0] == '/') || | |
555 | len <= root_len) { | |
e24c60db ET |
556 | relative = make_path.ptr; |
557 | break; | |
558 | } | |
559 | ||
560 | relative = make_path.ptr + len + 1; | |
561 | ||
562 | /* not recursive? just make this directory relative to its parent. */ | |
563 | if ((flags & GIT_MKDIR_PATH) == 0) | |
564 | break; | |
565 | } | |
566 | ||
567 | /* we found an item at the location we're trying to create, | |
568 | * validate it. | |
569 | */ | |
570 | if (depth == 0) { | |
81aaf370 | 571 | error = mkdir_validate_dir(make_path.ptr, &st, mode, flags, &opts); |
e24c60db | 572 | |
81aaf370 ET |
573 | if (!error) |
574 | error = mkdir_validate_mode( | |
575 | make_path.ptr, &st, true, mode, flags, &opts); | |
e24c60db | 576 | |
f7e56150 RB |
577 | goto done; |
578 | } | |
579 | ||
e24c60db ET |
580 | /* we already took `SKIP_LAST` and `SKIP_LAST2` into account when |
581 | * canonicalizing `make_path`. | |
582 | */ | |
583 | flags &= ~(GIT_MKDIR_SKIP_LAST2 | GIT_MKDIR_SKIP_LAST); | |
584 | ||
585 | error = git_futils_mkdir_relative(relative, | |
586 | parent_path.size ? parent_path.ptr : NULL, mode, flags, &opts); | |
587 | ||
588 | done: | |
e579e0f7 MB |
589 | git_str_dispose(&make_path); |
590 | git_str_dispose(&parent_path); | |
e24c60db ET |
591 | return error; |
592 | } | |
593 | ||
594 | int git_futils_mkdir_r(const char *path, const mode_t mode) | |
595 | { | |
596 | return git_futils_mkdir(path, mode, GIT_MKDIR_PATH); | |
597 | } | |
598 | ||
599 | int git_futils_mkdir_relative( | |
600 | const char *relative_path, | |
601 | const char *base, | |
602 | mode_t mode, | |
603 | uint32_t flags, | |
604 | struct git_futils_mkdir_options *opts) | |
605 | { | |
e579e0f7 | 606 | git_str make_path = GIT_STR_INIT; |
e24c60db ET |
607 | ssize_t root = 0, min_root_len; |
608 | char lastch = '/', *tail; | |
609 | struct stat st; | |
610 | struct git_futils_mkdir_options empty_opts = {0}; | |
611 | int error; | |
612 | ||
613 | if (!opts) | |
614 | opts = &empty_opts; | |
615 | ||
616 | /* build path and find "root" where we should start calling mkdir */ | |
e579e0f7 | 617 | if (git_fs_path_join_unrooted(&make_path, relative_path, base, &root) < 0) |
e24c60db ET |
618 | return -1; |
619 | ||
620 | if ((error = mkdir_canonicalize(&make_path, flags)) < 0 || | |
621 | make_path.size == 0) | |
622 | goto done; | |
623 | ||
ca1b6e54 RB |
624 | /* if we are not supposed to make the whole path, reset root */ |
625 | if ((flags & GIT_MKDIR_PATH) == 0) | |
e579e0f7 | 626 | root = git_str_rfind(&make_path, '/'); |
ca1b6e54 | 627 | |
f7e56150 | 628 | /* advance root past drive name or network mount prefix */ |
e579e0f7 | 629 | min_root_len = git_fs_path_root(make_path.ptr); |
f7e56150 RB |
630 | if (root < min_root_len) |
631 | root = min_root_len; | |
2da72fb2 | 632 | while (root >= 0 && make_path.ptr[root] == '/') |
f7e56150 RB |
633 | ++root; |
634 | ||
ca1b6e54 | 635 | /* clip root to make_path length */ |
f7e56150 RB |
636 | if (root > (ssize_t)make_path.size) |
637 | root = (ssize_t)make_path.size; /* i.e. NUL byte of string */ | |
0e26202c RB |
638 | if (root < 0) |
639 | root = 0; | |
ca1b6e54 | 640 | |
f7e56150 RB |
641 | /* walk down tail of path making each directory */ |
642 | for (tail = &make_path.ptr[root]; *tail; *tail = lastch) { | |
d88e6e9b | 643 | bool mkdir_attempted = false; |
999d4405 | 644 | |
ca1b6e54 RB |
645 | /* advance tail to include next path component */ |
646 | while (*tail == '/') | |
647 | tail++; | |
648 | while (*tail && *tail != '/') | |
649 | tail++; | |
650 | ||
651 | /* truncate path at next component */ | |
652 | lastch = *tail; | |
653 | *tail = '\0'; | |
999d4405 | 654 | st.st_mode = 0; |
ca1b6e54 | 655 | |
500ec543 ET |
656 | if (opts->dir_map && git_strmap_exists(opts->dir_map, make_path.ptr)) |
657 | continue; | |
658 | ||
fe598f09 | 659 | /* See what's going on with this path component */ |
500ec543 | 660 | opts->perfdata.stat_calls++; |
1d50b364 | 661 | |
d88e6e9b | 662 | retry_lstat: |
fe598f09 | 663 | if (p_lstat(make_path.ptr, &st) < 0) { |
d88e6e9b | 664 | if (mkdir_attempted || errno != ENOENT) { |
ac3d33df | 665 | git_error_set(GIT_ERROR_OS, "cannot access component in path '%s'", make_path.ptr); |
d88e6e9b | 666 | error = -1; |
fe598f09 ET |
667 | goto done; |
668 | } | |
669 | ||
ac3d33df | 670 | git_error_clear(); |
d88e6e9b VM |
671 | opts->perfdata.mkdir_calls++; |
672 | mkdir_attempted = true; | |
673 | if (p_mkdir(make_path.ptr, mode) < 0) { | |
674 | if (errno == EEXIST) | |
675 | goto retry_lstat; | |
ac3d33df | 676 | git_error_set(GIT_ERROR_OS, "failed to make directory '%s'", make_path.ptr); |
d88e6e9b VM |
677 | error = -1; |
678 | goto done; | |
679 | } | |
fe598f09 | 680 | } else { |
81aaf370 ET |
681 | if ((error = mkdir_validate_dir( |
682 | make_path.ptr, &st, mode, flags, opts)) < 0) | |
fe598f09 | 683 | goto done; |
d5f25204 | 684 | } |
40c44d2f | 685 | |
999d4405 | 686 | /* chmod if requested and necessary */ |
81aaf370 ET |
687 | if ((error = mkdir_validate_mode( |
688 | make_path.ptr, &st, (lastch == '\0'), mode, flags, opts)) < 0) | |
689 | goto done; | |
500ec543 ET |
690 | |
691 | if (opts->dir_map && opts->pool) { | |
f1453c59 ET |
692 | char *cache_path; |
693 | size_t alloc_size; | |
694 | ||
ac3d33df | 695 | GIT_ERROR_CHECK_ALLOC_ADD(&alloc_size, make_path.size, 1); |
22a2d3d5 | 696 | cache_path = git_pool_malloc(opts->pool, alloc_size); |
ac3d33df | 697 | GIT_ERROR_CHECK_ALLOC(cache_path); |
500ec543 ET |
698 | |
699 | memcpy(cache_path, make_path.ptr, make_path.size + 1); | |
700 | ||
22a2d3d5 | 701 | if ((error = git_strmap_set(opts->dir_map, cache_path, cache_path)) < 0) |
500ec543 ET |
702 | goto done; |
703 | } | |
a993e4fe | 704 | } |
40c44d2f | 705 | |
999d4405 RB |
706 | error = 0; |
707 | ||
708 | /* check that full path really is a directory if requested & needed */ | |
f7e56150 | 709 | if ((flags & GIT_MKDIR_VERIFY_DIR) != 0 && |
1d50b364 | 710 | lastch != '\0') { |
500ec543 | 711 | opts->perfdata.stat_calls++; |
1d50b364 ET |
712 | |
713 | if (p_stat(make_path.ptr, &st) < 0 || !S_ISDIR(st.st_mode)) { | |
ac3d33df | 714 | git_error_set(GIT_ERROR_OS, "path is not a directory '%s'", |
e74340b0 | 715 | make_path.ptr); |
1d50b364 ET |
716 | error = GIT_ENOTFOUND; |
717 | } | |
999d4405 | 718 | } |
77c3999c | 719 | |
999d4405 | 720 | done: |
e579e0f7 | 721 | git_str_dispose(&make_path); |
331e7de9 | 722 | return error; |
ca1b6e54 | 723 | } |
77c3999c | 724 | |
331e7de9 | 725 | typedef struct { |
ad9a921b | 726 | const char *base; |
7e5c8a5b | 727 | size_t baselen; |
331e7de9 | 728 | uint32_t flags; |
219d3457 | 729 | int depth; |
331e7de9 RB |
730 | } futils__rmdir_data; |
731 | ||
219d3457 RB |
732 | #define FUTILS_MAX_DEPTH 100 |
733 | ||
331e7de9 | 734 | static int futils__error_cannot_rmdir(const char *path, const char *filemsg) |
42b3a460 | 735 | { |
331e7de9 | 736 | if (filemsg) |
ac3d33df | 737 | git_error_set(GIT_ERROR_OS, "could not remove directory '%s': %s", |
331e7de9 RB |
738 | path, filemsg); |
739 | else | |
ac3d33df | 740 | git_error_set(GIT_ERROR_OS, "could not remove directory '%s'", path); |
555aa453 | 741 | |
331e7de9 RB |
742 | return -1; |
743 | } | |
deafee7b | 744 | |
e579e0f7 | 745 | static int futils__rm_first_parent(git_str *path, const char *ceiling) |
ad9a921b RB |
746 | { |
747 | int error = GIT_ENOTFOUND; | |
748 | struct stat st; | |
749 | ||
750 | while (error == GIT_ENOTFOUND) { | |
e579e0f7 | 751 | git_str_rtruncate_at_char(path, '/'); |
ad9a921b RB |
752 | |
753 | if (!path->size || git__prefixcmp(path->ptr, ceiling) != 0) | |
754 | error = 0; | |
cccacac5 | 755 | else if (p_lstat_posixly(path->ptr, &st) == 0) { |
ad9a921b RB |
756 | if (S_ISREG(st.st_mode) || S_ISLNK(st.st_mode)) |
757 | error = p_unlink(path->ptr); | |
758 | else if (!S_ISDIR(st.st_mode)) | |
759 | error = -1; /* fail to remove non-regular file */ | |
760 | } else if (errno != ENOTDIR) | |
761 | error = -1; | |
762 | } | |
763 | ||
764 | if (error) | |
765 | futils__error_cannot_rmdir(path->ptr, "cannot remove parent"); | |
766 | ||
767 | return error; | |
768 | } | |
769 | ||
e579e0f7 | 770 | static int futils__rmdir_recurs_foreach(void *opaque, git_str *path) |
331e7de9 | 771 | { |
96869a4e | 772 | int error = 0; |
331e7de9 | 773 | futils__rmdir_data *data = opaque; |
14997dc5 | 774 | struct stat st; |
555aa453 | 775 | |
14997dc5 RB |
776 | if (data->depth > FUTILS_MAX_DEPTH) |
777 | error = futils__error_cannot_rmdir( | |
778 | path->ptr, "directory nesting too deep"); | |
219d3457 | 779 | |
14997dc5 | 780 | else if ((error = p_lstat_posixly(path->ptr, &st)) < 0) { |
ad9a921b | 781 | if (errno == ENOENT) |
14997dc5 | 782 | error = 0; |
ad9a921b RB |
783 | else if (errno == ENOTDIR) { |
784 | /* asked to remove a/b/c/d/e and a/b is a normal file */ | |
785 | if ((data->flags & GIT_RMDIR_REMOVE_BLOCKERS) != 0) | |
14997dc5 | 786 | error = futils__rm_first_parent(path, data->base); |
ad9a921b RB |
787 | else |
788 | futils__error_cannot_rmdir( | |
789 | path->ptr, "parent is not directory"); | |
790 | } | |
791 | else | |
e579e0f7 | 792 | error = git_fs_path_set_error(errno, path->ptr, "rmdir"); |
ad9a921b RB |
793 | } |
794 | ||
795 | else if (S_ISDIR(st.st_mode)) { | |
219d3457 RB |
796 | data->depth++; |
797 | ||
e579e0f7 | 798 | error = git_fs_path_direach(path, 0, futils__rmdir_recurs_foreach, data); |
219d3457 RB |
799 | |
800 | data->depth--; | |
801 | ||
96869a4e | 802 | if (error < 0) |
25e0b157 | 803 | return error; |
96869a4e | 804 | |
219d3457 | 805 | if (data->depth == 0 && (data->flags & GIT_RMDIR_SKIP_ROOT) != 0) |
25e0b157 | 806 | return error; |
331e7de9 | 807 | |
14997dc5 | 808 | if ((error = p_rmdir(path->ptr)) < 0) { |
331e7de9 | 809 | if ((data->flags & GIT_RMDIR_SKIP_NONEMPTY) != 0 && |
e09d18ee | 810 | (errno == ENOTEMPTY || errno == EEXIST || errno == EBUSY)) |
14997dc5 | 811 | error = 0; |
331e7de9 | 812 | else |
e579e0f7 | 813 | error = git_fs_path_set_error(errno, path->ptr, "rmdir"); |
deafee7b | 814 | } |
858dba58 VM |
815 | } |
816 | ||
331e7de9 | 817 | else if ((data->flags & GIT_RMDIR_REMOVE_FILES) != 0) { |
14997dc5 | 818 | if (p_unlink(path->ptr) < 0) |
e579e0f7 | 819 | error = git_fs_path_set_error(errno, path->ptr, "remove"); |
deafee7b RB |
820 | } |
821 | ||
ad9a921b | 822 | else if ((data->flags & GIT_RMDIR_SKIP_NONEMPTY) == 0) |
14997dc5 | 823 | error = futils__error_cannot_rmdir(path->ptr, "still present"); |
555aa453 | 824 | |
25e0b157 | 825 | return error; |
331e7de9 RB |
826 | } |
827 | ||
bbb988a5 | 828 | static int futils__rmdir_empty_parent(void *opaque, const char *path) |
331e7de9 | 829 | { |
7e5c8a5b | 830 | futils__rmdir_data *data = opaque; |
96869a4e | 831 | int error = 0; |
7e5c8a5b | 832 | |
bbb988a5 | 833 | if (strlen(path) <= data->baselen) |
25e0b157 | 834 | error = GIT_ITEROVER; |
331e7de9 | 835 | |
bbb988a5 | 836 | else if (p_rmdir(path) < 0) { |
331e7de9 RB |
837 | int en = errno; |
838 | ||
839 | if (en == ENOENT || en == ENOTDIR) { | |
96869a4e | 840 | /* do nothing */ |
4a0df574 ET |
841 | } else if ((data->flags & GIT_RMDIR_SKIP_NONEMPTY) == 0 && |
842 | en == EBUSY) { | |
e579e0f7 | 843 | error = git_fs_path_set_error(errno, path, "rmdir"); |
e09d18ee | 844 | } else if (en == ENOTEMPTY || en == EEXIST || en == EBUSY) { |
331e7de9 RB |
845 | error = GIT_ITEROVER; |
846 | } else { | |
e579e0f7 | 847 | error = git_fs_path_set_error(errno, path, "rmdir"); |
331e7de9 RB |
848 | } |
849 | } | |
850 | ||
25e0b157 | 851 | return error; |
42b3a460 MS |
852 | } |
853 | ||
0d64bef9 | 854 | int git_futils_rmdir_r( |
331e7de9 | 855 | const char *path, const char *base, uint32_t flags) |
42b3a460 | 856 | { |
97769280 | 857 | int error; |
e579e0f7 | 858 | git_str fullpath = GIT_STR_INIT; |
96869a4e | 859 | futils__rmdir_data data; |
0d64bef9 RB |
860 | |
861 | /* build path and find "root" where we should start calling mkdir */ | |
e579e0f7 | 862 | if (git_fs_path_join_unrooted(&fullpath, path, base, NULL) < 0) |
0d64bef9 RB |
863 | return -1; |
864 | ||
96869a4e | 865 | memset(&data, 0, sizeof(data)); |
7e5c8a5b RB |
866 | data.base = base ? base : ""; |
867 | data.baselen = base ? strlen(base) : 0; | |
868 | data.flags = flags; | |
331e7de9 RB |
869 | |
870 | error = futils__rmdir_recurs_foreach(&data, &fullpath); | |
871 | ||
872 | /* remove now-empty parents if requested */ | |
96869a4e | 873 | if (!error && (flags & GIT_RMDIR_EMPTY_PARENTS) != 0) |
e579e0f7 | 874 | error = git_fs_path_walk_up( |
331e7de9 RB |
875 | &fullpath, base, futils__rmdir_empty_parent, &data); |
876 | ||
25e0b157 | 877 | if (error == GIT_ITEROVER) { |
ac3d33df | 878 | git_error_clear(); |
96869a4e | 879 | error = 0; |
25e0b157 | 880 | } |
0d64bef9 | 881 | |
e579e0f7 | 882 | git_str_dispose(&fullpath); |
97769280 | 883 | |
97769280 | 884 | return error; |
42b3a460 MS |
885 | } |
886 | ||
22a2d3d5 | 887 | int git_futils_fake_symlink(const char *target, const char *path) |
8651c10f BS |
888 | { |
889 | int retcode = GIT_ERROR; | |
22a2d3d5 | 890 | int fd = git_futils_creat_withpath(path, 0755, 0644); |
8651c10f | 891 | if (fd >= 0) { |
22a2d3d5 | 892 | retcode = p_write(fd, target, strlen(target)); |
8651c10f BS |
893 | p_close(fd); |
894 | } | |
895 | return retcode; | |
896 | } | |
ca1b6e54 | 897 | |
85bd1746 | 898 | static int cp_by_fd(int ifd, int ofd, bool close_fd_when_done) |
ca1b6e54 RB |
899 | { |
900 | int error = 0; | |
ad5611d8 | 901 | char buffer[GIT_BUFSIZE_FILEIO]; |
ca1b6e54 RB |
902 | ssize_t len = 0; |
903 | ||
904 | while (!error && (len = p_read(ifd, buffer, sizeof(buffer))) > 0) | |
905 | /* p_write() does not have the same semantics as write(). It loops | |
906 | * internally and will return 0 when it has completed writing. | |
907 | */ | |
908 | error = p_write(ofd, buffer, len); | |
909 | ||
910 | if (len < 0) { | |
ac3d33df | 911 | git_error_set(GIT_ERROR_OS, "read error while copying file"); |
ca1b6e54 RB |
912 | error = (int)len; |
913 | } | |
914 | ||
edef91ee | 915 | if (error < 0) |
ac3d33df | 916 | git_error_set(GIT_ERROR_OS, "write error while copying file"); |
edef91ee | 917 | |
85bd1746 | 918 | if (close_fd_when_done) { |
ca1b6e54 RB |
919 | p_close(ifd); |
920 | p_close(ofd); | |
921 | } | |
922 | ||
923 | return error; | |
924 | } | |
925 | ||
85bd1746 | 926 | int git_futils_cp(const char *from, const char *to, mode_t filemode) |
ca1b6e54 RB |
927 | { |
928 | int ifd, ofd; | |
929 | ||
ca1b6e54 RB |
930 | if ((ifd = git_futils_open_ro(from)) < 0) |
931 | return ifd; | |
932 | ||
933 | if ((ofd = p_open(to, O_WRONLY | O_CREAT | O_EXCL, filemode)) < 0) { | |
ca1b6e54 | 934 | p_close(ifd); |
e579e0f7 | 935 | return git_fs_path_set_error(errno, to, "open for writing"); |
ca1b6e54 RB |
936 | } |
937 | ||
85bd1746 | 938 | return cp_by_fd(ifd, ofd, true); |
ca1b6e54 RB |
939 | } |
940 | ||
27051d4e | 941 | int git_futils_touch(const char *path, time_t *when) |
8f09a98e ET |
942 | { |
943 | struct p_timeval times[2]; | |
8f09a98e ET |
944 | int ret; |
945 | ||
27051d4e ET |
946 | times[0].tv_sec = times[1].tv_sec = when ? *when : time(NULL); |
947 | times[0].tv_usec = times[1].tv_usec = 0; | |
8f09a98e ET |
948 | |
949 | ret = p_utimes(path, times); | |
950 | ||
e579e0f7 | 951 | return (ret < 0) ? git_fs_path_set_error(errno, path, "touch") : 0; |
8f09a98e ET |
952 | } |
953 | ||
85bd1746 | 954 | static int cp_link(const char *from, const char *to, size_t link_size) |
ca1b6e54 RB |
955 | { |
956 | int error = 0; | |
957 | ssize_t read_len; | |
392702ee | 958 | char *link_data; |
f1453c59 | 959 | size_t alloc_size; |
392702ee | 960 | |
ac3d33df | 961 | GIT_ERROR_CHECK_ALLOC_ADD(&alloc_size, link_size, 1); |
f1453c59 | 962 | link_data = git__malloc(alloc_size); |
ac3d33df | 963 | GIT_ERROR_CHECK_ALLOC(link_data); |
ca1b6e54 | 964 | |
85bd1746 RB |
965 | read_len = p_readlink(from, link_data, link_size); |
966 | if (read_len != (ssize_t)link_size) { | |
ac3d33df | 967 | git_error_set(GIT_ERROR_OS, "failed to read symlink data for '%s'", from); |
ca1b6e54 RB |
968 | error = -1; |
969 | } | |
970 | else { | |
971 | link_data[read_len] = '\0'; | |
972 | ||
973 | if (p_symlink(link_data, to) < 0) { | |
ac3d33df | 974 | git_error_set(GIT_ERROR_OS, "could not symlink '%s' as '%s'", |
ca1b6e54 RB |
975 | link_data, to); |
976 | error = -1; | |
977 | } | |
978 | } | |
979 | ||
980 | git__free(link_data); | |
981 | return error; | |
982 | } | |
983 | ||
984 | typedef struct { | |
985 | const char *to_root; | |
e579e0f7 | 986 | git_str to; |
ca1b6e54 RB |
987 | ssize_t from_prefix; |
988 | uint32_t flags; | |
989 | uint32_t mkdir_flags; | |
990 | mode_t dirmode; | |
991 | } cp_r_info; | |
992 | ||
3c42e4ef RB |
993 | #define GIT_CPDIR__MKDIR_DONE_FOR_TO_ROOT (1u << 10) |
994 | ||
e579e0f7 | 995 | static int _cp_r_mkdir(cp_r_info *info, git_str *from) |
3c42e4ef RB |
996 | { |
997 | int error = 0; | |
998 | ||
999 | /* create root directory the first time we need to create a directory */ | |
1000 | if ((info->flags & GIT_CPDIR__MKDIR_DONE_FOR_TO_ROOT) == 0) { | |
1001 | error = git_futils_mkdir( | |
ac2fba0e | 1002 | info->to_root, info->dirmode, |
18f08264 | 1003 | (info->flags & GIT_CPDIR_CHMOD_DIRS) ? GIT_MKDIR_CHMOD : 0); |
3c42e4ef RB |
1004 | |
1005 | info->flags |= GIT_CPDIR__MKDIR_DONE_FOR_TO_ROOT; | |
1006 | } | |
1007 | ||
1008 | /* create directory with root as base to prevent excess chmods */ | |
1009 | if (!error) | |
ac2fba0e | 1010 | error = git_futils_mkdir_relative( |
3c42e4ef | 1011 | from->ptr + info->from_prefix, info->to_root, |
ac2fba0e | 1012 | info->dirmode, info->mkdir_flags, NULL); |
3c42e4ef RB |
1013 | |
1014 | return error; | |
1015 | } | |
1016 | ||
e579e0f7 | 1017 | static int _cp_r_callback(void *ref, git_str *from) |
ca1b6e54 | 1018 | { |
3c42e4ef | 1019 | int error = 0; |
ca1b6e54 RB |
1020 | cp_r_info *info = ref; |
1021 | struct stat from_st, to_st; | |
1022 | bool exists = false; | |
1023 | ||
1024 | if ((info->flags & GIT_CPDIR_COPY_DOTFILES) == 0 && | |
e579e0f7 | 1025 | from->ptr[git_fs_path_basename_offset(from)] == '.') |
ca1b6e54 RB |
1026 | return 0; |
1027 | ||
e579e0f7 | 1028 | if ((error = git_str_joinpath( |
96869a4e | 1029 | &info->to, info->to_root, from->ptr + info->from_prefix)) < 0) |
25e0b157 | 1030 | return error; |
ca1b6e54 | 1031 | |
e579e0f7 | 1032 | if (!(error = git_fs_path_lstat(info->to.ptr, &to_st))) |
ca1b6e54 | 1033 | exists = true; |
14997dc5 | 1034 | else if (error != GIT_ENOTFOUND) |
25e0b157 | 1035 | return error; |
14997dc5 | 1036 | else { |
ac3d33df | 1037 | git_error_clear(); |
14997dc5 RB |
1038 | error = 0; |
1039 | } | |
ca1b6e54 | 1040 | |
e579e0f7 | 1041 | if ((error = git_fs_path_lstat(from->ptr, &from_st)) < 0) |
25e0b157 | 1042 | return error; |
ca1b6e54 RB |
1043 | |
1044 | if (S_ISDIR(from_st.st_mode)) { | |
ca1b6e54 RB |
1045 | mode_t oldmode = info->dirmode; |
1046 | ||
1047 | /* if we are not chmod'ing, then overwrite dirmode */ | |
18f08264 | 1048 | if ((info->flags & GIT_CPDIR_CHMOD_DIRS) == 0) |
ca1b6e54 RB |
1049 | info->dirmode = from_st.st_mode; |
1050 | ||
1051 | /* make directory now if CREATE_EMPTY_DIRS is requested and needed */ | |
1052 | if (!exists && (info->flags & GIT_CPDIR_CREATE_EMPTY_DIRS) != 0) | |
3c42e4ef | 1053 | error = _cp_r_mkdir(info, from); |
ca1b6e54 RB |
1054 | |
1055 | /* recurse onto target directory */ | |
25e0b157 | 1056 | if (!error && (!exists || S_ISDIR(to_st.st_mode))) |
e579e0f7 | 1057 | error = git_fs_path_direach(from, 0, _cp_r_callback, info); |
ca1b6e54 RB |
1058 | |
1059 | if (oldmode != 0) | |
1060 | info->dirmode = oldmode; | |
1061 | ||
25e0b157 | 1062 | return error; |
ca1b6e54 RB |
1063 | } |
1064 | ||
1065 | if (exists) { | |
1066 | if ((info->flags & GIT_CPDIR_OVERWRITE) == 0) | |
1067 | return 0; | |
1068 | ||
1069 | if (p_unlink(info->to.ptr) < 0) { | |
ac3d33df | 1070 | git_error_set(GIT_ERROR_OS, "cannot overwrite existing file '%s'", |
ca1b6e54 | 1071 | info->to.ptr); |
25e0b157 | 1072 | return GIT_EEXISTS; |
ca1b6e54 RB |
1073 | } |
1074 | } | |
1075 | ||
1076 | /* Done if this isn't a regular file or a symlink */ | |
1077 | if (!S_ISREG(from_st.st_mode) && | |
1078 | (!S_ISLNK(from_st.st_mode) || | |
1079 | (info->flags & GIT_CPDIR_COPY_SYMLINKS) == 0)) | |
1080 | return 0; | |
1081 | ||
1082 | /* Make container directory on demand if needed */ | |
1083 | if ((info->flags & GIT_CPDIR_CREATE_EMPTY_DIRS) == 0 && | |
3c42e4ef | 1084 | (error = _cp_r_mkdir(info, from)) < 0) |
25e0b157 | 1085 | return error; |
ca1b6e54 RB |
1086 | |
1087 | /* make symlink or regular file */ | |
94f742ba | 1088 | if (info->flags & GIT_CPDIR_LINK_FILES) { |
54738368 | 1089 | if ((error = p_link(from->ptr, info->to.ptr)) < 0) |
ac3d33df | 1090 | git_error_set(GIT_ERROR_OS, "failed to link '%s'", from->ptr); |
94f742ba | 1091 | } else if (S_ISLNK(from_st.st_mode)) { |
3c42e4ef | 1092 | error = cp_link(from->ptr, info->to.ptr, (size_t)from_st.st_size); |
94f742ba | 1093 | } else { |
3c42e4ef RB |
1094 | mode_t usemode = from_st.st_mode; |
1095 | ||
18f08264 | 1096 | if ((info->flags & GIT_CPDIR_SIMPLE_TO_MODE) != 0) |
f240acce | 1097 | usemode = GIT_PERMS_FOR_WRITE(usemode); |
3c42e4ef RB |
1098 | |
1099 | error = git_futils_cp(from->ptr, info->to.ptr, usemode); | |
3c42e4ef RB |
1100 | } |
1101 | ||
25e0b157 | 1102 | return error; |
ca1b6e54 RB |
1103 | } |
1104 | ||
1105 | int git_futils_cp_r( | |
1106 | const char *from, | |
1107 | const char *to, | |
1108 | uint32_t flags, | |
1109 | mode_t dirmode) | |
1110 | { | |
1111 | int error; | |
e579e0f7 | 1112 | git_str path = GIT_STR_INIT; |
ca1b6e54 RB |
1113 | cp_r_info info; |
1114 | ||
e579e0f7 | 1115 | if (git_str_joinpath(&path, from, "") < 0) /* ensure trailing slash */ |
ca1b6e54 RB |
1116 | return -1; |
1117 | ||
96869a4e | 1118 | memset(&info, 0, sizeof(info)); |
ca1b6e54 RB |
1119 | info.to_root = to; |
1120 | info.flags = flags; | |
1121 | info.dirmode = dirmode; | |
1122 | info.from_prefix = path.size; | |
e579e0f7 | 1123 | git_str_init(&info.to, 0); |
ca1b6e54 RB |
1124 | |
1125 | /* precalculate mkdir flags */ | |
1126 | if ((flags & GIT_CPDIR_CREATE_EMPTY_DIRS) == 0) { | |
3c42e4ef RB |
1127 | /* if not creating empty dirs, then use mkdir to create the path on |
1128 | * demand right before files are copied. | |
1129 | */ | |
ca1b6e54 | 1130 | info.mkdir_flags = GIT_MKDIR_PATH | GIT_MKDIR_SKIP_LAST; |
18f08264 | 1131 | if ((flags & GIT_CPDIR_CHMOD_DIRS) != 0) |
ca1b6e54 RB |
1132 | info.mkdir_flags |= GIT_MKDIR_CHMOD_PATH; |
1133 | } else { | |
3c42e4ef | 1134 | /* otherwise, we will do simple mkdir as directories are encountered */ |
ca1b6e54 | 1135 | info.mkdir_flags = |
18f08264 | 1136 | ((flags & GIT_CPDIR_CHMOD_DIRS) != 0) ? GIT_MKDIR_CHMOD : 0; |
ca1b6e54 RB |
1137 | } |
1138 | ||
1139 | error = _cp_r_callback(&info, &path); | |
1140 | ||
e579e0f7 MB |
1141 | git_str_dispose(&path); |
1142 | git_str_dispose(&info.to); | |
ca1b6e54 RB |
1143 | |
1144 | return error; | |
1145 | } | |
744cc03e | 1146 | |
c1f61af6 VM |
1147 | int git_futils_filestamp_check( |
1148 | git_futils_filestamp *stamp, const char *path) | |
744cc03e RB |
1149 | { |
1150 | struct stat st; | |
1151 | ||
c8b511f3 RB |
1152 | /* if the stamp is NULL, then always reload */ |
1153 | if (stamp == NULL) | |
744cc03e RB |
1154 | return 1; |
1155 | ||
7d490872 | 1156 | if (p_stat(path, &st) < 0) |
744cc03e RB |
1157 | return GIT_ENOTFOUND; |
1158 | ||
3d6a42d1 | 1159 | if (stamp->mtime.tv_sec == st.st_mtime && |
0226f7dd | 1160 | #if defined(GIT_USE_NSEC) |
3d6a42d1 | 1161 | stamp->mtime.tv_nsec == st.st_mtime_nsec && |
0226f7dd | 1162 | #endif |
22a2d3d5 | 1163 | stamp->size == (uint64_t)st.st_size && |
c8b511f3 | 1164 | stamp->ino == (unsigned int)st.st_ino) |
744cc03e RB |
1165 | return 0; |
1166 | ||
3d6a42d1 | 1167 | stamp->mtime.tv_sec = st.st_mtime; |
0226f7dd | 1168 | #if defined(GIT_USE_NSEC) |
3d6a42d1 | 1169 | stamp->mtime.tv_nsec = st.st_mtime_nsec; |
0226f7dd | 1170 | #endif |
22a2d3d5 | 1171 | stamp->size = (uint64_t)st.st_size; |
c8b511f3 | 1172 | stamp->ino = (unsigned int)st.st_ino; |
744cc03e RB |
1173 | |
1174 | return 1; | |
1175 | } | |
1176 | ||
c1f61af6 VM |
1177 | void git_futils_filestamp_set( |
1178 | git_futils_filestamp *target, const git_futils_filestamp *source) | |
c8b511f3 | 1179 | { |
c8b511f3 RB |
1180 | if (source) |
1181 | memcpy(target, source, sizeof(*target)); | |
1182 | else | |
1183 | memset(target, 0, sizeof(*target)); | |
1184 | } | |
823c0e9c RB |
1185 | |
1186 | ||
1187 | void git_futils_filestamp_set_from_stat( | |
1188 | git_futils_filestamp *stamp, struct stat *st) | |
1189 | { | |
1190 | if (st) { | |
3d6a42d1 ET |
1191 | stamp->mtime.tv_sec = st->st_mtime; |
1192 | #if defined(GIT_USE_NSEC) | |
1193 | stamp->mtime.tv_nsec = st->st_mtime_nsec; | |
1194 | #else | |
973a09a4 AR |
1195 | stamp->mtime.tv_nsec = 0; |
1196 | #endif | |
22a2d3d5 | 1197 | stamp->size = (uint64_t)st->st_size; |
823c0e9c RB |
1198 | stamp->ino = (unsigned int)st->st_ino; |
1199 | } else { | |
1200 | memset(stamp, 0, sizeof(*stamp)); | |
1201 | } | |
1202 | } | |
1229e1c4 ET |
1203 | |
1204 | int git_futils_fsync_dir(const char *path) | |
1205 | { | |
3ac05d11 ET |
1206 | #ifdef GIT_WIN32 |
1207 | GIT_UNUSED(path); | |
1208 | return 0; | |
1209 | #else | |
1229e1c4 ET |
1210 | int fd, error = -1; |
1211 | ||
1212 | if ((fd = p_open(path, O_RDONLY)) < 0) { | |
ac3d33df | 1213 | git_error_set(GIT_ERROR_OS, "failed to open directory '%s' for fsync", path); |
1229e1c4 ET |
1214 | return -1; |
1215 | } | |
1216 | ||
1217 | if ((error = p_fsync(fd)) < 0) | |
ac3d33df | 1218 | git_error_set(GIT_ERROR_OS, "failed to fsync directory '%s'", path); |
1229e1c4 ET |
1219 | |
1220 | p_close(fd); | |
1221 | return error; | |
3ac05d11 | 1222 | #endif |
1229e1c4 ET |
1223 | } |
1224 | ||
1225 | int git_futils_fsync_parent(const char *path) | |
1226 | { | |
0c28c72d PS |
1227 | char *parent; |
1228 | int error; | |
1229 | ||
e579e0f7 | 1230 | if ((parent = git_fs_path_dirname(path)) == NULL) |
0c28c72d | 1231 | return -1; |
1229e1c4 | 1232 | |
0c28c72d | 1233 | error = git_futils_fsync_dir(parent); |
1229e1c4 ET |
1234 | git__free(parent); |
1235 | return error; | |
1236 | } |