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Commit | Line | Data |
---|---|---|
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 | */ | |
5ee2fe77 | 7 | #include "common.h" |
ec250c6e | 8 | #include "fileops.h" |
2e29957a | 9 | #include <ctype.h> |
997579be SS |
10 | #if GIT_WIN32 |
11 | #include "win32/findfile.h" | |
12 | #endif | |
ec250c6e | 13 | |
ce8cd006 | 14 | int git_futils_mkpath2file(const char *file_path, const mode_t mode) |
55ffebe3 | 15 | { |
ca1b6e54 | 16 | return git_futils_mkdir( |
331e7de9 RB |
17 | file_path, NULL, mode, |
18 | GIT_MKDIR_PATH | GIT_MKDIR_SKIP_LAST | GIT_MKDIR_VERIFY_DIR); | |
55ffebe3 VM |
19 | } |
20 | ||
97769280 | 21 | int git_futils_mktmp(git_buf *path_out, const char *filename) |
72a3fe42 VM |
22 | { |
23 | int fd; | |
24 | ||
97769280 RB |
25 | git_buf_sets(path_out, filename); |
26 | git_buf_puts(path_out, "_git2_XXXXXX"); | |
27 | ||
28 | if (git_buf_oom(path_out)) | |
1a481123 | 29 | return -1; |
72a3fe42 | 30 | |
1a481123 VM |
31 | if ((fd = p_mkstemp(path_out->ptr)) < 0) { |
32 | giterr_set(GITERR_OS, | |
ae9e29fd | 33 | "Failed to create temporary file '%s'", path_out->ptr); |
1a481123 VM |
34 | return -1; |
35 | } | |
72a3fe42 | 36 | |
f978b748 | 37 | return fd; |
72a3fe42 VM |
38 | } |
39 | ||
ce8cd006 | 40 | int git_futils_creat_withpath(const char *path, const mode_t dirmode, const mode_t mode) |
7dd8a9f7 | 41 | { |
1a481123 | 42 | int fd; |
55ffebe3 | 43 | |
1a481123 VM |
44 | if (git_futils_mkpath2file(path, dirmode) < 0) |
45 | return -1; | |
46 | ||
47 | fd = p_creat(path, mode); | |
48 | if (fd < 0) { | |
ae9e29fd | 49 | giterr_set(GITERR_OS, "Failed to create file '%s'", path); |
1a481123 VM |
50 | return -1; |
51 | } | |
52 | ||
53 | return fd; | |
55ffebe3 VM |
54 | } |
55 | ||
33127043 | 56 | int git_futils_creat_locked(const char *path, const mode_t mode) |
1549cba9 | 57 | { |
09719c50 | 58 | int fd; |
59 | ||
60 | #ifdef GIT_WIN32 | |
6813169a | 61 | wchar_t buf[GIT_WIN_PATH]; |
09719c50 | 62 | |
0f4c6175 | 63 | git__utf8_to_16(buf, GIT_WIN_PATH, path); |
09719c50 | 64 | fd = _wopen(buf, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY | O_EXCL, mode); |
09719c50 | 65 | #else |
66 | fd = open(path, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY | O_EXCL, mode); | |
67 | #endif | |
68 | ||
1a481123 | 69 | if (fd < 0) { |
ae9e29fd | 70 | giterr_set(GITERR_OS, "Failed to create locked file '%s'", path); |
1a481123 VM |
71 | return -1; |
72 | } | |
73 | ||
74 | return fd; | |
1549cba9 RG |
75 | } |
76 | ||
ce8cd006 | 77 | int git_futils_creat_locked_withpath(const char *path, const mode_t dirmode, const mode_t mode) |
1549cba9 | 78 | { |
1a481123 VM |
79 | if (git_futils_mkpath2file(path, dirmode) < 0) |
80 | return -1; | |
1549cba9 | 81 | |
f79026b4 | 82 | return git_futils_creat_locked(path, mode); |
ec250c6e AE |
83 | } |
84 | ||
deafee7b RB |
85 | int git_futils_open_ro(const char *path) |
86 | { | |
87 | int fd = p_open(path, O_RDONLY); | |
88 | if (fd < 0) { | |
d0a920a6 | 89 | if (errno == ENOENT || errno == ENOTDIR) |
deafee7b RB |
90 | fd = GIT_ENOTFOUND; |
91 | giterr_set(GITERR_OS, "Failed to open '%s'", path); | |
92 | } | |
93 | return fd; | |
94 | } | |
95 | ||
f79026b4 | 96 | git_off_t git_futils_filesize(git_file fd) |
ec250c6e | 97 | { |
7dd8a9f7 | 98 | struct stat sb; |
deafee7b RB |
99 | |
100 | if (p_fstat(fd, &sb)) { | |
101 | giterr_set(GITERR_OS, "Failed to stat file descriptor"); | |
102 | return -1; | |
103 | } | |
5ad739e8 | 104 | |
ec250c6e AE |
105 | return sb.st_size; |
106 | } | |
4188d28f | 107 | |
b6c93aef RB |
108 | mode_t git_futils_canonical_mode(mode_t raw_mode) |
109 | { | |
110 | if (S_ISREG(raw_mode)) | |
111 | return S_IFREG | GIT_CANONICAL_PERMS(raw_mode); | |
112 | else if (S_ISLNK(raw_mode)) | |
113 | return S_IFLNK; | |
b6c93aef RB |
114 | else if (S_ISGITLINK(raw_mode)) |
115 | return S_IFGITLINK; | |
7c7ff7d1 RB |
116 | else if (S_ISDIR(raw_mode)) |
117 | return S_IFDIR; | |
b6c93aef RB |
118 | else |
119 | return 0; | |
120 | } | |
121 | ||
60b9d3fc RB |
122 | int git_futils_readbuffer_fd(git_buf *buf, git_file fd, size_t len) |
123 | { | |
de590550 | 124 | ssize_t read_size = 0; |
60b9d3fc RB |
125 | |
126 | git_buf_clear(buf); | |
127 | ||
128 | if (git_buf_grow(buf, len + 1) < 0) | |
129 | return -1; | |
130 | ||
1f35e89d RB |
131 | /* p_read loops internally to read len bytes */ |
132 | read_size = p_read(fd, buf->ptr, len); | |
60b9d3fc | 133 | |
c859184b | 134 | if (read_size != (ssize_t)len) { |
1f35e89d RB |
135 | giterr_set(GITERR_OS, "Failed to read descriptor"); |
136 | return -1; | |
60b9d3fc RB |
137 | } |
138 | ||
1f35e89d RB |
139 | buf->ptr[read_size] = '\0'; |
140 | buf->size = read_size; | |
141 | ||
60b9d3fc RB |
142 | return 0; |
143 | } | |
144 | ||
145 | int git_futils_readbuffer_updated( | |
744cc03e | 146 | git_buf *buf, const char *path, time_t *mtime, size_t *size, int *updated) |
75d58430 RJ |
147 | { |
148 | git_file fd; | |
c3da9f06 | 149 | struct stat st; |
744cc03e | 150 | bool changed = false; |
75d58430 | 151 | |
13224ea4 | 152 | assert(buf && path && *path); |
75d58430 | 153 | |
c3da9f06 CMN |
154 | if (updated != NULL) |
155 | *updated = 0; | |
75d58430 | 156 | |
ae9e29fd RB |
157 | if ((fd = git_futils_open_ro(path)) < 0) |
158 | return fd; | |
c3da9f06 | 159 | |
13224ea4 | 160 | if (p_fstat(fd, &st) < 0 || S_ISDIR(st.st_mode) || !git__is_sizet(st.st_size+1)) { |
e1de726c | 161 | p_close(fd); |
1a481123 VM |
162 | giterr_set(GITERR_OS, "Invalid regular file stat for '%s'", path); |
163 | return -1; | |
13224ea4 | 164 | } |
c3da9f06 CMN |
165 | |
166 | /* | |
744cc03e RB |
167 | * If we were given a time and/or a size, we only want to read the file |
168 | * if it has been modified. | |
c3da9f06 | 169 | */ |
744cc03e RB |
170 | if (size && *size != (size_t)st.st_size) |
171 | changed = true; | |
172 | if (mtime && *mtime != st.st_mtime) | |
173 | changed = true; | |
174 | if (!size && !mtime) | |
175 | changed = true; | |
176 | ||
177 | if (!changed) { | |
e1de726c | 178 | p_close(fd); |
13224ea4 VM |
179 | return 0; |
180 | } | |
c3da9f06 CMN |
181 | |
182 | if (mtime != NULL) | |
183 | *mtime = st.st_mtime; | |
744cc03e RB |
184 | if (size != NULL) |
185 | *size = (size_t)st.st_size; | |
c3da9f06 | 186 | |
60b9d3fc | 187 | if (git_futils_readbuffer_fd(buf, fd, (size_t)st.st_size) < 0) { |
e1de726c RB |
188 | p_close(fd); |
189 | return -1; | |
75d58430 RJ |
190 | } |
191 | ||
f79026b4 | 192 | p_close(fd); |
75d58430 | 193 | |
c3da9f06 CMN |
194 | if (updated != NULL) |
195 | *updated = 1; | |
196 | ||
13224ea4 | 197 | return 0; |
c3da9f06 CMN |
198 | } |
199 | ||
13224ea4 | 200 | int git_futils_readbuffer(git_buf *buf, const char *path) |
97769280 | 201 | { |
744cc03e | 202 | return git_futils_readbuffer_updated(buf, path, NULL, NULL, NULL); |
97769280 RB |
203 | } |
204 | ||
ce8cd006 | 205 | int git_futils_mv_withpath(const char *from, const char *to, const mode_t dirmode) |
19a30a3f | 206 | { |
deafee7b RB |
207 | if (git_futils_mkpath2file(to, dirmode) < 0) |
208 | return -1; | |
19a30a3f | 209 | |
deafee7b RB |
210 | if (p_rename(from, to) < 0) { |
211 | giterr_set(GITERR_OS, "Failed to rename '%s' to '%s'", from, to); | |
212 | return -1; | |
213 | } | |
214 | ||
215 | return 0; | |
19a30a3f VM |
216 | } |
217 | ||
f79026b4 | 218 | int git_futils_mmap_ro(git_map *out, git_file fd, git_off_t begin, size_t len) |
20e7f426 | 219 | { |
f79026b4 | 220 | return p_mmap(out, len, GIT_PROT_READ, GIT_MAP_SHARED, fd, begin); |
20e7f426 SP |
221 | } |
222 | ||
74fa4bfa RB |
223 | int git_futils_mmap_ro_file(git_map *out, const char *path) |
224 | { | |
0d0fa7c3 RB |
225 | git_file fd = git_futils_open_ro(path); |
226 | git_off_t len; | |
da9abdd6 | 227 | int result; |
0d0fa7c3 RB |
228 | |
229 | if (fd < 0) | |
230 | return fd; | |
231 | ||
232 | len = git_futils_filesize(fd); | |
deafee7b RB |
233 | if (!git__is_sizet(len)) { |
234 | giterr_set(GITERR_OS, "File `%s` too large to mmap", path); | |
235 | return -1; | |
236 | } | |
0d0fa7c3 | 237 | |
da9abdd6 | 238 | result = git_futils_mmap_ro(out, fd, 0, (size_t)len); |
74fa4bfa RB |
239 | p_close(fd); |
240 | return result; | |
241 | } | |
242 | ||
f79026b4 | 243 | void git_futils_mmap_free(git_map *out) |
20e7f426 | 244 | { |
f79026b4 | 245 | p_munmap(out); |
20e7f426 SP |
246 | } |
247 | ||
ca1b6e54 RB |
248 | int git_futils_mkdir( |
249 | const char *path, | |
250 | const char *base, | |
251 | mode_t mode, | |
252 | uint32_t flags) | |
1a5204a7 | 253 | { |
331e7de9 | 254 | int error = -1; |
97769280 | 255 | git_buf make_path = GIT_BUF_INIT; |
ca1b6e54 RB |
256 | ssize_t root = 0; |
257 | char lastch, *tail; | |
dc07184f | 258 | |
ca1b6e54 RB |
259 | /* build path and find "root" where we should start calling mkdir */ |
260 | if (git_path_join_unrooted(&make_path, path, base, &root) < 0) | |
261 | return -1; | |
dc07184f | 262 | |
ca1b6e54 RB |
263 | if (make_path.size == 0) { |
264 | giterr_set(GITERR_OS, "Attempt to create empty path"); | |
265 | goto fail; | |
97769280 | 266 | } |
f0b2bfe5 | 267 | |
ca1b6e54 RB |
268 | /* remove trailing slashes on path */ |
269 | while (make_path.ptr[make_path.size - 1] == '/') { | |
270 | make_path.size--; | |
271 | make_path.ptr[make_path.size] = '\0'; | |
272 | } | |
412de9a6 | 273 | |
ca1b6e54 RB |
274 | /* if we are not supposed to made the last element, truncate it */ |
275 | if ((flags & GIT_MKDIR_SKIP_LAST) != 0) | |
276 | git_buf_rtruncate_at_char(&make_path, '/'); | |
277 | ||
278 | /* if we are not supposed to make the whole path, reset root */ | |
279 | if ((flags & GIT_MKDIR_PATH) == 0) | |
280 | root = git_buf_rfind(&make_path, '/'); | |
281 | ||
282 | /* clip root to make_path length */ | |
283 | if (root >= (ssize_t)make_path.size) | |
284 | root = (ssize_t)make_path.size - 1; | |
0e26202c RB |
285 | if (root < 0) |
286 | root = 0; | |
ca1b6e54 RB |
287 | |
288 | tail = & make_path.ptr[root]; | |
289 | ||
290 | while (*tail) { | |
291 | /* advance tail to include next path component */ | |
292 | while (*tail == '/') | |
293 | tail++; | |
294 | while (*tail && *tail != '/') | |
295 | tail++; | |
296 | ||
297 | /* truncate path at next component */ | |
298 | lastch = *tail; | |
299 | *tail = '\0'; | |
300 | ||
301 | /* make directory */ | |
331e7de9 | 302 | if (p_mkdir(make_path.ptr, mode) < 0) { |
6c72035f PK |
303 | int already_exists = 0; |
304 | ||
305 | switch (errno) { | |
306 | case EEXIST: | |
307 | if (!lastch && (flags & GIT_MKDIR_VERIFY_DIR) != 0 && | |
308 | !git_path_isdir(make_path.ptr)) { | |
331e7de9 RB |
309 | giterr_set( |
310 | GITERR_OS, "Existing path is not a directory '%s'", | |
311 | make_path.ptr); | |
312 | error = GIT_ENOTFOUND; | |
313 | goto fail; | |
314 | } | |
6c72035f PK |
315 | |
316 | already_exists = 1; | |
317 | break; | |
318 | case ENOSYS: | |
319 | /* Solaris can generate this error if you try to mkdir | |
320 | * a path which is already a mount point. In that case, | |
321 | * the path does already exist; but it's not implied by | |
322 | * the definition of the error, so let's recheck */ | |
323 | if (git_path_isdir(make_path.ptr)) { | |
324 | already_exists = 1; | |
325 | break; | |
326 | } | |
327 | ||
328 | /* Fall through */ | |
329 | errno = ENOSYS; | |
330 | default: | |
331 | giterr_set(GITERR_OS, "Failed to make directory '%s'", | |
331e7de9 | 332 | make_path.ptr); |
331e7de9 | 333 | goto fail; |
6c72035f PK |
334 | } |
335 | ||
336 | if (already_exists && (flags & GIT_MKDIR_EXCL) != 0) { | |
337 | giterr_set(GITERR_OS, "Directory already exists '%s'", | |
331e7de9 | 338 | make_path.ptr); |
6c72035f | 339 | error = GIT_EEXISTS; |
331e7de9 RB |
340 | goto fail; |
341 | } | |
d5f25204 | 342 | } |
40c44d2f | 343 | |
ca1b6e54 RB |
344 | /* chmod if requested */ |
345 | if ((flags & GIT_MKDIR_CHMOD_PATH) != 0 || | |
346 | ((flags & GIT_MKDIR_CHMOD) != 0 && lastch == '\0')) | |
347 | { | |
348 | if (p_chmod(make_path.ptr, mode) < 0) { | |
349 | giterr_set(GITERR_OS, "Failed to set permissions on '%s'", | |
350 | make_path.ptr); | |
351 | goto fail; | |
352 | } | |
353 | } | |
f0b2bfe5 | 354 | |
ca1b6e54 | 355 | *tail = lastch; |
a993e4fe | 356 | } |
40c44d2f | 357 | |
97769280 | 358 | git_buf_free(&make_path); |
ca1b6e54 | 359 | return 0; |
77c3999c | 360 | |
ca1b6e54 RB |
361 | fail: |
362 | git_buf_free(&make_path); | |
331e7de9 | 363 | return error; |
ca1b6e54 | 364 | } |
77c3999c | 365 | |
ca1b6e54 RB |
366 | int git_futils_mkdir_r(const char *path, const char *base, const mode_t mode) |
367 | { | |
368 | return git_futils_mkdir(path, base, mode, GIT_MKDIR_PATH); | |
170d3f2f | 369 | } |
370 | ||
331e7de9 | 371 | typedef struct { |
ad9a921b | 372 | const char *base; |
7e5c8a5b | 373 | size_t baselen; |
331e7de9 RB |
374 | uint32_t flags; |
375 | int error; | |
376 | } futils__rmdir_data; | |
377 | ||
378 | static int futils__error_cannot_rmdir(const char *path, const char *filemsg) | |
42b3a460 | 379 | { |
331e7de9 RB |
380 | if (filemsg) |
381 | giterr_set(GITERR_OS, "Could not remove directory. File '%s' %s", | |
382 | path, filemsg); | |
383 | else | |
384 | giterr_set(GITERR_OS, "Could not remove directory '%s'", path); | |
555aa453 | 385 | |
331e7de9 RB |
386 | return -1; |
387 | } | |
deafee7b | 388 | |
ad9a921b RB |
389 | static int futils__rm_first_parent(git_buf *path, const char *ceiling) |
390 | { | |
391 | int error = GIT_ENOTFOUND; | |
392 | struct stat st; | |
393 | ||
394 | while (error == GIT_ENOTFOUND) { | |
395 | git_buf_rtruncate_at_char(path, '/'); | |
396 | ||
397 | if (!path->size || git__prefixcmp(path->ptr, ceiling) != 0) | |
398 | error = 0; | |
cccacac5 | 399 | else if (p_lstat_posixly(path->ptr, &st) == 0) { |
ad9a921b RB |
400 | if (S_ISREG(st.st_mode) || S_ISLNK(st.st_mode)) |
401 | error = p_unlink(path->ptr); | |
402 | else if (!S_ISDIR(st.st_mode)) | |
403 | error = -1; /* fail to remove non-regular file */ | |
404 | } else if (errno != ENOTDIR) | |
405 | error = -1; | |
406 | } | |
407 | ||
408 | if (error) | |
409 | futils__error_cannot_rmdir(path->ptr, "cannot remove parent"); | |
410 | ||
411 | return error; | |
412 | } | |
413 | ||
331e7de9 RB |
414 | static int futils__rmdir_recurs_foreach(void *opaque, git_buf *path) |
415 | { | |
ad9a921b | 416 | struct stat st; |
331e7de9 | 417 | futils__rmdir_data *data = opaque; |
555aa453 | 418 | |
cccacac5 | 419 | if ((data->error = p_lstat_posixly(path->ptr, &st)) < 0) { |
ad9a921b RB |
420 | if (errno == ENOENT) |
421 | data->error = 0; | |
422 | else if (errno == ENOTDIR) { | |
423 | /* asked to remove a/b/c/d/e and a/b is a normal file */ | |
424 | if ((data->flags & GIT_RMDIR_REMOVE_BLOCKERS) != 0) | |
425 | data->error = futils__rm_first_parent(path, data->base); | |
426 | else | |
427 | futils__error_cannot_rmdir( | |
428 | path->ptr, "parent is not directory"); | |
429 | } | |
430 | else | |
431 | futils__error_cannot_rmdir(path->ptr, "cannot access"); | |
432 | } | |
433 | ||
434 | else if (S_ISDIR(st.st_mode)) { | |
331e7de9 RB |
435 | int error = git_path_direach(path, futils__rmdir_recurs_foreach, data); |
436 | if (error < 0) | |
437 | return (error == GIT_EUSER) ? data->error : error; | |
438 | ||
439 | data->error = p_rmdir(path->ptr); | |
440 | ||
441 | if (data->error < 0) { | |
442 | if ((data->flags & GIT_RMDIR_SKIP_NONEMPTY) != 0 && | |
443 | (errno == ENOTEMPTY || errno == EEXIST)) | |
444 | data->error = 0; | |
445 | else | |
446 | futils__error_cannot_rmdir(path->ptr, NULL); | |
deafee7b | 447 | } |
858dba58 VM |
448 | } |
449 | ||
331e7de9 RB |
450 | else if ((data->flags & GIT_RMDIR_REMOVE_FILES) != 0) { |
451 | data->error = p_unlink(path->ptr); | |
deafee7b | 452 | |
331e7de9 RB |
453 | if (data->error < 0) |
454 | futils__error_cannot_rmdir(path->ptr, "cannot be removed"); | |
deafee7b RB |
455 | } |
456 | ||
ad9a921b | 457 | else if ((data->flags & GIT_RMDIR_SKIP_NONEMPTY) == 0) |
331e7de9 | 458 | data->error = futils__error_cannot_rmdir(path->ptr, "still present"); |
555aa453 | 459 | |
331e7de9 RB |
460 | return data->error; |
461 | } | |
462 | ||
463 | static int futils__rmdir_empty_parent(void *opaque, git_buf *path) | |
464 | { | |
7e5c8a5b RB |
465 | futils__rmdir_data *data = opaque; |
466 | int error; | |
467 | ||
468 | if (git_buf_len(path) <= data->baselen) | |
469 | return GIT_ITEROVER; | |
331e7de9 | 470 | |
7e5c8a5b | 471 | error = p_rmdir(git_buf_cstr(path)); |
331e7de9 RB |
472 | |
473 | if (error) { | |
474 | int en = errno; | |
475 | ||
476 | if (en == ENOENT || en == ENOTDIR) { | |
477 | giterr_clear(); | |
478 | error = 0; | |
479 | } else if (en == ENOTEMPTY || en == EEXIST) { | |
480 | giterr_clear(); | |
481 | error = GIT_ITEROVER; | |
482 | } else { | |
7e5c8a5b | 483 | futils__error_cannot_rmdir(git_buf_cstr(path), NULL); |
331e7de9 RB |
484 | } |
485 | } | |
486 | ||
487 | return error; | |
42b3a460 MS |
488 | } |
489 | ||
0d64bef9 | 490 | int git_futils_rmdir_r( |
331e7de9 | 491 | const char *path, const char *base, uint32_t flags) |
42b3a460 | 492 | { |
97769280 | 493 | int error; |
0d64bef9 | 494 | git_buf fullpath = GIT_BUF_INIT; |
331e7de9 | 495 | futils__rmdir_data data; |
0d64bef9 RB |
496 | |
497 | /* build path and find "root" where we should start calling mkdir */ | |
498 | if (git_path_join_unrooted(&fullpath, path, base, NULL) < 0) | |
499 | return -1; | |
500 | ||
7e5c8a5b RB |
501 | data.base = base ? base : ""; |
502 | data.baselen = base ? strlen(base) : 0; | |
503 | data.flags = flags; | |
504 | data.error = 0; | |
331e7de9 RB |
505 | |
506 | error = futils__rmdir_recurs_foreach(&data, &fullpath); | |
507 | ||
508 | /* remove now-empty parents if requested */ | |
509 | if (!error && (flags & GIT_RMDIR_EMPTY_PARENTS) != 0) { | |
510 | error = git_path_walk_up( | |
511 | &fullpath, base, futils__rmdir_empty_parent, &data); | |
512 | ||
513 | if (error == GIT_ITEROVER) | |
514 | error = 0; | |
515 | } | |
0d64bef9 RB |
516 | |
517 | git_buf_free(&fullpath); | |
97769280 | 518 | |
97769280 | 519 | return error; |
42b3a460 MS |
520 | } |
521 | ||
32a4e3b7 SS |
522 | int git_futils_find_system_file(git_buf *path, const char *filename) |
523 | { | |
524 | #ifdef GIT_WIN32 | |
525 | // try to find git.exe/git.cmd on path | |
dee18b82 | 526 | if (!win32_find_system_file_using_path(path, filename)) |
32a4e3b7 SS |
527 | return 0; |
528 | ||
529 | // try to find msysgit installation path using registry | |
dee18b82 | 530 | if (!win32_find_system_file_using_registry(path, filename)) |
32a4e3b7 | 531 | return 0; |
349fb6d7 | 532 | #else |
cb8a7961 VM |
533 | if (git_buf_joinpath(path, "/etc", filename) < 0) |
534 | return -1; | |
73b51450 | 535 | |
1a481123 | 536 | if (git_path_exists(path->ptr) == true) |
deafee7b | 537 | return 0; |
32a4e3b7 | 538 | #endif |
73b51450 RB |
539 | |
540 | git_buf_clear(path); | |
0b956819 | 541 | giterr_set(GITERR_OS, "The system file '%s' doesn't exist", filename); |
349fb6d7 | 542 | return GIT_ENOTFOUND; |
349fb6d7 | 543 | } |
73b51450 | 544 | |
349fb6d7 VM |
545 | int git_futils_find_global_file(git_buf *path, const char *filename) |
546 | { | |
73b51450 | 547 | #ifdef GIT_WIN32 |
349fb6d7 | 548 | struct win32_path root; |
0d422ec9 RB |
549 | static const wchar_t *tmpls[4] = { |
550 | L"%HOME%\\", | |
551 | L"%HOMEDRIVE%%HOMEPATH%\\", | |
552 | L"%USERPROFILE%\\", | |
553 | NULL, | |
554 | }; | |
555 | const wchar_t **tmpl; | |
556 | ||
557 | for (tmpl = tmpls; *tmpl != NULL; tmpl++) { | |
558 | /* try to expand environment variable, skipping if not set */ | |
559 | if (win32_expand_path(&root, *tmpl) != 0 || root.path[0] == L'%') | |
560 | continue; | |
561 | ||
562 | /* try to look up file under path */ | |
563 | if (!win32_find_file(path, &root, filename)) | |
aed8f8a1 | 564 | return 0; |
349fb6d7 VM |
565 | } |
566 | ||
0d422ec9 RB |
567 | giterr_set(GITERR_OS, "The global file '%s' doesn't exist", filename); |
568 | git_buf_clear(path); | |
29ef309e | 569 | |
0d422ec9 | 570 | return GIT_ENOTFOUND; |
73b51450 | 571 | #else |
0d422ec9 RB |
572 | const char *home = getenv("HOME"); |
573 | ||
349fb6d7 VM |
574 | if (home == NULL) { |
575 | giterr_set(GITERR_OS, "Global file lookup failed. " | |
576 | "Cannot locate the user's home directory"); | |
18217e7e | 577 | return GIT_ENOTFOUND; |
349fb6d7 VM |
578 | } |
579 | ||
580 | if (git_buf_joinpath(path, home, filename) < 0) | |
581 | return -1; | |
582 | ||
583 | if (git_path_exists(path->ptr) == false) { | |
0b956819 | 584 | giterr_set(GITERR_OS, "The global file '%s' doesn't exist", filename); |
349fb6d7 VM |
585 | git_buf_clear(path); |
586 | return GIT_ENOTFOUND; | |
587 | } | |
588 | ||
589 | return 0; | |
73b51450 RB |
590 | #endif |
591 | } | |
8651c10f BS |
592 | |
593 | int git_futils_fake_symlink(const char *old, const char *new) | |
594 | { | |
595 | int retcode = GIT_ERROR; | |
596 | int fd = git_futils_creat_withpath(new, 0755, 0644); | |
597 | if (fd >= 0) { | |
598 | retcode = p_write(fd, old, strlen(old)); | |
599 | p_close(fd); | |
600 | } | |
601 | return retcode; | |
602 | } | |
ca1b6e54 | 603 | |
85bd1746 | 604 | static int cp_by_fd(int ifd, int ofd, bool close_fd_when_done) |
ca1b6e54 RB |
605 | { |
606 | int error = 0; | |
607 | char buffer[4096]; | |
608 | ssize_t len = 0; | |
609 | ||
610 | while (!error && (len = p_read(ifd, buffer, sizeof(buffer))) > 0) | |
611 | /* p_write() does not have the same semantics as write(). It loops | |
612 | * internally and will return 0 when it has completed writing. | |
613 | */ | |
614 | error = p_write(ofd, buffer, len); | |
615 | ||
616 | if (len < 0) { | |
617 | giterr_set(GITERR_OS, "Read error while copying file"); | |
618 | error = (int)len; | |
619 | } | |
620 | ||
85bd1746 | 621 | if (close_fd_when_done) { |
ca1b6e54 RB |
622 | p_close(ifd); |
623 | p_close(ofd); | |
624 | } | |
625 | ||
626 | return error; | |
627 | } | |
628 | ||
85bd1746 | 629 | int git_futils_cp(const char *from, const char *to, mode_t filemode) |
ca1b6e54 RB |
630 | { |
631 | int ifd, ofd; | |
632 | ||
ca1b6e54 RB |
633 | if ((ifd = git_futils_open_ro(from)) < 0) |
634 | return ifd; | |
635 | ||
636 | if ((ofd = p_open(to, O_WRONLY | O_CREAT | O_EXCL, filemode)) < 0) { | |
637 | if (errno == ENOENT || errno == ENOTDIR) | |
638 | ofd = GIT_ENOTFOUND; | |
639 | giterr_set(GITERR_OS, "Failed to open '%s' for writing", to); | |
640 | p_close(ifd); | |
641 | return ofd; | |
642 | } | |
643 | ||
85bd1746 | 644 | return cp_by_fd(ifd, ofd, true); |
ca1b6e54 RB |
645 | } |
646 | ||
85bd1746 | 647 | static int cp_link(const char *from, const char *to, size_t link_size) |
ca1b6e54 RB |
648 | { |
649 | int error = 0; | |
650 | ssize_t read_len; | |
85bd1746 | 651 | char *link_data = git__malloc(link_size + 1); |
ca1b6e54 RB |
652 | GITERR_CHECK_ALLOC(link_data); |
653 | ||
85bd1746 RB |
654 | read_len = p_readlink(from, link_data, link_size); |
655 | if (read_len != (ssize_t)link_size) { | |
ca1b6e54 RB |
656 | giterr_set(GITERR_OS, "Failed to read symlink data for '%s'", from); |
657 | error = -1; | |
658 | } | |
659 | else { | |
660 | link_data[read_len] = '\0'; | |
661 | ||
662 | if (p_symlink(link_data, to) < 0) { | |
663 | giterr_set(GITERR_OS, "Could not symlink '%s' as '%s'", | |
664 | link_data, to); | |
665 | error = -1; | |
666 | } | |
667 | } | |
668 | ||
669 | git__free(link_data); | |
670 | return error; | |
671 | } | |
672 | ||
673 | typedef struct { | |
674 | const char *to_root; | |
675 | git_buf to; | |
676 | ssize_t from_prefix; | |
677 | uint32_t flags; | |
678 | uint32_t mkdir_flags; | |
679 | mode_t dirmode; | |
680 | } cp_r_info; | |
681 | ||
682 | static int _cp_r_callback(void *ref, git_buf *from) | |
683 | { | |
684 | cp_r_info *info = ref; | |
685 | struct stat from_st, to_st; | |
686 | bool exists = false; | |
687 | ||
688 | if ((info->flags & GIT_CPDIR_COPY_DOTFILES) == 0 && | |
689 | from->ptr[git_path_basename_offset(from)] == '.') | |
690 | return 0; | |
691 | ||
692 | if (git_buf_joinpath( | |
693 | &info->to, info->to_root, from->ptr + info->from_prefix) < 0) | |
694 | return -1; | |
695 | ||
696 | if (p_lstat(info->to.ptr, &to_st) < 0) { | |
2eb4edf5 | 697 | if (errno != ENOENT && errno != ENOTDIR) { |
ca1b6e54 RB |
698 | giterr_set(GITERR_OS, |
699 | "Could not access %s while copying files", info->to.ptr); | |
700 | return -1; | |
701 | } | |
702 | } else | |
703 | exists = true; | |
704 | ||
705 | if (git_path_lstat(from->ptr, &from_st) < 0) | |
706 | return -1; | |
707 | ||
708 | if (S_ISDIR(from_st.st_mode)) { | |
709 | int error = 0; | |
710 | mode_t oldmode = info->dirmode; | |
711 | ||
712 | /* if we are not chmod'ing, then overwrite dirmode */ | |
713 | if ((info->flags & GIT_CPDIR_CHMOD) == 0) | |
714 | info->dirmode = from_st.st_mode; | |
715 | ||
716 | /* make directory now if CREATE_EMPTY_DIRS is requested and needed */ | |
717 | if (!exists && (info->flags & GIT_CPDIR_CREATE_EMPTY_DIRS) != 0) | |
718 | error = git_futils_mkdir( | |
719 | info->to.ptr, NULL, info->dirmode, info->mkdir_flags); | |
720 | ||
721 | /* recurse onto target directory */ | |
722 | if (!exists || S_ISDIR(to_st.st_mode)) | |
723 | error = git_path_direach(from, _cp_r_callback, info); | |
724 | ||
725 | if (oldmode != 0) | |
726 | info->dirmode = oldmode; | |
727 | ||
728 | return error; | |
729 | } | |
730 | ||
731 | if (exists) { | |
732 | if ((info->flags & GIT_CPDIR_OVERWRITE) == 0) | |
733 | return 0; | |
734 | ||
735 | if (p_unlink(info->to.ptr) < 0) { | |
736 | giterr_set(GITERR_OS, "Cannot overwrite existing file '%s'", | |
737 | info->to.ptr); | |
738 | return -1; | |
739 | } | |
740 | } | |
741 | ||
742 | /* Done if this isn't a regular file or a symlink */ | |
743 | if (!S_ISREG(from_st.st_mode) && | |
744 | (!S_ISLNK(from_st.st_mode) || | |
745 | (info->flags & GIT_CPDIR_COPY_SYMLINKS) == 0)) | |
746 | return 0; | |
747 | ||
748 | /* Make container directory on demand if needed */ | |
749 | if ((info->flags & GIT_CPDIR_CREATE_EMPTY_DIRS) == 0 && | |
750 | git_futils_mkdir( | |
751 | info->to.ptr, NULL, info->dirmode, info->mkdir_flags) < 0) | |
752 | return -1; | |
753 | ||
754 | /* make symlink or regular file */ | |
755 | if (S_ISLNK(from_st.st_mode)) | |
85bd1746 | 756 | return cp_link(from->ptr, info->to.ptr, (size_t)from_st.st_size); |
ca1b6e54 | 757 | else |
85bd1746 | 758 | return git_futils_cp(from->ptr, info->to.ptr, from_st.st_mode); |
ca1b6e54 RB |
759 | } |
760 | ||
761 | int git_futils_cp_r( | |
762 | const char *from, | |
763 | const char *to, | |
764 | uint32_t flags, | |
765 | mode_t dirmode) | |
766 | { | |
767 | int error; | |
768 | git_buf path = GIT_BUF_INIT; | |
769 | cp_r_info info; | |
770 | ||
771 | if (git_buf_sets(&path, from) < 0) | |
772 | return -1; | |
773 | ||
774 | info.to_root = to; | |
775 | info.flags = flags; | |
776 | info.dirmode = dirmode; | |
777 | info.from_prefix = path.size; | |
778 | git_buf_init(&info.to, 0); | |
779 | ||
780 | /* precalculate mkdir flags */ | |
781 | if ((flags & GIT_CPDIR_CREATE_EMPTY_DIRS) == 0) { | |
782 | info.mkdir_flags = GIT_MKDIR_PATH | GIT_MKDIR_SKIP_LAST; | |
783 | if ((flags & GIT_CPDIR_CHMOD) != 0) | |
784 | info.mkdir_flags |= GIT_MKDIR_CHMOD_PATH; | |
785 | } else { | |
786 | info.mkdir_flags = | |
787 | ((flags & GIT_CPDIR_CHMOD) != 0) ? GIT_MKDIR_CHMOD : 0; | |
788 | } | |
789 | ||
790 | error = _cp_r_callback(&info, &path); | |
791 | ||
792 | git_buf_free(&path); | |
07c06f7a | 793 | git_buf_free(&info.to); |
ca1b6e54 RB |
794 | |
795 | return error; | |
796 | } | |
744cc03e | 797 | |
c1f61af6 VM |
798 | int git_futils_filestamp_check( |
799 | git_futils_filestamp *stamp, const char *path) | |
744cc03e RB |
800 | { |
801 | struct stat st; | |
802 | ||
c8b511f3 RB |
803 | /* if the stamp is NULL, then always reload */ |
804 | if (stamp == NULL) | |
744cc03e RB |
805 | return 1; |
806 | ||
807 | if (p_stat(path, &st) < 0) | |
808 | return GIT_ENOTFOUND; | |
809 | ||
c8b511f3 RB |
810 | if (stamp->mtime == (git_time_t)st.st_mtime && |
811 | stamp->size == (git_off_t)st.st_size && | |
812 | stamp->ino == (unsigned int)st.st_ino) | |
744cc03e RB |
813 | return 0; |
814 | ||
c8b511f3 RB |
815 | stamp->mtime = (git_time_t)st.st_mtime; |
816 | stamp->size = (git_off_t)st.st_size; | |
817 | stamp->ino = (unsigned int)st.st_ino; | |
744cc03e RB |
818 | |
819 | return 1; | |
820 | } | |
821 | ||
c1f61af6 VM |
822 | void git_futils_filestamp_set( |
823 | git_futils_filestamp *target, const git_futils_filestamp *source) | |
c8b511f3 RB |
824 | { |
825 | assert(target); | |
826 | ||
827 | if (source) | |
828 | memcpy(target, source, sizeof(*target)); | |
829 | else | |
830 | memset(target, 0, sizeof(*target)); | |
831 | } |