2 5d56da81 2019-01-13 stsp * Copyright (c) 2018, 2019 Stefan Sperling <stsp@openbsd.org>
3 e6eac3b8 2018-06-17 stsp * Copyright (c) 2015 Theo de Raadt <deraadt@openbsd.org>
4 0ee7065d 2019-05-13 stsp * Copyright (c) 1997 Todd C. Miller <millert@openbsd.org>
6 7b19e0f1 2017-11-05 stsp * Permission to use, copy, modify, and distribute this software for any
7 7b19e0f1 2017-11-05 stsp * purpose with or without fee is hereby granted, provided that the above
8 7b19e0f1 2017-11-05 stsp * copyright notice and this permission notice appear in all copies.
10 7b19e0f1 2017-11-05 stsp * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11 7b19e0f1 2017-11-05 stsp * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12 7b19e0f1 2017-11-05 stsp * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13 7b19e0f1 2017-11-05 stsp * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14 7b19e0f1 2017-11-05 stsp * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
15 7b19e0f1 2017-11-05 stsp * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
16 7b19e0f1 2017-11-05 stsp * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
19 e08cc72d 2019-02-05 stsp #include <sys/queue.h>
20 0cd1c46a 2019-03-11 stsp #include <sys/stat.h>
22 0cd1c46a 2019-03-11 stsp #include <errno.h>
23 2c7829a4 2019-06-17 stsp #include <fcntl.h>
24 4027f31a 2017-11-04 stsp #include <limits.h>
25 0cd1c46a 2019-03-11 stsp #include <libgen.h>
26 4027f31a 2017-11-04 stsp #include <stdlib.h>
27 4027f31a 2017-11-04 stsp #include <unistd.h>
28 4027f31a 2017-11-04 stsp #include <stdio.h>
29 4027f31a 2017-11-04 stsp #include <string.h>
30 3c45a30a 2019-05-12 jcs #include <dirent.h>
31 0ee7065d 2019-05-13 stsp #include <paths.h>
33 9d31a1d8 2018-03-11 stsp #include "got_error.h"
34 324d37e7 2019-05-11 stsp #include "got_path.h"
37 e0159033 2019-01-08 stsp #define MIN(_a,_b) ((_a) < (_b) ? (_a) : (_b))
41 4027f31a 2017-11-04 stsp got_path_is_absolute(const char *path)
43 4027f31a 2017-11-04 stsp return path[0] == '/';
47 4027f31a 2017-11-04 stsp got_path_get_absolute(const char *relpath)
49 4027f31a 2017-11-04 stsp char cwd[PATH_MAX];
50 4027f31a 2017-11-04 stsp char *abspath;
52 4027f31a 2017-11-04 stsp if (getcwd(cwd, sizeof(cwd)) == NULL)
53 4027f31a 2017-11-04 stsp return NULL;
55 4027f31a 2017-11-04 stsp if (asprintf(&abspath, "%s/%s/", cwd, relpath) == -1)
56 4027f31a 2017-11-04 stsp return NULL;
58 4027f31a 2017-11-04 stsp return abspath;
61 f7d20e89 2018-06-17 stsp /* based on canonpath() from kern_pledge.c */
62 f7d20e89 2018-06-17 stsp const struct got_error *
63 e6eac3b8 2018-06-17 stsp got_canonpath(const char *input, char *buf, size_t bufsize)
65 e6eac3b8 2018-06-17 stsp const char *p;
68 e6eac3b8 2018-06-17 stsp /* can't canon relative paths, don't bother */
69 e6eac3b8 2018-06-17 stsp if (!got_path_is_absolute(input)) {
70 e6eac3b8 2018-06-17 stsp if (strlcpy(buf, input, bufsize) >= bufsize)
71 f7d20e89 2018-06-17 stsp return got_error(GOT_ERR_NO_SPACE);
72 f7d20e89 2018-06-17 stsp return NULL;
77 e6eac3b8 2018-06-17 stsp while (*p && (q - buf < bufsize)) {
78 e6eac3b8 2018-06-17 stsp if (p[0] == '/' && (p[1] == '/' || p[1] == '\0')) {
81 e6eac3b8 2018-06-17 stsp } else if (p[0] == '/' && p[1] == '.' &&
82 e6eac3b8 2018-06-17 stsp (p[2] == '/' || p[2] == '\0')) {
85 e6eac3b8 2018-06-17 stsp } else if (p[0] == '/' && p[1] == '.' && p[2] == '.' &&
86 e6eac3b8 2018-06-17 stsp (p[3] == '/' || p[3] == '\0')) {
88 e6eac3b8 2018-06-17 stsp if (q != buf) /* "/../" at start of buf */
89 e6eac3b8 2018-06-17 stsp while (*--q != '/')
93 e6eac3b8 2018-06-17 stsp *q++ = *p++;
96 e6eac3b8 2018-06-17 stsp if ((*p == '\0') && (q - buf < bufsize)) {
98 f7d20e89 2018-06-17 stsp return NULL;
100 f7d20e89 2018-06-17 stsp return got_error(GOT_ERR_NO_SPACE);
103 04ca23f4 2018-07-16 stsp const struct got_error *
104 04ca23f4 2018-07-16 stsp got_path_skip_common_ancestor(char **child, const char *parent_abspath,
105 04ca23f4 2018-07-16 stsp const char *abspath)
107 04ca23f4 2018-07-16 stsp const struct got_error *err = NULL;
108 04ca23f4 2018-07-16 stsp size_t len_parent, len, bufsize;
110 db5ba8ed 2019-03-26 stsp *child = NULL;
112 04ca23f4 2018-07-16 stsp len_parent = strlen(parent_abspath);
113 04ca23f4 2018-07-16 stsp len = strlen(abspath);
114 04ca23f4 2018-07-16 stsp if (len_parent >= len)
115 04ca23f4 2018-07-16 stsp return got_error(GOT_ERR_BAD_PATH);
116 04ca23f4 2018-07-16 stsp if (strncmp(parent_abspath, abspath, len_parent) != 0)
117 04ca23f4 2018-07-16 stsp return got_error(GOT_ERR_BAD_PATH);
118 eb4304b9 2019-05-09 stsp if (!got_path_is_root_dir(parent_abspath) && abspath[len_parent] != '/')
119 04ca23f4 2018-07-16 stsp return got_error(GOT_ERR_BAD_PATH);
120 5e3ce57a 2019-03-26 stsp while (abspath[len_parent] == '/')
122 04ca23f4 2018-07-16 stsp bufsize = len - len_parent + 1;
123 04ca23f4 2018-07-16 stsp *child = malloc(bufsize);
124 04ca23f4 2018-07-16 stsp if (*child == NULL)
125 638f9024 2019-05-13 stsp return got_error_from_errno("malloc");
126 04ca23f4 2018-07-16 stsp if (strlcpy(*child, abspath + len_parent, bufsize) >= bufsize) {
127 638f9024 2019-05-13 stsp err = got_error_from_errno("strlcpy");
128 04ca23f4 2018-07-16 stsp free(*child);
129 04ca23f4 2018-07-16 stsp *child = NULL;
130 04ca23f4 2018-07-16 stsp return err;
132 04ca23f4 2018-07-16 stsp return NULL;
136 31cedeaf 2018-09-15 stsp got_path_is_root_dir(const char *path)
138 31cedeaf 2018-09-15 stsp return (path[0] == '/' && path[1] == '\0');
142 a129376b 2019-03-28 stsp got_path_is_current_dir(const char *path)
144 a129376b 2019-03-28 stsp return (path[0] == '.' && path[1] == '\0');
148 8da9e5f4 2019-01-12 stsp got_path_is_child(const char *child, const char *parent, size_t parent_len)
150 eb4304b9 2019-05-09 stsp if (parent_len == 0 || got_path_is_root_dir(parent))
153 8da9e5f4 2019-01-12 stsp if (strncmp(parent, child, parent_len) != 0)
155 8da9e5f4 2019-01-12 stsp if (child[parent_len] != '/')
162 d572f586 2019-08-02 stsp got_path_cmp(const char *path1, const char *path2, size_t len1, size_t len2)
164 466d3b32 2019-08-02 stsp size_t min_len;
165 e0159033 2019-01-08 stsp size_t i = 0;
167 e08cc72d 2019-02-05 stsp /* Leading directory separators are insignificant. */
168 466d3b32 2019-08-02 stsp while (path1[0] == '/') {
172 466d3b32 2019-08-02 stsp while (path2[0] == '/') {
177 e08cc72d 2019-02-05 stsp min_len = MIN(len1, len2);
179 e0159033 2019-01-08 stsp /* Skip over common prefix. */
180 e0159033 2019-01-08 stsp while (i < min_len && path1[i] == path2[i])
183 e08cc72d 2019-02-05 stsp /* Are the paths exactly equal (besides path separators)? */
184 e0159033 2019-01-08 stsp if (len1 == len2 && i >= min_len)
187 e08cc72d 2019-02-05 stsp /* Skip over redundant trailing path seperators. */
188 e08cc72d 2019-02-05 stsp while (path1[i] == '/' && path1[i + 1] == '/')
190 e08cc72d 2019-02-05 stsp while (path2[i] == '/' && path2[i + 1] == '/')
193 e08cc72d 2019-02-05 stsp /* Trailing path separators are insignificant. */
194 e08cc72d 2019-02-05 stsp if (path1[i] == '/' && path1[i + 1] == '\0' && path2[i] == '\0')
196 e08cc72d 2019-02-05 stsp if (path2[i] == '/' && path2[i + 1] == '\0' && path1[i] == '\0')
199 e0159033 2019-01-08 stsp /* Order children in subdirectories directly after their parents. */
200 e0159033 2019-01-08 stsp if (path1[i] == '/' && path2[i] == '\0')
202 e0159033 2019-01-08 stsp if (path2[i] == '/' && path1[i] == '\0')
204 e08cc72d 2019-02-05 stsp if (path1[i] == '/' && path2[i] != '\0')
206 e08cc72d 2019-02-05 stsp if (path2[i] == '/' && path1[i] != '\0')
209 e0159033 2019-01-08 stsp /* Next character following the common prefix determines order. */
210 e0159033 2019-01-08 stsp return (unsigned char)path1[i] < (unsigned char)path2[i] ? -1 : 1;
213 e08cc72d 2019-02-05 stsp const struct got_error *
214 7e5c804b 2019-02-05 stsp got_pathlist_insert(struct got_pathlist_entry **inserted,
215 3d8df59c 2019-02-05 stsp struct got_pathlist_head *pathlist, const char *path, void *data)
217 e08cc72d 2019-02-05 stsp struct got_pathlist_entry *new, *pe;
219 7e5c804b 2019-02-05 stsp if (inserted)
220 7e5c804b 2019-02-05 stsp *inserted = NULL;
222 e08cc72d 2019-02-05 stsp new = malloc(sizeof(*new));
223 e08cc72d 2019-02-05 stsp if (new == NULL)
224 638f9024 2019-05-13 stsp return got_error_from_errno("malloc");
225 e08cc72d 2019-02-05 stsp new->path = path;
226 f2b16ada 2019-08-02 stsp new->path_len = strlen(path);
227 3d8df59c 2019-02-05 stsp new->data = data;
230 e08cc72d 2019-02-05 stsp * Many callers will provide paths in a somewhat sorted order while
231 e08cc72d 2019-02-05 stsp * constructing a path list from inputs such as tree objects or
232 e08cc72d 2019-02-05 stsp * dirents. Iterating backwards from the tail of the list should
233 e08cc72d 2019-02-05 stsp * be more efficient than traversing through the entire list each
234 e08cc72d 2019-02-05 stsp * time an element is inserted.
236 e08cc72d 2019-02-05 stsp pe = TAILQ_LAST(pathlist, got_pathlist_head);
237 e08cc72d 2019-02-05 stsp while (pe) {
238 f2b16ada 2019-08-02 stsp int cmp = got_path_cmp(pe->path, new->path,
239 f2b16ada 2019-08-02 stsp pe->path_len, new->path_len);
240 e08cc72d 2019-02-05 stsp if (cmp == 0) {
241 e08cc72d 2019-02-05 stsp free(new); /* duplicate */
242 e08cc72d 2019-02-05 stsp return NULL;
243 e08cc72d 2019-02-05 stsp } else if (cmp < 0) {
244 e08cc72d 2019-02-05 stsp TAILQ_INSERT_AFTER(pathlist, pe, new, entry);
245 7e5c804b 2019-02-05 stsp if (inserted)
246 7e5c804b 2019-02-05 stsp *inserted = new;
247 e08cc72d 2019-02-05 stsp return NULL;
249 e08cc72d 2019-02-05 stsp pe = TAILQ_PREV(pe, got_pathlist_head, entry);
252 e08cc72d 2019-02-05 stsp TAILQ_INSERT_HEAD(pathlist, new, entry);
253 7e5c804b 2019-02-05 stsp if (inserted)
254 7e5c804b 2019-02-05 stsp *inserted = new;
255 e08cc72d 2019-02-05 stsp return NULL;
258 72ea6654 2019-07-27 stsp const struct got_error *
259 adc19d55 2019-07-28 stsp got_pathlist_append(struct got_pathlist_head *pathlist,
260 adc19d55 2019-07-28 stsp const char *path, void *data)
262 72ea6654 2019-07-27 stsp struct got_pathlist_entry *new;
264 72ea6654 2019-07-27 stsp new = malloc(sizeof(*new));
265 72ea6654 2019-07-27 stsp if (new == NULL)
266 72ea6654 2019-07-27 stsp return got_error_from_errno("malloc");
267 72ea6654 2019-07-27 stsp new->path = path;
268 f2b16ada 2019-08-02 stsp new->path_len = strlen(path);
269 72ea6654 2019-07-27 stsp new->data = data;
270 72ea6654 2019-07-27 stsp TAILQ_INSERT_TAIL(pathlist, new, entry);
271 72ea6654 2019-07-27 stsp return NULL;
275 e08cc72d 2019-02-05 stsp got_pathlist_free(struct got_pathlist_head *pathlist)
277 e08cc72d 2019-02-05 stsp struct got_pathlist_entry *pe;
279 e08cc72d 2019-02-05 stsp while ((pe = TAILQ_FIRST(pathlist)) != NULL) {
280 e08cc72d 2019-02-05 stsp TAILQ_REMOVE(pathlist, pe, entry);
285 0cd1c46a 2019-03-11 stsp static const struct got_error *
286 0cd1c46a 2019-03-11 stsp make_parent_dirs(const char *abspath)
288 0cd1c46a 2019-03-11 stsp const struct got_error *err = NULL;
289 d1667f0d 2019-03-11 stsp char *parent;
291 d1667f0d 2019-03-11 stsp err = got_path_dirname(&parent, abspath);
293 d1667f0d 2019-03-11 stsp return err;
295 0cd1c46a 2019-03-11 stsp if (mkdir(parent, GOT_DEFAULT_DIR_MODE) == -1) {
296 0cd1c46a 2019-03-11 stsp if (errno == ENOENT) {
297 0cd1c46a 2019-03-11 stsp err = make_parent_dirs(parent);
300 5e1c9f23 2019-03-11 stsp if (mkdir(parent, GOT_DEFAULT_DIR_MODE) == -1) {
301 638f9024 2019-05-13 stsp err = got_error_from_errno2("mkdir", parent);
305 638f9024 2019-05-13 stsp err = got_error_from_errno2("mkdir", parent);
308 5e1c9f23 2019-03-11 stsp free(parent);
309 0cd1c46a 2019-03-11 stsp return err;
312 0cd1c46a 2019-03-11 stsp const struct got_error *
313 0cd1c46a 2019-03-11 stsp got_path_mkdir(const char *abspath)
315 0cd1c46a 2019-03-11 stsp const struct got_error *err = NULL;
317 0cd1c46a 2019-03-11 stsp if (mkdir(abspath, GOT_DEFAULT_DIR_MODE) == -1) {
318 ddcd8544 2019-03-11 stsp if (errno == ENOENT) {
319 0cd1c46a 2019-03-11 stsp err = make_parent_dirs(abspath);
322 0cd1c46a 2019-03-11 stsp if (mkdir(abspath, GOT_DEFAULT_DIR_MODE) == -1)
323 638f9024 2019-05-13 stsp err = got_error_from_errno2("mkdir", abspath);
325 638f9024 2019-05-13 stsp err = got_error_from_errno2("mkdir", abspath);
329 0cd1c46a 2019-03-11 stsp return err;
333 280f921b 2019-05-12 stsp got_path_dir_is_empty(const char *dir)
336 3c45a30a 2019-05-12 jcs struct dirent *dent;
337 3c45a30a 2019-05-12 jcs int empty = 1;
339 3c45a30a 2019-05-12 jcs d = opendir(dir);
340 3c45a30a 2019-05-12 jcs if (d == NULL)
343 3c45a30a 2019-05-12 jcs while ((dent = readdir(d)) != NULL) {
344 3c45a30a 2019-05-12 jcs if (strcmp(dent->d_name, ".") == 0 ||
345 3c45a30a 2019-05-12 jcs strcmp(dent->d_name, "..") == 0)
352 7f2a8dc2 2019-05-12 stsp closedir(d);
353 3c45a30a 2019-05-12 jcs return empty;
356 d1667f0d 2019-03-11 stsp const struct got_error *
357 d1667f0d 2019-03-11 stsp got_path_dirname(char **parent, const char *path)
361 d1667f0d 2019-03-11 stsp p = dirname(path);
362 d1667f0d 2019-03-11 stsp if (p == NULL)
363 638f9024 2019-05-13 stsp return got_error_from_errno2("dirname", path);
365 d1667f0d 2019-03-11 stsp if (p[0] == '.' && p[1] == '\0')
366 d1667f0d 2019-03-11 stsp return got_error(GOT_ERR_BAD_PATH);
368 d1667f0d 2019-03-11 stsp *parent = strdup(p);
369 d1667f0d 2019-03-11 stsp if (*parent == NULL)
370 f2ea84fa 2019-07-27 stsp return got_error_from_errno("strdup");
372 f2ea84fa 2019-07-27 stsp return NULL;
375 f2ea84fa 2019-07-27 stsp const struct got_error *
376 f2ea84fa 2019-07-27 stsp got_path_basename(char **s, const char *path)
378 f2ea84fa 2019-07-27 stsp char *base;
380 f2ea84fa 2019-07-27 stsp base = basename(path);
381 f2ea84fa 2019-07-27 stsp if (base == NULL)
382 f2ea84fa 2019-07-27 stsp return got_error_from_errno2("basename", path);
384 f2ea84fa 2019-07-27 stsp *s = strdup(base);
385 f2ea84fa 2019-07-27 stsp if (*s == NULL)
386 638f9024 2019-05-13 stsp return got_error_from_errno("strdup");
388 d1667f0d 2019-03-11 stsp return NULL;
392 72151b04 2019-05-11 stsp got_path_strip_trailing_slashes(char *path)
396 455de7fa 2020-01-12 tb x = strlen(path);
397 455de7fa 2020-01-12 tb while (x-- > 0 && path[x] == '/')
398 72151b04 2019-05-11 stsp path[x] = '\0';
401 08680430 2019-05-13 stsp /* based on findprog() from usr.sbin/which/which.c */
402 0ee7065d 2019-05-13 stsp const struct got_error *
403 0ee7065d 2019-05-13 stsp got_path_find_prog(char **filename, const char *prog)
405 202329ae 2019-08-11 stsp const struct got_error *err = NULL;
408 0ee7065d 2019-05-13 stsp struct stat sbuf;
409 0ee7065d 2019-05-13 stsp char *path, *pathcpy;
411 0ee7065d 2019-05-13 stsp *filename = NULL;
413 0ee7065d 2019-05-13 stsp path = getenv("PATH");
414 0ee7065d 2019-05-13 stsp if (path == NULL)
415 0ee7065d 2019-05-13 stsp path = _PATH_DEFPATH;
417 0ee7065d 2019-05-13 stsp /* Special case if prog contains '/' */
418 0ee7065d 2019-05-13 stsp if (strchr(prog, '/')) {
419 0ee7065d 2019-05-13 stsp if ((stat(prog, &sbuf) == 0) && S_ISREG(sbuf.st_mode) &&
420 0ee7065d 2019-05-13 stsp access(prog, X_OK) == 0) {
421 0ee7065d 2019-05-13 stsp *filename = strdup(prog);
422 0ee7065d 2019-05-13 stsp if (*filename == NULL)
423 0ee7065d 2019-05-13 stsp return got_error_from_errno("strdup");
425 0ee7065d 2019-05-13 stsp return NULL;
428 0ee7065d 2019-05-13 stsp if ((path = strdup(path)) == NULL)
429 0ee7065d 2019-05-13 stsp return got_error_from_errno("strdup");
430 0ee7065d 2019-05-13 stsp pathcpy = path;
432 0ee7065d 2019-05-13 stsp while ((p = strsep(&pathcpy, ":")) != NULL) {
433 0ee7065d 2019-05-13 stsp if (*p == '\0')
436 0ee7065d 2019-05-13 stsp len = strlen(p);
437 0ee7065d 2019-05-13 stsp while (len > 0 && p[len-1] == '/')
438 0ee7065d 2019-05-13 stsp p[--len] = '\0'; /* strip trailing '/' */
440 0ee7065d 2019-05-13 stsp if (asprintf(filename, "%s/%s", p, prog) == -1) {
441 202329ae 2019-08-11 stsp err = got_error_from_errno("asprintf");
444 0ee7065d 2019-05-13 stsp if ((stat(*filename, &sbuf) == 0) && S_ISREG(sbuf.st_mode) &&
445 718ef3e9 2019-08-11 stsp access(*filename, X_OK) == 0)
447 0ee7065d 2019-05-13 stsp free(*filename);
448 0ee7065d 2019-05-13 stsp *filename = NULL;
451 0ee7065d 2019-05-13 stsp free(path);
452 5cade901 2019-09-22 stsp return err;
455 2c7829a4 2019-06-17 stsp const struct got_error *
456 2c7829a4 2019-06-17 stsp got_path_create_file(const char *path, const char *content)
458 2c7829a4 2019-06-17 stsp const struct got_error *err = NULL;
459 2c7829a4 2019-06-17 stsp int fd = -1;
461 2c7829a4 2019-06-17 stsp fd = open(path, O_RDWR | O_CREAT | O_EXCL | O_NOFOLLOW,
462 2c7829a4 2019-06-17 stsp GOT_DEFAULT_FILE_MODE);
463 2c7829a4 2019-06-17 stsp if (fd == -1) {
464 2c7829a4 2019-06-17 stsp err = got_error_from_errno2("open", path);
468 2c7829a4 2019-06-17 stsp if (content) {
469 2c7829a4 2019-06-17 stsp int len = dprintf(fd, "%s\n", content);
470 2c7829a4 2019-06-17 stsp if (len != strlen(content) + 1) {
471 2c7829a4 2019-06-17 stsp err = got_error_from_errno("dprintf");
477 2c7829a4 2019-06-17 stsp if (fd != -1 && close(fd) == -1 && err == NULL)
478 2c7829a4 2019-06-17 stsp err = got_error_from_errno("close");
479 2c7829a4 2019-06-17 stsp return err;
