1 /* SPDX-License-Identifier: LGPL-2.1+ */
5 This file is part of systemd.
7 Copyright 2010-2012 Lennart Poettering
9 elogind is free software; you can redistribute it and/or modify it
10 under the terms of the GNU Lesser General Public License as published by
11 the Free Software Foundation; either version 2.1 of the License, or
12 (at your option) any later version.
14 elogind is distributed in the hope that it will be useful, but
15 WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 Lesser General Public License for more details.
19 You should have received a copy of the GNU Lesser General Public License
20 along with elogind; If not, see <http://www.gnu.org/licenses/>.
28 #include "string-util.h"
29 #include "time-util.h"
32 # define PATH_SBIN_BIN(x) x "sbin:" x "bin"
33 # define PATH0_SBIN_BIN(x) x "sbin\0" x "bin"
35 # define PATH0_SBIN_BIN(x) x "bin"
36 # define PATH_SBIN_BIN(x) x "bin"
39 #define DEFAULT_PATH_NORMAL PATH_SBIN_BIN("/usr/local/") ":" PATH_SBIN_BIN("/usr/")
40 #define DEFAULT_PATH0_NORMAL PATH0_SBIN_BIN("/usr/local/") "\0" PATH0_SBIN_BIN("/usr/")
41 #define DEFAULT_PATH_SPLIT_USR DEFAULT_PATH_NORMAL ":" PATH_SBIN_BIN("/")
42 #define DEFAULT_PATH0_SPLIT_USR DEFAULT_PATH0_NORMAL "\0" PATH0_SBIN_BIN("/")
45 # define DEFAULT_PATH DEFAULT_PATH_SPLIT_USR
46 # define DEFAULT_PATH_NULSTR DEFAULT_PATH0_SPLIT_USR
48 # define DEFAULT_PATH DEFAULT_PATH_NORMAL
49 # define DEFAULT_PATH_NULSTR DEFAULT_PATH0_NORMAL
52 bool is_path(const char *p) _pure_;
53 #if 0 /// UNNEEDED by elogind
54 int path_split_and_make_absolute(const char *p, char ***ret);
56 bool path_is_absolute(const char *p) _pure_;
57 #if 0 /// UNNEEDED by elogind
58 char* path_make_absolute(const char *p, const char *prefix);
60 int safe_getcwd(char **ret);
61 int path_make_absolute_cwd(const char *p, char **ret);
62 #if 0 /// UNNEEDED by elogind
63 int path_make_relative(const char *from_dir, const char *to_path, char **_r);
65 char* path_kill_slashes(char *path);
66 char* path_startswith(const char *path, const char *prefix) _pure_;
67 int path_compare(const char *a, const char *b) _pure_;
68 bool path_equal(const char *a, const char *b) _pure_;
69 bool path_equal_or_files_same(const char *a, const char *b, int flags);
70 char* path_join(const char *root, const char *path, const char *rest);
72 static inline bool path_equal_ptr(const char *a, const char *b) {
73 return !!a == !!b && (!a || path_equal(a, b));
76 /* Note: the search terminates on the first NULL item. */
77 #define PATH_IN_SET(p, ...) \
80 bool _found = false; \
81 STRV_FOREACH(s, STRV_MAKE(__VA_ARGS__)) \
82 if (path_equal(p, *s)) { \
89 #if 0 /// UNNEEDED by elogind
90 #define PATH_STARTSWITH_SET(p, ...) \
93 bool _found = false; \
94 STRV_FOREACH(s, STRV_MAKE(__VA_ARGS__)) \
95 if (path_startswith(p, *s)) { \
102 int path_strv_make_absolute_cwd(char **l);
104 char** path_strv_resolve(char **l, const char *root);
105 char** path_strv_resolve_uniq(char **l, const char *root);
107 int find_binary(const char *name, char **filename);
109 #if 0 /// UNNEEDED by elogind
110 bool paths_check_timestamp(const char* const* paths, usec_t *paths_ts_usec, bool update);
112 int fsck_exists(const char *fstype);
113 int mkfs_exists(const char *fstype);
116 /* Iterates through the path prefixes of the specified path, going up
117 * the tree, to root. Also returns "" (and not "/"!) for the root
118 * directory. Excludes the specified directory itself */
119 #define PATH_FOREACH_PREFIX(prefix, path) \
120 for (char *_slash = ({ path_kill_slashes(strcpy(prefix, path)); streq(prefix, "/") ? NULL : strrchr(prefix, '/'); }); _slash && ((*_slash = 0), true); _slash = strrchr((prefix), '/'))
122 /* Same as PATH_FOREACH_PREFIX but also includes the specified path itself */
123 #define PATH_FOREACH_PREFIX_MORE(prefix, path) \
124 for (char *_slash = ({ path_kill_slashes(strcpy(prefix, path)); if (streq(prefix, "/")) prefix[0] = 0; strrchr(prefix, 0); }); _slash && ((*_slash = 0), true); _slash = strrchr((prefix), '/'))
126 char *prefix_root(const char *root, const char *path);
128 /* Similar to prefix_root(), but returns an alloca() buffer, or
129 * possibly a const pointer into the path parameter */
130 #define prefix_roota(root, path) \
132 const char* _path = (path), *_root = (root), *_ret; \
135 while (_path[0] == '/' && _path[1] == '/') \
137 if (isempty(_root) || path_equal(_root, "/")) \
140 _l = strlen(_root) + 1 + strlen(_path) + 1; \
142 _p = stpcpy(_n, _root); \
143 while (_p > _n && _p[-1] == '/') \
145 if (_path[0] != '/') \
153 #if 0 /// UNNEEDED by elogind
154 int parse_path_argument_and_warn(const char *path, bool suppress_root, char **arg);
157 char* dirname_malloc(const char *path);
158 const char *last_path_component(const char *path);
160 bool filename_is_valid(const char *p) _pure_;
161 bool path_is_normalized(const char *p) _pure_;
163 char *file_in_same_dir(const char *path, const char *filename);
165 bool hidden_or_backup_file(const char *filename) _pure_;
167 #if 0 /// UNNEEDED by elogind
168 bool is_device_path(const char *path);
169 bool is_deviceallow_pattern(const char *path);
171 int systemd_installation_has_version(const char *root, unsigned minimal_version);
174 bool dot_or_dot_dot(const char *path);
176 static inline const char *skip_dev_prefix(const char *p) {
179 /* Drop any /dev prefix if there is any */
181 e = path_startswith(p, "/dev/");