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git.ipfire.org Git - thirdparty/systemd.git/blob - src/basic/path-util.h
1 /* SPDX-License-Identifier: LGPL-2.1+ */
5 This file is part of systemd.
7 Copyright 2010-2012 Lennart Poettering
15 #include "string-util.h"
16 #include "time-util.h"
18 #define PATH_SPLIT_SBIN_BIN(x) x "sbin:" x "bin"
19 #define PATH_SPLIT_SBIN_BIN_NULSTR(x) x "sbin\0" x "bin\0"
21 #define PATH_NORMAL_SBIN_BIN(x) x "bin"
22 #define PATH_NORMAL_SBIN_BIN_NULSTR(x) x "bin\0"
25 # define PATH_SBIN_BIN(x) PATH_SPLIT_SBIN_BIN(x)
26 # define PATH_SBIN_BIN_NULSTR(x) PATH_SPLIT_SBIN_BIN_NULSTR(x)
28 # define PATH_SBIN_BIN(x) PATH_NORMAL_SBIN_BIN(x)
29 # define PATH_SBIN_BIN_NULSTR(x) PATH_NORMAL_SBIN_BIN_NULSTR(x)
32 #define DEFAULT_PATH_NORMAL PATH_SBIN_BIN("/usr/local/") ":" PATH_SBIN_BIN("/usr/")
33 #define DEFAULT_PATH_NORMAL_NULSTR PATH_SBIN_BIN_NULSTR("/usr/local/") PATH_SBIN_BIN_NULSTR("/usr/")
34 #define DEFAULT_PATH_SPLIT_USR DEFAULT_PATH_NORMAL ":" PATH_SBIN_BIN("/")
35 #define DEFAULT_PATH_SPLIT_USR_NULSTR DEFAULT_PATH_NORMAL_NULSTR PATH_SBIN_BIN_NULSTR("/")
36 #define DEFAULT_PATH_COMPAT PATH_SPLIT_SBIN_BIN("/usr/local/") ":" PATH_SPLIT_SBIN_BIN("/usr/") ":" PATH_SPLIT_SBIN_BIN("/")
39 # define DEFAULT_PATH DEFAULT_PATH_SPLIT_USR
40 # define DEFAULT_PATH_NULSTR DEFAULT_PATH_SPLIT_USR_NULSTR
42 # define DEFAULT_PATH DEFAULT_PATH_NORMAL
43 # define DEFAULT_PATH_NULSTR DEFAULT_PATH_NORMAL_NULSTR
46 bool is_path(const char *p
) _pure_
;
47 int path_split_and_make_absolute(const char *p
, char ***ret
);
48 bool path_is_absolute(const char *p
) _pure_
;
49 char* path_make_absolute(const char *p
, const char *prefix
);
50 int safe_getcwd(char **ret
);
51 int path_make_absolute_cwd(const char *p
, char **ret
);
52 int path_make_relative(const char *from_dir
, const char *to_path
, char **_r
);
53 char* path_startswith(const char *path
, const char *prefix
) _pure_
;
54 int path_compare(const char *a
, const char *b
) _pure_
;
55 bool path_equal(const char *a
, const char *b
) _pure_
;
56 bool path_equal_or_files_same(const char *a
, const char *b
, int flags
);
57 char* path_join(const char *root
, const char *path
, const char *rest
);
58 char* path_simplify(char *path
, bool kill_dots
);
60 static inline bool path_equal_ptr(const char *a
, const char *b
) {
61 return !!a
== !!b
&& (!a
|| path_equal(a
, b
));
64 /* Note: the search terminates on the first NULL item. */
65 #define PATH_IN_SET(p, ...) \
68 bool _found = false; \
69 STRV_FOREACH(s, STRV_MAKE(__VA_ARGS__)) \
70 if (path_equal(p, *s)) { \
77 #define PATH_STARTSWITH_SET(p, ...) \
80 bool _found = false; \
81 STRV_FOREACH(s, STRV_MAKE(__VA_ARGS__)) \
82 if (path_startswith(p, *s)) { \
89 int path_strv_make_absolute_cwd(char **l
);
90 char** path_strv_resolve(char **l
, const char *root
);
91 char** path_strv_resolve_uniq(char **l
, const char *root
);
93 int find_binary(const char *name
, char **filename
);
95 bool paths_check_timestamp(const char* const* paths
, usec_t
*paths_ts_usec
, bool update
);
97 int fsck_exists(const char *fstype
);
98 int mkfs_exists(const char *fstype
);
100 /* Iterates through the path prefixes of the specified path, going up
101 * the tree, to root. Also returns "" (and not "/"!) for the root
102 * directory. Excludes the specified directory itself */
103 #define PATH_FOREACH_PREFIX(prefix, path) \
104 for (char *_slash = ({ path_simplify(strcpy(prefix, path), false); streq(prefix, "/") ? NULL : strrchr(prefix, '/'); }); _slash && ((*_slash = 0), true); _slash = strrchr((prefix), '/'))
106 /* Same as PATH_FOREACH_PREFIX but also includes the specified path itself */
107 #define PATH_FOREACH_PREFIX_MORE(prefix, path) \
108 for (char *_slash = ({ path_simplify(strcpy(prefix, path), false); if (streq(prefix, "/")) prefix[0] = 0; strrchr(prefix, 0); }); _slash && ((*_slash = 0), true); _slash = strrchr((prefix), '/'))
110 char *prefix_root(const char *root
, const char *path
);
112 /* Similar to prefix_root(), but returns an alloca() buffer, or
113 * possibly a const pointer into the path parameter */
114 #define prefix_roota(root, path) \
116 const char* _path = (path), *_root = (root), *_ret; \
119 while (_path[0] == '/' && _path[1] == '/') \
121 if (empty_or_root(_root)) \
124 _l = strlen(_root) + 1 + strlen(_path) + 1; \
126 _p = stpcpy(_n, _root); \
127 while (_p > _n && _p[-1] == '/') \
129 if (_path[0] != '/') \
137 int parse_path_argument_and_warn(const char *path
, bool suppress_root
, char **arg
);
139 char* dirname_malloc(const char *path
);
140 const char *last_path_component(const char *path
);
142 bool filename_is_valid(const char *p
) _pure_
;
143 bool path_is_normalized(const char *p
) _pure_
;
145 char *file_in_same_dir(const char *path
, const char *filename
);
147 bool hidden_or_backup_file(const char *filename
) _pure_
;
149 bool is_device_path(const char *path
);
151 bool valid_device_node_path(const char *path
);
152 bool valid_device_allow_pattern(const char *path
);
154 int systemd_installation_has_version(const char *root
, unsigned minimal_version
);
156 bool dot_or_dot_dot(const char *path
);
158 static inline const char *skip_dev_prefix(const char *p
) {
161 /* Drop any /dev prefix if there is any */
163 e
= path_startswith(p
, "/dev/");
168 bool empty_or_root(const char *root
);
169 static inline const char *empty_to_root(const char *path
) {
170 return isempty(path
) ? "/" : path
;
174 PATH_CHECK_FATAL
= 1 << 0, /* If not set, then error message is appended with 'ignoring'. */
175 PATH_CHECK_ABSOLUTE
= 1 << 1,
176 PATH_CHECK_RELATIVE
= 1 << 2,
179 int path_simplify_and_warn(char *path
, unsigned flag
, const char *unit
, const char *filename
, unsigned line
, const char *lvalue
);