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git.ipfire.org Git - thirdparty/systemd.git/blob - src/basic/path-util.h
1 /* SPDX-License-Identifier: LGPL-2.1+ */
9 #include "string-util.h"
10 #include "time-util.h"
12 #define PATH_SPLIT_SBIN_BIN(x) x "sbin:" x "bin"
13 #define PATH_SPLIT_SBIN_BIN_NULSTR(x) x "sbin\0" x "bin\0"
15 #define PATH_NORMAL_SBIN_BIN(x) x "bin"
16 #define PATH_NORMAL_SBIN_BIN_NULSTR(x) x "bin\0"
19 # define PATH_SBIN_BIN(x) PATH_SPLIT_SBIN_BIN(x)
20 # define PATH_SBIN_BIN_NULSTR(x) PATH_SPLIT_SBIN_BIN_NULSTR(x)
22 # define PATH_SBIN_BIN(x) PATH_NORMAL_SBIN_BIN(x)
23 # define PATH_SBIN_BIN_NULSTR(x) PATH_NORMAL_SBIN_BIN_NULSTR(x)
26 #define DEFAULT_PATH_NORMAL PATH_SBIN_BIN("/usr/local/") ":" PATH_SBIN_BIN("/usr/")
27 #define DEFAULT_PATH_NORMAL_NULSTR PATH_SBIN_BIN_NULSTR("/usr/local/") PATH_SBIN_BIN_NULSTR("/usr/")
28 #define DEFAULT_PATH_SPLIT_USR DEFAULT_PATH_NORMAL ":" PATH_SBIN_BIN("/")
29 #define DEFAULT_PATH_SPLIT_USR_NULSTR DEFAULT_PATH_NORMAL_NULSTR PATH_SBIN_BIN_NULSTR("/")
30 #define DEFAULT_PATH_COMPAT PATH_SPLIT_SBIN_BIN("/usr/local/") ":" PATH_SPLIT_SBIN_BIN("/usr/") ":" PATH_SPLIT_SBIN_BIN("/")
33 # define DEFAULT_PATH DEFAULT_PATH_SPLIT_USR
34 # define DEFAULT_PATH_NULSTR DEFAULT_PATH_SPLIT_USR_NULSTR
36 # define DEFAULT_PATH DEFAULT_PATH_NORMAL
37 # define DEFAULT_PATH_NULSTR DEFAULT_PATH_NORMAL_NULSTR
40 bool is_path(const char *p
) _pure_
;
41 int path_split_and_make_absolute(const char *p
, char ***ret
);
42 bool path_is_absolute(const char *p
) _pure_
;
43 char* path_make_absolute(const char *p
, const char *prefix
);
44 int safe_getcwd(char **ret
);
45 int path_make_absolute_cwd(const char *p
, char **ret
);
46 int path_make_relative(const char *from_dir
, const char *to_path
, char **_r
);
47 char* path_startswith(const char *path
, const char *prefix
) _pure_
;
48 int path_compare(const char *a
, const char *b
) _pure_
;
49 bool path_equal(const char *a
, const char *b
) _pure_
;
50 bool path_equal_or_files_same(const char *a
, const char *b
, int flags
);
51 char* path_join(const char *root
, const char *path
, const char *rest
);
52 char* path_simplify(char *path
, bool kill_dots
);
54 static inline bool path_equal_ptr(const char *a
, const char *b
) {
55 return !!a
== !!b
&& (!a
|| path_equal(a
, b
));
58 /* Note: the search terminates on the first NULL item. */
59 #define PATH_IN_SET(p, ...) \
62 bool _found = false; \
63 STRV_FOREACH(_s, STRV_MAKE(__VA_ARGS__)) \
64 if (path_equal(p, *_s)) { \
71 #define PATH_STARTSWITH_SET(p, ...) \
74 bool _found = false; \
75 STRV_FOREACH(s, STRV_MAKE(__VA_ARGS__)) \
76 if (path_startswith(p, *s)) { \
83 int path_strv_make_absolute_cwd(char **l
);
84 char** path_strv_resolve(char **l
, const char *root
);
85 char** path_strv_resolve_uniq(char **l
, const char *root
);
87 int find_binary(const char *name
, char **filename
);
89 bool paths_check_timestamp(const char* const* paths
, usec_t
*paths_ts_usec
, bool update
);
91 int fsck_exists(const char *fstype
);
92 int mkfs_exists(const char *fstype
);
94 /* Iterates through the path prefixes of the specified path, going up
95 * the tree, to root. Also returns "" (and not "/"!) for the root
96 * directory. Excludes the specified directory itself */
97 #define PATH_FOREACH_PREFIX(prefix, path) \
98 for (char *_slash = ({ path_simplify(strcpy(prefix, path), false); streq(prefix, "/") ? NULL : strrchr(prefix, '/'); }); _slash && ((*_slash = 0), true); _slash = strrchr((prefix), '/'))
100 /* Same as PATH_FOREACH_PREFIX but also includes the specified path itself */
101 #define PATH_FOREACH_PREFIX_MORE(prefix, path) \
102 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), '/'))
104 char *prefix_root(const char *root
, const char *path
);
106 /* Similar to prefix_root(), but returns an alloca() buffer, or
107 * possibly a const pointer into the path parameter */
108 #define prefix_roota(root, path) \
110 const char* _path = (path), *_root = (root), *_ret; \
113 while (_path[0] == '/' && _path[1] == '/') \
115 if (empty_or_root(_root)) \
118 _l = strlen(_root) + 1 + strlen(_path) + 1; \
120 _p = stpcpy(_n, _root); \
121 while (_p > _n && _p[-1] == '/') \
123 if (_path[0] != '/') \
131 int parse_path_argument_and_warn(const char *path
, bool suppress_root
, char **arg
);
133 char* dirname_malloc(const char *path
);
134 const char *last_path_component(const char *path
);
136 bool filename_is_valid(const char *p
) _pure_
;
137 bool path_is_normalized(const char *p
) _pure_
;
139 char *file_in_same_dir(const char *path
, const char *filename
);
141 bool hidden_or_backup_file(const char *filename
) _pure_
;
143 bool is_device_path(const char *path
);
145 bool valid_device_node_path(const char *path
);
146 bool valid_device_allow_pattern(const char *path
);
148 int systemd_installation_has_version(const char *root
, unsigned minimal_version
);
150 bool dot_or_dot_dot(const char *path
);
152 static inline const char *skip_dev_prefix(const char *p
) {
155 /* Drop any /dev prefix if there is any */
157 e
= path_startswith(p
, "/dev/");
162 bool empty_or_root(const char *root
);
163 static inline const char *empty_to_root(const char *path
) {
164 return isempty(path
) ? "/" : path
;
168 PATH_CHECK_FATAL
= 1 << 0, /* If not set, then error message is appended with 'ignoring'. */
169 PATH_CHECK_ABSOLUTE
= 1 << 1,
170 PATH_CHECK_RELATIVE
= 1 << 2,
173 int path_simplify_and_warn(char *path
, unsigned flag
, const char *unit
, const char *filename
, unsigned line
, const char *lvalue
);