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 #if 0 /// UNNEEDED by elogind
48 int path_split_and_make_absolute(const char *p, char ***ret);
50 bool path_is_absolute(const char *p) _pure_;
51 #if 0 /// UNNEEDED by elogind
52 char* path_make_absolute(const char *p, const char *prefix);
54 int safe_getcwd(char **ret);
55 int path_make_absolute_cwd(const char *p, char **ret);
56 #if 0 /// UNNEEDED by elogind
57 int path_make_relative(const char *from_dir, const char *to_path, char **_r);
59 char* path_startswith(const char *path, const char *prefix) _pure_;
60 int path_compare(const char *a, const char *b) _pure_;
61 bool path_equal(const char *a, const char *b) _pure_;
62 bool path_equal_or_files_same(const char *a, const char *b, int flags);
63 char* path_join(const char *root, const char *path, const char *rest);
64 char* path_simplify(char *path, bool kill_dots);
66 static inline bool path_equal_ptr(const char *a, const char *b) {
67 return !!a == !!b && (!a || path_equal(a, b));
70 /* Note: the search terminates on the first NULL item. */
71 #define PATH_IN_SET(p, ...) \
74 bool _found = false; \
75 STRV_FOREACH(s, STRV_MAKE(__VA_ARGS__)) \
76 if (path_equal(p, *s)) { \
83 #if 0 /// UNNEEDED by elogind
84 #define PATH_STARTSWITH_SET(p, ...) \
87 bool _found = false; \
88 STRV_FOREACH(s, STRV_MAKE(__VA_ARGS__)) \
89 if (path_startswith(p, *s)) { \
96 int path_strv_make_absolute_cwd(char **l);
98 char** path_strv_resolve(char **l, const char *root);
99 char** path_strv_resolve_uniq(char **l, const char *root);
101 int find_binary(const char *name, char **filename);
103 #if 0 /// UNNEEDED by elogind
104 bool paths_check_timestamp(const char* const* paths, usec_t *paths_ts_usec, bool update);
106 int fsck_exists(const char *fstype);
107 int mkfs_exists(const char *fstype);
110 /* Iterates through the path prefixes of the specified path, going up
111 * the tree, to root. Also returns "" (and not "/"!) for the root
112 * directory. Excludes the specified directory itself */
113 #define PATH_FOREACH_PREFIX(prefix, path) \
114 for (char *_slash = ({ path_simplify(strcpy(prefix, path), false); streq(prefix, "/") ? NULL : strrchr(prefix, '/'); }); _slash && ((*_slash = 0), true); _slash = strrchr((prefix), '/'))
116 /* Same as PATH_FOREACH_PREFIX but also includes the specified path itself */
117 #define PATH_FOREACH_PREFIX_MORE(prefix, path) \
118 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), '/'))
120 char *prefix_root(const char *root, const char *path);
122 /* Similar to prefix_root(), but returns an alloca() buffer, or
123 * possibly a const pointer into the path parameter */
124 #define prefix_roota(root, path) \
126 const char* _path = (path), *_root = (root), *_ret; \
129 while (_path[0] == '/' && _path[1] == '/') \
131 if (empty_or_root(_root)) \
134 _l = strlen(_root) + 1 + strlen(_path) + 1; \
136 _p = stpcpy(_n, _root); \
137 while (_p > _n && _p[-1] == '/') \
139 if (_path[0] != '/') \
147 #if 0 /// UNNEEDED by elogind
148 int parse_path_argument_and_warn(const char *path, bool suppress_root, char **arg);
151 char* dirname_malloc(const char *path);
152 const char *last_path_component(const char *path);
154 bool filename_is_valid(const char *p) _pure_;
155 bool path_is_normalized(const char *p) _pure_;
157 char *file_in_same_dir(const char *path, const char *filename);
159 bool hidden_or_backup_file(const char *filename) _pure_;
161 #if 0 /// UNNEEDED by elogind
162 bool is_device_path(const char *path);
164 bool valid_device_node_path(const char *path);
165 bool valid_device_allow_pattern(const char *path);
167 int systemd_installation_has_version(const char *root, unsigned minimal_version);
170 bool dot_or_dot_dot(const char *path);
172 static inline const char *skip_dev_prefix(const char *p) {
175 /* Drop any /dev prefix if there is any */
177 e = path_startswith(p, "/dev/");
182 bool empty_or_root(const char *root);
183 static inline const char *empty_to_root(const char *path) {
184 return isempty(path) ? "/" : path;
188 PATH_CHECK_FATAL = 1 << 0, /* If not set, then error message is appended with 'ignoring'. */
189 PATH_CHECK_ABSOLUTE = 1 << 1,
190 PATH_CHECK_RELATIVE = 1 << 2,
193 int path_simplify_and_warn(char *path, unsigned flag, const char *unit, const char *filename, unsigned line, const char *lvalue);