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Systemd/src/basic/path-util.h
Lennart Poettering 0c69794138 tree-wide: remove Lennart's copyright lines 
These lines are generally out-of-date, incomplete and unnecessary. With
SPDX and git repository much more accurate and fine grained information
about licensing and authorship is available, hence let's drop the
per-file copyright notice. Of course, removing copyright lines of others
is problematic, hence this commit only removes my own lines and leaves
all others untouched. It might be nicer if sooner or later those could
go away too, making git the only and accurate source of authorship
information.
2018-06-14 10:20:20 +02:00

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/* SPDX-License-Identifier: LGPL-2.1+ */
#pragma once
#include <alloca.h>
#include <stdbool.h>
#include <stddef.h>
#include "macro.h"
#include "string-util.h"
#include "time-util.h"
#define PATH_SPLIT_SBIN_BIN(x) x "sbin:" x "bin"
#define PATH_SPLIT_SBIN_BIN_NULSTR(x) x "sbin\0" x "bin\0"
#define PATH_NORMAL_SBIN_BIN(x) x "bin"
#define PATH_NORMAL_SBIN_BIN_NULSTR(x) x "bin\0"
#if HAVE_SPLIT_BIN
# define PATH_SBIN_BIN(x) PATH_SPLIT_SBIN_BIN(x)
# define PATH_SBIN_BIN_NULSTR(x) PATH_SPLIT_SBIN_BIN_NULSTR(x)
#else
# define PATH_SBIN_BIN(x) PATH_NORMAL_SBIN_BIN(x)
# define PATH_SBIN_BIN_NULSTR(x) PATH_NORMAL_SBIN_BIN_NULSTR(x)
#endif
#define DEFAULT_PATH_NORMAL PATH_SBIN_BIN("/usr/local/") ":" PATH_SBIN_BIN("/usr/")
#define DEFAULT_PATH_NORMAL_NULSTR PATH_SBIN_BIN_NULSTR("/usr/local/") PATH_SBIN_BIN_NULSTR("/usr/")
#define DEFAULT_PATH_SPLIT_USR DEFAULT_PATH_NORMAL ":" PATH_SBIN_BIN("/")
#define DEFAULT_PATH_SPLIT_USR_NULSTR DEFAULT_PATH_NORMAL_NULSTR PATH_SBIN_BIN_NULSTR("/")
#define DEFAULT_PATH_COMPAT PATH_SPLIT_SBIN_BIN("/usr/local/") ":" PATH_SPLIT_SBIN_BIN("/usr/") ":" PATH_SPLIT_SBIN_BIN("/")
#if HAVE_SPLIT_USR
# define DEFAULT_PATH DEFAULT_PATH_SPLIT_USR
# define DEFAULT_PATH_NULSTR DEFAULT_PATH_SPLIT_USR_NULSTR
#else
# define DEFAULT_PATH DEFAULT_PATH_NORMAL
# define DEFAULT_PATH_NULSTR DEFAULT_PATH_NORMAL_NULSTR
#endif
bool is_path(const char *p) _pure_;
int path_split_and_make_absolute(const char *p, char ***ret);
bool path_is_absolute(const char *p) _pure_;
char* path_make_absolute(const char *p, const char *prefix);
int safe_getcwd(char **ret);
int path_make_absolute_cwd(const char *p, char **ret);
int path_make_relative(const char *from_dir, const char *to_path, char **_r);
char* path_startswith(const char *path, const char *prefix) _pure_;
int path_compare(const char *a, const char *b) _pure_;
bool path_equal(const char *a, const char *b) _pure_;
bool path_equal_or_files_same(const char *a, const char *b, int flags);
char* path_join(const char *root, const char *path, const char *rest);
char* path_simplify(char *path, bool kill_dots);
static inline bool path_equal_ptr(const char *a, const char *b) {
return !!a == !!b && (!a || path_equal(a, b));
}
/* Note: the search terminates on the first NULL item. */
#define PATH_IN_SET(p, ...) \
({ \
char **s; \
bool _found = false; \
STRV_FOREACH(s, STRV_MAKE(__VA_ARGS__)) \
if (path_equal(p, *s)) { \
_found = true; \
break; \
} \
_found; \
})
#define PATH_STARTSWITH_SET(p, ...) \
({ \
char **s; \
bool _found = false; \
STRV_FOREACH(s, STRV_MAKE(__VA_ARGS__)) \
if (path_startswith(p, *s)) { \
_found = true; \
break; \
} \
_found; \
})
int path_strv_make_absolute_cwd(char **l);
char** path_strv_resolve(char **l, const char *root);
char** path_strv_resolve_uniq(char **l, const char *root);
int find_binary(const char *name, char **filename);
bool paths_check_timestamp(const char* const* paths, usec_t *paths_ts_usec, bool update);
int fsck_exists(const char *fstype);
int mkfs_exists(const char *fstype);
/* Iterates through the path prefixes of the specified path, going up
* the tree, to root. Also returns "" (and not "/"!) for the root
* directory. Excludes the specified directory itself */
#define PATH_FOREACH_PREFIX(prefix, path) \
for (char *_slash = ({ path_simplify(strcpy(prefix, path), false); streq(prefix, "/") ? NULL : strrchr(prefix, '/'); }); _slash && ((*_slash = 0), true); _slash = strrchr((prefix), '/'))
/* Same as PATH_FOREACH_PREFIX but also includes the specified path itself */
#define PATH_FOREACH_PREFIX_MORE(prefix, path) \
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), '/'))
char *prefix_root(const char *root, const char *path);
/* Similar to prefix_root(), but returns an alloca() buffer, or
* possibly a const pointer into the path parameter */
#define prefix_roota(root, path) \
({ \
const char* _path = (path), *_root = (root), *_ret; \
char *_p, *_n; \
size_t _l; \
while (_path[0] == '/' && _path[1] == '/') \
_path ++; \
if (empty_or_root(_root)) \
_ret = _path; \
else { \
_l = strlen(_root) + 1 + strlen(_path) + 1; \
_n = alloca(_l); \
_p = stpcpy(_n, _root); \
while (_p > _n && _p[-1] == '/') \
_p--; \
if (_path[0] != '/') \
*(_p++) = '/'; \
strcpy(_p, _path); \
_ret = _n; \
} \
_ret; \
})
int parse_path_argument_and_warn(const char *path, bool suppress_root, char **arg);
char* dirname_malloc(const char *path);
const char *last_path_component(const char *path);
bool filename_is_valid(const char *p) _pure_;
bool path_is_normalized(const char *p) _pure_;
char *file_in_same_dir(const char *path, const char *filename);
bool hidden_or_backup_file(const char *filename) _pure_;
bool is_device_path(const char *path);
bool valid_device_node_path(const char *path);
bool valid_device_allow_pattern(const char *path);
int systemd_installation_has_version(const char *root, unsigned minimal_version);
bool dot_or_dot_dot(const char *path);
static inline const char *skip_dev_prefix(const char *p) {
const char *e;
/* Drop any /dev prefix if there is any */
e = path_startswith(p, "/dev/");
return e ?: p;
}
bool empty_or_root(const char *root);
static inline const char *empty_to_root(const char *path) {
return isempty(path) ? "/" : path;
}
enum {
PATH_CHECK_FATAL = 1 << 0, /* If not set, then error message is appended with 'ignoring'. */
PATH_CHECK_ABSOLUTE = 1 << 1,
PATH_CHECK_RELATIVE = 1 << 2,
};
int path_simplify_and_warn(char *path, unsigned flag, const char *unit, const char *filename, unsigned line, const char *lvalue);
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