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Diffstat (limited to 'src/basic/path-util.h')
| -rw-r--r-- | src/basic/path-util.h | 190 |
1 files changed, 190 insertions, 0 deletions
diff --git a/src/basic/path-util.h b/src/basic/path-util.h new file mode 100644 index 0000000..86c5a57 --- /dev/null +++ b/src/basic/path-util.h @@ -0,0 +1,190 @@ +/* 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 "strv.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_internal(const char *first, ...); +#define path_join(x, ...) path_join_internal(x, __VA_ARGS__, (const char*) -1) + +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, ...) \ + ({ \ + const char *_p = (p); \ + char *_found = NULL, **_i; \ + STRV_FOREACH(_i, STRV_MAKE(__VA_ARGS__)) { \ + _found = path_startswith(_p, *_i); \ + if (_found) \ + 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 = newa(char, _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); +int path_extract_filename(const char *p, char **ret); + +bool filename_is_valid(const char *p) _pure_; +bool path_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); |