/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ #pragma once /*** This file is part of systemd. Copyright 2010-2012 Lennart Poettering systemd is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version. systemd is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with systemd; If not, see <http://www.gnu.org/licenses/>. ***/ #include <stdbool.h> #include "macro.h" #include "time-util.h" #define DEFAULT_PATH_NORMAL "/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin" #define DEFAULT_PATH_SPLIT_USR DEFAULT_PATH_NORMAL ":/sbin:/bin" #ifdef HAVE_SPLIT_USR # define DEFAULT_PATH DEFAULT_PATH_SPLIT_USR #else # define DEFAULT_PATH DEFAULT_PATH_NORMAL #endif bool is_path(const char *p) _pure_; char** path_split_and_make_absolute(const char *p); int path_get_parent(const char *path, char **parent); bool path_is_absolute(const char *p) _pure_; char* path_make_absolute(const char *p, const char *prefix); char* path_make_absolute_cwd(const char *p); int path_make_relative(const char *from_dir, const char *to_path, char **_r); char* path_kill_slashes(char *path); 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); char* path_join(const char *root, const char *path, const char *rest); char** path_strv_make_absolute_cwd(char **l); char** path_strv_resolve(char **l, const char *prefix); char** path_strv_resolve_uniq(char **l, const char *prefix); int fd_is_mount_point(int fd, const char *filename, int flags); int path_is_mount_point(const char *path, int flags); int path_is_read_only_fs(const char *path); int path_is_os_tree(const char *path); int find_binary(const char *name, bool local, char **filename); bool paths_check_timestamp(const char* const* paths, usec_t *paths_ts_usec, bool update); int fsck_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_kill_slashes(strcpy(prefix, path)); 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_kill_slashes(strcpy(prefix, path)); 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 (isempty(_root) || path_equal(_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; \ })