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f4351959 LP |
1 | /* SPDX-License-Identifier: LGPL-2.1-or-later */ |
2 | #pragma once | |
3 | ||
4 | #include <dirent.h> | |
5 | #include <stdio.h> | |
6 | ||
7 | #include "stat-util.h" | |
8 | ||
8f47f880 | 9 | typedef enum ChaseSymlinksFlags { |
f4351959 LP |
10 | CHASE_PREFIX_ROOT = 1 << 0, /* The specified path will be prefixed by the specified root before beginning the iteration */ |
11 | CHASE_NONEXISTENT = 1 << 1, /* It's OK if the path doesn't actually exist. */ | |
12 | CHASE_NO_AUTOFS = 1 << 2, /* Return -EREMOTE if autofs mount point found */ | |
13 | CHASE_SAFE = 1 << 3, /* Return -EPERM if we ever traverse from unprivileged to privileged files or directories */ | |
14 | CHASE_TRAIL_SLASH = 1 << 4, /* Any trailing slash will be preserved */ | |
15 | CHASE_STEP = 1 << 5, /* Just execute a single step of the normalization */ | |
16 | CHASE_NOFOLLOW = 1 << 6, /* Do not follow the path's right-most component. With ret_fd, when the path's | |
17 | * right-most component refers to symlink, return O_PATH fd of the symlink. */ | |
18 | CHASE_WARN = 1 << 7, /* Emit an appropriate warning when an error is encountered */ | |
8f47f880 | 19 | } ChaseSymlinksFlags; |
f4351959 LP |
20 | |
21 | bool unsafe_transition(const struct stat *a, const struct stat *b); | |
22 | ||
23 | /* How many iterations to execute before returning -ELOOP */ | |
24 | #define CHASE_SYMLINKS_MAX 32 | |
25 | ||
8f47f880 | 26 | int chase_symlinks(const char *path_with_prefix, const char *root, ChaseSymlinksFlags chase_flags, char **ret_path, int *ret_fd); |
f4351959 | 27 | |
8f47f880 LP |
28 | int chase_symlinks_and_open(const char *path, const char *root, ChaseSymlinksFlags chase_flags, int open_flags, char **ret_path); |
29 | int chase_symlinks_and_opendir(const char *path, const char *root, ChaseSymlinksFlags chase_flags, char **ret_path, DIR **ret_dir); | |
30 | int chase_symlinks_and_stat(const char *path, const char *root, ChaseSymlinksFlags chase_flags, char **ret_path, struct stat *ret_stat, int *ret_fd); | |
2b2caea2 | 31 | int chase_symlinks_and_access(const char *path, const char *root, ChaseSymlinksFlags chase_flags, int access_mode, char **ret_path, int *ret_fd); |
8f47f880 | 32 | int chase_symlinks_and_fopen_unlocked(const char *path, const char *root, ChaseSymlinksFlags chase_flags, const char *open_flags, char **ret_path, FILE **ret_file); |