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1 /*
2 * Copyright (c) 2021 Omar Polo <op@omarpolo.com>
3 *
4 * Permission to use, copy, modify, and distribute this software for any
5 * purpose with or without fee is hereby granted, provided that the above
6 * copyright notice and this permission notice appear in all copies.
7 *
8 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
15 */
17 /*
18 * What's the deal with landlock? While distro with linux >= 5.13
19 * have the struct declarations, libc wrappers are missing. The
20 * sample landlock code provided by the authors includes these "shims"
21 * in their example for the landlock API until libc provides them.
22 *
23 * Linux is such a mess sometimes. /rant
24 */
26 #ifndef LANDLOCK_SHIM_H
27 #define LANDLOCK_SHIM_H
29 #include <linux/landlock.h>
30 #include <linux/prctl.h>
32 #include <sys/prctl.h>
33 #include <sys/stat.h>
34 #include <sys/syscall.h>
36 #include <unistd.h>
38 #ifndef landlock_create_ruleset
39 static inline int
40 landlock_create_ruleset(const struct landlock_ruleset_attr *attr, size_t size,
41 __u32 flags)
42 {
43 return syscall(__NR_landlock_create_ruleset, attr, size, flags);
44 }
45 #endif
47 #ifndef landlock_add_rule
48 static inline int
49 landlock_add_rule(int ruleset_fd, enum landlock_rule_type type,
50 const void *attr, __u32 flags)
51 {
52 return syscall(__NR_landlock_add_rule, ruleset_fd, type, attr, flags);
53 }
54 #endif
56 #ifndef landlock_restrict_self
57 static inline int
58 landlock_restrict_self(int ruleset_fd, __u32 flags)
59 {
60 return syscall(__NR_landlock_restrict_self, ruleset_fd, flags);
61 }
62 #endif
64 #endif /* LANDLOCK_SHIM_H */