/*
 * Copyright (c) 2021 Omar Polo <op@omarpolo.com>
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

/*
 * What's the deal with landlock?  While distro with linux >= 5.13
 * have the struct declarations, libc wrappers are missing.  The
 * sample landlock code provided by the authors includes these "shims"
 * in their example for the landlock API until libc provides them.
 *
 * Linux is such a mess sometimes.  /rant
 */

#ifndef LANDLOCK_SHIM_H
#define LANDLOCK_SHIM_H

#include <linux/landlock.h>
#include <linux/prctl.h>

#include <sys/prctl.h>
#include <sys/stat.h>
#include <sys/syscall.h>

#include <unistd.h>

#ifndef landlock_create_ruleset
static inline int
landlock_create_ruleset(const struct landlock_ruleset_attr *attr, size_t size,
    __u32 flags)
{
	return syscall(__NR_landlock_create_ruleset, attr, size, flags);
}
#endif

#ifndef landlock_add_rule
static inline int
landlock_add_rule(int ruleset_fd, enum landlock_rule_type type,
    const void *attr, __u32 flags)
{
	return syscall(__NR_landlock_add_rule, ruleset_fd, type, attr, flags);
}
#endif

#ifndef landlock_restrict_self
static inline int
landlock_restrict_self(int ruleset_fd, __u32 flags)
{
	return syscall(__NR_landlock_restrict_self, ruleset_fd, flags);
}
#endif

#endif	/* LANDLOCK_SHIM_H */