/**

 * Seccomp Library test program

 *

 * Copyright (c) 2013 Red Hat <pmoore@redhat.com>

 * Author: Paul Moore <paul@paul-moore.com>

 */

/*

 * This library is free software; you can redistribute it and/or modify it

 * under the terms of version 2.1 of the GNU Lesser General Public License as

 * published by the Free Software Foundation.

 *

 * This library 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 this library; if not, see <http://www.gnu.org/licenses>.

 */

#include <errno.h>

#include <fcntl.h>

#include <string.h>

#include <unistd.h>

#include <sys/types.h>

#include <sys/stat.h>

#include <seccomp.h>

#include "util.h"

int main(int argc, char *argv[])

{

	int rc;

	int fd;

	scmp_filter_ctx ctx = NULL;

	const char buf[] = "testing";

	ssize_t buf_len = strlen(buf);

	rc = util_action_parse(argv[1]);

	if (rc != SCMP_ACT_ALLOW) {

		rc = 1;

		goto out;

	}

	rc = util_trap_install();

	if (rc != 0)

		goto out;

	fd = open("/dev/null", O_WRONLY | O_CREAT, S_IRUSR | S_IWUSR);

	if (fd < 0) {

		rc = errno;

		goto out;

	}

	ctx = seccomp_init(SCMP_ACT_TRAP);

	if (ctx == NULL)

		return ENOMEM;

	rc = seccomp_rule_add(ctx, SCMP_ACT_ALLOW, SCMP_SYS(write), 1,

			      SCMP_A0(SCMP_CMP_EQ, fd));

	if (rc != 0)

		goto out;

	rc = seccomp_rule_add(ctx, SCMP_ACT_ALLOW, SCMP_SYS(close), 0);

	if (rc != 0)

		goto out;

	rc = seccomp_rule_add(ctx, SCMP_ACT_ALLOW, SCMP_SYS(rt_sigreturn), 0);

	if (rc != 0)

		goto out;

	rc = seccomp_rule_add(ctx, SCMP_ACT_ALLOW, SCMP_SYS(exit_group), 0);

	if (rc != 0)

		goto out;

	rc = seccomp_load(ctx);

	if (rc != 0)

		goto out;

	if (write(fd, buf, buf_len) < buf_len) {

		rc = errno;

		goto out;

	}

	if (close(fd) < 0) {

		rc = errno;

		goto out;

	}

	rc = 160;

out:

	seccomp_release(ctx);

	return (rc < 0 ? -rc : rc);

}