/**

 * Syscall resolver

 *

 * Copyright (c) 2012 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 <stdlib.h>

#include <stdio.h>

#include <ctype.h>

#include <string.h>

#include <unistd.h>

#include <seccomp.h>

/**

 * Print the usage information to stderr and exit

 * @param program the name of the current program being invoked

 *

 * Print the usage information and exit with EINVAL.

 *

 */

static void exit_usage(const char *program)

{

	fprintf(stderr,

		"usage: %s [-h] [-a <arch>] [-t] <name>|<number>\n",

		program);

	exit(EINVAL);

}

/**

 * main

 */

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

{

	int opt;

	int translate = 0;

	uint32_t arch;

	int sys_num;

	const char *sys_name;

	arch = seccomp_arch_native();

	/* parse the command line */

	while ((opt = getopt(argc, argv, "a:ht")) > 0) {

		switch (opt) {

		case 'a':

			arch = seccomp_arch_resolve_name(optarg);

			if (arch == 0)

				exit_usage(argv[0]);

			break;

		case 't':

			translate = 1;

			break;

		case 'h':

		default:

			/* usage information */

			exit_usage(argv[0]);

		}

	}

	/* sanity checks */

	if (optind >= argc)

		exit_usage(argv[0]);

	/* perform the syscall lookup */

	if (isdigit(argv[optind][0]) || argv[optind][0] == '-') {

		sys_num = atoi(argv[optind]);

		sys_name = seccomp_syscall_resolve_num_arch(arch, sys_num);

		printf("%s\n", (sys_name ? sys_name : "UNKNOWN"));

	} else if (translate) {

		sys_num = seccomp_syscall_resolve_name_rewrite(arch,

							       argv[optind]);

		printf("%d\n", sys_num);

	} else {

		sys_num = seccomp_syscall_resolve_name_arch(arch, argv[optind]);

		printf("%d\n", sys_num);

	}

	return 0;

}