/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ /*** This file is part of systemd. Copyright 2014 Didier Roche systemd is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version. systemd 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 systemd; If not, see <http://www.gnu.org/licenses/>. ***/ #include <stdlib.h> #include <stdio.h> #include <getopt.h> #include <errno.h> #include "machine-id-setup.h" #include "log.h" #include "build.h" static const char *arg_root = ""; static void help(void) { printf("%s [OPTIONS...]\n\n" "Commit a transient /etc/machine-id on disk if writable.\n\n" " -h --help Show this help\n" " --version Show package version\n" " --root=ROOT Filesystem root\n", program_invocation_short_name); } static int parse_argv(int argc, char *argv[]) { enum { ARG_VERSION = 0x100, ARG_ROOT, }; static const struct option options[] = { { "help", no_argument, NULL, 'h' }, { "version", no_argument, NULL, ARG_VERSION }, { "root", required_argument, NULL, ARG_ROOT }, {} }; int c; assert(argc >= 0); assert(argv); while ((c = getopt_long(argc, argv, "hqcv", options, NULL)) >= 0) switch (c) { case 'h': help(); return 0; case ARG_VERSION: puts(PACKAGE_STRING); puts(SYSTEMD_FEATURES); return 0; case ARG_ROOT: arg_root = optarg; break; case '?': return -EINVAL; default: assert_not_reached("Unhandled option"); } if (optind < argc) { log_error("Extraneous arguments"); return -EINVAL; } return 1; } int main(int argc, char *argv[]) { int r; log_set_target(LOG_TARGET_AUTO); log_parse_environment(); log_open(); r = parse_argv(argc, argv); if (r <= 0) return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS; return machine_id_commit(arg_root) < 0 ? EXIT_FAILURE : EXIT_SUCCESS; }