ee48dbd55f
Allow for overriding all other machine-ids which may be present on the system using a kernel command line systemd.machine_id or --machine-id= option. This is especially useful for network booted systems where the machine-id needs to be static, or for containers where a specific machine-id is wanted.
121 lines
3.3 KiB
C
121 lines
3.3 KiB
C
/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
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/***
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This file is part of systemd.
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Copyright 2010 Lennart Poettering
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systemd is free software; you can redistribute it and/or modify it
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under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or
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(at your option) any later version.
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systemd is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with systemd; If not, see <http://www.gnu.org/licenses/>.
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***/
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#include <errno.h>
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#include <getopt.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include "log.h"
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#include "machine-id-setup.h"
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#include "path-util.h"
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#include "util.h"
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static char *arg_root = NULL;
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static bool arg_commit = false;
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static void help(void) {
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printf("%s [OPTIONS...]\n\n"
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"Initialize /etc/machine-id from a random source.\n\n"
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" -h --help Show this help\n"
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" --version Show package version\n"
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" --root=ROOT Filesystem root\n"
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" --commit Commit transient ID\n"
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, program_invocation_short_name);
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}
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static int parse_argv(int argc, char *argv[]) {
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enum {
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ARG_VERSION = 0x100,
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ARG_ROOT,
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ARG_COMMIT,
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};
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static const struct option options[] = {
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{ "help", no_argument, NULL, 'h' },
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{ "version", no_argument, NULL, ARG_VERSION },
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{ "root", required_argument, NULL, ARG_ROOT },
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{ "commit", no_argument, NULL, ARG_COMMIT },
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{}
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};
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int c, r;
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assert(argc >= 0);
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assert(argv);
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while ((c = getopt_long(argc, argv, "hqcv", options, NULL)) >= 0)
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switch (c) {
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case 'h':
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help();
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return 0;
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case ARG_VERSION:
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return version();
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case ARG_ROOT:
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r = parse_path_argument_and_warn(optarg, true, &arg_root);
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if (r < 0)
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return r;
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break;
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case ARG_COMMIT:
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arg_commit = true;
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break;
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case '?':
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return -EINVAL;
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default:
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assert_not_reached("Unhandled option");
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}
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if (optind < argc) {
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log_error("Extraneous arguments");
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return -EINVAL;
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}
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return 1;
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}
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int main(int argc, char *argv[]) {
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int r;
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log_parse_environment();
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log_open();
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r = parse_argv(argc, argv);
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if (r <= 0)
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goto finish;
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if (arg_commit)
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r = machine_id_commit(arg_root);
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else
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r = machine_id_setup(arg_root, SD_ID128_NULL);
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finish:
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free(arg_root);
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return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
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}
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