machine-id-setup-main.c revision fe970a8a30d611d454cb40025cfc32e29efa34e6
/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
/***
This file is part of systemd.
Copyright 2010 Lennart Poettering
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 <unistd.h>
#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 int help(void) {
printf("%s [OPTIONS...]\n\n"
"Initialize /etc/machine-id from a random source.\n\n"
" -h --help Show this help\n"
" --version Show package version\n"
" --root=ROOT Filesystem root\n",
program_invocation_short_name);
return 0;
}
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':
return help();
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_parse_environment();
log_open();
r = parse_argv(argc, argv);
if (r <= 0)
return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
return machine_id_setup(arg_root) < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
}