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/* SPDX-License-Identifier: LGPL-2.1-or-later */
#include <errno.h>
#include <getopt.h>
#include <stdio.h>
#include <stdlib.h>
#include "alloc-util.h"
#include "build.h"
#include "dissect-image.h"
#include "id128-util.h"
#include "log.h"
#include "machine-id-setup.h"
#include "main-func.h"
#include "mount-util.h"
#include "parse-argument.h"
#include "path-util.h"
#include "pretty-print.h"
#include "terminal-util.h"
static char *arg_root = NULL;
static char *arg_image = NULL;
static bool arg_commit = false;
static bool arg_print = false;
STATIC_DESTRUCTOR_REGISTER(arg_root, freep);
STATIC_DESTRUCTOR_REGISTER(arg_image, freep);
static int help(void) {
_cleanup_free_ char *link = NULL;
int r;
r = terminal_urlify_man("systemd-machine-id-setup", "1", &link);
if (r < 0)
return log_oom();
printf("%s [OPTIONS...]\n"
"\n%sInitialize /etc/machine-id from a random source.%s\n\n"
" -h --help Show this help\n"
" --version Show package version\n"
" --root=PATH Operate relative to root path\n"
" --image=PATH Operate relative to image file\n"
" --commit Commit transient ID\n"
" --print Print used machine ID\n"
"\nSee the %s for details.\n",
program_invocation_short_name,
ansi_highlight(),
ansi_normal(),
link);
return 0;
}
static int parse_argv(int argc, char *argv[]) {
enum {
ARG_VERSION = 0x100,
ARG_ROOT,
ARG_IMAGE,
ARG_COMMIT,
ARG_PRINT,
};
static const struct option options[] = {
{ "help", no_argument, NULL, 'h' },
{ "version", no_argument, NULL, ARG_VERSION },
{ "root", required_argument, NULL, ARG_ROOT },
{ "image", required_argument, NULL, ARG_IMAGE },
{ "commit", no_argument, NULL, ARG_COMMIT },
{ "print", no_argument, NULL, ARG_PRINT },
{}
};
int c, r;
assert(argc >= 0);
assert(argv);
while ((c = getopt_long(argc, argv, "h", options, NULL)) >= 0)
switch (c) {
case 'h':
return help();
case ARG_VERSION:
return version();
case ARG_ROOT:
r = parse_path_argument(optarg, true, &arg_root);
if (r < 0)
return r;
break;
case ARG_IMAGE:
r = parse_path_argument(optarg, false, &arg_image);
if (r < 0)
return r;
break;
case ARG_COMMIT:
arg_commit = true;
break;
case ARG_PRINT:
arg_print = true;
break;
case '?':
return -EINVAL;
default:
assert_not_reached();
}
if (optind < argc)
return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
"Extraneous arguments");
if (arg_image && arg_root)
return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "Please specify either --root= or --image=, the combination of both is not supported.");
return 1;
}
static int run(int argc, char *argv[]) {
_cleanup_(loop_device_unrefp) LoopDevice *loop_device = NULL;
_cleanup_(umount_and_rmdir_and_freep) char *unlink_dir = NULL;
sd_id128_t id;
int r;
log_parse_environment();
log_open();
r = parse_argv(argc, argv);
if (r <= 0)
return r;
if (arg_image) {
assert(!arg_root);
r = mount_image_privately_interactively(
arg_image,
DISSECT_IMAGE_REQUIRE_ROOT |
DISSECT_IMAGE_VALIDATE_OS |
DISSECT_IMAGE_RELAX_VAR_CHECK |
DISSECT_IMAGE_FSCK |
DISSECT_IMAGE_GROWFS,
&unlink_dir,
/* ret_dir_fd= */ NULL,
&loop_device);
if (r < 0)
return r;
arg_root = strdup(unlink_dir);
if (!arg_root)
return log_oom();
}
if (arg_commit) {
r = machine_id_commit(arg_root);
if (r < 0)
return r;
r = id128_read(arg_root, "/etc/machine-id", ID128_FORMAT_PLAIN, &id);
if (r < 0)
return log_error_errno(r, "Failed to read machine ID back: %m");
} else {
r = machine_id_setup(arg_root, false, SD_ID128_NULL, &id);
if (r < 0)
return r;
}
if (arg_print)
puts(SD_ID128_TO_STRING(id));
return 0;
}
DEFINE_MAIN_FUNCTION(run);
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