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authorDidier Roche <didrocks@ubuntu.com>2014-11-24 09:54:18 +0100
committerLennart Poettering <lennart@poettering.net>2014-12-03 03:41:19 +0100
commit3fb394369ccd6787f8f883e0f81dc7f35cb1ec51 (patch)
treebd937a34fa38a7299c8c79aec985386966921881 /src/machine-id-commit/machine-id-commit.c
parent979ef53a268d6f54a309fc5c6015df5d4accbbd5 (diff)
machine-id-commit: Introduce machine-id-commit binary
This binary enables to commit transient machine-id on disk if it becomes writable.
Diffstat (limited to 'src/machine-id-commit/machine-id-commit.c')
-rw-r--r--src/machine-id-commit/machine-id-commit.c105
1 files changed, 105 insertions, 0 deletions
diff --git a/src/machine-id-commit/machine-id-commit.c b/src/machine-id-commit/machine-id-commit.c
new file mode 100644
index 0000000000..c7e4de8889
--- /dev/null
+++ b/src/machine-id-commit/machine-id-commit.c
@@ -0,0 +1,105 @@
+/*-*- 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 <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 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;
+}