1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
4 This file is part of systemd.
6 Copyright 2010 Lennart Poettering
8 systemd is free software; you can redistribute it and/or modify it
9 under the terms of the GNU Lesser General Public License as published by
10 the Free Software Foundation; either version 2.1 of the License, or
11 (at your option) any later version.
13 systemd is distributed in the hope that it will be useful, but
14 WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 Lesser General Public License for more details.
18 You should have received a copy of the GNU Lesser General Public License
19 along with systemd; If not, see <http://www.gnu.org/licenses/>.
32 static bool arg_quiet = false;
37 } arg_mode = ANY_VIRTUALIZATION;
39 static int help(void) {
41 printf("%s [OPTIONS...]\n\n"
42 "Detect execution in a virtualized environment.\n\n"
43 " -h --help Show this help\n"
44 " --version Show package version\n"
45 " -c --container Only detect whether we are run in a container\n"
46 " -v --vm Only detect whether we are run in a VM\n"
47 " -q --quiet Don't output anything, just set return value\n",
48 program_invocation_short_name);
53 static int parse_argv(int argc, char *argv[]) {
59 static const struct option options[] = {
60 { "help", no_argument, NULL, 'h' },
61 { "version", no_argument, NULL, ARG_VERSION },
62 { "container", no_argument, NULL, 'c' },
63 { "vm", optional_argument, NULL, 'v' },
64 { "quiet", no_argument, NULL, 'q' },
73 while ((c = getopt_long(argc, argv, "hqcv", options, NULL)) >= 0) {
84 puts(SYSTEMD_FEATURES);
92 arg_mode = ONLY_CONTAINER;
103 log_error("Unknown option code %c", c);
116 int main(int argc, char *argv[]) {
117 const char *id = NULL;
119 int retval = EXIT_SUCCESS;
121 /* This is mostly intended to be used for scripts which want
122 * to detect whether we are being run in a virtualized
123 * environment or not */
125 log_parse_environment();
128 r = parse_argv(argc, argv);
130 return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
134 case ANY_VIRTUALIZATION: {
137 v = detect_virtualization(&id);
139 log_error("Failed to check for virtualization: %s", strerror(-v));
143 retval = v != VIRTUALIZATION_NONE ? EXIT_SUCCESS : EXIT_FAILURE;
148 r = detect_container(&id);
150 log_error("Failed to check for container: %s", strerror(-r));
154 retval = r > 0 ? EXIT_SUCCESS : EXIT_FAILURE;
160 log_error("Failed to check for vm: %s", strerror(-r));
164 retval = r > 0 ? EXIT_SUCCESS : EXIT_FAILURE;
169 puts(id ? id : "none");