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) {
83 puts(SYSTEMD_FEATURES);
91 arg_mode = ONLY_CONTAINER;
102 log_error("Unknown option code %c", c);
115 int main(int argc, char *argv[]) {
116 const char *id = NULL;
118 int retval = EXIT_SUCCESS;
120 /* This is mostly intended to be used for scripts which want
121 * to detect whether we are being run in a virtualized
122 * environment or not */
124 log_parse_environment();
127 r = parse_argv(argc, argv);
129 return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
133 case ANY_VIRTUALIZATION: {
136 v = detect_virtualization(&id);
138 log_error("Failed to check for virtualization: %s", strerror(-v));
142 retval = v != VIRTUALIZATION_NONE ? EXIT_SUCCESS : EXIT_FAILURE;
147 r = detect_container(&id);
149 log_error("Failed to check for container: %s", strerror(-r));
153 retval = r > 0 ? EXIT_SUCCESS : EXIT_FAILURE;
159 log_error("Failed to check for vm: %s", strerror(-r));
163 retval = r > 0 ? EXIT_SUCCESS : EXIT_FAILURE;
168 puts(id ? id : "none");