173 lines
4.9 KiB
C
173 lines
4.9 KiB
C
/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
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/***
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This file is part of systemd.
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Copyright 2010 Lennart Poettering
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systemd is free software; you can redistribute it and/or modify it
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under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or
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(at your option) any later version.
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systemd is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with systemd; If not, see <http://www.gnu.org/licenses/>.
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***/
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#include <stdlib.h>
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#include <stdbool.h>
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#include <errno.h>
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#include <string.h>
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#include <getopt.h>
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#include "util.h"
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#include "virt.h"
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#include "build.h"
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static bool arg_quiet = false;
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static enum {
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ANY_VIRTUALIZATION,
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ONLY_VM,
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ONLY_CONTAINER
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} arg_mode = ANY_VIRTUALIZATION;
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static int help(void) {
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printf("%s [OPTIONS...]\n\n"
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"Detect execution in a virtualized environment.\n\n"
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" -h --help Show this help\n"
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" --version Show package version\n"
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" -c --container Only detect whether we are run in a container\n"
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" -v --vm Only detect whether we are run in a VM\n"
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" -q --quiet Don't output anything, just set return value\n",
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program_invocation_short_name);
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return 0;
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}
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static int parse_argv(int argc, char *argv[]) {
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enum {
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ARG_VERSION = 0x100
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};
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static const struct option options[] = {
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{ "help", no_argument, NULL, 'h' },
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{ "version", no_argument, NULL, ARG_VERSION },
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{ "container", no_argument, NULL, 'c' },
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{ "vm", optional_argument, NULL, 'v' },
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{ "quiet", no_argument, NULL, 'q' },
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{ NULL, 0, NULL, 0 }
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};
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int c;
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assert(argc >= 0);
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assert(argv);
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while ((c = getopt_long(argc, argv, "hqcv", options, NULL)) >= 0) {
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switch (c) {
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case 'h':
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help();
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return 0;
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case ARG_VERSION:
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puts(PACKAGE_STRING);
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puts(DISTRIBUTION);
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puts(SYSTEMD_FEATURES);
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return 0;
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case 'q':
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arg_quiet = true;
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break;
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case 'c':
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arg_mode = ONLY_CONTAINER;
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break;
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case 'v':
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arg_mode = ONLY_VM;
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break;
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case '?':
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return -EINVAL;
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default:
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log_error("Unknown option code %c", c);
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return -EINVAL;
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}
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}
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if (optind < argc) {
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help();
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return -EINVAL;
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}
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return 1;
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}
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int main(int argc, char *argv[]) {
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const char *id = NULL;
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int r;
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int retval = EXIT_SUCCESS;
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/* This is mostly intended to be used for scripts which want
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* to detect whether we are being run in a virtualized
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* environment or not */
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log_parse_environment();
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log_open();
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r = parse_argv(argc, argv);
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if (r <= 0)
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return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
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switch (arg_mode) {
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case ANY_VIRTUALIZATION: {
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Virtualization v;
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v = detect_virtualization(&id);
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if (v < 0) {
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log_error("Failed to check for virtualization: %s", strerror(-v));
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return EXIT_FAILURE;
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}
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retval = v != VIRTUALIZATION_NONE ? EXIT_SUCCESS : EXIT_FAILURE;
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break;
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}
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case ONLY_CONTAINER:
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r = detect_container(&id);
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if (r < 0) {
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log_error("Failed to check for container: %s", strerror(-r));
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return EXIT_FAILURE;
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}
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retval = r > 0 ? EXIT_SUCCESS : EXIT_FAILURE;
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break;
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case ONLY_VM:
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r = detect_vm(&id);
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if (r < 0) {
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log_error("Failed to check for vm: %s", strerror(-r));
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return EXIT_FAILURE;
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}
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retval = r > 0 ? EXIT_SUCCESS : EXIT_FAILURE;
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break;
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}
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if (!arg_quiet)
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puts(id ? id : "none");
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return retval;
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}
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