0c69794138
These lines are generally out-of-date, incomplete and unnecessary. With SPDX and git repository much more accurate and fine grained information about licensing and authorship is available, hence let's drop the per-file copyright notice. Of course, removing copyright lines of others is problematic, hence this commit only removes my own lines and leaves all others untouched. It might be nicer if sooner or later those could go away too, making git the only and accurate source of authorship information.
178 lines
5.4 KiB
C
178 lines
5.4 KiB
C
/* SPDX-License-Identifier: LGPL-2.1+ */
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#include <errno.h>
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#include <getopt.h>
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#include <stdbool.h>
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#include <stdlib.h>
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#include "string-table.h"
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#include "util.h"
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#include "virt.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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ONLY_CHROOT,
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ONLY_PRIVATE_USERS,
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} arg_mode = ANY_VIRTUALIZATION;
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static void 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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" -r --chroot Detect whether we are run in a chroot() environment\n"
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" --private-users Only detect whether we are running in a user namespace\n"
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" -q --quiet Don't output anything, just set return value\n"
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" --list List all known and detectable types of virtualization\n"
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, program_invocation_short_name);
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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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ARG_PRIVATE_USERS,
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ARG_LIST,
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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", no_argument, NULL, 'v' },
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{ "chroot", no_argument, NULL, 'r' },
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{ "private-users", no_argument, NULL, ARG_PRIVATE_USERS },
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{ "quiet", no_argument, NULL, 'q' },
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{ "list", no_argument, NULL, ARG_LIST },
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{}
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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, "hqcvr", 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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return version();
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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 ARG_PRIVATE_USERS:
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arg_mode = ONLY_PRIVATE_USERS;
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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 'r':
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arg_mode = ONLY_CHROOT;
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break;
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case ARG_LIST:
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DUMP_STRING_TABLE(virtualization, int, _VIRTUALIZATION_MAX);
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return 0;
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case '?':
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return -EINVAL;
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default:
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assert_not_reached("Unhandled option");
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}
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if (optind < argc) {
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log_error("%s takes no arguments.", program_invocation_short_name);
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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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int r;
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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 ONLY_VM:
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r = detect_vm();
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if (r < 0) {
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log_error_errno(r, "Failed to check for VM: %m");
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return EXIT_FAILURE;
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}
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break;
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case ONLY_CONTAINER:
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r = detect_container();
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if (r < 0) {
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log_error_errno(r, "Failed to check for container: %m");
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return EXIT_FAILURE;
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}
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break;
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case ONLY_CHROOT:
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r = running_in_chroot();
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if (r < 0) {
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log_error_errno(r, "Failed to check for chroot() environment: %m");
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return EXIT_FAILURE;
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}
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return r ? EXIT_SUCCESS : EXIT_FAILURE;
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case ONLY_PRIVATE_USERS:
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r = running_in_userns();
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if (r < 0) {
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log_error_errno(r, "Failed to check for user namespace: %m");
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return EXIT_FAILURE;
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}
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return r ? EXIT_SUCCESS : EXIT_FAILURE;
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case ANY_VIRTUALIZATION:
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default:
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r = detect_virtualization();
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if (r < 0) {
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log_error_errno(r, "Failed to check for virtualization: %m");
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return EXIT_FAILURE;
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}
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break;
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}
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if (!arg_quiet)
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puts(virtualization_to_string(r));
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return r != VIRTUALIZATION_NONE ? EXIT_SUCCESS : EXIT_FAILURE;
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}
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