/* SPDX-License-Identifier: LGPL-2.1+ */
-/***
- This file is part of systemd.
-
- Copyright 2010 Lennart Poettering
-
- 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 <errno.h>
#include <getopt.h>
#include <stdbool.h>
#include <stdlib.h>
+#include "alloc-util.h"
+#include "main-func.h"
+#include "pretty-print.h"
+#include "string-table.h"
#include "util.h"
#include "virt.h"
ONLY_PRIVATE_USERS,
} arg_mode = ANY_VIRTUALIZATION;
-static void help(void) {
+static int help(void) {
+ _cleanup_free_ char *link = NULL;
+ int r;
+
+ r = terminal_urlify_man("systemd-detect-virt", "1", &link);
+ if (r < 0)
+ return log_oom();
+
printf("%s [OPTIONS...]\n\n"
"Detect execution in a virtualized environment.\n\n"
" -h --help Show this help\n"
" -r --chroot Detect whether we are run in a chroot() environment\n"
" --private-users Only detect whether we are running in a user namespace\n"
" -q --quiet Don't output anything, just set return value\n"
- , program_invocation_short_name);
+ " --list List all known and detectable types of virtualization\n"
+ "\nSee the %s for details.\n"
+ , program_invocation_short_name
+ , link
+ );
+
+ return 0;
}
static int parse_argv(int argc, char *argv[]) {
enum {
ARG_VERSION = 0x100,
ARG_PRIVATE_USERS,
+ ARG_LIST,
};
static const struct option options[] = {
{ "chroot", no_argument, NULL, 'r' },
{ "private-users", no_argument, NULL, ARG_PRIVATE_USERS },
{ "quiet", no_argument, NULL, 'q' },
+ { "list", no_argument, NULL, ARG_LIST },
{}
};
switch (c) {
case 'h':
- help();
- return 0;
+ return help();
case ARG_VERSION:
return version();
arg_mode = ONLY_CHROOT;
break;
+ case ARG_LIST:
+ DUMP_STRING_TABLE(virtualization, int, _VIRTUALIZATION_MAX);
+ return 0;
+
case '?':
return -EINVAL;
assert_not_reached("Unhandled option");
}
- if (optind < argc) {
- log_error("%s takes no arguments.", program_invocation_short_name);
- return -EINVAL;
- }
+ if (optind < argc)
+ return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
+ "%s takes no arguments.",
+ program_invocation_short_name);
return 1;
}
-int main(int argc, char *argv[]) {
+static int run(int argc, char *argv[]) {
int r;
/* This is mostly intended to be used for scripts which want
* to detect whether we are being run in a virtualized
* environment or not */
- log_parse_environment();
- log_open();
+ log_setup_cli();
r = parse_argv(argc, argv);
if (r <= 0)
- return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
+ return r;
switch (arg_mode) {
-
case ONLY_VM:
r = detect_vm();
- if (r < 0) {
- log_error_errno(r, "Failed to check for VM: %m");
- return EXIT_FAILURE;
- }
-
+ if (r < 0)
+ return log_error_errno(r, "Failed to check for VM: %m");
break;
case ONLY_CONTAINER:
r = detect_container();
- if (r < 0) {
- log_error_errno(r, "Failed to check for container: %m");
- return EXIT_FAILURE;
- }
-
+ if (r < 0)
+ return log_error_errno(r, "Failed to check for container: %m");
break;
case ONLY_CHROOT:
r = running_in_chroot();
- if (r < 0) {
- log_error_errno(r, "Failed to check for chroot() environment: %m");
- return EXIT_FAILURE;
- }
-
- return r ? EXIT_SUCCESS : EXIT_FAILURE;
+ if (r < 0)
+ return log_error_errno(r, "Failed to check for chroot() environment: %m");
+ return !r;
case ONLY_PRIVATE_USERS:
r = running_in_userns();
- if (r < 0) {
- log_error_errno(r, "Failed to check for user namespace: %m");
- return EXIT_FAILURE;
- }
-
- return r ? EXIT_SUCCESS : EXIT_FAILURE;
+ if (r < 0)
+ return log_error_errno(r, "Failed to check for user namespace: %m");
+ return !r;
case ANY_VIRTUALIZATION:
default:
r = detect_virtualization();
- if (r < 0) {
- log_error_errno(r, "Failed to check for virtualization: %m");
- return EXIT_FAILURE;
- }
-
+ if (r < 0)
+ return log_error_errno(r, "Failed to check for virtualization: %m");
break;
}
if (!arg_quiet)
puts(virtualization_to_string(r));
- return r != VIRTUALIZATION_NONE ? EXIT_SUCCESS : EXIT_FAILURE;
+ return r == VIRTUALIZATION_NONE;
}
+
+DEFINE_MAIN_FUNCTION_WITH_POSITIVE_FAILURE(run);
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