-/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
-
+/* 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 <stdlib.h>
-#include <stdbool.h>
#include <errno.h>
-#include <string.h>
#include <getopt.h>
+#include <stdbool.h>
+#include <stdlib.h>
#include "util.h"
#include "virt.h"
-#include "build.h"
static bool arg_quiet = false;
static enum {
ANY_VIRTUALIZATION,
ONLY_VM,
- ONLY_CONTAINER
+ ONLY_CONTAINER,
+ ONLY_CHROOT,
+ ONLY_PRIVATE_USERS,
} arg_mode = ANY_VIRTUALIZATION;
-static int help(void) {
-
+static void help(void) {
printf("%s [OPTIONS...]\n\n"
"Detect execution in a virtualized environment.\n\n"
" -h --help Show this help\n"
" --version Show package version\n"
" -c --container Only detect whether we are run in a container\n"
" -v --vm Only detect whether we are run in a VM\n"
- " -q --quiet Don't output anything, just set return value\n",
- program_invocation_short_name);
-
- return 0;
+ " -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);
}
static int parse_argv(int argc, char *argv[]) {
enum {
- ARG_VERSION = 0x100
+ ARG_VERSION = 0x100,
+ ARG_PRIVATE_USERS,
};
static const struct option options[] = {
- { "help", no_argument, NULL, 'h' },
- { "version", no_argument, NULL, ARG_VERSION },
- { "container", no_argument, NULL, 'c' },
- { "vm", optional_argument, NULL, 'v' },
- { "quiet", no_argument, NULL, 'q' },
- { NULL, 0, NULL, 0 }
+ { "help", no_argument, NULL, 'h' },
+ { "version", no_argument, NULL, ARG_VERSION },
+ { "container", no_argument, NULL, 'c' },
+ { "vm", no_argument, NULL, 'v' },
+ { "chroot", no_argument, NULL, 'r' },
+ { "private-users", no_argument, NULL, ARG_PRIVATE_USERS },
+ { "quiet", no_argument, NULL, 'q' },
+ {}
};
int c;
assert(argc >= 0);
assert(argv);
- while ((c = getopt_long(argc, argv, "hqcv", options, NULL)) >= 0) {
+ while ((c = getopt_long(argc, argv, "hqcvr", options, NULL)) >= 0)
switch (c) {
return 0;
case ARG_VERSION:
- puts(PACKAGE_STRING);
- puts(SYSTEMD_FEATURES);
- return 0;
+ return version();
case 'q':
arg_quiet = true;
arg_mode = ONLY_CONTAINER;
break;
+ case ARG_PRIVATE_USERS:
+ arg_mode = ONLY_PRIVATE_USERS;
+ break;
+
case 'v':
arg_mode = ONLY_VM;
break;
+ case 'r':
+ arg_mode = ONLY_CHROOT;
+ break;
+
case '?':
return -EINVAL;
default:
- log_error("Unknown option code %c", c);
- return -EINVAL;
+ assert_not_reached("Unhandled option");
}
- }
if (optind < argc) {
- help();
+ log_error("%s takes no arguments.", program_invocation_short_name);
return -EINVAL;
}
}
int main(int argc, char *argv[]) {
- const char *id = NULL;
- int retval = EXIT_SUCCESS;
int r;
/* This is mostly intended to be used for scripts which want
switch (arg_mode) {
- case ANY_VIRTUALIZATION: {
- Virtualization v;
-
- v = detect_virtualization(&id);
- if (v < 0) {
- log_error("Failed to check for virtualization: %s", strerror(-v));
+ case ONLY_VM:
+ r = detect_vm();
+ if (r < 0) {
+ log_error_errno(r, "Failed to check for VM: %m");
return EXIT_FAILURE;
}
- retval = v != VIRTUALIZATION_NONE ? EXIT_SUCCESS : EXIT_FAILURE;
break;
- }
case ONLY_CONTAINER:
- r = detect_container(&id);
+ r = detect_container();
if (r < 0) {
- log_error("Failed to check for container: %s", strerror(-r));
+ log_error_errno(r, "Failed to check for container: %m");
return EXIT_FAILURE;
}
- retval = r > 0 ? EXIT_SUCCESS : EXIT_FAILURE;
break;
- case ONLY_VM:
- r = detect_vm(&id);
+ 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;
+
+ 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;
+
+ case ANY_VIRTUALIZATION:
+ default:
+ r = detect_virtualization();
if (r < 0) {
- log_error("Failed to check for vm: %s", strerror(-r));
+ log_error_errno(r, "Failed to check for virtualization: %m");
return EXIT_FAILURE;
}
- retval = r > 0 ? EXIT_SUCCESS : EXIT_FAILURE;
break;
}
if (!arg_quiet)
- puts(id ? id : "none");
+ puts(virtualization_to_string(r));
- return retval;
+ return r != VIRTUALIZATION_NONE ? EXIT_SUCCESS : EXIT_FAILURE;
}