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-rw-r--r--src/detect-virt/detect-virt.c172
1 files changed, 172 insertions, 0 deletions
diff --git a/src/detect-virt/detect-virt.c b/src/detect-virt/detect-virt.c
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index 0000000000..bbb9dfc19a
--- /dev/null
+++ b/src/detect-virt/detect-virt.c
@@ -0,0 +1,172 @@
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+/***
+ 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 "util.h"
+#include "virt.h"
+#include "build.h"
+
+static bool arg_quiet = false;
+static enum {
+ ANY_VIRTUALIZATION,
+ ONLY_VM,
+ ONLY_CONTAINER
+} arg_mode = ANY_VIRTUALIZATION;
+
+static int 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;
+}
+
+static int parse_argv(int argc, char *argv[]) {
+
+ enum {
+ ARG_VERSION = 0x100
+ };
+
+ 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 }
+ };
+
+ int c;
+
+ assert(argc >= 0);
+ assert(argv);
+
+ while ((c = getopt_long(argc, argv, "hqcv", options, NULL)) >= 0) {
+
+ switch (c) {
+
+ case 'h':
+ help();
+ return 0;
+
+ case ARG_VERSION:
+ puts(PACKAGE_STRING);
+ puts(DISTRIBUTION);
+ puts(SYSTEMD_FEATURES);
+ return 0;
+
+ case 'q':
+ arg_quiet = true;
+ break;
+
+ case 'c':
+ arg_mode = ONLY_CONTAINER;
+ break;
+
+ case 'v':
+ arg_mode = ONLY_VM;
+ break;
+
+ case '?':
+ return -EINVAL;
+
+ default:
+ log_error("Unknown option code %c", c);
+ return -EINVAL;
+ }
+ }
+
+ if (optind < argc) {
+ help();
+ return -EINVAL;
+ }
+
+ return 1;
+}
+
+int main(int argc, char *argv[]) {
+ const char *id = NULL;
+ int r;
+ int retval = EXIT_SUCCESS;
+
+ /* 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();
+
+ r = parse_argv(argc, argv);
+ if (r <= 0)
+ return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
+
+ 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));
+ return EXIT_FAILURE;
+ }
+
+ retval = v != VIRTUALIZATION_NONE ? EXIT_SUCCESS : EXIT_FAILURE;
+ break;
+ }
+
+ case ONLY_CONTAINER:
+ r = detect_container(&id);
+ if (r < 0) {
+ log_error("Failed to check for container: %s", strerror(-r));
+ return EXIT_FAILURE;
+ }
+
+ retval = r > 0 ? EXIT_SUCCESS : EXIT_FAILURE;
+ break;
+
+ case ONLY_VM:
+ r = detect_vm(&id);
+ if (r < 0) {
+ log_error("Failed to check for vm: %s", strerror(-r));
+ return EXIT_FAILURE;
+ }
+
+ retval = r > 0 ? EXIT_SUCCESS : EXIT_FAILURE;
+ break;
+ }
+
+ if (!arg_quiet)
+ puts(id ? id : "none");
+
+ return retval;
+}