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authorLuke Shumaker <lukeshu@sbcglobal.net>2016-07-27 23:53:49 -0400
committerLuke Shumaker <lukeshu@sbcglobal.net>2016-07-27 23:53:49 -0400
commit8afdea4cef99e4e22d7e941cb779cefcb65d2284 (patch)
treee674a72577d988bb8ecbc14338913dd0e17cee09 /src/grp-helperunits/systemd-detect-virt
parent46565171d49814f56b340d8cd28d7a855cad8dee (diff)
./move.sh
Diffstat (limited to 'src/grp-helperunits/systemd-detect-virt')
-rw-r--r--src/grp-helperunits/systemd-detect-virt/Makefile36
-rw-r--r--src/grp-helperunits/systemd-detect-virt/detect-virt.c169
2 files changed, 205 insertions, 0 deletions
diff --git a/src/grp-helperunits/systemd-detect-virt/Makefile b/src/grp-helperunits/systemd-detect-virt/Makefile
new file mode 100644
index 0000000000..7b9b9f667b
--- /dev/null
+++ b/src/grp-helperunits/systemd-detect-virt/Makefile
@@ -0,0 +1,36 @@
+# -*- Mode: makefile; indent-tabs-mode: t -*-
+#
+# This file is part of systemd.
+#
+# Copyright 2010-2012 Lennart Poettering
+# Copyright 2010-2012 Kay Sievers
+# Copyright 2013 Zbigniew Jędrzejewski-Szmek
+# Copyright 2013 David Strauss
+# Copyright 2016 Luke Shumaker
+#
+# 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 $(dir $(lastword $(MAKEFILE_LIST)))/../../../config.mk
+include $(topsrcdir)/build-aux/Makefile.head.mk
+
+bin_PROGRAMS += systemd-detect-virt
+systemd_detect_virt_SOURCES = \
+ src/detect-virt/detect-virt.c
+
+systemd_detect_virt_LDADD = \
+ libshared.la
+
+INSTALL_EXEC_HOOKS += \
+ systemd-detect-virt-install-hook
+
+include $(topsrcdir)/build-aux/Makefile.tail.mk
diff --git a/src/grp-helperunits/systemd-detect-virt/detect-virt.c b/src/grp-helperunits/systemd-detect-virt/detect-virt.c
new file mode 100644
index 0000000000..5d51589a31
--- /dev/null
+++ b/src/grp-helperunits/systemd-detect-virt/detect-virt.c
@@ -0,0 +1,169 @@
+/***
+ 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 "util.h"
+#include "virt.h"
+
+static bool arg_quiet = false;
+static enum {
+ ANY_VIRTUALIZATION,
+ ONLY_VM,
+ ONLY_CONTAINER,
+ ONLY_CHROOT,
+} arg_mode = ANY_VIRTUALIZATION;
+
+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"
+ " -r --chroot Detect whether we are run in a chroot() environment\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
+ };
+
+ static const struct option options[] = {
+ { "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' },
+ { "quiet", no_argument, NULL, 'q' },
+ {}
+ };
+
+ int c;
+
+ assert(argc >= 0);
+ assert(argv);
+
+ while ((c = getopt_long(argc, argv, "hqcvr", options, NULL)) >= 0)
+
+ switch (c) {
+
+ case 'h':
+ help();
+ return 0;
+
+ case ARG_VERSION:
+ return version();
+
+ case 'q':
+ arg_quiet = true;
+ break;
+
+ case 'c':
+ arg_mode = ONLY_CONTAINER;
+ break;
+
+ case 'v':
+ arg_mode = ONLY_VM;
+ break;
+
+ case 'r':
+ arg_mode = ONLY_CHROOT;
+ break;
+
+ case '?':
+ return -EINVAL;
+
+ default:
+ assert_not_reached("Unhandled option");
+ }
+
+ if (optind < argc) {
+ log_error("%s takes no arguments.", program_invocation_short_name);
+ return -EINVAL;
+ }
+
+ return 1;
+}
+
+int main(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();
+
+ r = parse_argv(argc, argv);
+ if (r <= 0)
+ return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
+
+ 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;
+ }
+
+ break;
+
+ case ONLY_CONTAINER:
+ r = detect_container();
+ if (r < 0) {
+ log_error_errno(r, "Failed to check for container: %m");
+ return EXIT_FAILURE;
+ }
+
+ 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;
+
+ case ANY_VIRTUALIZATION:
+ default:
+ r = detect_virtualization();
+ if (r < 0) {
+ log_error_errno(r, "Failed to check for virtualization: %m");
+ return EXIT_FAILURE;
+ }
+
+ break;
+ }
+
+ if (!arg_quiet)
+ puts(virtualization_to_string(r));
+
+ return r != VIRTUALIZATION_NONE ? EXIT_SUCCESS : EXIT_FAILURE;
+}