diff options
Diffstat (limited to 'src/systemd-detect-virt')
| -rw-r--r-- | src/systemd-detect-virt/Makefile | 36 | ||||
| -rw-r--r-- | src/systemd-detect-virt/detect-virt.c | 169 |
2 files changed, 205 insertions, 0 deletions
diff --git a/src/systemd-detect-virt/Makefile b/src/systemd-detect-virt/Makefile new file mode 100644 index 0000000000..0ac37341ea --- /dev/null +++ b/src/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/systemd-detect-virt/detect-virt.c b/src/systemd-detect-virt/detect-virt.c new file mode 100644 index 0000000000..5d51589a31 --- /dev/null +++ b/src/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; +} |