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Diffstat (limited to 'src/detect-virt/detect-virt.c')
| -rw-r--r-- | src/detect-virt/detect-virt.c | 172 |
1 files changed, 172 insertions, 0 deletions
diff --git a/src/detect-virt/detect-virt.c b/src/detect-virt/detect-virt.c new file mode 100644 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; +} |