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authorLennart Poettering <lennart@poettering.net>2012-04-12 14:45:50 +0200
committerLennart Poettering <lennart@poettering.net>2012-04-12 14:46:41 +0200
commitcac72f7a02aca7c4162f0a489b102cde341b5bef (patch)
tree8cf18b8dd0e1ce93a21370af575fe44d0c81d34b
parentec1a9f88f2a91d9358c254ea8098b4e9190fb146 (diff)
detect-virt: beef up tool considerably
-rw-r--r--src/detect-virt.c139
1 files changed, 131 insertions, 8 deletions
diff --git a/src/detect-virt.c b/src/detect-virt.c
index b3d8fb53a4..bdcd27df6e 100644
--- a/src/detect-virt.c
+++ b/src/detect-virt.c
@@ -23,26 +23,149 @@
#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", required_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[]) {
- Virtualization r;
- const char *id;
+ const char *id = NULL;
+ int retval, 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 */
- r = detect_virtualization(&id);
- if (r < 0) {
- log_error("Failed to check for virtualization: %s", strerror(-r));
- return EXIT_FAILURE;
+ 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 (r > 0)
+ if (id && !arg_quiet)
puts(id);
- return r > 0 ? EXIT_SUCCESS : EXIT_FAILURE;
+ return retval;
}