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07faed4f LP |
1 | /*** |
2 | This file is part of systemd. | |
3 | ||
4 | Copyright 2010 Lennart Poettering | |
5 | ||
6 | systemd is free software; you can redistribute it and/or modify it | |
5430f7f2 LP |
7 | under the terms of the GNU Lesser General Public License as published by |
8 | the Free Software Foundation; either version 2.1 of the License, or | |
07faed4f LP |
9 | (at your option) any later version. |
10 | ||
11 | systemd is distributed in the hope that it will be useful, but | |
12 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
5430f7f2 | 14 | Lesser General Public License for more details. |
07faed4f | 15 | |
5430f7f2 | 16 | You should have received a copy of the GNU Lesser General Public License |
07faed4f LP |
17 | along with systemd; If not, see <http://www.gnu.org/licenses/>. |
18 | ***/ | |
19 | ||
07faed4f | 20 | #include <errno.h> |
cac72f7a | 21 | #include <getopt.h> |
3f6fd1ba LP |
22 | #include <stdbool.h> |
23 | #include <stdlib.h> | |
07faed4f LP |
24 | |
25 | #include "util.h" | |
b52aae1d | 26 | #include "virt.h" |
cac72f7a LP |
27 | |
28 | static bool arg_quiet = false; | |
29 | static enum { | |
30 | ANY_VIRTUALIZATION, | |
31 | ONLY_VM, | |
d21be5ff LP |
32 | ONLY_CONTAINER, |
33 | ONLY_CHROOT, | |
cac72f7a LP |
34 | } arg_mode = ANY_VIRTUALIZATION; |
35 | ||
601185b4 | 36 | static void help(void) { |
cac72f7a LP |
37 | printf("%s [OPTIONS...]\n\n" |
38 | "Detect execution in a virtualized environment.\n\n" | |
39 | " -h --help Show this help\n" | |
40 | " --version Show package version\n" | |
41 | " -c --container Only detect whether we are run in a container\n" | |
42 | " -v --vm Only detect whether we are run in a VM\n" | |
d21be5ff | 43 | " -r --chroot Detect whether we are run in a chroot() environment\n" |
601185b4 ZJS |
44 | " -q --quiet Don't output anything, just set return value\n" |
45 | , program_invocation_short_name); | |
cac72f7a LP |
46 | } |
47 | ||
48 | static int parse_argv(int argc, char *argv[]) { | |
49 | ||
50 | enum { | |
51 | ARG_VERSION = 0x100 | |
52 | }; | |
53 | ||
54 | static const struct option options[] = { | |
55 | { "help", no_argument, NULL, 'h' }, | |
56 | { "version", no_argument, NULL, ARG_VERSION }, | |
57 | { "container", no_argument, NULL, 'c' }, | |
d21be5ff LP |
58 | { "vm", no_argument, NULL, 'v' }, |
59 | { "chroot", no_argument, NULL, 'r' }, | |
8c32f014 | 60 | { "quiet", no_argument, NULL, 'q' }, |
eb9da376 | 61 | {} |
cac72f7a LP |
62 | }; |
63 | ||
64 | int c; | |
65 | ||
66 | assert(argc >= 0); | |
67 | assert(argv); | |
68 | ||
d21be5ff | 69 | while ((c = getopt_long(argc, argv, "hqcvr", options, NULL)) >= 0) |
cac72f7a LP |
70 | |
71 | switch (c) { | |
72 | ||
73 | case 'h': | |
601185b4 ZJS |
74 | help(); |
75 | return 0; | |
cac72f7a LP |
76 | |
77 | case ARG_VERSION: | |
3f6fd1ba | 78 | return version(); |
cac72f7a LP |
79 | |
80 | case 'q': | |
81 | arg_quiet = true; | |
82 | break; | |
83 | ||
84 | case 'c': | |
85 | arg_mode = ONLY_CONTAINER; | |
86 | break; | |
87 | ||
88 | case 'v': | |
89 | arg_mode = ONLY_VM; | |
90 | break; | |
91 | ||
d21be5ff LP |
92 | case 'r': |
93 | arg_mode = ONLY_CHROOT; | |
94 | break; | |
95 | ||
cac72f7a LP |
96 | case '?': |
97 | return -EINVAL; | |
98 | ||
99 | default: | |
eb9da376 | 100 | assert_not_reached("Unhandled option"); |
cac72f7a | 101 | } |
cac72f7a LP |
102 | |
103 | if (optind < argc) { | |
9e6a555a | 104 | log_error("%s takes no arguments.", program_invocation_short_name); |
cac72f7a LP |
105 | return -EINVAL; |
106 | } | |
107 | ||
108 | return 1; | |
109 | } | |
07faed4f LP |
110 | |
111 | int main(int argc, char *argv[]) { | |
9e6a555a | 112 | int r; |
07faed4f LP |
113 | |
114 | /* This is mostly intended to be used for scripts which want | |
115 | * to detect whether we are being run in a virtualized | |
116 | * environment or not */ | |
117 | ||
cac72f7a LP |
118 | log_parse_environment(); |
119 | log_open(); | |
120 | ||
121 | r = parse_argv(argc, argv); | |
122 | if (r <= 0) | |
123 | return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS; | |
124 | ||
125 | switch (arg_mode) { | |
126 | ||
75f86906 LP |
127 | case ONLY_VM: |
128 | r = detect_vm(); | |
129 | if (r < 0) { | |
9e6a555a | 130 | log_error_errno(r, "Failed to check for VM: %m"); |
cac72f7a LP |
131 | return EXIT_FAILURE; |
132 | } | |
133 | ||
cac72f7a | 134 | break; |
cac72f7a LP |
135 | |
136 | case ONLY_CONTAINER: | |
75f86906 | 137 | r = detect_container(); |
cac72f7a | 138 | if (r < 0) { |
da927ba9 | 139 | log_error_errno(r, "Failed to check for container: %m"); |
cac72f7a LP |
140 | return EXIT_FAILURE; |
141 | } | |
142 | ||
cac72f7a LP |
143 | break; |
144 | ||
d21be5ff LP |
145 | case ONLY_CHROOT: |
146 | r = running_in_chroot(); | |
147 | if (r < 0) { | |
148 | log_error_errno(r, "Failed to check for chroot() environment: %m"); | |
149 | return EXIT_FAILURE; | |
150 | } | |
151 | ||
152 | return r ? EXIT_SUCCESS : EXIT_FAILURE; | |
153 | ||
75f86906 LP |
154 | case ANY_VIRTUALIZATION: |
155 | default: | |
156 | r = detect_virtualization(); | |
cac72f7a | 157 | if (r < 0) { |
75f86906 | 158 | log_error_errno(r, "Failed to check for virtualization: %m"); |
cac72f7a LP |
159 | return EXIT_FAILURE; |
160 | } | |
161 | ||
cac72f7a | 162 | break; |
07faed4f LP |
163 | } |
164 | ||
ac0d6edf | 165 | if (!arg_quiet) |
75f86906 LP |
166 | puts(virtualization_to_string(r)); |
167 | ||
9e6a555a | 168 | return r != VIRTUALIZATION_NONE ? EXIT_SUCCESS : EXIT_FAILURE; |
07faed4f | 169 | } |