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1 | /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ |
2 | ||
3 | /*** | |
4 | This file is part of systemd. | |
5 | ||
6 | Copyright 2010 Lennart Poettering | |
7 | ||
8 | systemd is free software; you can redistribute it and/or modify it | |
5430f7f2 LP |
9 | under the terms of the GNU Lesser General Public License as published by |
10 | the Free Software Foundation; either version 2.1 of the License, or | |
07faed4f LP |
11 | (at your option) any later version. |
12 | ||
13 | systemd is distributed in the hope that it will be useful, but | |
14 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
5430f7f2 | 16 | Lesser General Public License for more details. |
07faed4f | 17 | |
5430f7f2 | 18 | You should have received a copy of the GNU Lesser General Public License |
07faed4f LP |
19 | along with systemd; If not, see <http://www.gnu.org/licenses/>. |
20 | ***/ | |
21 | ||
22 | #include <stdlib.h> | |
23 | #include <stdbool.h> | |
24 | #include <errno.h> | |
25 | #include <string.h> | |
cac72f7a | 26 | #include <getopt.h> |
07faed4f LP |
27 | |
28 | #include "util.h" | |
b52aae1d | 29 | #include "virt.h" |
cac72f7a LP |
30 | #include "build.h" |
31 | ||
32 | static bool arg_quiet = false; | |
33 | static enum { | |
34 | ANY_VIRTUALIZATION, | |
35 | ONLY_VM, | |
36 | ONLY_CONTAINER | |
37 | } arg_mode = ANY_VIRTUALIZATION; | |
38 | ||
39 | static int help(void) { | |
40 | ||
41 | printf("%s [OPTIONS...]\n\n" | |
42 | "Detect execution in a virtualized environment.\n\n" | |
43 | " -h --help Show this help\n" | |
44 | " --version Show package version\n" | |
45 | " -c --container Only detect whether we are run in a container\n" | |
46 | " -v --vm Only detect whether we are run in a VM\n" | |
47 | " -q --quiet Don't output anything, just set return value\n", | |
48 | program_invocation_short_name); | |
49 | ||
50 | return 0; | |
51 | } | |
52 | ||
53 | static int parse_argv(int argc, char *argv[]) { | |
54 | ||
55 | enum { | |
56 | ARG_VERSION = 0x100 | |
57 | }; | |
58 | ||
59 | static const struct option options[] = { | |
60 | { "help", no_argument, NULL, 'h' }, | |
61 | { "version", no_argument, NULL, ARG_VERSION }, | |
62 | { "container", no_argument, NULL, 'c' }, | |
63 | { "vm", optional_argument, NULL, 'v' }, | |
8c32f014 | 64 | { "quiet", no_argument, NULL, 'q' }, |
cac72f7a LP |
65 | { NULL, 0, NULL, 0 } |
66 | }; | |
67 | ||
68 | int c; | |
69 | ||
70 | assert(argc >= 0); | |
71 | assert(argv); | |
72 | ||
73 | while ((c = getopt_long(argc, argv, "hqcv", options, NULL)) >= 0) { | |
74 | ||
75 | switch (c) { | |
76 | ||
77 | case 'h': | |
78 | help(); | |
79 | return 0; | |
80 | ||
81 | case ARG_VERSION: | |
82 | puts(PACKAGE_STRING); | |
cac72f7a LP |
83 | puts(SYSTEMD_FEATURES); |
84 | return 0; | |
85 | ||
86 | case 'q': | |
87 | arg_quiet = true; | |
88 | break; | |
89 | ||
90 | case 'c': | |
91 | arg_mode = ONLY_CONTAINER; | |
92 | break; | |
93 | ||
94 | case 'v': | |
95 | arg_mode = ONLY_VM; | |
96 | break; | |
97 | ||
98 | case '?': | |
99 | return -EINVAL; | |
100 | ||
101 | default: | |
102 | log_error("Unknown option code %c", c); | |
103 | return -EINVAL; | |
104 | } | |
105 | } | |
106 | ||
107 | if (optind < argc) { | |
108 | help(); | |
109 | return -EINVAL; | |
110 | } | |
111 | ||
112 | return 1; | |
113 | } | |
07faed4f LP |
114 | |
115 | int main(int argc, char *argv[]) { | |
cac72f7a | 116 | const char *id = NULL; |
018ef268 | 117 | int retval = EXIT_SUCCESS; |
0fb533a5 | 118 | int r; |
07faed4f LP |
119 | |
120 | /* This is mostly intended to be used for scripts which want | |
121 | * to detect whether we are being run in a virtualized | |
122 | * environment or not */ | |
123 | ||
cac72f7a LP |
124 | log_parse_environment(); |
125 | log_open(); | |
126 | ||
127 | r = parse_argv(argc, argv); | |
128 | if (r <= 0) | |
129 | return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS; | |
130 | ||
131 | switch (arg_mode) { | |
132 | ||
133 | case ANY_VIRTUALIZATION: { | |
134 | Virtualization v; | |
135 | ||
136 | v = detect_virtualization(&id); | |
137 | if (v < 0) { | |
138 | log_error("Failed to check for virtualization: %s", strerror(-v)); | |
139 | return EXIT_FAILURE; | |
140 | } | |
141 | ||
142 | retval = v != VIRTUALIZATION_NONE ? EXIT_SUCCESS : EXIT_FAILURE; | |
143 | break; | |
144 | } | |
145 | ||
146 | case ONLY_CONTAINER: | |
147 | r = detect_container(&id); | |
148 | if (r < 0) { | |
149 | log_error("Failed to check for container: %s", strerror(-r)); | |
150 | return EXIT_FAILURE; | |
151 | } | |
152 | ||
153 | retval = r > 0 ? EXIT_SUCCESS : EXIT_FAILURE; | |
154 | break; | |
155 | ||
156 | case ONLY_VM: | |
157 | r = detect_vm(&id); | |
158 | if (r < 0) { | |
159 | log_error("Failed to check for vm: %s", strerror(-r)); | |
160 | return EXIT_FAILURE; | |
161 | } | |
162 | ||
163 | retval = r > 0 ? EXIT_SUCCESS : EXIT_FAILURE; | |
164 | break; | |
07faed4f LP |
165 | } |
166 | ||
ac0d6edf LP |
167 | if (!arg_quiet) |
168 | puts(id ? id : "none"); | |
07faed4f | 169 | |
cac72f7a | 170 | return retval; |
07faed4f | 171 | } |