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eecd1362 LP |
1 | /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ |
2 | ||
3 | /*** | |
4 | This file is part of systemd. | |
5 | ||
6 | Copyright 2012 Lennart Poettering | |
7 | ||
8 | systemd is free software; you can redistribute it and/or modify it | |
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 | |
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 | |
16 | Lesser General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU Lesser General Public License | |
19 | along with systemd; If not, see <http://www.gnu.org/licenses/>. | |
20 | ***/ | |
21 | ||
22 | #include <getopt.h> | |
eecd1362 LP |
23 | #include <stdlib.h> |
24 | #include <stdio.h> | |
eecd1362 | 25 | #include <unistd.h> |
0fb0c56f | 26 | #include <fcntl.h> |
eecd1362 | 27 | |
0fb0c56f | 28 | #include "sd-bus.h" |
0fb0c56f TG |
29 | #include "bus-util.h" |
30 | #include "bus-error.h" | |
eecd1362 LP |
31 | #include "util.h" |
32 | #include "build.h" | |
33 | #include "strv.h" | |
6482f626 | 34 | #include "formats-util.h" |
eecd1362 | 35 | |
4943c1c9 | 36 | static const char* arg_what = "idle:sleep:shutdown"; |
eecd1362 LP |
37 | static const char* arg_who = NULL; |
38 | static const char* arg_why = "Unknown reason"; | |
ca5447c0 | 39 | static const char* arg_mode = NULL; |
eecd1362 LP |
40 | |
41 | static enum { | |
42 | ACTION_INHIBIT, | |
43 | ACTION_LIST | |
44 | } arg_action = ACTION_INHIBIT; | |
45 | ||
0fb0c56f TG |
46 | static int inhibit(sd_bus *bus, sd_bus_error *error) { |
47 | _cleanup_bus_message_unref_ sd_bus_message *reply = NULL; | |
3137e0bd | 48 | int r; |
0fb0c56f | 49 | int fd; |
eecd1362 | 50 | |
0fb0c56f | 51 | r = sd_bus_call_method( |
b9c26b41 | 52 | bus, |
eecd1362 LP |
53 | "org.freedesktop.login1", |
54 | "/org/freedesktop/login1", | |
55 | "org.freedesktop.login1.Manager", | |
b9c26b41 | 56 | "Inhibit", |
0fb0c56f | 57 | error, |
b9c26b41 | 58 | &reply, |
0fb0c56f | 59 | "ssss", arg_what, arg_who, arg_why, arg_mode); |
3137e0bd LP |
60 | if (r < 0) |
61 | return r; | |
eecd1362 | 62 | |
0fb0c56f TG |
63 | r = sd_bus_message_read_basic(reply, SD_BUS_TYPE_UNIX_FD, &fd); |
64 | if (r < 0) | |
5b30bef8 | 65 | return r; |
eecd1362 | 66 | |
ead34950 | 67 | r = fcntl(fd, F_DUPFD_CLOEXEC, 3); |
0fb0c56f TG |
68 | if (r < 0) |
69 | return -errno; | |
70 | ||
3137e0bd | 71 | return r; |
eecd1362 LP |
72 | } |
73 | ||
0fb0c56f TG |
74 | static int print_inhibitors(sd_bus *bus, sd_bus_error *error) { |
75 | _cleanup_bus_message_unref_ sd_bus_message *reply = NULL; | |
76 | const char *what, *who, *why, *mode; | |
77 | unsigned int uid, pid; | |
eecd1362 | 78 | unsigned n = 0; |
eecd1362 LP |
79 | int r; |
80 | ||
0fb0c56f | 81 | r = sd_bus_call_method( |
b9c26b41 | 82 | bus, |
eecd1362 LP |
83 | "org.freedesktop.login1", |
84 | "/org/freedesktop/login1", | |
85 | "org.freedesktop.login1.Manager", | |
b9c26b41 | 86 | "ListInhibitors", |
0fb0c56f | 87 | error, |
b9c26b41 | 88 | &reply, |
0fb0c56f | 89 | ""); |
3137e0bd | 90 | if (r < 0) |
4654e558 | 91 | return r; |
eecd1362 | 92 | |
0fb0c56f TG |
93 | r = sd_bus_message_enter_container(reply, SD_BUS_TYPE_ARRAY, "(ssssuu)"); |
94 | if (r < 0) | |
40be0704 | 95 | return bus_log_parse_error(r); |
eecd1362 | 96 | |
0fb0c56f | 97 | while ((r = sd_bus_message_read(reply, "(ssssuu)", &what, &who, &why, &mode, &uid, &pid)) > 0) { |
391a4f72 | 98 | _cleanup_free_ char *comm = NULL, *u = NULL; |
eecd1362 | 99 | |
ca5447c0 MM |
100 | if (arg_mode && !streq(mode, arg_mode)) |
101 | continue; | |
102 | ||
391a4f72 LP |
103 | get_process_comm(pid, &comm); |
104 | u = uid_to_name(uid); | |
105 | ||
de0671ee | 106 | printf(" Who: %s (UID "UID_FMT"/%s, PID "PID_FMT"/%s)\n" |
41330ddb MM |
107 | " What: %s\n" |
108 | " Why: %s\n" | |
109 | " Mode: %s\n\n", | |
de0671ee | 110 | who, uid, strna(u), pid, strna(comm), |
41330ddb MM |
111 | what, |
112 | why, | |
113 | mode); | |
eecd1362 | 114 | |
eecd1362 LP |
115 | n++; |
116 | } | |
0fb0c56f | 117 | if (r < 0) |
40be0704 | 118 | return bus_log_parse_error(r); |
0fb0c56f TG |
119 | |
120 | r = sd_bus_message_exit_container(reply); | |
121 | if (r < 0) | |
40be0704 | 122 | return bus_log_parse_error(r); |
eecd1362 | 123 | |
41330ddb | 124 | printf("%u inhibitors listed.\n", n); |
4654e558 | 125 | return 0; |
eecd1362 LP |
126 | } |
127 | ||
601185b4 | 128 | static void help(void) { |
eecd1362 | 129 | printf("%s [OPTIONS...] {COMMAND} ...\n\n" |
4943c1c9 | 130 | "Execute a process while inhibiting shutdown/sleep/idle.\n\n" |
eecd1362 LP |
131 | " -h --help Show this help\n" |
132 | " --version Show package version\n" | |
12a1309e LP |
133 | " --what=WHAT Operations to inhibit, colon separated list of:\n" |
134 | " shutdown, sleep, idle, handle-power-key,\n" | |
2f1bb513 СНА |
135 | " handle-suspend-key, handle-hibernate-key,\n" |
136 | " handle-lid-switch\n" | |
eecd1362 LP |
137 | " --who=STRING A descriptive string who is inhibiting\n" |
138 | " --why=STRING A descriptive string why is being inhibited\n" | |
139 | " --mode=MODE One of block or delay\n" | |
601185b4 ZJS |
140 | " --list List active inhibitors\n" |
141 | , program_invocation_short_name); | |
eecd1362 LP |
142 | } |
143 | ||
144 | static int parse_argv(int argc, char *argv[]) { | |
145 | ||
146 | enum { | |
147 | ARG_VERSION = 0x100, | |
148 | ARG_WHAT, | |
149 | ARG_WHO, | |
150 | ARG_WHY, | |
151 | ARG_MODE, | |
152 | ARG_LIST, | |
153 | }; | |
154 | ||
155 | static const struct option options[] = { | |
156 | { "help", no_argument, NULL, 'h' }, | |
157 | { "version", no_argument, NULL, ARG_VERSION }, | |
158 | { "what", required_argument, NULL, ARG_WHAT }, | |
159 | { "who", required_argument, NULL, ARG_WHO }, | |
160 | { "why", required_argument, NULL, ARG_WHY }, | |
161 | { "mode", required_argument, NULL, ARG_MODE }, | |
162 | { "list", no_argument, NULL, ARG_LIST }, | |
eb9da376 | 163 | {} |
eecd1362 LP |
164 | }; |
165 | ||
166 | int c; | |
167 | ||
168 | assert(argc >= 0); | |
169 | assert(argv); | |
170 | ||
601185b4 | 171 | while ((c = getopt_long(argc, argv, "+h", options, NULL)) >= 0) |
eecd1362 LP |
172 | |
173 | switch (c) { | |
174 | ||
175 | case 'h': | |
601185b4 ZJS |
176 | help(); |
177 | return 0; | |
eecd1362 LP |
178 | |
179 | case ARG_VERSION: | |
180 | puts(PACKAGE_STRING); | |
eecd1362 LP |
181 | puts(SYSTEMD_FEATURES); |
182 | return 0; | |
183 | ||
184 | case ARG_WHAT: | |
185 | arg_what = optarg; | |
186 | break; | |
187 | ||
188 | case ARG_WHO: | |
189 | arg_who = optarg; | |
190 | break; | |
191 | ||
192 | case ARG_WHY: | |
193 | arg_why = optarg; | |
194 | break; | |
195 | ||
196 | case ARG_MODE: | |
197 | arg_mode = optarg; | |
198 | break; | |
199 | ||
200 | case ARG_LIST: | |
201 | arg_action = ACTION_LIST; | |
202 | break; | |
203 | ||
eb9da376 | 204 | case '?': |
eecd1362 | 205 | return -EINVAL; |
eb9da376 LP |
206 | |
207 | default: | |
208 | assert_not_reached("Unhandled option"); | |
eecd1362 | 209 | } |
eecd1362 | 210 | |
d9130355 | 211 | if (arg_action == ACTION_INHIBIT && optind == argc) |
2f2343c6 KS |
212 | arg_action = ACTION_LIST; |
213 | ||
214 | else if (arg_action == ACTION_INHIBIT && optind >= argc) { | |
eecd1362 LP |
215 | log_error("Missing command line to execute."); |
216 | return -EINVAL; | |
217 | } | |
218 | ||
219 | return 1; | |
220 | } | |
221 | ||
222 | int main(int argc, char *argv[]) { | |
0fb0c56f | 223 | _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL; |
24996861 | 224 | _cleanup_bus_close_unref_ sd_bus *bus = NULL; |
5220a6f3 | 225 | int r; |
eecd1362 LP |
226 | |
227 | log_parse_environment(); | |
228 | log_open(); | |
229 | ||
230 | r = parse_argv(argc, argv); | |
45a7c6b5 | 231 | if (r < 0) |
0fb0c56f | 232 | return EXIT_FAILURE; |
45a7c6b5 LP |
233 | if (r == 0) |
234 | return EXIT_SUCCESS; | |
eecd1362 | 235 | |
76b54375 | 236 | r = sd_bus_default_system(&bus); |
0fb0c56f | 237 | if (r < 0) { |
da927ba9 | 238 | log_error_errno(r, "Failed to connect to bus: %m"); |
0fb0c56f | 239 | return EXIT_FAILURE; |
eecd1362 LP |
240 | } |
241 | ||
242 | if (arg_action == ACTION_LIST) { | |
243 | ||
244 | r = print_inhibitors(bus, &error); | |
245 | if (r < 0) { | |
0fb0c56f TG |
246 | log_error("Failed to list inhibitors: %s", bus_error_message(&error, -r)); |
247 | return EXIT_FAILURE; | |
eecd1362 LP |
248 | } |
249 | ||
250 | } else { | |
5220a6f3 LP |
251 | _cleanup_close_ int fd = -1; |
252 | _cleanup_free_ char *w = NULL; | |
eecd1362 LP |
253 | pid_t pid; |
254 | ||
255 | if (!arg_who) | |
256 | arg_who = w = strv_join(argv + optind, " "); | |
257 | ||
ca5447c0 MM |
258 | if (!arg_mode) |
259 | arg_mode = "block"; | |
260 | ||
eecd1362 | 261 | fd = inhibit(bus, &error); |
eecd1362 | 262 | if (fd < 0) { |
dcee0112 | 263 | log_error("Failed to inhibit: %s", bus_error_message(&error, fd)); |
0fb0c56f | 264 | return EXIT_FAILURE; |
eecd1362 LP |
265 | } |
266 | ||
267 | pid = fork(); | |
268 | if (pid < 0) { | |
56f64d95 | 269 | log_error_errno(errno, "Failed to fork: %m"); |
0fb0c56f | 270 | return EXIT_FAILURE; |
eecd1362 LP |
271 | } |
272 | ||
273 | if (pid == 0) { | |
274 | /* Child */ | |
275 | ||
77030bd6 LP |
276 | close_all_fds(NULL, 0); |
277 | ||
eecd1362 | 278 | execvp(argv[optind], argv + optind); |
56f64d95 | 279 | log_error_errno(errno, "Failed to execute %s: %m", argv[optind]); |
eecd1362 LP |
280 | _exit(EXIT_FAILURE); |
281 | } | |
282 | ||
820d3acf | 283 | r = wait_for_terminate_and_warn(argv[optind], pid, true); |
5220a6f3 | 284 | return r < 0 ? EXIT_FAILURE : r; |
eecd1362 LP |
285 | } |
286 | ||
0fb0c56f | 287 | return 0; |
eecd1362 | 288 | } |