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db9ecf05 | 1 | /* SPDX-License-Identifier: LGPL-2.1-or-later */ |
eecd1362 | 2 | |
3f6fd1ba | 3 | #include <fcntl.h> |
eecd1362 | 4 | #include <getopt.h> |
eecd1362 | 5 | #include <stdio.h> |
3f6fd1ba | 6 | #include <stdlib.h> |
eecd1362 LP |
7 | #include <unistd.h> |
8 | ||
0fb0c56f | 9 | #include "sd-bus.h" |
3f6fd1ba | 10 | |
b5efdb8a | 11 | #include "alloc-util.h" |
d6b4d1c7 | 12 | #include "build.h" |
0fb0c56f | 13 | #include "bus-error.h" |
d962e737 | 14 | #include "bus-locator.h" |
3f6fd1ba | 15 | #include "bus-util.h" |
3ffd4af2 | 16 | #include "fd-util.h" |
a9426617 | 17 | #include "format-table.h" |
f97b34a6 | 18 | #include "format-util.h" |
5e332028 | 19 | #include "main-func.h" |
f3c9133c | 20 | #include "pager.h" |
294bf0c3 | 21 | #include "pretty-print.h" |
0b452006 | 22 | #include "process-util.h" |
ce30c8dc | 23 | #include "signal-util.h" |
3f6fd1ba | 24 | #include "strv.h" |
353b2baa | 25 | #include "terminal-util.h" |
b1d4f8e1 | 26 | #include "user-util.h" |
eecd1362 | 27 | |
4943c1c9 | 28 | static const char* arg_what = "idle:sleep:shutdown"; |
eecd1362 LP |
29 | static const char* arg_who = NULL; |
30 | static const char* arg_why = "Unknown reason"; | |
ca5447c0 | 31 | static const char* arg_mode = NULL; |
0221d68a | 32 | static PagerFlags arg_pager_flags = 0; |
a9426617 | 33 | static bool arg_legend = true; |
eecd1362 LP |
34 | |
35 | static enum { | |
36 | ACTION_INHIBIT, | |
37 | ACTION_LIST | |
38 | } arg_action = ACTION_INHIBIT; | |
39 | ||
0fb0c56f | 40 | static int inhibit(sd_bus *bus, sd_bus_error *error) { |
4afd3348 | 41 | _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL; |
3137e0bd | 42 | int r; |
0fb0c56f | 43 | int fd; |
eecd1362 | 44 | |
d962e737 | 45 | r = bus_call_method(bus, bus_login_mgr, "Inhibit", error, &reply, "ssss", arg_what, arg_who, arg_why, arg_mode); |
3137e0bd LP |
46 | if (r < 0) |
47 | return r; | |
eecd1362 | 48 | |
0fb0c56f TG |
49 | r = sd_bus_message_read_basic(reply, SD_BUS_TYPE_UNIX_FD, &fd); |
50 | if (r < 0) | |
5b30bef8 | 51 | return r; |
eecd1362 | 52 | |
7c248223 | 53 | return RET_NERRNO(fcntl(fd, F_DUPFD_CLOEXEC, 3)); |
eecd1362 LP |
54 | } |
55 | ||
0e6872cd LP |
56 | static int print_inhibitors(sd_bus *bus) { |
57 | _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; | |
4afd3348 | 58 | _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL; |
a9426617 | 59 | _cleanup_(table_unrefp) Table *table = NULL; |
eecd1362 LP |
60 | int r; |
61 | ||
384c2c32 | 62 | pager_open(arg_pager_flags); |
f3c9133c | 63 | |
6ce68c7c | 64 | r = bus_call_method(bus, bus_login_mgr, "ListInhibitors", &error, &reply, NULL); |
3137e0bd | 65 | if (r < 0) |
0e6872cd | 66 | return log_error_errno(r, "Could not get active inhibitors: %s", bus_error_message(&error, r)); |
eecd1362 | 67 | |
9969b542 | 68 | table = table_new("who", "uid", "user", "pid", "comm", "what", "why", "mode"); |
a9426617 LP |
69 | if (!table) |
70 | return log_oom(); | |
71 | ||
72 | /* If there's not enough space, shorten the "WHY" column, as it's little more than an explaining comment. */ | |
73 | (void) table_set_weight(table, TABLE_HEADER_CELL(6), 20); | |
619b0c07 | 74 | (void) table_set_maximum_width(table, TABLE_HEADER_CELL(0), columns()/2); |
a9426617 | 75 | |
0fb0c56f TG |
76 | r = sd_bus_message_enter_container(reply, SD_BUS_TYPE_ARRAY, "(ssssuu)"); |
77 | if (r < 0) | |
40be0704 | 78 | return bus_log_parse_error(r); |
eecd1362 | 79 | |
a9426617 | 80 | for (;;) { |
391a4f72 | 81 | _cleanup_free_ char *comm = NULL, *u = NULL; |
a9426617 LP |
82 | const char *what, *who, *why, *mode; |
83 | uint32_t uid, pid; | |
84 | ||
85 | r = sd_bus_message_read(reply, "(ssssuu)", &what, &who, &why, &mode, &uid, &pid); | |
86 | if (r < 0) | |
87 | return bus_log_parse_error(r); | |
88 | if (r == 0) | |
89 | break; | |
eecd1362 | 90 | |
ca5447c0 MM |
91 | if (arg_mode && !streq(mode, arg_mode)) |
92 | continue; | |
93 | ||
d7d74854 | 94 | (void) pid_get_comm(pid, &comm); |
391a4f72 LP |
95 | u = uid_to_name(uid); |
96 | ||
a9426617 LP |
97 | r = table_add_many(table, |
98 | TABLE_STRING, who, | |
805f2df1 | 99 | TABLE_UID, (uid_t) uid, |
a9426617 | 100 | TABLE_STRING, strna(u), |
805f2df1 | 101 | TABLE_PID, (pid_t) pid, |
a9426617 LP |
102 | TABLE_STRING, strna(comm), |
103 | TABLE_STRING, what, | |
104 | TABLE_STRING, why, | |
105 | TABLE_STRING, mode); | |
106 | if (r < 0) | |
bd17fa8c | 107 | return table_log_add_error(r); |
eecd1362 | 108 | } |
0fb0c56f TG |
109 | |
110 | r = sd_bus_message_exit_container(reply); | |
111 | if (r < 0) | |
40be0704 | 112 | return bus_log_parse_error(r); |
eecd1362 | 113 | |
2413a0fa | 114 | if (!table_isempty(table)) { |
ef1e0b9a | 115 | r = table_set_sort(table, (size_t) 1, (size_t) 0, (size_t) 5, (size_t) 6); |
a9426617 | 116 | if (r < 0) |
df83eb54 | 117 | return table_log_sort_error(r); |
a9426617 LP |
118 | |
119 | table_set_header(table, arg_legend); | |
120 | ||
121 | r = table_print(table, NULL); | |
122 | if (r < 0) | |
4b6607d9 | 123 | return table_log_print_error(r); |
a9426617 LP |
124 | } |
125 | ||
126 | if (arg_legend) { | |
2413a0fa | 127 | if (table_isempty(table)) |
a9426617 | 128 | printf("No inhibitors.\n"); |
2413a0fa MY |
129 | else |
130 | printf("\n%zu inhibitors listed.\n", table_get_rows(table) - 1); | |
a9426617 LP |
131 | } |
132 | ||
4654e558 | 133 | return 0; |
eecd1362 LP |
134 | } |
135 | ||
37ec0fdd LP |
136 | static int help(void) { |
137 | _cleanup_free_ char *link = NULL; | |
138 | int r; | |
139 | ||
140 | r = terminal_urlify_man("systemd-inhibit", "1", &link); | |
141 | if (r < 0) | |
142 | return log_oom(); | |
143 | ||
353b2baa LP |
144 | printf("%s [OPTIONS...] COMMAND ...\n" |
145 | "\n%sExecute a process while inhibiting shutdown/sleep/idle.%s\n\n" | |
eecd1362 LP |
146 | " -h --help Show this help\n" |
147 | " --version Show package version\n" | |
f3c9133c | 148 | " --no-pager Do not pipe output into a pager\n" |
a9426617 | 149 | " --no-legend Do not show the headers and footers\n" |
12a1309e LP |
150 | " --what=WHAT Operations to inhibit, colon separated list of:\n" |
151 | " shutdown, sleep, idle, handle-power-key,\n" | |
2f1bb513 СНА |
152 | " handle-suspend-key, handle-hibernate-key,\n" |
153 | " handle-lid-switch\n" | |
eecd1362 LP |
154 | " --who=STRING A descriptive string who is inhibiting\n" |
155 | " --why=STRING A descriptive string why is being inhibited\n" | |
156 | " --mode=MODE One of block or delay\n" | |
601185b4 | 157 | " --list List active inhibitors\n" |
bc556335 DDM |
158 | "\nSee the %s for details.\n", |
159 | program_invocation_short_name, | |
160 | ansi_highlight(), | |
161 | ansi_normal(), | |
162 | link); | |
37ec0fdd LP |
163 | |
164 | return 0; | |
eecd1362 LP |
165 | } |
166 | ||
167 | static int parse_argv(int argc, char *argv[]) { | |
168 | ||
169 | enum { | |
170 | ARG_VERSION = 0x100, | |
171 | ARG_WHAT, | |
172 | ARG_WHO, | |
173 | ARG_WHY, | |
174 | ARG_MODE, | |
175 | ARG_LIST, | |
f3c9133c | 176 | ARG_NO_PAGER, |
a9426617 | 177 | ARG_NO_LEGEND, |
eecd1362 LP |
178 | }; |
179 | ||
180 | static const struct option options[] = { | |
181 | { "help", no_argument, NULL, 'h' }, | |
182 | { "version", no_argument, NULL, ARG_VERSION }, | |
183 | { "what", required_argument, NULL, ARG_WHAT }, | |
184 | { "who", required_argument, NULL, ARG_WHO }, | |
185 | { "why", required_argument, NULL, ARG_WHY }, | |
186 | { "mode", required_argument, NULL, ARG_MODE }, | |
187 | { "list", no_argument, NULL, ARG_LIST }, | |
f3c9133c | 188 | { "no-pager", no_argument, NULL, ARG_NO_PAGER }, |
a9426617 | 189 | { "no-legend", no_argument, NULL, ARG_NO_LEGEND }, |
eb9da376 | 190 | {} |
eecd1362 LP |
191 | }; |
192 | ||
193 | int c; | |
194 | ||
195 | assert(argc >= 0); | |
196 | assert(argv); | |
197 | ||
ef9c12b1 YW |
198 | /* Resetting to 0 forces the invocation of an internal initialization routine of getopt_long() |
199 | * that checks for GNU extensions in optstring ('-' or '+' at the beginning). */ | |
200 | optind = 0; | |
601185b4 | 201 | while ((c = getopt_long(argc, argv, "+h", options, NULL)) >= 0) |
eecd1362 LP |
202 | |
203 | switch (c) { | |
204 | ||
205 | case 'h': | |
37ec0fdd | 206 | return help(); |
eecd1362 LP |
207 | |
208 | case ARG_VERSION: | |
3f6fd1ba | 209 | return version(); |
eecd1362 LP |
210 | |
211 | case ARG_WHAT: | |
212 | arg_what = optarg; | |
213 | break; | |
214 | ||
215 | case ARG_WHO: | |
216 | arg_who = optarg; | |
217 | break; | |
218 | ||
219 | case ARG_WHY: | |
220 | arg_why = optarg; | |
221 | break; | |
222 | ||
223 | case ARG_MODE: | |
224 | arg_mode = optarg; | |
225 | break; | |
226 | ||
227 | case ARG_LIST: | |
228 | arg_action = ACTION_LIST; | |
229 | break; | |
230 | ||
f3c9133c | 231 | case ARG_NO_PAGER: |
0221d68a | 232 | arg_pager_flags |= PAGER_DISABLE; |
f3c9133c DT |
233 | break; |
234 | ||
a9426617 LP |
235 | case ARG_NO_LEGEND: |
236 | arg_legend = false; | |
237 | break; | |
238 | ||
eb9da376 | 239 | case '?': |
eecd1362 | 240 | return -EINVAL; |
eb9da376 LP |
241 | |
242 | default: | |
04499a70 | 243 | assert_not_reached(); |
eecd1362 | 244 | } |
eecd1362 | 245 | |
d9130355 | 246 | if (arg_action == ACTION_INHIBIT && optind == argc) |
2f2343c6 KS |
247 | arg_action = ACTION_LIST; |
248 | ||
baaa35ad ZJS |
249 | else if (arg_action == ACTION_INHIBIT && optind >= argc) |
250 | return log_error_errno(SYNTHETIC_ERRNO(EINVAL), | |
251 | "Missing command line to execute."); | |
eecd1362 LP |
252 | |
253 | return 1; | |
254 | } | |
255 | ||
b453c447 | 256 | static int run(int argc, char *argv[]) { |
4afd3348 | 257 | _cleanup_(sd_bus_flush_close_unrefp) sd_bus *bus = NULL; |
5220a6f3 | 258 | int r; |
eecd1362 | 259 | |
1a043959 | 260 | log_show_color(true); |
eecd1362 LP |
261 | log_parse_environment(); |
262 | log_open(); | |
263 | ||
264 | r = parse_argv(argc, argv); | |
b453c447 ZJS |
265 | if (r <= 0) |
266 | return r; | |
eecd1362 | 267 | |
76b54375 | 268 | r = sd_bus_default_system(&bus); |
b453c447 | 269 | if (r < 0) |
10a7340a | 270 | return bus_log_connect_error(r, BUS_TRANSPORT_LOCAL); |
eecd1362 | 271 | |
a34c79d0 ZJS |
272 | if (arg_action == ACTION_LIST) |
273 | return print_inhibitors(bus); | |
a34c79d0 | 274 | else { |
0e6872cd | 275 | _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; |
b473691d | 276 | _cleanup_strv_free_ char **arguments = NULL; |
5220a6f3 | 277 | _cleanup_free_ char *w = NULL; |
254d1313 | 278 | _cleanup_close_ int fd = -EBADF; |
eecd1362 LP |
279 | pid_t pid; |
280 | ||
106f12a0 | 281 | /* Ignore SIGINT and allow the forked process to receive it */ |
9c274488 | 282 | (void) ignore_signals(SIGINT); |
106f12a0 | 283 | |
1b5e34fe LP |
284 | if (!arg_who) { |
285 | w = strv_join(argv + optind, " "); | |
286 | if (!w) | |
287 | return log_oom(); | |
288 | ||
289 | arg_who = w; | |
290 | } | |
eecd1362 | 291 | |
ca5447c0 MM |
292 | if (!arg_mode) |
293 | arg_mode = "block"; | |
294 | ||
eecd1362 | 295 | fd = inhibit(bus, &error); |
b453c447 | 296 | if (fd < 0) |
6bc7a6ac | 297 | return log_error_errno(fd, "Failed to inhibit: %s", bus_error_message(&error, fd)); |
eecd1362 | 298 | |
b473691d LP |
299 | arguments = strv_copy(argv + optind); |
300 | if (!arguments) | |
301 | return log_oom(); | |
302 | ||
e9ccae31 | 303 | r = safe_fork("(inhibit)", FORK_RESET_SIGNALS|FORK_DEATHSIG_SIGTERM|FORK_CLOSE_ALL_FDS|FORK_RLIMIT_NOFILE_SAFE|FORK_LOG, &pid); |
b6e1fff1 | 304 | if (r < 0) |
b453c447 | 305 | return r; |
4c253ed1 | 306 | if (r == 0) { |
eecd1362 | 307 | /* Child */ |
b473691d | 308 | execvp(arguments[0], arguments); |
0b1f3c76 | 309 | log_open(); |
56f64d95 | 310 | log_error_errno(errno, "Failed to execute %s: %m", argv[optind]); |
eecd1362 LP |
311 | _exit(EXIT_FAILURE); |
312 | } | |
313 | ||
b453c447 | 314 | return wait_for_terminate_and_check(argv[optind], pid, WAIT_LOG); |
eecd1362 | 315 | } |
eecd1362 | 316 | } |
b453c447 ZJS |
317 | |
318 | DEFINE_MAIN_FUNCTION_WITH_POSITIVE_FAILURE(run); |