Branch data Line data Source code
1 : : /* SPDX-License-Identifier: GPL-2.0+ */
2 : : /*
3 : : * This program is free software: you can redistribute it and/or modify
4 : : * it under the terms of the GNU General Public License as published by
5 : : * the Free Software Foundation, either version 2 of the License, or
6 : : * (at your option) any later version.
7 : : *
8 : : * This program is distributed in the hope that it will be useful,
9 : : * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 : : * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 : : * GNU General Public License for more details.
12 : : */
13 : :
14 : : #include <errno.h>
15 : : #include <getopt.h>
16 : : #include <stddef.h>
17 : : #include <stdio.h>
18 : : #include <stdlib.h>
19 : : #include <string.h>
20 : : #include <unistd.h>
21 : :
22 : : #include "parse-util.h"
23 : : #include "process-util.h"
24 : : #include "syslog-util.h"
25 : : #include "time-util.h"
26 : : #include "udevadm.h"
27 : : #include "udev-ctrl.h"
28 : : #include "util.h"
29 : : #include "virt.h"
30 : :
31 : 0 : static int help(void) {
32 : 0 : printf("%s control OPTION\n\n"
33 : : "Control the udev daemon.\n\n"
34 : : " -h --help Show this help\n"
35 : : " -V --version Show package version\n"
36 : : " -e --exit Instruct the daemon to cleanup and exit\n"
37 : : " -l --log-priority=LEVEL Set the udev log level for the daemon\n"
38 : : " -s --stop-exec-queue Do not execute events, queue only\n"
39 : : " -S --start-exec-queue Execute events, flush queue\n"
40 : : " -R --reload Reload rules and databases\n"
41 : : " -p --property=KEY=VALUE Set a global property for all events\n"
42 : : " -m --children-max=N Maximum number of children\n"
43 : : " --ping Wait for udev to respond to a ping message\n"
44 : : " -t --timeout=SECONDS Maximum time to block for a reply\n"
45 : : , program_invocation_short_name);
46 : :
47 : 0 : return 0;
48 : : }
49 : :
50 : 0 : int control_main(int argc, char *argv[], void *userdata) {
51 : 0 : _cleanup_(udev_ctrl_unrefp) struct udev_ctrl *uctrl = NULL;
52 : 0 : usec_t timeout = 60 * USEC_PER_SEC;
53 : : int c, r;
54 : :
55 : : enum {
56 : : ARG_PING = 0x100,
57 : : };
58 : :
59 : : static const struct option options[] = {
60 : : { "exit", no_argument, NULL, 'e' },
61 : : { "log-priority", required_argument, NULL, 'l' },
62 : : { "stop-exec-queue", no_argument, NULL, 's' },
63 : : { "start-exec-queue", no_argument, NULL, 'S' },
64 : : { "reload", no_argument, NULL, 'R' },
65 : : { "reload-rules", no_argument, NULL, 'R' }, /* alias for -R */
66 : : { "property", required_argument, NULL, 'p' },
67 : : { "env", required_argument, NULL, 'p' }, /* alias for -p */
68 : : { "children-max", required_argument, NULL, 'm' },
69 : : { "ping", no_argument, NULL, ARG_PING },
70 : : { "timeout", required_argument, NULL, 't' },
71 : : { "version", no_argument, NULL, 'V' },
72 : : { "help", no_argument, NULL, 'h' },
73 : : {}
74 : : };
75 : :
76 [ # # ]: 0 : if (running_in_chroot() > 0) {
77 [ # # ]: 0 : log_info("Running in chroot, ignoring request.");
78 : 0 : return 0;
79 : : }
80 : :
81 [ # # ]: 0 : if (argc <= 1)
82 [ # # ]: 0 : return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
83 : : "This command expects one or more options.");
84 : :
85 : 0 : r = udev_ctrl_new(&uctrl);
86 [ # # ]: 0 : if (r < 0)
87 [ # # ]: 0 : return log_error_errno(r, "Failed to initialize udev control: %m");
88 : :
89 [ # # ]: 0 : while ((c = getopt_long(argc, argv, "el:sSRp:m:t:Vh", options, NULL)) >= 0)
90 [ # # # # : 0 : switch (c) {
# # # # #
# # # # ]
91 : 0 : case 'e':
92 : 0 : r = udev_ctrl_send_exit(uctrl);
93 [ # # ]: 0 : if (r == -ENOANO)
94 [ # # ]: 0 : log_warning("Cannot specify --exit after --exit, ignoring.");
95 [ # # ]: 0 : else if (r < 0)
96 [ # # ]: 0 : return log_error_errno(r, "Failed to send exit request: %m");
97 : 0 : break;
98 : 0 : case 'l':
99 : 0 : r = log_level_from_string(optarg);
100 [ # # ]: 0 : if (r < 0)
101 [ # # ]: 0 : return log_error_errno(r, "Failed to parse log priority '%s': %m", optarg);
102 : :
103 : 0 : r = udev_ctrl_send_set_log_level(uctrl, r);
104 [ # # ]: 0 : if (r == -ENOANO)
105 [ # # ]: 0 : log_warning("Cannot specify --log-priority after --exit, ignoring.");
106 [ # # ]: 0 : else if (r < 0)
107 [ # # ]: 0 : return log_error_errno(r, "Failed to send request to set log level: %m");
108 : 0 : break;
109 : 0 : case 's':
110 : 0 : r = udev_ctrl_send_stop_exec_queue(uctrl);
111 [ # # ]: 0 : if (r == -ENOANO)
112 [ # # ]: 0 : log_warning("Cannot specify --stop-exec-queue after --exit, ignoring.");
113 [ # # ]: 0 : else if (r < 0)
114 [ # # ]: 0 : return log_error_errno(r, "Failed to send request to stop exec queue: %m");
115 : 0 : break;
116 : 0 : case 'S':
117 : 0 : r = udev_ctrl_send_start_exec_queue(uctrl);
118 [ # # ]: 0 : if (r == -ENOANO)
119 [ # # ]: 0 : log_warning("Cannot specify --start-exec-queue after --exit, ignoring.");
120 [ # # ]: 0 : else if (r < 0)
121 [ # # ]: 0 : return log_error_errno(r, "Failed to send request to start exec queue: %m");
122 : 0 : break;
123 : 0 : case 'R':
124 : 0 : r = udev_ctrl_send_reload(uctrl);
125 [ # # ]: 0 : if (r == -ENOANO)
126 [ # # ]: 0 : log_warning("Cannot specify --reload after --exit, ignoring.");
127 [ # # ]: 0 : else if (r < 0)
128 [ # # ]: 0 : return log_error_errno(r, "Failed to send reload request: %m");
129 : 0 : break;
130 : 0 : case 'p':
131 [ # # ]: 0 : if (!strchr(optarg, '='))
132 [ # # ]: 0 : return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "expect <KEY>=<value> instead of '%s'", optarg);
133 : :
134 : 0 : r = udev_ctrl_send_set_env(uctrl, optarg);
135 [ # # ]: 0 : if (r == -ENOANO)
136 [ # # ]: 0 : log_warning("Cannot specify --property after --exit, ignoring.");
137 [ # # ]: 0 : else if (r < 0)
138 [ # # ]: 0 : return log_error_errno(r, "Failed to send request to update environment: %m");
139 : 0 : break;
140 : 0 : case 'm': {
141 : : unsigned i;
142 : :
143 : 0 : r = safe_atou(optarg, &i);
144 [ # # ]: 0 : if (r < 0)
145 [ # # ]: 0 : return log_error_errno(r, "Failed to parse maximum number of events '%s': %m", optarg);
146 : :
147 : 0 : r = udev_ctrl_send_set_children_max(uctrl, i);
148 [ # # ]: 0 : if (r == -ENOANO)
149 [ # # ]: 0 : log_warning("Cannot specify --children-max after --exit, ignoring.");
150 [ # # ]: 0 : else if (r < 0)
151 [ # # ]: 0 : return log_error_errno(r, "Failed to send request to set number of children: %m");
152 : 0 : break;
153 : : }
154 : 0 : case ARG_PING:
155 : 0 : r = udev_ctrl_send_ping(uctrl);
156 [ # # ]: 0 : if (r == -ENOANO)
157 [ # # ]: 0 : log_error("Cannot specify --ping after --exit, ignoring.");
158 [ # # ]: 0 : else if (r < 0)
159 [ # # ]: 0 : return log_error_errno(r, "Failed to send a ping message: %m");
160 : 0 : break;
161 : 0 : case 't':
162 : 0 : r = parse_sec(optarg, &timeout);
163 [ # # ]: 0 : if (r < 0)
164 [ # # ]: 0 : return log_error_errno(r, "Failed to parse timeout value '%s': %m", optarg);
165 : 0 : break;
166 : 0 : case 'V':
167 : 0 : return print_version();
168 : 0 : case 'h':
169 : 0 : return help();
170 : 0 : case '?':
171 : 0 : return -EINVAL;
172 : 0 : default:
173 : 0 : assert_not_reached("Unknown option.");
174 : : }
175 : :
176 [ # # ]: 0 : if (optind < argc)
177 [ # # ]: 0 : return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
178 : : "Extraneous argument: %s", argv[optind]);
179 : :
180 : 0 : r = udev_ctrl_wait(uctrl, timeout);
181 [ # # ]: 0 : if (r < 0)
182 [ # # ]: 0 : return log_error_errno(r, "Failed to wait for daemon to reply: %m");
183 : :
184 : 0 : return 0;
185 : : }
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