166 lines
6.4 KiB
C
166 lines
6.4 KiB
C
/* SPDX-License-Identifier: GPL-2.0+ */
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/*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#include <errno.h>
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#include <getopt.h>
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#include <stddef.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include "parse-util.h"
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#include "process-util.h"
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#include "time-util.h"
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#include "udev.h"
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#include "udevadm.h"
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static int help(void) {
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printf("%s control OPTION\n\n"
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"Control the udev daemon.\n\n"
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" -h --help Show this help\n"
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" -V --version Show package version\n"
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" -e --exit Instruct the daemon to cleanup and exit\n"
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" -l --log-priority=LEVEL Set the udev log level for the daemon\n"
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" -s --stop-exec-queue Do not execute events, queue only\n"
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" -S --start-exec-queue Execute events, flush queue\n"
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" -R --reload Reload rules and databases\n"
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" -p --property=KEY=VALUE Set a global property for all events\n"
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" -m --children-max=N Maximum number of children\n"
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" -t --timeout=SECONDS Maximum time to block for a reply\n"
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, program_invocation_short_name);
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return 0;
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}
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int control_main(int argc, char *argv[], void *userdata) {
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_cleanup_(udev_ctrl_unrefp) struct udev_ctrl *uctrl = NULL;
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int timeout = 60;
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int c, r;
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static const struct option options[] = {
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{ "exit", no_argument, NULL, 'e' },
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{ "log-priority", required_argument, NULL, 'l' },
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{ "stop-exec-queue", no_argument, NULL, 's' },
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{ "start-exec-queue", no_argument, NULL, 'S' },
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{ "reload", no_argument, NULL, 'R' },
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{ "reload-rules", no_argument, NULL, 'R' }, /* alias for -R */
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{ "property", required_argument, NULL, 'p' },
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{ "env", required_argument, NULL, 'p' }, /* alias for -p */
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{ "children-max", required_argument, NULL, 'm' },
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{ "timeout", required_argument, NULL, 't' },
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{ "version", no_argument, NULL, 'V' },
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{ "help", no_argument, NULL, 'h' },
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{}
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};
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r = must_be_root();
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if (r < 0)
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return r;
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if (argc <= 1)
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log_error("Option missing");
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uctrl = udev_ctrl_new();
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if (!uctrl)
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return -ENOMEM;
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while ((c = getopt_long(argc, argv, "el:sSRp:m:t:Vh", options, NULL)) >= 0)
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switch (c) {
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case 'e':
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r = udev_ctrl_send_exit(uctrl, timeout);
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if (r < 0)
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return r;
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break;
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case 'l': {
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int i;
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i = util_log_priority(optarg);
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if (i < 0)
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return log_error_errno(i, "invalid number '%s'", optarg);
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r = udev_ctrl_send_set_log_level(uctrl, i, timeout);
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if (r < 0)
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return r;
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break;
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}
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case 's':
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r = udev_ctrl_send_stop_exec_queue(uctrl, timeout);
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if (r < 0)
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return r;
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break;
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case 'S':
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r = udev_ctrl_send_start_exec_queue(uctrl, timeout);
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if (r < 0)
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return r;
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break;
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case 'R':
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r = udev_ctrl_send_reload(uctrl, timeout);
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if (r < 0)
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return r;
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break;
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case 'p':
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if (!strchr(optarg, '=')) {
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log_error("expect <KEY>=<value> instead of '%s'", optarg);
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return -EINVAL;
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}
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r = udev_ctrl_send_set_env(uctrl, optarg, timeout);
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if (r < 0)
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return r;
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break;
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case 'm': {
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unsigned i;
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r = safe_atou(optarg, &i);
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if (r < 0)
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return log_error_errno(r, "Failed to parse maximum number of events '%s': %m", optarg);
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r = udev_ctrl_send_set_children_max(uctrl, i, timeout);
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if (r < 0)
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return r;
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break;
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}
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case 't': {
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usec_t s;
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r = parse_sec(optarg, &s);
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if (r < 0)
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return log_error_errno(r, "Failed to parse timeout value '%s'.", optarg);
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if (DIV_ROUND_UP(s, USEC_PER_SEC) > INT_MAX)
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log_error("Timeout value is out of range, ignoring.");
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else
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timeout = s != USEC_INFINITY ? (int) DIV_ROUND_UP(s, USEC_PER_SEC) : INT_MAX;
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break;
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}
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case 'V':
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return version();
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case 'h':
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return help();
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case '?':
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return -EINVAL;
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default:
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assert_not_reached("Unknown option.");
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}
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if (optind < argc) {
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log_error("Extraneous argument: %s", argv[optind]);
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return -EINVAL;
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} else if (optind == 1) {
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log_error("Option missing");
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return -EINVAL;
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}
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return 0;
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}
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