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