udevadm-control.c revision b26fa1a2fbcfee7d03b0c8fd15ec3aa64ae70b9f
/*
* Copyright (C) 2005-2011 Kay Sievers <kay@vrfy.org>
*
* 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 "udev-util.h"
#include "udev.h"
static void print_help(void) {
printf("%s control COMMAND\n\n"
"Control the udev daemon.\n\n"
" -h --help Show this help\n"
" --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"
" --timeout=SECONDS Maximum time to block for a reply\n"
, program_invocation_short_name);
}
static int adm_control(struct udev *udev, int argc, char *argv[]) {
_cleanup_udev_ctrl_unref_ struct udev_ctrl *uctrl = NULL;
int timeout = 60;
int rc = 1, c;
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' },
{ "help", no_argument, NULL, 'h' },
{}
};
if (getuid() != 0) {
fprintf(stderr, "root privileges required\n");
return 1;
}
uctrl = udev_ctrl_new(udev);
if (uctrl == NULL)
return 2;
while ((c = getopt_long(argc, argv, "el:sSRp:m:h", options, NULL)) >= 0)
switch (c) {
case 'e':
if (udev_ctrl_send_exit(uctrl, timeout) < 0)
rc = 2;
else
rc = 0;
break;
case 'l': {
int i;
i = util_log_priority(optarg);
if (i < 0) {
fprintf(stderr, "invalid number '%s'\n", optarg);
return rc;
}
if (udev_ctrl_send_set_log_level(uctrl, util_log_priority(optarg), timeout) < 0)
rc = 2;
else
rc = 0;
break;
}
case 's':
if (udev_ctrl_send_stop_exec_queue(uctrl, timeout) < 0)
rc = 2;
else
rc = 0;
break;
case 'S':
if (udev_ctrl_send_start_exec_queue(uctrl, timeout) < 0)
rc = 2;
else
rc = 0;
break;
case 'R':
if (udev_ctrl_send_reload(uctrl, timeout) < 0)
rc = 2;
else
rc = 0;
break;
case 'p':
if (strchr(optarg, '=') == NULL) {
fprintf(stderr, "expect <KEY>=<value> instead of '%s'\n", optarg);
return rc;
}
if (udev_ctrl_send_set_env(uctrl, optarg, timeout) < 0)
rc = 2;
else
rc = 0;
break;
case 'm': {
char *endp;
int i;
i = strtoul(optarg, &endp, 0);
if (endp[0] != '\0' || i < 1) {
fprintf(stderr, "invalid number '%s'\n", optarg);
return rc;
}
if (udev_ctrl_send_set_children_max(uctrl, i, timeout) < 0)
rc = 2;
else
rc = 0;
break;
}
case 't': {
int seconds;
seconds = atoi(optarg);
if (seconds >= 0)
timeout = seconds;
else
fprintf(stderr, "invalid timeout value\n");
break;
}
case 'h':
print_help();
rc = 0;
break;
}
if (optind < argc)
fprintf(stderr, "Extraneous argument: %s\n", argv[optind]);
else if (optind == 1)
fprintf(stderr, "Option missing\n");
return rc;
}
const struct udevadm_cmd udevadm_control = {
.name = "control",
.cmd = adm_control,
.help = "Control the udev daemon",
};