[thirdparty/systemd.git] / src / udev / udevadm-control.c

/* SPDX-License-Identifier: GPL-2.0+ */
/*
 * 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 "process-util.h"
#include "time-util.h"
#include "udev-util.h"
#include "udev.h"
#include "udevadm-util.h"

static void print_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);
}

static int adm_control(struct udev *udev, int argc, char *argv[]) {
        _cleanup_(udev_ctrl_unrefp) 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' },
                { "version",          no_argument,       NULL, 'V' },
                { "help",             no_argument,       NULL, 'h' },
                {}
        };

        if (must_be_root() < 0)
                return 1;

        uctrl = udev_ctrl_new(udev);
        if (uctrl == NULL)
                return 2;

        while ((c = getopt_long(argc, argv, "el:sSRp:m:t:Vh", 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) {
                                log_error("invalid number '%s'", 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) {
                                log_error("expect <KEY>=<value> instead of '%s'", 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) {
                                log_error("invalid number '%s'", optarg);
                                return rc;
                        }
                        if (udev_ctrl_send_set_children_max(uctrl, i, timeout) < 0)
                                rc = 2;
                        else
                                rc = 0;
                        break;
                }
                case 't': {
                        int r, seconds;
                        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.");
                        else {
                                seconds = s != USEC_INFINITY ? (int) DIV_ROUND_UP(s, USEC_PER_SEC) : INT_MAX;
                                timeout = seconds;
                                rc = 0;
                        }
                        break;
                }
                case 'V':
                        print_version();
                        rc = 0;
                        break;
                case 'h':
                        print_help();
                        rc = 0;
                        break;
                }

        if (optind < argc)
                log_error("Extraneous argument: %s", argv[optind]);
        else if (optind == 1)
                log_error("Option missing");
        return rc;
}

const struct udevadm_cmd udevadm_control = {
        .name = "control",
        .cmd = adm_control,
        .help = "Control the udev daemon",
};
Commit	Line	Data
e7145211	1	/* SPDX-License-Identifier: GPL-2.0+ */
3b47c739	2	/*
1298001e	3	* Copyright (C) 2005-2011 Kay Sievers <kay@vrfy.org>
3b47c739	4	*
55e9959b KS	5	* This program is free software: you can redistribute it and/or modify
	6	* it under the terms of the GNU General Public License as published by
	7	* the Free Software Foundation, either version 2 of the License, or
	8	* (at your option) any later version.
3b47c739	9	*
55e9959b KS	10	* This program is distributed in the hope that it will be useful,
	11	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	12	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	13	* GNU General Public License for more details.
3b47c739 KS	14	*/
3b47c739 KS	15
3b47c739	16	#include <errno.h>
cf0fbc49 TA	17	#include <getopt.h>
cf0fbc49 TA	18	#include <stddef.h>
3b47c739 KS	19	#include <stdio.h>
3b47c739 KS	20	#include <stdlib.h>
3b47c739 KS	21	#include <string.h>
3b47c739 KS	22	#include <unistd.h>
3b47c739	23
dccca82b	24	#include "process-util.h"
1f1a5e8b	25	#include "time-util.h"
44433ebd	26	#include "udev-util.h"
cf0fbc49	27	#include "udev.h"
5639df9a	28	#include "udevadm-util.h"
d59f11e1	29
9ec6e95b	30	static void print_help(void) {
5639df9a	31	printf("%s control OPTION\n\n"
5ac0162c LP	32	"Control the udev daemon.\n\n"
5ac0162c LP	33	" -h --help Show this help\n"
5639df9a	34	" -V --version Show package version\n"
5ac0162c LP	35	" -e --exit Instruct the daemon to cleanup and exit\n"
	36	" -l --log-priority=LEVEL Set the udev log level for the daemon\n"
	37	" -s --stop-exec-queue Do not execute events, queue only\n"
	38	" -S --start-exec-queue Execute events, flush queue\n"
	39	" -R --reload Reload rules and databases\n"
	40	" -p --property=KEY=VALUE Set a global property for all events\n"
	41	" -m --children-max=N Maximum number of children\n"
a04a9027	42	" -t --timeout=SECONDS Maximum time to block for a reply\n"
5ac0162c	43	, program_invocation_short_name);
d59f11e1	44	}
3b47c739	45
9ec6e95b	46	static int adm_control(struct udev udev, int argc, char argv[]) {
8e766630	47	_cleanup_(udev_ctrl_unrefp) struct udev_ctrl *uctrl = NULL;
912541b0	48	int timeout = 60;
7643ac9a	49	int rc = 1, c;
2b725651	50
912541b0	51	static const struct option options[] = {
7643ac9a ZJS	52	{ "exit", no_argument, NULL, 'e' },
	53	{ "log-priority", required_argument, NULL, 'l' },
	54	{ "stop-exec-queue", no_argument, NULL, 's' },
	55	{ "start-exec-queue", no_argument, NULL, 'S' },
	56	{ "reload", no_argument, NULL, 'R' },
	57	{ "reload-rules", no_argument, NULL, 'R' }, /* alias for -R */
	58	{ "property", required_argument, NULL, 'p' },
	59	{ "env", required_argument, NULL, 'p' }, /* alias for -p */
	60	{ "children-max", required_argument, NULL, 'm' },
	61	{ "timeout", required_argument, NULL, 't' },
5639df9a	62	{ "version", no_argument, NULL, 'V' },
7643ac9a	63	{ "help", no_argument, NULL, 'h' },
912541b0 KS	64	{}
912541b0 KS	65	};
3b47c739	66
fba868fa	67	if (must_be_root() < 0)
912541b0	68	return 1;
2b725651	69
912541b0 KS	70	uctrl = udev_ctrl_new(udev);
	71	if (uctrl == NULL)
	72	return 2;
2b725651	73
5639df9a	74	while ((c = getopt_long(argc, argv, "el:sSRp:m:t:Vh", options, NULL)) >= 0)
7643ac9a	75	switch (c) {
912541b0 KS	76	case 'e':
	77	if (udev_ctrl_send_exit(uctrl, timeout) < 0)
	78	rc = 2;
	79	else
	80	rc = 0;
	81	break;
	82	case 'l': {
	83	int i;
ff2c503d	84
912541b0 KS	85	i = util_log_priority(optarg);
912541b0 KS	86	if (i < 0) {
1f1a5e8b	87	log_error("invalid number '%s'", optarg);
44433ebd	88	return rc;
912541b0 KS	89	}
	90	if (udev_ctrl_send_set_log_level(uctrl, util_log_priority(optarg), timeout) < 0)
	91	rc = 2;
	92	else
	93	rc = 0;
	94	break;
	95	}
	96	case 's':
	97	if (udev_ctrl_send_stop_exec_queue(uctrl, timeout) < 0)
	98	rc = 2;
	99	else
	100	rc = 0;
	101	break;
	102	case 'S':
	103	if (udev_ctrl_send_start_exec_queue(uctrl, timeout) < 0)
	104	rc = 2;
	105	else
	106	rc = 0;
	107	break;
	108	case 'R':
	109	if (udev_ctrl_send_reload(uctrl, timeout) < 0)
	110	rc = 2;
	111	else
	112	rc = 0;
	113	break;
	114	case 'p':
	115	if (strchr(optarg, '=') == NULL) {
1f1a5e8b	116	log_error("expect <KEY>=<value> instead of '%s'", optarg);
44433ebd	117	return rc;
912541b0 KS	118	}
	119	if (udev_ctrl_send_set_env(uctrl, optarg, timeout) < 0)
	120	rc = 2;
	121	else
	122	rc = 0;
	123	break;
	124	case 'm': {
	125	char *endp;
	126	int i;
ff2c503d	127
912541b0 KS	128	i = strtoul(optarg, &endp, 0);
912541b0 KS	129	if (endp[0] != '\0' \|\| i < 1) {
1f1a5e8b	130	log_error("invalid number '%s'", optarg);
44433ebd	131	return rc;
912541b0 KS	132	}
	133	if (udev_ctrl_send_set_children_max(uctrl, i, timeout) < 0)
	134	rc = 2;
	135	else
	136	rc = 0;
	137	break;
	138	}
	139	case 't': {
be6b0c21	140	int r, seconds;
1f1a5e8b	141	usec_t s;
ff2c503d	142
1f1a5e8b SS	143	r = parse_sec(optarg, &s);
	144	if (r < 0)
	145	return log_error_errno(r, "Failed to parse timeout value '%s'.", optarg);
	146
be6b0c21	147	if (DIV_ROUND_UP(s, USEC_PER_SEC) > INT_MAX)
1f1a5e8b SS	148	log_error("Timeout value is out of range.");
1f1a5e8b SS	149	else {
be6b0c21	150	seconds = s != USEC_INFINITY ? (int) DIV_ROUND_UP(s, USEC_PER_SEC) : INT_MAX;
912541b0	151	timeout = seconds;
1f1a5e8b SS	152	rc = 0;
1f1a5e8b SS	153	}
912541b0 KS	154	break;
912541b0 KS	155	}
5639df9a YW	156	case 'V':
	157	print_version();
	158	rc = 0;
	159	break;
912541b0 KS	160	case 'h':
	161	print_help();
	162	rc = 0;
	163	break;
	164	}
5cc4112e	165
7643ac9a	166	if (optind < argc)
1f1a5e8b	167	log_error("Extraneous argument: %s", argv[optind]);
912541b0	168	else if (optind == 1)
1f1a5e8b	169	log_error("Option missing");
912541b0	170	return rc;
3b47c739	171	}
1985c76e KS	172
1985c76e KS	173	const struct udevadm_cmd udevadm_control = {
912541b0 KS	174	.name = "control",
912541b0 KS	175	.cmd = adm_control,
5ac0162c	176	.help = "Control the udev daemon",
1985c76e	177	};