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

/*
 * Copyright (C) 2008-2009 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.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

#include <errno.h>
#include <fcntl.h>
#include <getopt.h>
#include <stddef.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>

#include "string-util.h"
#include "udev-util.h"
#include "udev.h"
#include "udevadm-util.h"
#include "util.h"

static int verbose;
static int dry_run;

static void exec_list(struct udev_enumerate *udev_enumerate, const char *action) {
        struct udev_list_entry *entry;

        udev_list_entry_foreach(entry, udev_enumerate_get_list_entry(udev_enumerate)) {
                char filename[UTIL_PATH_SIZE];
                int fd;

                if (verbose)
                        printf("%s\n", udev_list_entry_get_name(entry));
                if (dry_run)
                        continue;
                strscpyl(filename, sizeof(filename), udev_list_entry_get_name(entry), "/uevent", NULL);
                fd = open(filename, O_WRONLY|O_CLOEXEC);
                if (fd < 0)
                        continue;
                if (write(fd, action, strlen(action)) < 0)
                        log_debug_errno(errno, "error writing '%s' to '%s': %m", action, filename);
                close(fd);
        }
}

static const char *keyval(const char *str, const char **val, char *buf, size_t size) {
        char *pos;

        strscpy(buf, size,str);
        pos = strchr(buf, '=');
        if (pos != NULL) {
                pos[0] = 0;
                pos++;
        }
        *val = pos;
        return buf;
}

static void help(void) {
        printf("%s trigger OPTIONS\n\n"
               "Request events from the kernel.\n\n"
               "  -h --help                         Show this help\n"
               "     --version                      Show package version\n"
               "  -v --verbose                      Print the list of devices while running\n"
               "  -n --dry-run                      Do not actually trigger the events\n"
               "  -t --type=                        Type of events to trigger\n"
               "          devices                     sysfs devices (default)\n"
               "          subsystems                  sysfs subsystems and drivers\n"
               "  -c --action=ACTION                Event action value, default is \"change\"\n"
               "  -s --subsystem-match=SUBSYSTEM    Trigger devices from a matching subsystem\n"
               "  -S --subsystem-nomatch=SUBSYSTEM  Exclude devices from a matching subsystem\n"
               "  -a --attr-match=FILE[=VALUE]      Trigger devices with a matching attribute\n"
               "  -A --attr-nomatch=FILE[=VALUE]    Exclude devices with a matching attribute\n"
               "  -p --property-match=KEY=VALUE     Trigger devices with a matching property\n"
               "  -g --tag-match=KEY=VALUE          Trigger devices with a matching property\n"
               "  -y --sysname-match=NAME           Trigger devices with this /sys path\n"
               "     --name-match=NAME              Trigger devices with this /dev name\n"
               "  -b --parent-match=NAME            Trigger devices with that parent device\n"
               , program_invocation_short_name);
}

static int adm_trigger(struct udev *udev, int argc, char *argv[]) {
        enum {
                ARG_NAME = 0x100,
        };

        static const struct option options[] = {
                { "verbose",           no_argument,       NULL, 'v'      },
                { "dry-run",           no_argument,       NULL, 'n'      },
                { "type",              required_argument, NULL, 't'      },
                { "action",            required_argument, NULL, 'c'      },
                { "subsystem-match",   required_argument, NULL, 's'      },
                { "subsystem-nomatch", required_argument, NULL, 'S'      },
                { "attr-match",        required_argument, NULL, 'a'      },
                { "attr-nomatch",      required_argument, NULL, 'A'      },
                { "property-match",    required_argument, NULL, 'p'      },
                { "tag-match",         required_argument, NULL, 'g'      },
                { "sysname-match",     required_argument, NULL, 'y'      },
                { "name-match",        required_argument, NULL, ARG_NAME },
                { "parent-match",      required_argument, NULL, 'b'      },
                { "help",              no_argument,       NULL, 'h'      },
                {}
        };
        enum {
                TYPE_DEVICES,
                TYPE_SUBSYSTEMS,
        } device_type = TYPE_DEVICES;
        const char *action = "change";
        _cleanup_udev_enumerate_unref_ struct udev_enumerate *udev_enumerate = NULL;
        int c, r;

        udev_enumerate = udev_enumerate_new(udev);
        if (udev_enumerate == NULL)
                return 1;

        while ((c = getopt_long(argc, argv, "vno:t:c:s:S:a:A:p:g:y:b:h", options, NULL)) >= 0) {
                const char *key;
                const char *val;
                char buf[UTIL_PATH_SIZE];

                switch (c) {
                case 'v':
                        verbose = 1;
                        break;
                case 'n':
                        dry_run = 1;
                        break;
                case 't':
                        if (streq(optarg, "devices"))
                                device_type = TYPE_DEVICES;
                        else if (streq(optarg, "subsystems"))
                                device_type = TYPE_SUBSYSTEMS;
                        else {
                                log_error("unknown type --type=%s", optarg);
                                return 2;
                        }
                        break;
                case 'c':
                        if (!nulstr_contains("add\0" "remove\0" "change\0", optarg)) {
                                log_error("unknown action '%s'", optarg);
                                return 2;
                        } else
                                action = optarg;

                        break;
                case 's':
                        r = udev_enumerate_add_match_subsystem(udev_enumerate, optarg);
                        if (r < 0) {
                                log_error_errno(r, "could not add subsystem match '%s': %m", optarg);
                                return 2;
                        }
                        break;
                case 'S':
                        r = udev_enumerate_add_nomatch_subsystem(udev_enumerate, optarg);
                        if (r < 0) {
                                log_error_errno(r, "could not add negative subsystem match '%s': %m", optarg);
                                return 2;
                        }
                        break;
                case 'a':
                        key = keyval(optarg, &val, buf, sizeof(buf));
                        r = udev_enumerate_add_match_sysattr(udev_enumerate, key, val);
                        if (r < 0) {
                                log_error_errno(r, "could not add sysattr match '%s=%s': %m", key, val);
                                return 2;
                        }
                        break;
                case 'A':
                        key = keyval(optarg, &val, buf, sizeof(buf));
                        r = udev_enumerate_add_nomatch_sysattr(udev_enumerate, key, val);
                        if (r < 0) {
                                log_error_errno(r, "could not add negative sysattr match '%s=%s': %m", key, val);
                                return 2;
                        }
                        break;
                case 'p':
                        key = keyval(optarg, &val, buf, sizeof(buf));
                        r = udev_enumerate_add_match_property(udev_enumerate, key, val);
                        if (r < 0) {
                                log_error_errno(r, "could not add property match '%s=%s': %m", key, val);
                                return 2;
                        }
                        break;
                case 'g':
                        r = udev_enumerate_add_match_tag(udev_enumerate, optarg);
                        if (r < 0) {
                                log_error_errno(r, "could not add tag match '%s': %m", optarg);
                                return 2;
                        }
                        break;
                case 'y':
                        r = udev_enumerate_add_match_sysname(udev_enumerate, optarg);
                        if (r < 0) {
                                log_error_errno(r, "could not add sysname match '%s': %m", optarg);
                                return 2;
                        }
                        break;
                case 'b': {
                        _cleanup_udev_device_unref_ struct udev_device *dev;

                        dev = find_device(udev, optarg, "/sys");
                        if (dev == NULL) {
                                log_error("unable to open the device '%s'", optarg);
                                return 2;
                        }

                        r = udev_enumerate_add_match_parent(udev_enumerate, dev);
                        if (r < 0) {
                                log_error_errno(r, "could not add parent match '%s': %m", optarg);
                                return 2;
                        }
                        break;
                }

                case ARG_NAME: {
                        _cleanup_udev_device_unref_ struct udev_device *dev;

                        dev = find_device(udev, optarg, "/dev/");
                        if (dev == NULL) {
                                log_error("unable to open the device '%s'", optarg);
                                return 2;
                        }

                        r = udev_enumerate_add_match_parent(udev_enumerate, dev);
                        if (r < 0) {
                                log_error_errno(r, "could not add parent match '%s': %m", optarg);
                                return 2;
                        }
                        break;
                }

                case 'h':
                        help();
                        return 0;
                case '?':
                        return 1;
                default:
                        assert_not_reached("Unknown option");
                }
        }

        for (; optind < argc; optind++) {
                _cleanup_udev_device_unref_ struct udev_device *dev;

                dev = find_device(udev, argv[optind], NULL);
                if (dev == NULL) {
                        log_error("unable to open the device '%s'", argv[optind]);
                        return 2;
                }

                r = udev_enumerate_add_match_parent(udev_enumerate, dev);
                if (r < 0) {
                        log_error_errno(r, "could not add tag match '%s': %m", optarg);
                        return 2;
                }
        }

        switch (device_type) {
        case TYPE_SUBSYSTEMS:
                udev_enumerate_scan_subsystems(udev_enumerate);
                exec_list(udev_enumerate, action);
                return 0;
        case TYPE_DEVICES:
                udev_enumerate_scan_devices(udev_enumerate);
                exec_list(udev_enumerate, action);
                return 0;
        default:
                assert_not_reached("device_type");
        }
}

const struct udevadm_cmd udevadm_trigger = {
        .name = "trigger",
        .cmd = adm_trigger,
        .help = "Request events from the kernel",
};
Commit	Line	Data
0d5be398	1	/*
1298001e	2	* Copyright (C) 2008-2009 Kay Sievers <kay@vrfy.org>
0d5be398	3	*
55e9959b KS	4	* This program is free software: you can redistribute it and/or modify
	5	* it under the terms of the GNU General Public License as published by
	6	* the Free Software Foundation, either version 2 of the License, or
	7	* (at your option) any later version.
0d5be398	8	*
55e9959b KS	9	* This program is distributed in the hope that it will be useful,
	10	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	11	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	12	* GNU General Public License for more details.
	13	*
	14	* You should have received a copy of the GNU General Public License
	15	* along with this program. If not, see <http://www.gnu.org/licenses/>.
0d5be398 KS	16	*/
0d5be398 KS	17
07630cea LP	18	#include <errno.h>
	19	#include <fcntl.h>
	20	#include <getopt.h>
0d5be398	21	#include <stddef.h>
0d5be398	22	#include <stdio.h>
07630cea	23	#include <string.h>
0d5be398	24	#include <unistd.h>
0d5be398	25
07630cea	26	#include "string-util.h"
44433ebd	27	#include "udev-util.h"
07630cea	28	#include "udev.h"
d6170d27	29	#include "udevadm-util.h"
c5383e79	30	#include "util.h"
0d5be398	31
c48622cc KS	32	static int verbose;
c48622cc KS	33	static int dry_run;
c48622cc	34
9ec6e95b	35	static void exec_list(struct udev_enumerate udev_enumerate, const char action) {
912541b0 KS	36	struct udev_list_entry *entry;
	37
	38	udev_list_entry_foreach(entry, udev_enumerate_get_list_entry(udev_enumerate)) {
	39	char filename[UTIL_PATH_SIZE];
	40	int fd;
	41
	42	if (verbose)
	43	printf("%s\n", udev_list_entry_get_name(entry));
	44	if (dry_run)
	45	continue;
d5a89d7d	46	strscpyl(filename, sizeof(filename), udev_list_entry_get_name(entry), "/uevent", NULL);
c8a202b7	47	fd = open(filename, O_WRONLY\|O_CLOEXEC);
baa30fbc	48	if (fd < 0)
912541b0	49	continue;
912541b0	50	if (write(fd, action, strlen(action)) < 0)
56f64d95	51	log_debug_errno(errno, "error writing '%s' to '%s': %m", action, filename);
912541b0 KS	52	close(fd);
912541b0 KS	53	}
0d5be398 KS	54	}
0d5be398 KS	55
9ec6e95b	56	static const char keyval(const char str, const char *val, char buf, size_t size) {
912541b0 KS	57	char *pos;
912541b0 KS	58
d5a89d7d	59	strscpy(buf, size,str);
912541b0 KS	60	pos = strchr(buf, '=');
	61	if (pos != NULL) {
	62	pos[0] = 0;
	63	pos++;
	64	}
	65	*val = pos;
	66	return buf;
80381823 KS	67	}
80381823 KS	68
7643ac9a	69	static void help(void) {
5ac0162c LP	70	printf("%s trigger OPTIONS\n\n"
	71	"Request events from the kernel.\n\n"
	72	" -h --help Show this help\n"
	73	" --version Show package version\n"
	74	" -v --verbose Print the list of devices while running\n"
	75	" -n --dry-run Do not actually trigger the events\n"
	76	" -t --type= Type of events to trigger\n"
	77	" devices sysfs devices (default)\n"
	78	" subsystems sysfs subsystems and drivers\n"
	79	" -c --action=ACTION Event action value, default is \"change\"\n"
	80	" -s --subsystem-match=SUBSYSTEM Trigger devices from a matching subsystem\n"
	81	" -S --subsystem-nomatch=SUBSYSTEM Exclude devices from a matching subsystem\n"
	82	" -a --attr-match=FILE[=VALUE] Trigger devices with a matching attribute\n"
	83	" -A --attr-nomatch=FILE[=VALUE] Exclude devices with a matching attribute\n"
	84	" -p --property-match=KEY=VALUE Trigger devices with a matching property\n"
	85	" -g --tag-match=KEY=VALUE Trigger devices with a matching property\n"
	86	" -y --sysname-match=NAME Trigger devices with this /sys path\n"
	87	" --name-match=NAME Trigger devices with this /dev name\n"
	88	" -b --parent-match=NAME Trigger devices with that parent device\n"
	89	, program_invocation_short_name);
7643ac9a ZJS	90	}
7643ac9a ZJS	91
9ec6e95b	92	static int adm_trigger(struct udev udev, int argc, char argv[]) {
80877656 ZJS	93	enum {
	94	ARG_NAME = 0x100,
	95	};
	96
912541b0	97	static const struct option options[] = {
80877656 ZJS	98	{ "verbose", no_argument, NULL, 'v' },
	99	{ "dry-run", no_argument, NULL, 'n' },
	100	{ "type", required_argument, NULL, 't' },
	101	{ "action", required_argument, NULL, 'c' },
	102	{ "subsystem-match", required_argument, NULL, 's' },
	103	{ "subsystem-nomatch", required_argument, NULL, 'S' },
	104	{ "attr-match", required_argument, NULL, 'a' },
	105	{ "attr-nomatch", required_argument, NULL, 'A' },
	106	{ "property-match", required_argument, NULL, 'p' },
	107	{ "tag-match", required_argument, NULL, 'g' },
	108	{ "sysname-match", required_argument, NULL, 'y' },
	109	{ "name-match", required_argument, NULL, ARG_NAME },
	110	{ "parent-match", required_argument, NULL, 'b' },
	111	{ "help", no_argument, NULL, 'h' },
912541b0 KS	112	{}
	113	};
	114	enum {
	115	TYPE_DEVICES,
	116	TYPE_SUBSYSTEMS,
	117	} device_type = TYPE_DEVICES;
	118	const char *action = "change";
44433ebd	119	_cleanup_udev_enumerate_unref_ struct udev_enumerate *udev_enumerate = NULL;
56b13bcc	120	int c, r;
912541b0	121
912541b0	122	udev_enumerate = udev_enumerate_new(udev);
44433ebd ZJS	123	if (udev_enumerate == NULL)
44433ebd ZJS	124	return 1;
912541b0	125
7643ac9a	126	while ((c = getopt_long(argc, argv, "vno:t:c:s:S:a:A:p:g:y:b:h", options, NULL)) >= 0) {
912541b0 KS	127	const char *key;
	128	const char *val;
	129	char buf[UTIL_PATH_SIZE];
	130
7643ac9a	131	switch (c) {
912541b0 KS	132	case 'v':
	133	verbose = 1;
	134	break;
	135	case 'n':
	136	dry_run = 1;
	137	break;
	138	case 't':
44433ebd	139	if (streq(optarg, "devices"))
912541b0	140	device_type = TYPE_DEVICES;
44433ebd	141	else if (streq(optarg, "subsystems"))
912541b0	142	device_type = TYPE_SUBSYSTEMS;
44433ebd	143	else {
9f6445e3	144	log_error("unknown type --type=%s", optarg);
44433ebd	145	return 2;
912541b0 KS	146	}
	147	break;
	148	case 'c':
c5383e79	149	if (!nulstr_contains("add\0" "remove\0" "change\0", optarg)) {
9f6445e3	150	log_error("unknown action '%s'", optarg);
44433ebd ZJS	151	return 2;
44433ebd ZJS	152	} else
c5383e79	153	action = optarg;
44433ebd	154
912541b0 KS	155	break;
912541b0 KS	156	case 's':
56b13bcc TG	157	r = udev_enumerate_add_match_subsystem(udev_enumerate, optarg);
	158	if (r < 0) {
	159	log_error_errno(r, "could not add subsystem match '%s': %m", optarg);
	160	return 2;
	161	}
912541b0 KS	162	break;
912541b0 KS	163	case 'S':
56b13bcc TG	164	r = udev_enumerate_add_nomatch_subsystem(udev_enumerate, optarg);
	165	if (r < 0) {
	166	log_error_errno(r, "could not add negative subsystem match '%s': %m", optarg);
	167	return 2;
	168	}
912541b0 KS	169	break;
	170	case 'a':
	171	key = keyval(optarg, &val, buf, sizeof(buf));
56b13bcc TG	172	r = udev_enumerate_add_match_sysattr(udev_enumerate, key, val);
	173	if (r < 0) {
	174	log_error_errno(r, "could not add sysattr match '%s=%s': %m", key, val);
	175	return 2;
	176	}
912541b0 KS	177	break;
	178	case 'A':
	179	key = keyval(optarg, &val, buf, sizeof(buf));
56b13bcc TG	180	r = udev_enumerate_add_nomatch_sysattr(udev_enumerate, key, val);
	181	if (r < 0) {
	182	log_error_errno(r, "could not add negative sysattr match '%s=%s': %m", key, val);
	183	return 2;
	184	}
912541b0 KS	185	break;
	186	case 'p':
	187	key = keyval(optarg, &val, buf, sizeof(buf));
56b13bcc TG	188	r = udev_enumerate_add_match_property(udev_enumerate, key, val);
	189	if (r < 0) {
	190	log_error_errno(r, "could not add property match '%s=%s': %m", key, val);
	191	return 2;
	192	}
912541b0 KS	193	break;
912541b0 KS	194	case 'g':
56b13bcc TG	195	r = udev_enumerate_add_match_tag(udev_enumerate, optarg);
	196	if (r < 0) {
	197	log_error_errno(r, "could not add tag match '%s': %m", optarg);
	198	return 2;
	199	}
912541b0 KS	200	break;
912541b0 KS	201	case 'y':
56b13bcc TG	202	r = udev_enumerate_add_match_sysname(udev_enumerate, optarg);
	203	if (r < 0) {
	204	log_error_errno(r, "could not add sysname match '%s': %m", optarg);
	205	return 2;
	206	}
912541b0 KS	207	break;
912541b0 KS	208	case 'b': {
d6170d27 ZJS	209	_cleanup_udev_device_unref_ struct udev_device *dev;
	210
	211	dev = find_device(udev, optarg, "/sys");
912541b0	212	if (dev == NULL) {
9f6445e3	213	log_error("unable to open the device '%s'", optarg);
44433ebd	214	return 2;
912541b0	215	}
d6170d27	216
56b13bcc TG	217	r = udev_enumerate_add_match_parent(udev_enumerate, dev);
	218	if (r < 0) {
	219	log_error_errno(r, "could not add parent match '%s': %m", optarg);
	220	return 2;
	221	}
912541b0 KS	222	break;
912541b0 KS	223	}
d6170d27	224
80877656 ZJS	225	case ARG_NAME: {
	226	_cleanup_udev_device_unref_ struct udev_device *dev;
	227
	228	dev = find_device(udev, optarg, "/dev/");
	229	if (dev == NULL) {
	230	log_error("unable to open the device '%s'", optarg);
	231	return 2;
	232	}
	233
56b13bcc TG	234	r = udev_enumerate_add_match_parent(udev_enumerate, dev);
	235	if (r < 0) {
	236	log_error_errno(r, "could not add parent match '%s': %m", optarg);
	237	return 2;
	238	}
80877656 ZJS	239	break;
	240	}
	241
912541b0	242	case 'h':
7643ac9a	243	help();
44433ebd	244	return 0;
7643ac9a	245	case '?':
44433ebd	246	return 1;
7643ac9a ZJS	247	default:
7643ac9a ZJS	248	assert_not_reached("Unknown option");
912541b0 KS	249	}
	250	}
	251
80877656 ZJS	252	for (; optind < argc; optind++) {
	253	_cleanup_udev_device_unref_ struct udev_device *dev;
	254
	255	dev = find_device(udev, argv[optind], NULL);
	256	if (dev == NULL) {
	257	log_error("unable to open the device '%s'", argv[optind]);
	258	return 2;
	259	}
	260
56b13bcc TG	261	r = udev_enumerate_add_match_parent(udev_enumerate, dev);
	262	if (r < 0) {
	263	log_error_errno(r, "could not add tag match '%s': %m", optarg);
	264	return 2;
	265	}
7643ac9a ZJS	266	}
7643ac9a ZJS	267
912541b0 KS	268	switch (device_type) {
	269	case TYPE_SUBSYSTEMS:
	270	udev_enumerate_scan_subsystems(udev_enumerate);
	271	exec_list(udev_enumerate, action);
44433ebd	272	return 0;
912541b0 KS	273	case TYPE_DEVICES:
	274	udev_enumerate_scan_devices(udev_enumerate);
	275	exec_list(udev_enumerate, action);
44433ebd	276	return 0;
912541b0	277	default:
4dd1de72	278	assert_not_reached("device_type");
912541b0	279	}
0d5be398	280	}
1985c76e KS	281
1985c76e KS	282	const struct udevadm_cmd udevadm_trigger = {
912541b0 KS	283	.name = "trigger",
912541b0 KS	284	.cmd = adm_trigger,
5ac0162c	285	.help = "Request events from the kernel",
1985c76e	286	};