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

/* SPDX-License-Identifier: GPL-2.0+ */

#include <errno.h>
#include <getopt.h>

#include "sd-device.h"
#include "sd-event.h"

#include "device-enumerator-private.h"
#include "fd-util.h"
#include "path-util.h"
#include "set.h"
#include "string-util.h"
#include "strv.h"
#include "udevadm.h"
#include "udevadm-util.h"

static bool arg_verbose = false;
static bool arg_dry_run = false;

static int exec_list(sd_device_enumerator *e, const char *action, Set *settle_set) {
        sd_device *d;
        int r;

        FOREACH_DEVICE_AND_SUBSYSTEM(e, d) {
                _cleanup_free_ char *filename = NULL;
                _cleanup_close_ int fd = -1;
                const char *syspath;

                if (sd_device_get_syspath(d, &syspath) < 0)
                        continue;

                if (arg_verbose)
                        printf("%s\n", syspath);
                if (arg_dry_run)
                        continue;

                filename = path_join(NULL, syspath, "uevent");
                if (!filename)
                        return log_oom();

                fd = open(filename, O_WRONLY|O_CLOEXEC);
                if (fd < 0)
                        continue;

                if (settle_set) {
                        r = set_put_strdup(settle_set, syspath);
                        if (r < 0)
                                return log_oom();
                }

                if (write(fd, action, strlen(action)) < 0)
                        log_debug_errno(errno, "Failed to write '%s' to '%s', ignoring: %m", action, filename);
        }

        return 0;
}

static int device_monitor_handler(sd_device_monitor *m, sd_device *dev, void *userdata) {
        Set *settle_set = userdata;
        const char *syspath;

        assert(dev);
        assert(settle_set);

        if (sd_device_get_syspath(dev, &syspath) < 0)
                return 0;

        if (arg_verbose)
                printf("settle %s\n", syspath);

        if (!set_remove(settle_set, syspath))
                log_debug("Got epoll event on syspath %s not present in syspath set", syspath);

        if (set_isempty(settle_set))
                return sd_event_exit(sd_device_monitor_get_event(m), 0);

        return 0;
}

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

        buf = strdup(str);
        if (!buf)
                return NULL;

        pos = strchr(buf, '=');
        if (pos) {
                pos[0] = 0;
                pos++;
        }

        *key = buf;
        *val = pos;

        return buf;
}

static int help(void) {
        printf("%s trigger [OPTIONS] DEVPATH\n\n"
               "Request events from the kernel.\n\n"
               "  -h --help                         Show this help\n"
               "  -V --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"
               "  -w --settle                       Wait for the triggered events to complete\n"
               , program_invocation_short_name);

        return 0;
}

int trigger_main(int argc, char *argv[], void *userdata) {
        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'      },
                { "settle",            no_argument,       NULL, 'w'      },
                { "version",           no_argument,       NULL, 'V'      },
                { "help",              no_argument,       NULL, 'h'      },
                {}
        };
        enum {
                TYPE_DEVICES,
                TYPE_SUBSYSTEMS,
        } device_type = TYPE_DEVICES;
        const char *action = "change";
        _cleanup_(sd_device_enumerator_unrefp) sd_device_enumerator *e = NULL;
        _cleanup_(sd_device_monitor_unrefp) sd_device_monitor *m = NULL;
        _cleanup_(sd_event_unrefp) sd_event *event = NULL;
        _cleanup_set_free_free_ Set *settle_set = NULL;
        bool settle = false;
        int c, r;

        r = sd_device_enumerator_new(&e);
        if (r < 0)
                return r;

        r = sd_device_enumerator_allow_uninitialized(e);
        if (r < 0)
                return r;

        while ((c = getopt_long(argc, argv, "vnt:c:s:S:a:A:p:g:y:b:wVh", options, NULL)) >= 0) {
                _cleanup_free_ char *buf = NULL;
                const char *key, *val;

                switch (c) {
                case 'v':
                        arg_verbose = true;
                        break;
                case 'n':
                        arg_dry_run = true;
                        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 -EINVAL;
                        }
                        break;
                case 'c':
                        if (STR_IN_SET(optarg, "add", "remove", "change"))
                                action = optarg;
                        else {
                                log_error("Unknown action '%s'", optarg);
                                return -EINVAL;
                        }

                        break;
                case 's':
                        r = sd_device_enumerator_add_match_subsystem(e, optarg, true);
                        if (r < 0)
                                return log_error_errno(r, "Failed to add subsystem match '%s': %m", optarg);
                        break;
                case 'S':
                        r = sd_device_enumerator_add_match_subsystem(e, optarg, false);
                        if (r < 0)
                                return log_error_errno(r, "Failed to add negative subsystem match '%s': %m", optarg);
                        break;
                case 'a':
                        buf = keyval(optarg, &key, &val);
                        if (!buf)
                                return log_oom();
                        r = sd_device_enumerator_add_match_sysattr(e, key, val, true);
                        if (r < 0)
                                return log_error_errno(r, "Failed to add sysattr match '%s=%s': %m", key, val);
                        break;
                case 'A':
                        buf = keyval(optarg, &key, &val);
                        if (!buf)
                                return log_oom();
                        r = sd_device_enumerator_add_match_sysattr(e, key, val, false);
                        if (r < 0)
                                return log_error_errno(r, "Failed to add negative sysattr match '%s=%s': %m", key, val);
                        break;
                case 'p':
                        buf = keyval(optarg, &key, &val);
                        if (!buf)
                                return log_oom();
                        r = sd_device_enumerator_add_match_property(e, key, val);
                        if (r < 0)
                                return log_error_errno(r, "Failed to add property match '%s=%s': %m", key, val);
                        break;
                case 'g':
                        r = sd_device_enumerator_add_match_tag(e, optarg);
                        if (r < 0)
                                return log_error_errno(r, "Failed to add tag match '%s': %m", optarg);
                        break;
                case 'y':
                        r = sd_device_enumerator_add_match_sysname(e, optarg);
                        if (r < 0)
                                return log_error_errno(r, "Failed to add sysname match '%s': %m", optarg);
                        break;
                case 'b': {
                        _cleanup_(sd_device_unrefp) sd_device *dev = NULL;

                        r = find_device(optarg, "/sys", &dev);
                        if (r < 0)
                                return log_error_errno(r, "Failed to open the device '%s': %m", optarg);

                        r = sd_device_enumerator_add_match_parent(e, dev);
                        if (r < 0)
                                return log_error_errno(r, "Failed to add parent match '%s': %m", optarg);
                        break;
                }
                case 'w':
                        settle = true;
                        break;

                case ARG_NAME: {
                        _cleanup_(sd_device_unrefp) sd_device *dev = NULL;

                        r = find_device(optarg, "/dev/", &dev);
                        if (r < 0)
                                return log_error_errno(r, "Failed to open the device '%s': %m", optarg);

                        r = sd_device_enumerator_add_match_parent(e, dev);
                        if (r < 0)
                                return log_error_errno(r, "Failed to add parent match '%s': %m", optarg);
                        break;
                }

                case 'V':
                        return print_version();
                case 'h':
                        return help();
                case '?':
                        return -EINVAL;
                default:
                        assert_not_reached("Unknown option");
                }
        }

        for (; optind < argc; optind++) {
                _cleanup_(sd_device_unrefp) sd_device *dev = NULL;

                r = find_device(argv[optind], NULL, &dev);
                if (r < 0)
                        return log_error_errno(r, "Failed to open the device '%s': %m", argv[optind]);

                r = sd_device_enumerator_add_match_parent(e, dev);
                if (r < 0)
                        return log_error_errno(r, "Failed to add parent match '%s': %m", argv[optind]);
        }

        if (settle) {
                settle_set = set_new(&string_hash_ops);
                if (!settle_set)
                        return log_oom();

                r = sd_event_default(&event);
                if (r < 0)
                        return log_error_errno(r, "Failed to get default event: %m");

                r = sd_device_monitor_new(&m);
                if (r < 0)
                        return log_error_errno(r, "Failed to create device monitor object: %m");

                r = sd_device_monitor_attach_event(m, event, 0);
                if (r < 0)
                        return log_error_errno(r, "Failed to attach event to device monitor: %m");

                r = sd_device_monitor_start(m, device_monitor_handler, settle_set, "udevadm-trigger-device-monitor");
                if (r < 0)
                        return log_error_errno(r, "Failed to start device monitor: %m");
        }

        switch (device_type) {
        case TYPE_SUBSYSTEMS:
                r = device_enumerator_scan_subsystems(e);
                if (r < 0)
                        return log_error_errno(r, "Failed to scan subsystems: %m");
                break;
        case TYPE_DEVICES:
                r = device_enumerator_scan_devices(e);
                if (r < 0)
                        return log_error_errno(r, "Failed to scan devices: %m");
                break;
        default:
                assert_not_reached("Unknown device type");
        }
        r = exec_list(e, action, settle_set);
        if (r < 0)
                return r;

        if (event && !set_isempty(settle_set)) {
                r = sd_event_loop(event);
                if (r < 0)
                        return log_error_errno(r, "Event loop failed: %m");
        }

        return 0;
}
Commit	Line	Data
e7145211	1	/* SPDX-License-Identifier: GPL-2.0+ */
0d5be398	2
07630cea	3	#include <errno.h>
07630cea	4	#include <getopt.h>
fb3d8e9f YW	5
	6	#include "sd-device.h"
	7	#include "sd-event.h"
0d5be398	8
13aca847	9	#include "device-enumerator-private.h"
792cc203	10	#include "fd-util.h"
c7d942d6	11	#include "path-util.h"
792cc203	12	#include "set.h"
07630cea	13	#include "string-util.h"
13aca847	14	#include "strv.h"
3d05193e	15	#include "udevadm.h"
d6170d27	16	#include "udevadm-util.h"
0d5be398	17
13aca847 YW	18	static bool arg_verbose = false;
13aca847 YW	19	static bool arg_dry_run = false;
c48622cc	20
13aca847 YW	21	static int exec_list(sd_device_enumerator e, const char action, Set *settle_set) {
13aca847 YW	22	sd_device *d;
6bcc09be	23	int r;
912541b0	24
13aca847	25	FOREACH_DEVICE_AND_SUBSYSTEM(e, d) {
c7d942d6	26	_cleanup_free_ char *filename = NULL;
1b113391	27	_cleanup_close_ int fd = -1;
c7d942d6	28	const char *syspath;
912541b0	29
13aca847 YW	30	if (sd_device_get_syspath(d, &syspath) < 0)
	31	continue;
	32
	33	if (arg_verbose)
792cc203	34	printf("%s\n", syspath);
13aca847	35	if (arg_dry_run)
912541b0	36	continue;
792cc203	37
c7d942d6 YW	38	filename = path_join(NULL, syspath, "uevent");
	39	if (!filename)
	40	return log_oom();
	41
c8a202b7	42	fd = open(filename, O_WRONLY\|O_CLOEXEC);
baa30fbc	43	if (fd < 0)
912541b0	44	continue;
1b113391	45
6bcc09be ZJS	46	if (settle_set) {
	47	r = set_put_strdup(settle_set, syspath);
	48	if (r < 0)
	49	return log_oom();
	50	}
1b113391	51
912541b0	52	if (write(fd, action, strlen(action)) < 0)
c7d942d6	53	log_debug_errno(errno, "Failed to write '%s' to '%s', ignoring: %m", action, filename);
912541b0	54	}
6bcc09be ZJS	55
6bcc09be ZJS	56	return 0;
0d5be398 KS	57	}
0d5be398 KS	58
fb3d8e9f YW	59	static int device_monitor_handler(sd_device_monitor m, sd_device dev, void *userdata) {
	60	Set *settle_set = userdata;
	61	const char *syspath;
	62
	63	assert(dev);
	64	assert(settle_set);
	65
	66	if (sd_device_get_syspath(dev, &syspath) < 0)
	67	return 0;
	68
	69	if (arg_verbose)
	70	printf("settle %s\n", syspath);
	71
	72	if (!set_remove(settle_set, syspath))
	73	log_debug("Got epoll event on syspath %s not present in syspath set", syspath);
	74
	75	if (set_isempty(settle_set))
	76	return sd_event_exit(sd_device_monitor_get_event(m), 0);
	77
	78	return 0;
	79	}
	80
c7d942d6 YW	81	static char* keyval(const char str, const char key, const char *val) {
	82	char buf, pos;
	83
	84	buf = strdup(str);
	85	if (!buf)
	86	return NULL;
912541b0	87
912541b0	88	pos = strchr(buf, '=');
c7d942d6	89	if (pos) {
912541b0 KS	90	pos[0] = 0;
	91	pos++;
	92	}
c7d942d6 YW	93
c7d942d6 YW	94	*key = buf;
912541b0	95	*val = pos;
c7d942d6	96
912541b0	97	return buf;
80381823 KS	98	}
80381823 KS	99
bb084d42	100	static int help(void) {
5639df9a	101	printf("%s trigger [OPTIONS] DEVPATH\n\n"
5ac0162c LP	102	"Request events from the kernel.\n\n"
5ac0162c LP	103	" -h --help Show this help\n"
5639df9a	104	" -V --version Show package version\n"
5ac0162c LP	105	" -v --verbose Print the list of devices while running\n"
	106	" -n --dry-run Do not actually trigger the events\n"
	107	" -t --type= Type of events to trigger\n"
	108	" devices sysfs devices (default)\n"
	109	" subsystems sysfs subsystems and drivers\n"
	110	" -c --action=ACTION Event action value, default is \"change\"\n"
	111	" -s --subsystem-match=SUBSYSTEM Trigger devices from a matching subsystem\n"
	112	" -S --subsystem-nomatch=SUBSYSTEM Exclude devices from a matching subsystem\n"
	113	" -a --attr-match=FILE[=VALUE] Trigger devices with a matching attribute\n"
	114	" -A --attr-nomatch=FILE[=VALUE] Exclude devices with a matching attribute\n"
	115	" -p --property-match=KEY=VALUE Trigger devices with a matching property\n"
	116	" -g --tag-match=KEY=VALUE Trigger devices with a matching property\n"
	117	" -y --sysname-match=NAME Trigger devices with this /sys path\n"
	118	" --name-match=NAME Trigger devices with this /dev name\n"
	119	" -b --parent-match=NAME Trigger devices with that parent device\n"
792cc203	120	" -w --settle Wait for the triggered events to complete\n"
5ac0162c	121	, program_invocation_short_name);
bb084d42 YW	122
bb084d42 YW	123	return 0;
7643ac9a ZJS	124	}
7643ac9a ZJS	125
3d05193e	126	int trigger_main(int argc, char argv[], void userdata) {
80877656 ZJS	127	enum {
	128	ARG_NAME = 0x100,
	129	};
	130
912541b0	131	static const struct option options[] = {
80877656 ZJS	132	{ "verbose", no_argument, NULL, 'v' },
	133	{ "dry-run", no_argument, NULL, 'n' },
	134	{ "type", required_argument, NULL, 't' },
	135	{ "action", required_argument, NULL, 'c' },
	136	{ "subsystem-match", required_argument, NULL, 's' },
	137	{ "subsystem-nomatch", required_argument, NULL, 'S' },
	138	{ "attr-match", required_argument, NULL, 'a' },
	139	{ "attr-nomatch", required_argument, NULL, 'A' },
	140	{ "property-match", required_argument, NULL, 'p' },
	141	{ "tag-match", required_argument, NULL, 'g' },
	142	{ "sysname-match", required_argument, NULL, 'y' },
	143	{ "name-match", required_argument, NULL, ARG_NAME },
	144	{ "parent-match", required_argument, NULL, 'b' },
792cc203	145	{ "settle", no_argument, NULL, 'w' },
5639df9a	146	{ "version", no_argument, NULL, 'V' },
80877656	147	{ "help", no_argument, NULL, 'h' },
912541b0 KS	148	{}
	149	};
	150	enum {
	151	TYPE_DEVICES,
	152	TYPE_SUBSYSTEMS,
	153	} device_type = TYPE_DEVICES;
	154	const char *action = "change";
13aca847	155	_cleanup_(sd_device_enumerator_unrefp) sd_device_enumerator *e = NULL;
f8d596cd	156	_cleanup_(sd_device_monitor_unrefp) sd_device_monitor *m = NULL;
fb3d8e9f	157	_cleanup_(sd_event_unrefp) sd_event *event = NULL;
f8d596cd	158	_cleanup_set_free_free_ Set *settle_set = NULL;
792cc203	159	bool settle = false;
fb3d8e9f	160	int c, r;
912541b0	161
13aca847 YW	162	r = sd_device_enumerator_new(&e);
	163	if (r < 0)
	164	return r;
	165
	166	r = sd_device_enumerator_allow_uninitialized(e);
	167	if (r < 0)
	168	return r;
912541b0	169
792cc203	170	while ((c = getopt_long(argc, argv, "vnt:c:s:S:a:A:p:g:y:b:wVh", options, NULL)) >= 0) {
c7d942d6 YW	171	_cleanup_free_ char *buf = NULL;
c7d942d6 YW	172	const char key, val;
912541b0	173
7643ac9a	174	switch (c) {
912541b0	175	case 'v':
13aca847	176	arg_verbose = true;
912541b0 KS	177	break;
912541b0 KS	178	case 'n':
13aca847	179	arg_dry_run = true;
912541b0 KS	180	break;
912541b0 KS	181	case 't':
44433ebd	182	if (streq(optarg, "devices"))
912541b0	183	device_type = TYPE_DEVICES;
44433ebd	184	else if (streq(optarg, "subsystems"))
912541b0	185	device_type = TYPE_SUBSYSTEMS;
44433ebd	186	else {
c7d942d6	187	log_error("Unknown type --type=%s", optarg);
bb084d42	188	return -EINVAL;
912541b0 KS	189	}
	190	break;
	191	case 'c':
bb084d42	192	if (STR_IN_SET(optarg, "add", "remove", "change"))
c5383e79	193	action = optarg;
bb084d42	194	else {
c7d942d6	195	log_error("Unknown action '%s'", optarg);
bb084d42 YW	196	return -EINVAL;
bb084d42 YW	197	}
44433ebd	198
912541b0 KS	199	break;
912541b0 KS	200	case 's':
13aca847	201	r = sd_device_enumerator_add_match_subsystem(e, optarg, true);
bb084d42	202	if (r < 0)
c7d942d6	203	return log_error_errno(r, "Failed to add subsystem match '%s': %m", optarg);
912541b0 KS	204	break;
912541b0 KS	205	case 'S':
13aca847	206	r = sd_device_enumerator_add_match_subsystem(e, optarg, false);
bb084d42	207	if (r < 0)
c7d942d6	208	return log_error_errno(r, "Failed to add negative subsystem match '%s': %m", optarg);
912541b0 KS	209	break;
912541b0 KS	210	case 'a':
c7d942d6 YW	211	buf = keyval(optarg, &key, &val);
	212	if (!buf)
	213	return log_oom();
13aca847	214	r = sd_device_enumerator_add_match_sysattr(e, key, val, true);
bb084d42	215	if (r < 0)
c7d942d6	216	return log_error_errno(r, "Failed to add sysattr match '%s=%s': %m", key, val);
912541b0 KS	217	break;
912541b0 KS	218	case 'A':
c7d942d6 YW	219	buf = keyval(optarg, &key, &val);
	220	if (!buf)
	221	return log_oom();
13aca847	222	r = sd_device_enumerator_add_match_sysattr(e, key, val, false);
bb084d42	223	if (r < 0)
c7d942d6	224	return log_error_errno(r, "Failed to add negative sysattr match '%s=%s': %m", key, val);
912541b0 KS	225	break;
912541b0 KS	226	case 'p':
c7d942d6 YW	227	buf = keyval(optarg, &key, &val);
	228	if (!buf)
	229	return log_oom();
13aca847	230	r = sd_device_enumerator_add_match_property(e, key, val);
bb084d42	231	if (r < 0)
c7d942d6	232	return log_error_errno(r, "Failed to add property match '%s=%s': %m", key, val);
912541b0 KS	233	break;
912541b0 KS	234	case 'g':
13aca847	235	r = sd_device_enumerator_add_match_tag(e, optarg);
bb084d42	236	if (r < 0)
c7d942d6	237	return log_error_errno(r, "Failed to add tag match '%s': %m", optarg);
912541b0 KS	238	break;
912541b0 KS	239	case 'y':
13aca847	240	r = sd_device_enumerator_add_match_sysname(e, optarg);
bb084d42	241	if (r < 0)
c7d942d6	242	return log_error_errno(r, "Failed to add sysname match '%s': %m", optarg);
912541b0 KS	243	break;
912541b0 KS	244	case 'b': {
13aca847	245	_cleanup_(sd_device_unrefp) sd_device *dev = NULL;
d6170d27	246
13aca847 YW	247	r = find_device(optarg, "/sys", &dev);
13aca847 YW	248	if (r < 0)
c7d942d6	249	return log_error_errno(r, "Failed to open the device '%s': %m", optarg);
d6170d27	250
13aca847	251	r = sd_device_enumerator_add_match_parent(e, dev);
bb084d42	252	if (r < 0)
c7d942d6	253	return log_error_errno(r, "Failed to add parent match '%s': %m", optarg);
912541b0 KS	254	break;
912541b0 KS	255	}
792cc203 MH	256	case 'w':
	257	settle = true;
	258	break;
d6170d27	259
80877656	260	case ARG_NAME: {
13aca847	261	_cleanup_(sd_device_unrefp) sd_device *dev = NULL;
80877656	262
13aca847 YW	263	r = find_device(optarg, "/dev/", &dev);
13aca847 YW	264	if (r < 0)
c7d942d6	265	return log_error_errno(r, "Failed to open the device '%s': %m", optarg);
80877656	266
13aca847	267	r = sd_device_enumerator_add_match_parent(e, dev);
bb084d42	268	if (r < 0)
c7d942d6	269	return log_error_errno(r, "Failed to add parent match '%s': %m", optarg);
80877656 ZJS	270	break;
	271	}
	272
5639df9a	273	case 'V':
51b006e1	274	return print_version();
912541b0	275	case 'h':
bb084d42	276	return help();
7643ac9a	277	case '?':
bb084d42	278	return -EINVAL;
7643ac9a ZJS	279	default:
7643ac9a ZJS	280	assert_not_reached("Unknown option");
912541b0 KS	281	}
	282	}
	283
80877656	284	for (; optind < argc; optind++) {
13aca847	285	_cleanup_(sd_device_unrefp) sd_device *dev = NULL;
80877656	286
13aca847 YW	287	r = find_device(argv[optind], NULL, &dev);
13aca847 YW	288	if (r < 0)
c7d942d6	289	return log_error_errno(r, "Failed to open the device '%s': %m", argv[optind]);
80877656	290
13aca847	291	r = sd_device_enumerator_add_match_parent(e, dev);
bb084d42	292	if (r < 0)
c7d942d6	293	return log_error_errno(r, "Failed to add parent match '%s': %m", argv[optind]);
7643ac9a ZJS	294	}
7643ac9a ZJS	295
792cc203	296	if (settle) {
fb3d8e9f YW	297	settle_set = set_new(&string_hash_ops);
	298	if (!settle_set)
	299	return log_oom();
	300
	301	r = sd_event_default(&event);
	302	if (r < 0)
	303	return log_error_errno(r, "Failed to get default event: %m");
792cc203	304
f8d596cd YW	305	r = sd_device_monitor_new(&m);
	306	if (r < 0)
	307	return log_error_errno(r, "Failed to create device monitor object: %m");
bb084d42	308
fb3d8e9f	309	r = sd_device_monitor_attach_event(m, event, 0);
bb084d42	310	if (r < 0)
fb3d8e9f	311	return log_error_errno(r, "Failed to attach event to device monitor: %m");
792cc203	312
fb3d8e9f YW	313	r = sd_device_monitor_start(m, device_monitor_handler, settle_set, "udevadm-trigger-device-monitor");
	314	if (r < 0)
	315	return log_error_errno(r, "Failed to start device monitor: %m");
792cc203 MH	316	}
792cc203 MH	317
912541b0 KS	318	switch (device_type) {
912541b0 KS	319	case TYPE_SUBSYSTEMS:
13aca847 YW	320	r = device_enumerator_scan_subsystems(e);
	321	if (r < 0)
	322	return log_error_errno(r, "Failed to scan subsystems: %m");
792cc203	323	break;
912541b0	324	case TYPE_DEVICES:
13aca847 YW	325	r = device_enumerator_scan_devices(e);
	326	if (r < 0)
	327	return log_error_errno(r, "Failed to scan devices: %m");
792cc203	328	break;
912541b0	329	default:
c7d942d6	330	assert_not_reached("Unknown device type");
912541b0	331	}
13aca847	332	r = exec_list(e, action, settle_set);
6bcc09be	333	if (r < 0)
bb084d42	334	return r;
792cc203	335
fb3d8e9f YW	336	if (event && !set_isempty(settle_set)) {
	337	r = sd_event_loop(event);
	338	if (r < 0)
	339	return log_error_errno(r, "Event loop failed: %m");
792cc203 MH	340	}
	341
	342	return 0;
0d5be398	343	}