| /* |
| * 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 (!STR_IN_SET(optarg, "add", "remove", "change")) { |
| 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", |
| }; |