/* SPDX-License-Identifier: GPL-2.0+ */ /* * * 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 #include #include #include #include #include #include #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 = 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", };