From 55944e5e40b1be2afc4855d8d2baf4b73d1876b5 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Wed, 10 Apr 2024 22:49:52 +0200 Subject: Adding upstream version 255.4. Signed-off-by: Daniel Baumann --- src/udev/udevadm-control.c | 239 +++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 239 insertions(+) create mode 100644 src/udev/udevadm-control.c (limited to 'src/udev/udevadm-control.c') diff --git a/src/udev/udevadm-control.c b/src/udev/udevadm-control.c new file mode 100644 index 0000000..64615f5 --- /dev/null +++ b/src/udev/udevadm-control.c @@ -0,0 +1,239 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ +/* + * 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 "parse-util.h" +#include "process-util.h" +#include "static-destruct.h" +#include "strv.h" +#include "syslog-util.h" +#include "time-util.h" +#include "udevadm.h" +#include "udev-ctrl.h" +#include "virt.h" + +static char **arg_env = NULL; +static usec_t arg_timeout = 60 * USEC_PER_SEC; +static bool arg_ping = false; +static bool arg_reload = false; +static bool arg_exit = false; +static int arg_max_children = -1; +static int arg_log_level = -1; +static int arg_start_exec_queue = -1; + +STATIC_DESTRUCTOR_REGISTER(arg_env, strv_freep); + +static int 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-level=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" + " --ping Wait for udev to respond to a ping message\n" + " -t --timeout=SECONDS Maximum time to block for a reply\n", + program_invocation_short_name); + + return 0; +} + +static int parse_argv(int argc, char *argv[]) { + enum { + ARG_PING = 0x100, + }; + + static const struct option options[] = { + { "exit", no_argument, NULL, 'e' }, + { "log-level", required_argument, NULL, 'l' }, + { "log-priority", required_argument, NULL, 'l' }, /* for backward compatibility */ + { "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' }, + { "ping", no_argument, NULL, ARG_PING }, + { "timeout", required_argument, NULL, 't' }, + { "version", no_argument, NULL, 'V' }, + { "help", no_argument, NULL, 'h' }, + {} + }; + + int c, r; + + assert(argc >= 0); + assert(argv); + + if (argc <= 1) + return log_error_errno(SYNTHETIC_ERRNO(EINVAL), + "This command expects one or more options."); + + while ((c = getopt_long(argc, argv, "el:sSRp:m:t:Vh", options, NULL)) >= 0) + switch (c) { + + case 'e': + arg_exit = true; + break; + + case 'l': + arg_log_level = log_level_from_string(optarg); + if (arg_log_level < 0) + return log_error_errno(arg_log_level, "Failed to parse log level '%s': %m", optarg); + break; + + case 's': + arg_start_exec_queue = false; + break; + + case 'S': + arg_start_exec_queue = true; + break; + + case 'R': + arg_reload = true; + break; + + case 'p': + if (!strchr(optarg, '=')) + return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "expect = instead of '%s'", optarg); + + r = strv_extend(&arg_env, optarg); + if (r < 0) + return log_error_errno(r, "Failed to extend environment: %m"); + + break; + + case 'm': { + unsigned i; + r = safe_atou(optarg, &i); + if (r < 0) + return log_error_errno(r, "Failed to parse maximum number of children '%s': %m", optarg); + arg_max_children = i; + break; + } + + case ARG_PING: + arg_ping = true; + break; + + case 't': + r = parse_sec(optarg, &arg_timeout); + if (r < 0) + return log_error_errno(r, "Failed to parse timeout value '%s': %m", optarg); + break; + + case 'V': + return print_version(); + + case 'h': + return help(); + + case '?': + return -EINVAL; + + default: + assert_not_reached(); + } + + if (optind < argc) + return log_error_errno(SYNTHETIC_ERRNO(EINVAL), + "Extraneous argument: %s", argv[optind]); + + return 1; +} + +int control_main(int argc, char *argv[], void *userdata) { + _cleanup_(udev_ctrl_unrefp) UdevCtrl *uctrl = NULL; + int r; + + if (running_in_chroot() > 0) { + log_info("Running in chroot, ignoring request."); + return 0; + } + + r = parse_argv(argc, argv); + if (r <= 0) + return r; + + r = udev_ctrl_new(&uctrl); + if (r < 0) + return log_error_errno(r, "Failed to initialize udev control: %m"); + + if (arg_exit) { + r = udev_ctrl_send_exit(uctrl); + if (r < 0) + return log_error_errno(r, "Failed to send exit request: %m"); + return 0; + } + + if (arg_log_level >= 0) { + r = udev_ctrl_send_set_log_level(uctrl, arg_log_level); + if (r < 0) + return log_error_errno(r, "Failed to send request to set log level: %m"); + } + + if (arg_start_exec_queue == false) { + r = udev_ctrl_send_stop_exec_queue(uctrl); + if (r < 0) + return log_error_errno(r, "Failed to send request to stop exec queue: %m"); + } + + if (arg_start_exec_queue == true) { + r = udev_ctrl_send_start_exec_queue(uctrl); + if (r < 0) + return log_error_errno(r, "Failed to send request to start exec queue: %m"); + } + + if (arg_reload) { + r = udev_ctrl_send_reload(uctrl); + if (r < 0) + return log_error_errno(r, "Failed to send reload request: %m"); + } + + STRV_FOREACH(env, arg_env) { + r = udev_ctrl_send_set_env(uctrl, *env); + if (r < 0) + return log_error_errno(r, "Failed to send request to update environment: %m"); + } + + if (arg_max_children >= 0) { + r = udev_ctrl_send_set_children_max(uctrl, arg_max_children); + if (r < 0) + return log_error_errno(r, "Failed to send request to set number of children: %m"); + } + + if (arg_ping) { + r = udev_ctrl_send_ping(uctrl); + if (r < 0) + return log_error_errno(r, "Failed to send a ping message: %m"); + } + + r = udev_ctrl_wait(uctrl, arg_timeout); + if (r < 0) + return log_error_errno(r, "Failed to wait for daemon to reply: %m"); + + return 0; +} -- cgit v1.2.3