dccca82b1a
log.h really should only include the bare minimum of other headers, as it is really pulled into pretty much everything else and already in itself one of the most basic pieces of code we have. Let's hence drop inclusion of: 1. sd-id128.h because it's entirely unneeded in current log.h 2. errno.h, dito. 3. sys/signalfd.h which we can replace by a simple struct forward declaration 4. process-util.h which was needed for getpid_cached() which we now hide in a funciton log_emergency_level() instead, which nicely abstracts the details away. 5. sys/socket.h which was needed for struct iovec, but a simple struct forward declaration suffices for that too. Ultimately this actually makes our source tree larger (since users of the functionality above must now include it themselves, log.h won't do that for them), but I think it helps to untangle our web of includes a tiny bit. (Background: I'd like to isolate the generic bits of src/basic/ enough so that we can do a git submodule import into casync for it)
179 lines
7 KiB
C
179 lines
7 KiB
C
/* SPDX-License-Identifier: GPL-2.0+ */
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/*
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* Copyright (C) 2005-2011 Kay Sievers <kay@vrfy.org>
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#include <errno.h>
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#include <getopt.h>
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#include <stddef.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include "process-util.h"
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#include "time-util.h"
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#include "udev-util.h"
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#include "udev.h"
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#include "udevadm-util.h"
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static void print_help(void) {
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printf("%s control OPTION\n\n"
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"Control the udev daemon.\n\n"
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" -h --help Show this help\n"
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" -V --version Show package version\n"
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" -e --exit Instruct the daemon to cleanup and exit\n"
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" -l --log-priority=LEVEL Set the udev log level for the daemon\n"
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" -s --stop-exec-queue Do not execute events, queue only\n"
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" -S --start-exec-queue Execute events, flush queue\n"
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" -R --reload Reload rules and databases\n"
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" -p --property=KEY=VALUE Set a global property for all events\n"
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" -m --children-max=N Maximum number of children\n"
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" -t --timeout=SECONDS Maximum time to block for a reply\n"
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, program_invocation_short_name);
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}
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static int adm_control(struct udev *udev, int argc, char *argv[]) {
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_cleanup_udev_ctrl_unref_ struct udev_ctrl *uctrl = NULL;
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int timeout = 60;
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int rc = 1, c;
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static const struct option options[] = {
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{ "exit", no_argument, NULL, 'e' },
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{ "log-priority", required_argument, NULL, 'l' },
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{ "stop-exec-queue", no_argument, NULL, 's' },
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{ "start-exec-queue", no_argument, NULL, 'S' },
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{ "reload", no_argument, NULL, 'R' },
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{ "reload-rules", no_argument, NULL, 'R' }, /* alias for -R */
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{ "property", required_argument, NULL, 'p' },
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{ "env", required_argument, NULL, 'p' }, /* alias for -p */
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{ "children-max", required_argument, NULL, 'm' },
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{ "timeout", required_argument, NULL, 't' },
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{ "version", no_argument, NULL, 'V' },
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{ "help", no_argument, NULL, 'h' },
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{}
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};
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if (must_be_root() < 0)
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return 1;
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uctrl = udev_ctrl_new(udev);
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if (uctrl == NULL)
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return 2;
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while ((c = getopt_long(argc, argv, "el:sSRp:m:t:Vh", options, NULL)) >= 0)
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switch (c) {
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case 'e':
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if (udev_ctrl_send_exit(uctrl, timeout) < 0)
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rc = 2;
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else
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rc = 0;
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break;
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case 'l': {
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int i;
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i = util_log_priority(optarg);
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if (i < 0) {
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log_error("invalid number '%s'", optarg);
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return rc;
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}
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if (udev_ctrl_send_set_log_level(uctrl, util_log_priority(optarg), timeout) < 0)
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rc = 2;
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else
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rc = 0;
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break;
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}
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case 's':
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if (udev_ctrl_send_stop_exec_queue(uctrl, timeout) < 0)
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rc = 2;
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else
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rc = 0;
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break;
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case 'S':
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if (udev_ctrl_send_start_exec_queue(uctrl, timeout) < 0)
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rc = 2;
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else
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rc = 0;
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break;
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case 'R':
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if (udev_ctrl_send_reload(uctrl, timeout) < 0)
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rc = 2;
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else
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rc = 0;
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break;
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case 'p':
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if (strchr(optarg, '=') == NULL) {
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log_error("expect <KEY>=<value> instead of '%s'", optarg);
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return rc;
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}
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if (udev_ctrl_send_set_env(uctrl, optarg, timeout) < 0)
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rc = 2;
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else
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rc = 0;
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break;
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case 'm': {
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char *endp;
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int i;
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i = strtoul(optarg, &endp, 0);
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if (endp[0] != '\0' || i < 1) {
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log_error("invalid number '%s'", optarg);
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return rc;
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}
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if (udev_ctrl_send_set_children_max(uctrl, i, timeout) < 0)
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rc = 2;
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else
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rc = 0;
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break;
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}
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case 't': {
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usec_t s;
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int seconds;
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int r;
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r = parse_sec(optarg, &s);
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if (r < 0)
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return log_error_errno(r, "Failed to parse timeout value '%s'.", optarg);
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if (((s + USEC_PER_SEC - 1) / USEC_PER_SEC) > INT_MAX)
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log_error("Timeout value is out of range.");
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else {
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seconds = s != USEC_INFINITY ? (int) ((s + USEC_PER_SEC - 1) / USEC_PER_SEC) : INT_MAX;
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timeout = seconds;
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rc = 0;
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}
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break;
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}
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case 'V':
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print_version();
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rc = 0;
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break;
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case 'h':
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print_help();
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rc = 0;
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break;
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}
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if (optind < argc)
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log_error("Extraneous argument: %s", argv[optind]);
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else if (optind == 1)
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log_error("Option missing");
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return rc;
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}
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const struct udevadm_cmd udevadm_control = {
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.name = "control",
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.cmd = adm_control,
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.help = "Control the udev daemon",
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};
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