mirror of
https://github.com/troglobit/finit.git
synced 2026-10-01 05:22:48 +07:00
Joachim Wiberg
b04dc4d457
The udevd, dbus, bundled watchdog, and others were started without a valid cgroup. This is a workaround to ensure they are assigned one. Signed-off-by: Joachim Wiberg <troglobit@gmail.com>
117 lines
3.4 KiB
C
117 lines
3.4 KiB
C
/* Heuristically find and initialize a suitable hotplug daemon
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*
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* Copyright (c) 2012-2021 Joachim Wiberg <troglobit@gmail.com>
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include <stdio.h>
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#include "config.h"
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#include "conf.h"
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#include "finit.h"
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#include "helpers.h"
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#include "plugin.h"
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#include "service.h"
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static void setup(void *arg)
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{
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char cmd[256];
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char *path;
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if (rescue) {
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_d("Skipping %s plugin in rescue mode.", __FILE__);
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return;
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}
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/*
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* Populate /dev and prepare for runtime events from kernel.
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* Prefer udev if mdev is also available on the system.
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*/
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path = which("udevd");
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if (!path)
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path = which("/lib/systemd/systemd-udevd");
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if (path) {
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/* Register udevd as a monitored service */
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snprintf(cmd, sizeof(cmd), "[S12345789] cgroup.system pid:udevd name:udevd log %s "
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"-- Device event managing daemon", path);
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if (service_register(SVC_TYPE_SERVICE, cmd, global_rlimit, NULL)) {
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_pe("Failed registering %s", path);
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} else {
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snprintf(cmd, sizeof(cmd), "cgroup.init :1 [S] <pid/udevd> log "
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"udevadm trigger -c add -t devices "
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"-- Requesting device events");
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service_register(SVC_TYPE_RUN, cmd, global_rlimit, NULL);
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snprintf(cmd, sizeof(cmd), "cgroup.init :2 [S] <pid/udevd> log "
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"udevadm trigger -c add -t subsystems "
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"-- Requesting subsystem events");
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service_register(SVC_TYPE_RUN, cmd, global_rlimit, NULL);
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}
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free(path);
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/* Debian has this little script to copy generated
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* rules while the system was read-only. TODO: When
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* this functionality was hardcoded in finit.c, this
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* call was made in crank_worker(). Now that
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* filesystems are mounted earlier we should be able
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* to make this call directly after the triggers have
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* run, but this has not been tested AT ALL. */
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if (fexist("/lib/udev/udev-finish"))
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run_interactive("/lib/udev/udev-finish", "Finalizing udev");
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} else {
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path = which("mdev");
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if (path) {
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/* Embedded Linux systems usually have BusyBox mdev */
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if (debug)
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touch("/dev/mdev.log");
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snprintf(cmd, sizeof(cmd), "%s -s", path);
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free(path);
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run_interactive(cmd, "Populating device tree");
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}
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}
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}
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static plugin_t plugin = {
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.name = __FILE__,
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.hook[HOOK_BASEFS_UP] = {
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.cb = setup
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},
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.depends = { "bootmisc" },
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};
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PLUGIN_INIT(plugin_init)
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{
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plugin_register(&plugin);
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}
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PLUGIN_EXIT(plugin_exit)
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{
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plugin_unregister(&plugin);
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}
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/**
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* Local Variables:
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* indent-tabs-mode: t
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* c-file-style: "linux"
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* End:
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*/
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