mirror of
https://github.com/troglobit/finit.git
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Joachim Wiberg
d22dea74e3
This possible also mitigates the issue tracked in #307. Signed-off-by: Joachim Wiberg <troglobit@gmail.com>
124 lines
3.2 KiB
C
124 lines
3.2 KiB
C
/* Setup and start system hotplug helper mdevd
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*
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* Portions Copyright (c) 2012-2022 Joachim Wiberg <troglobit@gmail.com>
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* Portions Copyright (c) 2022 Andy Savage <andy@savage.hk>
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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 <sys/types.h>
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#ifdef _LIBITE_LITE
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# include <libite/lite.h>
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#else
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# include <lite/lite.h>
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#endif
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#include "finit.h"
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#include "config.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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#include "conf.h"
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#define MDEVD_DAEMON "mdevd"
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/* Rebroadcast events onto nlgroup 4 */
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#define MDEVD_ARGS "-C -O 4"
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#define MDEVD_DESC "MDEVD Extended Hotplug Daemon"
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#ifndef MDEVD_DAEMONUSER
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#define MDEVD_DAEMONUSER "root"
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#endif
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#ifndef MDEVD_DAEMONGROUP
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#define MDEVD_DAEMONGROUP "root"
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#endif
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#ifndef MDEVD_DAEMONPIDFILE
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#define MDEVD_DAEMONPIDFILE "/var/run/mdevd.pid"
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#endif
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static void setup(void *arg)
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{
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char line[256];
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mode_t prev;
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char *cmd;
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FILE *fp;
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if (rescue) {
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dbg("Skipping %s plugin in rescue mode.", __FILE__);
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return;
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}
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cmd = which(MDEVD_DAEMON);
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if (!cmd) {
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dbg("Skipping plugin, %s is not installed.", MDEVD_DAEMON);
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return;
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}
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prev =umask(0);
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/* Clean up from any previous pre-bootstrap run */
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remove(MDEVD_DAEMONPIDFILE);
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/* Set hotplug helper */
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fp = fopen("/proc/sys/kernel/hotplug", "w");
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if (fp) {
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fputc('\n', fp);
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fclose(fp);
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}
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/* Register service with Finit */
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if (debug)
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snprintf(line, sizeof(line), "[S12345789] cgroup.system pid:!%s @%s:%s %s -v3 %s -- %s",
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MDEVD_DAEMONPIDFILE, MDEVD_DAEMONUSER, MDEVD_DAEMONGROUP, cmd, MDEVD_ARGS, MDEVD_DESC);
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else
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snprintf(line, sizeof(line), "[S12345789] cgroup.system pid:!%s @%s:%s %s %s -- %s",
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MDEVD_DAEMONPIDFILE, MDEVD_DAEMONUSER, MDEVD_DAEMONGROUP, cmd, MDEVD_ARGS, MDEVD_DESC);
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if (service_register(SVC_TYPE_SERVICE, line, global_rlimit, NULL))
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err(1, "Failed registering %s", MDEVD_DAEMON);
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free(cmd);
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umask(prev);
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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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