openwrt/package/base-files/files/etc/rc.common
Linus Kardell 2ac1a57677 base-files: fix unkillable processes after restart
When restart is run on an init script, the script traps SIGTERM. This is
done as a workaround for scripts named the same name as the program they
start. In that case, the init script process will have the same name as
the program process, and so when the init script runs killall, it will
kill itself. So SIGTERM is trapped to make the init script unkillable.

However, the trap is retained when the init script runs start, and thus
processes started by restart will not respond to SIGTERM, and will thus
be unkillable unless you use SIGKILL. This fixes that by removing the
trap before running start.

Signed-off-by: Linus Kardell <linus@telliq.com>
2018-11-22 13:15:10 +01:00

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#!/bin/sh
# Copyright (C) 2006-2012 OpenWrt.org
. $IPKG_INSTROOT/lib/functions.sh
. $IPKG_INSTROOT/lib/functions/service.sh
initscript=$1
action=${2:-help}
shift 2
start() {
return 0
}
stop() {
return 0
}
reload() {
restart
}
restart() {
trap '' TERM
stop "$@"
trap - TERM
start "$@"
}
boot() {
start "$@"
}
shutdown() {
stop
}
disable() {
name="$(basename "${initscript}")"
rm -f "$IPKG_INSTROOT"/etc/rc.d/S??$name
rm -f "$IPKG_INSTROOT"/etc/rc.d/K??$name
}
enable() {
err=1
name="$(basename "${initscript}")"
[ "$START" ] && \
ln -sf "../init.d/$name" "$IPKG_INSTROOT/etc/rc.d/S${START}${name##S[0-9][0-9]}" && \
err=0
[ "$STOP" ] && \
ln -sf "../init.d/$name" "$IPKG_INSTROOT/etc/rc.d/K${STOP}${name##K[0-9][0-9]}" && \
err=0
return $err
}
enabled() {
name="$(basename "${initscript}")"
[ -x "$IPKG_INSTROOT/etc/rc.d/S${START}${name##S[0-9][0-9]}" ]
}
depends() {
return 0
}
help() {
cat <<EOF
Syntax: $initscript [command]
Available commands:
start Start the service
stop Stop the service
restart Restart the service
reload Reload configuration files (or restart if service does not implement reload)
enable Enable service autostart
disable Disable service autostart
$EXTRA_HELP
EOF
}
# for procd
start_service() {
return 0
}
stop_service() {
return 0
}
service_triggers() {
return 0
}
service_data() {
return 0
}
service_running() {
return 0
}
${INIT_TRACE:+set -x}
. "$initscript"
[ -n "$USE_PROCD" ] && {
EXTRA_COMMANDS="${EXTRA_COMMANDS} running trace"
. $IPKG_INSTROOT/lib/functions/procd.sh
basescript=$(readlink "$initscript")
rc_procd() {
local method="set"
[ -n "$2" ] && method="add"
procd_open_service "$(basename ${basescript:-$initscript})" "$initscript"
"$@"
procd_close_service "$method"
}
start() {
rc_procd start_service "$@"
if eval "type service_started" 2>/dev/null >/dev/null; then
service_started
fi
}
trace() {
TRACE_SYSCALLS=1
start "$@"
}
stop() {
procd_lock
stop_service "$@"
procd_kill "$(basename ${basescript:-$initscript})" "$1"
}
reload() {
if eval "type reload_service" 2>/dev/null >/dev/null; then
procd_lock
reload_service "$@"
else
start
fi
}
running() {
service_running "$@"
}
}
ALL_COMMANDS="start stop reload restart boot shutdown enable disable enabled depends ${EXTRA_COMMANDS}"
list_contains ALL_COMMANDS "$action" || action=help
$action "$@"