Re: runit and lsb init script actions

[Charlie Brady <charlieb-smarden-supervision@budge.apana.org.au>]

On Sun, 10 Apr 2005, Gerrit Pape wrote:

> Hi, one thing that has been requested for runit multiple times is lsb
> compliance concerning 'init script' actions, see
>
> http://refspecs.freestandards.org/LSB_2.1.0/LSB-Core-generic/LSB-Core-generic.html#INISCRPTACT
>
> It seems to be quite possible to implement an lsb compliant interface
> through a separate program that runs runsvctrl up, down, term, hup, ...,
> depending on the command line arguments.  For service daemons that don't
> do the right thing on up, down, term, hup, ..., it's possible to
> override the actions through the customized control scripts in
> <service>/control/.  This separate program may be symlinked to
> /etc/init.d/<service>, or used as a wrapper, and maybe fall back to an
> original /etc/init.d/<service> script in case the service doesn't run
> under runit's supervision.
>
> What do you think?

Here's a runit specific version I use under a RedHat based system:

#!/bin/sh

###########################################################################
#
# System V style init script.
# Relies on runit utilities to do the real work.
# It is assumed that init scripts will be linked to this script.
#
###########################################################################

# Determine the service name and its service directory from $0

SERVICE=$(/bin/basename $0 | sed -e 's/^[SK][0-9][0-9]*//')
SERVICE_DIR=/service/$SERVICE

###########################################################################

# Source in the RedHat initscripts functions

. /etc/rc.d/init.d/functions

# The maximum amount of time to wait for a process to shut down, in 
seconds.
WAITMAX=60

start()
{
     /bin/echo -n "Starting $SERVICE:"
     dirs=$1
     if [ -d $1/log ]; then
         dirs="$1/log $1"
     fi
     /usr/bin/runsvctrl u $dirs
     if [ $? -ne 0 ]; then
         failure "Starting $SERVICE"
     else
         success "Starting $SERVICE"
     fi
     /bin/echo
}

status()
{
     /usr/bin/runsvstat $1
}

stop()
{
     /bin/echo -n "Stopping $SERVICE:"
     /usr/bin/svwaitdown -t $WAITMAX $1
     if [ $? -ne 0 ]; then
         failure "Stopping $SERVICE"
     else
         success "Stopping $SERVICE"
     fi
     /bin/echo
}

# This function not only shuts the service down, but removes the /service
# symlink and shuts down the logger. This should only be used during an
# uninstall of the service in question.
svdisable()
{
     /bin/echo -n "Disabling $SERVICE:"
     stop $1
     cd $1 && rm -f $1
     dirs=.
     if [ -e log ]; then
         dirs="$dirs ./log"
     fi
     /usr/bin/runsvctrl d $dirs
     /usr/bin/runsvctrl x $dirs
     if [ $? -ne 0 ]; then
         failure "Disabling $SERVICE"
     else
         success "Disabling $SERVICE"
     fi
     /bin/echo
}

case $1 in

     restart)
         /usr/bin/runsvctrl t $SERVICE_DIR
         /usr/bin/runsvctrl u $SERVICE_DIR
             ;;

     sigalrm)
         /usr/bin/runsvctrl a $SERVICE_DIR
             ;;

     sigcont)
         /usr/bin/runsvctrl c $SERVICE_DIR
             ;;

     sighup)
         /usr/bin/runsvctrl h $SERVICE_DIR
             ;;

     sigusr1)
         /usr/bin/runsvctrl 1 $SERVICE_DIR
             ;;

     sigusr2)
         /usr/bin/runsvctrl 2 $SERVICE_DIR
             ;;

     sigint)
         /usr/bin/runsvctrl i $SERVICE_DIR
             ;;

     sigkill)
         /usr/bin/runsvctrl k $SERVICE_DIR
             ;;

     sigstop)
         /usr/bin/runsvctrl p $SERVICE_DIR
             ;;

     sigterm)
         /usr/bin/runsvctrl t $SERVICE_DIR
             ;;

     status)
         /usr/bin/runsvstat $SERVICE_DIR
             ;;

     start)
         start $SERVICE_DIR
             ;;

     stop)
         stop $SERVICE_DIR
             ;;

     svdisable)
         svdisable $SERVICE_DIR
             ;;

     *)
         echo "usage: $0 {start|stop|restart|status|sigalrm|sigcont|sighup|sigint|sigkill|sigstop|sigterm|sigusr1|sigusr2|svdisable}"
         ;;

esac