Fichier /etc/init.d/function

Linux: RedHat

#!/bin/sh
#
# functions	This file contains functions to be used by most or all
#		shell scripts in the /etc/init.d directory.
#
# Version:	@(#) /etc/init.d/functions 1.01 26-Oct-1993
#
# Author:	Miquel van Smoorenburg, <miquels@drinkel.nl.mugnet.org>

# Hacked by:    Greg Galloway and Marc Ewing
#

# First set up a default search path.
export PATH="/sbin:/usr/sbin:/bin:/usr/bin:/usr/X11R6/bin"

# Get a sane screen width
[ -z "$COLUMNS" ] && COLUMNS=80

# Read in our configuration
if [ -z "$BOOTUP" ]; then
  if [ -f /etc/sysconfig/init ]; then
      . /etc/sysconfig/init

  else
    # This all seem confusing? Look in /etc/sysconfig/init,
    # or in /usr/doc/initscripts-*/sysconfig.txt
    BOOTUP=color
    RES_COL=60
    MOVE_TO_COL="echo -en \\033[300C\\033[$[${COLUMNS}-${RES_COL}]D"
    SETCOLOR_SUCCESS="echo -en \\033[1;32m"
    SETCOLOR_FAILURE="echo -en \\033[1;31m"
    SETCOLOR_WARNING="echo -en \\033[1;33m"
    SETCOLOR_NORMAL="echo -en \\033[0;39m"

    LOGLEVEL=1
  fi
fi

if [ "$BOOTUP" != "verbose" ]; then
   INITLOG_ARGS="-q"
else
   INITLOG_ARGS=
fi

# A function to start a program.

daemon() {
	# Test syntax.
	gotbase=
	case $1 in
	    '')    echo '$0: Usage: daemon [+/-nicelevel] {program}'
	           return 1;;
	    --check)
	           shift
		   base=$1
		   gotbase="yes"
		   shift
		   nicelevel=0
		   ;;
	          

	    -*|+*) nicelevel=$1
	           shift;;
	     *)    nicelevel=0;;
	esac

        # Save basename.
        [ -z $gotbase ] && base=basename $1

        # See if it's already running.
	pid= <a href="#pidofproc">pidofproc</a> $base
	[ -n "$pid" ] && ps h $pid >/dev/null 2>&1 && return

	# make sure it doesn't core dump anywhere; while this could mask
	# problems with the daemon, it also closes some security problems
	ulimit -c 0
	

	# Echo daemon
        [ "$BOOTUP" = "verbose" ] && echo -n " $base"

	# And start it up.
nice -n $nicelevel initlog $INITLOG_ARGS -c "$*" && success "$base startup" || failure "$base startup"
}

# A function to stop a program.
killproc() {
	# Test syntax.
	if [ $# = 0 ]; then
		echo "Usage: killproc {program} [signal]"
		return 1
	fi

	notset=0
	# check for second arg to be kill level
	if [ "$2" != "" ] ; then
		killlevel=$2
	else
		notset=1
		killlevel="-9"

	fi

        # Save basename.
        base=basename $1

        # Find pid.
        pid=<a href="#pidofproc">pidofproc</a> $base

        # Kill it.
        if [ "$pid" != "" ] ; then
                [ $BOOTUP = "verbose" ] && echo -n "$base "

		if [ "$notset" = "1" ] ; then
		       if ps h $pid>/dev/null 2>&1; then
			   # TERM first, then KILL if not dead
			   kill -TERM $pid
			   usleep 100000
			   if ps h $pid >/dev/null 2>&1 ; then
				sleep 1
				if ps h $pid >/dev/null 2>&1 ; then
				        sleep 3
					if ps h $pid >/dev/null 2>&1 ; then
					   kill -KILL $pid
					fi
				fi
			   fi
		        fi
   ps h $pid >/dev/null 2>&1 && failure "$base shutdown" || success "$base shutdown"

		# use specified level only
		else
		   if ps h $pid >/dev/null 2>&1; then
  kill $killlevel $pid && success "$base $killlevel" || failure "$base $killlevel"
		   fi
		fi
	else
	    failure "$base shutdown"

	fi

        # Remove pid file if any.
	if [ "$notset" = "1" ]; then
            rm -f /var/run/$base.pid
	fi
}

# A function to find the pid of a program.
pidofproc() {
	# Test syntax.
	if [ $# = 0 ] ; then
		echo "Usage: pidofproc {program}"

		return 1
	fi

	# First try "/var/run/*.pid" files
	if [ -f /var/run/$1.pid ] ; then
	        pid=head -1 /var/run/$1.pid
	        if [ "$pid" != "" ] ; then
	                echo $pid
	                return 0
	        fi
	fi

	# Next try "pidof"

	pid=pidof $1
	if [ "$pid" != "" ] ; then
	        echo $pid
	        return 0
	fi

	# Finally try to extract it from ps
	ps ax | awk 'BEGIN { prog=ARGV[1]; ARGC=1 } 
			   { if ((prog == $5) || (("(" prog ")") == $5) ||
			     (("[" prog "]") == $5) ||
			   ((prog ":") == $5)) { print $1 ; exit 0 } }' $1
}

status() {
	# Test syntax.
	if [ $# = 0 ] ; then
		echo "Usage: status {program}"
		return 1
	fi

	# First try "pidof"
	pid=pidof $1
	if [ "$pid" != "" ] ; then
	        echo "$1 (pid $pid) is running..."

	        return 0
        else
                pid=ps ax | awk 'BEGIN { prog=ARGV[1]; ARGC=1 } 
                           { if ((prog == $5) || (("(" prog ")") == $5) ||
                             (("[" prog "]") == $5) ||
                           ((prog ":") == $5)) { print $1 ; exit 0 } }' $1
                if [ "$pid" != "" ] ; then
                        echo "$1 (pid $pid) is running..."

                        return 0
                fi
	fi

	# Next try "/var/run/*.pid" files
	if [ -f /var/run/$1.pid ] ; then
	        pid=head -1 /var/run/$1.pid
	        if [ "$pid" != "" ] ; then
	                echo "$1 dead but pid file exists"
	                return 1
	        fi
	fi
	# See if /var/lock/subsys/$1 exists
	if [ -f /var/lock/subsys/$1 ]; then
		echo "$1 dead but subsys locked"

		return 2
	fi
	echo "$1 is stopped"
	return 3
}

echo_success() {
  [ "$BOOTUP" = "color" ] && $MOVE_TO_COL
  echo -n "[  "

  [ "$BOOTUP" = "color" ] && $SETCOLOR_SUCCESS
  echo -n "OK"
  [ "$BOOTUP" = "color" ] && $SETCOLOR_NORMAL
  echo -n "  ]"

  return 0
}

echo_failure() {
  [ "$BOOTUP" = "color" ] && $MOVE_TO_COL
  echo -n "["
  [ "$BOOTUP" = "color" ] && $SETCOLOR_FAILURE
  echo -n "FAILED"

  [ "$BOOTUP" = "color" ] && $SETCOLOR_NORMAL
  echo -n "]"
  return 1
}

echo_passed() {
  [ "$BOOTUP" = "color" ] && $MOVE_TO_COL
  echo -n "["

  [ "$BOOTUP" = "color" ] && $SETCOLOR_WARNING
  echo -n "PASSED"
  [ "$BOOTUP" = "color" ] && $SETCOLOR_NORMAL
  echo -n "]"

  return 1
}

# Log that something succeeded
success() {
  if [ -z "$IN_INITLOG" ]; then
     initlog -n $0 -s "$1" -e 1
  else
     echo "-n $0 -s \"$1\" -e 1" >&21
  fi
  [ "$BOOTUP" != "verbose" ] && echo_success

  return 0
}

# Log that something failed
failure() {
  rc=$?
  if [ -z "$IN_INITLOG" ]; then
     initlog -n $0 -s "$1" -e 2
  else
     echo "-n $0 -s \"$1\" -e 2" >&21
  fi
  [ "$BOOTUP" != "verbose" ] && echo_failure

  return $rc
}

# Log that something passed, but may have had errors. Useful for fsck
passed() {
  rc=$?
  if [ -z "$IN_INITLOG" ]; then
     initlog -n $0 -s "$1" -e 1
  else
     echo "-n $0 -s \"$1\" -e 1" >&21
  fi
  [ "$BOOTUP" != "verbose" ] && echo_passed

  return $rc
}  

# Run some action. Log its output.
action() {
  STRING=$1
  echo -n "$STRING "
  shift
  initlog $INITLOG_ARGS -c "$*" && success "$STRING" || failure "$STRING"

  rc=$?
  echo
  return $rc
}

# Confirm whether we really want to run this service
confirm() {
  echo -n "Start service $1 (Y)es/(N)o/(C)ontinue? [Y] "
  read answer
  case $answer in
    y|Y|"")
      return 0
    ;;
    c|C)
      return 2
    ;;
    n|N)
      return 1
    ;;
    *)
      confirm $1
      return $?
    ;;
    esac
}