functions.in

Network Administration Visualized 网络管理可视化源码

#!/usr/bin/env bash
#
# $Id: functions.in 3787 2007-01-03 15:44:47Z mortenv $
# This file contains functions to be used by most or all shell scripts
# in the NAV init.d directory.
#
#
# Copyright 2002-2004 Norwegian University of Science and Technology
#
# This file is part of Network Administration Visualized (NAV)
#
# NAV is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# NAV is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with NAV; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
#
#
# Authors: Morten Vold <[e-mail]>
# Credits: Miquel van Smoorenburg <[e-mail]>
#
prefix=@prefix@
exec_prefix=@exec_prefix@
sysconfdir=@sysconfdir@
initdir=@initdir@
bindir=@bindir@
localstatedir=@localstatedir@

daemon() {
    $1
    rc=$?
    if [ $rc -eq 0 ]; then
        echo -n "Ok"
        return 0
    else
        echo -n "Failed"
        return 1
    fi
}

killproc() {
    pid=`pidofproc $1`
    if [ -z "$pid" ] ; then
        return 1
    fi
    if checkpid $pid 2>&1; then
        if kill $pid; then
            echo -n "Ok"
            return 0
        else
            echo -n "Unable to terminate the process ($pid)"
            return 1
        fi
    else
        echo -n "$1 is not running"
        return 0
    fi
}

status() {
    local base=${1##*/}
    local pid=`pidofproc $1`
    if [ "$pid" != "" ] ; then
        echo "$1 (pid $pid) is running...";
        return 0
    else
        echo "$1 does not seem to be running...";
        return 1
    fi
}

# Check if $pid (could be plural) are running
checkpid() {
        while [ "$1" ]; do
           ps -p "$1" >/dev/null 2>&1 && return 0
           shift
        done
        return 1
}

pidofproc() {
    local base=${1##*/}
    local PIDOF=/sbin/pidof
    local piddir="${localstatedir}/run"
    # Attempt removing any extensions from the base and check for two
    # pid files (so if base is pping.py, we check both pping.py.pid
    # and pping.pid)
    local pidfiles="${piddir}/${base}.pid ${piddir}/${base/.*/}.pid"

    if [ ! -z "$DEBUG" ]; then echo Checking ${pidfiles}; fi
    for pidfile in $pidfiles; do
        if [ -f $pidfile ] ; then
            local line p pid=
            read line < $pidfile
            for p in $line ; do
                test -z "${p//[0-9]/}" && checkpid "$p" && pid="$pid $p"
            done
            if [ -n "${pid-:}" ] ; then
                echo $pid
                return 0
            fi
        elif [ ! -z "$DEBUG" ]; then
            echo Could not find pidfile ${pidfile}
        fi
    done

    # If no pid files were found, our last resort is to try the pidof
    # command (if it exists)
    if [ -x $PIDOF ]; then
        $PIDOF -o $$ -o $PPID -o %PPID -x $1 || \
        $PIDOF -o $$ -o $PPID -o %PPID -x ${base}
    fi
}