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/usr/share/openvswitch/scripts/ovs-lib is in openvswitch-switch 2.0.1+git20140120-0ubuntu2.

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# This is a shell function library sourced by some Open vSwitch scripts.
# It is not intended to be invoked on its own.

# Copyright (C) 2009, 2010, 2011, 2012 Nicira, Inc.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at:
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

## ----------------- ##
## configure options ##
## ----------------- ##

# All of these should be substituted by the Makefile at build time.
logdir=${OVS_LOGDIR-'/var/log/openvswitch'}                 # /var/log/openvswitch
rundir=${OVS_RUNDIR-'/var/run/openvswitch'}                 # /var/run/openvswitch
sysconfdir=${OVS_SYSCONFDIR-'/etc'}     # /etc
etcdir=$sysconfdir/openvswitch                  # /etc/openvswitch
datadir=${OVS_PKGDATADIR-'/usr/share/openvswitch'}        # /usr/share/openvswitch
bindir=${OVS_BINDIR-'/usr/bin'}                 # /usr/bin
sbindir=${OVS_SBINDIR-'/usr/sbin'}              # /usr/sbin

# /etc/openvswitch or /var/lib/openvswitch
if test X"$OVS_DBDIR" != X; then
    dbdir=$OVS_DBDIR
elif test X"$OVS_SYSCONFDIR" != X; then
    dbdir=$OVS_SYSCONFDIR/openvswitch
else
    dbdir='/etc/openvswitch'
fi

ovs_ctl_log () {
    echo "$@" >> "${logdir}/ovs-ctl.log"
}

ovs_ctl () {
    case "$@" in
        *"=strace"*)
            # In case of running the daemon with strace, piping the o/p causes
            # the script to block (strace probably does not close the inherited
            # pipe). So, do not log the o/p to ovs-ctl.log.
            "${datadir}/scripts/ovs-ctl" "$@"
        ;;
        "status")
            # In case of the command 'status', we should return the exit status
            # of ovs-ctl. It is also useful to document the o/p in ovs-ctl.log.
            display=`"${datadir}/scripts/ovs-ctl" "$@" 2>&1`
            rc=$?
            echo "${display}" | tee -a "${logdir}/ovs-ctl.log"
            return ${rc}
        ;;
        *)
            echo "`date -u`:$@" >> "${logdir}/ovs-ctl.log"
            "${datadir}/scripts/ovs-ctl" "$@" 2>&1 | tee -a "${logdir}/ovs-ctl.log"
        ;;
    esac
}

VERSION='2.0.1'

DAEMON_CWD=/

LC_ALL=C; export LC_ALL

## ------------- ##
## LSB functions ##
## ------------- ##

# Use the system's own implementations if it has any.
if test -e /etc/init.d/functions; then
    . /etc/init.d/functions
elif test -e /etc/rc.d/init.d/functions; then
    . /etc/rc.d/init.d/functions
elif test -e /lib/lsb/init-functions; then
    . /lib/lsb/init-functions
fi

# Implement missing functions (e.g. OpenSUSE lacks 'action').
if type log_success_msg >/dev/null 2>&1; then :; else
    log_success_msg () {
        printf '%s.\n' "$*"
    }
fi
if type log_failure_msg >/dev/null 2>&1; then :; else
    log_failure_msg () {
        printf '%s ... failed!\n' "$*"
    }
fi
if type log_warning_msg >/dev/null 2>&1; then :; else
    log_warning_msg () {
        printf '%s ... (warning).\n' "$*"
    }
fi
if type action >/dev/null 2>&1; then :; else
    action () {
       STRING=$1
       shift
       "$@"
       rc=$?
       if test $rc = 0; then
            log_success_msg "$STRING"
       else
            log_failure_msg "$STRING"
       fi
       return $rc
    }
fi

## ------- ##
## Daemons ##
## ------- ##

pid_exists () {
    # This is better than "kill -0" because it doesn't require permission to
    # send a signal (so daemon_status in particular works as non-root).
    test -d /proc/"$1"
}

start_daemon () {
    priority=$1
    wrapper=$2
    shift; shift
    daemon=$1
    strace=""

    # drop core files in a sensible place
    test -d "$DAEMON_CWD" || install -d -m 755 -o root -g root "$DAEMON_CWD"
    set "$@" --no-chdir
    cd "$DAEMON_CWD"

    # log file
    test -d "$logdir" || install -d -m 755 -o root -g root "$logdir"
    set "$@" --log-file="$logdir/$daemon.log"

    # pidfile and monitoring
    test -d "$rundir" || install -d -m 755 -o root -g root "$rundir"
    set "$@" --pidfile="$rundir/$daemon.pid"
    set "$@" --detach --monitor

    # wrapper
    case $wrapper in
        valgrind)
            if (valgrind --version) > /dev/null 2>&1; then
                set valgrind -q --leak-check=full --time-stamp=yes \
                    --log-file="$logdir/$daemon.valgrind.log.%p" "$@"
            else
                log_failure_msg "valgrind not installed, running $daemon without it"
            fi
            ;;
        strace)
            if (strace -V) > /dev/null 2>&1; then
                strace="strace -tt -T -s 256 -ff"
                if (strace -DV) > /dev/null 2>&1; then
                    # Has the -D option.
                    set $strace -D -o "$logdir/$daemon.strace.log" "$@"
                    strace=""
                fi
            else
                log_failure_msg "strace not installed, running $daemon without it"
            fi
            ;;
        glibc)
            set env MALLOC_CHECK_=2 MALLOC_PERTURB_=165 "$@"
            ;;
        '')
            ;;
        *)
            log_failure_msg "unknown wrapper $wrapper, running $daemon without it"
            ;;
    esac

    # priority
    if test X"$priority" != X; then
        set nice -n "$priority" "$@"
    fi

    action "Starting $daemon" "$@"

    if test X"$strace" != X; then
        # Strace doesn't have the -D option so we attach after the fact.
        setsid $strace -o "$logdir/$daemon.strace.log" \
            -p `cat $rundir/$daemon.pid` > /dev/null 2>&1 &
    fi
}

stop_daemon () {
    if test -e "$rundir/$1.pid"; then
        if pid=`cat "$rundir/$1.pid"`; then
            for action in TERM .1 .25 .65 1 1 1 1 KILL 1 1 1 2 10 15 30 FAIL; do
                if pid_exists "$pid" >/dev/null 2>&1; then :; else
                    return 0
                fi
                case $action in
                    TERM)
                        action "Killing $1 ($pid)" kill $pid
                        ;;
                    KILL)
                        action "Killing $1 ($pid) with SIGKILL" kill -9 $pid
                        ;;
                    FAIL)
                        log_failure_msg "Killing $1 ($pid) failed"
                        return 1
                        ;;
                    *)
                        sleep $action
                        ;;
                esac
            done
        fi
    fi
    log_success_msg "$1 is not running"
}

daemon_status () {
    pidfile=$rundir/$1.pid
    if test -e "$pidfile"; then
        if pid=`cat "$pidfile"`; then
            if pid_exists "$pid"; then
                echo "$1 is running with pid $pid"
                return 0
            else
                echo "Pidfile for $1 ($pidfile) is stale"
            fi
        else
            echo "Pidfile for $1 ($pidfile) exists but cannot be read"
        fi
    else
        echo "$1 is not running"
    fi
    return 1
}

daemon_is_running () {
    pidfile=$rundir/$1.pid
    test -e "$pidfile" && pid=`cat "$pidfile"` && pid_exists "$pid"
} >/dev/null 2>&1