daemontools で service を起動できていなかったら、service を停止して symlink を消す

link_to_daemontools.sh

#!/bin/bash

#!/bin/bash

TARGET="${1}"
LINKNAME="${2}"
IS_DELETED=${3:-0}
SERVICE="$(basename $LINKNAME)"
declare -i SEC=0
declare -i COUNT=0

if ps -ef | grep -v grep | grep -v "${0}" | grep -qs "supervise ${SERVICE}$"; then
    echo "${SERVICE} is already running"
    exit 0
else
    if [ -d "${LINKNAME}" ]; then
        LINKNAME="${LINKNAME}/$(basename $TARGET)"
    fi

    if [ -L "${LINKNAME}" ]; then
        echo "ln: creating symbolic link '${LINKNAME}': Symbolic link exists"
        exit 0
    elif [ -f "${LINKNAME}" ]; then
        echo "ln: creating symbolic link '${LINKNAME}': File exists"
        exit 1
    fi

    ln -s "${TARGET}" "${LINKNAME}"
    while :; do
        STR_SEC=$(svstat $LINKNAME | grep seconds | cut -d ' ' -f 5)
        SEC="${STR_SEC}"
        sleep 1

        if [ $COUNT -gt 10 ]; then
            # fail
            declare -i PID=0
            declare -i __SEC=0
            READLINK=$(readlink -f $LINKNAME)
            for DIR in $(find -L $READLINK -type d | grep -v ${LINKNAME}$); do
                echo $(readlink -f $DIR) | grep -qs ^$READLINK || continue

                PID_SEC=$(svstat $DIR | cut -d ' ' -f 4,5 | sed -e 's/)//' | sed -e 's|[/:,]||g')
                PID=$(echo $PID_SEC | cut -d ' ' -f 1)
                __SEC=$(echo $PID_SEC | cut -d ' ' -f 2)

                [ $PID = 0 -a $__SEC = 0 ] && continue

                if [ $__SEC -lt 3 ]; then
                    svc -dx $DIR
                elif ps -ef | grep $PID | grep -qs multilog; then
                    svc -dx $DIR
                fi
            done
            svc -dx "${LINKNAME}"
            rm -f "${LINKNAME}"
            echo "${LINKNAME} does not start"
            exit 1
        elif [ $SEC -gt 3 ]; then
            # success
            [ $IS_DELETED != 0 ] && rm -f "${LINKNAME}"
            break
        else
            COUNT="${COUNT} + 1"
        fi
    done
fi