deviceRebootCronscheduler.sh

#! /bin/sh

source /etc/log_timestamp.sh
source /usr/ccsp/tad/corrective_action.sh

CRONTAB_DIR="/var/spool/cron/crontabs/"
CRONTAB_FILE=$CRONTAB_DIR"root"
CRONFILE_BK="/tmp/cron_tab$$.txt"
LOG_FILE="$1"
REBOOT_SCRIPT="$2"
FW_START="/nvram/.FirmwareUpgradeStartTime"
FW_END="/nvram/.FirmwareUpgradeEndTime"

#Pending reboot flags
XPKI_CERT_UPDATE_REBOOT_SCHEDULED="/tmp/.XpkiCrtUpdtdWaitingReboot"
RFC_REBOOT_SCHEDULED="/tmp/.RfcwaitingReboot"
DOWNLOAD_INPROGRESS="/tmp/.downloadingfw"
REBOOT_WAIT="/tmp/.waitingreboot"

if [ -f /etc/device.properties ]
then
    source /etc/device.properties
fi

if [ -z $LOG_FILE ]
then
    echo_t "Error!!! log file not passed to deviceRebootCronscheduler.sh"
    exit 1
fi

if [ -z $REBOOT_SCRIPT ] || [ ! -f $REBOOT_SCRIPT ]
then
    echo_t "[deviceRebootCronscheduler.sh] Error!!! Reboot Script not set" >> $LOG_FILE
    exit 1
fi

calcRebootExecTime()
{

        # Extract maintenance window start and end time
        if [ -f "$FW_START" ] && [ -f "$FW_END" ]
        then
           start_time=`cat $FW_START`
           end_time=`cat $FW_END`
        else
           start_time=3600
           end_time=14400
        fi

        #if start_time and end_time are equal, set them to default
        if [ "$start_time" = "$end_time" ]
        then
                echo_t "[deviceRebootCronscheduler.sh] start_time and end_time are equal.so,setting them to default" >> $LOG_FILE
                start_time=3600
                end_time=14400
        fi

        #Get local time off set
        time_offset=`dmcli eRT getv Device.Time.TimeOffset | grep "value:" | cut -d ":" -f 3 | tr -d ' '`


        #Maintence start and end time in local
        if [ "x$BOX_TYPE" = "xHUB4" ]
        then
		main_start_time=$start_time
		main_end_time=$end_time
        else
		main_start_time=$((start_time-time_offset))
		main_end_time=$((end_time-time_offset))
        fi

        #calculate random time in sec
        rand_time_in_sec=`awk -v min=$main_start_time -v max=$main_end_time -v seed="$(date +%N)" 'BEGIN{srand(seed);print int(min+rand()*(max-min+1))}'`

        # To avoid cron to be set beyond 24 hr clock limit
        if [ $rand_time_in_sec -ge 86400 ]
        then
                rand_time_in_sec=$((rand_time_in_sec-86400))
                echo_t "[deviceRebootCronscheduler.sh] Random time in sec exceed 24 hr limit.setting it correct limit" >> $LOG_FILE

        fi

        #conversion of random generated time to HH:MM:SS format
                #calculate random second
                rand_time=$rand_time_in_sec
                rand_sec=$((rand_time%60))

                #calculate random minute
                rand_time=$((rand_time/60))
                rand_min=$((rand_time%60))

                #calculate random hour
                rand_time=$((rand_time/60))
                rand_hr=$((rand_time%60))

        echo_t "[deviceRebootCronscheduler.sh] start_time: $start_time, end_time: $end_time" >> $LOG_FILE
        echo_t "[deviceRebootCronscheduler.sh] time_offset: $time_offset" >> $LOG_FILE
        echo_t "[deviceRebootCronscheduler.sh] main_start_time: $main_start_time , main_end_time= $main_end_time" >> $LOG_FILE
        echo_t "[deviceRebootCronscheduler.sh] rand_time_in_sec: $rand_time_in_sec ,rand_hr: $rand_hr ,rand_min: $rand_min ,rand_sec: $rand_sec" >> $LOG_FILE

}

ScheduleCron()
{
        # Dump existing cron jobs to a file & add new job
        crontab -l -c $CRONTAB_DIR > $CRONFILE_BK
        echo "$rand_min $rand_hr * * * $REBOOT_SCRIPT" >> $CRONFILE_BK
        crontab $CRONFILE_BK -c $CRONTAB_DIR
        rm -rf $CRONFILE_BK
        touch $XPKI_CERT_UPDATE_REBOOT_SCHEDULED
}

if [ -f $XPKI_CERT_UPDATE_REBOOT_SCHEDULED ] || [ -f $RFC_REBOOT_SCHEDULED ] || [ -f $DOWNLOAD_INPROGRESS ] || [ -f $REBOOT_WAIT ]
then
        echo_t "[deviceRebootCronscheduler.sh] Abort!!!, reboot schedule in progress" >> $LOG_FILE
else
        #calculate and schedule cron job
        calcRebootExecTime
        if [ -f $CRONTAB_FILE ]
        then
                ScheduleCron
                echo_t "[deviceRebootCronscheduler.sh] Reboot cron job scheduled with $REBOOT_SCRIPT" >> $LOG_FILE 
        fi
fi