dsmcWrapperScript.sh

#!/bin/bash
# A silly wrapper script to halt University of Oxford file 
# transfers to the central Tivoli Storage Manager / HFS Backup / IBM Spectrum Protect 
# (take your pick, they're all the same) backup robot place. 
#
# Usage: sudo /path/to/script /path/to/backup/location 
# 
# Requires python3 accessible as python3, and the regex / os modules. 
# Tested on MacOS and Linux 
#
#
BYTES_SENT=0;
#MAX_SIZE_TO_SEND=150 #Bytes, for testing  
MAX_SIZE_TO_SEND=$[185*(2**30)] #185 GiB <base 2> is approximately 198.6 GB <base 10> -- don't know which one they use for accounting for size. 

args=("$@")
sudo rm -f /tmp/dsmc-script.PID

function outputParser() { 
    python3 <<'EOF'
import os, re
rex=re.compile(r"Normal File\-\-\>\s*?([,0-9]*,?)\s*?\/")
valueToParse=os.environ.get('line');
match=rex.match(valueToParse);
try:
    stringToReturn = str(match.group(1));
    stringToReturn =stringToReturn.replace(',','');
except AttributeError:
    stringToReturn = "";
#Check for failed transfers 
failedResults = re.findall(r"\*\* Unsuccessful \*\*", valueToParse); 
nFailedResults = len(failedResults); 
if (nFailedResults >0):
    stringToReturn = ""; 
print(stringToReturn);
EOF
} #I am sure that the above is a one-liner in sed or awk. I just don't know what the one line is. 

function trapCaught() { 
    printf "\nCaught signal -- sending SIGINT to "
    pid=$(cat /tmp/dsmc-script.PID); 
    sudo kill -SIGTERM $pid; 
    echo -n "pid $pid" 
    sudo rm -f /tmp/dsmc-script.PID; 
    sleep 5; 
    sudo kill -9 $pid; 
    sleep 0.1; 
    sudo kill -9 0;

    echo ", quitting."
}

trap trapCaught sigint
killCount=0 
startTime=$SECONDS

while read -r line; do  
    echo "$line"
    export line; 
    X=$(export line=$line; outputParser)
    if [[ ! -z "$X" ]]; then
        BYTES_SENT=$[$BYTES_SENT + $X]
        echo "Sent $X bytes, $BYTES_SENT in total"
    fi
    if (( BYTES_SENT > MAX_SIZE_TO_SEND )); then
        if (( killCount < 1)); then 
            echo "STOPPED BACKUP BECAUSE $BYTES_SENT is GREATER THAN THE PERMITTED MAXIMUM OF $MAX_SIZE_TO_SEND"; 
            killStartTime=$(( SECONDS - startTime ))
            pid=$(cat /tmp/dsmc-script.PID)
            echo "PID is $pid"
            echo $pid | sudo xargs kill 
        fi 
        
        killCount=$[$killCount + 1]; 
        timeKillNow=$(( SECONDS - killStartTime ))
        rm -f /tmp/dsmc-script.PID

        if (( killCount > 100 || timeKillNow > 30  )); then 
            echo "Taking too long to die; retrying" 
            echo $pid | sudo xargs kill -9;
            sleep 0.1; 
            sudo kill -9 0; 
        fi

    fi
done < <( sudo dsmc incr ${args[0]} &  echo $! > /tmp/dsmc-script.PID  )