sort files on remote host(s)

remote_sort.sh

#!/bin/bash
REMOTE_HOST=freelaptop
if [ -d sortedfiles ]
then
    rm -rf ./sortedfiles/*
else
    tempdir=$(mktemp -d sortedfiles)
fi

if [ -f ./res ]
then
    rm -rf res
fi


if [ -f ./sort_res ]
then
    rm -rf ./sort_res
fi


for i in $*
do
    (
    scp "$i" iyed@$REMOTE_HOST:"$i" &> /dev/null
    echo "$i,$REMOTE_HOST,$?" >> res
    ) &
done

wait

for l in $(cat res)
do
    file=$(echo $l | cut -d, -f1)
    host=$(echo $l | cut -d, -f2)
    result=$(echo $l | cut -d, -f3)
    if [ ! $result -eq 0 ]
    then
        echo "failed to copy $file on $host"
        exit 1
    fi
    #alright all the files have been copied to a remote host
    #we can start sorting each file of the remote host
done

for l in $(cat res)
do
    file=$(echo $l | cut -d, -f1)
    host=$(echo $l | cut -d, -f2)
    result=$(echo $l | cut -d, -f3)
    #ssh iyed@$host sort -n $file | cat > ./$tempdir/$file
    (
    ssh iyed@$host sort -n $file | cat > ./sortedfiles/$file
    echo "$?,$file,$host" >> sort_res
    )&
done

wait

for l in $(cat sort_res)
do
    file=$(echo $l | cut -d, -f2)
    host=$(echo $l | cut -d, -f3)
    result=$(echo $l | cut -d, -f1)
    if [ ! $result -eq 0 ]
    then
        echo "failed to sort $file on $host"
        exit 1
    fi
done

sort -n -m sortedfiles/* | grep -e '^$' -v

rm -rf ./res ./sort_res sortedfiles