Some old bash functions for doing parallel ssh and scp, pushing and fetching files through jump hosts and deep escaping

moving_files_around.sh

function multiscp {
  hostlist=$1
  filename=$2
  tempfiletemplate="/tmp/`basename $0`-XXXXXX"
  pidlistfile="`mktemp $tempfiletemplate`"
  exitstatus=0
  for host in $hostlist; do
    scp $filename $host: &
    echo "$!" >>$pidlistfile
  done
  for pid in `cat $pidlistfile`; do
    if ! wait $pid; then
      let exitstatus++
    fi
  done
  rm $pidlistfile
  return $exitstatus
}

function multissh {
  hostlist=$1
  remotecommand=$2
  tempfiletemplate="/tmp/`basename $0`-XXXXXX"
  pidlistfile="`mktemp $tempfiletemplate`"
  exitstatus=0
  for host in $hostlist; do
    bash -c "ssh $host \"$remotecommand\" 2>&1 | sed -e \"s/^/$host: /\"
      test ${PIPESTATUS[0]} -eq 0 ||
      (echo \"Encountered an error running command on to $host\" && false)" &
    echo "$!" >>$pidlistfile
  done
  for pid in `cat $pidlistfile`; do
    if ! wait $pid; then
      let exitstatus++
    fi
  done
  rm $pidlistfile
  return $exitstatus
}

function push {
  remotehost=$1
  localfile=$2
  adm=$3
  jump=$4

  if ssh -o ConnectTimeout=1 $remotehost 'true' >/dev/null; then
    cat < $localfile | ssh $remotehost "
      cat > `basename $localfile`
    "
  elif ssh -o ConnectTimeout=1 $adm 'true' >/dev/null; then
    cat < $localfile | ssh -A $adm "
      ssh $remotehost \"
        cat > `basename $localfile`
      \"
    "
  else
    cat < $localfile | ssh -A $jump "
      ssh -A $adm \"
        ssh $remotehost \\\"
          cat > `basename $localfile`
        \\\"
      \"
    "
  fi
}

function fetch {
  path="$1"
  remotefile="$2"
  remotehost="$3"

  ssh $remotehost "
    cat \"$path/$remotefile\"
  " > "$remotefile"
  if [ ! -e "$remotefile" ]; then
    exit 1
  fi
}

escaping_example {
  ssh -A jump.example.com "
    ssh -A adm1.example.com \"
      xapply -P9 \\\"
        scp $rpmfilename %1: && 
        ssh %1 \\\\\\\"test -e $rpmfilename && 
          sudo /path/to/script.sh $rpmfilename
        \\\\\\\" 2>&1 | sed -e 's/^/%1: /'; test ${PIPESTATUS[0]} -eq 0 ||
        (echo \\\\\\\"Encountered an error installing to %1\\\\\\\" && false)
      \\\" $targets
    \"
  "  
}