fs/skeleton/bin/run-isostream

#!/bin/selfclean sh

if [ "$#" -lt 1 ]; then
  echo "Usage: $0 <remoteip | --use-storage-box> <isostream options...>" >&2
  echo '   $ISOSTREAM_DISABLE_IF_PORT: if set, stops automatically if the' >&2
  echo "       given port is in use." >&2
  exit 99
fi


xport_is_open() {
  [ -n "$ISOSTREAM_DISABLE_IF_PORT" ] &&
  [ "$ISOSTREAM_DISABLE_IF_PORT" != "0" ] &&
  netstat -an | grep -q ":$ISOSTREAM_DISABLE_IF_PORT .*ESTABLISHED"
}


(
  (
    remote=$1
    shift

    if [ "$remote" = "--use-storage-box" ]; then
      remote=
      STORAGE_BOX_NAME=gfiberstorage.local

      echo "$0: use-storage-box: trying to find server: $STORAGE_BOX_NAME" >&2
      while [ -z "$remote" ]; do
        out=$(avahi-resolve -6n "$STORAGE_BOX_NAME")
        if [ "$?" -ne "0" ]; then
          sleep 1
        elif [ -z "$out" ]; then
          sleep 1
        else
          remote=$(echo "$out" | head -n 1 | cut -f 2)
        fi
      done
      echo "$0: use-storage-box: found a server: $remote" >&2
    fi

    pid=
    while :; do
      if xport_is_open; then
        if [ -n "$pid" ]; then
          echo "pausing test because port $ISOSTREAM_DISABLE_IF_PORT open" >&2
          kill -15 "$pid"
          pid=
        fi
      else
        if [ -z "$pid" ]; then
          echo "Starting: isostream $* '$remote'" >&2
          isostream "$@" "$remote" &
          pid=$!
        fi
      fi
      sleep 1
    done
  ) 2>&1  | tee /proc/self/fd/5 | logos isostream  # Send output to isostream, and also fd #5 so it ends up back on stdout
) 5>&1  # make fd #5 a copy of the original stdout