#!/bin/bash
# Last edited on 2003-09-10 20:49:13 by stolfi

cmd="${0##*/}"
usage="${cmd} DIR"

# Writes the standard input to a file named "${DIR}/${FILENO}" where
# the environment variable {FILENO} must be set by the caller.
# Meant to be used as the "-s" argument of formail.

if [ $# -ne 1 ]; then 
  echo "usage: ${usage}" 1>&2; exit 1
fi

dir="$1"; shift;
if [ ! -d ${dir} ]; then
  echo "${dir} not found or not a directory" 1>&2; exit 1
fi

name="${dir}/${FILENO}"
seq=0
while [ -r ${name}-${seq} ]; do 
  seq=$((seq + 1))
done

echo "-> ${name}-${seq}" 1>&2

cat > "${name}-${seq}"