#!/bin/sh

case $# in
  0 ) dir=.    ;;
  * ) dir="$@" ;;
esac

find $dir \
  -type f \
  \(  -name '*.log' \
      -o -name '*.aux' \
      -o -name '*.dvi' \
      -o -name '*.fls' \
  \) \
  -print0 \
  | xargs -0 rm -f