UNIX for Dummies Questions & Answers

 
# Program designed to copy files to a
# collection folder.

dir=$1
# output the errors to another dimension!!
ls "$dir" > /dev/null 2> /dev/null
 
# check to see if there is one command line argument
if [ $# -eq 1 ]
then    # check to see if file exists
   if [ ! -f $1 ]
   then
      echo "This file does not exist."
      exit 2
   else      # check to see if directory exists
      if [ ! -d $HOME/collection ]
      then
         mkdir collection
         cp "$dir" collection
      else
      # mkdir collection
         cp "$dir" collection
      fi
   fi
else    
   # output errors to another dimension!!
   ls "$dir" > /dev/null 2> /dev/null
   # error message stating that a command line argument is needed
   echo "error!! I need a filename"
   exit 1
fi