#!/bin/sh
#
#   'lsa3'   -   count files by extension
#
# Rev 00  04/29/96  Initial edition
# Rev 01  11/24/03  Better handling of filenames with embedded spaces.
#
########################################################

OK=0
if [ $# -eq 0 ] ; then
  OK=1
elif [ $# -eq 1 ] ; then
  if [ -d $1 ] ; then
    OK=1
    cd $1
  fi
fi
if [ $OK != 1 ] ; then
  echo "Count files in a given directory by extension."
  echo 
  echo "   lsa3 [directory]" 
  echo
  exit 1
fi
ls -a | awk '\
$0 != "." && $0 != ".." {\
  n=length($0);
  m=0;
  for (i=1;i<=n;i++) { if (substr($0,i,1) == ".") m=i };
  if (m==0) printf "! %s\n", $0;
    else if (m == 1) printf "%s !\n" ,$0;
      else printf("%s %s\n",substr($0,m,n-m+1),substr($0,1,m-1));
} ' | sort | awk '\
BEGIN {
  n=0;
  m=0;
  ext="";
};
{
  if ($1 == ext) n++
    else {
      m+=n;
      if (ext == "!") ext="(none)";
      if (n > 0) printf("%5d  %s\n",n,ext);
      ext=$1;
      n=1;
    }
};
END {
  if (n > 0) {
    m+=n;
    if (ext == "!") ext="(none)";
    printf("%5d  %s\n",n,ext);
  };
  printf("-----  -----------\n");
  printf("%5d  total files\n",m);
} '