#!/bin/sh

# fix: replaces arg1 with arg2 in files.  It also maintains the owner/group.
#
#  EXAMPLE     fix "joe " "fred " *.txt
#
#  changes every occurance of the string "joe " to "fred " in files ending
#  with ".txt" in the current directory.

OLD="$1"
NEW="$2"
shift;shift

for F in `grep -l -i $OLD $*`
do
     sed -e "s*$OLD*$NEW*g" $F > /tmp/$F.$$
     owner=`ls -l $F | awk '{ print $3 }'`
     group=`ls -l $F | awk '{ print $4 }'`
     mv /tmp/$F.$$ $F
     chown $owner:$group $F
done