A shell script that recursively finds and replaces usernames inside files within a directory.

auth_find.sh

#!/bin/bash

workpath=/opt/auth_files/
outfile=/root/auth_find-$1

# friendly usage funtion, called if no argument is supplied
usage ()
{
cat<<EOF
Usage: auth_find [username] [new-username]

This script recursively searches subversion's /opt/auth_files/ directory for
the supplied username and returns a list of files that contain it. If a second
username is supplied all instances of the first will be replaced with the second.

Output is sent to both STDOUT and /root/auth_find-username.

EOF
exit 1
}

if [ $# == 1 ]; then    # do this block if one argument is given
    echo "Results:"
    for afile in $(tree -ifF --noreport $workpath | grep -v '/$'); do
        if [ -n "$(grep "^$1 " $afile)" ]; then
            echo "$afile" | tee -a $outfile
        fi
    done
else
    if [ $# == 2 ]; then    # do this block if two arguments are given
        echo "Now replacing occurrences of '$1' with '$2' in the following files:"
        for afile in $(tree -ifF --noreport $workpath | grep -v '/$'); do
            if [ -n "$(grep "^$1 " $afile)" ]; then
                echo "$afile" | tee -a $outfile-CHANGED
                perl -p -i -e "s|$1|$2|g" $afile
            fi
        done
    else    # show usage if incorrect number of arguments given
        usage
    fi
fi