#!/bin/bash - 
#===============================================================================
#
#          FILE:  zerobytefile-chk.sh
# 
#         USAGE:  ./zerobytefile-chk.sh 
# 
#   DESCRIPTION:  Finds zero byte files in system folders and lists them
#                 Will also ask to attempt to reinstall package
# 
#       OPTIONS:  ---
#  REQUIREMENTS:  ---
#          BUGS:  ---
#         NOTES:  ---
#        AUTHOR: Roger Zauner (rdz), 
#       COMPANY: 
#       CREATED: 01/12/2011 11:49:15 AM AKST
#      REVISION:  ---
#===============================================================================

set -o nounset                              # Treat unset variables as an error
#set -o xtrace                              # Enable trace debugging


# Find only zero byte files, omitting /usr/src/ files
sudo find /usr -not -path "*/usr/src/*" -size 0 > /tmp/zero-byte-file.log

sudo chmod a+r /tmp/zero-byte-file.log

# read in this listing and find each file's package owner
{
    while read FILENAME; do
        qfile ${FILENAME}
    done
} < /tmp/zero-byte-file.log > /tmp/package.log


# Only want package name field (omit filenames causing package name to be duplicated)
cut --delimiter=" " --fields=1 < /tmp/package.log > /tmp/package.log.1

# get rid redundant package names
# TODO: this isn't working for some reason, debug!
uniq --unique < /tmp/package.log.1 > /tmp/package.log.2

# sort
sort < /tmp/package.log.2 > /tmp/package.log.3


# ask to reinstall packages?
printf "These are the packages I will reinstall:\n"
cat /tmp/package.log.3

printf "Do you wish to reinstall these packages?\n"
printf "(This requires root privilages.)\n"
select yn in "Yes" "No"; do
    case $yn in
        Yes ) continue;;
        No ) exit;;
    esac
done


# reinstall packages as previously requested
for pkg_name in `< /tmp/package.log.3`; do
    sudo emerge $pkg_name
done