example3-2.sh

#/bin/bash
# KarlLv@126.com
# 14 March, 2016
# rpm-check.sh
# Advanced Bash-Scripti Guide

# Queries an rpm file for description, listing, and whether it can be installed.
# Saves output to a file
# This scipt illustrates using a code block.

SUCCESS=0
E_NOARGS=65

if [ -z "$1" ]
then
    echo "Usage: `basename $0` rpm-file"
    exit $E_NOARGS
fi

{

#Begin code block
echo
echo "Archive Description:"
rpm -qpi $1                     # Query description
echo
echo "Archive Listing:"
rpm -qpl $1                     # Query listing.

echo
rpm -i --test $1                # Query whether rpm file can be installed

echo $SUCCESS
if [ "$?" -eq $SUCCESS ]
then
    echo "$1 can be installed."
else
    echo "$1 cannot be installed."
fi
echo
} > "1.test"

echo "Results of rpm test in file $1.test"

# See rpm man page for explanation of options.

exit 0
}