#!/bin/sh
#
# rpm-V_all
#
# AUTHOR:
#   Dan Harkless                                                    <opensource@
#   http://harkless.org/dan/software/                              harkless.org>
#
# COPYRIGHT:
#   This file is Copyright (C) 2019 by Dan Harkless, and is released under the
#   GNU General Public License <http://www.gnu.org/copyleft/gpl.html>.
#
# DESCRIPTION:
#   Runs 'rpm -V' on all packages installed on the system, prompting the user
#   for their desired action when any differences are found.  Particularly 
#   useful if some system files have been accidentally deleted or modified since
#   the last backup.  
#
#   Each package name being verified will be printed on a new line (in
#   alphabetical order), and if rpm -V doesn't find any differences, the script
#   will move on to the next one.
#
#   If differences are found, the user will be prompted to type i, r, R, u, or
#   V, followed by <Enter>, or simply <Enter> by itself.  To expand on the 
#   capsule descriptions in the prompt, the choices have the following effects. 
#   Except as stated, the user is prompted again for the next action after the 
#   chosen one is completed.
#
#   i:  Info.  Run 'rpm -qi' on the package.
#
#   r:  Reinstall + Verify.  Run 'yum reinstall' on the package (to replace
#       missing or damaged files), then reverify with 'rpm -V'.  If there are
#       no longer any differences, the script moves on to the next RPM.
#
#   R:  Same as 'r', but 'yum reinstall -y' is run so that it's not necessary
#       to enter 'y' at rpm's prompt to proceed with the reinstall.
#
#   u:  Uninstall.  'yum remove' the package.
#
#   v:  Verify.  'rpm -V' the package.  This is useful if rather than 
#       reinstalling, manual changes have been made outside the script to bring
#       the package back into line.  As with r/R, if differences are no longer
#       found, the script will move on to the next package.
#
#   <Enter>:  Ignores any differences in the current package (e.g. because edits
#             have been made to config files since the package was installed,
#             or because some file attributes change while the package is in
#             a running state), and moves on to the next package.
#
#   The user can also hit Ctrl-C at the prompt to stop execution of the script.
#
# DATE        MODIFICATION
# ==========  ==================================================================
# 2019-01-24  Original.

for p in `rpm -qa | sort`; do
    echo $p
    rpm -V $p
    stay_on_target=$?
    if [ $stay_on_target -ne 0 ]; then
	echo; echo "WARNING: Differences found in $p."
    fi

    while [ $stay_on_target -ne 0 ]; do
	echo -n "[i: Info. r/R: Reinstall+Verify / -y. u: Uninstall."\
	    "v: Verify. <Enter>: Skip.] "
	read input
 
	if [ x"$input" = x"i" ]; then
	    rpm -qi $p
	elif [ x"$input" = x"r" ]; then
	    yum reinstall $p
	    rpm -V $p
	    stay_on_target=$?
	elif [ x"$input" = x"R" ]; then
	    yum reinstall -y $p
	    rpm -V $p
	    stay_on_target=$?
	elif [ x"$input" = x"u" ]; then
	    yum remove $p
	    stay_on_target=$?
	elif [ x"$input" = x"v" ]; then
	    rpm -V $p
	    stay_on_target=$?
	elif [ x"$input" = x ]; then
	    stay_on_target=0
	else
	    echo "ERROR: Unknown option '$input'."
	fi

	echo
    done
done