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#!/bin/sh
# $NetBSD: checkoldver,v 1.3 2008/04/30 13:10:50 martin Exp $
#
# Copyright (c) 2002 The NetBSD Foundation, Inc.
# All rights reserved.
#
# This code is derived from software contributed to The NetBSD Foundation
# by Christos Zoulas.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
# 1. Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in the
# documentation and/or other materials provided with the distribution.
#
# THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
# ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
# TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
# PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
# BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
# POSSIBILITY OF SUCH DAMAGE.
#
# checkoldver [dir ...]
#
# Looks in the given directories for old shared libraries and lists them
# Useful for: 'checkoldver /usr/lib | xargs rm -f'

delete() {
obsol="$1.so"
if [ ! -z "$2" ]
then
obsol="$obsol.$2"
fi
if [ ! -z "$3" ]
then
obsol="$obsol.$3"
fi
if [ ! -z "$4" ]
then
obsol="$obsol.$4"
fi
echo $PWD/$obsol
}

comparelib() {
OIFS="$IFS"
IFS="$IFS."
set -- $1
IFS="$OIFS"
if [ "$3" = "[0-9]*" ]
then
return
fi

if [ -z "$libmajor" ]
then
libname="$1"
libmajor="$3"
libminor="$4"
libtiny="$5"
return
fi
if [ "$libmajor" -lt "$3" ]
then
delete "$libname" "$libmajor" "$libminor" "$libtiny"
libmajor="$3"
libminor="$4"
libtiny="$5"
return
elif [ "$3" -lt "$libmajor" ]
then
delete "$libname" "$3" "$4" "$5"
return
fi

if [ -z "$libminor" ]
then
return
fi
if [ "$libminor" -lt "$4" ]
then
delete "$libname" "$libmajor" "$libminor" "$libtiny"
libmajor="$3"
libminor="$4"
libtiny="$5"
return
elif [ "$4" -lt "$libminor" ]
then
delete "$libname" "$3" "$4" "$5"
return
fi

if [ -z "$libtiny" ]
then
return
fi
if [ "$libtiny" -lt "$5" ]
then
delete "$libname" "$libmajor" "$libminor" "$libtiny"
libmajor="$3"
libminor="$4"
libtiny="$5"
return
elif [ "$5" -lt "$libminor" ]
then
delete "$libname" "$3" "$4" "$5"
return
fi
}

processonedir() {
cd "$1"
for lib in lib*.so
do
lib="${lib#lib}"
lib="${lib%.so}"

libmajor=
libminor=
libtiny=
for link in lib$lib.so.[0-9]*.[0-9]*.[0-9]*
do
comparelib "$link"
done

libmajor=
libminor=
libtiny=
for link in lib$lib.so.[0-9]*.[0-9]*
do
comparelib "$link"
done

libmajor=
libminor=
libtiny=
for link in lib$lib.so.[0-9]*
do
comparelib "$link"
done
done
}

for i
do
processonedir "$i"
done
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