#!/bin/sh
#	$NetBSD: checkver,v 1.18 2021/12/05 08:09:30 msaitoh Exp $
#
# Copyright (c) 1998 The NetBSD Foundation, Inc.
# All rights reserved.
#
# This code is derived from software contributed to The NetBSD Foundation
# by Eric Haszlakiewicz.
#
# 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.
#

#--------------------------------------------------------------------#
# checkver - 
#	Check for libraries that appear to be newer than the
#	one we're about to install.
#
# checkver [-q] [-v shlib_version_file] -d [installedlibdir [library name]]"
# checkver [-q] [-v shlib_version_file] -s [setlistdir [library name]]"
# checkver [-q] [-v shlib_version_file] -f liblistfile [library name]"
#
# One of -d, -s or -f must be specified.
#
# all: If library name is not specified it is assumed to
#	be the name of the current directory.
#
# -d: Checks the version against the installed libraries.
#	If no further arguments are given "/usr/lib" is
#	used as the location of installed libraries.
#
# -s: Checks the version against the sets.  If no argument
#	follows the sets directory defaults to "/usr/src/distrib/sets/lists".
#	The directory may be specified as either the top of the
#	source tree or as the lists directory.
#
# -f: Checks the version against the provided list.  A filename
#	must be supplied.
#
# -v: Specify the filename of the shlib_version file.  Defaults
#     to "./shlib_version".
#
# This script produces no output if all library version are not
# large than the source version.  If an installed library with a
# version greater than the source is found, checkver prints a
# header and a list of the names of the offending installed libraries.
#
# The header may be suppressed by passing "-q" as the first argument.
#

TMP=/tmp/checkver.$$
PROG="$(basename "$0")"
# Can't trap 11 (SEGV) in the Real Bourne Shell, since it uses it for
# internal malloc!
trap "exit 2" 1 2 3 4 5 6 7 8 10 12 13 14 15
trap "[ -d $TMP ] && rm -rf $TMP" 0

Usage() {
cat << EOF 1>&2
Usage: $PROG [-q] [-v version_file] -d [installedlibdir [library name]]
       $PROG [-q] [-v version_file] -s [setlistdir [library name]]
       $PROG [-q] [-v version_file] -f liblistfile [library name]
       $PROG is a script that looks for installed libraries with
       versions greater than that in the version file.
       For more information, read the comments.
EOF
	exit 1
}

basedir=/usr/src
setsdir=$basedir/distrib/sets/lists
libdir=/usr/lib
shlib_version=./shlib_version

error=0
quiet=0
usedir=0
usefile=0
usesets=0
CWD=$(pwd)
: ${AWK:=awk}

fixone() {
	eval $(${AWK} -v 'LIB=$1' '
BEGIN {
	gsub(".*\.so\.", "", LIB);
	split(LIB, VER, ".");
	printf("local instmajor=%d\n", V[1] + 0);
	printf("local instminor=%d\n", V[2] + 0);
	printf("local instteeny=%d\n", V[3] + 0);
}')
	local ms="The following libraries have versions greater than the source"

	# If they're greater than the source, complain.
	if [ "0$major" -eq "0$instmajor" ]; then
		if [ "0$minor" -eq "0$instminor" ]; then
			if [ "0$teeny" -lt "0$instteeny" ]; then
				if [ $error -eq 0 -a $quiet -eq 0 ]; then
					echo "$ms" 1>&2
				fi
				echo $1 1>&2
				error=1
			fi
		elif [ "0$minor" -lt "0$instminor" ]; then
			if [ $error -eq 0 -a $quiet -eq 0 ]; then
				echo "$ms" 1>&2
			fi
			echo $1 1>&2
			error=1
		fi
	elif [ "0$major" -lt "0$instmajor" ]; then
		if [ $error -eq 0 -a $quiet -eq 0 ]; then
			echo "$ms" 1>&2
		fi
		echo $1 1>&2
		error=1
	fi
}

while getopts df:shqv: f; do
	case $f in
	d)	usedir=1 
		if [ $usefile -eq 1 -o $usesets -eq 1 ]; then
			Usage
		fi;;
	f)	usefile=1; arg1=$OPTARG
		if [ $usedir -eq 1 -o $usesets -eq 1 ]; then
			Usage 
		fi;;
	s)	usesets=1 
		if [ $usedir -eq 1 -o $usefile -eq 1 ]; then
			Usage
		fi;;
	v)	shlib_version=$OPTARG;;
	q)	quiet=1;;
	*)	Usage;;
	esac
done

shift $(($OPTIND - 1))

if [ $usedir -eq 0 -a $usefile -eq 0 -a $usesets -eq 0 ]; then
	Usage
fi

if [ $usefile -eq 1 ]; then
	LIBLIST="$arg1"
else
	if ! mkdir -m 0700 $TMP; then
		echo "$PROG: Unable to create temp directory." 1>&2
		exit 2
	fi
	LIBLIST=$TMP/libs.lst
fi

# Build list from the installed libraries.
if [ $usedir -eq 1 ]; then
	if [ -n "$1" ]; then
		libdir="$1"
	fi
	for f in $libdir; do
		ls $f/lib*.so.*.*
	done > $LIBLIST 2> /dev/null
fi

# Build list from set lists.  Parameter may be either
# the "lists" directory or the top of the source tree.
if [ $usesets -eq 1 ]; then
	if [ -n "$1" ]; then
		setsdir="$1"
		if [ -d "$setsdir/distrib/sets/lists" ]; then
			setsdir="$setsdir/distrib/sets/lists"
		fi
	fi
	(cd $setsdir;
	 cat */[a-z]* |
	 grep '^./usr/lib/lib.*\.so\.[0-9][0-9]*\.[0-9][0-9]*' |
	 sort -u > $LIBLIST)
fi

#
# The file $LIBLIST now contains a list of libraries.
#
if [ -z "$2" ]; then
	makefile=$CWD/Makefile
	libname=$(grep '^LIB=' $makefile | sed -e 's/^LIB=[[:space:]]*//')

	# Assume the library name is the name of the current directory.
	if [ -z "$libname" ]; then
		libname=$(basename $CWD)
	fi
else
	    libname="$2"
fi
echo $libname | grep "^lib" 1>&2 2> /dev/null
if [ $? != 0 ]; then
	libname="lib$libname"
fi


if [ ! -f $shlib_version ]; then
	echo "$PROG: unable to find $shlib_version" 1>&2
	exit 2
fi

# Grab major and minor numbers from the source.
. $shlib_version

if [ -z "$minor" -o -z "$major" ]; then
	echo "$PROG: $shlib_version doesn't contain the version." 1>&2
	exit 2
fi

# Find every shared object library with the same base name.
for instlib in $(grep $libname.so "$LIBLIST"); do
	# Grab the major and minor from the installed library.
	fixone "$instlib"
done

exit $error