makeshlib

被广泛使用的域名服务(DNS)软件

#! /bin/sh
:
#
# makeshlib - installs libresolv_pic.a into SunOS 4.x or *BSD libc.so
#
#ident	   "@(#)bind/shres/netbsd:$Name: rel-821 $:$Id: makeshlib,v 8.3 1995/12/29 07:16:23 vixie Exp $"
#
# by Chris Davis <[e-mail]>
# based on code by Piete Brooks <[e-mail]>
#              and Dave Morrison <[e-mail]>
# with additions by Greg A. Woods <[e-mail]>
# NetBSD support added by Matt Ragan <[e-mail]>
# code cleanup and more error checking by Greg A. Woods <[e-mail]>
#
# NOTE:  BIND doesn't build a profiled libresolv_p.a, but probably should.

#
# bindtree should be set to the root directory of the BIND distribution,
# or you can have this script attempt to determine the location dynamically
#
#bindtree=/usr/obj/local/bind

#
# SHLIBDIR should be set to the location of your shared object file
# (libc_pic.a and/or libcs5_pic.a).  If it is in the default location,
# they will be found automatically.
#
#SHLIBDIR=/usr/lib/shlib.etc

#
# USELORDER will determine whether, under SunOS, that the lorder-sparc
# file under SHLIBDIR will be user and modified (0), or whether the file
# will be regenerated dynamically (1).  Purists would say that modifying the
# lorder-sparc file will reduce paging, but regenerating the file with
# lorder will do an adequate job of arranging the objects.  Under NetBSD,
# this option doesn't do anything, since the shared libraries are
# arranged using lorder when they are built, anyways.
#
USELORDER=0

#
# END OF USER CONFIGURABLE OPTIONS
#

extract_arch ()
{
	ARCHIVE=$1
	DIRECTORY=$2

	if [ ! -r $SHLIBDIR/$ARCHIVE ] ; then
		echo "The shared object archive, $ARCHIVE, does not exist in the" >&2
		echo "\$SHLIBDIR directory, $SHLIBDIR, or is not readable.  Please check" >&2
		echo "the file and/or path and run this script again." >&2
		exit 1
	fi

	if [ -r $DIRECTORY -a ! -d $DIRECTORY ] ; then
		echo "Weird.  $DIRECTORY wasn't a directory..."
		rm -f $DIRECTORY
	elif [ -d $DIRECTORY ] ; then
		echo "Cleaning up $DIRECTORY directory..."
		rm -rf $DIRECTORY
	fi

	if mkdir $DIRECTORY; then
		:
	else
		echo "Unable to create the \'$DIRECTORY\' directory under the current directory." >&2
		exit 1
	fi

	# Extract the files to the tmp directory in a subshell

	(
		if cd $DIRECTORY ; then
			:
		else
			echo "Unable to change directories to the \'$DIRECTORY\' directory." >&2
			exit 1
		fi

		echo "Extracting object files from the shared object archive..."

		ar x $SHLIBDIR/$ARCHIVE

		# Patch up the files and filenames that need patching up.

		case "${arch}" in
		SunOS)
			for i in *.; do
				mv $i ${i}o
			done
			;;
		esac

		echo "Deleting old resolver files..."

		rm -f $JUNKOBJS

		# Extract the shared objects from the BIND distribution

		echo "Unpacking new resolver files..."

		if [ -f $bindtree/shres/netbsd/libresolv_pic.a ]; then
			ar x $bindtree/shres/netbsd/libresolv_pic.a
			rm -f __.SYMDEF
		fi
	)

}

generate_lorder ()
{
	case "${arch}" in
	SunOS)
		if [ $USELORDER -eq 0 -a -f $SHLIBDIR/lorder-sparc ]; then
			sed -f lorder-sparc.sed /usr/lib/shlib.etc/lorder-sparc >lorder.tmp
			$SHLIBDIR/objsort lorder.tmp $1 > lorder.$1
			rm -f lorder.tmp
		else
			lorder $1/*.o | tsort > lorder.$1 2>/dev/null
		fi
		;;
	NetBSD|BSD/386)
		lorder $1/*.so $1/*.o | tsort > lorder.$1 2>/dev/null
		;;
	esac
}

OPATH=$PATH
PATH=/usr/bin:/usr/etc:/usr/sbin:/sbin:/usr/ucb:${PATH} ; export PATH
arch=`uname -s`
PATH=$OPATH ; export PATH

case "${arch}" in
SunOS)
	JUNKOBJS="gethostent.o"
	PATH="/usr/bin:/usr/etc:/sbin:/usr/ucb:${PATH}" ; export PATH
	;;
BSD/386)
	release=`uname -r`
	if [ `expr "$release" - 2` -lt 0 ] ; then
		echo "$0: can't work on $arch $release" >&2
		exit 1
	fi
	# XXX: FIXME: this is may not be correct....
	JUNKOBJS="gethostnamadr.so \
		herror.so res_debug.so res_data.so \
		res_comp.so res_init.so res_mkquery.so res_query.so res_send.so \
		getnetbyaddr.so getnetbyname.so getnetent.so getnetnamadr.so \
		gethnamaddr.so sethostent.so nsap_addr.so \
		inet_addr.so"
	PATH="/bin:/usr/bin:/usr/sbin:/sbin:${PATH}" ; export PATH
	;;
NetBSD)
	JUNKOBJS="gethostnamadr.so \
		herror.so res_debug.so res_data.so \
		res_comp.so res_init.so res_mkquery.so res_query.so res_send.so \
		getnetbyaddr.so getnetbyname.so getnetent.so getnetnamadr.so \
		gethnamaddr.so sethostent.so nsap_addr.so \
		inet_addr.so"
	PATH="/bin:/usr/bin:/usr/sbin:/sbin:${PATH}" ; export PATH
	;;
FreeBSD)
	echo "$0: Not yet tested on $arch `uname -r`...." >&2
	exit 1
	;;
*)
	echo "$0: cannot determine correct OS type, found '${arch}'." >&2
	exit 1
	;;
esac

# Try to determine where the root of the BIND tree is if $bindtree isn't
# set.  First, see if it is one directory above wherever the script is
# being run from, then check and see if it is around the current directory
# somewhere

thisdir=`pwd`

if [ -z "${bindtree}" ]; then
	if [ -d "${thisdir}/shres/netbsd" ]; then
		bindtree=$thisdir
	elif [ -d "${thisdir}/../../shres" ]; then
		bindtree=${thisdir}/../../
	fi
fi

if [ -z "${bindtree}" ]; then
	echo "I can't find the bind tree, and you didn't set \$bindtree." >&2
	echo "Please do so, and try again." >&2
	exit 1
fi

if [ ! -d $bindtree ]; then
	echo "Your \$bindtree variable is set incorrectly.  Please correct it" >&2
	echo "and run this script again." >&2
	exit 1
fi

if [ ! -f $bindtree/shres/netbsd/libresolv_pic.a ]; then
	echo "Please build shres/netbsd/libresolv_pic.a before running this script." >&2
	echo "See shres/INSTALL for more information." >&2
	exit 1
fi

# Determine the directory to get the shared object archives from, if
# $SHLIBDIR is not set

case "${arch}" in
SunOS)
	SHLIBDIR=${SHLIBDIR-/usr/lib/shlib.etc}
	;;
NetBSD|BSD/386)
	SHLIBDIR=${SHLIBDIR-/usr/lib}
	;;
esac

# Extract the UCB libraries on both SunOS and *BSD

extract_arch libc_pic.a ucbtmp

# Extract the SYSV libraries on SunOS

case "${arch}" in
SunOS)
	extract_arch libcs5_pic.a sysvtmp
	;;
esac

# Now that we have all of the objects we're going to need, generate an
# lorder listing of the objects that we have, or modify the current
# lorder-sparc file.

echo "Generating new lorder file for UCB libc archive..."

generate_lorder ucbtmp

case "${arch}" in
SunOS)
	echo "Generating new lorder file for SunOS SysV libc archive..."
	generate_lorder sysvtmp
	;;
esac

SHLIBNAME=libc.so.`/bin/ls /usr/lib/libc.so.* | awk -f shlibname.awk`

echo "Generating new $SHLIBNAME shared library..."

case "${arch}" in
SunOS)
	ld -o $SHLIBNAME -assert pure-text `cat lorder.ucbtmp` -ldl
	if [ $? -ne 0 ] ; then
		exit 1
	fi
	SH5LIBNAME=libcs5.so.`/bin/ls /usr/5lib/libc.so.* | awk -f shlibname.awk`
	echo "Generating new $SH5LIBNAME shared library..."
	ld -o $SH5LIBNAME -assert pure-text `cat lorder.sysvtmp` -ldl
	if [ $? -ne 0 ] ; then
		exit 1
	fi
	echo "WARNING:  not updating /usr/lib/libc.a or /usr/5lib/libc.a -- use -lresolv"
	;;
NetBSD|BSD/386)
	VER=`/bin/ls /usr/lib/libresolv.so.* | awk -f shlibname.awk`
	ld -x -o libresolv.so.$VER -Bshareable -Bforcearchive $bindtree/shres/netbsd/libresolv_pic.a
	ld -x -o $SHLIBNAME -Bshareable -Bforcearchive `cat lorder.ucbtmp`
	if [ $? -ne 0 ] ; then
		exit 1
	fi
	echo "WARNING:  not updating /usr/lib/libc.a -- use -lresolve instead."
	;;
esac

echo "Now we will test the new $SHLIBNAME..."

# we won't bother testing the SunOS libcs5.so* -- it should be OK....

LD_LIBRARY_PATH=`pwd` who am i

echo -n 'Does the output of who shown above look normal? [n] '
read answer junk

case "$answer" in
[yY]*)
	echo "OK, we'll copy them into place!"
	;;
*)
	echo "Something went wrong.  Try fixing it and re-running this script."
	exit 1
	;;
esac

set -x
cp $SHLIBNAME /usr/lib
cp $bindtree/shres/netbsd/libresolv_pic.a $SHLIBDIR
case "${arch}" in
SunOS)
	cp $SH5LIBNAME /usr/5lib
	;;
NetBSD|BSD/386)
	cp libresolv.so.$VER /usr/lib
	;;
esac
set +x

case "${arch}" in
SunOS)
	echo 'OK, they are in place now...  updating libc.sa*, running ranlib...'
	VUCB=`/bin/ls /usr/lib/libc.so.* | awk -f shlibname.awk`
	VS5=`/bin/ls /usr/5lib/libc.so.* | awk -f shlibname.awk`
	VUCB_OLD=`echo $VUCB | awk -F. '$3 > 1 {printf("%d.%d.%d", $1, $2, $3 - 1) }
					$3 <= 1 {printf("%d.%d", $1, $2) }'`
	VS5_OLD=`echo $VS5 | awk -F. '$3 > 1 {printf("%d.%d.%d", $1, $2, $3 - 1) }
					$3 <= 1 {printf("%d.%d", $1, $2) }'`
	cp /usr/lib/libc.sa.$VUCB_OLD /usr/lib/libc.sa.$VUCB
	cp /usr/5lib/libc.sa.$VS5_OLD /usr/5lib/libc.sa.$VS5
	ranlib -t /usr/lib/libc.sa.*
	ranlib -t /usr/5lib/libc.sa.*
	;;
esac

echo 'Running ldconfig...'

LD_LIBRARY_PATH="" ldconfig

case "${arch}" in
SunOS)
	echo "For a simple test of $SHLIBNAME run 'trace /usr/bin/who'"
	echo "and check which shared library is used."
	echo "Run 'trace /usr/5bin/cat < /dev/null' to test $SH5LIBNAME."
	;;
esac

echo 'You should now test a number of tools that do name resolution,'
echo 'such as telnet, rlogin, ftp, etc.'
echo ''
echo 'If something breaks, remove the new shared libraries copied above and'
echo 're-run "ldconfig".'

exit 0