mkdep

unix/linux下的路由守护程序

#! /bin/sh
#
# Public Release 3
# 
# $Id: mkdep,v 1.4 1998/09/15 16:48:47 wfs Exp $
#
# ------------------------------------------------------------------------
# 
# Copyright (c) 1996, 1997 The Regents of the University of Michigan
# All Rights Reserved
#  
# Royalty-free licenses to redistribute GateD Release
# 3 in whole or in part may be obtained by writing to:
# 
# 	Merit GateDaemon Project
# 	4251 Plymouth Road, Suite C
# 	Ann Arbor, MI 48105
#  
# THIS SOFTWARE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER
# EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION WARRANTIES OF 
# MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE REGENTS OF THE
# UNIVERSITY OF MICHIGAN AND MERIT DO NOT WARRANT THAT THE
# FUNCTIONS CONTAINED IN THE SOFTWARE WILL MEET LICENSEE'S REQUIREMENTS OR
# THAT OPERATION WILL BE UNINTERRUPTED OR ERROR FREE. The Regents of the
# University of Michigan and Merit shall not be liable for
# any special, indirect, incidental or consequential damages with respect
# to any claim by Licensee or any third party arising from use of the
# software. GateDaemon was originated and developed through release 3.0
# by Cornell University and its collaborators.
# 
# Please forward bug fixes, enhancements and questions to the
# gated mailing list: [e-mail].
# 
# ------------------------------------------------------------------------
# 
# Copyright (c) 1990,1991,1992,1993,1994,1995 by Cornell University.
#     All rights reserved.
# 
# THIS SOFTWARE IS PROVIDED "AS IS" AND WITHOUT ANY
# EXPRESS OR IMPLIED WARRANTIES, INCLUDING, WITHOUT
# LIMITATION, THE IMPLIED WARRANTIES OF MERCHANTABILITY
# AND FITNESS FOR A PARTICULAR PURPOSE.
# 
# GateD is based on Kirton's EGP, UC Berkeley's routing
# daemon	 (routed), and DCN's HELLO routing Protocol.
# Development of GateD has been supported in part by the
# National Science Foundation.
# 
# ------------------------------------------------------------------------
# 
# Portions of this software may fall under the following
# copyrights:
# 
# Copyright (c) 1988 Regents of the University of California.
# All rights reserved.
# 
# Redistribution and use in source and binary forms are
# permitted provided that the above copyright notice and
# this paragraph are duplicated in all such forms and that
# any documentation, advertising materials, and other
# materials related to such distribution and use
# acknowledge that the software was developed by the
# University of California, Berkeley.  The name of the
# University may not be used to endorse or promote
# products derived from this software without specific
# prior written permission.  THIS SOFTWARE IS PROVIDED
# ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES,
# INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
# MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
#
#
#PATH=/bin:/usr/bin:/usr/ucb
#export PATH

if [ $# = 0 ] ; then
	echo 'usage: mkdep [-p] [-f makefile] [flags] file ...'
	exit 1
fi

FLAG=-M
SED=
MAKE=Makefile			# default makefile name is "Makefile"
case $1 in
	# -f allows you to select a makefile name
	-f)
		MAKE=$2
		shift; shift
		;;

	# the -p flag produces "program: program.c" style dependencies
	# so .o's don't get produced
	-p)
		SED='-e s;\.o;;'
		shift
		;;

	-flag)
		FLAG=$2
		shift;shift
		;;

	-cc)
		CC=$2
		shift;shift
		;;
esac

if [ ! -w $MAKE ]; then
	echo "mkdep: no writeable file \"$MAKE\""
	exit 1
fi

TMP=/tmp/mkdep$$

trap 'rm -f $TMP ; exit 1' 1 2 3 13 15

cp $MAKE ${MAKE}.bak

sed -e '/DO NOT DELETE THIS LINE/,$d' < $MAKE > $TMP

cat << _EOF_ >> $TMP
# DO NOT DELETE THIS LINE -- mkdep uses it.
# DO NOT PUT ANYTHING AFTER THIS LINE, IT WILL GO AWAY.

_EOF_

${CC-cc} ${FLAG} $* | sed -e "s; \./; ;g" $SED | \
	awk ' { \
		if ($1 != prev) { \
			if (rec != "") \
				print rec; rec = $0; prev = $1; \
		} \
		else { \
			if (length(rec $2) > 78) { \
				print rec; rec = $0; \
			} else \
				rec = rec " " $2 \
		} \
	} \
	END { \
		print rec \
	} ' >> $TMP

cat << _EOF_ >> $TMP

# IF YOU PUT ANYTHING HERE IT WILL GO AWAY
_EOF_

# copy to preserve permissions
cp $TMP $MAKE
rm -f ${MAKE}.bak $TMP
exit 0