mkbuil~1

操作系统源代码

#!/bin/sh -
#
# Copyright (c) 1991 The Regents of the University of California.
# All rights reserved.
#
# This code is derived from software contributed to Berkeley by
# Kenneth Almquist.
#
# 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.
# 3. All advertising materials mentioning features or use of this software
#    must display the following acknowledgement:
#	This product includes software developed by the University of
#	California, Berkeley and its contributors.
# 4. Neither the name of the University nor the names of its contributors
#    may be used to endorse or promote products derived from this software
#    without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
#
#	@(#)mkbuiltins	5.2 (Berkeley) 3/8/91

# All calls to awk removed, because Minix bawk is deficient.  (kjb)

if [ $# != 2 ]
then
	echo "USAGE: $0 shell.h builtins"
	exit 1
fi
SHL=$1
BLTINS=$2

temp=/tmp/ka$$
exec > builtins.c
cat <<\!
/*
 * This file was generated by the mkbuiltins program.
 */

#include "shell.h"
#include "builtins.h"

!
if grep '^#define JOBS[	 ]*1' $SHL > /dev/null
then
	# Job control.
	sed -e '/^#/d
		s/	/ /g
		s/ #.*//
		/^ *$/d
		s/-j//' $BLTINS > $temp
else
	# No job control.
	sed -e '/^#/d
		s/	/ /g
		s/ #.*//
		/^ *$/d
		/-j/d' $BLTINS > $temp
fi
sed -e 's/ .*//
	s/\(.*\)/int \1();/' $temp
echo '
int (*const builtinfunc[])() = {'
sed -e 's/ .*//
	s/\(.*\)/	\1,/' $temp
echo '};

const struct builtincmd builtincmd[] = {'
i=0
while read line
do
	set -$- $line
	shift
	for fun
	do
		echo "	\"$fun\", $i,"
	done
	i=`expr $i + 1`
done < $temp
echo '	NULL, 0
};'

exec > builtins.h
cat <<\!
/*
 * This file was generated by the mkbuiltins program.
 */

#include <sys/cdefs.h>
!
i=0
tr abcdefghijklmnopqrstuvwxyz ABCDEFGHIJKLMNOPQRSTUVWXYZ < $temp |
	while read line
	do
		set -$- $line
		echo "#define $1 $i"
		i=`expr $i + 1`
	done
echo '
struct builtincmd {
      char *name;
      int code;
};

extern int (*const builtinfunc[])();
extern const struct builtincmd builtincmd[];'
rm -f $temp