usr/src/bin/sh/mkbuiltins

#!/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.
#
# %sccs.include.redist.sh%
#
#       @(#)mkbuiltins  5.1 (Berkeley) %G%

temp=/tmp/ka$$
havejobs=0
if grep '^#define JOBS[  ]*1' shell.h > /dev/null
then    havejobs=1
fi
exec > obj/builtins.c
cat <<\!
/*
 * This file was generated by the mkbuiltins program.
 */

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

!
awk '/^[^#]/ {if('$havejobs' || $2 != "-j") print $0}' builtins |
        sed 's/-j//' > $temp
awk '{  printf "int %s();\n", $1}' $temp
echo '
int (*const builtinfunc[])() = {'
awk '/^[^#]/ {  printf "\t%s,\n", $1}' $temp
echo '};

const struct builtincmd builtincmd[] = {'
awk '{  for (i = 2 ; i <= NF ; i++) {
                printf "\t\"%s\", %d,\n",  $i, NR-1
        }}' $temp
echo '  NULL, 0
};'

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

!
tr abcdefghijklmnopqrstuvwxyz ABCDEFGHIJKLMNOPQRSTUVWXYZ < $temp |
        awk '{  printf "#define %s %d\n", $1, NR-1}'
echo '
struct builtincmd {
      char *name;
      int code;
};

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