xref: /freebsd/bin/sh/mkbuiltins (revision e9ac41698b2f322d55ccf9da50a3596edb2c1800)
1#!/bin/sh -
2
3#-
4# Copyright (c) 1991, 1993
5#	The Regents of the University of California.  All rights reserved.
6#
7# This code is derived from software contributed to Berkeley by
8# Kenneth Almquist.
9#
10# Redistribution and use in source and binary forms, with or without
11# modification, are permitted provided that the following conditions
12# are met:
13# 1. Redistributions of source code must retain the above copyright
14#    notice, this list of conditions and the following disclaimer.
15# 2. Redistributions in binary form must reproduce the above copyright
16#    notice, this list of conditions and the following disclaimer in the
17#    documentation and/or other materials provided with the distribution.
18# 3. Neither the name of the University nor the names of its contributors
19#    may be used to endorse or promote products derived from this software
20#    without specific prior written permission.
21#
22# THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
23# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25# ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
26# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32# SUCH DAMAGE.
33
34temp=`mktemp -t ka`
35srcdir=$1
36havejobs=0
37if grep '^#define[	 ]*JOBS[	 ]*1' $srcdir/shell.h > /dev/null
38then	havejobs=1
39fi
40exec > builtins.c
41cat <<\!
42/*
43 * This file was generated by the mkbuiltins program.
44 */
45
46#include <stdlib.h>
47#include "shell.h"
48#include "builtins.h"
49
50!
51awk '/^[^#]/ {if('$havejobs' || $2 != "-j") \
52    print $0}' $srcdir/builtins.def | sed 's/-j//' > $temp
53echo 'int (*const builtinfunc[])(int, char **) = {'
54awk '/^[^#]/ {	printf "\t%s,\n", $1}' $temp
55echo '};
56
57const unsigned char builtincmd[] = {'
58awk '{	for (i = 2 ; i <= NF ; i++) {
59		if ($i == "-s") {
60			spc = 1;
61		} else if ($i == "-n") {
62			# Handled later for builtins.h
63			continue
64		} else {
65			printf "\t\"\\%03o\\%03o%s\"\n", length($i), (spc ? 128 : 0) + NR-1, $i
66			spc = 0;
67		}
68	}}' $temp
69echo '};'
70
71exec > builtins.h
72cat <<\!
73/*
74 * This file was generated by the mkbuiltins program.
75 */
76
77#include <sys/cdefs.h>
78!
79tr abcdefghijklmnopqrstuvwxyz ABCDEFGHIJKLMNOPQRSTUVWXYZ < $temp |
80	awk '{	printf "#define %s %d\n", $1, NR-1}'
81echo '
82#define BUILTIN_SPECIAL 0x80
83
84extern int (*const builtinfunc[])(int, char **);
85extern const unsigned char builtincmd[];
86'
87awk '{	printf "int %s(int, char **);\n", $1}' $temp
88
89# Build safe_builtin_always()
90cat <<EOF
91
92static inline int
93safe_builtin_always(int idx)
94{
95EOF
96awk '
97BEGIN { printed = 0 }
98{
99	for (i = 2 ; i <= NF ; i++) {
100		if ($i == "-s") {
101			continue
102		} else if ($i == "-n") {
103			nofork = 1;
104		} else {
105			if (nofork == 0) {
106				continue
107			}
108			if (printed == 1) {
109				printf " || \n\t    "
110			} else {
111				printf "\tif ("
112			}
113			printf "idx == " toupper($1)
114			printed = 1
115			nofork = 0;
116			# Only need to check each once
117			break
118		}
119	}
120}' $temp
121
122cat << EOF
123)
124		return (1);
125	return(0);
126}
127EOF
128
129rm -f $temp
130