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|
#!/bin/sh -
#-
# Copyright (c) 1991, 1993
# 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. 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.
temp=`mktemp -t ka`
srcdir=$1
havejobs=0
if grep '^#define[ ]*JOBS[ ]*1' $srcdir/shell.h > /dev/null
then havejobs=1
fi
exec > builtins.c
cat <<\!
/*
* This file was generated by the mkbuiltins program.
*/
#include <stdlib.h>
#include "shell.h"
#include "builtins.h"
!
awk '/^[^#]/ {if('$havejobs' || $2 != "-j") \
print $0}' $srcdir/builtins.def | sed 's/-j//' > $temp
echo 'int (*const builtinfunc[])(int, char **) = {'
awk '/^[^#]/ { printf "\t%s,\n", $1}' $temp
echo '};
const unsigned char builtincmd[] = {'
awk '{ for (i = 2 ; i <= NF ; i++) {
if ($i == "-s") {
spc = 1;
} else if ($i == "-n") {
# Handled later for builtins.h
continue
} else {
printf "\t\"\\%03o\\%03o%s\"\n", length($i), (spc ? 128 : 0) + NR-1, $i
spc = 0;
}
}}' $temp
echo '};'
exec > builtins.h
cat <<\!
/*
* This file was generated by the mkbuiltins program.
*/
#include <sys/cdefs.h>
!
tr abcdefghijklmnopqrstuvwxyz ABCDEFGHIJKLMNOPQRSTUVWXYZ < $temp |
awk '{ printf "#define %s %d\n", $1, NR-1}'
echo '
#define BUILTIN_SPECIAL 0x80
extern int (*const builtinfunc[])(int, char **);
extern const unsigned char builtincmd[];
'
awk '{ printf "int %s(int, char **);\n", $1}' $temp
# Build safe_builtin_always()
cat <<EOF
static inline int
safe_builtin_always(int idx)
{
EOF
awk '
BEGIN { printed = 0 }
{
for (i = 2 ; i <= NF ; i++) {
if ($i == "-s") {
continue
} else if ($i == "-n") {
nofork = 1;
} else {
if (nofork == 0) {
continue
}
if (printed == 1) {
printf " || \n\t "
} else {
printf "\tif ("
}
printf "idx == " toupper($1)
printed = 1
nofork = 0;
# Only need to check each once
break
}
}
}' $temp
cat << EOF
)
return (1);
return(0);
}
EOF
rm -f $temp
|
