Import /usr/src/bin/sh from FreeBSD 12.0-RELEASE

1 files changed, 137 insertions, 0 deletions

diff --git a/bin/cash/mkbuiltins b/bin/cash/mkbuiltins
new file mode 100755
index 00000000..32c09ec0
--- /dev/null
+++ b/bin/cash/mkbuiltins
@@ -0,0 +1,137 @@
+#!/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.
+#
+#	@(#)mkbuiltins	8.2 (Berkeley) 5/4/95
+# $FreeBSD: releng/12.0/bin/sh/mkbuiltins 328934 2018-02-06 15:41:35Z arichardson $
+
+temp=`mktemp -t ka`
+havehist=1
+if [ "X$1" = "X-h" ]; then
+	havehist=0
+	shift
+fi
+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' || $2 != "-j") && ('$havehist' || $2 != "-h")) \
+    print $0}' $srcdir/builtins.def | sed 's/-[hj]//' > $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