#!/bin/sh# SPDX-License-Identifier: GPL-2.0 if [ $# -ne 2 ]then	echo "Usage: headers_install.sh INFILE OUTFILE"	echo	echo "Prepares kernel header files for use by user space, by removing"	echo "all compiler.h definitions and #includes, removing any"	echo "#ifdef __KERNEL__ sections, and putting __underscores__ around"	echo "asm/inline/volatile keywords."	echo	echo "INFILE: header file to operate on"	echo "OUTFILE: output file which the processed header is written to" 	exit 1fi # Grab argumentsINFILE=$1OUTFILE=$2TMPFILE=$OUTFILE.tmp trap 'rm -f $OUTFILE $TMPFILE' EXIT # SPDX-License-Identifier with GPL variants must have "WITH Linux-syscall-note"if [ -n "$(sed -n -e "/SPDX-License-Identifier:.*GPL-/{/WITH Linux-syscall-note/!p}" $INFILE)" ]; then	echo "error: $INFILE: missing \"WITH Linux-syscall-note\" for SPDX-License-Identifier" >&2	exit 1fi sed -E -e '	s/([[:space:](])(__user|__force|__iomem)[[:space:]]/\1/g	s/__attribute_const__([[:space:]]|$)/\1/g	s@^#include <linux/compiler.h>@@	s/(^|[^a-zA-Z0-9])__packed([^a-zA-Z0-9_]|$)/\1__attribute__((packed))\2/g	s/(^|[[:space:](])(inline|asm|volatile)([[:space:](]|$)/\1__\2__\3/g	s@#(ifndef|define|endif[[:space:]]*/[*])[[:space:]]*_UAPI@#\1 @	s/__ASSEMBLY__/__ASSEMBLER__/g' $INFILE > $TMPFILE || exit 1 scripts/unifdef -U__KERNEL__ -D__EXPORTED_HEADERS__ $TMPFILE > $OUTFILE[ $? -gt 1 ] && exit 1 # Remove /* ... */ style comments, and find CONFIG_ references in codeconfigs=$(sed -e ':comment	s:/\*[^*][^*]*:/*:	s:/\*\*\**\([^/]\):/*\1:	t comment	s:/\*\*/: :	t comment	/\/\*/! b check	N	b comment:print	P	D:check	s:^\(CONFIG_[[:alnum:]_]*\):\1\n:	t print	s:^[[:alnum:]_][[:alnum:]_]*::	s:^[^[:alnum:]_][^[:alnum:]_]*::	t check	d' $OUTFILE) for c in $configsdo	echo "error: $INFILE: leak $c to user-space" >&2	exit 1done rm -f $TMPFILEtrap - EXIT