#!/bin/sh # SPDX-License-Identifier: GPL-2.0 if [ $# -lt 2 ] then echo "Usage: headers_install.sh OUTDIR SRCDIR [FILES...]" 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 "OUTDIR: directory to write each userspace header FILE to." echo "SRCDIR: source directory where files are picked." echo "FILES: list of header files to operate on." exit 1 fi # Grab arguments OUTDIR="$1" shift SRCDIR="$1" shift # Iterate through files listed on command line FILE= trap 'rm -f "$OUTDIR/$FILE" "$OUTDIR/$FILE.sed"' EXIT for i in "$@" do FILE="$(basename "$i")" sed -E \ -e 's/([[:space:](])(__user|__force|__iomem)[[:space:]]/\1/g' \ -e 's/__attribute_const__([[:space:]]|$)/\1/g' \ -e 's@^#include <linux/compiler(|_types).h>@@' \ -e 's/(^|[^a-zA-Z0-9])__packed([^a-zA-Z0-9_]|$)/\1__attribute__((packed))\2/g' \ -e 's/(^|[[:space:](])(inline|asm|volatile)([[:space:](]|$)/\1__\2__\3/g' \ -e 's@#(ifndef|define|endif[[:space:]]*/[*])[[:space:]]*_UAPI@#\1 @' \ "$SRCDIR/$i" > "$OUTDIR/$FILE.sed" || exit 1 scripts/unifdef -U__KERNEL__ -D__EXPORTED_HEADERS__ "$OUTDIR/$FILE.sed" \ > "$OUTDIR/$FILE" [ $? -gt 1 ] && exit 1 rm -f "$OUTDIR/$FILE.sed" done trap - EXIT