LXR linux/scripts/headers

   1#!/bin/sh
   2# SPDX-License-Identifier: GPL-2.0
   3
   4if [ $# -ne 2 ]
   5then
   6        echo "Usage: headers_install.sh INFILE OUTFILE"
   7        echo
   8        echo "Prepares kernel header files for use by user space, by removing"
   9        echo "all compiler.h definitions and #includes, removing any"
  10        echo "#ifdef __KERNEL__ sections, and putting __underscores__ around"
  11        echo "asm/inline/volatile keywords."
  12        echo
  13        echo "INFILE: header file to operate on"
  14        echo "OUTFILE: output file which the processed header is writen to"
  15
  16        exit 1
  17fi
  18
  19# Grab arguments
  20INFILE=$1
  21OUTFILE=$2
  22TMPFILE=$OUTFILE.tmp
  23
  24trap 'rm -f $OUTFILE $TMPFILE' EXIT
  25
  26# SPDX-License-Identifier with GPL variants must have "WITH Linux-syscall-note"
  27if [ -n "$(sed -n -e "/SPDX-License-Identifier:.*GPL-/{/WITH Linux-syscall-note/!p}" $INFILE)" ]; then
  28        echo "error: $INFILE: missing \"WITH Linux-syscall-note\" for SPDX-License-Identifier" >&2
  29        exit 1
  30fi
  31
  32sed -E -e '
  33        s/([[:space:](])(__user|__force|__iomem)[[:space:]]/\1/g
  34        s/__attribute_const__([[:space:]]|$)/\1/g
  35        s@^#include <linux/compiler(|_types).h>@@
  36        s/(^|[^a-zA-Z0-9])__packed([^a-zA-Z0-9_]|$)/\1__attribute__((packed))\2/g
  37        s/(^|[[:space:](])(inline|asm|volatile)([[:space:](]|$)/\1__\2__\3/g
  38        s@#(ifndef|define|endif[[:space:]]*/[*])[[:space:]]*_UAPI@#\1 @
  39' $INFILE > $TMPFILE || exit 1
  40
  41scripts/unifdef -U__KERNEL__ -D__EXPORTED_HEADERS__ $TMPFILE > $OUTFILE
  42[ $? -gt 1 ] && exit 1
  43
  44rm -f $TMPFILE
  45trap - EXIT
  46