linux/scripts/headers_install.sh
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   1#!/bin/sh
   2
   3if [ $# -lt 1 ]
   4then
   5        echo "Usage: headers_install.sh OUTDIR [FILES...]
   6        echo
   7        echo "Prepares kernel header files for use by user space, by removing"
   8        echo "all compiler.h definitions and #includes, removing any"
   9        echo "#ifdef __KERNEL__ sections, and putting __underscores__ around"
  10        echo "asm/inline/volatile keywords."
  11        echo
  12        echo "OUTDIR: directory to write each userspace header FILE to."
  13        echo "FILES:  list of header files to operate on."
  14
  15        exit 1
  16fi
  17
  18# Grab arguments
  19
  20OUTDIR="$1"
  21shift
  22
  23# Iterate through files listed on command line
  24
  25FILE=
  26trap 'rm -f "$OUTDIR/$FILE" "$OUTDIR/$FILE.sed"' EXIT
  27for i in "$@"
  28do
  29        FILE="$(basename "$i")"
  30        sed -r \
  31                -e 's/([ \t(])(__user|__force|__iomem)[ \t]/\1/g' \
  32                -e 's/__attribute_const__([ \t]|$)/\1/g' \
  33                -e 's@^#include <linux/compiler.h>@@' \
  34                -e 's/(^|[^a-zA-Z0-9])__packed([^a-zA-Z0-9_]|$)/\1__attribute__((packed))\2/g' \
  35                -e 's/(^|[ \t(])(inline|asm|volatile)([ \t(]|$)/\1__\2__\3/g' \
  36                -e 's@#(ifndef|define|endif[ \t]*/[*])[ \t]*_UAPI@#\1 @' \
  37                "$i" > "$OUTDIR/$FILE.sed" || exit 1
  38        scripts/unifdef -U__KERNEL__ -D__EXPORTED_HEADERS__ "$OUTDIR/$FILE.sed" \
  39                > "$OUTDIR/$FILE"
  40        [ $? -gt 1 ] && exit 1
  41        rm -f "$OUTDIR/$FILE.sed"
  42done
  43trap - EXIT
  44
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