linux/scripts/headers_install.sh
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   1#!/bin/sh
   2
   3if [ $# -lt 1 ]
   4then
   5        echo "Usage: headers_install.sh OUTDIR SRCDIR [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 "SRCDIR: source directory where files are picked."
  14        echo "FILES:  list of header files to operate on."
  15
  16        exit 1
  17fi
  18
  19# Grab arguments
  20
  21OUTDIR="$1"
  22shift
  23SRCDIR="$1"
  24shift
  25
  26# Iterate through files listed on command line
  27
  28FILE=
  29trap 'rm -f "$OUTDIR/$FILE" "$OUTDIR/$FILE.sed"' EXIT
  30for i in "$@"
  31do
  32        FILE="$(basename "$i")"
  33        sed -r \
  34                -e 's/([ \t(])(__user|__force|__iomem)[ \t]/\1/g' \
  35                -e 's/__attribute_const__([ \t]|$)/\1/g' \
  36                -e 's@^#include <linux/compiler.h>@@' \
  37                -e 's/(^|[^a-zA-Z0-9])__packed([^a-zA-Z0-9_]|$)/\1__attribute__((packed))\2/g' \
  38                -e 's/(^|[ \t(])(inline|asm|volatile)([ \t(]|$)/\1__\2__\3/g' \
  39                -e 's@#(ifndef|define|endif[ \t]*/[*])[ \t]*_UAPI@#\1 @' \
  40                "$SRCDIR/$i" > "$OUTDIR/$FILE.sed" || exit 1
  41        scripts/unifdef -U__KERNEL__ -D__EXPORTED_HEADERS__ "$OUTDIR/$FILE.sed" \
  42                > "$OUTDIR/$FILE"
  43        [ $? -gt 1 ] && exit 1
  44        rm -f "$OUTDIR/$FILE.sed"
  45done
  46trap - EXIT
  47
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