scripts/headers_install.sh

   1 #!/bin/sh
   2 # SPDX-License-Identifier: GPL-2.0
   3
   4 if [ $# -lt 2 ]
   5 then
   6         echo "Usage: headers_install.sh OUTDIR SRCDIR [FILES...]"
   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 "OUTDIR: directory to write each userspace header FILE to."
  14         echo "SRCDIR: source directory where files are picked."
  15         echo "FILES:  list of header files to operate on."
  16
  17         exit 1
  18 fi
  19
  20 # Grab arguments
  21
  22 OUTDIR="$1"
  23 shift
  24 SRCDIR="$1"
  25 shift
  26
  27 # Iterate through files listed on command line
  28
  29 FILE=
  30 trap 'rm -f "$OUTDIR/$FILE" "$OUTDIR/$FILE.sed"' EXIT
  31 for i in "$@"
  32 do
  33         FILE="$(basename "$i")"
  34         sed -E \
  35                 -e 's/([[:space:](])(__user|__force|__iomem)[[:space:]]/\1/g' \
  36                 -e 's/__attribute_const__([[:space:]]|$)/\1/g' \
  37                 -e 's@^#include <linux/compiler(|_types).h>@@' \
  38                 -e 's/(^|[^a-zA-Z0-9])__packed([^a-zA-Z0-9_]|$)/\1__attribute__((packed))\2/g' \
  39                 -e 's/(^|[[:space:](])(inline|asm|volatile)([[:space:](]|$)/\1__\2__\3/g' \
  40                 -e 's@#(ifndef|define|endif[[:space:]]*/[*])[[:space:]]*_UAPI@#\1 @' \
  41                 "$SRCDIR/$i" > "$OUTDIR/$FILE.sed" || exit 1
  42         scripts/unifdef -U__KERNEL__ -D__EXPORTED_HEADERS__ "$OUTDIR/$FILE.sed" \
  43                 > "$OUTDIR/$FILE"
  44         [ $? -gt 1 ] && exit 1
  45         rm -f "$OUTDIR/$FILE.sed"
  46 done
  47 trap - EXIT