scripts/headers_install.sh

   1 #!/bin/sh
   2 # SPDX-License-Identifier: GPL-2.0
   3
   4 if [ $# -ne 2 ]
   5 then
   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
  17 fi
  18
  19 # Grab arguments
  20 INFILE=$1
  21 OUTFILE=$2
  22 TMPFILE=$OUTFILE.tmp
  23
  24 trap 'rm -f $OUTFILE $TMPFILE' EXIT
  25
  26 # SPDX-License-Identifier with GPL variants must have "WITH Linux-syscall-note"
  27 if [ -n "$(sed -n -e "/SPDX-License-Identifier:.*GPL-/{/WITH Linux-syscall-note/!p}" $INFILE)" ]; then
  28         echo "error: $INFILE: missing \"WITH Linux-syscall-note\" for SPDX-License-Identifier" >&2
  29         exit 1
  30 fi
  31
  32 sed -E -e '
  33         s/([[:space:](])(__user|__force|__iomem)[[:space:]]/\1/g
  34         s/__attribute_const__([[:space:]]|$)/\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
  41 scripts/unifdef -U__KERNEL__ -D__EXPORTED_HEADERS__ $TMPFILE > $OUTFILE
  42 [ $? -gt 1 ] && exit 1
  43
  44 rm -f $TMPFILE
  45 trap - EXIT