auto import from //depot/cupcake/@135843
diff --git a/linux/ioctlent.sh b/linux/ioctlent.sh
new file mode 100644
index 0000000..8f3d74b
--- /dev/null
+++ b/linux/ioctlent.sh
@@ -0,0 +1,89 @@
+#! /bin/sh
+#
+# Copyright (c) 2001 Wichert Akkerman <wichert@cistron.nl>
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions
+# are met:
+# 1. Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+# 2. Redistributions in binary form must reproduce the above copyright
+# notice, this list of conditions and the following disclaimer in the
+# documentation and/or other materials provided with the distribution.
+# 3. The name of the author may not be used to endorse or promote products
+# derived from this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+# IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+# OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+# IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+# NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+# THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+#
+# $Id: ioctlent.sh,v 1.12 2004/10/06 22:31:38 roland Exp $
+#
+
+# Validate arg count.
+case $# in
+1)
+ dir="$1"
+ asm=asm
+ ;;
+2)
+ dir="$1"
+ asm="$2"
+ ;;
+*)
+ echo "usage: $0 include-directory [asm-subdirectory]" >&2
+ exit 1
+ ;;
+esac
+
+lookup_ioctls()
+{
+ type="$1"
+ shift
+
+ # Build the list of all ioctls
+ regexp='^[[:space:]]*#[[:space:]]*define[[:space:]]\+[A-Z][A-Z0-9_]*[[:space:]]\+0x'"$type"'..\>'
+ (cd "$dir" ; grep "$regexp" "$@" /dev/null 2>/dev/null ) |
+ sed -ne "s,$asm/,asm/,g"'
+s/^\(.*\):[[:space:]]*#[[:space:]]*define[[:space:]]*\([A-Z0-9_]*\)[[:space:]]*\(0x'"$type"'..\).*/ { "\1", "\2", \3 },/p' \
+ >> ioctls.h
+}
+
+: > ioctls.h
+lookup_ioctls 22 scsi/sg.h
+lookup_ioctls 46 linux/fb.h
+lookup_ioctls 4B linux/kd.h
+lookup_ioctls 53 linux/cdrom.h scsi/scsi.h scsi/scsi_ioctl.h
+lookup_ioctls 54 $asm/ioctls.h
+lookup_ioctls 56 linux/vt.h
+lookup_ioctls '7[12]' linux/videotext.h
+lookup_ioctls 89 $asm/sockios.h linux/sockios.h
+lookup_ioctls 8B linux/wireless.h
+
+files="linux/* $asm/* scsi/* sound/*"
+
+# Build the list of all ioctls
+regexp='^[[:space:]]*#[[:space:]]*define[[:space:]]\+[A-Z][A-Z0-9_]*[[:space:]]\+_S\?\(IO\|IOW\|IOR\|IOWR\)\>'
+(cd $dir ; grep $regexp $files 2>/dev/null ) | \
+ sed -ne "s,$asm/,asm/,g"'
+s/^\(.*\):[[:space:]]*#[[:space:]]*define[[:space:]]*\([A-Z0-9_]*\)[[:space:]]*_S\?I.*(\([^[,]*\)[[:space:]]*,[[:space:]]*\([^,)]*\).*/ { "\1", "\2", _IOC(_IOC_NONE,\3,\4,0) },/p' \
+ >> ioctls.h
+
+# Some use a special base to offset their ioctls on. Extract that as well.
+: > ioctldefs.h
+
+bases=$(sed -ne 's/.*_IOC_NONE.*,[[:space:]]*\([A-Z][A-Z0-9_]\+\)[[:space:]+,].*/\1/p' ioctls.h | uniq | sort)
+for base in $bases ; do
+ echo "Looking for $base"
+ regexp="^[[:space:]]*#[[:space:]]*define[[:space:]]\+$base"
+ (cd $dir ; grep -h $regexp 2>/dev/null $files ) | \
+ grep -v '\<_IO' >> ioctldefs.h
+done