diff options
Diffstat (limited to 'extra/i2c_pseudo/check_stream_open.sh')
| -rwxr-xr-x | extra/i2c_pseudo/check_stream_open.sh | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/extra/i2c_pseudo/check_stream_open.sh b/extra/i2c_pseudo/check_stream_open.sh new file mode 100755 index 0000000000..da802cb282 --- /dev/null +++ b/extra/i2c_pseudo/check_stream_open.sh @@ -0,0 +1,23 @@ +#!/bin/sh +# +# Copyright 2020 The Chromium OS Authors. All rights reserved. +# Use of this source code is governed by a BSD-style license that can be +# found in the LICENSE file. +# +# This checks whether stream_open symbol is available from the target kernel. +# +# Output meanings: +# -1 : stream_open is not available +# 0 : unknown whether or not stream_open is available +# 1 : stream_open is available + +symbols="$(< "/lib/modules/$(uname -r)/build/Module.symvers" \ + awk '{print $2}' | grep -E '^(nonseekable_open|stream_open)$')" + +if echo "${symbols}" | grep -q '^stream_open$'; then + echo 1 +elif echo "${symbols}" | grep -q '^nonseekable_open$'; then + echo -1 +else + echo 0 +fi |