blob: c57c50c8c21efd1eaae735edc4c196c3073b0072 [file] [log] [blame]
# Copyright 2016 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.
from autotest_lib.client.common_lib import utils
def has_hal(hal_library_name, host=None, accept_64bit=True, accept_32bit=True):
"""Detect if the host has the given HAL.
Note that a board can have several HALs, even of a same type. libhardware
picks among them at runtime based on values in system properties. So if
hal_library_name == 'gralloc', we might find that we have both and This function will
not speculate about which will be loaded at runtime.
@param hal_library_name: string name of the hal (e.g. gralloc or camera).
@param host: optional host object representing a remote DUT. If None,
then we'll look for the HAL on localhost.
@param accept_64bit: True iff a 64 bit version of the library suffices.
@param accept_32bit: True iff a 32 bit version of the library suffices.
@return True iff an appropriate library is found on the device.
run = if host is None else
paths = []
if accept_64bit:
if accept_32bit:
for path in paths:
result = run('find %s -name %s.*.so 2>/dev/null' %
(path, hal_library_name), ignore_status=True)
if result.exit_status == 0 and result.stdout.strip():
return True
return False