9908b1e3c8
This reverts commit b3f3e86878.
Reason for revert: This created spam in tombstones.
This is a cherry-pick of dd44378da7a6912ce3b7ae171c70cc4eda53f2d
Bug: 280493417
Merged-In: Ia7b8285a6abd6f89d49859a981be1c9cfa104f81
Change-Id: Ia7b8285a6abd6f89d49859a981be1c9cfa104f81
74 lines
2.8 KiB
C++
74 lines
2.8 KiB
C++
/*
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* Copyright (C) 2021 The Android Open Source Project
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
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* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include "sysprop_helpers.h"
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#include <assert.h>
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#include <stdint.h>
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#include <stdlib.h>
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#include <string.h>
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#include "sys/system_properties.h"
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static bool get_property_value(const char* property_name, char* dest, size_t dest_size) {
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assert(property_name && dest && dest_size != 0);
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const prop_info* prop = __system_property_find(property_name);
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if (!prop) return false;
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struct PropCbCookie {
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char* dest;
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size_t size;
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};
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*dest = '\0';
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PropCbCookie cb_cookie = {dest, dest_size};
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__system_property_read_callback(
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prop,
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[](void* cookie, const char* /* name */, const char* value, uint32_t /* serial */) {
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auto* cb_cookie = reinterpret_cast<PropCbCookie*>(cookie);
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strncpy(cb_cookie->dest, value, cb_cookie->size);
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},
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&cb_cookie);
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return *dest != '\0';
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}
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bool get_config_from_env_or_sysprops(const char* env_var_name, const char* const* sys_prop_names,
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size_t sys_prop_names_size, char* options,
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size_t options_size) {
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const char* env = getenv(env_var_name);
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if (env && *env != '\0') {
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strncpy(options, env, options_size);
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options[options_size - 1] = '\0'; // Ensure null-termination.
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return true;
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}
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for (size_t i = 0; i < sys_prop_names_size; ++i) {
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if (sys_prop_names[i] == nullptr) continue;
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if (get_property_value(sys_prop_names[i], options, options_size)) return true;
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}
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return false;
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}
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