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/*
* Copyright (C) 2006 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <cutils/properties.h>
#include <errno.h>
#include <inttypes.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <android-base/properties.h>
int8_t property_get_bool(const char* key, int8_t default_value) {
if (!key) return default_value;
int8_t result = default_value;
char buf[PROPERTY_VALUE_MAX] = {};
int len = property_get(key, buf, "");
if (len == 1) {
char ch = buf[0];
if (ch == '0' || ch == 'n') {
result = false;
} else if (ch == '1' || ch == 'y') {
result = true;
}
} else if (len > 1) {
if (!strcmp(buf, "no") || !strcmp(buf, "false") || !strcmp(buf, "off")) {
result = false;
} else if (!strcmp(buf, "yes") || !strcmp(buf, "true") || !strcmp(buf, "on")) {
result = true;
}
}
return result;
}
template <typename T>
static T property_get_int(const char* key, T default_value) {
if (!key) return default_value;
char value[PROPERTY_VALUE_MAX] = {};
if (property_get(key, value, "") < 1) return default_value;
// libcutils unwisely allows octal, which libbase doesn't.
T result = default_value;
int saved_errno = errno;
errno = 0;
char* end = nullptr;
intmax_t v = strtoimax(value, &end, 0);
if (errno != ERANGE && end != value && v >= std::numeric_limits<T>::min() &&
v <= std::numeric_limits<T>::max()) {
result = v;
}
errno = saved_errno;
return result;
}
int64_t property_get_int64(const char* key, int64_t default_value) {
return property_get_int<int64_t>(key, default_value);
}
int32_t property_get_int32(const char* key, int32_t default_value) {
return property_get_int<int32_t>(key, default_value);
}
int property_set(const char* key, const char* value) {
return __system_property_set(key, value);
}
int property_get(const char* key, char* value, const char* default_value) {
int len = __system_property_get(key, value);
if (len < 1 && default_value) {
snprintf(value, PROPERTY_VALUE_MAX, "%s", default_value);
return strlen(value);
}
return len;
}
#if __has_include(<sys/system_properties.h>)
#define _REALLY_INCLUDE_SYS__SYSTEM_PROPERTIES_H_
#include <sys/_system_properties.h>
struct callback_data {
void (*callback)(const char* name, const char* value, void* cookie);
void* cookie;
};
static void trampoline(void* raw_data, const char* name, const char* value, unsigned /*serial*/) {
callback_data* data = reinterpret_cast<callback_data*>(raw_data);
data->callback(name, value, data->cookie);
}
static void property_list_callback(const prop_info* pi, void* data) {
__system_property_read_callback(pi, trampoline, data);
}
int property_list(void (*fn)(const char* name, const char* value, void* cookie), void* cookie) {
callback_data data = {fn, cookie};
return __system_property_foreach(property_list_callback, &data);
}
#endif
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