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151 lines
5.0 KiB
151 lines
5.0 KiB
/* |
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* Copyright (C) 2006 The Android Open Source Project |
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* |
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* Licensed under the Apache License, Version 2.0 (the "License"); |
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* you may not use this file except in compliance with the License. |
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* You may obtain a copy of the License at |
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* |
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* http://www.apache.org/licenses/LICENSE-2.0 |
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* |
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* Unless required by applicable law or agreed to in writing, software |
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* distributed under the License is distributed on an "AS IS" BASIS, |
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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* See the License for the specific language governing permissions and |
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* limitations under the License. |
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*/ |
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#pragma once |
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#include <sys/cdefs.h> |
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#include <stddef.h> |
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#include <stdint.h> |
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#if __has_include(<sys/system_properties.h>) |
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#include <sys/system_properties.h> |
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#else |
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#define PROP_VALUE_MAX 92 |
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#endif |
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#ifdef __cplusplus |
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extern "C" { |
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#endif |
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// |
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// Deprecated. |
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// |
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// See <android-base/properties.h> for better API. |
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// |
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#define PROPERTY_KEY_MAX PROP_NAME_MAX |
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#define PROPERTY_VALUE_MAX PROP_VALUE_MAX |
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/* property_get: returns the length of the value which will never be |
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** greater than PROPERTY_VALUE_MAX - 1 and will always be zero terminated. |
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** (the length does not include the terminating zero). |
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** |
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** If the property read fails or returns an empty value, the default |
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** value is used (if nonnull). |
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*/ |
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int property_get(const char* key, char* value, const char* default_value); |
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/* property_get_bool: returns the value of key coerced into a |
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** boolean. If the property is not set, then the default value is returned. |
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** |
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* The following is considered to be true (1): |
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** "1", "true", "y", "yes", "on" |
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** |
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** The following is considered to be false (0): |
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** "0", "false", "n", "no", "off" |
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** |
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** The conversion is whitespace-sensitive (e.g. " off" will not be false). |
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** |
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** If no property with this key is set (or the key is NULL) or the boolean |
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** conversion fails, the default value is returned. |
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**/ |
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int8_t property_get_bool(const char *key, int8_t default_value); |
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/* property_get_int64: returns the value of key truncated and coerced into a |
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** int64_t. If the property is not set, then the default value is used. |
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** |
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** The numeric conversion is identical to strtoimax with the base inferred: |
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** - All digits up to the first non-digit characters are read |
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** - The longest consecutive prefix of digits is converted to a long |
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** |
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** Valid strings of digits are: |
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** - An optional sign character + or - |
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** - An optional prefix indicating the base (otherwise base 10 is assumed) |
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** -- 0 prefix is octal |
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** -- 0x / 0X prefix is hex |
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** |
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** Leading/trailing whitespace is ignored. Overflow/underflow will cause |
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** numeric conversion to fail. |
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** |
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** If no property with this key is set (or the key is NULL) or the numeric |
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** conversion fails, the default value is returned. |
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**/ |
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int64_t property_get_int64(const char *key, int64_t default_value); |
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/* property_get_int32: returns the value of key truncated and coerced into an |
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** int32_t. If the property is not set, then the default value is used. |
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** |
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** The numeric conversion is identical to strtoimax with the base inferred: |
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** - All digits up to the first non-digit characters are read |
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** - The longest consecutive prefix of digits is converted to a long |
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** |
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** Valid strings of digits are: |
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** - An optional sign character + or - |
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** - An optional prefix indicating the base (otherwise base 10 is assumed) |
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** -- 0 prefix is octal |
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** -- 0x / 0X prefix is hex |
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** |
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** Leading/trailing whitespace is ignored. Overflow/underflow will cause |
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** numeric conversion to fail. |
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** |
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** If no property with this key is set (or the key is NULL) or the numeric |
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** conversion fails, the default value is returned. |
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**/ |
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int32_t property_get_int32(const char *key, int32_t default_value); |
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/* property_set: returns 0 on success, < 0 on failure |
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*/ |
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int property_set(const char *key, const char *value); |
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int property_list(void (*propfn)(const char *key, const char *value, void *cookie), void *cookie); |
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#if defined(__BIONIC_FORTIFY) |
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#define __property_get_err_str "property_get() called with too small of a buffer" |
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#if defined(__clang__) |
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/* Some projects use -Weverything; diagnose_if is clang-specific. */ |
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#pragma clang diagnostic push |
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#pragma clang diagnostic ignored "-Wgcc-compat" |
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int property_get(const char* key, char* value, const char* default_value) |
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__clang_error_if(__bos(value) != __BIONIC_FORTIFY_UNKNOWN_SIZE && |
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__bos(value) < PROPERTY_VALUE_MAX, |
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__property_get_err_str); |
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#pragma clang diagnostic pop |
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#else /* defined(__clang__) */ |
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extern int __property_get_real(const char *, char *, const char *) |
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__asm__(__USER_LABEL_PREFIX__ "property_get"); |
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__errordecl(__property_get_too_small_error, __property_get_err_str); |
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__BIONIC_FORTIFY_INLINE |
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int property_get(const char *key, char *value, const char *default_value) { |
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size_t bos = __bos(value); |
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if (bos < PROPERTY_VALUE_MAX) { |
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__property_get_too_small_error(); |
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} |
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return __property_get_real(key, value, default_value); |
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} |
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#endif /* defined(__clang__) */ |
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#undef __property_get_err_str |
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#endif /* defined(__BIONIC_FORTIFY) */ |
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#ifdef __cplusplus |
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} |
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#endif
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