| Jooyung Han | 5c70ff1 | 2023-12-05 14:17:34 +0900 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2023 The Android Open Source Project |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | |
| 17 | #include "KernelConfigs.h" |
| 18 | |
| 19 | #include <android-base/logging.h> |
| 20 | |
| 21 | #include <map> |
| 22 | #include <string> |
| 23 | |
| 24 | #include <zlib.h> |
| 25 | #include "vintf/KernelConfigParser.h" |
| 26 | |
| 27 | #define BUFFER_SIZE sysconf(_SC_PAGESIZE) |
| 28 | |
| 29 | namespace android { |
| 30 | namespace kernelconfigs { |
| 31 | |
| 32 | status_t LoadKernelConfigs(std::map<std::string, std::string>* configs) { |
| 33 | vintf::KernelConfigParser parser; |
| 34 | gzFile f = gzopen("/proc/config.gz", "rb"); |
| 35 | if (f == NULL) { |
| 36 | LOG(ERROR) << "Could not open /proc/config.gz: " << errno; |
| 37 | return -errno; |
| 38 | } |
| 39 | |
| 40 | char buf[BUFFER_SIZE]; |
| 41 | int len; |
| 42 | while ((len = gzread(f, buf, sizeof buf)) > 0) { |
| 43 | parser.process(buf, len); |
| 44 | } |
| 45 | status_t err = OK; |
| 46 | if (len < 0) { |
| 47 | int errnum; |
| 48 | const char* errmsg = gzerror(f, &errnum); |
| 49 | LOG(ERROR) << "Could not read /proc/config.gz: " << errmsg; |
| 50 | err = (errnum == Z_ERRNO ? -errno : errnum); |
| 51 | } |
| 52 | parser.finish(); |
| 53 | gzclose(f); |
| 54 | *configs = std::move(parser.configs()); |
| 55 | return err; |
| 56 | } |
| 57 | |
| 58 | } // namespace kernelconfigs |
| 59 | } // namespace android |
