| /* |
| * Copyright (C) 2023 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 "KernelConfigs.h" |
| |
| #include <android-base/logging.h> |
| |
| #include <map> |
| #include <string> |
| |
| #include <zlib.h> |
| #include "vintf/KernelConfigParser.h" |
| |
| #define BUFFER_SIZE sysconf(_SC_PAGESIZE) |
| |
| namespace android { |
| namespace kernelconfigs { |
| |
| status_t LoadKernelConfigs(std::map<std::string, std::string>* configs) { |
| vintf::KernelConfigParser parser; |
| gzFile f = gzopen("/proc/config.gz", "rb"); |
| if (f == NULL) { |
| LOG(ERROR) << "Could not open /proc/config.gz: " << errno; |
| return -errno; |
| } |
| |
| char buf[BUFFER_SIZE]; |
| int len; |
| while ((len = gzread(f, buf, sizeof buf)) > 0) { |
| parser.process(buf, len); |
| } |
| status_t err = OK; |
| if (len < 0) { |
| int errnum; |
| const char* errmsg = gzerror(f, &errnum); |
| LOG(ERROR) << "Could not read /proc/config.gz: " << errmsg; |
| err = (errnum == Z_ERRNO ? -errno : errnum); |
| } |
| parser.finish(); |
| gzclose(f); |
| *configs = std::move(parser.configs()); |
| return err; |
| } |
| |
| } // namespace kernelconfigs |
| } // namespace android |