| /* |
| * |
| * Copyright 2018 gRPC authors. |
| * |
| * 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 <grpc/support/port_platform.h> |
| |
| #include "src/core/lib/security/credentials/alts/check_gcp_environment.h" |
| |
| #include <ctype.h> |
| #include <stdio.h> |
| #include <string.h> |
| |
| #include <grpc/support/alloc.h> |
| #include <grpc/support/log.h> |
| |
| const size_t kBiosDataBufferSize = 256; |
| |
| static char* trim(const char* src) { |
| if (src == nullptr) { |
| return nullptr; |
| } |
| char* des = nullptr; |
| size_t start = 0, end = strlen(src) - 1; |
| /* find the last character that is not a whitespace. */ |
| while (end != 0 && isspace(src[end])) { |
| end--; |
| } |
| /* find the first character that is not a whitespace. */ |
| while (start < strlen(src) && isspace(src[start])) { |
| start++; |
| } |
| if (start <= end) { |
| des = static_cast<char*>( |
| gpr_zalloc(sizeof(char) * (end - start + 2 /* '\0' */))); |
| memcpy(des, src + start, end - start + 1); |
| } |
| return des; |
| } |
| |
| namespace grpc_core { |
| namespace internal { |
| |
| char* read_bios_file(const char* bios_file) { |
| FILE* fp = fopen(bios_file, "r"); |
| if (!fp) { |
| gpr_log(GPR_ERROR, "BIOS data file cannot be opened."); |
| return nullptr; |
| } |
| char buf[kBiosDataBufferSize + 1]; |
| size_t ret = fread(buf, sizeof(char), kBiosDataBufferSize, fp); |
| buf[ret] = '\0'; |
| char* trimmed_buf = trim(buf); |
| fclose(fp); |
| return trimmed_buf; |
| } |
| |
| } // namespace internal |
| } // namespace grpc_core |