| /* |
| * |
| * Copyright 2015 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/iomgr/load_file.h" |
| |
| #include <errno.h> |
| #include <string.h> |
| |
| #include <grpc/support/alloc.h> |
| #include <grpc/support/log.h> |
| #include <grpc/support/string_util.h> |
| |
| #include "src/core/lib/gpr/string.h" |
| #include "src/core/lib/iomgr/block_annotate.h" |
| |
| grpc_error* grpc_load_file(const char* filename, int add_null_terminator, |
| grpc_slice* output) { |
| unsigned char* contents = nullptr; |
| size_t contents_size = 0; |
| grpc_slice result = grpc_empty_slice(); |
| FILE* file; |
| size_t bytes_read = 0; |
| grpc_error* error = GRPC_ERROR_NONE; |
| |
| GRPC_SCHEDULING_START_BLOCKING_REGION; |
| file = fopen(filename, "rb"); |
| if (file == nullptr) { |
| error = GRPC_OS_ERROR(errno, "fopen"); |
| goto end; |
| } |
| fseek(file, 0, SEEK_END); |
| /* Converting to size_t on the assumption that it will not fail */ |
| contents_size = static_cast<size_t>(ftell(file)); |
| fseek(file, 0, SEEK_SET); |
| contents = static_cast<unsigned char*>( |
| gpr_malloc(contents_size + (add_null_terminator ? 1 : 0))); |
| bytes_read = fread(contents, 1, contents_size, file); |
| if (bytes_read < contents_size) { |
| error = GRPC_OS_ERROR(errno, "fread"); |
| GPR_ASSERT(ferror(file)); |
| goto end; |
| } |
| if (add_null_terminator) { |
| contents[contents_size++] = 0; |
| } |
| result = grpc_slice_new(contents, contents_size, gpr_free); |
| |
| end: |
| *output = result; |
| if (file != nullptr) fclose(file); |
| if (error != GRPC_ERROR_NONE) { |
| grpc_error* error_out = |
| grpc_error_set_str(GRPC_ERROR_CREATE_REFERENCING_FROM_STATIC_STRING( |
| "Failed to load file", &error, 1), |
| GRPC_ERROR_STR_FILENAME, |
| grpc_slice_from_copied_string( |
| filename)); // TODO(ncteisen), always static? |
| GRPC_ERROR_UNREF(error); |
| error = error_out; |
| } |
| GRPC_SCHEDULING_END_BLOCKING_REGION_NO_EXEC_CTX; |
| return error; |
| } |