| /* |
| * |
| * Copyright 2015, Google Inc. |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions are |
| * met: |
| * |
| * * Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * * Redistributions in binary form must reproduce the above |
| * copyright notice, this list of conditions and the following disclaimer |
| * in the documentation and/or other materials provided with the |
| * distribution. |
| * * Neither the name of Google Inc. nor the names of its |
| * contributors may be used to endorse or promote products derived from |
| * this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| * |
| */ |
| |
| #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/support/block_annotate.h" |
| #include "src/core/lib/support/string.h" |
| |
| grpc_error *grpc_load_file(const char *filename, int add_null_terminator, |
| grpc_slice *output) { |
| unsigned char *contents = NULL; |
| 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 == NULL) { |
| 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 = (size_t)ftell(file); |
| fseek(file, 0, SEEK_SET); |
| contents = 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 != NULL) 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; |
| return error; |
| } |