1/* Copyright (c) 2013 The Chromium Authors. All rights reserved.
2 * Use of this source code is governed by a BSD-style license that can be
3 * found in the LICENSE file. */
4
5#ifndef _GNU_SOURCE
6#define _GNU_SOURCE
7#endif
8#include <stdio.h>
9#include <sys/types.h>
10#include <unistd.h>
11
12#if defined(__native_client__) && defined(__GLIBC__)
13
14static ssize_t fdopen_read(void *cookie, char *buf, size_t size) {
15  return read((int) cookie, buf, size);
16}
17
18static ssize_t fdopen_write(void *cookie, const char *buf, size_t size) {
19  return write((int) cookie, buf, size);
20}
21
22static int fdopen_seek(void *cookie, off_t *offset, int whence) {
23  off_t ret = lseek((int) cookie, *offset, whence);
24  if (ret < 0) {
25    return -1;
26  }
27  *offset = ret;
28  return 0;
29}
30
31static int fdopen_close(void *cookie) {
32  return close((int) cookie);
33}
34
35static cookie_io_functions_t fdopen_functions = {
36  fdopen_read,
37  fdopen_write,
38  fdopen_seek,
39  fdopen_close,
40};
41
42/*
43 * TODO(bradnelson): Remove this glibc is fixed.
44 * See: https://code.google.com/p/nativeclient/issues/detail?id=3362
45 * Workaround fdopen in glibc failing due to it vetting the provided file
46 * handles with fcntl which is not currently interceptable.
47 */
48FILE *fdopen(int fildes, const char *mode) {
49  return fopencookie((void *) fildes, mode, fdopen_functions);
50}
51
52#endif  /* defined(__native_client__) && defined(__GLIBC__) */
53