1/* Checking macros for unistd functions.
2   Copyright (C) 2005 Free Software Foundation, Inc.
3
4This file is part of GCC.
5
6GCC is free software; you can redistribute it and/or modify it under
7the terms of the GNU General Public License as published by the Free
8Software Foundation; either version 2, or (at your option) any later
9version.
10
11In addition to the permissions in the GNU General Public License, the
12Free Software Foundation gives you unlimited permission to link the
13compiled version of this file into combinations with other programs,
14and to distribute those combinations without any restriction coming
15from the use of this file.  (The General Public License restrictions
16do apply in other respects; for example, they cover modification of
17the file, and distribution when not linked into a combine
18executable.)
19
20GCC is distributed in the hope that it will be useful, but WITHOUT ANY
21WARRANTY; without even the implied warranty of MERCHANTABILITY or
22FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
23for more details.
24
25You should have received a copy of the GNU General Public License
26along with GCC; see the file COPYING.  If not, write to the Free
27Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
2802110-1301, USA.  */
29
30/* As a special exception, if you link this library with files compiled with
31   GCC to produce an executable, this does not cause the resulting executable
32   to be covered by the GNU General Public License. This exception does not
33   however invalidate any other reasons why the executable file might be
34   covered by the GNU General Public License.  */
35
36#ifndef _SSP_UNISTD_H
37#define _SSP_UNISTD_H 1
38
39#include <ssp.h>
40#include_next <unistd.h>
41
42#if __SSP_FORTIFY_LEVEL > 0
43
44#undef read
45#undef readlink
46#undef getcwd
47
48extern ssize_t __SSP_REDIRECT (__read_alias, (int __fd, void *__buf,
49					      size_t __nbytes), read);
50
51extern inline __attribute__((__always_inline__)) ssize_t
52read (int __fd, void *__buf, size_t __nbytes)
53{
54  if (__ssp_bos0 (__buf) != (size_t) -1 && __nbytes > __ssp_bos0 (__buf))
55    __chk_fail ();
56  return __read_alias (__fd, __buf, __nbytes);
57}
58
59extern int __SSP_REDIRECT (__readlink_alias,
60			   (const char *__restrict__ __path,
61			    char *__restrict__ __buf, size_t __len),
62			   readlink);
63
64extern inline __attribute__((__always_inline__)) int
65readlink (const char *__restrict__ __path, char *__restrict__ __buf,
66	  size_t __len)
67{
68  if (__ssp_bos (__buf) != (size_t) -1 && __len > __ssp_bos (__buf))
69    __chk_fail ();
70  return __readlink_alias (__path, __buf, __len);
71}
72
73extern char *__SSP_REDIRECT (__getcwd_alias,
74			     (char *__buf, size_t __size), getcwd);
75
76extern inline __attribute__((__always_inline__)) char *
77getcwd (char *__buf, size_t __size)
78{
79  if (__ssp_bos (__buf) != (size_t) -1 && __size > __ssp_bos (__buf))
80    __chk_fail ();
81  return __getcwd_alias (__buf, __size);
82}
83
84#endif /* __SSP_FORTIFY_LEVEL > 0 */
85#endif /* _SSP_UNISTD_H */
86