1169695Skan/* Checking macros for unistd functions.
2169695Skan   Copyright (C) 2005 Free Software Foundation, Inc.
3169695Skan
4169695SkanThis file is part of GCC.
5169695Skan
6169695SkanGCC is free software; you can redistribute it and/or modify it under
7169695Skanthe terms of the GNU General Public License as published by the Free
8169695SkanSoftware Foundation; either version 2, or (at your option) any later
9169695Skanversion.
10169695Skan
11169695SkanIn addition to the permissions in the GNU General Public License, the
12169695SkanFree Software Foundation gives you unlimited permission to link the
13169695Skancompiled version of this file into combinations with other programs,
14169695Skanand to distribute those combinations without any restriction coming
15169695Skanfrom the use of this file.  (The General Public License restrictions
16169695Skando apply in other respects; for example, they cover modification of
17169695Skanthe file, and distribution when not linked into a combine
18169695Skanexecutable.)
19169695Skan
20169695SkanGCC is distributed in the hope that it will be useful, but WITHOUT ANY
21169695SkanWARRANTY; without even the implied warranty of MERCHANTABILITY or
22169695SkanFITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
23169695Skanfor more details.
24169695Skan
25169695SkanYou should have received a copy of the GNU General Public License
26169695Skanalong with GCC; see the file COPYING.  If not, write to the Free
27169695SkanSoftware Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
28169695Skan02110-1301, USA.  */
29169695Skan
30169695Skan/* As a special exception, if you link this library with files compiled with
31169695Skan   GCC to produce an executable, this does not cause the resulting executable
32169695Skan   to be covered by the GNU General Public License. This exception does not
33169695Skan   however invalidate any other reasons why the executable file might be
34169695Skan   covered by the GNU General Public License.  */
35169695Skan
36169695Skan#ifndef _SSP_UNISTD_H
37169695Skan#define _SSP_UNISTD_H 1
38169695Skan
39169695Skan#include <ssp.h>
40169695Skan#include_next <unistd.h>
41169695Skan
42169695Skan#if __SSP_FORTIFY_LEVEL > 0
43169695Skan
44169695Skan#undef read
45169695Skan#undef readlink
46169695Skan#undef getcwd
47169695Skan
48169695Skanextern ssize_t __SSP_REDIRECT (__read_alias, (int __fd, void *__buf,
49169695Skan					      size_t __nbytes), read);
50169695Skan
51169695Skanextern inline __attribute__((__always_inline__)) ssize_t
52169695Skanread (int __fd, void *__buf, size_t __nbytes)
53169695Skan{
54169695Skan  if (__ssp_bos0 (__buf) != (size_t) -1 && __nbytes > __ssp_bos0 (__buf))
55169695Skan    __chk_fail ();
56169695Skan  return __read_alias (__fd, __buf, __nbytes);
57169695Skan}
58169695Skan
59169695Skanextern int __SSP_REDIRECT (__readlink_alias,
60169695Skan			   (const char *__restrict__ __path,
61169695Skan			    char *__restrict__ __buf, size_t __len),
62169695Skan			   readlink);
63169695Skan
64169695Skanextern inline __attribute__((__always_inline__)) int
65169695Skanreadlink (const char *__restrict__ __path, char *__restrict__ __buf,
66169695Skan	  size_t __len)
67169695Skan{
68169695Skan  if (__ssp_bos (__buf) != (size_t) -1 && __len > __ssp_bos (__buf))
69169695Skan    __chk_fail ();
70169695Skan  return __readlink_alias (__path, __buf, __len);
71169695Skan}
72169695Skan
73169695Skanextern char *__SSP_REDIRECT (__getcwd_alias,
74169695Skan			     (char *__buf, size_t __size), getcwd);
75169695Skan
76169695Skanextern inline __attribute__((__always_inline__)) char *
77169695Skangetcwd (char *__buf, size_t __size)
78169695Skan{
79169695Skan  if (__ssp_bos (__buf) != (size_t) -1 && __size > __ssp_bos (__buf))
80169695Skan    __chk_fail ();
81169695Skan  return __getcwd_alias (__buf, __size);
82169695Skan}
83169695Skan
84169695Skan#endif /* __SSP_FORTIFY_LEVEL > 0 */
85169695Skan#endif /* _SSP_UNISTD_H */
86