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1 | /* Checking macros for unistd functions. |
2 | Copyright (C) 2005 Free Software Foundation, Inc. | |
3 | ||
4 | This file is part of GCC. | |
5 | ||
6 | GCC is free software; you can redistribute it and/or modify it under | |
7 | the terms of the GNU General Public License as published by the Free | |
8 | Software Foundation; either version 2, or (at your option) any later | |
9 | version. | |
10 | ||
11 | In addition to the permissions in the GNU General Public License, the | |
12 | Free Software Foundation gives you unlimited permission to link the | |
13 | compiled version of this file into combinations with other programs, | |
14 | and to distribute those combinations without any restriction coming | |
15 | from the use of this file. (The General Public License restrictions | |
16 | do apply in other respects; for example, they cover modification of | |
17 | the file, and distribution when not linked into a combine | |
18 | executable.) | |
19 | ||
20 | GCC is distributed in the hope that it will be useful, but WITHOUT ANY | |
21 | WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
22 | FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
23 | for more details. | |
24 | ||
25 | You should have received a copy of the GNU General Public License | |
26 | along with GCC; see the file COPYING. If not, write to the Free | |
27 | Software Foundation, 59 Temple Place - Suite 330, Boston, MA | |
28 | 02111-1307, 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 | ||
48 | extern ssize_t __SSP_REDIRECT (__read_alias, (int __fd, void *__buf, | |
49 | size_t __nbytes), read); | |
50 | ||
51 | extern inline __attribute__((__always_inline__)) ssize_t | |
52 | read (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 | ||
59 | extern int __SSP_REDIRECT (__readlink_alias, | |
60 | (const char *__restrict__ __path, | |
61 | char *__restrict__ __buf, size_t __len), | |
62 | readlink); | |
63 | ||
64 | extern inline __attribute__((__always_inline__)) int | |
65 | readlink (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 | ||
73 | extern char *__SSP_REDIRECT (__getcwd_alias, | |
74 | (char *__buf, size_t __size), getcwd); | |
75 | ||
76 | extern inline __attribute__((__always_inline__)) char * | |
77 | getcwd (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 */ |