| 1 | /* Checking macros for unistd functions.
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| 2 | Copyright (C) 2005-2021 Free Software Foundation, Inc.
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| 3 |
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| 4 | This file is part of GCC.
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| 5 |
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| 6 | GCC is free software; you can redistribute it and/or modify it under
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| 7 | the terms of the GNU General Public License as published by the Free
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| 8 | Software Foundation; either version 3, or (at your option) any later
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| 9 | version.
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| 10 |
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| 11 | In addition to the permissions in the GNU General Public License, the
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| 12 | Free Software Foundation gives you unlimited permission to link the
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| 13 | compiled version of this file into combinations with other programs,
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| 14 | and to distribute those combinations without any restriction coming
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| 15 | from the use of this file. (The General Public License restrictions
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| 16 | do apply in other respects; for example, they cover modification of
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| 17 | the file, and distribution when not linked into a combine
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| 18 | executable.)
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| 19 |
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| 20 | GCC is distributed in the hope that it will be useful, but WITHOUT ANY
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| 21 | WARRANTY; without even the implied warranty of MERCHANTABILITY or
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| 22 | FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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| 23 | for more details.
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| 24 |
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| 25 | Under Section 7 of GPL version 3, you are granted additional
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| 26 | permissions described in the GCC Runtime Library Exception, version
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| 27 | 3.1, as published by the Free Software Foundation.
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| 28 |
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| 29 | You should have received a copy of the GNU General Public License and
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| 30 | a copy of the GCC Runtime Library Exception along with this program;
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| 31 | see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
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| 32 | <http://www.gnu.org/licenses/>. */
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| 33 |
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| 34 |
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| 35 | #ifndef _SSP_UNISTD_H
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| 36 | #define _SSP_UNISTD_H 1
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| 37 |
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| 38 | #include <ssp.h>
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| 39 | #include_next <unistd.h>
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| 40 |
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| 41 | #if __SSP_FORTIFY_LEVEL > 0
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| 42 |
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| 43 | #undef read
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| 44 | #undef readlink
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| 45 | #undef getcwd
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| 46 |
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| 47 | extern ssize_t __SSP_REDIRECT (__read_alias, (int __fd, void *__buf,
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| 48 | size_t __nbytes), read);
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| 49 |
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| 50 | extern inline __attribute__((__always_inline__)) ssize_t
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| 51 | read (int __fd, void *__buf, size_t __nbytes)
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| 52 | {
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| 53 | if (__ssp_bos0 (__buf) != (size_t) -1 && __nbytes > __ssp_bos0 (__buf))
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| 54 | __chk_fail ();
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| 55 | return __read_alias (__fd, __buf, __nbytes);
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| 56 | }
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| 57 |
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| 58 | extern int __SSP_REDIRECT (__readlink_alias,
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| 59 | (const char *__restrict__ __path,
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| 60 | char *__restrict__ __buf, size_t __len),
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| 61 | readlink);
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| 62 |
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| 63 | extern inline __attribute__((__always_inline__)) int
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| 64 | readlink (const char *__restrict__ __path, char *__restrict__ __buf,
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| 65 | size_t __len)
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| 66 | {
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| 67 | if (__ssp_bos (__buf) != (size_t) -1 && __len > __ssp_bos (__buf))
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| 68 | __chk_fail ();
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| 69 | return __readlink_alias (__path, __buf, __len);
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| 70 | }
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| 71 |
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| 72 | extern char *__SSP_REDIRECT (__getcwd_alias,
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| 73 | (char *__buf, size_t __size), getcwd);
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| 74 |
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| 75 | extern inline __attribute__((__always_inline__)) char *
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| 76 | getcwd (char *__buf, size_t __size)
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| 77 | {
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| 78 | if (__ssp_bos (__buf) != (size_t) -1 && __size > __ssp_bos (__buf))
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| 79 | __chk_fail ();
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| 80 | return __getcwd_alias (__buf, __size);
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| 81 | }
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| 82 |
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| 83 | #endif /* __SSP_FORTIFY_LEVEL > 0 */
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| 84 | #endif /* _SSP_UNISTD_H */
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