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1 /* Checking macros for unistd functions.
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145
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2 Copyright (C) 2005-2020 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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