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b168057a | 1 | /* Copyright (C) 2003-2015 Free Software Foundation, Inc. |
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2 | This file is part of the GNU C Library. |
3 | ||
4 | The GNU C Library is free software; you can redistribute it and/or | |
5 | modify it under the terms of the GNU Lesser General Public | |
6 | License as published by the Free Software Foundation; either | |
7 | version 2.1 of the License, or (at your option) any later version. | |
8 | ||
9 | The GNU C Library is distributed in the hope that it will be useful, | |
10 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
12 | Lesser General Public License for more details. | |
13 | ||
14 | You should have received a copy of the GNU Lesser General Public | |
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15 | License along with the GNU C Library; if not, see |
16 | <http://www.gnu.org/licenses/>. */ | |
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17 | |
18 | #include <errno.h> | |
19 | #include <fcntl.h> | |
20 | #include <sysdep.h> | |
21 | ||
22 | /* Advice the system about the expected behaviour of the application with | |
23 | respect to the file associated with FD. */ | |
24 | ||
25 | int | |
26 | posix_fadvise (int fd, off_t offset, off_t len, int advise) | |
27 | { | |
28 | #ifdef __NR_fadvise64 | |
29 | INTERNAL_SYSCALL_DECL (err); | |
30 | int ret = INTERNAL_SYSCALL (fadvise64, err, 6, fd, 0, | |
31 | __LONG_LONG_PAIR (offset >> 31, offset), len, | |
32 | advise); | |
33 | if (INTERNAL_SYSCALL_ERROR_P (ret, err)) | |
34 | return INTERNAL_SYSCALL_ERRNO (ret, err); | |
35 | return 0; | |
36 | #else | |
37 | return ENOSYS; | |
38 | #endif | |
39 | } |