1 /* Copyright (C) 2007-2015 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
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.
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.
14 You should have received a copy of the GNU Lesser General Public
15 License along with the GNU C Library; if not, see
16 <http://www.gnu.org/licenses/>. */
19 #include <kernel-features.h>
22 #define posix_fallocate static internal_fallocate
23 #include <sysdeps/posix/posix_fallocate.c>
24 #undef posix_fallocate
26 #if !defined __ASSUME_FALLOCATE && defined __NR_fallocate
27 int __have_fallocate attribute_hidden
;
30 extern int __call_fallocate (int fd
, int mode
, __off64_t offset
, __off64_t len
)
33 /* Reserve storage for the data of the file associated with FD. */
35 posix_fallocate (int fd
, __off_t offset
, __off_t len
)
38 # ifndef __ASSUME_FALLOCATE
39 if (__glibc_likely (__have_fallocate
>= 0))
42 int res
= __call_fallocate (fd
, 0, offset
, len
);
46 # ifndef __ASSUME_FALLOCATE
47 if (__glibc_unlikely (res
== ENOSYS
))
48 __have_fallocate
= -1;
51 if (res
!= EOPNOTSUPP
)
56 return internal_fallocate (fd
, offset
, len
);