1 /* Copyright (C) 2007-2014 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
;
31 /* Reserve storage for the data of the file associated with FD. */
33 posix_fallocate (int fd
, __off_t offset
, __off_t len
)
36 # ifndef __ASSUME_FALLOCATE
37 if (__glibc_likely (__have_fallocate
>= 0))
40 INTERNAL_SYSCALL_DECL (err
);
41 int res
= INTERNAL_SYSCALL (fallocate
, err
, 6, fd
, 0,
42 __LONG_LONG_PAIR (offset
>> 31, offset
),
43 __LONG_LONG_PAIR (len
>> 31, len
));
45 if (! INTERNAL_SYSCALL_ERROR_P (res
, err
))
48 # ifndef __ASSUME_FALLOCATE
49 if (__glibc_unlikely (INTERNAL_SYSCALL_ERRNO (res
, err
) == ENOSYS
))
50 __have_fallocate
= -1;
53 if (INTERNAL_SYSCALL_ERRNO (res
, err
) != EOPNOTSUPP
)
54 return INTERNAL_SYSCALL_ERRNO (res
, err
);
58 return internal_fallocate (fd
, offset
, len
);