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58 lines
1.7 KiB
C
58 lines
1.7 KiB
C
/* Copyright (C) 2007-2013 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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#include <fcntl.h>
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#include <kernel-features.h>
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#include <sysdep.h>
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#define posix_fallocate static internal_fallocate
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#include <sysdeps/posix/posix_fallocate.c>
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#undef posix_fallocate
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#if !defined __ASSUME_FALLOCATE && defined __NR_fallocate
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int __have_fallocate attribute_hidden;
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#endif
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extern int __call_fallocate (int fd, int mode, __off64_t offset, __off64_t len)
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attribute_hidden;
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/* Reserve storage for the data of the file associated with FD. */
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int
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posix_fallocate (int fd, __off_t offset, __off_t len)
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{
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#ifdef __NR_fallocate
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# ifndef __ASSUME_FALLOCATE
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if (__builtin_expect (__have_fallocate >= 0, 1))
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# endif
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{
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int res = __call_fallocate (fd, 0, offset, len);
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if (! res)
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return 0;
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# ifndef __ASSUME_FALLOCATE
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if (__builtin_expect (res == ENOSYS, 0))
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__have_fallocate = -1;
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else
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# endif
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if (res != EOPNOTSUPP)
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return res;
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}
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#endif
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return internal_fallocate (fd, offset, len);
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}
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