91 lines
2.7 KiB
C
91 lines
2.7 KiB
C
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/* Copyright (C) 2003, 2004 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, write to the Free
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Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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02111-1307 USA. */
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#include <errno.h>
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#include <fcntl.h>
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#include <sysdep.h>
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#include <kernel-features.h>
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int __posix_fadvise64_l64 (int fd, off64_t offset, off64_t len, int advise);
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int __posix_fadvise64_l32 (int fd, off64_t offset, size_t len, int advise);
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/* Advice the system about the expected behaviour of the application with
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respect to the file associated with FD. */
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struct fadvise64_64_layout
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{
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int fd;
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off64_t offset;
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off64_t len;
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int advise;
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};
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int
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__posix_fadvise64_l64 (int fd, off64_t offset, off64_t len, int advise)
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{
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#ifdef __NR_fadvise64_64
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struct fadvise64_64_layout parameters;
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INTERNAL_SYSCALL_DECL (err);
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parameters.fd = fd;
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parameters.offset = offset;
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parameters.len = len;
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parameters.advise = advise;
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int ret = INTERNAL_SYSCALL (fadvise64_64, err, 1, ¶meters);
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if (!INTERNAL_SYSCALL_ERROR_P (ret, err))
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return 0;
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# ifndef __ASSUME_FADVISE64_64_SYSCALL
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if (INTERNAL_SYSCALL_ERRNO (ret, err) != ENOSYS)
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# endif
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return INTERNAL_SYSCALL_ERRNO (ret, err);
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#endif
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#ifndef __ASSUME_FADVISE64_64_SYSCALL
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# ifdef __NR_fadvise64
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if (len != (off_t) len)
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return EOVERFLOW;
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INTERNAL_SYSCALL_DECL (err2);
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int ret2 = INTERNAL_SYSCALL (fadvise64, err2, 5, fd,
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__LONG_LONG_PAIR ((long) (offset >> 32),
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(long) offset),
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(off_t) len, advise);
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if (!INTERNAL_SYSCALL_ERROR_P (ret2, err2))
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return 0;
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return INTERNAL_SYSCALL_ERRNO (ret2, err2);
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# else
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return ENOSYS;
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# endif
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#endif
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}
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#include <shlib-compat.h>
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#if SHLIB_COMPAT(libc, GLIBC_2_2, GLIBC_2_3_3)
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int
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__posix_fadvise64_l32 (int fd, off64_t offset, size_t len, int advise)
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{
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return __posix_fadvise64_l64 (fd, offset, len, advise);
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}
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versioned_symbol (libc, __posix_fadvise64_l64, posix_fadvise64, GLIBC_2_3_3);
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compat_symbol (libc, __posix_fadvise64_l32, posix_fadvise64, GLIBC_2_2);
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#else
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strong_alias (__posix_fadvise64_l64, posix_fadvise64);
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#endif
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