uclibc-ng/libc/sysdeps/linux/common/sync_file_range.c

/* vi: set sw=4 ts=4: */
/*
 * sync_file_range() for uClibc
 *
 * Copyright (C) 2008 Bernhard Reutner-Fischer <uclibc@uclibc.org>
 *
 * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
 */

#include <sys/syscall.h>
#if defined __USE_GNU
#include <fcntl.h>

#if defined __NR_sync_file_range && defined __UCLIBC_HAS_LFS__
#define __NR___syscall_sync_file_range __NR_sync_file_range
static __inline__ _syscall6(int, __syscall_sync_file_range, int, fd,
		off_t, offset_hi, off_t, offset_lo,
		off_t, nbytes_hi, off_t, nbytes_lo, unsigned int, flags)
int sync_file_range(int fd, off64_t offset, off64_t nbytes, unsigned int flags)
{
	return __syscall_sync_file_range(fd,
		__LONG_LONG_PAIR((long)(offset >> 32), (long)(offset & 0xffffffff)),
		__LONG_LONG_PAIR((long)(nbytes >> 32), (long)(nbytes & 0xffffffff)),
		flags);
}
#elif defined __UCLIBC_HAS_STUBS__
int sync_file_range(int fd, __off64_t offset, __off64_t nbytes, unsigned int flags)
{
	__set_errno(ENOSYS);
	return -1;
}
#endif
#endif