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/* sendfile -- copy data directly from one file descriptor to another
Copyright (C) 2002 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
#include <sys/sendfile.h>
#include <errno.h>
#include <stddef.h>
/* Send COUNT bytes from file associated with IN_FD starting at OFFSET to
descriptor OUT_FD. */
ssize_t
sendfile64 (int out_fd, int in_fd, off64_t *offset, size_t count)
{
if (offset == NULL)
return sendfile (out_fd, in_fd, NULL, count);
else
{
off_t ofs = *offset;
if (ofs != *offset)
{
__set_errno (EOVERFLOW);
return -1;
}
ssize_t ret = sendfile (out_fd, in_fd, &ofs, count);
*offset = ofs;
return ret;
}
}
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