1da177e4c3
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
67 lines
2.0 KiB
C
67 lines
2.0 KiB
C
/*
|
|
* Copyright (c) 2000-2003 Silicon Graphics, Inc. All Rights Reserved.
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify it
|
|
* under the terms of version 2 of the GNU General Public License as
|
|
* published by the Free Software Foundation.
|
|
*
|
|
* This program is distributed in the hope that it would be useful, but
|
|
* WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
|
|
*
|
|
* Further, this software is distributed without any warranty that it is
|
|
* free of the rightful claim of any third person regarding infringement
|
|
* or the like. Any license provided herein, whether implied or
|
|
* otherwise, applies only to this software file. Patent licenses, if
|
|
* any, provided herein do not apply to combinations of this program with
|
|
* other software, or any other product whatsoever.
|
|
*
|
|
* You should have received a copy of the GNU General Public License along
|
|
* with this program; if not, write the Free Software Foundation, Inc., 59
|
|
* Temple Place - Suite 330, Boston MA 02111-1307, USA.
|
|
*
|
|
* Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
|
|
* Mountain View, CA 94043, or:
|
|
*
|
|
* http://www.sgi.com
|
|
*
|
|
* For further information regarding this notice, see:
|
|
*
|
|
* http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/
|
|
*/
|
|
|
|
#include <xfs.h>
|
|
|
|
/* Read from kernel buffer at src to user/kernel buffer defined
|
|
* by the uio structure. Advance the pointer in the uio struct
|
|
* as we go.
|
|
*/
|
|
int
|
|
uio_read(caddr_t src, size_t len, struct uio *uio)
|
|
{
|
|
size_t count;
|
|
|
|
if (!len || !uio->uio_resid)
|
|
return 0;
|
|
|
|
count = uio->uio_iov->iov_len;
|
|
if (!count)
|
|
return 0;
|
|
if (count > len)
|
|
count = len;
|
|
|
|
if (uio->uio_segflg == UIO_USERSPACE) {
|
|
if (copy_to_user(uio->uio_iov->iov_base, src, count))
|
|
return EFAULT;
|
|
} else {
|
|
ASSERT(uio->uio_segflg == UIO_SYSSPACE);
|
|
memcpy(uio->uio_iov->iov_base, src, count);
|
|
}
|
|
|
|
uio->uio_iov->iov_base = (void*)((char*)uio->uio_iov->iov_base + count);
|
|
uio->uio_iov->iov_len -= count;
|
|
uio->uio_offset += count;
|
|
uio->uio_resid -= count;
|
|
return 0;
|
|
}
|