1997-03-03 18:01:01 +00:00
|
|
|
.\" -*- nroff -*-
|
|
|
|
|
.\"
|
|
|
|
|
.\" Copyright (c) 1996 Doug Rabson
|
|
|
|
|
.\"
|
|
|
|
|
.\" All rights reserved.
|
|
|
|
|
.\"
|
|
|
|
|
.\" This program is free software.
|
|
|
|
|
.\"
|
|
|
|
|
.\" Redistribution and use in source and binary forms, with or without
|
|
|
|
|
.\" modification, are permitted provided that the following conditions
|
|
|
|
|
.\" are met:
|
|
|
|
|
.\" 1. Redistributions of source code must retain the above copyright
|
|
|
|
|
.\" notice, this list of conditions and the following disclaimer.
|
|
|
|
|
.\" 2. Redistributions in binary form must reproduce the above copyright
|
|
|
|
|
.\" notice, this list of conditions and the following disclaimer in the
|
|
|
|
|
.\" documentation and/or other materials provided with the distribution.
|
|
|
|
|
.\"
|
|
|
|
|
.\" THIS SOFTWARE IS PROVIDED BY THE DEVELOPERS ``AS IS'' AND ANY EXPRESS OR
|
|
|
|
|
.\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
|
|
|
|
|
.\" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
|
|
|
|
|
.\" IN NO EVENT SHALL THE DEVELOPERS BE LIABLE FOR ANY DIRECT, INDIRECT,
|
|
|
|
|
.\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
|
|
|
|
|
.\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
|
|
|
|
.\" DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
|
|
|
|
.\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
|
|
|
|
.\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
|
|
|
|
|
.\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
|
|
|
.\"
|
1998-03-12 07:31:21 +00:00
|
|
|
.\" $Id: VOP_READLINK.9,v 1.5 1997/09/29 10:10:55 wosch Exp $
|
1997-03-03 18:01:01 +00:00
|
|
|
.\"
|
|
|
|
|
.Dd July 24, 1996
|
|
|
|
|
.Os
|
|
|
|
|
.Dt VOP_READLINK 9
|
|
|
|
|
.Sh NAME
|
|
|
|
|
.Nm VOP_READLINK
|
|
|
|
|
.Nd read the target of a symbolic link
|
|
|
|
|
.Sh SYNOPSIS
|
1997-04-13 14:49:13 +00:00
|
|
|
.Fd #include <sys/param.h>
|
1997-03-03 18:01:01 +00:00
|
|
|
.Fd #include <sys/vnode.h>
|
|
|
|
|
.Fd #include <sys/uio.h>
|
|
|
|
|
.Ft int
|
|
|
|
|
.Fn VOP_READLINK "struct vnode *vp" "struct uio *uio" "struct ucred *cred"
|
|
|
|
|
.Sh DESCRIPTION
|
|
|
|
|
This reads the target pathname of a symbolic link
|
|
|
|
|
.Bl -tag -width uio
|
|
|
|
|
.It Ar vp
|
|
|
|
|
the vnode of the symlink
|
|
|
|
|
.It Ar uio
|
|
|
|
|
the location of the data to be read or written
|
|
|
|
|
.It Ar cnp
|
|
|
|
|
the credentials of the caller
|
|
|
|
|
.El
|
|
|
|
|
.Sh LOCKS
|
|
|
|
|
The vnode should be locked on entry and will still be locked on exit.
|
|
|
|
|
.Sh RETURN VALUES
|
|
|
|
|
Zero is returned on success, otherwise an error code is returned.
|
|
|
|
|
.Sh PSEUDOCODE
|
|
|
|
|
.Bd -literal
|
|
|
|
|
int
|
|
|
|
|
vop_readlink(struct vnode *vp, struct uio *uio, struct ucred *cred)
|
|
|
|
|
{
|
|
|
|
|
int error = 0;
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* Read the target of the symlink.
|
|
|
|
|
*/
|
|
|
|
|
...;
|
|
|
|
|
|
|
|
|
|
return error;
|
|
|
|
|
}
|
|
|
|
|
.Ed
|
|
|
|
|
.Sh ERRORS
|
1997-03-07 03:32:31 +00:00
|
|
|
.Bl -tag -width Er
|
1997-03-03 18:01:01 +00:00
|
|
|
.It Bq Er EIO
|
|
|
|
|
a read error occurred while reading the contents of the symlink
|
|
|
|
|
.El
|
|
|
|
|
.Sh SEE ALSO
|
1997-09-29 10:11:02 +00:00
|
|
|
.Xr uiomove 9 ,
|
|
|
|
|
.Xr vnode 9
|
1997-03-03 18:01:01 +00:00
|
|
|
.Sh AUTHORS
|
1998-03-12 07:31:21 +00:00
|
|
|
This man page was written by
|
|
|
|
|
.An Doug Rabson .
|
