freebsd-nq/share/man/man9/VOP_REMOVE.9

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.\" Copyright (c) 1996 Doug Rabson
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.Dd July 24, 1996
.Os
.Dt VOP_REMOVE 9
.Sh NAME
.Nm VOP_REMOVE ,
.Nm VOP_RMDIR
.Nd remove a file or directory
.Sh SYNOPSIS
.In sys/param.h
.In sys/vnode.h
.Ft int
.Fn VOP_REMOVE "struct vnode *dvp" "struct vnode *vp" "struct componentname *cnp"
.Ft int
.Fn VOP_RMDIR "struct vnode *dvp" "struct vnode *vp" "struct componentname *cnp"
.Sh DESCRIPTION
These entry points remove files and directories respectively.
.Pp
The arguments are:
.Bl -tag -width dvp
.It Ar dvp
the vnode of the directory
.It Ar vp
the vnode of the file to be removed
.It Ar cnp
pathname information about the file
.El
.Sh LOCKS
Both
.Fa dvp
and
.Fa vp
should be locked on entry and remain locked on return.
.Sh RETURN VALUES
Zero is returned on success, otherwise an error code is returned.
.Sh PSEUDOCODE
.Bd -literal
int
vop_remove(struct vnode *dvp, struct vnode *vp, struct componentname *cnp)
{
    int error = 0;

    if (vp is immutable) {
	error = EPERM;
	goto out;
    }

    /*
     * Remove name cnp->cn_nameptr from directory and update link count
     * of vp.
     */
    ...;

    /*
     * Careful about trying to remove ".".  XXX this should be handled
     * higher up.
     */
    if (dvp == vp)
	vrele(vp);
    else
	vput(vp);
    vput(dvp);

    return error;
}
.Ed
.Sh ERRORS
.Bl -tag -width Er
.It Bq Er EPERM
the file is immutable
.It Bq Er ENOTEMPTY
attempt to remove a directory which is not empty
.El
.Sh SEE ALSO
.Xr vnode 9 ,
.Xr VOP_LOOKUP 9
.Sh AUTHORS
This man page was written by
.An Doug Rabson .