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/* libdiskfs implementetation of fs.defs: file_chown
   Copyright (C) 1994 Free Software Foundation

   This program is free software; you can redistribute it and/or
   modify it under the terms of the GNU General Public License as
   published by the Free Software Foundation; either version 2, or (at
   your option) any later version.

   This program 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
   General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */

#include "priv.h"

/* Implement file_chown as described in <hurd/fs.defs>. */
error_t
S_file_chown (struct protid *cred,
	      uid_t uid,
	      gid_t gid)
{
  CHANGE_NODE_FIELD (cred,
		   ({
		     if (!isowner (np, cred)
			 || ((!isuid (uid, cred)
			      || !groupmember (gid, cred))
			     && !isuid (0, cred)))
		       err = EPERM;
		     else
		       {
			 np->dn_stat.st_uid = uid;
			 np->dn_stat.st_gid = gid;
			 np->dn_set_ctime = 1;
		       }
		   }));
}