Formerly file-chown.c.~2~

1 files changed, 40 insertions, 0 deletions

diff --git a/libdiskfs/file-chown.c b/libdiskfs/file-chown.c
new file mode 100644
index 00000000..985b84ca
--- /dev/null
+++ b/libdiskfs/file-chown.c
@@ -0,0 +1,40 @@
+/* libdiskfs implementetation of fs.defs: file_chown
+   Copyright (C) 1992, 1993, 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
+diskfs_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;
+		       }
+		   }));
+}