-#ifndef _group_member_h_
-# define _group_member_h_ 1
+/* Determine whether group id is in calling user's group list.
-int
- group_member ();
+ Copyright (C) 1994, 1997, 2003 Free Software Foundation, Inc.
-#endif /* _group_member_h_ */
+ 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 3 of the License, 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, see <http://www.gnu.org/licenses/>. */
+
+#ifndef GROUP_MEMBER_H_
+# define GROUP_MEMBER_H_ 1
+
+# include <sys/types.h>
+
+int group_member (gid_t);
+
+#endif /* GROUP_MEMBER_H_ */