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      1 /*
      2  * CDDL HEADER START
      3  *
      4  * The contents of this file are subject to the terms of the
      5  * Common Development and Distribution License (the "License").
      6  * You may not use this file except in compliance with the License.
      7  *
      8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
      9  * or http://www.opensolaris.org/os/licensing.
     10  * See the License for the specific language governing permissions
     11  * and limitations under the License.
     12  *
     13  * When distributing Covered Code, include this CDDL HEADER in each
     14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
     15  * If applicable, add the following below this CDDL HEADER, with the
     16  * fields enclosed by brackets "[]" replaced with your own identifying
     17  * information: Portions Copyright [yyyy] [name of copyright owner]
     18  *
     19  * CDDL HEADER END
     20  */
     21 
     22 /*
     23  * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
     24  * Use is subject to license terms.
     25  */
     26 
     27 #pragma ident	"%Z%%M%	%I%	%E% SMI"
     28 
     29 #pragma weak _getpeerucred = getpeerucred
     30 
     31 #include "lint.h"
     32 
     33 #include <sys/types.h>
     34 #include <sys/syscall.h>
     35 #include <ucred.h>
     36 #include <sys/ucred.h>
     37 
     38 int
     39 getpeerucred(int fd, ucred_t **ucp)
     40 {
     41 	ucred_t *uc = *ucp;
     42 
     43 	if (uc == NULL) {
     44 		uc = _ucred_alloc();
     45 		if (uc == NULL)
     46 			return (-1);
     47 	}
     48 
     49 	if (syscall(SYS_ucredsys, UCREDSYS_GETPEERUCRED, fd, uc) != 0) {
     50 		if (*ucp == NULL)
     51 			ucred_free(uc);
     52 		return (-1);
     53 	}
     54 	*ucp = uc;
     55 	return (0);
     56 }
     57