xref: /titanic_41/usr/src/lib/libc/port/sys/getpeerucred.c (revision 6dfee4834394825da35b977ca71cdc965bc7b6a4)
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, Version 1.0 only
6  * (the "License").  You may not use this file except in compliance
7  * with the License.
8  *
9  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10  * or http://www.opensolaris.org/os/licensing.
11  * See the License for the specific language governing permissions
12  * and limitations under the License.
13  *
14  * When distributing Covered Code, include this CDDL HEADER in each
15  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16  * If applicable, add the following below this CDDL HEADER, with the
17  * fields enclosed by brackets "[]" replaced with your own identifying
18  * information: Portions Copyright [yyyy] [name of copyright owner]
19  *
20  * CDDL HEADER END
21  */
22 /*
23  * Copyright 2004 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 "synonyms.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