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 /* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
23 /* All Rights Reserved */
24
25 /*
26 * Copyright 2005 Sun Microsystems, Inc. All rights reserved.
27 * Use is subject to license terms.
28 */
29
30 /*
31 * convert uid to login name; interface to getpwuid that keeps up to USIZE1
32 * names to avoid unnecessary accesses to passwd file
33 * returns ptr to NSZ-byte name (not necessarily null-terminated)
34 * returns ptr to "?" if cannot convert
35 */
36
37 #include <stdio.h>
38 #include <sys/types.h>
39 #include <sys/param.h>
40 #include "acctdef.h"
41 #include <pwd.h>
42
43 static int usize1;
44 static struct ulist {
45 char uname[NSZ];
46 uid_t uuid;
47 } ul[USIZE1];
48
49 char *strncpy();
50
51 char *
uidtonam(uid)52 uidtonam(uid)
53 uid_t uid;
54 {
55 register struct ulist *up;
56 struct passwd *getpwuid();
57 register struct passwd *pp;
58
59 for (up = ul; up < &ul[usize1]; up++)
60 if (uid == up->uuid)
61 return(up->uname);
62 setpwent();
63 if ((pp = getpwuid(uid)) == NULL)
64 return("?");
65 else {
66 if (usize1 < USIZE1) {
67 up->uuid = uid;
68 CPYN(up->uname, pp->pw_name);
69 usize1++;
70 }
71 return(pp->pw_name);
72 }
73 }
74