xref: /illumos-gate/usr/src/cmd/mailx/getname.c (revision 7c478bd9)
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 /*
27  * University Copyright- Copyright (c) 1982, 1986, 1988
28  * The Regents of the University of California
29  * All Rights Reserved
30  *
31  * University Acknowledgment- Portions of this document are derived from
32  * software developed by the University of California, Berkeley, and its
33  * contributors.
34  */
35 
36 #pragma ident	"%Z%%M%	%I%	%E% SMI"
37 
38 /*
39  * mailx -- a modified version of a University of California at Berkeley
40  *	mail program
41  */
42 
43 #include "rcv.h"
44 #include <pwd.h>
45 #ifdef preSVr4
46 extern struct passwd *getpwnam();
47 extern struct passwd *getpwuid();
48 #endif
49 
50 /*
51  * Search the passwd file for a uid.  Return name through ref parameter
52  * if found, indicating success with 0 return.  Return -1 on error.
53  * If -1 is passed as the user id, close the passwd file.
54  */
55 
56 int
getname(uid_t uid,char namebuf[])57 getname(uid_t uid, char namebuf[])
58 {
59 	struct passwd *pw;
60 
61 	if (uid == (uid_t)-1) {
62 		endpwent();
63 		return(0);
64 	}
65 	setpwent();
66 	pw = getpwuid(uid);
67 	if (pw) {
68 		strcpy(namebuf, pw->pw_name);
69 		return(0);
70 	}
71 	return(-1);
72 }
73 
74 /*
75  * Convert the passed name to a user id and return it.  Return -1
76  * on error.  Iff the name passed is 0, close the passwd file.
77  */
78 
79 uid_t
getuserid(char name[])80 getuserid(char name[])
81 {
82 	struct passwd *pw;
83 
84 	if (name == 0) {
85 		endpwent();
86 		return(0);
87 	}
88 	setpwent();
89 	pw = getpwnam(name);
90 	return pw ? pw->pw_uid : (uid_t)-1;
91 }
92