usr/src/cmd/mailx/getname.c

   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
  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
  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 }