usr/src/cmd/oamuser/lib/vuid.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 #ident  "%Z%%M% %I%     %E% SMI"       /* SVr4.0 1.2 */
  27
  28 #include        <sys/types.h>
  29 #include        <stdio.h>
  30 #include        <pwd.h>
  31 #include        <userdefs.h>
  32 #include        <users.h>
  33
  34 #include        <sys/param.h>
  35
  36 #ifndef MAXUID
  37 #include        <limits.h>
  38 #define MAXUID  UID_MAX
  39 #endif
  40
  41 struct passwd *getpwuid();
  42
  43 int
  44 valid_uid( uid, pptr )
  45 uid_t uid;
  46 struct passwd **pptr;
  47 {
  48         register struct passwd *t_pptr;
  49
  50         if( uid <= 0 ) return( INVALID );
  51         if( uid <= DEFRID ) {
  52                 if( pptr ) *pptr = getpwuid( uid );
  53
  54                 return( RESERVED );
  55         }
  56
  57         if( uid > MAXUID ) return( TOOBIG );
  58
  59         if( t_pptr = getpwuid( uid ) ) {
  60                 if( pptr ) *pptr = t_pptr;
  61                 return( NOTUNIQUE );
  62         }
  63
  64         return( UNIQUE );
  65 }