usr/src/cmd/oamuser/lib/vgid.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 1.4 */
  27
  28 #include        <sys/types.h>
  29 #include        <stdio.h>
  30 #include        <grp.h>
  31 #include        <users.h>
  32 #include        <sys/param.h>
  33 #include        <userdefs.h>
  34
  35 /*
  36         MAXUID should be in param.h; if it isn't,
  37         try for UID_MAX in limits.h
  38 */
  39 #ifndef MAXUID
  40 #include        <limits.h>
  41 #define MAXUID  UID_MAX
  42 #endif
  43
  44 struct group *getgrgid();
  45
  46 /*  validate a GID */
  47 int
  48 valid_gid( gid, gptr )
  49 gid_t gid;
  50 struct group **gptr;
  51 {
  52         register struct group *t_gptr;
  53
  54         if( gid < 0 ) return( INVALID );
  55
  56         if( gid > MAXUID ) return( TOOBIG );
  57
  58         if( t_gptr = getgrgid( gid ) ) {
  59                 if( gptr ) *gptr = t_gptr;
  60                 return( NOTUNIQUE );
  61         }
  62
  63         if( gid <= DEFGID ) {
  64                 if( gptr ) *gptr = getgrgid( gid );
  65                 return( RESERVED );
  66         }
  67
  68         return( UNIQUE );
  69 }