libexec/revnetgroup/hash.h

   1 /*
   2  * Copyright (c) 1995
   3  *      Bill Paul <wpaul@ctr.columbia.edu>.  All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. All advertising materials mentioning features or use of this software
  14  *    must display the following acknowledgement:
  15  *      This product includes software developed by Bill Paul.
  16  * 4. Neither the name of the author nor the names of any co-contributors
  17  *    may be used to endorse or promote products derived from this software
  18  *    without specific prior written permission.
  19  *
  20  * THIS SOFTWARE IS PROVIDED BY Bill Paul AND CONTRIBUTORS ``AS IS'' AND
  21  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  22  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  23  * ARE DISCLAIMED.  IN NO EVENT SHALL Bill Paul OR CONTRIBUTORS BE LIABLE
  24  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  25  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  26  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  27  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  28  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  29  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  30  * SUCH DAMAGE.
  31  *
  32  * $FreeBSD: src/libexec/revnetgroup/hash.h,v 1.6 1999/08/28 00:09:48 peter Exp $
  33  * $DragonFly: src/libexec/revnetgroup/hash.h,v 1.3 2003/11/14 03:54:30 dillon Exp $
  34  */
  35
  36 /* Groupname entry hung off a member_entry node. */
  37 struct grouplist {
  38         char *groupname;
  39         struct grouplist *next;
  40 };
  41
  42 /* Entry in the cooked member list hash table. */
  43 struct member_entry {
  44         char *key;
  45         char *domain;
  46         struct grouplist *groups;
  47         struct member_entry *next;
  48 };
  49
  50 /* Entry in the raw netgroup table. */
  51 struct group_entry {
  52         char *key;
  53         char *data;
  54         struct group_entry *next;
  55 };
  56
  57 /* Table size (chosen arbitrarily). Not too big, not too small. */
  58 #define TABLESIZE 256
  59 #define HASH_MASK 0x000000FF
  60
  61 #define LINSIZ 1024 * 10
  62
  63 extern void store ( struct group_entry ** , char *, char * );
  64 extern void mstore ( struct member_entry ** , char *, char *, char * );
  65 extern char *lookup ( struct group_entry **, char * );
  66 extern void __endnetgrent ( void );
  67 extern void __setnetgrent ( char * );
  68 extern int __getnetgrent ( char **, char **, char ** );