inet/netgroup.h

   1 /* Internal header for netgroup related functions.
   2    Copyright (C) 1996, 1997 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Library General Public License as
   7    published by the Free Software Foundation; either version 2 of the
   8    License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Library General Public License for more details.
  14
  15    You should have received a copy of the GNU Library General Public
  16    License along with the GNU C Library; see the file COPYING.LIB.  If not,
  17    write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  18    Boston, MA 02111-1307, USA.  */
  19
  20 #ifndef _NETGROUP_H
  21 #define _NETGROUP_H     1
  22
  23 /* A netgroup can consist of names of other netgroups.  We have to
  24    track which netgroups were read and which still have to be read.  */
  25 struct name_list
  26 {
  27   const char *name;
  28   struct name_list *next;
  29 };
  30
  31
  32 /* Dataset for iterating netgroups.  */
  33 struct __netgrent
  34 {
  35   enum { triple_val, group_val } type;
  36
  37   union
  38   {
  39     struct
  40     {
  41       const char *host;
  42       const char *user;
  43       const char *domain;
  44     }
  45     triple;
  46
  47     const char *group;
  48   } val;
  49
  50   /* Room for the data kept between the calls to the netgroup
  51      functions.  We must avoid global variables.  */
  52   char *data;
  53   size_t data_size;
  54   char *cursor;
  55   int first;
  56
  57   struct name_list *known_groups;
  58   struct name_list *needed_groups;
  59 };
  60
  61
  62 /* The internal netgroup handling functions might be called from outside.  */
  63 extern int __internal_setnetgrent (const char *group,
  64                                    struct __netgrent *datap);
  65 extern void __internal_endnetgrent (struct __netgrent *datap);
  66 extern int __internal_getnetgrent_r (char **hostp, char **userp,
  67                                      char **domainp, struct __netgrent *datap,
  68                                      char *buffer, size_t buflen, int *errnop);
  69
  70 #endif /* netgroup.h */