1 /* Internal header for netgroup related functions. 2 Copyright (C) 1996-2022 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 Lesser General Public 7 License as published by the Free Software Foundation; either 8 version 2.1 of the 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 Lesser General Public License for more details. 14 15 You should have received a copy of the GNU Lesser General Public 16 License along with the GNU C Library; if not, see 17 <https://www.gnu.org/licenses/>. */ 18 19 #ifndef _NETGROUP_H 20 #define _NETGROUP_H 1 21 22 #include <nsswitch.h> 23 24 /* A netgroup can consist of names of other netgroups. We have to 25 track which netgroups were read and which still have to be read. */ 26 struct name_list 27 { 28 struct name_list *next; 29 char name[]; 30 }; 31 32 33 /* Dataset for iterating netgroups. */ 34 struct __netgrent 35 { 36 enum { triple_val, group_val } type; 37 38 union 39 { 40 struct 41 { 42 const char *host; 43 const char *user; 44 const char *domain; 45 } 46 triple; 47 48 const char *group; 49 } val; 50 51 /* Room for the data kept between the calls to the netgroup 52 functions. We must avoid global variables. */ 53 char *data; 54 size_t data_size; 55 union 56 { 57 char *cursor; 58 unsigned long int position; 59 }; 60 int first; 61 62 struct name_list *known_groups; 63 struct name_list *needed_groups; 64 65 /* This handle for the NSS data base is shared between all 66 set/get/endXXXent functions. */ 67 struct nss_action *nip; 68 }; 69 70 71 /* The internal netgroup handling functions might be called from outside. */ 72 extern int __internal_setnetgrent (const char *group, 73 struct __netgrent *datap); 74 libc_hidden_proto (__internal_setnetgrent) 75 extern void __internal_endnetgrent (struct __netgrent *datap); 76 libc_hidden_proto (__internal_endnetgrent) 77 extern int __internal_getnetgrent_r (char **hostp, char **userp, 78 char **domainp, struct __netgrent *datap, 79 char *buffer, size_t buflen, int *errnop); 80 libc_hidden_proto (__internal_getnetgrent_r) 81 82 #endif /* netgroup.h */ 83