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 /* 23 * Copyright (c) 1988-1995 Sun Microsystems Inc 24 * All Rights Reserved. 25 * 26 * files/getgrent.c -- "files" backend for nsswitch "group" database 27 */ 28 29 #pragma ident "%Z%%M% %I% %E% SMI" 30 31 #include <grp.h> 32 #include <unistd.h> /* for GF_PATH */ 33 #include "files_common.h" 34 #include <strings.h> 35 36 static u_int 37 hash_grname(nss_XbyY_args_t *argp, int keyhash) 38 { 39 struct group *g = argp->returnval; 40 const char *name = keyhash ? argp->key.name : g->gr_name; 41 u_int hash = 0; 42 43 while (*name != 0) 44 hash = hash * 15 + *name++; 45 46 return (hash); 47 } 48 49 static u_int 50 hash_grgid(nss_XbyY_args_t *argp, int keyhash) 51 { 52 struct group *g = argp->returnval; 53 return (keyhash ? (u_int)argp->key.gid : (u_int)g->gr_gid); 54 } 55 56 static files_hash_func hash_gr[2] = { hash_grname, hash_grgid }; 57 58 static files_hash_t hashinfo = { 59 DEFAULTMUTEX, 60 sizeof (struct group), 61 NSS_BUFLEN_GROUP, 62 2, 63 hash_gr 64 }; 65 66 static int 67 check_grname(argp) 68 nss_XbyY_args_t *argp; 69 { 70 struct group *g = (struct group *)argp->returnval; 71 72 /* +/- entries only valid in compat source */ 73 if (g->gr_name != 0 && (g->gr_name[0] == '+' || g->gr_name[0] == '-')) 74 return (0); 75 return (strcmp(g->gr_name, argp->key.name) == 0); 76 } 77 78 static nss_status_t 79 getbyname(be, a) 80 files_backend_ptr_t be; 81 void *a; 82 { 83 return (_nss_files_XY_hash(be, a, 0, &hashinfo, 0, check_grname)); 84 } 85 86 static int 87 check_grgid(argp) 88 nss_XbyY_args_t *argp; 89 { 90 struct group *g = (struct group *)argp->returnval; 91 92 /* +/- entries only valid in compat source */ 93 if (g->gr_name != 0 && (g->gr_name[0] == '+' || g->gr_name[0] == '-')) 94 return (0); 95 return (g->gr_gid == argp->key.gid); 96 } 97 98 static nss_status_t 99 getbygid(be, a) 100 files_backend_ptr_t be; 101 void *a; 102 { 103 return (_nss_files_XY_hash(be, a, 0, &hashinfo, 1, check_grgid)); 104 } 105 106 static nss_status_t 107 getbymember(be, a) 108 files_backend_ptr_t be; 109 void *a; 110 { 111 struct nss_groupsbymem *argp = (struct nss_groupsbymem *) a; 112 113 return (_nss_files_do_all(be, argp, argp->username, 114 (files_do_all_func_t)argp->process_cstr)); 115 } 116 117 static files_backend_op_t group_ops[] = { 118 _nss_files_destr, 119 _nss_files_endent, 120 _nss_files_setent, 121 _nss_files_getent_rigid, 122 getbyname, 123 getbygid, 124 getbymember 125 }; 126 127 /*ARGSUSED*/ 128 nss_backend_t * 129 _nss_files_group_constr(dummy1, dummy2, dummy3) 130 const char *dummy1, *dummy2, *dummy3; 131 { 132 return (_nss_files_constr(group_ops, 133 sizeof (group_ops) / sizeof (group_ops[0]), 134 GF_PATH, 135 NSS_LINELEN_GROUP, 136 &hashinfo)); 137 } 138