1 /* $NetBSD: revnetgroup.c,v 1.14 2009/04/19 06:06:40 lukem Exp $ */ 2 3 /* 4 * Copyright (c) 1995 5 * Bill Paul <wpaul@ctr.columbia.edu>. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by Bill Paul. 18 * 4. Neither the name of the author nor the names of any co-contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY Bill Paul AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL Bill Paul OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 * 34 * reverse netgroup map generator program 35 * 36 * Written by Bill Paul <wpaul@ctr.columbia.edu> 37 * Center for Telecommunications Research 38 * Columbia University, New York City 39 * 40 */ 41 42 #include <sys/cdefs.h> 43 #ifndef lint 44 __RCSID("$NetBSD: revnetgroup.c,v 1.14 2009/04/19 06:06:40 lukem Exp $"); 45 #endif 46 47 #include <ctype.h> 48 #include <err.h> 49 #include <errno.h> 50 #include <stdio.h> 51 #include <stdlib.h> 52 #include <string.h> 53 #include <unistd.h> 54 55 #include "hash.h" 56 #include "protos.h" 57 58 int main(int, char *[]); 59 void usage(void); 60 61 62 63 /* Default location of netgroup file. */ 64 const char *netgroup = "/etc/netgroup"; 65 66 /* Stored hash table version of 'forward' netgroup database. */ 67 struct group_entry *gtable[TABLESIZE]; 68 69 /* 70 * Stored hash table of 'reverse' netgroup member database 71 * which we will construct. 72 */ 73 struct member_entry *mtable[TABLESIZE]; 74 75 void 76 usage(void) 77 { 78 79 fprintf (stderr,"usage: %s -u|-h [-f netgroup file]\n", getprogname()); 80 exit(1); 81 } 82 83 int 84 main(int argc, char *argv[]) 85 { 86 struct group_entry *gcur; 87 struct member_entry *mcur; 88 FILE *fp; 89 char *line, *p, *host, *user, *domain; 90 int ch, i; 91 size_t len; 92 char *key; 93 int hosts = -1; 94 95 if (argc < 2) 96 usage(); 97 98 while ((ch = getopt(argc, argv, "uhf:")) != -1) { 99 switch(ch) { 100 case 'u': 101 if (hosts != -1) { 102 warnx("please use only one of -u or -h"); 103 usage(); 104 } 105 hosts = 0; 106 break; 107 case 'h': 108 if (hosts != -1) { 109 warnx("please use only one of -u or -h"); 110 usage(); 111 } 112 hosts = 1; 113 break; 114 case 'f': 115 netgroup = optarg; 116 break; 117 default: 118 usage(); 119 break; 120 } 121 } 122 123 if (hosts == -1) 124 usage(); 125 126 if (strcmp(netgroup, "-")) { 127 if ((fp = fopen(netgroup, "r")) == NULL) { 128 err(1, "%s", netgroup); 129 } 130 } else { 131 fp = stdin; 132 } 133 134 /* Stuff all the netgroup names and members into a hash table. */ 135 for (; 136 (line = fparseln(fp, &len, NULL, NULL, FPARSELN_UNESCALL)); 137 free(line)) { 138 if (len == 0) 139 continue; 140 p = line; 141 142 for (key = p; *p && isspace((unsigned char)*p) == 0; p++) 143 ; 144 while (*p && isspace((unsigned char)*p)) 145 *p++ = '\0'; 146 store(gtable, key, p); 147 } 148 149 fclose(fp); 150 151 /* 152 * Find all members of each netgroup and keep track of which 153 * group they belong to. 154 */ 155 for (i = 0; i < TABLESIZE; i++) { 156 gcur = gtable[i]; 157 while (gcur) { 158 rng_setnetgrent(gcur->key); 159 while (rng_getnetgrent(&host, &user, &domain) != 0) { 160 if (hosts) { 161 if (!(host && !strcmp(host,"-"))) { 162 mstore(mtable, 163 host ? host : "*", 164 gcur->key, 165 domain ? domain : "*"); 166 } 167 } else { 168 if (!(user && !strcmp(user,"-"))) { 169 mstore(mtable, 170 user ? user : "*", 171 gcur->key, 172 domain ? domain : "*"); 173 } 174 } 175 } 176 gcur = gcur->next; 177 } 178 } 179 180 /* Release resources used by the netgroup parser code. */ 181 rng_endnetgrent(); 182 183 /* Spew out the results. */ 184 for (i = 0; i < TABLESIZE; i++) { 185 mcur = mtable[i]; 186 while (mcur) { 187 struct grouplist *tmp; 188 printf ("%s.%s\t", mcur->key, mcur->domain); 189 tmp = mcur->groups; 190 while (tmp) { 191 printf ("%s", tmp->groupname); 192 tmp = tmp->next; 193 if (tmp) 194 printf(","); 195 } 196 mcur = mcur->next; 197 printf ("\n"); 198 } 199 } 200 201 /* Let the OS free all our resources. */ 202 exit(0); 203 } 204