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 * reverse netgroup map generator program 33 * 34 * Written by Bill Paul <wpaul@ctr.columbia.edu> 35 * Center for Telecommunications Research 36 * Columbia University, New York City 37 * 38 * $Id$ 39 */ 40 41 #include <stdio.h> 42 #include <stdlib.h> 43 #include <string.h> 44 #include <errno.h> 45 #include <err.h> 46 #include "hash.h" 47 48 #ifndef lint 49 static const char rcsid[] = "$Id$"; 50 #endif 51 52 /* Default location of netgroup file. */ 53 char *netgroup = "/etc/netgroup"; 54 55 /* Stored hash table version of 'forward' netgroup database. */ 56 struct group_entry *gtable[TABLESIZE]; 57 58 /* 59 * Stored hash table of 'reverse' netgroup member database 60 * which we will construct. 61 */ 62 struct member_entry *mtable[TABLESIZE]; 63 64 void usage(prog) 65 char *prog; 66 { 67 fprintf (stderr,"usage: %s -u|-h [-f netgroup file]\n",prog); 68 exit(1); 69 } 70 71 extern char *optarg; 72 73 int 74 main(argc, argv) 75 int argc; 76 char *argv[]; 77 { 78 FILE *fp; 79 char readbuf[LINSIZ]; 80 struct group_entry *gcur; 81 struct member_entry *mcur; 82 char *host, *user, *domain; 83 int ch; 84 char *key = NULL, *data = NULL; 85 int hosts = -1, i; 86 87 if (argc < 2) 88 usage(argv[0]); 89 90 while ((ch = getopt(argc, argv, "uhf:")) != EOF) { 91 switch(ch) { 92 case 'u': 93 if (hosts != -1) { 94 warnx("please use only one of -u or -h"); 95 usage(argv[0]); 96 } 97 hosts = 0; 98 break; 99 case 'h': 100 if (hosts != -1) { 101 warnx("please use only one of -u or -h"); 102 usage(argv[0]); 103 } 104 hosts = 1; 105 break; 106 case 'f': 107 netgroup = optarg; 108 break; 109 default: 110 usage(argv[0]); 111 break; 112 } 113 } 114 115 if (hosts == -1) 116 usage(argv[0]); 117 118 if (strcmp(netgroup, "-")) { 119 if ((fp = fopen(netgroup, "r")) == NULL) { 120 err(1,netgroup); 121 } 122 } else { 123 fp = stdin; 124 } 125 126 /* Stuff all the netgroup names and members into a hash table. */ 127 while (fgets(readbuf, LINSIZ, fp)) { 128 if (readbuf[0] == '#') 129 continue; 130 /* handle backslash line continuations */ 131 while(readbuf[strlen(readbuf) - 2] == '\\') { 132 fgets((char *)&readbuf[strlen(readbuf) - 2], 133 sizeof(readbuf) - strlen(readbuf), fp); 134 } 135 data = NULL; 136 if ((data = (char *)(strpbrk(readbuf, " \t") + 1)) < (char *)2) 137 continue; 138 key = (char *)&readbuf; 139 *(data - 1) = '\0'; 140 store(gtable, key, data); 141 } 142 143 fclose(fp); 144 145 /* 146 * Find all members of each netgroup and keep track of which 147 * group they belong to. 148 */ 149 for (i = 0; i < TABLESIZE; i++) { 150 gcur = gtable[i]; 151 while(gcur) { 152 __setnetgrent(gcur->key); 153 while(__getnetgrent(&host, &user, &domain) != NULL) { 154 if (hosts ? host && strcmp(host,"-") : user && strcmp(user, "-")) 155 mstore(mtable, hosts ? host : user, gcur->key, domain); 156 } 157 gcur = gcur->next; 158 } 159 } 160 161 /* Release resources used by the netgroup parser code. */ 162 __endnetgrent(); 163 164 /* Spew out the results. */ 165 for (i = 0; i < TABLESIZE; i++) { 166 mcur = mtable[i]; 167 while(mcur) { 168 struct grouplist *tmp; 169 printf ("%s.%s\t", mcur->key, mcur->domain); 170 tmp = mcur->groups; 171 while(tmp) { 172 printf ("%s", tmp->groupname); 173 tmp = tmp->next; 174 if (tmp) 175 printf(","); 176 } 177 mcur = mcur->next; 178 printf ("\n"); 179 } 180 } 181 182 /* Let the OS free all our resources. */ 183 exit(0); 184 } 185