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