1 /*- 2 * SPDX-License-Identifier: BSD-4-Clause 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 #ifndef lint 42 static const char rcsid[] = 43 "$FreeBSD$"; 44 #endif /* not lint */ 45 46 #include <err.h> 47 #include <stdio.h> 48 #include <stdlib.h> 49 #include <string.h> 50 #include <unistd.h> 51 #include "hash.h" 52 53 /* Default location of netgroup file. */ 54 char *netgroup = "/etc/netgroup"; 55 56 /* Stored hash table version of 'forward' netgroup database. */ 57 struct group_entry *gtable[TABLESIZE]; 58 59 /* 60 * Stored hash table of 'reverse' netgroup member database 61 * which we will construct. 62 */ 63 struct member_entry *mtable[TABLESIZE]; 64 65 static void 66 usage(void) 67 { 68 fprintf (stderr,"usage: revnetgroup -u | -h [-f netgroup_file]\n"); 69 exit(1); 70 } 71 72 int 73 main(int argc, char *argv[]) 74 { 75 FILE *fp; 76 char readbuf[LINSIZ]; 77 struct group_entry *gcur; 78 struct member_entry *mcur; 79 char *host, *user, *domain; 80 int ch; 81 char *key = NULL, *data = NULL; 82 int hosts = -1, i; 83 84 if (argc < 2) 85 usage(); 86 87 while ((ch = getopt(argc, argv, "uhf:")) != -1) { 88 switch(ch) { 89 case 'u': 90 if (hosts != -1) { 91 warnx("please use only one of -u or -h"); 92 usage(); 93 } 94 hosts = 0; 95 break; 96 case 'h': 97 if (hosts != -1) { 98 warnx("please use only one of -u or -h"); 99 usage(); 100 } 101 hosts = 1; 102 break; 103 case 'f': 104 netgroup = optarg; 105 break; 106 default: 107 usage(); 108 break; 109 } 110 } 111 112 if (hosts == -1) 113 usage(); 114 115 if (strcmp(netgroup, "-")) { 116 if ((fp = fopen(netgroup, "r")) == NULL) { 117 err(1, "%s", netgroup); 118 } 119 } else { 120 fp = stdin; 121 } 122 123 /* Stuff all the netgroup names and members into a hash table. */ 124 while (fgets(readbuf, LINSIZ, fp)) { 125 if (readbuf[0] == '#') 126 continue; 127 /* handle backslash line continuations */ 128 while(readbuf[strlen(readbuf) - 2] == '\\') { 129 fgets((char *)&readbuf[strlen(readbuf) - 2], 130 sizeof(readbuf) - strlen(readbuf), fp); 131 } 132 data = NULL; 133 if ((data = (char *)(strpbrk(readbuf, " \t") + 1)) < (char *)2) 134 continue; 135 key = (char *)&readbuf; 136 *(data - 1) = '\0'; 137 store(gtable, key, data); 138 } 139 140 fclose(fp); 141 142 /* 143 * Find all members of each netgroup and keep track of which 144 * group they belong to. 145 */ 146 for (i = 0; i < TABLESIZE; i++) { 147 gcur = gtable[i]; 148 while(gcur) { 149 __setnetgrent(gcur->key); 150 while(__getnetgrent(&host, &user, &domain) != 0) { 151 if (hosts ? host && strcmp(host,"-") : user && strcmp(user, "-")) 152 mstore(mtable, hosts ? host : user, gcur->key, domain); 153 } 154 gcur = gcur->next; 155 } 156 } 157 158 /* Release resources used by the netgroup parser code. */ 159 __endnetgrent(); 160 161 /* Spew out the results. */ 162 for (i = 0; i < TABLESIZE; i++) { 163 mcur = mtable[i]; 164 while(mcur) { 165 struct grouplist *tmp; 166 printf ("%s.%s\t", mcur->key, mcur->domain); 167 tmp = mcur->groups; 168 while(tmp) { 169 printf ("%s", tmp->groupname); 170 tmp = tmp->next; 171 if (tmp) 172 printf(","); 173 } 174 mcur = mcur->next; 175 printf ("\n"); 176 } 177 } 178 179 /* Let the OS free all our resources. */ 180 exit(0); 181 } 182