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/* $OpenBSD: revnetgroup.c,v 1.3 2002/07/19 02:38:40 deraadt Exp $ */
/*
* Copyright (c) 1995
* Bill Paul <wpaul@ctr.columbia.edu>. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Bill Paul.
* 4. Neither the name of the author nor the names of any co-contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY Bill Paul AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL Bill Paul OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* reverse netgroup map generator program
*
* Written by Bill Paul <wpaul@ctr.columbia.edu>
* Center for Telecommunications Research
* Columbia University, New York City
*
* $FreeBSD: revnetgroup.c,v 1.7 1997/03/28 15:48:15 imp Exp $
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <err.h>
#include "hash.h"
#ifndef lint
static const char rcsid[] = "$OpenBSD: revnetgroup.c,v 1.3 2002/07/19 02:38:40 deraadt Exp $";
#endif
/* Default location of netgroup file. */
char *netgroup = "/etc/netgroup";
/* Stored hash table version of 'forward' netgroup database. */
struct group_entry *gtable[TABLESIZE];
/*
* Stored hash table of 'reverse' netgroup member database
* which we will construct.
*/
struct member_entry *mtable[TABLESIZE];
void
usage(char *prog)
{
fprintf (stderr,"usage: %s -u|-h [-f netgroup file]\n",prog);
exit(1);
}
int
main(int argc, char *argv[])
{
FILE *fp;
char readbuf[LINSIZ];
struct group_entry *gcur;
struct member_entry *mcur;
char *host, *user, *domain;
extern char *optarg;
int ch;
char *key = NULL, *data = NULL;
int hosts = -1, i;
if (argc < 2)
usage(argv[0]);
while ((ch = getopt(argc, argv, "uhf:")) != -1) {
switch (ch) {
case 'u':
if (hosts != -1) {
warnx("please use only one of -u or -h");
usage(argv[0]);
}
hosts = 0;
break;
case 'h':
if (hosts != -1) {
warnx("please use only one of -u or -h");
usage(argv[0]);
}
hosts = 1;
break;
case 'f':
netgroup = optarg;
break;
default:
usage(argv[0]);
break;
}
}
if (hosts == -1)
usage(argv[0]);
if (strcmp(netgroup, "-")) {
if ((fp = fopen(netgroup, "r")) == NULL) {
err(1, "%s", netgroup);
}
} else {
fp = stdin;
}
/* Stuff all the netgroup names and members into a hash table. */
while (fgets(readbuf, LINSIZ, fp)) {
if (readbuf[0] == '#')
continue;
/* handle backslash line continuations */
while (readbuf[strlen(readbuf) - 2] == '\\') {
fgets((char *)&readbuf[strlen(readbuf) - 2],
sizeof(readbuf) - strlen(readbuf), fp);
}
data = NULL;
if ((data = (char *)(strpbrk(readbuf, " \t") + 1)) < (char *)2)
continue;
key = (char *)&readbuf;
*(data - 1) = '\0';
store(gtable, key, data);
}
fclose(fp);
/*
* Find all members of each netgroup and keep track of which
* group they belong to.
*/
for (i = 0; i < TABLESIZE; i++) {
gcur = gtable[i];
while (gcur) {
__setnetgrent(gcur->key);
while (__getnetgrent(&host, &user, &domain) != NULL) {
if (hosts) {
if (!(host && !strcmp(host,"-"))) {
mstore(mtable,
host ? host : "*",
gcur->key,
domain ? domain : "*");
}
} else {
if (!(user && !strcmp(user,"-"))) {
mstore(mtable,
user ? user : "*",
gcur->key,
domain ? domain : "*");
}
}
}
gcur = gcur->next;
}
}
/* Release resources used by the netgroup parser code. */
__endnetgrent();
/* Spew out the results. */
for (i = 0; i < TABLESIZE; i++) {
mcur = mtable[i];
while (mcur) {
struct grouplist *tmp;
printf ("%s.%s\t", mcur->key, mcur->domain);
tmp = mcur->groups;
while (tmp) {
printf ("%s", tmp->groupname);
tmp = tmp->next;
if (tmp)
printf(",");
}
mcur = mcur->next;
printf ("\n");
}
}
/* Let the OS free all our resources. */
exit(0);
}
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