program parses the /etc/netgroup file into netgroup.byuser and netgroup.byhost format for NIS. I used hash tables to store the initial netgroup data in memory and to construct the 'reverse' netgroup output. It seems just as fast as the SunOS revnetgroup, which is surprising considering this is my first attempt at using hash tables in a real application. :) Note that I canibalized a large chunk of getnetgrent.c to save myself from having to write my own netgroup parsing functions.
168 lines
4.4 KiB
C
168 lines
4.4 KiB
C
/*
|
|
* 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
|
|
*
|
|
* $Id$
|
|
*/
|
|
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include "hash.h"
|
|
|
|
#define LINSIZ 1024
|
|
|
|
/* 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];
|
|
|
|
extern void store __P(( struct group_entry ** , char *, char * ));
|
|
extern void mstore __P(( struct member_entry ** , char *, char *, char * ));
|
|
extern char *lookup __P(( struct group_entry **, char * ));
|
|
|
|
void usage(prog)
|
|
char *prog;
|
|
{
|
|
fprintf (stderr,"usage: %s -u|-h [-f netgroup file]\n",prog);
|
|
exit(1);
|
|
}
|
|
|
|
extern char *optarg;
|
|
|
|
main(argc, argv)
|
|
int argc;
|
|
char *argv[0];
|
|
{
|
|
FILE *fp;
|
|
char readbuf[LINSIZ];
|
|
struct group_entry *gcur;
|
|
struct member_entry *mcur;
|
|
char *host, *user, *domain;
|
|
char ch;
|
|
char *key = NULL, *data = NULL;
|
|
int hosts, i;
|
|
|
|
if (argc < 2)
|
|
usage(argv[0]);
|
|
|
|
while ((ch = getopt(argc, argv, "uhf:")) != EOF) {
|
|
switch(ch) {
|
|
case 'u':
|
|
hosts = 0;
|
|
break;
|
|
case 'h':
|
|
hosts = 1;
|
|
break;
|
|
case 'f':
|
|
netgroup = optarg;
|
|
break;
|
|
default:
|
|
usage(argv[0]);
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (strcmp(netgroup, "-")) {
|
|
if ((fp = fopen(netgroup, "r")) == NULL) {
|
|
perror(netgroup);
|
|
exit(1);
|
|
}
|
|
} else {
|
|
fp = stdin;
|
|
}
|
|
|
|
/* Stuff all the netgroup names and members into a hash table. */
|
|
while (fgets(readbuf, LINSIZ, fp)) {
|
|
if (readbuf[0] == '#')
|
|
continue;
|
|
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 ? host && strcmp(host,"-") : user && strcmp(user, "-"))
|
|
mstore(mtable, hosts ? host : user, gcur->key, 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);
|
|
}
|