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From: jordan@ucbarpa.Berkeley.EDU (Jordan Hayes)
Newsgroups: net.bugs.4bsd
Subject: problems with getnetent()
Message-ID: <15478@ucbvax.BERKELEY.EDU>
Date: Sat, 30-Aug-86 18:32:12 EDT
Article-I.D.: ucbvax.15478
Posted: Sat Aug 30 18:32:12 1986
Date-Received: Sun, 31-Aug-86 09:04:13 EDT
Sender: usenet@ucbvax.BERKELEY.EDU
Reply-To: jordan@ucbarpa.Berkeley.EDU (Jordan Hayes)
Organization: University of California, Berkeley
Lines: 37

The 4.3 (and, I assume, moving backwards from there to 4.2, since I
looked at the SCCS info for it and it hasn't seen much re-write, mostly
little fixes) lib/libc/net/getnetent.c doesn't seem to do the right
thing. You can repeat it by writing a little program to try to get each
network entry and print it out ... I had problems with lines that have
neither an alias nor a comment right after a line that has both, but I
didn't do real extensive testing. The code looked pretty obscure, so I
re-wrote the routine. If you want a copy, drop me a note. I assume that
no one really uses this code very much, since it could just be
untested.

Here's the program I used to find the bug:
-----
#include <stdio.h>
#include <netdb.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>

main()
{
	register char	**cp;
	struct netent	*np;

	setnetent(1);

	while ((np = getnetent()) != (struct netent *)NULL) {
		printf("name\t%s\n", np->n_name);
		for (cp = np->n_aliases; cp && *cp && **cp; cp++)
			printf("alias\t%s\n", *cp);
		printf("addr\t%s\n\n", inet_ntoa(htonl(np->n_net)));
	}
}
-----

/jordan