/* * Copyright (c) 1983 Regents of the University of California. * All rights reserved. * * Redistribution and use in source and binary forms are permitted * provided that the above copyright notice and this paragraph are * duplicated in all such forms and that any documentation, * advertising materials, and other materials related to such * distribution and use acknowledge that the software was developed * by the University of California, Berkeley.  The name of the * University may not be used to endorse or promote products derived * from this software without specific prior written permission. * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. */#if defined(LIBC_SCCS) && !defined(lint)static char sccsid[] = "@(#)getnetent.c	5.5 (Berkeley) 6/27/88";#endif /* LIBC_SCCS and not lint */#include "inetprivate.h"#define	MAXALIASES	35static char NETDB[] = _PATH_NETWORKS;static FILE *netf = NULL;static char line[BUFSIZ+1];static struct netent net;static char *net_aliases[MAXALIASES];static char *any(char *, char *);int _net_stayopen;extern u_int32_t inet_network(const char *cp);voidsetnetent(f)	int f;{	if (netf == NULL)		netf = fopen(NETDB, "r" );	else		rewind(netf);	_net_stayopen |= f;}voidendnetent(){	if (netf) {		fclose(netf);		netf = NULL;	}	_net_stayopen = 0;}struct netent *getnetent(){	char *p;	register char *cp, **q;	if (netf == NULL && (netf = fopen(NETDB, "r" )) == NULL)		return (NULL);again:	p = fgets(line, BUFSIZ, netf);	if (p == NULL)		return (NULL);	if (*p == '#')		goto again;	cp = any(p, "#\n");	if (cp == NULL)		goto again;	*cp = '\0';	net.n_name = p;	cp = any(p, " \t");	if (cp == NULL)		goto again;	*cp++ = '\0';	while (*cp == ' ' || *cp == '\t')		cp++;	p = any(cp, " \t");	if (p != NULL)		*p++ = '\0';	net.n_net = inet_network(cp);	net.n_addrtype = AF_INET;	q = net.n_aliases = net_aliases;	if (p != NULL) 		cp = p;	while (cp && *cp) {		if (*cp == ' ' || *cp == '\t') {			cp++;			continue;		}		if (q < &net_aliases[MAXALIASES - 1])			*q++ = cp;		cp = any(cp, " \t");		if (cp != NULL)			*cp++ = '\0';	}	*q = NULL;	return (&net);}static char *any(cp, match)	register char *cp;	char *match;{	register char *mp, c;	while (c = *cp) {		for (mp = match; *mp; mp++)			if (*mp == c)				return (cp);		cp++;	}	return ((char *)0);}