/* * Copyright (c) 1983, 1993 *	The Regents of the University of California.  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 the University of *	California, Berkeley and its contributors. * 4. Neither the name of the University nor the names of its contributors *    may be used to endorse or promote products derived from this software *    without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 THE REGENTS 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. */#if defined(LIBC_SCCS) && !defined(lint)static char sccsid[] = "@(#)getservent.c	8.1 (Berkeley) 6/4/93";#endif /* LIBC_SCCS and not lint */#include <sys/types.h>#include <string.h>#include <stdlib.h>#include <ctype.h>#include <net/netdb.h>#include <stdio.h>#include <errno.h>#include <arpa/nameser.h>#define	MAXALIASES	35static char SERVDB[] = _PATH_SERVICES;static FILE *servf = NULL;static char line[BUFSIZ+1];static struct servent serv;static char *serv_aliases[MAXALIASES];int _serv_stayopen;voidsetservent(f)	int f;{	if (servf == NULL)		servf = fopen(SERVDB, "r" );	else		rewind(servf);	_serv_stayopen |= f;}voidendservent(){	if (servf) {		fclose(servf);		servf = NULL;	}	_serv_stayopen = 0;}struct servent *getservent(){	char *p;	register char *cp, **q;	if (servf == NULL && (servf = fopen(SERVDB, "r" )) == NULL)		return (NULL);again:	if ((p = fgets(line, BUFSIZ, servf)) == NULL)		return (NULL);	if (*p == '#')		goto again;	cp = strpbrk(p, "#\n");	if (cp == NULL)		goto again;	*cp = '\0';	serv.s_name = p;	p = strpbrk(p, " \t");	if (p == NULL)		goto again;	*p++ = '\0';	while (*p == ' ' || *p == '\t')		p++;	cp = strpbrk(p, ",/");	if (cp == NULL)		goto again;	*cp++ = '\0';	serv.s_port = htons((u_short)atoi(p));	serv.s_proto = cp;	q = serv.s_aliases = serv_aliases;	cp = strpbrk(cp, " \t");	if (cp != NULL)		*cp++ = '\0';	while (cp && *cp) {		if (*cp == ' ' || *cp == '\t') {			cp++;			continue;		}		if (q < &serv_aliases[MAXALIASES - 1])			*q++ = cp;		cp = strpbrk(cp, " \t");		if (cp != NULL)			*cp++ = '\0';	}	*q = NULL;	return (&serv);}