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[unix-history] / usr / src / lib / libc / net / getservbyport.c

/*
 * Copyright (c) 1983 Regents of the University of California.
 * All rights reserved.
 *
 * %sccs.include.redist.c%
 */

#if defined(LIBC_SCCS) && !defined(lint)
static char sccsid[] = "@(#)getservbyport.c	5.7 (Berkeley) %G%";
#endif /* LIBC_SCCS and not lint */

#include <netdb.h>
#include <string.h>

extern int _serv_stayopen;

struct servent *
getservbyport(port, proto)
	int port;
	const char *proto;
{
	register struct servent *p;

	setservent(_serv_stayopen);
	while (p = getservent()) {
		if (p->s_port != port)
			continue;
		if (proto == 0 || strcmp(p->s_proto, proto) == 0)
			break;
	}
	if (!_serv_stayopen)
		endservent();
	return (p);
}