2.11BSD/src/lib/libc/net/getproto.c

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/*
 * Copyright (c) 1983 Regents of the University of California.
 * All rights reserved.  The Berkeley software License Agreement
 * specifies the terms and conditions for redistribution.
 */

#if defined(LIBC_SCCS) && !defined(lint)
static char sccsid[] = "@(#)getproto.c	5.3 (Berkeley) 5/19/86";
#endif LIBC_SCCS and not lint

#include <netdb.h>

extern int _proto_stayopen;

struct protoent *
getprotobynumber(proto)
	register int proto;
{
	register struct protoent *p;

	setprotoent(_proto_stayopen);
	while (p = getprotoent())
		if (p->p_proto == proto)
			break;
	if (!_proto_stayopen)
		endprotoent();
	return (p);
}