1 /* 2 * Copyright (c) 1983 Regents of the University of California. 3 * All rights reserved. The Berkeley software License Agreement 4 * specifies the terms and conditions for redistribution. 5 */ 6 7 #if defined(LIBC_SCCS) && !defined(lint) 8 static char sccsid[] = "@(#)getproto.c 5.3 (Berkeley) 05/19/86"; 9 #endif LIBC_SCCS and not lint 10 11 #include <netdb.h> 12 13 extern int _proto_stayopen; 14 15 struct protoent * 16 getprotobynumber(proto) 17 register int proto; 18 { 19 register struct protoent *p; 20 21 setprotoent(_proto_stayopen); 22 while (p = getprotoent()) 23 if (p->p_proto == proto) 24 break; 25 if (!_proto_stayopen) 26 endprotoent(); 27 return (p); 28 } 29