1 /* 2 * Copyright (c) 1983 Regents of the University of California. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms are permitted 6 * provided that this notice is preserved and that due credit is given 7 * to the University of California at Berkeley. The name of the University 8 * may not be used to endorse or promote products derived from this 9 * software without specific prior written permission. This software 10 * is provided ``as is'' without express or implied warranty. 11 */ 12 13 #if defined(LIBC_SCCS) && !defined(lint) 14 static char sccsid[] = "@(#)getproto.c 5.4 (Berkeley) 03/07/88"; 15 #endif /* LIBC_SCCS and not lint */ 16 17 #include <netdb.h> 18 19 extern int _proto_stayopen; 20 21 struct protoent * 22 getprotobynumber(proto) 23 register int proto; 24 { 25 register struct protoent *p; 26 27 setprotoent(_proto_stayopen); 28 while (p = getprotoent()) 29 if (p->p_proto == proto) 30 break; 31 if (!_proto_stayopen) 32 endprotoent(); 33 return (p); 34 } 35