/* $OpenBSD: getservbyport.c,v 1.8 2015/09/14 07:38:38 guenther Exp $ */ /* * 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. 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. */ #include <netdb.h> #include <stdio.h> #include <string.h> int getservbyport_r(int port, const char *proto, struct servent *se, struct servent_data *sd) { int error; setservent_r(sd->stayopen, sd); while ((error = getservent_r(se, sd)) == 0) { if (se->s_port != port) continue; if (proto == 0 || strcmp(se->s_proto, proto) == 0) break; } if (!sd->stayopen && sd->fp != NULL) { fclose(sd->fp); sd->fp = NULL; } return (error); } DEF_WEAK(getservbyport_r); struct servent * getservbyport(int port, const char *proto) { extern struct servent_data _servent_data; static struct servent serv; if (getservbyport_r(port, proto, &serv, &_servent_data) != 0) return (NULL); return (&serv); }