8a16b7a18f
Mainly focus on files that use BSD 3-Clause license. The Software Package Data Exchange (SPDX) group provides a specification to make it easier for automated tools to detect and summarize well known opensource licenses. We are gradually adopting the specification, noting that the tags are considered only advisory and do not, in any way, superceed or replace the license texts. Special thanks to Wind River for providing access to "The Duke of Highlander" tool: an older (2014) run over FreeBSD tree was useful as a starting point.
159 lines
4.2 KiB
C
159 lines
4.2 KiB
C
/*-
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* SPDX-License-Identifier: BSD-3-Clause
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*
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* Copyright (c) 2009, Sun Microsystems, Inc.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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* - Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* - Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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* - Neither the name of Sun Microsystems, Inc. nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* Copyright (c) 1988 by Sun Microsystems, Inc.
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*/
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/*
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* rtime - get time from remote machine
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*
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* gets time, obtaining value from host
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* on the udp/time socket. Since timeserver returns
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* with time of day in seconds since Jan 1, 1900, must
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* subtract seconds before Jan 1, 1970 to get
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* what unix uses.
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*/
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#include "namespace.h"
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <errno.h>
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <sys/time.h>
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#include <netinet/in.h>
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#include <stdio.h>
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#include <netdb.h>
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#include "un-namespace.h"
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#if defined(LIBC_SCCS) && !defined(lint)
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static char sccsid[] = "@(#)rtime.c 2.2 88/08/10 4.0 RPCSRC; from 1.8 88/02/08 SMI";
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#endif
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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extern int _rpc_dtablesize( void );
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#define NYEARS (unsigned long)(1970 - 1900)
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#define TOFFSET (unsigned long)(60*60*24*(365*NYEARS + (NYEARS/4)))
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static void do_close( int );
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int
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rtime(struct sockaddr_in *addrp, struct timeval *timep,
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struct timeval *timeout)
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{
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int s;
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fd_set readfds;
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int res;
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unsigned long thetime;
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struct sockaddr_in from;
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socklen_t fromlen;
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int type;
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struct servent *serv;
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if (timeout == NULL) {
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type = SOCK_STREAM;
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} else {
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type = SOCK_DGRAM;
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}
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s = _socket(AF_INET, type, 0);
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if (s < 0) {
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return(-1);
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}
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addrp->sin_family = AF_INET;
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/* TCP and UDP port are the same in this case */
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if ((serv = getservbyname("time", "tcp")) == NULL) {
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return(-1);
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}
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addrp->sin_port = serv->s_port;
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if (type == SOCK_DGRAM) {
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res = _sendto(s, (char *)&thetime, sizeof(thetime), 0,
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(struct sockaddr *)addrp, sizeof(*addrp));
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if (res < 0) {
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do_close(s);
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return(-1);
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}
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do {
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FD_ZERO(&readfds);
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FD_SET(s, &readfds);
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res = _select(_rpc_dtablesize(), &readfds,
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(fd_set *)NULL, (fd_set *)NULL, timeout);
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} while (res < 0 && errno == EINTR);
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if (res <= 0) {
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if (res == 0) {
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errno = ETIMEDOUT;
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}
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do_close(s);
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return(-1);
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}
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fromlen = sizeof(from);
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res = _recvfrom(s, (char *)&thetime, sizeof(thetime), 0,
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(struct sockaddr *)&from, &fromlen);
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do_close(s);
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if (res < 0) {
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return(-1);
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}
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} else {
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if (_connect(s, (struct sockaddr *)addrp, sizeof(*addrp)) < 0) {
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do_close(s);
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return(-1);
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}
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res = _read(s, (char *)&thetime, sizeof(thetime));
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do_close(s);
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if (res < 0) {
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return(-1);
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}
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}
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if (res != sizeof(thetime)) {
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errno = EIO;
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return(-1);
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}
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thetime = ntohl(thetime);
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timep->tv_sec = thetime - TOFFSET;
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timep->tv_usec = 0;
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return(0);
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}
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static void
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do_close(int s)
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{
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int save;
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save = errno;
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(void)_close(s);
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errno = save;
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}
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