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[/] [openrisc/] [trunk/] [rtos/] [rtems/] [c/] [src/] [librpc/] [src/] [rpc/] [rtime.c] - Rev 593
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/* * Sun RPC is a product of Sun Microsystems, Inc. and is provided for * unrestricted use provided that this legend is included on all tape * media and as a part of the software program in whole or part. Users * may copy or modify Sun RPC without charge, but are not authorized * to license or distribute it to anyone else except as part of a product or * program developed by the user. * * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE. * * Sun RPC is provided with no support and without any obligation on the * part of Sun Microsystems, Inc. to assist in its use, correction, * modification or enhancement. * * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC * OR ANY PART THEREOF. * * In no event will Sun Microsystems, Inc. be liable for any lost revenue * or profits or other special, indirect and consequential damages, even if * Sun has been advised of the possibility of such damages. * * Sun Microsystems, Inc. * 2550 Garcia Avenue * Mountain View, California 94043 */ /* * Copyright (c) 1988 by Sun Microsystems, Inc. */ /* * rtime - get time from remote machine * * gets time, obtaining value from host * on the udp/time socket. Since timeserver returns * with time of day in seconds since Jan 1, 1900, must * subtract seconds before Jan 1, 1970 to get * what unix uses. */ #include <stdlib.h> #include <string.h> #include <unistd.h> #include <errno.h> #include <sys/types.h> #include <sys/socket.h> #include <sys/time.h> #include <netinet/in.h> #include <stdio.h> #include <netdb.h> #if defined(LIBC_SCCS) && !defined(lint) /* from: static char sccsid[] = "@(#)rtime.c 2.2 88/08/10 4.0 RPCSRC; from 1.8 88/02/08 SMI"; */ static const char rcsid[] = "$FreeBSD: src/lib/libc/rpc/rtime.c,v 1.5 2000/01/27 23:06:41 jasone Exp $"; #endif extern int _rpc_dtablesize __P(( void )); #define NYEARS (unsigned long)(1970 - 1900) #define TOFFSET (unsigned long)(60*60*24*(365*NYEARS + (NYEARS/4))) static void do_close __P(( int )); int rtime(addrp, timep, timeout) struct sockaddr_in *addrp; struct timeval *timep; struct timeval *timeout; { int s; fd_set readfds; int res; unsigned long thetime; struct sockaddr_in from; int fromlen; int type; struct servent *serv; if (timeout == NULL) { type = SOCK_STREAM; } else { type = SOCK_DGRAM; } s = socket(AF_INET, type, 0); if (s < 0) { return(-1); } addrp->sin_family = AF_INET; /* TCP and UDP port are the same in this case */ if ((serv = getservbyname("time", "tcp")) == NULL) { return(-1); } addrp->sin_port = serv->s_port; if (type == SOCK_DGRAM) { res = sendto(s, (char *)&thetime, sizeof(thetime), 0, (struct sockaddr *)addrp, sizeof(*addrp)); if (res < 0) { do_close(s); return(-1); } do { FD_ZERO(&readfds); FD_SET(s, &readfds); res = select(_rpc_dtablesize(), &readfds, (fd_set *)NULL, (fd_set *)NULL, timeout); } while (res < 0 && errno == EINTR); if (res <= 0) { if (res == 0) { errno = ETIMEDOUT; } do_close(s); return(-1); } fromlen = sizeof(from); res = recvfrom(s, (char *)&thetime, sizeof(thetime), 0, (struct sockaddr *)&from, &fromlen); do_close(s); if (res < 0) { return(-1); } } else { if (connect(s, (struct sockaddr *)addrp, sizeof(*addrp)) < 0) { do_close(s); return(-1); } res = _read(s, (char *)&thetime, sizeof(thetime)); do_close(s); if (res < 0) { return(-1); } } if (res != sizeof(thetime)) { errno = EIO; return(-1); } thetime = ntohl(thetime); timep->tv_sec = thetime - TOFFSET; timep->tv_usec = 0; return(0); } static void do_close(s) int s; { int save; save = errno; (void)_close(s); errno = save; }
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