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-rw-r--r--sunrpc/rtime.c146
1 files changed, 146 insertions, 0 deletions
diff --git a/sunrpc/rtime.c b/sunrpc/rtime.c
new file mode 100644
index 0000000..baaced0
--- /dev/null
+++ b/sunrpc/rtime.c
@@ -0,0 +1,146 @@
+#if defined(LIBC_SCCS) && !defined(lint)
+static char sccsid[] = "@(#)rtime.c 2.2 88/08/10 4.0 RPCSRC; from 1.8 88/02/08 SMI";
+#endif
+/*
+ * 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 <stdio.h>
+#include <unistd.h>
+#include <rpc/rpc.h>
+#include <rpc/clnt.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <sys/time.h>
+#include <rpc/auth_des.h>
+#include <errno.h>
+#include <netinet/in.h>
+
+#define NYEARS (u_long)(1970 - 1900)
+#define TOFFSET (u_long)(60*60*24*(365*NYEARS + (NYEARS/4)))
+
+static void do_close (int);
+
+static void
+do_close (int s)
+{
+ int save;
+
+ save = errno;
+ close (s);
+ __set_errno (save);
+}
+
+int
+rtime (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;
+
+ 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;
+ addrp->sin_port = htons (IPPORT_TIMESERVER);
+ 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, (void *) NULL,
+ (void *) NULL, timeout);
+ }
+ while (res < 0 && errno == EINTR);
+ if (res <= 0)
+ {
+ if (res == 0)
+ __set_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))
+ {
+ __set_errno (EIO);
+ return -1;
+ }
+ thetime = ntohl (thetime);
+ timep->tv_sec = thetime - TOFFSET;
+ timep->tv_usec = 0;
+ return 0;
+}