Rework all non-contributed files that use `struct timezone'.

This structure is not part of POSIX. According to POSIX, gettimeofday()
has the following prototype:

	int gettimeofday(struct timeval *restrict tp, void *restrict tzp);

Also, POSIX states that gettimeofday() shall return 0 (as long as tzp is
not used). Remove dead error handling code. Also use NULL for a
nul-pointer instead of integer 0.

While there, change all pieces of code that only use tv_sec to use
time(3), as this provides less overhead.

2 files changed, 2 insertions, 2 deletions

diff --git a/lib/libc/rpc/auth_des.c b/lib/libc/rpc/auth_des.c
index 8f363e9..1b45c3b 100644
--- a/lib/libc/rpc/auth_des.c
+++ b/lib/libc/rpc/auth_des.c
@@ -286,7 +286,7 @@ authdes_marshal(AUTH *auth, XDR *xdrs)
 	 * Figure out the "time", accounting for any time difference
 	 * with the server if necessary.
 	 */
-	(void) gettimeofday(&ad->ad_timestamp, (struct timezone *)NULL);
+	(void)gettimeofday(&ad->ad_timestamp, NULL);
 	ad->ad_timestamp.tv_sec += ad->ad_timediff.tv_sec;
 	ad->ad_timestamp.tv_usec += ad->ad_timediff.tv_usec;
 	while (ad->ad_timestamp.tv_usec >= USEC_PER_SEC) {
diff --git a/lib/libc/rpc/svc_auth_des.c b/lib/libc/rpc/svc_auth_des.c
index de4d1b4..bd45f20 100644
--- a/lib/libc/rpc/svc_auth_des.c
+++ b/lib/libc/rpc/svc_auth_des.c
@@ -271,7 +271,7 @@ _svcauth_des(rqst, msg)
 			debug("timestamp before last seen");
 			return (AUTH_REJECTEDVERF);	/* replay */
 		}
-		(void) gettimeofday(&current, (struct timezone *)NULL);
+		(void)gettimeofday(&current, NULL);
 		current.tv_sec -= window;	/* allow for expiration */
 		if (!BEFORE(&current, &timestamp)) {
 			debug("timestamp expired");