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.

1 files changed, 1 insertions, 4 deletions

diff --git a/sbin/adjkerntz/adjkerntz.c b/sbin/adjkerntz/adjkerntz.c
index 35d8da9d6c51..c42379d71915 100644
--- a/sbin/adjkerntz/adjkerntz.c
+++ b/sbin/adjkerntz/adjkerntz.c
@@ -315,10 +315,7 @@ recalculate:
 			 * restoring disrtcset, since we don't clean up
 			 * anything.
 			 */
-			if (gettimeofday(&tv, (struct timezone *)NULL)) {
-				syslog(LOG_ERR, "gettimeofday: %m");
-				return 1;
-			}
+			(void)gettimeofday(&tv, NULL);
 			tv.tv_sec += diff;
 			stv = &tv;
 		}