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, 4 insertions, 4 deletions

diff --git a/bin/date/date.c b/bin/date/date.c
index 1e9f281..58a9afb 100644
--- a/bin/date/date.c
+++ b/bin/date/date.c
@@ -137,7 +137,7 @@ main(int argc, char *argv[])
 	 * If -d or -t, set the timezone or daylight savings time; this
 	 * doesn't belong here; the kernel should not know about either.
 	 */
-	if (set_timezone && settimeofday((struct timeval *)NULL, &tz))
+	if (set_timezone && settimeofday(NULL, &tz) != 0)
 		err(1, "settimeofday (timezone)");
 
 	if (!rflag && time(&tval) == -1)
@@ -273,14 +273,14 @@ setthetime(const char *fmt, const char *p, int jflag, int nflag)
 		/* set the time */
 		if (nflag || netsettime(tval)) {
 			utx.ut_type = OLD_TIME;
-			gettimeofday(&utx.ut_tv, NULL);
+			(void)gettimeofday(&utx.ut_tv, NULL);
 			pututxline(&utx);
 			tv.tv_sec = tval;
 			tv.tv_usec = 0;
-			if (settimeofday(&tv, (struct timezone *)NULL))
+			if (settimeofday(&tv, NULL) != 0)
 				err(1, "settimeofday (timeval)");
 			utx.ut_type = NEW_TIME;
-			gettimeofday(&utx.ut_tv, NULL);
+			(void)gettimeofday(&utx.ut_tv, NULL);
 			pututxline(&utx);
 		}