From 9827ca52b9f69d29f3bc3c74a8ca95e14ee226ff Mon Sep 17 00:00:00 2001
From: Ken Hornstein <kenh@pobox.com>
Date: Mon, 9 Jan 2012 14:43:35 -0500
Subject: [PATCH] Clean up time handling; always assume we have tzset() and
 that the right prototypes are in time.h (both are valid in
 POSIX).

---
 configure.ac |   16 ++--------------
 sbr/dtime.c  |   33 ++-------------------------------
 2 files changed, 4 insertions(+), 45 deletions(-)

diff --git a/configure.ac b/configure.ac
index 5ff1829..0df49ba 100644
--- a/configure.ac
+++ b/configure.ac
@@ -462,7 +462,6 @@ esac
 AC_SUBST(OURDEFS)
 
 AC_HEADER_STDC
-AC_HEADER_TIME
 AC_HEADER_TIOCGWINSZ
 AC_CHECK_HEADERS(errno.h fcntl.h crypt.h termcap.h \
                  langinfo.h wchar.h wctype.h iconv.h netdb.h \
@@ -487,7 +486,7 @@ AC_CHECK_HEADER([sys/ptem.h], AC_DEFINE(WINSIZE_IN_PTEM,1,
 dnl ---------------
 dnl CHECK FUNCTIONS
 dnl ---------------
-AC_CHECK_FUNCS(writev lstat tzset getutent nl_langinfo)
+AC_CHECK_FUNCS(writev lstat getutent nl_langinfo)
 
 dnl Check for multibyte character set support
 if test "x$ac_cv_header_wchar_h" = "xyes" -a "x$ac_cv_header_wctype_h" = "xyes" \
@@ -744,18 +743,7 @@ dnl ----------------
 dnl CHECK STRUCTURES
 dnl ----------------
 
-AC_CHECK_MEMBERS(struct tm.tm_gmtoff,,,
-  [#ifdef TIME_WITH_SYS_TIME
-# include <sys/time.h>
-# include <time.h>
-#else
-# ifdef TM_IN_SYS_TIME
-#  include <sys/time.h>
-# else
-#  include <time.h>
-# endif
-#endif])
-
+AC_CHECK_MEMBERS([struct tm.tm_gmtoff],,,[#include <time.h>])
 AC_CHECK_MEMBERS(struct utmp.ut_type,,,[#include <utmp.h>])
 
 AC_STRUCT_DIRENT_D_TYPE
diff --git a/sbr/dtime.c b/sbr/dtime.c
index 2e978d7..5d5375d 100644
--- a/sbr/dtime.c
+++ b/sbr/dtime.c
@@ -10,23 +10,9 @@
 #include <h/mh.h>   /* for snprintf() */
 #include <h/nmh.h>
 #include <h/tws.h>
+#include <time.h>
 
-#if !defined(HAVE_STRUCT_TM_TM_GMTOFF) && !defined(HAVE_TZSET)
-# include <sys/timeb.h>
-#endif
-
-#ifdef TIME_WITH_SYS_TIME
-# include <sys/time.h>
-# include <time.h>
-#else
-# ifdef HAVE_SYS_TIME_H
-# include <sys/time.h>
-# else
-#  include <time.h>
-# endif
-#endif
-
-#if !defined(HAVE_STRUCT_TM_TM_GMTOFF) && defined(HAVE_TZSET)
+#if !defined(HAVE_STRUCT_TM_TM_GMTOFF)
 extern int daylight;
 extern long timezone;
 extern char *tzname[];
@@ -140,10 +126,6 @@ dlocaltime (time_t *clock)
     static struct tws tw;
     struct tm *tm;
 
-#if !defined(HAVE_STRUCT_TM_TM_GMTOFF) && !defined(HAVE_TZSET)
-    struct timeb tb;
-#endif
-
     if (!clock)
 	return NULL;
 
@@ -172,13 +154,8 @@ dlocaltime (time_t *clock)
     if (tm->tm_isdst)			/* if DST is in effect */
 	tw.tw_zone -= 60;		/* reset to normal offset */
 #else
-# ifdef HAVE_TZSET
     tzset();
     tw.tw_zone = -(timezone / 60);
-# else
-    ftime (&tb);
-    tw.tw_zone = -tb.timezone;
-# endif
 #endif
 
     tw.tw_flags &= ~TW_SDAY;
@@ -368,14 +345,8 @@ dtimezone (int offset, int flags)
     }
 
     if (!(flags & TW_ZONE) && mins == 0) {
-#if defined(HAVE_TZSET) && defined(HAVE_TZNAME)
 	tzset();
 	return ((flags & TW_DST) ? tzname[1] : tzname[0]);
-#else
-	for (z = zones; z->std; z++)
-	    if (z->shift == hours)
-		return (z->dst && (flags & TW_DST) ? z->dst : z->std);
-#endif
     }
 
 #ifdef ADJUST_NUMERIC_ONLY_TZ_OFFSETS_WRT_DST
-- 
1.7.10.4