From 2bbe80583bb601cdca730a4aafebb5622b6dddc1 Mon Sep 17 00:00:00 2001
From: Chet Ramey <chet.ramey@case.edu>
Date: Tue, 22 Nov 2011 20:00:19 -0500
Subject: [PATCH] Bash-4.2 patch 5

---
 builtins/printf.def |  3 +++
 parse.y             |  3 +++
 patchlevel.h        |  2 +-
 variables.c         | 23 ++++++++++++++++++++---
 variables.h         |  1 +
 5 files changed, 28 insertions(+), 4 deletions(-)

diff --git a/builtins/printf.def b/builtins/printf.def
index 7892cb5..9eca215 100644
--- a/builtins/printf.def
+++ b/builtins/printf.def
@@ -465,6 +465,9 @@ printf_builtin (list)
 		  secs = shell_start_time;	/* roughly $SECONDS */
 		else
 		  secs = arg;
+#if defined (HAVE_TZSET)
+		sv_tz ("TZ");		/* XXX -- just make sure */
+#endif
 		tm = localtime (&secs);
 		n = strftime (timebuf, sizeof (timebuf), timefmt, tm);
 		free (timefmt);
diff --git a/parse.y b/parse.y
index b5c94e7..65ec86a 100644
--- a/parse.y
+++ b/parse.y
@@ -5135,6 +5135,9 @@ decode_prompt_string (string)
 	    case 'A':
 	      /* Make the current time/date into a string. */
 	      (void) time (&the_time);
+#if defined (HAVE_TZSET)
+	      sv_tz ("TZ");		/* XXX -- just make sure */
+#endif
 	      tm = localtime (&the_time);
 
 	      if (c == 'd')
diff --git a/patchlevel.h b/patchlevel.h
index 2b93e97..5cca30b 100644
--- a/patchlevel.h
+++ b/patchlevel.h
@@ -25,6 +25,6 @@
    regexp `^#define[ 	]*PATCHLEVEL', since that's what support/mkversion.sh
    looks for to find the patch level (for the sccs version string). */
 
-#define PATCHLEVEL 4
+#define PATCHLEVEL 5
 
 #endif /* _PATCHLEVEL_H_ */
diff --git a/variables.c b/variables.c
index 3c20c3c..daacdbf 100644
--- a/variables.c
+++ b/variables.c
@@ -3653,6 +3653,22 @@ n_shell_variables ()
   return n;
 }
 
+int
+chkexport (name)
+     char *name;
+{
+  SHELL_VAR *v;
+
+  v = find_variable (name);
+  if (exported_p (v))
+    {
+      array_needs_making = 1;
+      maybe_make_export_env ();
+      return 1;
+    }
+  return 0;
+}
+
 void
 maybe_make_export_env ()
 {
@@ -4214,7 +4230,7 @@ static struct name_and_function special_vars[] = {
   { "TEXTDOMAIN", sv_locale },
   { "TEXTDOMAINDIR", sv_locale },
 
-#if defined (HAVE_TZSET) && defined (PROMPT_STRING_DECODE)
+#if defined (HAVE_TZSET)
   { "TZ", sv_tz },
 #endif
 
@@ -4558,12 +4574,13 @@ sv_histtimefmt (name)
 }
 #endif /* HISTORY */
 
-#if defined (HAVE_TZSET) && defined (PROMPT_STRING_DECODE)
+#if defined (HAVE_TZSET)
 void
 sv_tz (name)
      char *name;
 {
-  tzset ();
+  if (chkexport (name))
+    tzset ();
 }
 #endif
 
diff --git a/variables.h b/variables.h
index 7041ca9..84e92bb 100644
--- a/variables.h
+++ b/variables.h
@@ -313,6 +313,7 @@ extern void set_func_auto_export __P((const char *));
 
 extern void sort_variables __P((SHELL_VAR **));
 
+extern int chkexport __P((char *));
 extern void maybe_make_export_env __P((void));
 extern void update_export_env_inplace __P((char *, int, char *));
 extern void put_command_name_into_env __P((char *));
-- 
2.7.4