(_strftime_copytm): New function, to work around Solaris 2.5 tzset bug.

From Paul Eggert.

diff --git a/lib/strftime.c b/lib/strftime.c
index a1c9a39bb6550d8322319126ac5faf108b2a6033..649cdf431a85d5ffcc58ba6dbc5213000d045e0d 100644 (file)
--- a/lib/strftime.c
+++ b/lib/strftime.c
@@ -1,4 +1,4 @@
-/* Copyright (C) 1991, 92, 93, 94, 95, 96 Free Software Foundation, Inc.
+/* Copyright (C) 1991, 92, 93, 94, 95, 96, 97 Free Software Foundation, Inc.
 
    NOTE: The canonical source of this file is maintained with the GNU C
    Library.  Bugs can be reported to bug-glibc@prep.ai.mit.edu.
@@ -329,6 +329,30 @@ static char const month_name[][10] =
   };
 #endif
 
+
+#if !defined _LIBC && HAVE_TZNAME && HAVE_TZSET
+  /* Solaris 2.5 tzset sometimes modifies the storage returned by localtime.
+     Work around this bug by copying *tp before it might be munged.  */
+  size_t _strftime_copytm __P ((char *, size_t, const char *,
+                               const struct tm *));
+  size_t
+  strftime (s, maxsize, format, tp)
+      char *s;
+      size_t maxsize;
+      const char *format;
+      const struct tm *tp;
+  {
+    struct tm tmcopy;
+    tmcopy = *tp;
+    return _strftime_copytm (s, maxsize, format, &tmcopy);
+  }
+# ifdef strftime
+#  undef strftime
+# endif
+# define strftime _strftime_copytm
+#endif
+
+
 /* Write information from TP into S according to the format
    string FORMAT, writing no more that MAXSIZE characters
    (including the terminating '\0') and returning number of