[BZ #3944]

2007-02-08  Jakub Jelinek  <jakub@redhat.com>
	[BZ #3944]
	* time/strptime_l.c (__strptime_internal): Set have_mon for
	%b/%B/%h.  Set have_mon and have_mday if tm_mon and tm_mday
	have been computed from tm_yday and tm_year.  Don't crash
	in day_of_the_week or day_of_the_year if not have_mon
	and tm_mon contains bogus value.
	* time/Makefile (tests): Add tst-strptime3.
	* time/tst-strptime3.c: New test.

3 files changed, 66 insertions, 5 deletions

diff --git a/time/Makefile b/time/Makefile
index d93b84bb2f..8ce34e4565 100644
--- a/time/Makefile
+++ b/time/Makefile
@@ -1,4 +1,4 @@
-# Copyright (C) 1991-2003, 2004, 2005 Free Software Foundation, Inc.
+# Copyright (C) 1991-2003, 2004, 2005, 2007 Free Software Foundation, Inc.
 # This file is part of the GNU C Library.
 
 # The GNU C Library is free software; you can redistribute it and/or
@@ -35,7 +35,8 @@ distribute := datemsk
 
 tests	:= test_time clocktest tst-posixtz tst-strptime tst_wcsftime \
 	   tst-getdate tst-mktime tst-mktime2 tst-ftime_l tst-strftime \
-	   tst-mktime3 tst-strptime2 bug-asctime bug-asctime_r bug-mktime1
+	   tst-mktime3 tst-strptime2 bug-asctime bug-asctime_r bug-mktime1 \
+	   tst-strptime3
 
 include ../Rules
 
diff --git a/time/strptime_l.c b/time/strptime_l.c
index dc0cc686fd..443a6fa88e 100644
--- a/time/strptime_l.c
+++ b/time/strptime_l.c
@@ -1,4 +1,4 @@
-/* Copyright (C) 2002, 2004, 2005 Free Software Foundation, Inc.
+/* Copyright (C) 2002, 2004, 2005, 2007 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
@@ -400,6 +400,7 @@ __strptime_internal (rp, fmt, tm, decided, era_cnt LOCALE_PARAM)
 	    /* Does not match a month name.  */
 	    return NULL;
 	  tm->tm_mon = cnt;
+	  have_mon = 1;
 	  want_xday = 1;
 	  break;
 	case 'c':
@@ -1085,11 +1086,15 @@ __strptime_internal (rp, fmt, tm, decided, era_cnt LOCALE_PARAM)
 	      tm->tm_mday =
 		(tm->tm_yday
 		 - __mon_yday[__isleap(1900 + tm->tm_year)][t_mon - 1] + 1);
+	  have_mon = 1;
+	  have_mday = 1;
 	}
-      day_of_the_week (tm);
+      /* Don't crash in day_of_the_week if tm_mon is uninitialized.  */
+      if (have_mon || (unsigned) tm->tm_mon <= 11)
+	day_of_the_week (tm);
     }
 
-  if (want_xday && !have_yday)
+  if (want_xday && !have_yday && (have_mon || (unsigned) tm->tm_mon <= 11))
     day_of_the_year (tm);
 
   if ((have_uweek || have_wweek) && have_wday)
diff --git a/time/tst-strptime3.c b/time/tst-strptime3.c
new file mode 100644
index 0000000000..9a8c6485e7
--- /dev/null
+++ b/time/tst-strptime3.c
@@ -0,0 +1,55 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <time.h>
+
+
+int
+main (void)
+{
+  int result = 0;
+  struct tm tm;
+
+  memset (&tm, 0xaa, sizeof (tm));
+
+  /* Test we don't crash on uninitialized struct tm.
+     Some fields might contain bogus values until everything
+     needed is initialized, but we shouldn't crash.  */
+  if (strptime ("2007", "%Y", &tm) == NULL
+      || strptime ("12", "%d", &tm) == NULL
+      || strptime ("Feb", "%b", &tm) == NULL
+      || strptime ("13", "%M", &tm) == NULL
+      || strptime ("21", "%S", &tm) == NULL
+      || strptime ("16", "%H", &tm) == NULL)
+    {
+      puts ("strptimes failed");
+      result = 1;
+    }
+
+  if (tm.tm_sec != 21 || tm.tm_min != 13 || tm.tm_hour != 16
+      || tm.tm_mday != 12 || tm.tm_mon != 1 || tm.tm_year != 107
+      || tm.tm_wday != 1 || tm.tm_yday != 42)
+    {
+      puts ("unexpected tm content");
+      result = 1;
+    }
+
+  if (strptime ("8", "%d", &tm) == NULL)
+    {
+      puts ("strptime failed");
+      result = 1;
+    }
+
+  if (tm.tm_sec != 21 || tm.tm_min != 13 || tm.tm_hour != 16
+      || tm.tm_mday != 8 || tm.tm_mon != 1 || tm.tm_year != 107
+      || tm.tm_wday != 4 || tm.tm_yday != 38)
+    {
+      puts ("unexpected tm content");
+      result = 1;
+    }
+
+  if (result == 0)
+    puts ("all OK");
+
+  return 0;
+}