commit 715a900c9085907fa749589bf738b192b1a2bda5
Author: Jeff Law <law@redhat.com>
Date:   Fri Sep 28 12:48:42 2012 -0600

    2012-09-28  Andreas Schwab  <schwab@linux-m68k.org>
    
            [BZ #6530]
            * stdio-common/vfprintf.c (process_string_arg): Revert
            2000-07-22 change.
    
    2011-09-28  Jonathan Nieder  <jrnieder@gmail.com>
    
            * stdio-common/Makefile (tst-sprintf-ENV): Set environment
            for testcase.
            * stdio-common/tst-sprintf.c: Include <locale.h>
            (main): Test sprintf's handling of incomplete multibyte
            characters.

diff --git a/stdio-common/Makefile b/stdio-common/Makefile
index 0cdf630..5e2e48d 100644
--- a/stdio-common/Makefile
+++ b/stdio-common/Makefile
@@ -116,6 +116,7 @@ CFLAGS-scanf17.c = -I../libio -I../stdlib -I../wcsmbs -I../time -I../string \
 
 # We know the test has a format string problem.
 CFLAGS-tst-sprintf.c = -Wno-format
+tst-sprintf-ENV = LOCPATH=$(common-objpfx)localedata
 tst-sscanf-ENV = LOCPATH=$(common-objpfx)localedata
 tst-swprintf-ENV = LOCPATH=$(common-objpfx)localedata
 test-vfprintf-ENV = LOCPATH=$(common-objpfx)localedata
diff --git a/stdio-common/tst-sprintf.c b/stdio-common/tst-sprintf.c
index c04fef1..c4e911f 100644
--- a/stdio-common/tst-sprintf.c
+++ b/stdio-common/tst-sprintf.c
@@ -1,5 +1,6 @@
 #include <stdio.h>
 #include <stdlib.h>
+#include <locale.h>
 #include <string.h>
 #include <gnu/option-groups.h>
 
@@ -58,5 +59,17 @@ main (void)
       result = 1;
     }
 
+  if (setlocale (LC_ALL, "de_DE.UTF-8") == NULL)
+    {
+      puts ("cannot set locale");
+      result = 1;
+    }
+  else if (sprintf (buf, "%.8s\n", "Foo: \277") != 7
+	   || strcmp (buf, "Foo: \277\n") != 0)
+    {
+      printf ("sprintf (buf, \"%%.8s\\n\", \"Foo: \\277\") produced '%s' output\n", buf);
+      result = 1;
+    }
+
   return result;
 }
diff --git a/stdio-common/vfprintf.c b/stdio-common/vfprintf.c
index d569034..17d3f42 100644
--- a/stdio-common/vfprintf.c
+++ b/stdio-common/vfprintf.c
@@ -1187,42 +1187,9 @@
 	else if (!is_long && spec != L_('S'))				      \
 	  {								      \
 	    if (prec != -1)						      \
-	      {								      \
-		/* Search for the end of the string, but don't search past    \
-		   the length (in bytes) specified by the precision.  Also    \
-		   don't use incomplete characters.  */			      \
-		if (! LOCALE_SUPPORT                                          \
-                    ||_NL_CURRENT_WORD (LC_CTYPE, _NL_CTYPE_MB_CUR_MAX) == 1) \
-		  len = __strnlen (string, prec);			      \
-		else							      \
-		  {							      \
-		    /* In case we have a multibyte character set the	      \
-		       situation is more complicated.  We must not copy	      \
-		       bytes at the end which form an incomplete character. */\
-		    size_t ignore_size = (unsigned) prec > 1024 ? 1024 : prec;\
-		    wchar_t ignore[ignore_size];			      \
-		    const char *str2 = string;				      \
-		    const char *strend = string + prec;			      \
-		    if (strend < string)				      \
-		      strend = (const char *) UINTPTR_MAX;		      \
-									      \
-		    mbstate_t ps;					      \
-		    memset (&ps, '\0', sizeof (ps));			      \
-									      \
-		    while (str2 != NULL && str2 < strend)		      \
-		      if (__mbsnrtowcs (ignore, &str2, strend - str2,	      \
-					ignore_size, &ps) == (size_t) -1)     \
-			{						      \
-			  done = -1;					      \
-			  goto all_done;				      \
-			}						      \
-									      \
-		    if (str2 == NULL)					      \
-		      len = strlen (string);				      \
-		    else						      \
-		      len = str2 - string - (ps.__count & 7);		      \
-		  }							      \
-	      }								      \
+	      /* Search for the end of the string, but don't search past      \
+		 the length (in bytes) specified by the precision.  */	      \
+	      len = __strnlen (string, prec);				      \
 	    else							      \
 	      len = strlen (string);					      \
 	  }								      \