* libio/wstrops.c (_IO_wstr_underflow): Clear errno before

	returning WEOF.
	* stdio-common/Makefile (tests): Add bug18a.
	* stdio-common/bug18a.c: New file.

ChangeLog

@@ -1,5 +1,10 @@
 2007-07-07  Ulrich Drepper  <drepper@redhat.com>
 
+	* libio/wstrops.c (_IO_wstr_underflow): Clear errno before
+	returning WEOF.
+	* stdio-common/Makefile (tests): Add bug18a.
+	* stdio-common/bug18a.c: New file.
+
 	[BZ #4745]
 	* libio/strops.c (_IO_str_underflow): Clear errno before returning
 	EOF.

libio/wstrops.c

@@ -1,4 +1,5 @@
-/* Copyright (C) 1993,1997-1999,2001-2004, 2006 Free Software Foundation, Inc.
+/* Copyright (C) 1993,1997-1999,2001-2004,2006,2007
+   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
@@ -154,7 +155,12 @@ _IO_wstr_underflow (fp)
   if (fp->_wide_data->_IO_read_ptr < fp->_wide_data->_IO_read_end)
     return *fp->_wide_data->_IO_read_ptr;
   else
-    return WEOF;
+    {
+      /* We have to reset errno since callers check for errno being
+	 EINTR and there has been no such problem here.  */
+      __set_errno (0);
+      return WEOF;
+    }
 }
 
 

stdio-common/Makefile

@@ -54,7 +54,7 @@ tests := tstscanf test_rdwr test-popen tstgetln test-fseek \
 	 tst-swprintf tst-fseek tst-fmemopen test-vfprintf tst-gets \
 	 tst-perror tst-sprintf tst-rndseek tst-fdopen tst-fphex bug14 bug15 \
 	 tst-popen tst-unlockedio tst-fmemopen2 tst-put-error tst-fgets \
-	 tst-fwrite bug16 bug17 tst-swscanf tst-sprintf2 bug18
+	 tst-fwrite bug16 bug17 tst-swscanf tst-sprintf2 bug18 bug18a
 
 test-srcs = tst-unbputc tst-printf
 

stdio-common/bug18.c

@@ -2,6 +2,12 @@
 #include <errno.h>
 #include <stdio.h>
 
+#ifndef CHAR
+# define CHAR char
+# define L(str) str
+# define SSCANF sscanf
+#endif
+
 
 static int
 do_test (void)
@@ -11,11 +17,11 @@ do_test (void)
 
   printf("checking sscanf\n");
 
-  char str[] = "7-11";
+  CHAR str[] = L("7-11");
   int i, j, n;
 
   i = j = n = 0;
-  sscanf (str, " %i - %i %n", &i, &j, &n);
+  SSCANF (str, L(" %i - %i %n"), &i, &j, &n);
   printf ("found %i-%i (length=%i)\n", i, j, n);
 
   int result = 0;

stdio-common/bug18a.c

@@ -0,0 +1,6 @@
+#include <wchar.h>
+#define CHAR wchar_t
+#define L(str) L##str
+#define SSCANF swscanf
+
+#include "bug18.c"