Update.

* stdio-common/Makefile (tests): Add test-vfprintf.
	(test-vfprintf-ENV): New variable.
	* stdio-common/test-vfprintf.c: New file.

ChangeLog

@@ -1,5 +1,9 @@
 2000-11-18  Ulrich Drepper  <drepper@redhat.com>
 
+	* stdio-common/Makefile (tests): Add test-vfprintf.
+	(test-vfprintf-ENV): New variable.
+	* stdio-common/test-vfprintf.c: New file.
+
 	* wcsmbs/mbrtowc.c (__mbrtowc): Do not only flush if input is '\0'.
 
 	* wcsmbs/Makefile (tests): Add tst-mbrtowc and tst-wcrtomb.

stdio-common/Makefile

@@ -55,7 +55,7 @@ tests := tstscanf test_rdwr test-popen tstgetln test-fseek \
 	 tfformat tiformat tllformat tstdiomisc tst-printfsz tst-wc-printf \
 	 scanf1 scanf2 scanf3 scanf4 scanf5 scanf7 scanf8 scanf9 scanf10 \
 	 scanf12 tst-tmpnam tst-cookie tst-obprintf tst-sscanf tst-swprintf \
-	 tst-fseek tst-fmemopen
+	 tst-fseek tst-fmemopen test-vfprintf
 
 test-srcs = tst-unbputc tst-printf
 
@@ -83,6 +83,7 @@ CFLAGS-tst-printfsz.c = -Wno-format
 
 tst-sscanf-ENV = LOCPATH=$(common-objpfx)localedata
 tst-swprintf-ENV = LOCPATH=$(common-objpfx)localedata
+test-vfprintf-ENV = LOCPATH=$(common-objpfx)localedata
 
 $(inst_includedir)/bits/stdio_lim.h: $(common-objpfx)bits/stdio_lim.h
 	$(do-install)

stdio-common/test-vfprintf.c

@@ -0,0 +1,125 @@
+/* Tests of *printf for very large strings.
+   Copyright (C) 2000 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Ulrich Drepper <drepper@redhat.com>, 2000.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Library General Public License as
+   published by the Free Software Foundation; either version 2 of the
+   License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public
+   License along with the GNU C Library; see the file COPYING.LIB.  If not,
+   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
+
+#include <locale.h>
+#include <mcheck.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <sys/stat.h>
+
+
+const char *locs[] =
+{
+  "C", "de_DE.ISO-8859-1", "de_DE.UTF-8", "ja_JP.EUC-JP"
+};
+#define nlocs (sizeof (locs) / sizeof (locs[0]))
+
+
+char large[50000];
+
+int
+main (void)
+{
+  char buf[20];
+  int i;
+  int res = 0;
+  int fd;
+
+  mtrace ();
+
+  strcpy (buf, "test-vfprintfXXXXXX");
+  fd = mkstemp (buf);
+  if (fd == -1)
+    {
+      printf ("cannot open temporary file: %m\n");
+      exit (1);
+    }
+  unlink (buf);
+
+  for (i = 0; i < nlocs; ++i)
+    {
+      FILE *fp;
+      struct stat st;
+      int fd2;
+
+      setlocale (LC_ALL, locs[i]);
+
+      memset (large, '\1', sizeof (large));
+      large[sizeof (large) - 1] = '\0';
+
+      fd2 = dup (fd);
+      if (fd2 == -1)
+	{
+	  printf ("cannot dup for locale %s: %m\n",
+		  setlocale (LC_ALL, NULL));
+	  exit (1);
+	}
+
+      if (ftruncate (fd2, 0) != 0)
+	{
+	  printf ("cannot truncate file for locale %s: %m\n",
+		  setlocale (LC_ALL, NULL));
+	  exit (1);
+	}
+
+      fp = fdopen (fd2, "a");
+      if (fp == NULL)
+	{
+	  printf ("cannot create FILE for locale %s: %m\n",
+		  setlocale (LC_ALL, NULL));
+	  exit (1);
+	}
+
+      fprintf (fp, "%s", large);
+      fprintf (fp, "%.*s", 30000, large);
+      large[20000] = '\0';
+      fprintf (fp, large);
+
+      if (fflush (fp) != 0 || ferror (fp) != 0 || fclose (fp) != 0)
+	{
+	  printf ("write error for locale %s: %m\n",
+		  setlocale (LC_ALL, NULL));
+	  exit (1);
+	}
+
+      if (fstat (fd, &st) != 0)
+	{
+	  printf ("cannot stat for locale %s: %m\n",
+		  setlocale (LC_ALL, NULL));
+	  exit (1);
+	}
+      else if (st.st_size != 99999)
+	{
+	  printf ("file size incorrect for locale %s: %jd instead of %jd\n",
+		  setlocale (LC_ALL, NULL),
+		  (intmax_t) st.st_size, (intmax_t) 99999);
+	  res = 1;
+	}
+      else
+	printf ("locale %s OK\n", setlocale (LC_ALL, NULL));
+    }
+
+  close (fd);
+
+  return res;
+}