Update.

* libio/iofclose.c (_IO_new_fclose): Detect new streams and handle
	them appropriately.
	* libio/oldiofclose.c (_IO_old_fclose): Likewise.

ChangeLog

@@ -1,5 +1,9 @@
 1999-07-25  Ulrich Drepper  <drepper@cygnus.com>
 
+	* libio/iofclose.c (_IO_new_fclose): Detect new streams and handle
+	them appropriately.
+	* libio/oldiofclose.c (_IO_old_fclose): Likewise.
+
 	* misc/mntent_r.c: Allow spaces and tabs in entry names by
 	encoding these characters.
 	* misc/tst-mntent.c: Add test case for addmntent and getmntent.

FAQ

@@ -41,6 +41,9 @@ please let me know.
 1.15.	What's the problem with configure --enable-omitfp?
 1.16.	I get failures during `make check'.  What should I do?
 1.17.	What is symbol versioning good for?  Do I need it?
+1.18.	How can I compile on my fast ix86 machine a working libc for my slow
+	i386?  After installing libc, programs abort with "Illegal
+	Instruction".
 
 2. Installation and configuration issues
 
@@ -514,6 +517,23 @@ compatibility - forever!  The binary compatibility you lose is not only
 against the previous version of the GNU libc (version 2.0) but also against
 all future versions.
 
+
+1.18.	How can I compile on my fast ix86 machine a working libc for my slow
+	i386?  After installing libc, programs abort with "Illegal
+	Instruction".
+
+{AJ} glibc and gcc might generate some instructions on your machine that
+aren't available on i386.  You've got to tell glibc that you're configuring
+for i386 with adding i386 as your machine, for example:
+
+	../configure --prefix=/usr i386-pc-linux-gnu
+
+And you need to tell gcc to only generate i386 code, just add `-mcpu=i386'
+(just -m386 doesn't work) to your CFLAGS.
+
+{UD} This applies not only to the i386.  Compiling on a i686 for any older
+model will also fail if the above  methods are not used.
+
 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 
 

libio/iofclose.c

@@ -1,4 +1,4 @@
-/* Copyright (C) 1993, 1995, 1997, 1998 Free Software Foundation, Inc.
+/* Copyright (C) 1993, 1995, 1997, 1998, 1999 Free Software Foundation, Inc.
    This file is part of the GNU IO Library.
 
    This library is free software; you can redistribute it and/or
@@ -36,6 +36,12 @@ _IO_new_fclose (fp)
 
   CHECK_FILE(fp, EOF);
 
+  /* We desperately try to help programs which are using streams in a
+     strange way and mix old and new functions.  Detect old streams
+     here.  */
+  if (fp->_vtable_offset != 0)
+    return _IO_old_fclose (fp);
+
   _IO_cleanup_region_start ((void (*) __P ((void *))) _IO_funlockfile, fp);
   _IO_flockfile (fp);
   if (fp->_IO_file_flags & _IO_IS_FILEBUF)

libio/oldiofclose.c

@@ -37,6 +37,12 @@ _IO_old_fclose (fp)
 
   CHECK_FILE(fp, EOF);
 
+  /* We desperately try to help programs which are using streams in a
+     strange way and mix old and new functions.  Detect new streams
+     here.  */
+  if (fp->_vtable_offset == 0)
+    return _IO_new_fclose (fp);
+
   _IO_cleanup_region_start ((void (*) __P ((void *))) _IO_funlockfile, fp);
   _IO_flockfile (fp);
   if (fp->_IO_file_flags & _IO_IS_FILEBUF)

manual/sysinfo.texi

@@ -495,6 +495,14 @@ a pointer to a static variable of type @code{struct mntent} which is
 filled with the information from the next entry from the file currently
 read.
 
+The file format used prescribes the use of spaces or tab characters to
+separate the fields.  This makes it harder to use name containing one of
+these characters (e.g., mount points using spaces).  Therefore these
+characters are encoded in the files and the @code{getmntent} function
+takes care of the decoding while reading the entries back in.
+@code{'\040'} is used to encode a space character, @code{'\012'} to
+encode a tab character and @code{'\\'} to encode a backslash.
+
 If there was an error or the end of the file is reached the return value
 is @code{NULL}.
 
@@ -514,6 +522,9 @@ pointed to by the @var{result} parameter.  Additional information (e.g.,
 the strings pointed to by the elements of the result) are kept in the
 buffer of size @var{bufsize} pointed to by @var{buffer}.
 
+Escaped characters (space, tab, backslash) are converted back in the
+same way as it happens for @code{getmentent}.
+
 The function returns a @code{NULL} pointer in error cases.  Errors could be:
 @itemize @bullet
 @item
@@ -539,6 +550,10 @@ to create a new file while leaving out the entry to be removed and after
 closing the file remove the old one and rename the new file to the
 chosen name.
 
+This function takes care of spaces and tab characters in the names to be
+written to the file.  It converts them and the backslash character into
+the format describe in the @code{getmntent} description above.
+
 This function returns @math{0} in case the operation was successful.
 Otherwise the return value is @math{1} and @code{errno} is set
 appropriately.