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Patch for SHMFS_SUPER_MAGIC


Linux pre6-3 contains a fix for statfs on shmfs so that we can use it
now.

I propose the appended patch.

I don't know if links work with that filesystem and therefore didn't
add anything to pathconf and fpathconf.

Andreas

2000-04-14  Andreas Jaeger  <aj@suse.de>

	* sysdeps/unix/sysv/linux/shm_open.c: Include linux_fsinfo for
	SHMFS_SUPER_MAGIC.  Remove definition of SHMFS_SUPER_MAGIC.

	* sysdeps/unix/sysv/linux/linux_fsinfo.h (SHMFS_SUPER_MAGIC): Added.

============================================================
Index: sysdeps/unix/sysv/linux/shm_open.c
--- sysdeps/unix/sysv/linux/shm_open.c	2000/04/12 06:08:07	1.2
+++ sysdeps/unix/sysv/linux/shm_open.c	2000/04/14 18:29:33
@@ -27,13 +27,8 @@
 #include <sys/mman.h>
 #include <sys/statfs.h>
 #include <bits/libc-lock.h>
+#include "linux_fsinfo.h"
 
-
-/* XXX Currently the Linux kernel sources do not define a super magic number
-   for the shmfs and the kernel assigns the value 0 to f_type.  */
-#ifndef SHMFS_SUPER_MAGIC
-# define SHMFS_SUPER_MAGIC	0
-#endif
 
 /* Mount point of the shared memory filesystem.  */
 static struct
============================================================
Index: sysdeps/unix/sysv/linux/linux_fsinfo.h
--- sysdeps/unix/sysv/linux/linux_fsinfo.h	1999/11/18 16:41:21	1.5
+++ sysdeps/unix/sysv/linux/linux_fsinfo.h	2000/04/14 18:29:33
@@ -1,5 +1,5 @@
 /* Constants from kernel header for various FSes.
-   Copyright (C) 1998, 1999 Free Software Foundation, Inc.
+   Copyright (C) 1998, 1999, 2000 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
@@ -97,6 +97,9 @@
 
 /* Constants that identify the `xenix' filesystem.  */
 #define XENIX_SUPER_MAGIC	0x012ff7b4
+
+/* Constant that identifies the `shm' filesystem.  */
+#define SHMFS_SUPER_MAGIC	0x02011994
 
 /* Maximum link counts.  */
 #define COH_LINK_MAX		10000

-- 
 Andreas Jaeger
  SuSE Labs aj@suse.de
   private aj@arthur.rhein-neckar.de
    currently: aj@oss.sgi.com
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