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/*
* Base file system initialization
*
* COPYRIGHT (c) 1989-1999.
* On-Line Applications Research Corporation (OAR).
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rtems.com/license/LICENSE.
*
* $Id$
*/
#if HAVE_CONFIG_H
#include "config.h"
#endif
#include <rtems.h>
#include <rtems/libio.h>
#include <rtems/libio_.h>
/*
* Global information for the base file system.
*/
rtems_user_env_t rtems_global_user_env;
rtems_user_env_t * rtems_current_user_env = &rtems_global_user_env;
/*
* Default mode for created files.
*/
/*
* rtems_filesystem_initialize
*
* Initialize the foundation of the file system. This is specified
* by the structure rtems_filesystem_mount_table. The usual
* configuration is a single instantiation of the IMFS or miniIMFS with
* a single "/dev" directory in it.
*/
void rtems_filesystem_initialize( void )
{
#if !defined(RTEMS_UNIX)
int status;
rtems_filesystem_mount_table_entry_t *entry;
rtems_filesystem_mount_table_t *mt;
rtems_filesystem_location_info_t loc;
/*
* Set the default umask to "022".
*/
rtems_filesystem_umask = 022;
init_fs_mount_table();
/*
* mount the first filesystem.
*/
if ( rtems_filesystem_mount_table_size == 0 )
rtems_fatal_error_occurred( 0xABCD0001 );
mt = &rtems_filesystem_mount_table[0];
status = mount(
&entry, mt->fs_ops, mt->fsoptions, mt->device, mt->mount_point );
if ( status == -1 )
rtems_fatal_error_occurred( 0xABCD0002 );
rtems_filesystem_link_counts = 0;
/* setup the 'current' and 'root' directories
*
* NOTE: cloning the pathlocs is not strictly
* necessary. Since we implicitely let
* all threads that don't call
* libio_set_private_env() share the same
* (initial) 'root' and 'current' locs,
* we (also implicitely) assume that the
* root filesystem doesn't care about
* reference counts.
* I just inserted the code snippet below
* to remind everybody of the fact by
* making it more explicit...
* Ideally, every thread would have to
* call either share_private_env() or
* set_private_env() - but then: that's
* gonna hit performance.
*
* Till Straumann, 10/25/2002
*/
rtems_filesystem_root = entry->mt_fs_root;
/* Clone the root pathloc */
rtems_filesystem_evaluate_path("/", 0, &loc, 0);
rtems_filesystem_root = loc;
/* One more clone for the current node */
rtems_filesystem_evaluate_path("/", 0, &loc, 0);
rtems_filesystem_current = loc;
/* Note: the global_env's refcnt doesn't matter
* as the global env is never released
*/
/*
* Traditionally RTEMS devices are under "/dev" so install this directory.
*
* If the mkdir() fails, we can't print anything so just fatal error.
*
* NOTE: UNIX root is 755 and owned by root/root (0/0). It is actually
* created that way by the IMFS.
*/
status = mkdir( "/dev", 0777);
if ( status != 0 )
rtems_fatal_error_occurred( 0xABCD0003 );
/*
* You can't mount another filesystem properly until the mount point
* it will be mounted onto is created. Moreover, if it is going to
* use a device, then it is REALLY unfair to attempt this
* before device drivers are initialized. So we return via a base
* filesystem image and nothing auto-mounted at this point.
*/
#endif
}
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