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[/] [openrisc/] [trunk/] [rtos/] [rtems/] [c/] [src/] [lib/] [libc/] [imfs_fsunmount.c] - Rev 751
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/* * IMFS 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.OARcorp.com/rtems/license.html. * * $Id: imfs_fsunmount.c,v 1.2 2001-09-27 12:01:15 chris Exp $ */ #include <sys/types.h> /* for mkdir */ #include <fcntl.h> #include <unistd.h> #include <stdlib.h> #include <assert.h> #include "imfs.h" #include "libio_.h" #if defined(IMFS_DEBUG) #include <stdio.h> #endif /* * IMFS_fsunmount */ #define jnode_get_control( jnode ) \ (&jnode->info.directory.Entries) #define jnode_has_no_children( jnode ) \ Chain_Is_empty( jnode_get_control( jnode ) ) #define jnode_has_children( jnode ) \ ( ! jnode_has_no_children( jnode ) ) #define jnode_get_first_child( jnode ) \ ((IMFS_jnode_t *)( Chain_Head( jnode_get_control( jnode ) )->next)) int IMFS_fsunmount( rtems_filesystem_mount_table_entry_t *temp_mt_entry ) { IMFS_jnode_t *jnode; IMFS_jnode_t *next; rtems_filesystem_location_info_t loc; int result = 0; /* * Traverse tree that starts at the mt_fs_root and deallocate memory * associated memory space */ jnode = (IMFS_jnode_t *)temp_mt_entry->mt_fs_root.node_access; loc = temp_mt_entry->mt_fs_root; /* * Set this to null to indicate that it is being unmounted. */ temp_mt_entry->mt_fs_root.node_access = NULL; do { next = jnode->Parent; loc.node_access = (void *)jnode; IMFS_Set_handlers( &loc ); if ( jnode->type != IMFS_DIRECTORY ) { result = IMFS_unlink( &loc ); if (result != 0) return -1; jnode = next; } else if ( jnode_has_no_children( jnode ) ) { result = IMFS_unlink( &loc ); if (result != 0) return -1; jnode = next; } if ( jnode != NULL ) { if ( jnode->type == IMFS_DIRECTORY ) { if ( jnode_has_children( jnode ) ) jnode = jnode_get_first_child( jnode ); } } } while (jnode != NULL); return 0; }
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