4.104.114.84.95
Line | |
---|
1 | /* |
---|
2 | * IMFS_unmount |
---|
3 | * |
---|
4 | * This routine will look at a mount table entry that we are going to |
---|
5 | * add to the mount table. If the mount point |
---|
6 | * rtems_filesystem_location_info_t struct refers to a node that is a |
---|
7 | * directory that has a file system mounted on it, the node will be |
---|
8 | * marked as a mount point by * setting its directory.mt_fs pointer |
---|
9 | * to NULL. This indicates that a directory is no longer mounted on |
---|
10 | * this node. |
---|
11 | * |
---|
12 | * COPYRIGHT (c) 1989-1999. |
---|
13 | * On-Line Applications Research Corporation (OAR). |
---|
14 | * |
---|
15 | * The license and distribution terms for this file may be |
---|
16 | * found in the file LICENSE in this distribution or at |
---|
17 | * http://www.OARcorp.com/rtems/license.html. |
---|
18 | * |
---|
19 | * $Id$ |
---|
20 | */ |
---|
21 | |
---|
22 | #include <errno.h> |
---|
23 | |
---|
24 | #include "imfs.h" |
---|
25 | #include "libio_.h" |
---|
26 | |
---|
27 | int IMFS_unmount( |
---|
28 | rtems_filesystem_mount_table_entry_t *mt_entry |
---|
29 | ) |
---|
30 | { |
---|
31 | IMFS_jnode_t *node; |
---|
32 | |
---|
33 | node = mt_entry->mt_point_node.node_access; |
---|
34 | |
---|
35 | /* |
---|
36 | * Is the node that we are mounting onto a directory node ? |
---|
37 | */ |
---|
38 | |
---|
39 | if ( node->type != IMFS_DIRECTORY ) |
---|
40 | set_errno_and_return_minus_one( ENOTDIR ); |
---|
41 | |
---|
42 | /* |
---|
43 | * Did the node indicate that there was a directory mounted here? |
---|
44 | */ |
---|
45 | |
---|
46 | if ( node->info.directory.mt_fs == NULL ) |
---|
47 | set_errno_and_return_minus_one( EINVAL ); /* XXX */ |
---|
48 | |
---|
49 | /* |
---|
50 | * Set the mt_fs pointer to indicate that there is no longer |
---|
51 | * a file system mounted to this point. |
---|
52 | */ |
---|
53 | |
---|
54 | node->info.directory.mt_fs = NULL; |
---|
55 | |
---|
56 | return 0; |
---|
57 | } |
---|
Note: See
TracBrowser
for help on using the repository browser.