[07a3253d] | 1 | /* |
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| 2 | * IMFS_rmnod |
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| 3 | * |
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| 4 | * This routine is available from the optable to remove a node |
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| 5 | * from the IMFS file system. |
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| 6 | * |
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| 7 | * COPYRIGHT (c) 1989-1998. |
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| 8 | * On-Line Applications Research Corporation (OAR). |
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| 9 | * Copyright assigned to U.S. Government, 1994. |
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| 10 | * |
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| 11 | * The license and distribution terms for this file may be |
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| 12 | * found in the file LICENSE in this distribution or at |
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| 13 | * http://www.OARcorp.com/rtems/license.html. |
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| 14 | * |
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| 15 | * $Id$ |
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| 16 | */ |
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| 17 | |
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| 18 | #include <errno.h> |
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| 19 | #include "libio_.h" |
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| 20 | #include "imfs.h" |
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| 21 | |
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| 22 | |
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| 23 | int IMFS_rmnod( |
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| 24 | rtems_filesystem_location_info_t *pathloc /* IN */ |
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| 25 | ) |
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| 26 | { |
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| 27 | IMFS_jnode_t *the_jnode; |
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| 28 | |
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| 29 | the_jnode = (IMFS_jnode_t *) pathloc->node_access; |
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| 30 | |
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| 31 | if ( the_jnode->type == IMFS_DIRECTORY ) { |
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| 32 | |
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| 33 | /* |
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| 34 | * You cannot remove a node that still has children |
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| 35 | */ |
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| 36 | |
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| 37 | if ( ! Chain_Is_empty( &the_jnode->info.directory.Entries ) ) |
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| 38 | set_errno_and_return_minus_one( ENOTEMPTY ); |
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| 39 | |
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| 40 | /* |
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| 41 | * You cannot remove the file system root node. |
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| 42 | */ |
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| 43 | |
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| 44 | if ( pathloc->mt_entry->mt_fs_root.node_access == pathloc->node_access ) |
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| 45 | set_errno_and_return_minus_one( EBUSY ); |
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| 46 | |
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| 47 | /* |
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| 48 | * You cannot remove a mountpoint. |
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| 49 | */ |
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| 50 | |
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| 51 | if ( the_jnode->info.directory.mt_fs != NULL ) |
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| 52 | set_errno_and_return_minus_one( EBUSY ); |
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| 53 | } |
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| 54 | |
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| 55 | /* |
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| 56 | * Take the node out of the parent's chain that contains this node |
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| 57 | */ |
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[a6883c4] | 58 | |
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[07a3253d] | 59 | if ( the_jnode->Parent != NULL ) { |
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| 60 | Chain_Extract( (Chain_Node *) the_jnode ); |
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| 61 | the_jnode->Parent = NULL; |
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| 62 | } |
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| 63 | |
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| 64 | /* |
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| 65 | * Decrement the link counter and see if we can free the space. |
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| 66 | */ |
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| 67 | |
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| 68 | the_jnode->st_nlink--; |
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| 69 | IMFS_update_ctime( the_jnode ); |
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| 70 | |
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| 71 | /* |
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| 72 | * The file cannot be open and the link must be less than 1 to free. |
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| 73 | */ |
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| 74 | |
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| 75 | if ( !rtems_libio_is_file_open( the_jnode ) && (the_jnode->st_nlink < 1) ) { |
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| 76 | |
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| 77 | /* |
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| 78 | * Is the rtems_filesystem_current is this node? |
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| 79 | */ |
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| 80 | |
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| 81 | if ( rtems_filesystem_current.node_access == pathloc->node_access ) |
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| 82 | rtems_filesystem_current.node_access = NULL; |
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| 83 | |
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| 84 | /* |
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| 85 | * Free memory associated with a memory file. |
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| 86 | */ |
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| 87 | |
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| 88 | if ( the_jnode->type == IMFS_MEMORY_FILE ) |
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| 89 | IMFS_memfile_remove( the_jnode ); |
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| 90 | |
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| 91 | free( the_jnode ); |
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| 92 | } |
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| 93 | |
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| 94 | return 0; |
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| 95 | |
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| 96 | } |
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| 97 | |
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| 98 | |
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