4.104.114.84.95
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1 | /* |
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2 | * IMFS Node Removal Handler |
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3 | * |
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4 | * This file contains the handler used to remove a node when a file type |
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5 | * does not require special actions. |
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6 | * |
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7 | * COPYRIGHT (c) 1989-1999. |
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8 | * On-Line Applications Research Corporation (OAR). |
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9 | * |
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10 | * The license and distribution terms for this file may be |
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11 | * found in the file LICENSE in this distribution or at |
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12 | * http://www.OARcorp.com/rtems/license.html. |
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13 | * |
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14 | * $Id$ |
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15 | */ |
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16 | |
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17 | #include <rtems.h> |
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18 | #include <rtems/libio.h> |
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19 | #include "libio_.h" |
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20 | |
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21 | #include "imfs.h" |
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22 | |
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23 | /* |
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24 | * IMFS_rmnod |
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25 | */ |
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26 | |
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27 | int IMFS_rmnod( |
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28 | rtems_filesystem_location_info_t *pathloc /* IN */ |
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29 | ) |
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30 | { |
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31 | IMFS_jnode_t *the_jnode; |
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32 | |
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33 | the_jnode = (IMFS_jnode_t *) pathloc->node_access; |
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34 | |
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35 | /* |
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36 | * Take the node out of the parent's chain that contains this node |
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37 | */ |
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38 | |
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39 | if ( the_jnode->Parent != NULL ) { |
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40 | Chain_Extract( (Chain_Node *) the_jnode ); |
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41 | the_jnode->Parent = NULL; |
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42 | } |
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43 | |
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44 | /* |
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45 | * Decrement the link counter and see if we can free the space. |
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46 | */ |
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47 | |
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48 | the_jnode->st_nlink--; |
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49 | IMFS_update_ctime( the_jnode ); |
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50 | |
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51 | /* |
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52 | * The file cannot be open and the link must be less than 1 to free. |
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53 | */ |
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54 | |
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55 | if ( !rtems_libio_is_file_open( the_jnode ) && (the_jnode->st_nlink < 1) ) { |
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56 | |
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57 | /* |
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58 | * Is rtems_filesystem_current this node? |
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59 | */ |
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60 | |
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61 | if ( rtems_filesystem_current.node_access == pathloc->node_access ) |
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62 | rtems_filesystem_current.node_access = NULL; |
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63 | |
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64 | /* |
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65 | * Free memory associated with a memory file. |
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66 | */ |
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67 | |
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68 | free( the_jnode ); |
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69 | } |
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70 | |
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71 | return 0; |
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72 | |
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73 | } |
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74 | |
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75 | |
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76 | |
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