4.115
Last change
on this file since c17d0b3 was
c17d0b3,
checked in by Sebastian Huber <sebastian.huber@…>, on 10/02/12 at 13:44:59
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Filesystem: Reject removal of root nodes
Reject the removal of file system instance root nodes in rmdir() and
unlink() and return the EBUSY error status. File system instances can
be removed with unmount(). Remove root node special cases in IMFS,
DOSFS, and RFS.
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-
Property mode set to
100644
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File size:
1.5 KB
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1 | /* |
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2 | * unlink() - POSIX 1003.1b - 5.5.1 - Remove an existing link |
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3 | * |
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4 | * COPYRIGHT (c) 1989-1999. |
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5 | * On-Line Applications Research Corporation (OAR). |
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6 | * |
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7 | * The license and distribution terms for this file may be |
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8 | * found in the file LICENSE in this distribution or at |
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9 | * http://www.rtems.com/license/LICENSE. |
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10 | */ |
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11 | |
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12 | #if HAVE_CONFIG_H |
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13 | #include "config.h" |
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14 | #endif |
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15 | |
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16 | #include <unistd.h> |
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17 | |
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18 | #include <rtems/libio_.h> |
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19 | |
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20 | int unlink( const char *path ) |
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21 | { |
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22 | int rv = 0; |
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23 | rtems_filesystem_eval_path_context_t ctx; |
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24 | int eval_flags = RTEMS_FS_REJECT_TERMINAL_DOT; |
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25 | rtems_filesystem_location_info_t parentloc; |
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26 | int parent_eval_flags = RTEMS_FS_PERMS_WRITE |
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27 | | RTEMS_FS_PERMS_EXEC |
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28 | | RTEMS_FS_FOLLOW_LINK; |
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29 | const rtems_filesystem_location_info_t *currentloc = |
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30 | rtems_filesystem_eval_path_start_with_parent( |
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31 | &ctx, |
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32 | path, |
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33 | eval_flags, |
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34 | &parentloc, |
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35 | parent_eval_flags |
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36 | ); |
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37 | |
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38 | if ( !rtems_filesystem_location_is_root( currentloc ) ) { |
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39 | const rtems_filesystem_operations_table *ops = currentloc->mt_entry->ops; |
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40 | |
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41 | rv = (*ops->rmnod_h)( &parentloc, currentloc ); |
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42 | } else { |
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43 | rtems_filesystem_eval_path_error( &ctx, EBUSY ); |
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44 | rv = -1; |
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45 | } |
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46 | |
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47 | rtems_filesystem_eval_path_cleanup_with_parent( &ctx, &parentloc ); |
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48 | |
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49 | return rv; |
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50 | } |
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51 | |
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52 | /* |
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53 | * _unlink_r |
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54 | * |
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55 | * This is the Newlib dependent reentrant version of unlink(). |
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56 | */ |
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57 | |
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58 | #if defined(RTEMS_NEWLIB) |
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59 | |
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60 | #include <reent.h> |
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61 | |
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62 | int _unlink_r( |
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63 | struct _reent *ptr __attribute__((unused)), |
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64 | const char *path |
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65 | ) |
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66 | { |
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67 | return unlink( path ); |
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68 | } |
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69 | #endif |
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