1 | /* SPDX-License-Identifier: BSD-2-Clause */ |
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2 | |
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3 | /** |
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4 | * @file |
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5 | * |
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6 | * @brief Remove an Existing Link |
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7 | * @ingroup libcsupport |
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8 | */ |
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9 | |
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10 | /* |
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11 | * COPYRIGHT (c) 1989-1999. |
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12 | * On-Line Applications Research Corporation (OAR). |
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13 | * |
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14 | * Redistribution and use in source and binary forms, with or without |
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15 | * modification, are permitted provided that the following conditions |
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16 | * are met: |
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17 | * 1. Redistributions of source code must retain the above copyright |
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18 | * notice, this list of conditions and the following disclaimer. |
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19 | * 2. Redistributions in binary form must reproduce the above copyright |
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20 | * notice, this list of conditions and the following disclaimer in the |
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21 | * documentation and/or other materials provided with the distribution. |
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22 | * |
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23 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
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24 | * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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25 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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26 | * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE |
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27 | * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
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28 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
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29 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
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30 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
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31 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
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32 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
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33 | * POSSIBILITY OF SUCH DAMAGE. |
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34 | */ |
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35 | |
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36 | #ifdef HAVE_CONFIG_H |
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37 | #include "config.h" |
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38 | #endif |
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39 | |
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40 | #include <unistd.h> |
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41 | |
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42 | #include <rtems/libio_.h> |
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43 | |
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44 | /** |
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45 | * POSIX 1003.1b - 5.5.1 - Remove an existing link |
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46 | */ |
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47 | int unlink( const char *path ) |
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48 | { |
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49 | int rv = 0; |
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50 | rtems_filesystem_eval_path_context_t ctx; |
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51 | int eval_flags = RTEMS_FS_REJECT_TERMINAL_DOT; |
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52 | rtems_filesystem_location_info_t parentloc; |
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53 | int parent_eval_flags = RTEMS_FS_PERMS_WRITE |
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54 | | RTEMS_FS_PERMS_EXEC |
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55 | | RTEMS_FS_FOLLOW_LINK; |
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56 | const rtems_filesystem_location_info_t *currentloc = |
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57 | rtems_filesystem_eval_path_start_with_parent( |
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58 | &ctx, |
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59 | path, |
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60 | eval_flags, |
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61 | &parentloc, |
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62 | parent_eval_flags |
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63 | ); |
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64 | |
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65 | if ( !rtems_filesystem_location_is_instance_root( currentloc ) ) { |
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66 | const rtems_filesystem_operations_table *ops = currentloc->mt_entry->ops; |
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67 | |
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68 | rv = (*ops->rmnod_h)( &parentloc, currentloc ); |
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69 | } else { |
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70 | rtems_filesystem_eval_path_error( &ctx, EBUSY ); |
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71 | rv = -1; |
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72 | } |
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73 | |
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74 | rtems_filesystem_eval_path_cleanup_with_parent( &ctx, &parentloc ); |
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75 | |
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76 | return rv; |
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77 | } |
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78 | |
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79 | #if defined(RTEMS_NEWLIB) |
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80 | |
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81 | #include <reent.h> |
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82 | |
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83 | /** |
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84 | * This is the Newlib dependent reentrant version of unlink(). |
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85 | */ |
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86 | int _unlink_r( |
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87 | struct _reent *ptr RTEMS_UNUSED, |
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88 | const char *path |
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89 | ) |
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90 | { |
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91 | return unlink( path ); |
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92 | } |
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93 | #endif |
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