1 | /** |
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2 | * @file |
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3 | * |
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4 | * @brief Evaluate Patch |
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5 | * @ingroup DevFsDeviceTable Define Device Table Type |
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6 | */ |
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7 | |
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8 | /* |
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9 | * The license and distribution terms for this file may be |
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10 | * found in the file LICENSE in this distribution or at |
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11 | * http://www.rtems.org/license/LICENSE. |
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12 | */ |
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13 | |
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14 | #if HAVE_CONFIG_H |
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15 | #include "config.h" |
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16 | #endif |
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17 | |
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18 | #include <string.h> |
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19 | |
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20 | #include <rtems/devfs.h> |
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21 | |
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22 | static devFS_node *devFS_search_node( |
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23 | const devFS_data *data, |
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24 | const char *path, |
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25 | size_t pathlen, |
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26 | devFS_node **free_node_ptr |
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27 | ) |
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28 | { |
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29 | size_t i = 0; |
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30 | size_t n = data->count; |
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31 | devFS_node *nodes = data->nodes; |
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32 | devFS_node *node = NULL; |
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33 | devFS_node *free_node = NULL; |
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34 | |
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35 | for (i = 0; (free_node == NULL || node == NULL) && i < n; ++i) { |
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36 | devFS_node *current = nodes + i; |
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37 | |
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38 | if (current->name != NULL) { |
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39 | if ( |
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40 | current->namelen == pathlen |
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41 | && memcmp(current->name, path, pathlen) == 0 |
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42 | ) { |
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43 | node = current; |
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44 | } |
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45 | } else { |
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46 | free_node = current; |
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47 | } |
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48 | } |
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49 | |
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50 | *free_node_ptr = free_node; |
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51 | |
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52 | return node; |
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53 | } |
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54 | |
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55 | void devFS_eval_path( |
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56 | rtems_filesystem_eval_path_context_t *ctx |
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57 | ) |
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58 | { |
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59 | rtems_filesystem_location_info_t *currentloc = |
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60 | rtems_filesystem_eval_path_get_currentloc(ctx); |
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61 | devFS_node *free_node; |
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62 | devFS_node *node = devFS_search_node( |
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63 | devFS_get_data(currentloc), |
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64 | rtems_filesystem_eval_path_get_path(ctx), |
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65 | rtems_filesystem_eval_path_get_pathlen(ctx), |
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66 | &free_node |
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67 | ); |
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68 | int eval_flags = rtems_filesystem_eval_path_get_flags(ctx); |
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69 | |
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70 | if (node != NULL) { |
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71 | if ((eval_flags & RTEMS_FS_EXCLUSIVE) == 0) { |
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72 | currentloc->node_access = node; |
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73 | rtems_filesystem_eval_path_clear_path(ctx); |
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74 | } else { |
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75 | rtems_filesystem_eval_path_error(ctx, EEXIST); |
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76 | } |
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77 | } else { |
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78 | if ((eval_flags & RTEMS_FS_MAKE) != 0) { |
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79 | if (free_node != NULL) { |
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80 | free_node->mode = S_IRWXU | S_IRWXG | S_IRWXO; |
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81 | currentloc->node_access = free_node; |
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82 | rtems_filesystem_eval_path_set_token( |
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83 | ctx, |
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84 | rtems_filesystem_eval_path_get_path(ctx), |
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85 | rtems_filesystem_eval_path_get_pathlen(ctx) |
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86 | ); |
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87 | rtems_filesystem_eval_path_clear_path(ctx); |
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88 | } else { |
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89 | rtems_filesystem_eval_path_error(ctx, ENOSPC); |
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90 | } |
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91 | } else { |
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92 | rtems_filesystem_eval_path_error(ctx, ENOENT); |
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93 | } |
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94 | } |
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95 | } |
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