1 | /* create an entry for the file name.ext in parent directory */
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2 | WorkingDirectory *create_file_entry(const char *name, const char *ext,
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3 | WorkingDirectory *parent, BYTE attributes)
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4 | {
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5 | BYTE buf[SECTORSIZE];
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6 | WorkingDirectory *wd;
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7 | int de;
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8 | UINT32 firstcluster;
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9 | UINT32 filesize;
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10 | UINT32 de_sector;
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11 | UINT32 de_offset;
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12 | DirectoryEntry dir_entry;
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13 | PartitionInfo *pi = parent->pi;
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14 |
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15 | /* find a free directory entry */
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16 | if ((de = find_in_directory(parent, NULL, NULL, &firstcluster,
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17 | &filesize, &de_sector, &de_offset)) == 0)
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18 | return 0; /* no free entries available */
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19 | /*=================================================================
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20 | GENAU HIER BEI "return 0;" SETZT ER DEN FEHLER (s.o.) AN
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21 | ==================================================================
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22 | */
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23 |
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24 | filesize = firstcluster = 0;
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25 |
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26 | #ifdef CONFIG_DIR_SUPPORT
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27 | /* when creating a directory, two special directories (. & ..) within
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28 | * that directory should always be created
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29 | */
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30 | if ((attributes & ATTR_DIRECTORY) == ATTR_DIRECTORY) {
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31 | UINT32 sector, parent_cluster;
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32 | int i;
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33 |
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34 | firstcluster = pi->op->allocate_one_cluster(pi);
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35 | debug_xil_printf("firstcluster for dir: %ld\n", firstcluster);
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36 | if (firstcluster == 0)
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37 | return 0; /* no free space */
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38 |
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39 | /* zero out all sectors in the allotted cluster */
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40 | memset(buf, 0, sizeof buf);
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41 | sector = starting_sector(firstcluster, pi);
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42 | debug_xil_printf("sectors starting from: %ld\n", sector);
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43 | for (i = 1, sector++; /* the first sector needs to have dot, dotdot entries
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44 | * and will be filled in later */
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45 | i < pi->SectorsPerCluster;
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46 | i++, sector++)
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47 | if (write_sector(sector, buf) != SECTORSIZE)
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48 | return 0; /* disk error */
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49 |
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50 | /* create dot & dotdot entries for the directory */
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51 |
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52 | /* the dot entry points to itself */
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53 | initialize_de(dotdot_entry, ".", "", firstcluster, 0, pi, ATTR_DIRECTORY);
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54 |
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55 | /* the dotdot entry should point to the parent of the new directory */
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56 | parent_cluster = parent->v.child.FirstCluster;
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57 | if (parent->parent == NULL) /* root */
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58 | parent_cluster = 0;
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59 | debug_xil_printf("parent cluster = %ld\n", parent_cluster);
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60 | initialize_de(dotdot_entry+1, "..", "", parent_cluster, 0, pi, ATTR_DIRECTORY);
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61 |
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62 | memcpy(buf, dotdot_entry, sizeof(DirectoryEntry)*2);
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63 | sector = starting_sector(firstcluster, pi);
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64 | if (write_sector(sector, buf) != SECTORSIZE)
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65 | return 0;
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66 | }
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67 | #endif
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68 | /*=================================================================
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69 | UND HIER WIRD INITIALIZE_DE AUFGERUFEN
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70 | ==================================================================
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71 | */
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72 | initialize_de(&dir_entry, (char *)name, (char *)ext, firstcluster, filesize,
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73 | pi, attributes);
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74 |
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75 | /* allocate a wd structure to hold the working directory info*/
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76 | if ((wd = malloc_wd(name)) == 0)
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77 | return 0;
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78 |
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79 | /* 1. read in the whole sector */
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80 | if (read_sector(de_sector, buf) != SECTORSIZE)
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81 | return 0;
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82 |
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83 | /* 2. write the new directory entry */
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84 | memcpy(buf + de_offset, (char*)&dir_entry, sizeof dir_entry);
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85 |
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86 | /* 3. write out the whole sector */
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87 | if (write_sector(de_sector, buf) != SECTORSIZE)
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88 | return 0;
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89 |
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90 | wd->v.child.FirstCluster = firstcluster;
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91 | wd->v.child.FileSize = filesize;
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92 | wd->v.child.DirLocation.sector = de_sector;
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93 | wd->v.child.DirLocation.offset = de_offset;
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94 | wd->pi = parent->pi;
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95 | wd->parent = parent;
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96 | return wd;
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97 | }
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