FreeCalypso > hg > freecalypso-tools
annotate ffstools/tiffs-rd/object.c @ 904:5041bcb8140f
tchtools/fc-vm2hex.c: update header comment for new situation
author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Wed, 28 Dec 2022 08:41:57 +0000 |
parents | e7502631a0f9 |
children | 1f27fc13eab7 |
rev | line source |
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0
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1 /* |
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2 * This C module implements object-level analysis. |
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3 */ |
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4 |
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5 #include <sys/types.h> |
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6 #include <ctype.h> |
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7 #include <stdio.h> |
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8 #include <stdlib.h> |
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9 #include <string.h> |
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10 #include <strings.h> |
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11 #include "types.h" |
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12 #include "struct.h" |
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13 #include "globals.h" |
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14 #include "pathname.h" |
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15 |
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16 validate_obj_name(ino, root_special) |
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17 { |
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18 struct inode_info *inf = inode_info[ino]; |
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19 u8 *p, *endp; |
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20 int c; |
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21 |
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22 if (!inf->len) |
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23 return(0); |
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24 p = inf->dataptr; |
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25 endp = p + inf->len; |
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26 for (; ; p++) { |
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27 if (p >= endp) |
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28 return(0); |
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29 c = *p; |
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30 if (!c) |
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31 break; |
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32 if (c < ' ' || c > '~') |
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33 return(0); |
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34 if (root_special || isalnum(c)) |
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35 continue; |
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36 switch (c) { |
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37 case '.': |
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38 case ',': |
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39 case '_': |
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40 case '-': |
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41 case '+': |
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42 case '%': |
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43 case '$': |
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44 case '#': |
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45 continue; |
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46 default: |
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47 return(0); |
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48 } |
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49 } |
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50 if (!root_special) { |
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51 c = p - inf->dataptr; |
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52 if (c < 1 || c > MAX_FN_COMPONENT) |
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53 return(0); |
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54 if (!strcmp(inf->dataptr, ".") || !strcmp(inf->dataptr, "..")) |
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55 return(0); |
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56 } |
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57 inf->byte_after_name = p + 1; |
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58 return(1); |
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59 } |
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60 |
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61 u8 * |
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62 find_end_of_chunk(inf) |
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63 struct inode_info *inf; |
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64 { |
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65 u8 *p; |
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66 int i; |
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67 |
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68 p = inf->dataptr + inf->len; |
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69 for (i = 1; i <= 16; i++) { |
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70 if (!p[-i]) |
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71 return(p - i); |
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72 if (p[-i] != 0xFF) |
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73 break; |
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74 } |
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75 fprintf(stderr, |
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76 "error: chunk @%x (inode #%x): no valid termination found\n", |
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77 inf->offset, inf->ino); |
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78 return(p); /* bogon, allows the rest to continue */ |
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79 } |
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80 |
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81 size_head_chunk(inf, chi) |
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82 struct inode_info *inf; |
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83 struct chunkinfo *chi; |
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84 { |
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85 chi->start = inf->byte_after_name; |
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86 chi->end = find_end_of_chunk(inf); |
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87 if (chi->start >= chi->end) { |
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88 chi->len = 0; |
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89 return(0); |
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90 } else { |
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91 chi->len = chi->end - chi->start; |
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92 return(1); |
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93 } |
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94 } |
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95 |
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96 size_extra_chunk(inf, chi) |
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97 struct inode_info *inf; |
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98 struct chunkinfo *chi; |
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99 { |
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100 chi->start = inf->dataptr; |
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101 chi->end = find_end_of_chunk(inf); |
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102 chi->len = chi->end - chi->start; |
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103 } |
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104 |
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105 void |
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106 iterate_seg_file(seghead, callback, callback_data, deleted, verbose) |
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107 void (*callback)(); |
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108 u_long callback_data; |
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109 { |
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110 int ino; |
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111 struct inode_info *inf; |
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112 |
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113 for (ino = inode_info[seghead]->descend; ino; ino = inf->descend) { |
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114 loop: if (!validate_inode(ino)) { |
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115 fprintf(stderr, |
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116 "error: following seg file hit invalid inode #%x\n", |
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117 ino); |
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118 return; |
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119 } |
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120 inf = inode_info[ino]; |
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121 switch (inf->type) { |
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122 case 0xF4: |
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123 callback(inf, callback_data); |
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124 continue; |
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125 case 0x00: |
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126 if (deleted) { |
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127 if (inf->len) |
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128 callback(inf, callback_data); |
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129 else |
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130 fprintf(stderr, |
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131 "error: presumed deleted segment inode #%x has been reclaimed\n", |
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132 ino); |
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133 continue; |
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134 } |
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135 if (!inf->sibling) { |
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136 fprintf(stderr, |
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137 "error: segment object at inode #%x: marked deleted, but no sibling\n", |
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138 ino); |
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139 return; |
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140 } |
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141 if (verbose) |
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142 printf("seg inode #%x deleted, moved to #%x\n", |
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143 ino, inf->sibling); |
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144 ino = inf->sibling; |
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145 goto loop; |
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146 default: |
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147 fprintf(stderr, |
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148 "error: inode #%x: unexpected type %02X when expecting segment (F4)\n", |
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149 ino, inf->type); |
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150 return; |
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151 } |
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152 } |
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153 } |