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annotate ffstools/tiffs-rd/object.c @ 958:4bbe1db8efbe

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c139-lldbg: dump command added
author Mychaela Falconia <falcon@ivan.Harhan.ORG>
date Wed, 04 Nov 2015 20:52:26 +0000
parents 317936902be4
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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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);
234
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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 }