FreeCalypso > hg > freecalypso-tools

annotate ffstools/tiffs-rd/inode.c @ 284:556bb8c860fa

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
librftab added to top Makefile as dependency for ffstools and rvinterf
author Mychaela Falconia <falcon@freecalypso.org>
date Sat, 18 Nov 2017 00:06:34 +0000
parents e7502631a0f9
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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0
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Mychaela Falconia <falcon@freecalypso.org>
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1 /*
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2 * This C module implements the reading and decoding of inode information.
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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 <endian.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
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15 u8 blank_flash_line[16] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
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16 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF};
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17
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18 alloc_inode_table()
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19 {
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20 inode_info = malloc(sizeof(struct inode_info *) * inode_limit);
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21 if (!inode_info) {
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22 perror("malloc of inode table");
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23 exit(1);
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24 }
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25 bzero(inode_info, sizeof(struct inode_info *) * inode_limit);
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26 }
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27
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28 static int
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29 convert_ptr(in, infp)
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30 int in;
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31 int *infp;
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32 {
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33 if (in == 0xFFFF) {
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34 *infp = 0;
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35 return(0);
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36 }
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37 if (in < 1 || in >= inode_limit)
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38 return(-1);
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39 *infp = in;
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40 return(1);
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41 }
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42
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43 validate_inode(ino)
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44 {
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45 struct inode_flash *fl;
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46 struct inode_info *inf;
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47
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48 if (ino < 1 || ino >= inode_limit)
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49 return(0);
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50 if (inode_info[ino])
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Mychaela Falconia <falcon@freecalypso.org>
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51 return(1);
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Mychaela Falconia <falcon@freecalypso.org>
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52 fl = (struct inode_flash *)inode_block + ino;
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53 if (!bcmp(fl, blank_flash_line, sizeof blank_flash_line))
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54 return(0);
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55 inf = malloc(sizeof(struct inode_info));
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56 if (!inf) {
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57 perror("malloc of struct inode_info");
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58 exit(1);
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59 }
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60 bzero(inf, sizeof(struct inode_info));
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61 inf->ino = ino;
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62 inf->len = le16toh(fl->len);
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63 if (inf->len & 0xF) {
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64 fprintf(stderr,
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65 "warning: inode #%x: invalid length, skipping\n", ino);
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66 free(inf);
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67 return(0);
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68 }
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69 inf->type = fl->type;
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70 switch (inf->type) {
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71 case 0x00:
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72 break;
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73 case 0xE1:
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74 case 0xF1:
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75 case 0xF2:
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76 case 0xF3:
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77 case 0xF4:
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78 if (!inf->len) {
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79 fprintf(stderr,
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80 "warning: inode #%x: non-deleted object has zero length, skipping\n",
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81 ino);
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82 free(inf);
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83 return(0);
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84 }
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85 break;
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86 default:
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87 fprintf(stderr,
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88 "warning: inode #%x: unexpected object type %02X, skipping\n",
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Mychaela Falconia <falcon@freecalypso.org>
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89 ino, inf->type);
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90 free(inf);
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91 return(0);
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92 }
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93 if (convert_ptr(le16toh(fl->descend), &inf->descend) < 0) {
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94 fprintf(stderr,
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95 "warning: inode #%x: invalid descend pointer, skipping\n",
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Mychaela Falconia <falcon@freecalypso.org>
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96 ino);
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97 free(inf);
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98 return(0);
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99 }
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100 if (convert_ptr(le16toh(fl->sibling), &inf->sibling) < 0) {
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101 fprintf(stderr,
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102 "warning: inode #%x: invalid sibling pointer, skipping\n",
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Mychaela Falconia <falcon@freecalypso.org>
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103 ino);
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Mychaela Falconia <falcon@freecalypso.org>
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104 free(inf);
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Mychaela Falconia <falcon@freecalypso.org>
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105 return(0);
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Mychaela Falconia <falcon@freecalypso.org>
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106 }
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Mychaela Falconia <falcon@freecalypso.org>
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107 if (inf->len) {
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Mychaela Falconia <falcon@freecalypso.org>
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108 inf->rawloc = le32toh(fl->dataptr);
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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109 if (old_16bit_location)
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Mychaela Falconia <falcon@freecalypso.org>
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110 inf->rawloc >>= 16;
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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111 if (inf->rawloc > 0x0FFFFFFF) {
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Mychaela Falconia <falcon@freecalypso.org>
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112 invdptr: fprintf(stderr,
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Mychaela Falconia <falcon@freecalypso.org>
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113 "warning: inode #%x: invalid data pointer, skipping\n",
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Mychaela Falconia <falcon@freecalypso.org>
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114 ino);
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Mychaela Falconia <falcon@freecalypso.org>
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115 free(inf);
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Mychaela Falconia <falcon@freecalypso.org>
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116 return(0);
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Mychaela Falconia <falcon@freecalypso.org>
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117 }
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Mychaela Falconia <falcon@freecalypso.org>
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diff changeset
118 inf->offset = inf->rawloc << 4;
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
119 if (inf->offset >= total_ffs_size)
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
120 goto invdptr;
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
121 if (inf->offset + inf->len > total_ffs_size) {
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
122 fprintf(stderr,
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
123 "warning: inode #%x: data pointer + length > FFS total size, skipping\n",
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
124 ino);
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
125 free(inf);
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
126 return(0);
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
127 }
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
128 inf->dataptr = image + inf->offset;
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
129 }
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
130 inode_info[ino] = inf;
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
131 return(1);
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
132 }
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
133
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
134 find_root_inode()
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
135 {
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
136 int ino;
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
137
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
138 if (root_inode) {
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
139 if (!validate_inode(root_inode)) {
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
140 fprintf(stderr,
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
141 "error: root inode specified with -r is invalid\n");
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
142 exit(1);
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
143 }
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
144 return(1);
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
145 }
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
146 for (ino = 1; ino < inode_limit; ino++) {
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
147 if (!validate_inode(ino))
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
148 continue;
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
149 if (inode_info[ino]->type != 0xF2)
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
150 continue;
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
151 if (*inode_info[ino]->dataptr != '/')
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
152 continue;
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
153 root_inode = ino;
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
154 if (verbose)
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
155 fprintf(stderr, "Found root inode at #%x\n", ino);
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
156 if (inode_info[ino]->sibling)
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
157 fprintf(stderr,
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
158 "warning: root inode #%x has a non-null sibling pointer\n",
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
159 ino);
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
160 return(0);
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
161 }
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
162 fprintf(stderr, "error: no root inode found; try -r\n");
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
163 exit(1);
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
164 }