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annotate mysteryffs/extract.c @ 25:ae5337f881e3

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MysteryFFS: beginning of the extract utility
author Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
date Sat, 18 May 2013 23:08:13 +0000
parents
children d19b4e20ff9f
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
25
ae5337f881e3 MysteryFFS: beginning of the extract utility
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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1 /*
ae5337f881e3 MysteryFFS: beginning of the extract utility
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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2 * This program is the logical culmination of the MysteryFFS reverse eng
ae5337f881e3 MysteryFFS: beginning of the extract utility
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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3 * experiments: it walks the FFS directory tree from the root down,
ae5337f881e3 MysteryFFS: beginning of the extract utility
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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4 * recreates a matching tree in the local Unix file system, and
ae5337f881e3 MysteryFFS: beginning of the extract utility
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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5 * extracts the full content of all data files.
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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6 *
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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7 * All acquired understanding of the MysteryFFS structure is tested
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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8 * in the process.
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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9 */
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10
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11 #include <sys/types.h>
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12 #include <sys/file.h>
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13 #include <sys/stat.h>
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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14 #include <endian.h>
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15 #include <ctype.h>
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16 #include <stdio.h>
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17 #include <string.h>
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18 #include <strings.h>
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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19 #include <stdlib.h>
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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20 #include <unistd.h>
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21
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22 typedef unsigned char u8;
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23 typedef unsigned short u16;
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24 typedef unsigned int u32;
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25
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26 u8 mysteryffs_hdr[6] = {'F', 'f', 's', '#', 0x10, 0x02};
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27
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28 /* actual MysteryFFS on-media structure */
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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29 struct mysteryffs_index {
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30 u16 len;
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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31 u8 unknown_b1;
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32 u8 type;
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33 u16 descend;
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34 u16 sibling;
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35 u32 dataptr;
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36 u16 unknown_w1;
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37 u16 unknown_w2;
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38 };
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39
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40 /* our own struct for convenience */
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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41 struct objinfo {
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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42 u16 entryno;
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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43 struct mysteryffs_index *idxrec;
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44 u8 *dataptr;
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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45 u32 offset;
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46 u16 len;
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47 u8 type;
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48 u16 descend;
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49 u16 sibling;
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50 };
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51
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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52 char *imgfile;
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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53 u32 eraseblk_size;
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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54 int total_blocks;
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55 u32 total_img_size;
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56 u8 *image, *indexblk;
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57
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58 char workpath[512];
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59
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60 read_img_file()
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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61 {
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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62 int fd;
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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63 struct stat st;
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64
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65 fd = open(imgfile, O_RDONLY);
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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66 if (fd < 0) {
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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67 perror(imgfile);
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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68 exit(1);
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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69 }
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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70 fstat(fd, &st);
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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71 if (!S_ISREG(st.st_mode)) {
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72 fprintf(stderr, "%s is not a regular file\n", imgfile);
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73 exit(1);
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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74 }
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75 if (st.st_size < total_img_size) {
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76 fprintf(stderr, "%s has fewer than 0x%x bytes\n", imgfile,
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77 total_img_size);
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78 exit(1);
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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79 }
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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80 image = malloc(total_img_size);
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81 if (!image) {
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82 perror("malloc");
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83 exit(1);
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84 }
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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85 read(fd, image, total_img_size);
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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86 close(fd);
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87 }
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88
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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89 find_index_block()
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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90 {
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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91 int i;
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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92 u8 *ptr;
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93
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94 for (ptr = image, i = 0; i < total_blocks; i++, ptr += eraseblk_size) {
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95 if (bcmp(ptr, mysteryffs_hdr, 6))
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96 continue;
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97 if (ptr[8] != 0xAB)
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98 continue;
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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99 printf("Found index in erase block #%d (offset %x)\n", i,
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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100 ptr - image);
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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101 indexblk = ptr;
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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102 return(0);
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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103 }
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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104 fprintf(stderr, "could not find a MysteryFFS index block in %s\n",
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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105 imgfile);
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106 exit(1);
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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107 }
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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108
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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109 get_index_entry(oi)
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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110 struct objinfo *oi;
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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111 {
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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112 struct mysteryffs_index *le;
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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113
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114 if (oi->entryno >= (eraseblk_size >> 4)) {
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115 fprintf(stderr,
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116 "error: index block pointer %x past the erase block size!\n",
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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117 oi->entryno);
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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118 exit(1);
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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119 }
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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120 le = (struct mysteryffs_index *) indexblk + oi->entryno;
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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121 oi->idxrec = le;
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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122 oi->len = le16toh(le->len);
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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123 oi->type = le->type;
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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124 oi->descend = le16toh(le->descend);
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125 oi->sibling = le16toh(le->sibling);
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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126 return(0);
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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127 }
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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128
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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129 validate_chunk(oi)
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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130 struct objinfo *oi;
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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131 {
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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132 u32 dptr;
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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133
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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134 if (oi->len & 0xF || !oi->len) {
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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135 fprintf(stderr, "index entry #%x: invalid chunk length\n",
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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136 oi->entryno);
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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137 exit(1);
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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138 }
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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139 dptr = le32toh(oi->idxrec->dataptr);
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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140 if (dptr > 0x0FFFFFFF) {
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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141 invdptr: fprintf(stderr, "index entry #%x: invalid data pointer\n",
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parents:
diff changeset
142 oi->entryno);
ae5337f881e3 MysteryFFS: beginning of the extract utility
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
143 exit(1);
ae5337f881e3 MysteryFFS: beginning of the extract utility
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
144 }
ae5337f881e3 MysteryFFS: beginning of the extract utility
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
145 dptr <<= 4;
ae5337f881e3 MysteryFFS: beginning of the extract utility
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
146 if (dptr >= total_img_size - oi->len)
ae5337f881e3 MysteryFFS: beginning of the extract utility
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
147 goto invdptr;
ae5337f881e3 MysteryFFS: beginning of the extract utility
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
148 oi->offset = dptr;
ae5337f881e3 MysteryFFS: beginning of the extract utility
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
149 oi->dataptr = image + dptr;
ae5337f881e3 MysteryFFS: beginning of the extract utility
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
150 return(0);
ae5337f881e3 MysteryFFS: beginning of the extract utility
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
151 }
ae5337f881e3 MysteryFFS: beginning of the extract utility
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
152
ae5337f881e3 MysteryFFS: beginning of the extract utility
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
153 validate_obj_name(oi)
ae5337f881e3 MysteryFFS: beginning of the extract utility
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
154 struct objinfo *oi;
ae5337f881e3 MysteryFFS: beginning of the extract utility
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
155 {
ae5337f881e3 MysteryFFS: beginning of the extract utility
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
156 u8 *cp;
ae5337f881e3 MysteryFFS: beginning of the extract utility
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
157 int cnt;
ae5337f881e3 MysteryFFS: beginning of the extract utility
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
158
ae5337f881e3 MysteryFFS: beginning of the extract utility
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
159 for (cp = oi->dataptr, cnt = 0; ; cp++, cnt++) {
ae5337f881e3 MysteryFFS: beginning of the extract utility
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
160 if (cnt >= oi->len) {
ae5337f881e3 MysteryFFS: beginning of the extract utility
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
161 fprintf(stderr,
ae5337f881e3 MysteryFFS: beginning of the extract utility
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
162 "object at index %x: name expected at %x: length overrun\n",
ae5337f881e3 MysteryFFS: beginning of the extract utility
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
163 oi->entryno, oi->offset);
ae5337f881e3 MysteryFFS: beginning of the extract utility
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
164 exit(1);
ae5337f881e3 MysteryFFS: beginning of the extract utility
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
165 }
ae5337f881e3 MysteryFFS: beginning of the extract utility
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
166 if (!*cp)
ae5337f881e3 MysteryFFS: beginning of the extract utility
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
167 break;
ae5337f881e3 MysteryFFS: beginning of the extract utility
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
168 if (*cp < '!' || *cp > '~') {
ae5337f881e3 MysteryFFS: beginning of the extract utility
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
169 fprintf(stderr,
ae5337f881e3 MysteryFFS: beginning of the extract utility
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
170 "object at index %x: name expected at %x: bad character\n",
ae5337f881e3 MysteryFFS: beginning of the extract utility
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
171 oi->entryno, oi->offset);
ae5337f881e3 MysteryFFS: beginning of the extract utility
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
172 exit(1);
ae5337f881e3 MysteryFFS: beginning of the extract utility
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
173 }
ae5337f881e3 MysteryFFS: beginning of the extract utility
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
174 }
ae5337f881e3 MysteryFFS: beginning of the extract utility
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
175 if (!cnt) {
ae5337f881e3 MysteryFFS: beginning of the extract utility
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
176 fprintf(stderr,
ae5337f881e3 MysteryFFS: beginning of the extract utility
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
177 "object at index %x: name expected at %x: null string\n",
ae5337f881e3 MysteryFFS: beginning of the extract utility
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
178 oi->entryno, oi->offset);
ae5337f881e3 MysteryFFS: beginning of the extract utility
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
179 exit(1);
ae5337f881e3 MysteryFFS: beginning of the extract utility
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
180 }
ae5337f881e3 MysteryFFS: beginning of the extract utility
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
181 return(0);
ae5337f881e3 MysteryFFS: beginning of the extract utility
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
182 }
ae5337f881e3 MysteryFFS: beginning of the extract utility
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
183
ae5337f881e3 MysteryFFS: beginning of the extract utility
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
184 name_safe_for_extract(oi)
ae5337f881e3 MysteryFFS: beginning of the extract utility
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
185 struct objinfo *oi;
ae5337f881e3 MysteryFFS: beginning of the extract utility
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
186 {
ae5337f881e3 MysteryFFS: beginning of the extract utility
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
187 char *s;
ae5337f881e3 MysteryFFS: beginning of the extract utility
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
188
ae5337f881e3 MysteryFFS: beginning of the extract utility
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
189 s = (char *)oi->dataptr;
ae5337f881e3 MysteryFFS: beginning of the extract utility
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
190 if (!isalnum(*s) && *s != '_')
ae5337f881e3 MysteryFFS: beginning of the extract utility
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
191 return(0);
ae5337f881e3 MysteryFFS: beginning of the extract utility
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
192 for (s++; *s; s++)
ae5337f881e3 MysteryFFS: beginning of the extract utility
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
193 if (!isalnum(*s) && *s != '_' && *s != '.')
ae5337f881e3 MysteryFFS: beginning of the extract utility
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
194 return(0);
ae5337f881e3 MysteryFFS: beginning of the extract utility
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
195 return(1);
ae5337f881e3 MysteryFFS: beginning of the extract utility
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
196 }
ae5337f881e3 MysteryFFS: beginning of the extract utility
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
197
ae5337f881e3 MysteryFFS: beginning of the extract utility
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
198 dump_dir(firstent, path_prefix)
ae5337f881e3 MysteryFFS: beginning of the extract utility
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
199 {
ae5337f881e3 MysteryFFS: beginning of the extract utility
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
200 int ent;
ae5337f881e3 MysteryFFS: beginning of the extract utility
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
201 struct objinfo obj;
ae5337f881e3 MysteryFFS: beginning of the extract utility
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
202 int typechar;
ae5337f881e3 MysteryFFS: beginning of the extract utility
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
203 u32 length;
ae5337f881e3 MysteryFFS: beginning of the extract utility
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
204
ae5337f881e3 MysteryFFS: beginning of the extract utility
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
205 for (ent = firstent; ent != 0xFFFF; ent = obj.sibling) {
ae5337f881e3 MysteryFFS: beginning of the extract utility
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
206 obj.entryno = ent;
ae5337f881e3 MysteryFFS: beginning of the extract utility
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
207 get_index_entry(&obj);
ae5337f881e3 MysteryFFS: beginning of the extract utility
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
208 if (!obj.type) /* skip deleted objects w/o further validation */
ae5337f881e3 MysteryFFS: beginning of the extract utility
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
209 continue;
ae5337f881e3 MysteryFFS: beginning of the extract utility
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
210 validate_chunk(&obj);
ae5337f881e3 MysteryFFS: beginning of the extract utility
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
211 validate_obj_name(&obj);
ae5337f881e3 MysteryFFS: beginning of the extract utility
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
212 if (path_prefix + strlen(obj.dataptr) + 2 > sizeof workpath) {
ae5337f881e3 MysteryFFS: beginning of the extract utility
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
213 fprintf(stderr,
ae5337f881e3 MysteryFFS: beginning of the extract utility
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
214 "handling object at index %x, name \"%s\": path buffer overflow\n",
ae5337f881e3 MysteryFFS: beginning of the extract utility
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
215 obj.entryno, (char *)obj.dataptr);
ae5337f881e3 MysteryFFS: beginning of the extract utility
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
216 exit(1);
ae5337f881e3 MysteryFFS: beginning of the extract utility
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
217 }
ae5337f881e3 MysteryFFS: beginning of the extract utility
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
218 sprintf(workpath + path_prefix, "/%s", (char *)obj.dataptr);
ae5337f881e3 MysteryFFS: beginning of the extract utility
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
219 switch (obj.type) {
ae5337f881e3 MysteryFFS: beginning of the extract utility
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
220 case 0xF2:
ae5337f881e3 MysteryFFS: beginning of the extract utility
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
221 /* directory */
ae5337f881e3 MysteryFFS: beginning of the extract utility
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
222 printf("dir: %s\n", workpath);
ae5337f881e3 MysteryFFS: beginning of the extract utility
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
223 /* mkdir will go here */
ae5337f881e3 MysteryFFS: beginning of the extract utility
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
224 dump_dir(obj.descend, strlen(workpath));
ae5337f881e3 MysteryFFS: beginning of the extract utility
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
225 continue;
ae5337f881e3 MysteryFFS: beginning of the extract utility
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
226 case 0xF1:
ae5337f881e3 MysteryFFS: beginning of the extract utility
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
227 /* regular file */
ae5337f881e3 MysteryFFS: beginning of the extract utility
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
228 printf("file: %s\n", workpath);
ae5337f881e3 MysteryFFS: beginning of the extract utility
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
229 /* file extraction will go here */
ae5337f881e3 MysteryFFS: beginning of the extract utility
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
230 continue;
ae5337f881e3 MysteryFFS: beginning of the extract utility
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
231 case 0xE1:
ae5337f881e3 MysteryFFS: beginning of the extract utility
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
232 /* special .journal file */
ae5337f881e3 MysteryFFS: beginning of the extract utility
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
233 if (path_prefix == 0 &&
ae5337f881e3 MysteryFFS: beginning of the extract utility
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
234 !strcmp((char *)obj.dataptr, ".journal"))
ae5337f881e3 MysteryFFS: beginning of the extract utility
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
235 printf("skipping /.journal\n");
ae5337f881e3 MysteryFFS: beginning of the extract utility
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
236 else
ae5337f881e3 MysteryFFS: beginning of the extract utility
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
237 printf("skipping unexpected E1 file: %s\n",
ae5337f881e3 MysteryFFS: beginning of the extract utility
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
238 workpath);
ae5337f881e3 MysteryFFS: beginning of the extract utility
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
239 continue;
ae5337f881e3 MysteryFFS: beginning of the extract utility
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
240 default:
ae5337f881e3 MysteryFFS: beginning of the extract utility
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
241 printf("%s (index entry #%x): unexpected type %02X; skipping\n",
ae5337f881e3 MysteryFFS: beginning of the extract utility
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
242 workpath, obj.entryno, obj.type);
ae5337f881e3 MysteryFFS: beginning of the extract utility
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
243 continue;
ae5337f881e3 MysteryFFS: beginning of the extract utility
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
244 }
ae5337f881e3 MysteryFFS: beginning of the extract utility
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
245 }
ae5337f881e3 MysteryFFS: beginning of the extract utility
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
246 }
ae5337f881e3 MysteryFFS: beginning of the extract utility
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
247
ae5337f881e3 MysteryFFS: beginning of the extract utility
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
248 dump_root()
ae5337f881e3 MysteryFFS: beginning of the extract utility
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
249 {
ae5337f881e3 MysteryFFS: beginning of the extract utility
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
250 struct objinfo root;
ae5337f881e3 MysteryFFS: beginning of the extract utility
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
251
ae5337f881e3 MysteryFFS: beginning of the extract utility
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
252 root.entryno = 1;
ae5337f881e3 MysteryFFS: beginning of the extract utility
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
253 get_index_entry(&root);
ae5337f881e3 MysteryFFS: beginning of the extract utility
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
254 validate_chunk(&root);
ae5337f881e3 MysteryFFS: beginning of the extract utility
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
255 validate_obj_name(&root);
ae5337f881e3 MysteryFFS: beginning of the extract utility
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
256 printf("Root node name: %s\n", (char *)root.dataptr);
ae5337f881e3 MysteryFFS: beginning of the extract utility
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
257 if (root.type != 0xF2) {
ae5337f881e3 MysteryFFS: beginning of the extract utility
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
258 fprintf(stderr,
ae5337f881e3 MysteryFFS: beginning of the extract utility
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
259 "error: index entry #1 (expected root dir) is not a directory\n");
ae5337f881e3 MysteryFFS: beginning of the extract utility
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
260 exit(1);
ae5337f881e3 MysteryFFS: beginning of the extract utility
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
261 }
ae5337f881e3 MysteryFFS: beginning of the extract utility
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
262 if (root.sibling != 0xFFFF)
ae5337f881e3 MysteryFFS: beginning of the extract utility
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
263 printf("warning: root entry has a non-nil sibling pointer\n");
ae5337f881e3 MysteryFFS: beginning of the extract utility
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
264 dump_dir(root.descend, 0);
ae5337f881e3 MysteryFFS: beginning of the extract utility
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
265 }
ae5337f881e3 MysteryFFS: beginning of the extract utility
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
266
ae5337f881e3 MysteryFFS: beginning of the extract utility
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
267 main(argc, argv)
ae5337f881e3 MysteryFFS: beginning of the extract utility
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
268 char **argv;
ae5337f881e3 MysteryFFS: beginning of the extract utility
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
269 {
ae5337f881e3 MysteryFFS: beginning of the extract utility
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
270 if (argc != 4) {
ae5337f881e3 MysteryFFS: beginning of the extract utility
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
271 fprintf(stderr, "usage: %s imgfile blksize nblocks\n", argv[0]);
ae5337f881e3 MysteryFFS: beginning of the extract utility
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
272 exit(1);
ae5337f881e3 MysteryFFS: beginning of the extract utility
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
273 }
ae5337f881e3 MysteryFFS: beginning of the extract utility
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
274 imgfile = argv[1];
ae5337f881e3 MysteryFFS: beginning of the extract utility
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
275 eraseblk_size = strtoul(argv[2], 0, 0);
ae5337f881e3 MysteryFFS: beginning of the extract utility
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
276 total_blocks = strtoul(argv[3], 0, 0);
ae5337f881e3 MysteryFFS: beginning of the extract utility
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
277 total_img_size = eraseblk_size * total_blocks;
ae5337f881e3 MysteryFFS: beginning of the extract utility
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
278 read_img_file();
ae5337f881e3 MysteryFFS: beginning of the extract utility
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
279 find_index_block();
ae5337f881e3 MysteryFFS: beginning of the extract utility
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
280 dump_root();
ae5337f881e3 MysteryFFS: beginning of the extract utility
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
281 exit(0);
ae5337f881e3 MysteryFFS: beginning of the extract utility
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
282 }