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annotate mpffs/ls.c @ 103:a10acb1688e0

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thumbdis: buglet in the decoding of sub-from-sp
author Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
date Mon, 31 Mar 2014 01:59:28 +0000
parents 9bc7f0e03fa8
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 /*
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2 * This module contains the main function and other code specific to mpffs-ls
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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 <string.h>
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9 #include <strings.h>
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10 #include <stdlib.h>
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11 #include <unistd.h>
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12 #include "types.h"
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13 #include "struct.h"
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14
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15 extern char *imgfile;
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16 extern struct objinfo root;
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17 extern int verbose;
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18
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19 char workpath[512];
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20
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21 void
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22 extra_chunk_callback(obj, opaque)
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23 struct objinfo *obj;
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24 u_long opaque;
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25 {
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26 size_t *accump = (size_t *) opaque;
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27 struct chunkinfo chi;
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28
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29 size_extra_chunk(obj, &chi);
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30 *accump += chi.len;
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31 }
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32
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33 size_t
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34 get_file_size(head)
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35 struct objinfo *head;
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36 {
31
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37 struct chunkinfo chi;
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38 size_t accum;
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39
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40 size_head_chunk(head, &chi);
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41 accum = chi.len;
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42 iterate_extra_chunks(head->descend, extra_chunk_callback,
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43 (u_long) &accum);
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44 return(accum);
30
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45 }
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46
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47 dump_dir(firstent, path_prefix)
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48 {
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49 int ent;
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50 struct objinfo obj;
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51 u_long size;
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52
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53 for (ent = firstent; ent != 0xFFFF; ent = obj.sibling) {
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54 obj.entryno = ent;
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55 get_index_entry(&obj);
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56 if (!obj.type) /* skip deleted objects w/o further validation */
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57 continue;
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58 validate_chunk(&obj);
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59 validate_obj_name(&obj);
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60 if (path_prefix + strlen(obj.dataptr) + 2 > sizeof workpath) {
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61 fprintf(stderr,
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62 "handling object at index %x, name \"%s\": path buffer overflow\n",
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63 obj.entryno, (char *)obj.dataptr);
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64 exit(1);
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65 }
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66 sprintf(workpath + path_prefix, "/%s", (char *)obj.dataptr);
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67 switch (obj.type) {
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68 case 0xF2:
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69 /* directory */
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70 printf("d %s\n", workpath);
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71 dump_dir(obj.descend, strlen(workpath));
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72 continue;
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73 case 0xF1:
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74 /* regular file */
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75 size = get_file_size(&obj);
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76 printf("- %7lu %s\n", size, workpath);
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77 continue;
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78 case 0xE1:
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79 /* special .journal file */
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80 printf("j %7lu %s\n", (u_long) obj.len, workpath);
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81 continue;
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82 default:
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83 printf("%s (index entry #%x): unexpected type %02X; skipping\n",
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84 workpath, obj.entryno, obj.type);
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85 continue;
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86 }
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87 }
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88 }
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89
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90 usage()
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91 {
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92 fprintf(stderr, "usage: mpffs-ls [options] ffs-image\n");
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93 exit(1);
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94 }
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95
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96 main(argc, argv)
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97 char **argv;
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98 {
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99 extern int optind;
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100
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101 parse_cmdline_options(argc, argv);
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102 if (argc - optind != 1)
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103 usage();
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104 imgfile = argv[optind];
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105 preliminaries();
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106 dump_dir(root.descend, 0);
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107 exit(0);
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108 }