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annotate mpffs/ls.c @ 33:660b0ea739f3

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mpffs-dbgls implemented
author Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
date Sun, 30 Jun 2013 07:47:49 +0000
parents 0bf037ba4149
children 9bc7f0e03fa8
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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
31
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21 size_t
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22 get_file_size(head)
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23 struct objinfo *head;
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24 {
31
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25 int ent;
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26 struct objinfo ch;
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27 struct chunkinfo chi;
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28 size_t accum;
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29
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30 size_head_chunk(head, &chi);
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31 accum = chi.len;
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32 for (ent = head->descend; ent != 0xFFFF; ent = ch.descend) {
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33 ch.entryno = ent;
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34 get_index_entry(&ch);
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35 if (ch.type != 0xF4) {
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36 fprintf(stderr,
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37 "file continuation object at index %x: type %02X != expected F4\n",
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38 ent, ch.type);
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39 break;
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40 }
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41 validate_chunk(&ch);
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42 size_extra_chunk(&ch, &chi);
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43 accum += chi.len;
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44 if (ch.sibling != 0xFFFF)
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45 fprintf(stderr,
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46 "warning: file continuation object (index %x) has a non-nil sibling pointer\n",
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47 ent);
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48 }
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49 return(accum);
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50 }
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51
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52 dump_dir(firstent, path_prefix)
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53 {
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54 int ent;
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55 struct objinfo obj;
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56 u_long size;
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57
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58 for (ent = firstent; ent != 0xFFFF; ent = obj.sibling) {
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59 obj.entryno = ent;
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60 get_index_entry(&obj);
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61 if (!obj.type) /* skip deleted objects w/o further validation */
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62 continue;
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63 validate_chunk(&obj);
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64 validate_obj_name(&obj);
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65 if (path_prefix + strlen(obj.dataptr) + 2 > sizeof workpath) {
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66 fprintf(stderr,
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67 "handling object at index %x, name \"%s\": path buffer overflow\n",
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68 obj.entryno, (char *)obj.dataptr);
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69 exit(1);
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70 }
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71 sprintf(workpath + path_prefix, "/%s", (char *)obj.dataptr);
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72 switch (obj.type) {
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73 case 0xF2:
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74 /* directory */
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75 printf("d %s\n", workpath);
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76 dump_dir(obj.descend, strlen(workpath));
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77 continue;
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78 case 0xF1:
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79 /* regular file */
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80 size = get_file_size(&obj);
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81 printf("- %7lu %s\n", size, workpath);
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82 continue;
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83 case 0xE1:
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84 /* special .journal file */
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85 printf("j %7lu %s\n", (u_long) obj.len, workpath);
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86 continue;
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87 default:
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88 printf("%s (index entry #%x): unexpected type %02X; skipping\n",
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89 workpath, obj.entryno, obj.type);
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90 continue;
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91 }
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92 }
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93 }
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94
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95 usage()
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96 {
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97 fprintf(stderr, "usage: mpffs-ls [options] ffs-image\n");
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98 exit(1);
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99 }
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100
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101 main(argc, argv)
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102 char **argv;
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103 {
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104 extern int optind;
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105
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106 parse_cmdline_options(argc, argv);
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107 if (argc - optind != 1)
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108 usage();
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109 imgfile = argv[optind];
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110 preliminaries();
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111 dump_dir(root.descend, 0);
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112 exit(0);
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113 }