FreeCalypso > hg > freecalypso-reveng

annotate mpffs/xtr.c @ 36:390be89892c4

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mpffs-xtr ported over
author Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
date Sun, 30 Jun 2013 17:24:21 +0000
parents
children 7ceab8bfacb3
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rev   line source
36
390be89892c4 mpffs-xtr ported over
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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diff changeset
1 /*
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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2 * This module contains the main function and other code specific to mpffs-xtr
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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3 */
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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4
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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5 #include <sys/types.h>
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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6 #include <sys/file.h>
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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7 #include <ctype.h>
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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8 #include <stdio.h>
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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9 #include <string.h>
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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10 #include <strings.h>
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11 #include <stdlib.h>
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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12 #include <unistd.h>
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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13 #include "types.h"
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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14 #include "struct.h"
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15
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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16 extern char *imgfile;
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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17 extern struct objinfo root;
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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18 extern int verbose;
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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19
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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20 extern u8 *find_end_of_chunk();
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21
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22 char workpath[512];
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23
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24 name_safe_for_extract(oi)
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25 struct objinfo *oi;
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26 {
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27 char *s;
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28
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29 s = (char *)oi->dataptr;
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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30 if (!isalnum(*s) && *s != '_')
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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31 return(0);
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32 for (s++; *s; s++)
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33 if (!isalnum(*s) && *s != '_' && *s != '.')
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34 return(0);
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35 return(1);
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36 }
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37
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38 void
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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39 dump_head_chunk(fd, ch)
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40 struct objinfo *ch;
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41 {
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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42 u8 *endname, *endchunk;
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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43
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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44 endname = (u8 *) index((char *)ch->dataptr, '\0') + 1;
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45 endchunk = find_end_of_chunk(ch);
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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46 if (endchunk <= endname)
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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47 return;
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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48 write(fd, endname, endchunk - endname);
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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49 }
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50
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51 void
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52 dump_extra_chunk(fd, ch)
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53 struct objinfo *ch;
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54 {
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55 u8 *endchunk;
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56
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57 endchunk = find_end_of_chunk(ch);
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58 write(fd, ch->dataptr, endchunk - ch->dataptr);
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59 }
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60
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61 extract_file(head)
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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62 struct objinfo *head;
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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63 {
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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64 int fd;
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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65 int ent;
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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66 struct objinfo ch;
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67
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68 fd = open(workpath + 1, O_WRONLY|O_CREAT|O_TRUNC, 0666);
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69 if (fd < 0) {
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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70 perror(workpath + 1);
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71 exit(1);
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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72 }
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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73 dump_head_chunk(fd, head);
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74 for (ent = head->descend; ent != 0xFFFF; ent = ch.descend) {
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75 ch.entryno = ent;
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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76 get_index_entry(&ch);
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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77 if (ch.type != 0xF4) {
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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78 fprintf(stderr,
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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79 "file continuation object at index %x: type %02X != expected F4\n",
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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80 ent, ch.type);
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81 exit(1);
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82 }
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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83 validate_chunk(&ch);
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84 dump_extra_chunk(fd, &ch);
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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85 if (ch.sibling != 0xFFFF)
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86 printf("warning: file continuation object (index %x) has a non-nil sibling pointer\n",
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87 ent);
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88 }
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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89 close(fd);
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90 }
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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91
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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92 dump_dir(firstent, path_prefix)
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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93 {
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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94 int ent;
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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95 struct objinfo obj;
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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96
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97 for (ent = firstent; ent != 0xFFFF; ent = obj.sibling) {
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98 obj.entryno = ent;
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99 get_index_entry(&obj);
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100 if (!obj.type) /* skip deleted objects w/o further validation */
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101 continue;
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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102 validate_chunk(&obj);
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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103 validate_obj_name(&obj);
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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104 if (path_prefix + strlen(obj.dataptr) + 2 > sizeof workpath) {
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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105 fprintf(stderr,
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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106 "handling object at index %x, name \"%s\": path buffer overflow\n",
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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107 obj.entryno, (char *)obj.dataptr);
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108 exit(1);
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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109 }
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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110 sprintf(workpath + path_prefix, "/%s", (char *)obj.dataptr);
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111 switch (obj.type) {
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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112 case 0xF2:
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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113 /* directory */
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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114 if (verbose)
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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115 printf("dir: %s\n", workpath);
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116 if (!name_safe_for_extract(&obj)) {
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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117 fprintf(stderr,
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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118 "warning: directory name contains unsafe characters; subtree skipped\n");
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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119 continue;
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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120 }
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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121 if (mkdir(workpath + 1, 0777) < 0) {
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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122 perror(workpath + 1);
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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123 exit(1);
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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124 }
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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125 dump_dir(obj.descend, strlen(workpath));
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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126 continue;
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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127 case 0xF1:
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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128 /* regular file */
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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129 if (verbose)
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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130 printf("file: %s\n", workpath);
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
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131 if (!name_safe_for_extract(&obj)) {
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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132 fprintf(stderr,
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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133 "warning: file name contains unsafe characters; file skipped\n");
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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134 continue;
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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135 }
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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136 extract_file(&obj);
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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137 continue;
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
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138 case 0xE1:
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
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139 /* special .journal file */
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
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140 if (verbose)
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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141 printf("skipping E1 file: %s\n", workpath);
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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142 continue;
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
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143 default:
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
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144 fprintf(stderr,
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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145 "warning: %s (index entry #%x): unexpected type %02X; skipping\n",
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
146 workpath, obj.entryno, obj.type);
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
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147 continue;
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
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148 }
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
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149 }
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
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150 }
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
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151
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
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152 usage()
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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153 {
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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154 fprintf(stderr, "usage: mpffs-xtr [options] ffs-image destdir\n");
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
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155 exit(1);
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
156 }
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
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157
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
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158 main(argc, argv)
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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159 char **argv;
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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160 {
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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161 extern int optind;
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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162
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
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163 parse_cmdline_options(argc, argv);
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
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164 if (argc - optind != 2)
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
165 usage();
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
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166 imgfile = argv[optind];
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
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167 preliminaries();
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
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168 if (chdir(argv[optind+1]) < 0) {
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
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169 perror(argv[optind+1]);
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
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170 exit(1);
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
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171 }
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
172 dump_dir(root.descend, 0);
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
173 exit(0);
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
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174 }