FreeCalypso > hg > freecalypso-reveng
annotate mpffs/xtr.c @ 339:77c86062e253
fluid-mnf/fluid.c: passes compilation
author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Fri, 13 Mar 2020 02:33:21 +0000 |
parents | 7ceab8bfacb3 |
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rev | line source |
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1 /* |
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2 * This module contains the main function and other code specific to mpffs-xtr |
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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 <sys/file.h> |
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7 #include <ctype.h> |
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8 #include <stdio.h> |
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9 #include <string.h> |
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10 #include <strings.h> |
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11 #include <stdlib.h> |
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12 #include <unistd.h> |
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13 #include "types.h" |
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14 #include "struct.h" |
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15 |
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16 extern char *imgfile; |
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17 extern struct objinfo root; |
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18 extern int verbose; |
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19 |
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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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30 if (!isalnum(*s) && *s != '_') |
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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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39 dump_head_chunk(fd, ch) |
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40 struct objinfo *ch; |
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41 { |
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42 u8 *endname, *endchunk; |
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43 |
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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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46 if (endchunk <= endname) |
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47 return; |
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48 write(fd, endname, endchunk - endname); |
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49 } |
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50 |
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51 void |
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52 dump_extra_chunk(ch, opaque) |
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53 struct objinfo *ch; |
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54 u_long opaque; |
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55 { |
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56 int fd = (int) opaque; |
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57 u8 *endchunk; |
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58 |
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59 endchunk = find_end_of_chunk(ch); |
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60 write(fd, ch->dataptr, endchunk - ch->dataptr); |
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61 } |
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62 |
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63 extract_file(head) |
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64 struct objinfo *head; |
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65 { |
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66 int fd; |
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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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70 perror(workpath + 1); |
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71 exit(1); |
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72 } |
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73 dump_head_chunk(fd, head); |
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74 iterate_extra_chunks(head->descend, dump_extra_chunk, (u_long) fd); |
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75 close(fd); |
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76 } |
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77 |
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78 dump_dir(firstent, path_prefix) |
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79 { |
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80 int ent; |
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81 struct objinfo obj; |
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82 |
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83 for (ent = firstent; ent != 0xFFFF; ent = obj.sibling) { |
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84 obj.entryno = ent; |
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85 get_index_entry(&obj); |
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86 if (!obj.type) /* skip deleted objects w/o further validation */ |
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87 continue; |
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88 validate_chunk(&obj); |
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89 validate_obj_name(&obj); |
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90 if (path_prefix + strlen(obj.dataptr) + 2 > sizeof workpath) { |
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91 fprintf(stderr, |
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92 "handling object at index %x, name \"%s\": path buffer overflow\n", |
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93 obj.entryno, (char *)obj.dataptr); |
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94 exit(1); |
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95 } |
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96 sprintf(workpath + path_prefix, "/%s", (char *)obj.dataptr); |
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97 switch (obj.type) { |
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98 case 0xF2: |
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99 /* directory */ |
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100 if (verbose) |
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101 printf("dir: %s\n", workpath); |
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102 if (!name_safe_for_extract(&obj)) { |
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103 fprintf(stderr, |
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104 "warning: directory name contains unsafe characters; subtree skipped\n"); |
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105 continue; |
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106 } |
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107 if (mkdir(workpath + 1, 0777) < 0) { |
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108 perror(workpath + 1); |
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109 exit(1); |
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110 } |
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111 dump_dir(obj.descend, strlen(workpath)); |
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112 continue; |
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113 case 0xF1: |
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114 /* regular file */ |
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115 if (verbose) |
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116 printf("file: %s\n", workpath); |
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117 if (!name_safe_for_extract(&obj)) { |
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118 fprintf(stderr, |
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119 "warning: file name contains unsafe characters; file skipped\n"); |
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120 continue; |
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121 } |
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122 extract_file(&obj); |
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123 continue; |
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124 case 0xE1: |
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125 /* special .journal file */ |
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126 if (verbose) |
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127 printf("skipping E1 file: %s\n", workpath); |
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128 continue; |
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129 default: |
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130 fprintf(stderr, |
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131 "warning: %s (index entry #%x): unexpected type %02X; skipping\n", |
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132 workpath, obj.entryno, obj.type); |
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133 continue; |
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134 } |
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135 } |
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136 } |
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137 |
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138 usage() |
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139 { |
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140 fprintf(stderr, "usage: mpffs-xtr [options] ffs-image destdir\n"); |
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141 exit(1); |
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142 } |
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143 |
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144 main(argc, argv) |
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145 char **argv; |
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146 { |
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147 extern int optind; |
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148 |
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149 parse_cmdline_options(argc, argv); |
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150 if (argc - optind != 2) |
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151 usage(); |
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152 imgfile = argv[optind]; |
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153 preliminaries(); |
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154 if (chdir(argv[optind+1]) < 0) { |
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155 perror(argv[optind+1]); |
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156 exit(1); |
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157 } |
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158 dump_dir(root.descend, 0); |
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159 exit(0); |
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160 } |