FreeCalypso > hg > freecalypso-tools

annotate ffstools/tiffs-rd/xtr.c @ 191:80bd2c652c46

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doc/RF-cal/Architecture document written
author Mychaela Falconia <falcon@freecalypso.org>
date Sun, 23 Apr 2017 18:01:17 +0000
parents e7502631a0f9
children
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0
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1 /*
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2 * This C module implements the xtr command.
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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 <stdio.h>
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8 #include <stdlib.h>
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9 #include <string.h>
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10 #include <strings.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 #include "globals.h"
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15 #include "pathname.h"
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16
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17 static void
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18 dump_head_chunk(fd, headino)
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19 {
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20 struct inode_info *inf = inode_info[headino];
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21 struct chunkinfo chi;
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22
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23 if (size_head_chunk(inf, &chi))
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24 write(fd, chi.start, chi.len);
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25 }
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26
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27 static void
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28 dump_extra_chunk(inf, opaque)
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29 struct inode_info *inf;
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30 u_long opaque;
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31 {
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32 int fd = (int)opaque;
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33 struct chunkinfo chi;
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34
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35 size_extra_chunk(inf, &chi);
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36 write(fd, chi.start, chi.len);
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37 }
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38
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39 extract_file(relpath, headino)
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40 char *relpath;
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41 {
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42 int fd;
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43
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44 fd = open(relpath, O_WRONLY|O_CREAT|O_TRUNC, 0666);
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45 if (fd < 0) {
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46 perror(relpath);
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47 exit(1);
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48 }
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49 dump_head_chunk(fd, headino);
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50 iterate_seg_file(headino, dump_extra_chunk, (u_long)fd, 0, 0);
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51 close(fd);
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52 }
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53
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54 void
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55 xtr_tree_callback(pathname, ino, depth)
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56 char *pathname;
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57 {
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58 struct inode_info *inf = inode_info[ino];
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59
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60 switch (inf->type) {
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61 case 0xE1:
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62 case 0xF1:
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63 /* skip /.journal; those who need it can cat it */
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64 if (strcmp(pathname, "/.journal"))
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65 extract_file(pathname + 1, ino);
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66 return;
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67 case 0xE2:
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68 case 0xF2:
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69 if (mkdir(pathname + 1, 0777) < 0) {
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70 perror(pathname + 1);
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71 exit(1);
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72 }
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73 return;
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74 case 0xE3:
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75 case 0xF3:
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76 fprintf(stderr,
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77 "symlink at %s ignored: symlink extraction not implemented yet\n",
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78 pathname);
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79 return;
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80 default:
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81 fprintf(stderr,
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82 "BUG: bad inode byte %02X reached xtr_tree_callback()\n",
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83 inf->type);
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84 exit(1);
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85 }
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86 }
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87
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88 cmd_xtr(argc, argv)
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89 char **argv;
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90 {
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91 if (argc != 2) {
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92 fprintf(stderr, "usage: xtr dest-dir\n");
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93 exit(1);
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94 }
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95 read_ffs_image();
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96 find_inode_block();
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97 alloc_inode_table();
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98 find_root_inode();
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99 if (chdir(argv[1]) < 0) {
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100 perror(argv[1]);
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101 exit(1);
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102 }
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103 traverse_visible_tree(xtr_tree_callback);
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104 exit(0);
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105 }