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comparison ffstools/tiffs-rd/xtr.c @ 0:e7502631a0f9

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initial import from freecalypso-sw rev 1033:5ab737ac3ad7
author Mychaela Falconia <falcon@freecalypso.org>
date Sat, 11 Jun 2016 00:13:35 +0000
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-1:000000000000 0:e7502631a0f9
1 /*
2 * This C module implements the xtr command.
3 */
4
5 #include <sys/types.h>
6 #include <sys/file.h>
7 #include <stdio.h>
8 #include <stdlib.h>
9 #include <string.h>
10 #include <strings.h>
11 #include <unistd.h>
12 #include "types.h"
13 #include "struct.h"
14 #include "globals.h"
15 #include "pathname.h"
16
17 static void
18 dump_head_chunk(fd, headino)
19 {
20 struct inode_info *inf = inode_info[headino];
21 struct chunkinfo chi;
22
23 if (size_head_chunk(inf, &chi))
24 write(fd, chi.start, chi.len);
25 }
26
27 static void
28 dump_extra_chunk(inf, opaque)
29 struct inode_info *inf;
30 u_long opaque;
31 {
32 int fd = (int)opaque;
33 struct chunkinfo chi;
34
35 size_extra_chunk(inf, &chi);
36 write(fd, chi.start, chi.len);
37 }
38
39 extract_file(relpath, headino)
40 char *relpath;
41 {
42 int fd;
43
44 fd = open(relpath, O_WRONLY|O_CREAT|O_TRUNC, 0666);
45 if (fd < 0) {
46 perror(relpath);
47 exit(1);
48 }
49 dump_head_chunk(fd, headino);
50 iterate_seg_file(headino, dump_extra_chunk, (u_long)fd, 0, 0);
51 close(fd);
52 }
53
54 void
55 xtr_tree_callback(pathname, ino, depth)
56 char *pathname;
57 {
58 struct inode_info *inf = inode_info[ino];
59
60 switch (inf->type) {
61 case 0xE1:
62 case 0xF1:
63 /* skip /.journal; those who need it can cat it */
64 if (strcmp(pathname, "/.journal"))
65 extract_file(pathname + 1, ino);
66 return;
67 case 0xE2:
68 case 0xF2:
69 if (mkdir(pathname + 1, 0777) < 0) {
70 perror(pathname + 1);
71 exit(1);
72 }
73 return;
74 case 0xE3:
75 case 0xF3:
76 fprintf(stderr,
77 "symlink at %s ignored: symlink extraction not implemented yet\n",
78 pathname);
79 return;
80 default:
81 fprintf(stderr,
82 "BUG: bad inode byte %02X reached xtr_tree_callback()\n",
83 inf->type);
84 exit(1);
85 }
86 }
87
88 cmd_xtr(argc, argv)
89 char **argv;
90 {
91 if (argc != 2) {
92 fprintf(stderr, "usage: xtr dest-dir\n");
93 exit(1);
94 }
95 read_ffs_image();
96 find_inode_block();
97 alloc_inode_table();
98 find_root_inode();
99 if (chdir(argv[1]) < 0) {
100 perror(argv[1]);
101 exit(1);
102 }
103 traverse_visible_tree(xtr_tree_callback);
104 exit(0);
105 }