Contents of /trunk/mkinitrd-magellan/busybox/archival/unlzma.c
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Sat Sep 1 22:45:15 2007 UTC (16 years, 8 months ago) by niro
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Sat Sep 1 22:45:15 2007 UTC (16 years, 8 months ago) by niro
File MIME type: text/plain
File size: 1587 byte(s)
-import if magellan mkinitrd; it is a fork of redhats mkinitrd-5.0.8 with all magellan patches and features; deprecates magellan-src/mkinitrd
1 | /* vi: set sw=4 ts=4: */ |
2 | /* |
3 | * Small lzma deflate implementation. |
4 | * Copyright (C) 2006 Aurelien Jacobs <aurel@gnuage.org> |
5 | * |
6 | * Based on bunzip.c from busybox |
7 | * |
8 | * Licensed under GPL v2, see file LICENSE in this tarball for details. |
9 | */ |
10 | |
11 | /* Why our g[un]zip/bunzip2 are so ugly compared to this beauty? */ |
12 | |
13 | #include "busybox.h" |
14 | #include "unarchive.h" |
15 | |
16 | #define UNLZMA_OPT_STDOUT 1 |
17 | |
18 | int unlzma_main(int argc, char **argv) |
19 | { |
20 | USE_DESKTOP(long long) int status; |
21 | char *filename; |
22 | unsigned opt; |
23 | int src_fd, dst_fd; |
24 | |
25 | opt = getopt32(argc, argv, "c"); |
26 | |
27 | /* Set input filename and number */ |
28 | filename = argv[optind]; |
29 | if (filename && NOT_LONE_DASH(filename)) { |
30 | /* Open input file */ |
31 | src_fd = xopen(filename, O_RDONLY); |
32 | } else { |
33 | src_fd = STDIN_FILENO; |
34 | filename = 0; |
35 | } |
36 | |
37 | /* if called as lzmacat force the stdout flag */ |
38 | if ((opt & UNLZMA_OPT_STDOUT) || applet_name[4] == 'c') |
39 | filename = 0; |
40 | |
41 | if (filename) { |
42 | struct stat stat_buf; |
43 | /* bug: char *extension = filename + strlen(filename) - 5; */ |
44 | char *extension = strrchr(filename, '.'); |
45 | if (!extension || strcmp(extension, ".lzma") != 0) { |
46 | bb_error_msg_and_die("invalid extension"); |
47 | } |
48 | xstat(filename, &stat_buf); |
49 | *extension = '\0'; |
50 | dst_fd = xopen3(filename, O_WRONLY | O_CREAT | O_TRUNC, |
51 | stat_buf.st_mode); |
52 | } else |
53 | dst_fd = STDOUT_FILENO; |
54 | status = unlzma(src_fd, dst_fd); |
55 | if (filename) { |
56 | if (status >= 0) /* if success delete src, else delete dst */ |
57 | filename[strlen(filename)] = '.'; |
58 | if (unlink(filename) < 0) { |
59 | bb_error_msg_and_die("cannot remove %s", filename); |
60 | } |
61 | } |
62 | |
63 | return (status < 0); |
64 | } |