source: branches/stable/mindi-busybox/archival/unlzma.c @ 821

Last change on this file since 821 was 821, checked in by Bruno Cornec, 14 years ago

Addition of busybox 1.2.1 as a mindi-busybox new package
This should avoid delivering binary files in mindi not built there (Fedora and Debian are quite serious about that)

File size: 1.5 KB
Line 
1/*
2 * Small lzma deflate implementation.
3 * Copyright (C) 2006  Aurelien Jacobs <aurel@gnuage.org>
4 *
5 * Based on bunzip.c from busybox
6 *
7 * Licensed under GPL v2, see file LICENSE in this tarball for details.
8 */
9
10#include <fcntl.h>
11#include <stdio.h>
12#include <stdlib.h>
13#include <string.h>
14#include <unistd.h>
15
16#include "busybox.h"
17#include "unarchive.h"
18
19#define UNLZMA_OPT_STDOUT   1
20
21int unlzma_main(int argc, char **argv)
22{
23    char *filename;
24    unsigned long opt;
25    int status, src_fd, dst_fd;
26
27    opt = bb_getopt_ulflags(argc, argv, "c");
28
29    /* Set input filename and number */
30    filename = argv[optind];
31    if ((filename) && (filename[0] != '-') && (filename[1] != '\0')) {
32        /* Open input file */
33        src_fd = bb_xopen(filename, O_RDONLY);
34    } else {
35        src_fd = STDIN_FILENO;
36        filename = 0;
37    }
38
39    /* if called as lzmacat force the stdout flag */
40    if ((opt & UNLZMA_OPT_STDOUT) || bb_applet_name[4] == 'c')
41        filename = 0;
42
43    if (filename) {
44        struct stat stat_buf;
45        char *extension = filename + strlen(filename) - 5;
46
47        if (strcmp(extension, ".lzma") != 0) {
48            bb_error_msg_and_die("Invalid extension");
49        }
50        xstat(filename, &stat_buf);
51        *extension = 0;
52        dst_fd = bb_xopen3(filename, O_WRONLY | O_CREAT, stat_buf.st_mode);
53    } else
54        dst_fd = STDOUT_FILENO;
55    status = unlzma(src_fd, dst_fd);
56    if (filename) {
57        if (!status)
58            filename[strlen(filename)] = '.';
59        if (unlink(filename) < 0) {
60            bb_error_msg_and_die("Couldn't remove %s", filename);
61        }
62    }
63
64    return status;
65}
66
67/* vi:set ts=4: */
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