source: MondoRescue/branches/stable/mindi-busybox/archival/bunzip2.c @ 821

Last change on this file since 821 was 821, checked in by Bruno Cornec, 13 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: 1.7 KB
Line 
1/*
2 *  Modified for busybox by Glenn McGrath <bug1@iinet.net.au>
3 *  Added support output to stdout by Thomas Lundquist <thomasez@zelow.no>
4 *
5 *  Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
6 */
7
8#include <fcntl.h>
9#include <stdio.h>
10#include <stdlib.h>
11#include <string.h>
12#include <unistd.h>
13
14#include "busybox.h"
15#include "unarchive.h"
16
17#define BUNZIP2_OPT_STDOUT  1
18#define BUNZIP2_OPT_FORCE   2
19
20int bunzip2_main(int argc, char **argv)
21{
22    char *filename;
23    unsigned long opt;
24    int status, src_fd, dst_fd;
25
26    opt = bb_getopt_ulflags(argc, argv, "cf");
27
28    /* Set input filename and number */
29    filename = argv[optind];
30    if ((filename) && (filename[0] != '-') && (filename[1] != '\0')) {
31        /* Open input file */
32        src_fd = bb_xopen(filename, O_RDONLY);
33    } else {
34        src_fd = STDIN_FILENO;
35        filename = 0;
36    }
37
38    /* if called as bzcat force the stdout flag */
39    if ((opt & BUNZIP2_OPT_STDOUT) || bb_applet_name[2] == 'c')
40        filename = 0;
41
42    /* Check that the input is sane.  */
43    if (isatty(src_fd) && (opt & BUNZIP2_OPT_FORCE) == 0) {
44        bb_error_msg_and_die("Compressed data not read from terminal.  Use -f to force it.");
45    }
46
47    if (filename) {
48        struct stat stat_buf;
49        char *extension=filename+strlen(filename)-4;
50        if (strcmp(extension, ".bz2") != 0) {
51            bb_error_msg_and_die("Invalid extension");
52        }
53        xstat(filename, &stat_buf);
54        *extension=0;
55        dst_fd = bb_xopen3(filename, O_WRONLY | O_CREAT, stat_buf.st_mode);
56    } else dst_fd = STDOUT_FILENO;
57    status = uncompressStream(src_fd, dst_fd);
58    if(filename) {
59        if (!status) filename[strlen(filename)]='.';
60        if (unlink(filename) < 0) {
61            bb_error_msg_and_die("Couldn't remove %s", filename);
62        }
63    }
64
65    return status;
66}
67/* vi:set ts=4: */
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