source: branches/3.2/mindi-busybox/archival/rpm2cpio.c @ 3232

Last change on this file since 3232 was 3232, checked in by bruno, 6 years ago
  • Update mindi-busybox to 1.21.1
File size: 2.3 KB
Line 
1/* vi: set sw=4 ts=4: */
2/*
3 * Mini rpm2cpio implementation for busybox
4 *
5 * Copyright (C) 2001 by Laurence Anderson
6 *
7 * Licensed under GPLv2 or later, see file LICENSE in this source tree.
8 */
9
10//usage:#define rpm2cpio_trivial_usage
11//usage:       "package.rpm"
12//usage:#define rpm2cpio_full_usage "\n\n"
13//usage:       "Output a cpio archive of the rpm file"
14
15#include "libbb.h"
16#include "bb_archive.h"
17#include "rpm.h"
18
19enum { rpm_fd = STDIN_FILENO };
20
21static unsigned skip_header(void)
22{
23    struct rpm_header header;
24    unsigned len;
25
26    xread(rpm_fd, &header, sizeof(header));
27//  if (strncmp((char *) &header.magic, RPM_HEADER_MAGIC_STR, 3) != 0) {
28//      bb_error_msg_and_die("invalid RPM header magic");
29//  }
30//  if (header.version != 1) {
31//      bb_error_msg_and_die("unsupported RPM header version");
32//  }
33    if (header.magic_and_ver != htonl(RPM_HEADER_MAGICnVER)) {
34        bb_error_msg_and_die("invalid RPM header magic or unsupported version");
35        // ": %x != %x", header.magic_and_ver, htonl(RPM_HEADER_MAGICnVER));
36    }
37
38    /* Seek past index entries, and past store */
39    len = 16 * ntohl(header.entries) + ntohl(header.size);
40    seek_by_jump(rpm_fd, len);
41
42    return sizeof(header) + len;
43}
44
45/* No getopt required */
46int rpm2cpio_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
47int rpm2cpio_main(int argc UNUSED_PARAM, char **argv)
48{
49    struct rpm_lead lead;
50    unsigned pos;
51
52    if (argv[1]) {
53        xmove_fd(xopen(argv[1], O_RDONLY), rpm_fd);
54    }
55    xread(rpm_fd, &lead, sizeof(lead));
56
57    /* Just check the magic, the rest is irrelevant */
58    if (lead.magic != htonl(RPM_LEAD_MAGIC)) {
59        bb_error_msg_and_die("invalid RPM magic");
60    }
61
62    /* Skip the signature header, align to 8 bytes */
63    pos = skip_header();
64    seek_by_jump(rpm_fd, (-(int)pos) & 7);
65
66    /* Skip the main header */
67    skip_header();
68
69    //if (SEAMLESS_COMPRESSION)
70    //  /* We need to know whether child (gzip/bzip/etc) exits abnormally */
71    //  signal(SIGCHLD, check_errors_in_children);
72
73    /* This works, but doesn't report uncompress errors (they happen in child) */
74    setup_unzip_on_fd(rpm_fd, /*fail_if_not_detected:*/ 1);
75    if (bb_copyfd_eof(rpm_fd, STDOUT_FILENO) < 0)
76        bb_error_msg_and_die("error unpacking");
77
78    if (ENABLE_FEATURE_CLEAN_UP) {
79        close(rpm_fd);
80    }
81
82    if (SEAMLESS_COMPRESSION) {
83        check_errors_in_children(0);
84        return bb_got_signal;
85    }
86    return EXIT_SUCCESS;
87}
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