1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
|
/* vi: set sw=4 ts=4: */
/*
* Mini rpm2cpio implementation for busybox
*
* Copyright (C) 2001 by Laurence Anderson
*
* Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
*/
#include "libbb.h"
#include "unarchive.h"
#include "rpm.h"
enum { rpm_fd = STDIN_FILENO };
static unsigned skip_header(void)
{
struct rpm_header header;
unsigned len;
xread(rpm_fd, &header, sizeof(header));
// if (strncmp((char *) &header.magic, RPM_HEADER_MAGIC_STR, 3) != 0) {
// bb_error_msg_and_die("invalid RPM header magic");
// }
// if (header.version != 1) {
// bb_error_msg_and_die("unsupported RPM header version");
// }
if (header.magic_and_ver != htonl(RPM_HEADER_MAGICnVER)) {
bb_error_msg_and_die("invalid RPM header magic or unsupported version");
// ": %x != %x", header.magic_and_ver, htonl(RPM_HEADER_MAGICnVER));
}
/* Seek past index entries, and past store */
len = 16 * ntohl(header.entries) + ntohl(header.size);
seek_by_jump(rpm_fd, len);
return sizeof(header) + len;
}
/* No getopt required */
int rpm2cpio_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
int rpm2cpio_main(int argc UNUSED_PARAM, char **argv)
{
struct rpm_lead lead;
unsigned pos;
if (argv[1]) {
xmove_fd(xopen(argv[1], O_RDONLY), rpm_fd);
}
xread(rpm_fd, &lead, sizeof(lead));
/* Just check the magic, the rest is irrelevant */
if (lead.magic != htonl(RPM_LEAD_MAGIC)) {
bb_error_msg_and_die("invalid RPM magic");
}
/* Skip the signature header, align to 8 bytes */
pos = skip_header();
seek_by_jump(rpm_fd, (-(int)pos) & 7);
/* Skip the main header */
skip_header();
#if 0
/* This works, but doesn't report uncompress errors (they happen in child) */
setup_unzip_on_fd(rpm_fd /*fail_if_not_detected: 1*/);
if (bb_copyfd_eof(rpm_fd, STDOUT_FILENO) < 0)
bb_error_msg_and_die("error unpacking");
#else
/* BLOAT */
{
unsigned char magic[2];
IF_DESKTOP(long long) int FAST_FUNC (*unpack)(int src_fd, int dst_fd);
xread(rpm_fd, &magic, 2);
unpack = unpack_gz_stream;
if (magic[0] != 0x1f || magic[1] != 0x8b) {
if (!ENABLE_FEATURE_SEAMLESS_BZ2
|| magic[0] != 'B' || magic[1] != 'Z'
) {
bb_error_msg_and_die("invalid gzip"
IF_FEATURE_SEAMLESS_BZ2("/bzip2")
" magic");
}
unpack = unpack_bz2_stream;
}
if (unpack(rpm_fd, STDOUT_FILENO) < 0)
bb_error_msg_and_die("error unpacking");
}
#endif
if (ENABLE_FEATURE_CLEAN_UP) {
close(rpm_fd);
}
return 0;
}
|
