1 /* vi: set sw=4 ts=4: */
3 * Mini rpm2cpio implementation for busybox
5 * Copyright (C) 2001 by Laurence Anderson
7 * Licensed under GPLv2 or later, see file LICENSE in this source tree.
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"
16 #include "bb_archive.h"
19 enum { rpm_fd
= STDIN_FILENO
};
21 static unsigned skip_header(void)
23 struct rpm_header header
;
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");
30 // if (header.version != 1) {
31 // bb_error_msg_and_die("unsupported RPM header version");
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));
38 /* Seek past index entries, and past store */
39 len
= 16 * ntohl(header
.entries
) + ntohl(header
.size
);
40 seek_by_jump(rpm_fd
, len
);
42 return sizeof(header
) + len
;
45 /* No getopt required */
46 int rpm2cpio_main(int argc
, char **argv
) MAIN_EXTERNALLY_VISIBLE
;
47 int rpm2cpio_main(int argc UNUSED_PARAM
, char **argv
)
53 xmove_fd(xopen(argv
[1], O_RDONLY
), rpm_fd
);
55 xread(rpm_fd
, &lead
, sizeof(lead
));
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");
62 /* Skip the signature header, align to 8 bytes */
64 seek_by_jump(rpm_fd
, (-(int)pos
) & 7);
66 /* Skip the main header */
69 //if (SEAMLESS_COMPRESSION)
70 // /* We need to know whether child (gzip/bzip/etc) exits abnormally */
71 // signal(SIGCHLD, check_errors_in_children);
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");
78 if (ENABLE_FEATURE_CLEAN_UP
) {
82 if (SEAMLESS_COMPRESSION
) {
83 check_errors_in_children(0);