9be166b5dd
function old new delta rpm_getstr0 - 7 +7 rpm_getstr 112 110 -2 rpm_getint 120 118 -2 bsearch_rpmtag 15 13 -2 shell_builtin_read 1334 1320 -14 rpm_main 1548 1474 -74 ------------------------------------------------------------------------------ (add/remove: 1/0 grow/shrink: 0/5 up/down: 7/-94) Total: -87 bytes Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
100 lines
2.6 KiB
C
100 lines
2.6 KiB
C
/* 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 source tree.
|
|
*/
|
|
|
|
//config:config RPM2CPIO
|
|
//config: bool "rpm2cpio (20 kb)"
|
|
//config: default y
|
|
//config: help
|
|
//config: Converts a RPM file into a CPIO archive.
|
|
|
|
//applet:IF_RPM2CPIO(APPLET(rpm2cpio, BB_DIR_USR_BIN, BB_SUID_DROP))
|
|
//kbuild:lib-$(CONFIG_RPM2CPIO) += rpm2cpio.o
|
|
|
|
//usage:#define rpm2cpio_trivial_usage
|
|
//usage: "package.rpm"
|
|
//usage:#define rpm2cpio_full_usage "\n\n"
|
|
//usage: "Output a cpio archive of the rpm file"
|
|
|
|
#include "libbb.h"
|
|
#include "bb_archive.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 (SEAMLESS_COMPRESSION) - we do this at the end instead.
|
|
// /* We need to know whether child (gzip/bzip/etc) exits abnormally */
|
|
// signal(SIGCHLD, check_errors_in_children);
|
|
|
|
//TODO: look for rpm tag RPMTAG_PAYLOADCOMPRESSOR (dec 1125, hex 0x465),
|
|
// if the value is "lzma", set up decompressor without detection
|
|
// (lzma can't be detected).
|
|
|
|
setup_unzip_on_fd(rpm_fd, /*fail_if_not_compressed:*/ 1);
|
|
if (bb_copyfd_eof(rpm_fd, STDOUT_FILENO) < 0)
|
|
bb_error_msg_and_die("error unpacking");
|
|
|
|
if (ENABLE_FEATURE_CLEAN_UP) {
|
|
close(rpm_fd);
|
|
}
|
|
|
|
if (SEAMLESS_COMPRESSION) {
|
|
check_errors_in_children(0);
|
|
return bb_got_signal;
|
|
}
|
|
return EXIT_SUCCESS;
|
|
}
|