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- /* 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;
- }
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