[821] | 1 | /* vi: set sw=4 ts=4: */
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| 2 | /*
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| 3 | * Mini rpm2cpio implementation for busybox
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| 4 | *
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| 5 | * Copyright (C) 2001 by Laurence Anderson
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| 6 | *
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[2725] | 7 | * Licensed under GPLv2 or later, see file LICENSE in this source tree.
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[821] | 8 | */
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[3232] | 9 |
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[3621] | 10 | //config:config RPM2CPIO
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| 11 | //config: bool "rpm2cpio"
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| 12 | //config: default y
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| 13 | //config: help
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| 14 | //config: Converts a RPM file into a CPIO archive.
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| 15 |
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| 16 | //applet:IF_RPM2CPIO(APPLET(rpm2cpio, BB_DIR_USR_BIN, BB_SUID_DROP))
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| 17 | //kbuild:lib-$(CONFIG_RPM2CPIO) += rpm2cpio.o
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| 18 |
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[3232] | 19 | //usage:#define rpm2cpio_trivial_usage
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| 20 | //usage: "package.rpm"
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| 21 | //usage:#define rpm2cpio_full_usage "\n\n"
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| 22 | //usage: "Output a cpio archive of the rpm file"
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| 23 |
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[1765] | 24 | #include "libbb.h"
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[3232] | 25 | #include "bb_archive.h"
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[2725] | 26 | #include "rpm.h"
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[821] | 27 |
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[2725] | 28 | enum { rpm_fd = STDIN_FILENO };
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[821] | 29 |
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[2725] | 30 | static unsigned skip_header(void)
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[821] | 31 | {
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| 32 | struct rpm_header header;
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[2725] | 33 | unsigned len;
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[821] | 34 |
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[2725] | 35 | xread(rpm_fd, &header, sizeof(header));
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| 36 | // if (strncmp((char *) &header.magic, RPM_HEADER_MAGIC_STR, 3) != 0) {
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| 37 | // bb_error_msg_and_die("invalid RPM header magic");
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| 38 | // }
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| 39 | // if (header.version != 1) {
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| 40 | // bb_error_msg_and_die("unsupported RPM header version");
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| 41 | // }
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| 42 | if (header.magic_and_ver != htonl(RPM_HEADER_MAGICnVER)) {
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| 43 | bb_error_msg_and_die("invalid RPM header magic or unsupported version");
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| 44 | // ": %x != %x", header.magic_and_ver, htonl(RPM_HEADER_MAGICnVER));
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[821] | 45 | }
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[2725] | 46 |
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| 47 | /* Seek past index entries, and past store */
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| 48 | len = 16 * ntohl(header.entries) + ntohl(header.size);
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| 49 | seek_by_jump(rpm_fd, len);
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| 50 |
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| 51 | return sizeof(header) + len;
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[821] | 52 | }
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| 53 |
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| 54 | /* No getopt required */
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[2725] | 55 | int rpm2cpio_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
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| 56 | int rpm2cpio_main(int argc UNUSED_PARAM, char **argv)
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[821] | 57 | {
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| 58 | struct rpm_lead lead;
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[2725] | 59 | unsigned pos;
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[821] | 60 |
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[2725] | 61 | if (argv[1]) {
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| 62 | xmove_fd(xopen(argv[1], O_RDONLY), rpm_fd);
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[821] | 63 | }
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[2725] | 64 | xread(rpm_fd, &lead, sizeof(lead));
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[821] | 65 |
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[2725] | 66 | /* Just check the magic, the rest is irrelevant */
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| 67 | if (lead.magic != htonl(RPM_LEAD_MAGIC)) {
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| 68 | bb_error_msg_and_die("invalid RPM magic");
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[821] | 69 | }
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| 70 |
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[2725] | 71 | /* Skip the signature header, align to 8 bytes */
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| 72 | pos = skip_header();
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| 73 | seek_by_jump(rpm_fd, (-(int)pos) & 7);
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[821] | 74 |
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| 75 | /* Skip the main header */
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[2725] | 76 | skip_header();
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[821] | 77 |
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[3232] | 78 | //if (SEAMLESS_COMPRESSION)
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| 79 | // /* We need to know whether child (gzip/bzip/etc) exits abnormally */
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| 80 | // signal(SIGCHLD, check_errors_in_children);
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| 81 |
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[2725] | 82 | /* This works, but doesn't report uncompress errors (they happen in child) */
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[3621] | 83 | setup_unzip_on_fd(rpm_fd, /*fail_if_not_compressed:*/ 1);
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[2725] | 84 | if (bb_copyfd_eof(rpm_fd, STDOUT_FILENO) < 0)
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| 85 | bb_error_msg_and_die("error unpacking");
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| 86 |
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| 87 | if (ENABLE_FEATURE_CLEAN_UP) {
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| 88 | close(rpm_fd);
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[821] | 89 | }
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| 90 |
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[3232] | 91 | if (SEAMLESS_COMPRESSION) {
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| 92 | check_errors_in_children(0);
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| 93 | return bb_got_signal;
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| 94 | }
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| 95 | return EXIT_SUCCESS;
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[821] | 96 | }
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