mirror of
https://github.com/sheumann/hush.git
synced 2024-07-08 16:29:02 +00:00
d921b2ecc0
things like xasprintf() into xfuncs.c, remove xprint_file_by_name() (it only had one user), clean up lots of #includes... General cleanup pass. What I've been doing for the last couple days. And it conflicts! I've removed httpd.c from this checkin due to somebody else touching that file. It builds for me. I have to catch a bus. (Now you know why I'm looking forward to Mercurial.)
90 lines
2.2 KiB
C
90 lines
2.2 KiB
C
/* vi: set sw=4 ts=4: */
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/*
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* Mini rpm2cpio implementation for busybox
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*
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* Copyright (C) 2001 by Laurence Anderson
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*
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* Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
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*/
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#include "busybox.h"
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#include "unarchive.h"
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#define RPM_MAGIC "\355\253\356\333"
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#define RPM_HEADER_MAGIC "\216\255\350"
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struct rpm_lead {
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unsigned char magic[4];
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uint8_t major, minor;
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uint16_t type;
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uint16_t archnum;
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char name[66];
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uint16_t osnum;
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uint16_t signature_type;
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char reserved[16];
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};
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struct rpm_header {
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char magic[3]; /* 3 byte magic: 0x8e 0xad 0xe8 */
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uint8_t version; /* 1 byte version number */
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uint32_t reserved; /* 4 bytes reserved */
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uint32_t entries; /* Number of entries in header (4 bytes) */
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uint32_t size; /* Size of store (4 bytes) */
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};
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static void skip_header(int rpm_fd)
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{
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struct rpm_header header;
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xread(rpm_fd, &header, sizeof(struct rpm_header));
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if (strncmp((char *) &header.magic, RPM_HEADER_MAGIC, 3) != 0) {
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bb_error_msg_and_die("Invalid RPM header magic"); /* Invalid magic */
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}
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if (header.version != 1) {
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bb_error_msg_and_die("Unsupported RPM header version"); /* This program only supports v1 headers */
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}
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header.entries = ntohl(header.entries);
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header.size = ntohl(header.size);
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lseek (rpm_fd, 16 * header.entries, SEEK_CUR); /* Seek past index entries */
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lseek (rpm_fd, header.size, SEEK_CUR); /* Seek past store */
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}
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/* No getopt required */
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int rpm2cpio_main(int argc, char **argv)
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{
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struct rpm_lead lead;
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int rpm_fd;
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unsigned char magic[2];
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if (argc == 1) {
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rpm_fd = STDIN_FILENO;
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} else {
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rpm_fd = xopen(argv[1], O_RDONLY);
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}
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xread(rpm_fd, &lead, sizeof(struct rpm_lead));
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if (strncmp((char *) &lead.magic, RPM_MAGIC, 4) != 0) {
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bb_error_msg_and_die("Invalid RPM magic"); /* Just check the magic, the rest is irrelevant */
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}
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/* Skip the signature header */
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skip_header(rpm_fd);
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lseek(rpm_fd, (8 - (lseek(rpm_fd, 0, SEEK_CUR) % 8)) % 8, SEEK_CUR);
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/* Skip the main header */
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skip_header(rpm_fd);
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xread(rpm_fd, &magic, 2);
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if ((magic[0] != 0x1f) || (magic[1] != 0x8b)) {
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bb_error_msg_and_die("Invalid gzip magic");
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}
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check_header_gzip(rpm_fd);
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if (inflate_gunzip(rpm_fd, STDOUT_FILENO) != 0) {
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bb_error_msg("Error inflating");
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}
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close(rpm_fd);
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return 0;
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}
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