1 /* vi: set sw=4 ts=4: */
3 * Mini rpm2cpio implementation for busybox
5 * Copyright (C) 2001 by Laurence Anderson
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
21 #include <sys/types.h>
22 #include <netinet/in.h> /* For ntohl & htonl function */
27 #include "unarchive.h"
29 #define RPM_MAGIC "\355\253\356\333"
30 #define RPM_HEADER_MAGIC "\216\255\350"
33 unsigned char magic[4];
34 u_int8_t major, minor;
39 u_int16_t signature_type;
44 char magic[3]; /* 3 byte magic: 0x8e 0xad 0xe8 */
45 u_int8_t version; /* 1 byte version number */
46 u_int32_t reserved; /* 4 bytes reserved */
47 u_int32_t entries; /* Number of entries in header (4 bytes) */
48 u_int32_t size; /* Size of store (4 bytes) */
51 void skip_header(int rpm_fd)
53 struct rpm_header header;
55 bb_xread_all(rpm_fd, &header, sizeof(struct rpm_header));
56 if (strncmp((char *) &header.magic, RPM_HEADER_MAGIC, 3) != 0) {
57 bb_error_msg_and_die("Invalid RPM header magic"); /* Invalid magic */
59 if (header.version != 1) {
60 bb_error_msg_and_die("Unsupported RPM header version"); /* This program only supports v1 headers */
62 header.entries = ntohl(header.entries);
63 header.size = ntohl(header.size);
64 lseek (rpm_fd, 16 * header.entries, SEEK_CUR); /* Seek past index entries */
65 lseek (rpm_fd, header.size, SEEK_CUR); /* Seek past store */
68 /* No getopt required */
69 extern int rpm2cpio_main(int argc, char **argv)
73 unsigned char magic[2];
76 rpm_fd = fileno(stdin);
78 rpm_fd = bb_xopen(argv[1], O_RDONLY);
81 bb_xread_all(rpm_fd, &lead, sizeof(struct rpm_lead));
82 if (strncmp((char *) &lead.magic, RPM_MAGIC, 4) != 0) {
83 bb_error_msg_and_die("Invalid RPM magic"); /* Just check the magic, the rest is irrelevant */
86 /* Skip the signature header */
88 lseek(rpm_fd, (8 - (lseek(rpm_fd, 0, SEEK_CUR) % 8)) % 8, SEEK_CUR);
90 /* Skip the main header */
93 bb_xread_all(rpm_fd, &magic, 2);
94 if ((magic[0] != 0x1f) || (magic[1] != 0x8b)) {
95 bb_error_msg_and_die("Invalid gzip magic");
98 check_header_gzip(rpm_fd);
99 if (inflate_gunzip(rpm_fd, fileno(stdout)) != 0) {
100 bb_error_msg("Error inflating");