*
* Copyright (C) 2001 by Laurence Anderson
*
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
*/
+#include "libbb.h"
+#include "unarchive.h"
+#include "rpm.h"
-#include "busybox.h"
-#include <netinet/in.h> /* For ntohl & htonl function */
-#include <string.h>
-
-#define RPM_MAGIC "\355\253\356\333"
-#define RPM_HEADER_MAGIC "\216\255\350"
-
-struct rpm_lead {
- unsigned char magic[4];
- u_int8_t major, minor;
- u_int16_t type;
- u_int16_t archnum;
- char name[66];
- u_int16_t osnum;
- u_int16_t signature_type;
- char reserved[16];
-};
+enum { rpm_fd = STDIN_FILENO };
-struct rpm_header {
- char magic[3]; /* 3 byte magic: 0x8e 0xad 0xe8 */
- u_int8_t version; /* 1 byte version number */
- u_int32_t reserved; /* 4 bytes reserved */
- u_int32_t entries; /* Number of entries in header (4 bytes) */
- u_int32_t size; /* Size of store (4 bytes) */
-};
-
-void skip_header(FILE *rpmfile)
+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);
- fread(&header, sizeof(struct rpm_header), 1, rpmfile);
- if (strncmp((char *) &header.magic, RPM_HEADER_MAGIC, 3) != 0) error_msg_and_die("Invalid RPM header magic"); /* Invalid magic */
- if (header.version != 1) error_msg_and_die("Unsupported RPM header version"); /* This program only supports v1 headers */
- header.entries = ntohl(header.entries);
- header.size = ntohl(header.size);
- fseek (rpmfile, 16 * header.entries, SEEK_CUR); /* Seek past index entries */
- fseek (rpmfile, header.size, SEEK_CUR); /* Seek past store */
+ return sizeof(header) + len;
}
/* No getopt required */
-extern int rpm2cpio_main(int argc, char **argv)
+int rpm2cpio_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
+int rpm2cpio_main(int argc UNUSED_PARAM, char **argv)
{
struct rpm_lead lead;
- int gunzip_pid;
- FILE *rpmfile, *cpiofile;
+ unsigned pos;
- if (argc == 1) {
- rpmfile = stdin;
- } else {
- rpmfile = xfopen(argv[1], "r");
- /* set the buffer size */
- setvbuf(rpmfile, NULL, _IOFBF, 0x8000);
+ 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);
- fread (&lead, sizeof(struct rpm_lead), 1, rpmfile);
- if (strncmp((char *) &lead.magic, RPM_MAGIC, 4) != 0) error_msg_and_die("Invalid RPM magic"); /* Just check the magic, the rest is irrelevant */
- /* Skip the signature header */
- skip_header(rpmfile);
- fseek(rpmfile, (8 - (ftell(rpmfile) % 8)) % 8, SEEK_CUR); /* Pad to 8 byte boundary */
/* Skip the main header */
- skip_header(rpmfile);
+ 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);
- cpiofile = gz_open(rpmfile, &gunzip_pid);
+ 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);
+ }
- copyfd(fileno(cpiofile), fileno(stdout));
- gz_close(gunzip_pid);
- fclose(rpmfile);
return 0;
}