*
* Copyright (C) 2001 by Laurence Anderson
*
- * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
+ * Licensed under GPLv2 or later, see file LICENSE in this source tree.
*/
#include "libbb.h"
-#include "unarchive.h"
+#include "archive.h"
+#include "rpm.h"
-#define RPM_MAGIC "\355\253\356\333"
-#define RPM_HEADER_MAGIC "\216\255\350"
+enum { rpm_fd = STDIN_FILENO };
-struct rpm_lead {
- unsigned char magic[4];
- uint8_t major, minor;
- uint16_t type;
- uint16_t archnum;
- char name[66];
- uint16_t osnum;
- uint16_t signature_type;
- char reserved[16];
-};
-
-struct rpm_header {
- char magic[3]; /* 3 byte magic: 0x8e 0xad 0xe8 */
- uint8_t version; /* 1 byte version number */
- uint32_t reserved; /* 4 bytes reserved */
- uint32_t entries; /* Number of entries in header (4 bytes) */
- uint32_t size; /* Size of store (4 bytes) */
-};
-
-static void skip_header(int rpm_fd)
+static unsigned skip_header(void)
{
struct rpm_header header;
+ unsigned len;
- xread(rpm_fd, &header, sizeof(struct rpm_header));
- if (strncmp((char *) &header.magic, RPM_HEADER_MAGIC, 3) != 0) {
- bb_error_msg_and_die("invalid RPM header magic"); /* Invalid magic */
+ 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));
}
- if (header.version != 1) {
- bb_error_msg_and_die("unsupported RPM header version"); /* This program only supports v1 headers */
- }
- header.entries = ntohl(header.entries);
- header.size = ntohl(header.size);
- lseek (rpm_fd, 16 * header.entries, SEEK_CUR); /* Seek past index entries */
- lseek (rpm_fd, header.size, SEEK_CUR); /* Seek past store */
+
+ /* 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);
-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 rpm_fd;
- unsigned char magic[2];
+ unsigned pos;
- if (argc == 1) {
- rpm_fd = STDIN_FILENO;
- } else {
- rpm_fd = xopen(argv[1], O_RDONLY);
+ if (argv[1]) {
+ xmove_fd(xopen(argv[1], O_RDONLY), rpm_fd);
}
+ xread(rpm_fd, &lead, sizeof(lead));
- xread(rpm_fd, &lead, sizeof(struct rpm_lead));
- if (strncmp((char *) &lead.magic, RPM_MAGIC, 4) != 0) {
- bb_error_msg_and_die("invalid RPM magic"); /* Just check the magic, the rest is irrelevant */
+ /* 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 */
- skip_header(rpm_fd);
- lseek(rpm_fd, (8 - (lseek(rpm_fd, 0, SEEK_CUR) % 8)) % 8, SEEK_CUR);
+ /* 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(rpm_fd);
+ skip_header();
- xread(rpm_fd, &magic, 2);
- if ((magic[0] != 0x1f) || (magic[1] != 0x8b)) {
- bb_error_msg_and_die("invalid gzip magic");
- }
+#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 */
+ {
+ union {
+ uint8_t b[4];
+ uint16_t b16[2];
+ uint32_t b32[1];
+ } magic;
+ IF_DESKTOP(long long) int FAST_FUNC (*unpack)(int src_fd, int dst_fd);
- check_header_gzip_or_die(rpm_fd);
- if (inflate_gunzip(rpm_fd, STDOUT_FILENO) < 0) {
- bb_error_msg("error inflating");
+ xread(rpm_fd, magic.b16, sizeof(magic.b16[0]));
+ if (magic.b16[0] == GZIP_MAGIC) {
+ unpack = unpack_gz_stream;
+ } else
+ if (ENABLE_FEATURE_SEAMLESS_BZ2
+ && magic.b16[0] == BZIP2_MAGIC
+ ) {
+ unpack = unpack_bz2_stream;
+ } else
+ if (ENABLE_FEATURE_SEAMLESS_XZ
+ && magic.b16[0] == XZ_MAGIC1
+ ) {
+ xread(rpm_fd, magic.b32, sizeof(magic.b32[0]));
+ if (magic.b32[0] != XZ_MAGIC2)
+ goto no_magic;
+ /* unpack_xz_stream wants fd at position 6, no need to seek */
+ //xlseek(rpm_fd, -6, SEEK_CUR);
+ unpack = unpack_xz_stream;
+ } else {
+ no_magic:
+ bb_error_msg_and_die("no gzip"
+ IF_FEATURE_SEAMLESS_BZ2("/bzip2")
+ IF_FEATURE_SEAMLESS_XZ("/xz")
+ " magic");
+ }
+ if (unpack(rpm_fd, STDOUT_FILENO) < 0)
+ bb_error_msg_and_die("error unpacking");
}
+#endif
- close(rpm_fd);
+ if (ENABLE_FEATURE_CLEAN_UP) {
+ close(rpm_fd);
+ }
return 0;
}
projects / platform / upstream / busybox.git / blobdiff