static char FAST_FUNC get_header_tar_Z(archive_handle_t *archive_handle)
{
/* Can't lseek over pipes */
archive_handle->seek = seek_by_read;
/* do the decompression, and cleanup */
if (xread_char(archive_handle->src_fd) != 0x1f
|| xread_char(archive_handle->src_fd) != 0x9d
) {
bb_error_msg_and_die("invalid magic");
}
open_transformer(archive_handle->src_fd, unpack_Z_stream, "uncompress");
archive_handle->offset = 0;
while (get_header_tar(archive_handle) == EXIT_SUCCESS)
continue;
/* Can only do one file at a time */
return EXIT_FAILURE;
}
void check_header_gzip(int src_fd)
{
union {
unsigned char raw[8];
struct {
unsigned char method;
unsigned char flags;
unsigned int mtime;
unsigned char xtra_flags;
unsigned char os_flags;
} formatted;
} header;
xread(src_fd, header.raw, 8);
/* Check the compression method */
if (header.formatted.method != 8)
/* error_die("Unknown compression method %d", header.formatted.method);*/
error_die("Unknown compression method");
if (header.formatted.flags & 0x04)
{
/* bit 2 set: extra field present */
unsigned char extra_short;
extra_short = xread_char(src_fd) + (xread_char(src_fd) << 8);
while (extra_short > 0)
{
/* Ignore extra field */
xread_char(src_fd);
extra_short--;
}
}
/* Discard original name if any */
if (header.formatted.flags & 0x08)
/* bit 3 set: original file name present */
while(xread_char(src_fd) != 0) ;
/* Discard file comment if any */
if (header.formatted.flags & 0x10)
/* bit 4 set: file comment present */
while(xread_char(src_fd) != 0) ;
/* Read the header checksum */
if (header.formatted.flags & 0x02)
{
xread_char(src_fd);
xread_char(src_fd);
}
}
