diff -wur busybox-1.11.0/archival/Config.in busybox-1.11.0-patched/archival/Config.in
--- busybox-1.11.0/archival/Config.in	2008-06-25 14:51:26.000000000 +0200
+++ busybox-1.11.0-patched/archival/Config.in	2008-07-10 17:53:29.000000000 +0200
@@ -145,6 +145,14 @@
 	help
 	  Converts an RPM file into a CPIO archive.
 
+config FEATURE_RPM2CPIO_BZIP2
+	bool "  Support bzip2 decompression"
+	default n
+	depends on RPM2CPIO
+	help
+	  If you enable this option you'll be able to extract
+	  rpms compressed with bzip2.
+
 config RPM
 	bool "rpm"
 	default n
Only in busybox-1.11.0-patched/archival: Config.in.orig
diff -wur busybox-1.11.0/archival/libunarchive/Kbuild busybox-1.11.0-patched/archival/libunarchive/Kbuild
--- busybox-1.11.0/archival/libunarchive/Kbuild	2008-06-25 14:51:26.000000000 +0200
+++ busybox-1.11.0-patched/archival/libunarchive/Kbuild	2008-07-10 17:53:29.000000000 +0200
@@ -55,6 +55,7 @@
 lib-$(CONFIG_GUNZIP)                    += decompress_unzip.o
 lib-$(CONFIG_FEATURE_GUNZIP_UNCOMPRESS) += decompress_uncompress.o
 lib-$(CONFIG_RPM2CPIO)                  += decompress_unzip.o get_header_cpio.o
+lib-$(CONFIG_FEATURE_RPM2CPIO_BZIP2)    += $(GUNZIP_FILES) decompress_bunzip2.o
 lib-$(CONFIG_RPM)                       += decompress_unzip.o get_header_cpio.o
 lib-$(CONFIG_FEATURE_RPM_BZ2)           += decompress_bunzip2.o
 lib-$(CONFIG_TAR)                       += get_header_tar.o
diff -wur busybox-1.11.0/archival/rpm2cpio.c busybox-1.11.0-patched/archival/rpm2cpio.c
--- busybox-1.11.0/archival/rpm2cpio.c	2008-06-25 14:51:26.000000000 +0200
+++ busybox-1.11.0-patched/archival/rpm2cpio.c	2008-07-10 17:53:29.000000000 +0200
@@ -75,13 +75,23 @@
 	skip_header(rpm_fd);
 
 	xread(rpm_fd, &magic, 2);
-	if ((magic[0] != 0x1f) || (magic[1] != 0x8b)) {
-		bb_error_msg_and_die("invalid gzip magic");
-	}
-
+	if ((magic[0] == 0x1f) && (magic[1] == 0x8b)) {
 	if (unpack_gz_stream(rpm_fd, STDOUT_FILENO) < 0) {
-		bb_error_msg("error inflating");
+			bb_error_msg("error inflating (gzip)");
+		}
+	}
+	else if ((magic[0] == 'B') && (magic[1] == 'Z')) {
+#ifdef CONFIG_FEATURE_RPM2CPIO_BZIP2
+		/* return to position before magic (eek..!) */
+		lseek(rpm_fd, -2, SEEK_CUR);
+		if (unpack_bz2_stream(rpm_fd, fileno(stdout)) != 0)
+			bb_error_msg("error inflating (bzip2)");
+#else
+		bb_error_msg_and_die("bzip2 not supported");
+#endif
 	}
+	else
+		bb_error_msg_and_die("not gzip or bzip2 compressed");
 
 	close(rpm_fd);