1 files changed, 31 insertions, 0 deletions
diff --git a/archival/libunarchive/get_header_tar_gz.c b/archival/libunarchive/get_header_tar_gz.c
new file mode 100644
index 000000000..41c02e16a
--- /dev/null
+++ b/archival/libunarchive/get_header_tar_gz.c
@@ -0,0 +1,31 @@
+/* vi: set sw=4 ts=4: */
+/*
+ * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
+ */
+
+#include <stdlib.h>
+
+#include "libbb.h"
+#include "unarchive.h"
+
+char get_header_tar_gz(archive_handle_t *archive_handle)
+{
+	unsigned char magic[2];
+
+	/* Can't lseek over pipes */
+	archive_handle->seek = seek_by_read;
+
+	xread(archive_handle->src_fd, &magic, 2);
+	if ((magic[0] != 0x1f) || (magic[1] != 0x8b)) {
+		bb_error_msg_and_die("invalid gzip magic");
+	}
+
+	check_header_gzip(archive_handle->src_fd);
+
+	archive_handle->src_fd = open_transformer(archive_handle->src_fd, inflate_gunzip);
+	archive_handle->offset = 0;
+	while (get_header_tar(archive_handle) == EXIT_SUCCESS) /**/;
+
+	/* Can only do one file at a time */
+	return EXIT_FAILURE;
+}