1 files changed, 16 insertions, 0 deletions
diff --git a/release/src/router/busybox/archival/libunarchive/seek_by_read.c b/release/src/router/busybox/archival/libunarchive/seek_by_read.c
new file mode 100644
index 00000000..2326a751
--- /dev/null
+++ b/release/src/router/busybox/archival/libunarchive/seek_by_read.c
@@ -0,0 +1,16 @@
+/* vi: set sw=4 ts=4: */
+/*
+ * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
+ */
+
+#include "libbb.h"
+#include "unarchive.h"
+
+/*  If we are reading through a pipe, or from stdin then we can't lseek,
+ *  we must read and discard the data to skip over it.
+ */
+void FAST_FUNC seek_by_read(const archive_handle_t *archive_handle, unsigned jump_size)
+{
+	if (jump_size)
+		bb_copyfd_exact_size(archive_handle->src_fd, -1, jump_size);
+}