1 files changed, 16 insertions, 0 deletions

diff --git a/archival/libarchive/seek_by_read.c b/archival/libarchive/seek_by_read.c
new file mode 100644
index 000000000..ad931a8de
--- /dev/null
+++ b/archival/libarchive/seek_by_read.c
@@ -0,0 +1,16 @@
+/* vi: set sw=4 ts=4: */
+/*
+ * Licensed under GPLv2 or later, see file LICENSE in this source tree.
+ */
+
+#include "libbb.h"
+#include "archive.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(int fd, off_t amount)
+{
+        if (amount)
+                bb_copyfd_exact_size(fd, -1, amount);
+}