Be certain to not abort prematurely when reading stuff from pipes.
diff --git a/archival/libunarchive/archive_xread.c b/archival/libunarchive/archive_xread.c
index 0b29dbf..d63d0d5 100644
--- a/archival/libunarchive/archive_xread.c
+++ b/archival/libunarchive/archive_xread.c
@@ -25,7 +25,7 @@
 	ssize_t size;
 
 	size = archive_handle->read(archive_handle->src_fd, buf, count);
-	if (size == -1) {
+	if (size < 0) {
 		bb_perror_msg_and_die("Read error");
 	}
 
diff --git a/archival/libunarchive/init_handle.c b/archival/libunarchive/init_handle.c
index 4b01034..2659aa3 100644
--- a/archival/libunarchive/init_handle.c
+++ b/archival/libunarchive/init_handle.c
@@ -30,7 +30,7 @@
 	archive_handle->action_header = header_skip;
 	archive_handle->action_data = data_skip;
 	archive_handle->filter = filter_accept_all;
-	archive_handle->read = read;
+	archive_handle->read = bb_full_read;
 	archive_handle->seek = seek_by_jump;
 
 	return(archive_handle);