got all of the I/O hooked up (I think)
diff --git a/bbb_cape/src/bbb/uart_reader.cc b/bbb_cape/src/bbb/uart_reader.cc
index c45c8ea..9379252 100644
--- a/bbb_cape/src/bbb/uart_reader.cc
+++ b/bbb_cape/src/bbb/uart_reader.cc
@@ -32,7 +32,7 @@
     LOG(INFO, "unexporting BB-UART1\n");
     if (system("bash -c 'echo -$(cat /sys/devices/bone_capemgr.*/slots"
                " | fgrep BB-UART1"
-               " | cut -c 2) > /sys/devices/bone_capemgr.*/slots'") ==
+               " | cut -d : -f 1) > /sys/devices/bone_capemgr.*/slots'") ==
         -1) {
       LOG(FATAL, "system([disable OMAP UART]) failed with %d: %s\n", errno,
           strerror(errno));