Merge pull request #663 from endocode/iaguis/debug-stage1

scripts: debug: add script to install busybox in stage1

scripts/debug/stage1_install_busybox.sh

@@ -0,0 +1,56 @@
+#!/bin/bash
+
+function usage_and_exit {
+    echo "Usage: stage1_install_busybox.sh UUID"
+    exit 1
+}
+
+ARGC=$#
+
+if [ ${ARGC} -lt 1 ]; then
+    usage_and_exit
+fi
+
+while test $# -gt 0
+do
+    case "${1}" in
+        --*)
+            usage_and_exit
+            ;;
+        *) UUID="${1}"
+            ;;
+    esac
+    shift
+done
+
+BUSYBOX=${BUSYBOX_BINARY:-$(which busybox 2> /dev/null)}
+
+if [ ! -x "${BUSYBOX}" ]; then
+    echo "error: busybox binary is not executable: Install it or set BUSYBOX_BINARY env variable"
+    exit 1
+fi
+
+IS_STATIC=$(file ${BUSYBOX} | grep static)
+
+if [ -z "${IS_STATIC}" ]; then
+    echo "error: busybox binary is not statically linked"
+    exit 1
+fi
+
+RKT_RUN_DIR="/var/lib/rkt/containers/run"
+CONTAINER_DIR="${RKT_RUN_DIR}/${UUID}"
+
+BUSYBOX_LINKS="ls cp cat mount vi awk chmod chown mv df ps rm tar top tr wc which ping"
+
+NSPAWN_PID=$(ps aux | grep "[u]uid=$UUID" | awk '{print $2}')
+
+sudo nsenter -m -t "${NSPAWN_PID}" cp ${BUSYBOX} ${CONTAINER_DIR}/stage1/rootfs/bin
+sudo nsenter -m -t "${NSPAWN_PID}" chmod +x "${CONTAINER_DIR}/stage1/rootfs/bin/busybox"
+
+for link in ${BUSYBOX_LINKS}; do
+    sudo nsenter -m -t "${NSPAWN_PID}" ln -sf busybox "${CONTAINER_DIR}/stage1/rootfs/bin/${link}"
+done
+
+echo "Busybox installed. Use the following command to enter the repository:"
+SYSTEMD_PID=$(sudo cat "${RKT_RUN_DIR}/${UUID}/pid")
+echo sudo nsenter -m -u -i -p -t ${SYSTEMD_PID}