Create entry.sh

Change-type: patch
Signed-off-by: Alan Boris <[email protected]>

Author: alanb128

jetson-xavier-agx/entry.sh

@@ -0,0 +1,87 @@
+#!/bin/bash
+
+# This command only works in privileged container
+tmp_mount='/tmp/_balena'
+mkdir -p "$tmp_mount"
+if mount -t devtmpfs none "$tmp_mount" &> /dev/null; then
+	PRIVILEGED=true
+	umount "$tmp_mount"
+else
+	PRIVILEGED=false
+fi
+rm -rf "$tmp_mount"
+
+function mount_dev()
+{
+	tmp_dir='/tmp/tmpmount'
+	mkdir -p "$tmp_dir"
+	mount -t devtmpfs none "$tmp_dir"
+	mkdir -p "$tmp_dir/shm"
+	mount --move /dev/shm "$tmp_dir/shm"
+	mkdir -p "$tmp_dir/mqueue"
+	mount --move /dev/mqueue "$tmp_dir/mqueue"
+	mkdir -p "$tmp_dir/pts"
+	mount --move /dev/pts "$tmp_dir/pts"
+	touch "$tmp_dir/console"
+	mount --move /dev/console "$tmp_dir/console"
+	umount /dev || true
+	mount --move "$tmp_dir" /dev
+
+	# Since the devpts is mounted with -o newinstance by Docker, we need to make
+	# /dev/ptmx point to its ptmx.
+	# ref: https://www.kernel.org/doc/Documentation/filesystems/devpts.txt
+	ln -sf /dev/pts/ptmx /dev/ptmx
+
+	# When using io.balena.features.sysfs the mount point will already exist
+	# we need to check the mountpoint first.
+	sysfs_dir='/sys/kernel/debug'
+
+	if ! mountpoint -q "$sysfs_dir"; then
+		mount -t debugfs nodev "$sysfs_dir"
+	fi
+
+}
+
+function start_udev()
+{
+	if [ "$UDEV" == "on" ]; then
+		if $PRIVILEGED; then
+			mount_dev
+			if command -v udevd &>/dev/null; then
+				unshare --net udevd --daemon &> /dev/null
+			else
+				unshare --net /lib/systemd/systemd-udevd --daemon &> /dev/null
+			fi
+			udevadm trigger &> /dev/null
+		else
+			echo "Unable to start udev, container must be run in privileged mode to start udev!"
+		fi
+	fi
+}
+
+function init()
+{
+	# echo error message, when executable file is passed but doesn't exist.
+	if [ -n "$1" ]; then
+		if CMD=$(command -v "$1" 2>/dev/null); then
+			shift
+			exec "$CMD" "$@"
+		else
+			echo "Command not found: $1"
+			exit 1
+		fi
+	fi
+}
+
+UDEV=$(echo "$UDEV" | awk '{print tolower($0)}')
+
+case "$UDEV" in
+	'1' | 'true')
+		UDEV='on'
+	;;
+esac
+
+start_udev
+init "$@"
+sleep 8
+startx