poky/scripts/poky-chroot-run

#!/bin/bash

Runs a command within a Poky chroot

XEPHYR=which Xephyr if [ ! -n "$XEPHYR" -o ! -x "$XEPHYR" ]; then echo "You need to install Xephyr to use $0" exit 1 fi

CHROOTUID=which chrootuid if [ ! -n "$CHROOTUID" -o ! -x "$CHROOTUID" ]; then echo "You need to install Xephyr to use $0" exit 1 fi

case $# in 0) echo "Invalid arguments." echo "$ $0 [command]" exit 1 ;; 1) ROOTFS=$1 shift # Set $1 to be the boot script set -- /usr/bin/poky-chroot-launch ;; *) ROOTFS=$1 shift # Now $1 onwards are the command and arguments to run ;; esac

test -f "$ROOTFS/.pokychroot" || { echo "$ROOTFS is not setup for use as a Poky chroot." ; exit 1 ;}

set -e

chrootuid doesn't handle relative paths, so ensure that the rootfs path is

absolute

if test ${ROOTFS:0:1} != /; then ROOTFS="$(pwd)/$ROOTFS" fi

safe_mount() { if ! mountpoint -q "$ROOTFS/$1"; then sudo mount --bind $1 "$ROOTFS/$1" fi } safe_umount() { if mountpoint -q "$ROOTFS/$1"; then sudo umount "$ROOTFS/$1" fi }

Mount the directories we need

for m in /dev /dev/pts /dev/shm /proc /sys /tmp; do safe_mount $m done

Set up the environment

export PATH=/bin:/usr/bin:/sbin:/usr/sbin export HOME=/home/$USER

if [ ! -f "$ROOTFS/.pokychroot.init" ]; then sudo $CHROOTUID -i "$ROOTFS" $USER /bin/sh -c "/usr/bin/poky-chroot-init" touch "$ROOTFS/.pokychroot.init" fi

$XEPHYR :1 -ac -screen 640x480x16 &

Go go go!

sudo $CHROOTUID -i "$ROOTFS" $USER "$@" || /bin/true

Trap term signals so we don't kill ourselves

trap true TERM

send term signal to the process group

kill -- -

Unmount TODO: only umount if there are no other sessions active, somehow.

for m in /tmp /sys /proc /dev/shm /dev/pts /dev; do safe_umount $m done