7f564c55eb
As both kernel modules are not part of the standard Ubuntu kernel we need to build and load them at runtime. We bundle this together with the container manager start and reuse the classic snap scripts to do the actual build in a proper environment.
63 lines
1.8 KiB
Bash
Executable file
63 lines
1.8 KiB
Bash
Executable file
#!/bin/sh
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set -e
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ROOT=$SNAP_COMMON/classic
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# $1: source
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# $2: target
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# $3: if not empty, bind mount will be read-only
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# note that we do NOT clean these up at the end, as the user might start many
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# classic shells in parallel; we could start all of them in their own mount
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# namespace, but that would make the classic shell less useful for
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# developing/debugging the snappy host
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do_bindmount() {
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if ! mountpoint -q "$ROOT/$2"; then
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if [ -d "$1" -a ! -L "$1" ]; then
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mkdir -p "$ROOT/$2"
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fi
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mount --make-rprivate --rbind -o rbind "$1" "$ROOT/$2"
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if [ -n "${3:-}" ]; then
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mount --rbind -o remount,ro "$1" "$ROOT/$2"
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fi
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fi
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}
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if [ "$(id -u)" != "0" ]; then
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echo "needs to run as root"
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exit 1
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fi
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if [ ! -d $ROOT ]; then
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# IMPORTANT: do not run the classic.create as this will run it with
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# snap-confine again and this will cause havoc with current
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# snap-confine
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$SNAP/bin/create
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fi
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# FIXME: confinement will prevent this
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do_bindmount /home /home
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do_bindmount /run /run
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do_bindmount /proc /proc
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do_bindmount /sys /sys
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do_bindmount /dev /dev
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do_bindmount / /snappy
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SUDO_USER=root
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# fix LP: #1619455
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cp -a /var/lib/extrausers/* $ROOT/var/lib/extrausers/
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cp -a /etc/sudoers.d/* $ROOT/etc/sudoers.d/
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# assemble command line
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DEVPTS="mount -o mode=666,ptmxmode=666 -t devpts devpts /dev/pts"
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SUDOCMD="sudo debian_chroot=classic -u ${SUDO_USER} -i $@"
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# FIXME: workaround for https://bugs.launchpad.net/snappy/+bug/1611493
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SCRIPT="script --quiet --return --command \"$SUDOCMD\" /dev/null"
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CMD="$DEVPTS; $SCRIPT"
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systemd-run --quiet --scope --unit=classic-$$.scope --description="Classic shell" chroot "$ROOT" sh -c "$CMD"
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# kill leftover processes after exiting, if it's still around
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systemctl stop classic-$$.scope 2>/dev/null || true
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