feat: rm unused dind files

containers/dind/wrapdocker

-#!/bin/bash
-
-# Ensure that all nodes in /dev/mapper correspond to mapped devices currently loaded by the device-mapper kernel driver
-dmsetup mknodes
-
-# First, make sure that cgroups are mounted correctly.
-CGROUP=/sys/fs/cgroup
-: {LOG:=stdio}
-
-[ -d $CGROUP ] ||
-	mkdir $CGROUP
-
-mountpoint -q $CGROUP ||
-	mount -n -t tmpfs -o uid=0,gid=0,mode=0755 cgroup $CGROUP || {
-		echo "Could not make a tmpfs mount. Did you use --privileged?"
-		exit 1
-	}
-
-if [ -d /sys/kernel/security ] && ! mountpoint -q /sys/kernel/security
-then
-    mount -t securityfs none /sys/kernel/security || {
-        echo "Could not mount /sys/kernel/security."
-        echo "AppArmor detection and --privileged mode might break."
-    }
-fi
-
-# Mount the cgroup hierarchies exactly as they are in the parent system.
-for SUBSYS in $(cut -d: -f2 /proc/1/cgroup)
-do
-        [ -d $CGROUP/$SUBSYS ] || mkdir $CGROUP/$SUBSYS
-        mountpoint -q $CGROUP/$SUBSYS ||
-                mount -n -t cgroup -o $SUBSYS cgroup $CGROUP/$SUBSYS
-
-        # The two following sections address a bug which manifests itself
-        # by a cryptic "lxc-start: no ns_cgroup option specified" when
-        # trying to start containers withina container.
-        # The bug seems to appear when the cgroup hierarchies are not
-        # mounted on the exact same directories in the host, and in the
-        # container.
-
-        # Named, control-less cgroups are mounted with "-o name=foo"
-        # (and appear as such under /proc/<pid>/cgroup) but are usually
-        # mounted on a directory named "foo" (without the "name=" prefix).
-        # Systemd and OpenRC (and possibly others) both create such a
-        # cgroup. To avoid the aforementioned bug, we symlink "foo" to
-        # "name=foo". This shouldn't have any adverse effect.
-        echo $SUBSYS | grep -q ^name= && {
-                NAME=$(echo $SUBSYS | sed s/^name=//)
-                ln -s $SUBSYS $CGROUP/$NAME
-        }
-
-        # Likewise, on at least one system, it has been reported that
-        # systemd would mount the CPU and CPU accounting controllers
-        # (respectively "cpu" and "cpuacct") with "-o cpuacct,cpu"
-        # but on a directory called "cpu,cpuacct" (note the inversion
-        # in the order of the groups). This tries to work around it.
-        [ $SUBSYS = cpuacct,cpu ] && ln -s $SUBSYS $CGROUP/cpu,cpuacct
-done
-
-# Note: as I write those lines, the LXC userland tools cannot setup
-# a "sub-container" properly if the "devices" cgroup is not in its
-# own hierarchy. Let's detect this and issue a warning.
-grep -q :devices: /proc/1/cgroup ||
-	echo "WARNING: the 'devices' cgroup should be in its own hierarchy."
-grep -qw devices /proc/1/cgroup ||
-	echo "WARNING: it looks like the 'devices' cgroup is not mounted."
-
-# Now, close extraneous file descriptors.
-pushd /proc/self/fd >/dev/null
-for FD in *
-do
-	case "$FD" in
-	# Keep stdin/stdout/stderr
-	[012])
-		;;
-	# Nuke everything else
-	*)
-		eval exec "$FD>&-"
-		;;
-	esac
-done
-popd >/dev/null
-
-
-# If a pidfile is still around (for example after a container restart),
-# delete it so that docker can start.
-rm -rf /var/run/docker.pid
-
-# If we were given a PORT environment variable, start as a simple daemon;
-# otherwise, spawn a shell as well
-if [ "$PORT" ]
-then
-	exec dockerd -H 0.0.0.0:$PORT -H unix:///var/run/docker.sock \
-		$DOCKER_DAEMON_ARGS
-else
-	if [ "$LOG" == "file" ]
-	then
-		dockerd $DOCKER_DAEMON_ARGS &>/var/log/docker.log &
-	else
-		dockerd $DOCKER_DAEMON_ARGS &
-	fi
-	(( timeout = 60 + SECONDS ))
-	until docker info >/dev/null 2>&1
-	do
-		if (( SECONDS >= timeout )); then
-			echo 'Timed out trying to connect to internal docker host.' >&2
-			break
-		fi
-		sleep 1
-	done
-	[[ $1 ]] && exec "$@"
-	exec bash --login
-fi