Debian scripts for starting/stopping a ramdisk

customize

#!/bin/sh

RAMDISK_SIZE="256m"
MOUNT_POINT="/mnt/ramdisk"
USER=root
GROUP=root
PERMISSIONS=775
PRE_STOP_SCRIPT="/usr/local/bin/stop_ramdisk.sh"

ramdisk

#!/bin/sh
# kFreeBSD do not accept scripts as interpreters, using #!/bin/sh and sourcing.
if [ true != "$INIT_D_SCRIPT_SOURCED" ] ; then
    set "$0" "$@"; INIT_D_SCRIPT_SOURCED=true . /lib/init/init-d-script
fi
### BEGIN INIT INFO
# Provides:          ramdisk
# Required-Start:    $local_fs $syslog
# Required-Stop:     $local_fs $syslog
# Default-Start:     2 3 4 5
# Default-Stop:      0 1 6
# Short-Description: Creates a filesystem and mounts a RAMDISK
# Description:       Creates a filesystem and mounts a RAMDISK.
### END INIT INFO

# Author: Chad Phillips <chad@apartmentlines.com>

RAMDISK_SIZE="64m"
MOUNT_POINT=""
OWNER=root
GROUP=root
PERMISSIONS=755
PRE_STOP_SCRIPT=""

RETVAL=0

if [ -f /etc/default/ramdisk ]; then
  . /etc/default/ramdisk
fi

start() {
  # Exit if already mounted.
  check_status
  if [ "$?" = "0" ]; then
    echo "tmpfs is already mounted on $MOUNT_POINT"
    exit 0
  fi

  if [ -n "$MOUNT_POINT" ] && [ -d $MOUNT_POINT ]; then
    log_daemon_msg "Mounting tmpfs on $MOUNT_POINT" "ramdisk\n"
    mount -t tmpfs -osize=${RAMDISK_SIZE} tmpfs $MOUNT_POINT
    RETVAL=$?
    if [ "$RETVAL" = "0" ]; then
      log_daemon_msg "Setting owner $OWNER, group $GROUP, permissions $PERMISSIONS" "ramdisk\n"
      chown ${OWNER}:${GROUP} $MOUNT_POINT && chmod $PERMISSIONS $MOUNT_POINT
      RETVAL=$?
      if [ "$RETVAL" != "0" ]; then
        log_failure_msg "Could not set ownership/permissions on $MOUNT_POINT\n"
        exit 1
      fi
    else
      log_failure_msg "Could not mount $MOUNT_POINT\n"
      exit 1
    fi
  else
    log_failure_msg "$MOUNT_POINT is not a valid directory\n"
    exit 1
  fi
  return $RETVAL
}


stop() {

  # Exit if already unmounted.
  check_status
  if [ "$?" = "7" ]; then
    echo "tmpfs is already unmounted from $MOUNT_POINT"
    exit 0
  fi

  if [ -n "$PRE_STOP_SCRIPT" ] && [ -x $PRE_STOP_SCRIPT ]; then
    log_daemon_msg "Running pre-stop script ${PRE_STOP_SCRIPT} for tmpfs on ${MOUNT_POINT}" "ramdisk\n"
    $PRE_STOP_SCRIPT
  fi

  # Unmount ramdisk.
  log_daemon_msg "Unmounting tmpfs on ${MOUNT_POINT}" "ramdisk\n"
  umount $MOUNT_POINT
  if [ "$RETVAL" != "0" ]; then
    log_failure_msg "Could not unmount $MOUNT_POINT\n"
  fi
  RETVAL=$?
  return $RETVAL
}

status() {
  check_status
  if [ "$?" = "0" ]; then
    echo "tmpfs mounted at $MOUNT_POINT"
  else
    echo "tmpfs not mounted at $MOUNT_POINT"
  fi
  return 0
}

check_status() {
  if [ "`mount | grep tmpfs | grep $MOUNT_POINT`" = "" ]; then
    return 7
  else
    return 0
  fi
}

# See how we were called.
case "$1" in
  start)
        start
        ;;
  stop)
        stop
        ;;
  restart)
        stop;
        start;
        ;;
  status)
        status
        ;;
  *)
        echo "Usage: ramdisk {start|stop|restart|status}"
        exit 1
esac

exit $?

ramdisk.service

[Unit]
Description=ramdisk
After=syslog.target local-fs.target remote-fs.target

[Service]
Type=oneshot
ExecStart=/etc/init.d/ramdisk start
ExecStop=/etc/init.d/ramdisk stop
RemainAfterExit=yes

[Install]
WantedBy=multi-user.target

; vi: ft=dosini