release/src/router/dnsmasq/debian/init

   1 #!/bin/sh
   2 ### BEGIN INIT INFO
   3 # Provides:       dnsmasq
   4 # Required-Start: $network $remote_fs $syslog
   5 # Required-Stop:  $network $remote_fs $syslog
   6 # Default-Start:  2 3 4 5
   7 # Default-Stop:   0 1 6
   8 # Description:    DHCP and DNS server
   9 ### END INIT INFO
  10
  11 set +e   # Don't exit on error status
  12
  13 PATH=/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin
  14 DAEMON=/usr/sbin/dnsmasq
  15 NAME=dnsmasq
  16 DESC="DNS forwarder and DHCP server"
  17
  18 # Most configuration options in /etc/default/dnsmasq are deprecated
  19 # but still honoured.
  20 ENABLED=1
  21 if [ -r /etc/default/$NAME ]; then
  22         . /etc/default/$NAME
  23 fi
  24
  25 # Get the system locale, so that messages are in the correct language, and the
  26 # charset for IDN is correct
  27 if [ -r /etc/default/locale ]; then
  28         . /etc/default/locale
  29         export LANG
  30 fi
  31
  32 # /etc/dnsmasq.d/README is a non-conffile installed by the dnsmasq package.
  33 # Should the dnsmasq package be removed, the following test ensures that
  34 # the daemon is no longer started, even if the dnsmasq-base package is
  35 # still in place.
  36 test -e /etc/dnsmasq.d/README || exit 0
  37
  38 test -x $DAEMON || exit 0
  39
  40 # Provide skeleton LSB log functions for backports which don't have LSB functions.
  41 if [ -f /lib/lsb/init-functions ]; then
  42          . /lib/lsb/init-functions
  43 else
  44          log_warning_msg () {
  45             echo "${@}."
  46          }
  47
  48          log_success_msg () {
  49             echo "${@}."
  50          }
  51
  52          log_daemon_msg () {
  53             echo -n "${1}: $2"
  54          }
  55
  56          log_end_msg () {
  57             if [ $1 -eq 0 ]; then
  58               echo "."
  59             elif [ $1 -eq 255 ]; then
  60               /bin/echo -e " (warning)."
  61             else
  62               /bin/echo -e " failed!"
  63             fi
  64          }
  65 fi
  66
  67 # RESOLV_CONF:
  68 # If the resolvconf package is installed then use the resolv conf file
  69 # that it provides as the default.  Otherwise use /etc/resolv.conf as
  70 # the default.
  71 #
  72 # If IGNORE_RESOLVCONF is set in /etc/default/dnsmasq or an explicit
  73 # filename is set there then this inhibits the use of the resolvconf-provided
  74 # information.
  75 #
  76 # Note that if the resolvconf package is installed it is not possible to
  77 # override it just by configuration in /etc/dnsmasq.conf, it is necessary
  78 # to set IGNORE_RESOLVCONF=yes in /etc/default/dnsmasq.
  79
  80 if [ ! "$RESOLV_CONF" ] &&
  81    [ "$IGNORE_RESOLVCONF" != "yes" ] &&
  82    [ -x /sbin/resolvconf ]
  83 then
  84         RESOLV_CONF=/var/run/dnsmasq/resolv.conf
  85 fi
  86
  87 for INTERFACE in $DNSMASQ_INTERFACE; do
  88         DNSMASQ_INTERFACES="$DNSMASQ_INTERFACES -i $INTERFACE"
  89 done
  90
  91 for INTERFACE in $DNSMASQ_EXCEPT; do
  92         DNSMASQ_INTERFACES="$DNSMASQ_INTERFACES -I $INTERFACE"
  93 done
  94
  95 if [ ! "$DNSMASQ_USER" ]; then
  96    DNSMASQ_USER="dnsmasq"
  97 fi
  98
  99 # This tells dnsmasq to ignore DNS requests that don't come from a local network.
 100 # It's automatically ignored if  --interface --except-interface, --listen-address
 101 # or --auth-server exist in the configuration, so for most installations, it will
 102 # have no effect, but for otherwise-unconfigured installations, it stops dnsmasq
 103 # from being vulnerable to DNS-reflection attacks.
 104
 105 DNSMASQ_OPTS="$DNSMASQ_OPTS --local-service"
 106
 107 start()
 108 {
 109         # Return
 110         #   0 if daemon has been started
 111         #   1 if daemon was already running
 112         #   2 if daemon could not be started
 113
 114         # /var/run may be volatile, so we need to ensure that
 115         # /var/run/dnsmasq exists here as well as in postinst
 116         if [ ! -d /var/run/dnsmasq ]; then
 117            mkdir /var/run/dnsmasq || return 2
 118            chown dnsmasq:nogroup /var/run/dnsmasq || return 2
 119         fi
 120
 121         start-stop-daemon --start --quiet --pidfile /var/run/dnsmasq/$NAME.pid --exec $DAEMON --test > /dev/null || return 1
 122         start-stop-daemon --start --quiet --pidfile /var/run/dnsmasq/$NAME.pid --exec $DAEMON -- \
 123                 -x /var/run/dnsmasq/$NAME.pid \
 124                 ${MAILHOSTNAME:+ -m $MAILHOSTNAME} \
 125                 ${MAILTARGET:+ -t $MAILTARGET} \
 126                 ${DNSMASQ_USER:+ -u $DNSMASQ_USER} \
 127                 ${DNSMASQ_INTERFACES:+ $DNSMASQ_INTERFACES} \
 128                 ${DHCP_LEASE:+ -l $DHCP_LEASE} \
 129                 ${DOMAIN_SUFFIX:+ -s $DOMAIN_SUFFIX} \
 130                 ${RESOLV_CONF:+ -r $RESOLV_CONF} \
 131                 ${CACHESIZE:+ -c $CACHESIZE} \
 132                 ${CONFIG_DIR:+ -7 $CONFIG_DIR} \
 133                 ${DNSMASQ_OPTS:+ $DNSMASQ_OPTS} \
 134                 || return 2
 135 }
 136
 137 start_resolvconf()
 138 {
 139 # If interface "lo" is explicitly disabled in /etc/default/dnsmasq
 140 # Then dnsmasq won't be providing local DNS, so don't add it to
 141 # the resolvconf server set.
 142         for interface in $DNSMASQ_EXCEPT
 143         do
 144                 [ $interface = lo ] && return
 145         done
 146
 147         if [ -x /sbin/resolvconf ] ; then
 148                 echo "nameserver 127.0.0.1" | /sbin/resolvconf -a lo.$NAME
 149         fi
 150         return 0
 151 }
 152
 153 stop()
 154 {
 155         # Return
 156         #   0 if daemon has been stopped
 157         #   1 if daemon was already stopped
 158         #   2 if daemon could not be stopped
 159         #   other if a failure occurred
 160         start-stop-daemon --stop --quiet --retry=TERM/30/KILL/5 --pidfile /var/run/dnsmasq/$NAME.pid --name $NAME
 161         RETVAL="$?"
 162         [ "$RETVAL" = 2 ] && return 2
 163         return "$RETVAL"
 164 }
 165
 166 stop_resolvconf()
 167 {
 168         if [ -x /sbin/resolvconf ] ; then
 169                 /sbin/resolvconf -d lo.$NAME
 170         fi
 171         return 0
 172 }
 173
 174 status()
 175 {
 176         # Return
 177         #   0 if daemon is running
 178         #   1 if daemon is dead and pid file exists
 179         #   3 if daemon is not running
 180         #   4 if daemon status is unknown
 181         start-stop-daemon --start --quiet --pidfile /var/run/dnsmasq/$NAME.pid --exec $DAEMON --test > /dev/null
 182         case "$?" in
 183                 0) [ -e "/var/run/dnsmasq/$NAME.pid" ] && return 1 ; return 3 ;;
 184                 1) return 0 ;;
 185                 *) return 4 ;;
 186         esac
 187 }
 188
 189 case "$1" in
 190   start)
 191         test "$ENABLED" != "0" || exit 0
 192         log_daemon_msg "Starting $DESC" "$NAME"
 193         start
 194         case "$?" in
 195                 0)
 196                         log_end_msg 0
 197                         start_resolvconf
 198                         exit 0
 199                         ;;
 200                 1)
 201                         log_success_msg "(already running)"
 202                         exit 0
 203                         ;;
 204                 *)
 205                         log_end_msg 1
 206                         exit 1
 207                         ;;
 208         esac
 209         ;;
 210   stop)
 211         stop_resolvconf
 212         if [ "$ENABLED" != "0" ]; then
 213              log_daemon_msg "Stopping $DESC" "$NAME"
 214         fi
 215         stop
 216         RETVAL="$?"
 217         if [ "$ENABLED" = "0" ]; then
 218             case "$RETVAL" in
 219                0) log_daemon_msg "Stopping $DESC" "$NAME"; log_end_msg 0 ;;
 220             esac
 221             exit 0
 222         fi
 223         case "$RETVAL" in
 224                 0) log_end_msg 0 ; exit 0 ;;
 225                 1) log_warning_msg "(not running)" ; exit 0 ;;
 226                 *) log_end_msg 1; exit 1 ;;
 227         esac
 228         ;;
 229   restart|force-reload)
 230         test "$ENABLED" != "0" || exit 1
 231         $DAEMON --test ${CONFIG_DIR:+ -7 $CONFIG_DIR} ${DNSMASQ_OPTS:+ $DNSMASQ_OPTS} >/dev/null 2>&1
 232         if [ $? -ne 0 ]; then
 233             NAME="configuration syntax check"
 234             RETVAL="2"
 235         else
 236             stop_resolvconf
 237             stop
 238             RETVAL="$?"
 239         fi
 240         log_daemon_msg "Restarting $DESC" "$NAME"
 241         case "$RETVAL" in
 242                 0|1)
 243                         sleep 2
 244                         start
 245                         case "$?" in
 246                                 0)
 247                                         log_end_msg 0
 248                                         start_resolvconf
 249                                         exit 0
 250                                         ;;
 251                                 *)
 252                                         log_end_msg 1
 253                                         exit 1
 254                                         ;;
 255                         esac
 256                         ;;
 257                 *)
 258                         log_end_msg 1
 259                         exit 1
 260                         ;;
 261         esac
 262         ;;
 263   status)
 264         log_daemon_msg "Checking $DESC" "$NAME"
 265         status
 266         case "$?" in
 267                 0) log_success_msg "(running)" ; exit 0 ;;
 268                 1) log_success_msg "(dead, pid file exists)" ; exit 1 ;;
 269                 3) log_success_msg "(not running)" ; exit 3 ;;
 270                 *) log_success_msg "(unknown)" ; exit 4 ;;
 271         esac
 272         ;;
 273   dump-stats)
 274         kill -s USR1 `cat /var/run/dnsmasq/$NAME.pid`
 275         ;;
 276   systemd-start-resolvconf)
 277         start_resolvconf
 278         ;;
 279   systemd-stop-resolvconf)
 280         stop_resolvconf
 281         ;;
 282   systemd-exec)
 283 #  --pid-file without argument disables writing a PIDfile, we don't need one with sytemd.
 284 # Enable DBus by default because we use DBus activation with systemd.
 285         exec $DAEMON --keep-in-foreground --pid-file --enable-dbus \
 286             ${MAILHOSTNAME:+ -m $MAILHOSTNAME} \
 287             ${MAILTARGET:+ -t $MAILTARGET} \
 288             ${DNSMASQ_USER:+ -u $DNSMASQ_USER} \
 289             ${DNSMASQ_INTERFACES:+ $DNSMASQ_INTERFACES} \
 290             ${DHCP_LEASE:+ -l $DHCP_LEASE} \
 291             ${DOMAIN_SUFFIX:+ -s $DOMAIN_SUFFIX} \
 292             ${RESOLV_CONF:+ -r $RESOLV_CONF} \
 293             ${CACHESIZE:+ -c $CACHESIZE} \
 294             ${CONFIG_DIR:+ -7 $CONFIG_DIR} \
 295             ${DNSMASQ_OPTS:+ $DNSMASQ_OPTS}
 296         ;;
 297   *)
 298         echo "Usage: /etc/init.d/$NAME {start|stop|restart|force-reload|dump-stats|status}" >&2
 299         exit 3
 300         ;;
 301 esac
 302
 303 exit 0
 304