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 test -x $DAEMON || exit 0
  33
  34 # Provide skeleton LSB log functions for backports which don't have LSB functions.
  35 if [ -f /lib/lsb/init-functions ]; then
  36          . /lib/lsb/init-functions
  37 else
  38          log_warning_msg () {
  39             echo "${@}."
  40          }
  41
  42          log_success_msg () {
  43             echo "${@}."
  44          }
  45
  46          log_daemon_msg () {
  47             echo -n "${1}: $2"
  48          }
  49
  50          log_end_msg () {
  51             if [ $1 -eq 0 ]; then
  52               echo "."
  53             elif [ $1 -eq 255 ]; then
  54               /bin/echo -e " (warning)."
  55             else
  56               /bin/echo -e " failed!"
  57             fi
  58          }
  59 fi
  60
  61 # RESOLV_CONF:
  62 # If the resolvconf package is installed then use the resolv conf file
  63 # that it provides as the default.  Otherwise use /etc/resolv.conf as
  64 # the default.
  65 #
  66 # If IGNORE_RESOLVCONF is set in /etc/default/dnsmasq or an explicit
  67 # filename is set there then this inhibits the use of the resolvconf-provided
  68 # information.
  69 #
  70 # Note that if the resolvconf package is installed it is not possible to
  71 # override it just by configuration in /etc/dnsmasq.conf, it is necessary
  72 # to set IGNORE_RESOLVCONF=yes in /etc/default/dnsmasq.
  73
  74 if [ ! "$RESOLV_CONF" ] &&
  75    [ "$IGNORE_RESOLVCONF" != "yes" ] &&
  76    [ -x /sbin/resolvconf ]
  77 then
  78         RESOLV_CONF=/var/run/dnsmasq/resolv.conf
  79 fi
  80
  81 for INTERFACE in $DNSMASQ_INTERFACE; do
  82         DNSMASQ_INTERFACES="$DNSMASQ_INTERFACES -i $INTERFACE"
  83 done
  84
  85 for INTERFACE in $DNSMASQ_EXCEPT; do
  86         DNSMASQ_INTERFACES="$DNSMASQ_INTERFACES -I $INTERFACE"
  87 done
  88
  89 if [ ! "$DNSMASQ_USER" ]; then
  90    DNSMASQ_USER="dnsmasq"
  91 fi
  92
  93 start()
  94 {
  95         # Return
  96         #   0 if daemon has been started
  97         #   1 if daemon was already running
  98         #   2 if daemon could not be started
  99
 100         # /var/run may be volatile, so we need to ensure that
 101         # /var/run/dnsmasq exists here as well as in postinst
 102         if [ ! -d /var/run/dnsmasq ]; then
 103            mkdir /var/run/dnsmasq || return 2
 104            chown dnsmasq:nogroup /var/run/dnsmasq || return 2
 105         fi
 106
 107         start-stop-daemon --start --quiet --pidfile /var/run/dnsmasq/$NAME.pid --exec $DAEMON --test > /dev/null || return 1
 108         start-stop-daemon --start --quiet --pidfile /var/run/dnsmasq/$NAME.pid --exec $DAEMON -- \
 109                 -x /var/run/dnsmasq/$NAME.pid \
 110                 ${MAILHOSTNAME:+ -m $MAILHOSTNAME} \
 111                 ${MAILTARGET:+ -t $MAILTARGET} \
 112                 ${DNSMASQ_USER:+ -u $DNSMASQ_USER} \
 113                 ${DNSMASQ_INTERFACES:+ $DNSMASQ_INTERFACES} \
 114                 ${DHCP_LEASE:+ -l $DHCP_LEASE} \
 115                 ${DOMAIN_SUFFIX:+ -s $DOMAIN_SUFFIX} \
 116                 ${RESOLV_CONF:+ -r $RESOLV_CONF} \
 117                 ${CACHESIZE:+ -c $CACHESIZE} \
 118                 ${CONFIG_DIR:+ -7 $CONFIG_DIR} \
 119                 ${DNSMASQ_OPTS:+ $DNSMASQ_OPTS} \
 120                 || return 2
 121 }
 122
 123 start_resolvconf()
 124 {
 125 # If interface "lo" is explicitly disabled in /etc/default/dnsmasq
 126 # Then dnsmasq won't be providing local DNS, so don't add it to
 127 # the resolvconf server set.
 128         for interface in $DNSMASQ_EXCEPT
 129         do
 130                 [ $interface = lo ] && return
 131         done
 132
 133         if [ -x /sbin/resolvconf ] ; then
 134                 echo "nameserver 127.0.0.1" | /sbin/resolvconf -a lo.$NAME
 135         fi
 136         return 0
 137 }
 138
 139 stop()
 140 {
 141         # Return
 142         #   0 if daemon has been stopped
 143         #   1 if daemon was already stopped
 144         #   2 if daemon could not be stopped
 145         #   other if a failure occurred
 146         start-stop-daemon --stop --quiet --retry=TERM/30/KILL/5 --pidfile /var/run/dnsmasq/$NAME.pid --name $NAME
 147         RETVAL="$?"
 148         [ "$RETVAL" = 2 ] && return 2
 149         return "$RETVAL"
 150 }
 151
 152 stop_resolvconf()
 153 {
 154         if [ -x /sbin/resolvconf ] ; then
 155                 /sbin/resolvconf -d lo.$NAME
 156         fi
 157         return 0
 158 }
 159
 160 status()
 161 {
 162         # Return
 163         #   0 if daemon is running
 164         #   1 if daemon is dead and pid file exists
 165         #   3 if daemon is not running
 166         #   4 if daemon status is unknown
 167         start-stop-daemon --start --quiet --pidfile /var/run/dnsmasq/$NAME.pid --exec $DAEMON --test > /dev/null
 168         case "$?" in
 169                 0) [ -e "/var/run/dnsmasq/$NAME.pid" ] && return 1 ; return 3 ;;
 170                 1) return 0 ;;
 171                 *) return 4 ;;
 172         esac
 173 }
 174
 175 case "$1" in
 176   start)
 177         test "$ENABLED" != "0" || exit 0
 178         log_daemon_msg "Starting $DESC" "$NAME"
 179         start
 180         case "$?" in
 181                 0)
 182                         log_end_msg 0
 183                         start_resolvconf
 184                         exit 0
 185                         ;;
 186                 1)
 187                         log_success_msg "(already running)"
 188                         exit 0
 189                         ;;
 190                 *)
 191                         log_end_msg 1
 192                         exit 1
 193                         ;;
 194         esac
 195         ;;
 196   stop)
 197         stop_resolvconf
 198         if [ "$ENABLED" != "0" ]; then
 199              log_daemon_msg "Stopping $DESC" "$NAME"
 200         fi
 201         stop
 202         RETVAL="$?"
 203         if [ "$ENABLED" = "0" ]; then
 204             case "$RETVAL" in
 205                0) log_daemon_msg "Stopping $DESC" "$NAME"; log_end_msg 0 ;;
 206             esac
 207             exit 0
 208         fi
 209         case "$RETVAL" in
 210                 0) log_end_msg 0 ; exit 0 ;;
 211                 1) log_warning_msg "(not running)" ; exit 0 ;;
 212                 *) log_end_msg 1; exit 1 ;;
 213         esac
 214         ;;
 215   restart|force-reload)
 216         test "$ENABLED" != "0" || exit 1
 217         $DAEMON --test ${CONFIG_DIR:+ -7 $CONFIG_DIR} ${DNSMASQ_OPTS:+ $DNSMASQ_OPTS} >/dev/null 2>&1
 218         if [ $? -ne 0 ]; then
 219             NAME="configuration syntax check"
 220             RETVAL="2"
 221         else
 222             stop_resolvconf
 223             stop
 224             RETVAL="$?"
 225         fi
 226         log_daemon_msg "Restarting $DESC" "$NAME"
 227         case "$RETVAL" in
 228                 0|1)
 229                         sleep 2
 230                         start
 231                         case "$?" in
 232                                 0)
 233                                         log_end_msg 0
 234                                         start_resolvconf
 235                                         exit 0
 236                                         ;;
 237                                 *)
 238                                         log_end_msg 1
 239                                         exit 1
 240                                         ;;
 241                         esac
 242                         ;;
 243                 *)
 244                         log_end_msg 1
 245                         exit 1
 246                         ;;
 247         esac
 248         ;;
 249   status)
 250         log_daemon_msg "Checking $DESC" "$NAME"
 251         status
 252         case "$?" in
 253                 0) log_success_msg "(running)" ; exit 0 ;;
 254                 1) log_success_msg "(dead, pid file exists)" ; exit 1 ;;
 255                 3) log_success_msg "(not running)" ; exit 3 ;;
 256                 *) log_success_msg "(unknown)" ; exit 4 ;;
 257         esac
 258         ;;
 259   dump-stats)
 260         kill -s USR1 `cat /var/run/dnsmasq/$NAME.pid`
 261         ;;
 262   systemd-start-resolvconf)
 263         start_resolvconf
 264         ;;
 265   systemd-stop-resolvconf)
 266         stop_resolvconf
 267         ;;
 268   systemd-exec)
 269 #  --pid-file without argument disables writing a PIDfile, we don't need one with sytemd.
 270 # Enable DBus by default because we use DBus activation with systemd.
 271         exec $DAEMON --keep-in-foreground --pid-file --enable-dbus \
 272             ${MAILHOSTNAME:+ -m $MAILHOSTNAME} \
 273             ${MAILTARGET:+ -t $MAILTARGET} \
 274             ${DNSMASQ_USER:+ -u $DNSMASQ_USER} \
 275             ${DNSMASQ_INTERFACES:+ $DNSMASQ_INTERFACES} \
 276             ${DHCP_LEASE:+ -l $DHCP_LEASE} \
 277             ${DOMAIN_SUFFIX:+ -s $DOMAIN_SUFFIX} \
 278             ${RESOLV_CONF:+ -r $RESOLV_CONF} \
 279             ${CACHESIZE:+ -c $CACHESIZE} \
 280             ${CONFIG_DIR:+ -7 $CONFIG_DIR} \
 281             ${DNSMASQ_OPTS:+ $DNSMASQ_OPTS}
 282         ;;
 283   *)
 284         echo "Usage: /etc/init.d/$NAME {start|stop|restart|force-reload|dump-stats|status}" >&2
 285         exit 3
 286         ;;
 287 esac
 288
 289 exit 0
 290