summaryrefslogtreecommitdiff
diff options
context:
space:
mode:
authorDenys Vlasenko <vda.linux@googlemail.com>2009-11-06 03:04:19 (GMT)
committer Denys Vlasenko <vda.linux@googlemail.com>2009-11-06 03:04:19 (GMT)
commit6cf7f01256c39677a0a5561ebca60e8def9d6d7e (patch)
tree9751616a6653806d6703da369616d74e38f8b785
parent85bb843f47342b19c4f0814331c1f4c78b0011ad (diff)
downloadbusybox-6cf7f01256c39677a0a5561ebca60e8def9d6d7e.tar.gz
busybox-6cf7f01256c39677a0a5561ebca60e8def9d6d7e.tar.bz2
adding example runit-style service directory
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
-rwxr-xr-xexamples/var_service/dhcp_if/convert2ipconf53
-rwxr-xr-xexamples/var_service/dhcp_if/dhcp_handler82
-rwxr-xr-xexamples/var_service/dhcp_if/log/run21
-rwxr-xr-xexamples/var_service/dhcp_if/p_log4
-rwxr-xr-xexamples/var_service/dhcp_if/run23
-rwxr-xr-xexamples/var_service/dhcp_if/w_log4
-rwxr-xr-xexamples/var_service/dhcp_if_pinger/run23
-rw-r--r--examples/var_service/fw/conf/11.22.33.44.ipconf--10
-rw-r--r--examples/var_service/fw/conf/192.168.0.1.ipconf11
-rw-r--r--examples/var_service/fw/conf/lo.ipconf10
-rw-r--r--examples/var_service/fw/etc/hosts21
-rw-r--r--examples/var_service/fw/etc/resolv.conf31
-rwxr-xr-xexamples/var_service/fw/run211
-rwxr-xr-xexamples/var_service/fw/stat12
-rwxr-xr-xexamples/var_service/ifplugd_if/ifplugd_handler15
-rwxr-xr-xexamples/var_service/ifplugd_if/log/run21
-rwxr-xr-xexamples/var_service/ifplugd_if/p_log4
-rwxr-xr-xexamples/var_service/ifplugd_if/run32
-rwxr-xr-xexamples/var_service/ifplugd_if/w_log4
-rwxr-xr-xexamples/var_service/nmeter/run21
20 files changed, 613 insertions, 0 deletions
diff --git a/examples/var_service/dhcp_if/convert2ipconf b/examples/var_service/dhcp_if/convert2ipconf
new file mode 100755
index 0000000..cee0854
--- /dev/null
+++ b/examples/var_service/dhcp_if/convert2ipconf
@@ -0,0 +1,53 @@
+#!/bin/sh
+# convert:
+
+# dhcptype=5
+# serverid=172.16.42.102
+# lease=97200
+# interface=eth0
+# ip=172.16.42.177
+# subnet=255.255.255.0
+# mask=24
+# broadcast=172.16.22.255
+# router=172.16.42.98
+# dns=10.34.32.125 10.32.63.5 10.34.255.7 10.11.255.27
+# domain=lab.example.com example.com
+# ntpsrv=10.34.32.125 10.34.255.7
+
+# into:
+
+#let cfg=cfg+1
+#if[$cfg]=...; ip[$cfg]=...; ipmask[$cfg]=.../...; gw[$cfg]=...; net[$cfg]=... dns[$cfg]=...
+
+exec >"$0.out" 2>&1
+
+test "$interface" || exit 1
+test -f "$1" || exit 1
+
+# Unsafe, and does not handle values with spaces:
+#. "./$1" || exit 1
+# Safe(r) parsing:
+sq="'"
+while read line; do
+ #echo "line: $line"
+ # Skip empty lines and lines with single quotes
+ test "${line##*$sq*}" || continue
+ var="${line%%=*}"
+ val="${line#*=}"
+ #echo "var:$var val:'$val'"
+ eval "$var='$val'"
+done <"$1"
+
+{
+echo "let cfg=cfg+1"
+test "$interface" && echo "if[\$cfg]='$interface'"
+test "$ip" && echo "ip[\$cfg]='$ip'"
+test "$ip" && test "$mask" \
+ && echo "ipmask[\$cfg]='$ip/$mask'"
+test "$router" && echo "gw[\$cfg]='$router'"
+test "$dns" && echo "dns[\$cfg]='$dns'"
+# TODO: I never saw a dhcp server which correctly announces
+# which subnet(s) is/are available thru advertised router
+# Assume 0/0
+echo "net[\$cfg]='0/0'"
+} >"$2"
diff --git a/examples/var_service/dhcp_if/dhcp_handler b/examples/var_service/dhcp_if/dhcp_handler
new file mode 100755
index 0000000..9ed3e7a
--- /dev/null
+++ b/examples/var_service/dhcp_if/dhcp_handler
@@ -0,0 +1,82 @@
+#!/bin/sh
+# executed by udhcpc
+# parameters: $1 and environment
+#
+# $1 is:
+#
+# deconfig: This argument is used when udhcpc starts, and
+# when a lease is lost. The script should put the interface in an
+# up, but deconfigured state, ie: ifconfig $interface 0.0.0.0.
+# Environment: interface=ethN
+#
+# bound: This argument is used when udhcpc moves from an
+# unbound, to a bound state. All of the paramaters are set in
+# enviromental variables, The script should configure the interface,
+# and set any other relavent parameters (default gateway, dns server, etc).
+# Environment:
+# dhcptype=5
+# serverid=172.16.42.102
+# lease=97200
+# interface=eth0
+# ip=172.16.42.177
+# subnet=255.255.255.0
+# mask=24
+# broadcast=172.16.22.255
+# router=172.16.42.98
+# dns=10.34.32.125 10.32.63.5 10.34.255.7 10.11.255.27
+# domain=lab.example.com example.com
+# ntpsrv=10.34.32.125 10.34.255.7
+#
+# renew: This argument is used when a DHCP lease is renewed. All of
+# the paramaters are set in enviromental variables. This argument is
+# used when the interface is already configured, so the IP address,
+# will not change, however, the other DHCP paramaters, such as the
+# default gateway, subnet mask, and dns server may change.
+# Environment: same as for "bound".
+#
+# nak: This argument is used with udhcpc receives a NAK message.
+# The script with the deconfig argument will be called directly
+# afterwards, so no changes to the network interface are neccessary.
+# This hook is provided for purely informational purposes (the
+# message option may contain a reason for the NAK).
+# Environment: interface=ethN, serverid=IP_ADDR
+#
+# leasefail: called when lease cannot be obtained
+# (for example, when DHCP server is down).
+# Environment: interface=ethN
+
+# TODO: put domain into /etc/resolv.conf (thru /var/service/fw)
+# TODO: feed ntp IPs to /var/service/ntp
+
+service=`basename $PWD`
+outfile="$service.ipconf"
+dir="/var/run/service/fw"
+
+exec >>"$0.out" 2>&1
+
+echo "`date`: Params: $*"
+
+if test x"$1" != x"bound" && test x"$1" != x"renew" ; then
+ # Reconfigure network with this interface disabled
+ echo "Deconfiguring"
+ rm "$service.out"
+ rm "$outfile"
+ rm "$dir/$outfile"
+ sv u /var/service/fw
+ exit
+fi
+
+# Bound: we've got the lease
+
+# Process params
+env >"$service.out"
+./convert2ipconf "$service.out" "$outfile"
+
+# Reconfigure routing and firewall if needed
+diff --brief "$outfile" "$dir/$outfile" >/dev/null 2>&1
+if test "$?" != "0"; then
+ echo "Reconfiguring"
+ mkdir -p "$dir" 2>/dev/null
+ cp "$outfile" "$dir/$outfile"
+ sv u /var/service/fw
+fi
diff --git a/examples/var_service/dhcp_if/log/run b/examples/var_service/dhcp_if/log/run
new file mode 100755
index 0000000..560d1b1
--- /dev/null
+++ b/examples/var_service/dhcp_if/log/run
@@ -0,0 +1,21 @@
+#!/bin/sh
+
+user=logger
+
+logdir="/var/log/service/`(cd ..;basename $PWD)`"
+mkdir -p "$logdir" 2>/dev/null
+chown -R "$user": "$logdir"
+chmod -R go-rwxst,u+rwX "$logdir"
+rm logdir
+ln -s "$logdir" logdir
+
+# make this dir accessible to logger
+chmod a+rX .
+
+exec >/dev/null
+exec 2>&1
+exec \
+env - PATH="$PATH" \
+softlimit \
+setuidgid "$user" \
+svlogd -tt "$logdir"
diff --git a/examples/var_service/dhcp_if/p_log b/examples/var_service/dhcp_if/p_log
new file mode 100755
index 0000000..a2521be
--- /dev/null
+++ b/examples/var_service/dhcp_if/p_log
@@ -0,0 +1,4 @@
+#!/bin/sh
+
+cd log/logdir || exit 1
+cat @* current | $PAGER
diff --git a/examples/var_service/dhcp_if/run b/examples/var_service/dhcp_if/run
new file mode 100755
index 0000000..aec79e0
--- /dev/null
+++ b/examples/var_service/dhcp_if/run
@@ -0,0 +1,23 @@
+#!/bin/sh
+
+exec 2>&1
+exec </dev/null
+
+pwd="$PWD"
+
+if="${PWD##*/dhcp_}"
+
+echo "* Upping iface $if"
+ip link set dev "$if" up
+
+echo "* Starting udhcpc"
+exec \
+env - PATH="$PATH" \
+softlimit \
+setuidgid root \
+udhcpc -vv \
+--hostname=null \
+--foreground \
+--interface="$if" \
+--pidfile="$pwd/udhcpc.pid" \
+--script="$pwd/dhcp_handler"
diff --git a/examples/var_service/dhcp_if/w_log b/examples/var_service/dhcp_if/w_log
new file mode 100755
index 0000000..34b19b3
--- /dev/null
+++ b/examples/var_service/dhcp_if/w_log
@@ -0,0 +1,4 @@
+#!/bin/sh
+
+cd log/logdir || exit 1
+watch -n2 'w=`ttysize w`; h=`ttysize h`; tail -$((h-3)) current 2>&1 | cut -b0-$((w-2))'
diff --git a/examples/var_service/dhcp_if_pinger/run b/examples/var_service/dhcp_if_pinger/run
new file mode 100755
index 0000000..20b2fc5
--- /dev/null
+++ b/examples/var_service/dhcp_if_pinger/run
@@ -0,0 +1,23 @@
+#!/bin/sh
+
+delay=67
+
+if=${PWD##*/dhcp_}
+if=${if%%_pinger}
+
+if test -f "$0.log"; then
+ tail -999 "$0.log" >"$0.log.new"
+ mv "$0.log.new" "$0.log"
+fi
+
+test -f "/var/service/dhcp_$if/dhcp_$if.out" || exec env - sleep "$delay"
+. "/var/service/dhcp_$if/dhcp_$if.out"
+test x"$router" != x"" || exec env - sleep "$delay"
+
+#echo "`date '+%Y-%m-%d %H:%M:%S'` Testing ping -c3 $router" >>"$0.log"
+ping -c3 "$router" && exec env - sleep "$delay"
+
+echo "`date '+%Y-%m-%d %H:%M:%S'` Restarting /var/service/dhcp_$if" >>"$0.log"
+sv t "/var/service/dhcp_$if"
+
+exec env - sleep "$delay"
diff --git a/examples/var_service/fw/conf/11.22.33.44.ipconf-- b/examples/var_service/fw/conf/11.22.33.44.ipconf--
new file mode 100644
index 0000000..9b44e90
--- /dev/null
+++ b/examples/var_service/fw/conf/11.22.33.44.ipconf--
@@ -0,0 +1,10 @@
+#!/bin/sh
+# If we have simple static address...
+#
+let cfg=cfg+1
+if[$cfg]=if
+ip[$cfg]=11.22.33.44
+ipmask[$cfg]=11.22.33.44/24
+gw[$cfg]=11.22.33.1
+net[$cfg]=0/0
+dns[$cfg]='11.22.33.2 11.22.33.3'
diff --git a/examples/var_service/fw/conf/192.168.0.1.ipconf b/examples/var_service/fw/conf/192.168.0.1.ipconf
new file mode 100644
index 0000000..5cf55db
--- /dev/null
+++ b/examples/var_service/fw/conf/192.168.0.1.ipconf
@@ -0,0 +1,11 @@
+#!/bin/sh
+# A small network with no routers
+# (maybe *we* are their router)
+#
+let cfg=cfg+1
+if[$cfg]=if
+ip[$cfg]=192.168.0.1
+ipmask[$cfg]=192.168.0.1/24
+### gw[$cfg]=
+### net[$cfg]=0/0
+### dns[$cfg]=''
diff --git a/examples/var_service/fw/conf/lo.ipconf b/examples/var_service/fw/conf/lo.ipconf
new file mode 100644
index 0000000..e6be5f0
--- /dev/null
+++ b/examples/var_service/fw/conf/lo.ipconf
@@ -0,0 +1,10 @@
+#!/bin/bash
+# Mostly redundant except when you need dns[]=your_static_dns_srv
+#
+let cfg=cfg+1
+if[$cfg]=lo
+ip[$cfg]=127.0.0.1
+ipmask[$cfg]=127.0.0.1/8
+gw[$cfg]=''
+net[$cfg]=''
+#dns[$cfg]=127.0.0.1
diff --git a/examples/var_service/fw/etc/hosts b/examples/var_service/fw/etc/hosts
new file mode 100644
index 0000000..f7ee533
--- /dev/null
+++ b/examples/var_service/fw/etc/hosts
@@ -0,0 +1,21 @@
+#!/bin/sh
+echo "\
+# This file is automagically regenerated
+# Note! /etc/nsswitch.conf may override this!
+
+# For loopbacking
+127.0.0.1 localhost
+
+# Our local IPs"
+
+hostname=`hostname`
+test "$hostname" || hostname=localhost
+domain=`(. /boot.conf; echo "$DNSDOMAINNAME")`
+test "$domain" && hostname="$hostname $hostname.$domain"
+
+ip -o a l \
+| grep -F 'inet ' \
+| sed -e 's/^.*inet //' -e 's:[ /].*$: '"$hostname"':'
+
+echo
+echo "# End of /etc/hosts"
diff --git a/examples/var_service/fw/etc/resolv.conf b/examples/var_service/fw/etc/resolv.conf
new file mode 100644
index 0000000..3f37b86
--- /dev/null
+++ b/examples/var_service/fw/etc/resolv.conf
@@ -0,0 +1,31 @@
+#!/bin/bash
+
+domain=`(. /boot.conf; echo "$DNSDOMAINNAME") 2>/dev/null`
+
+echo "# This file is automagically regenerated with each boot"
+echo
+test "$domain" && echo "domain $domain"
+test "$domain" && echo "search $domain"
+echo
+echo "# Note that nslookup can choke on DNS server which itself"
+echo "# does NOT have domain name. Other things can work fine."
+echo
+# # If we run DNS cache:
+# echo "nameserver 127.0.0.1"
+# exit
+
+prio=0
+i=0; while test "${if[$i]}"; do
+ test x"${dns_prio[$i]}" != x"" \
+ && test "${dns_prio[$i]}" -gt "$prio" \
+ && prio="${dns_prio[$i]}"
+let i++; done
+
+i=0; while test "${if[$i]}"; do
+ for d in ${dns[$i]}; do
+ p="${dns_prio[$i]}"
+ test x"$p" == x"" && p=0
+ test x"$p" == x"$prio" || continue
+ echo "nameserver $d"
+ done
+let i++; done
diff --git a/examples/var_service/fw/run b/examples/var_service/fw/run
new file mode 100755
index 0000000..f02f53d
--- /dev/null
+++ b/examples/var_service/fw/run
@@ -0,0 +1,211 @@
+#!/bin/bash
+# (using bashisms: "function", arrays)
+
+user=root
+extif=if
+ext_open_tcp="21 22 80" # space-separated
+
+# Make ourself one-shot
+sv o .
+# Debug
+#date '+%Y-%m-%d %H:%M:%S' >>"$0.log"
+
+service=`basename "$PWD"`
+rundir="/var/run/service/$service"
+
+### filter This is the default table (if no -t option is passed). It contains
+### the built-in chains INPUT (for packets coming into the box itself),
+### FORWARD (for packets being routed through the box), and OUTPUT (for
+### locally-generated packets).
+###
+### nat This table is consulted when a packet that creates a new connection
+### is encountered. It consists of three built-ins: PREROUTING (for
+### altering packets as soon as they come in), OUTPUT (for altering
+### locally-generated packets before routing), and POSTROUTING (for
+### altering packets as they are about to go out).
+###
+### mangle It had two built-in chains: PREROUTING (for altering incoming
+### packets before routing) and OUTPUT (for altering locally-generated
+### packets before routing). Recently three other built-in
+### chains are added: INPUT (for packets coming into the box
+### itself), FORWARD (for altering packets being routed through the
+### box), and POSTROUTING (for altering packets as they are about to go
+### out).
+###
+### ...iface... ...iface...
+### | ^
+### v |
+### -mangle,NAT- -mangle,filter- -mangle,NAT--
+### |PREROUTING|-->[Routing]-->|FORWARD |-->|POSTROUTING|
+### ------------ | ^ --------------- -------------
+### | | ^
+### | +--if NATed------------+ |
+### v | |
+### -mangle,filter- -mangle,NAT,filter-
+### |INPUT | +->[Routing]->|OUTPUT |
+### --------------- | -------------------
+### | |
+### v |
+### ... Local Process...
+
+doit() {
+ echo "# $*"
+ "$@"
+}
+
+#exec >/dev/null
+exec >"$0.out"
+exec 2>&1
+exec </dev/null
+
+umask 077
+
+# Make sure rundir/ exists
+mkdir -p "$rundir" 2>/dev/null
+chown -R "$user:" "$rundir"
+chmod -R a=rX "$rundir"
+rm -rf rundir 2>/dev/null
+ln -s "$rundir" rundir
+
+# Timestamping
+date '+%Y-%m-%d %H:%M:%S'
+
+
+echo; echo "* Reading IP config"
+cfg=-1
+# static cfg dhcp,zeroconf etc
+for ipconf in conf/*.ipconf "$rundir"/*.ipconf; do
+ if test -f "$ipconf"; then
+ echo "+ $ipconf"
+ . "$ipconf"
+ fi
+done
+
+echo; echo "* Configuring hardware"
+#doit ethtool -s if autoneg off speed 100 duplex full
+#doit ethtool -K if rx off tx off sg off tso off
+
+echo; echo "* Resetting address and routing info"
+doit ip a f dev lo
+i=0; while test "${if[$i]}"; do
+ doit ip a f dev "${if[$i]}"
+ doit ip r f dev "${if[$i]}" root 0/0
+let i++; done
+
+echo; echo "* Configuring addresses"
+doit ip a a dev lo 127.0.0.1/8 scope host
+doit ip a a dev lo ::1/128 scope host
+i=0; while test "${if[$i]}"; do
+ if test "${ipmask[$i]}"; then
+ doit ip a a dev "${if[$i]}" "${ipmask[$i]}" brd +
+ doit ip l set dev "${if[$i]}" up
+ fi
+let i++; done
+
+echo; echo "* Configuring routes"
+i=0; while test "${if[$i]}"; do
+ if test "${net[$i]}" && test "${gw[$i]}"; then
+ doit ip r a "${net[$i]}" via "${gw[$i]}"
+ fi
+let i++; done
+
+echo; echo "* Recreating /etc/* files reflecting new network configuration:"
+for i in etc/*; do
+ n=`basename "$i"`
+ echo "+ $n"
+ (. "$i") >"/etc/$n"
+ chmod 644 "/etc/$n"
+done
+
+
+# Usage: new_chain <chain> [<table>]
+new_chain() {
+ local t=""
+ test x"$2" != x"" && t="-t $2"
+ doit iptables $t -N $1
+ ipt="iptables $t -A $1"
+}
+
+echo; echo "* Reset iptables"
+doit iptables --flush
+doit iptables --delete-chain
+doit iptables --zero
+doit iptables -t nat --flush
+doit iptables -t nat --delete-chain
+doit iptables -t nat --zero
+doit iptables -t mangle --flush
+doit iptables -t mangle --delete-chain
+doit iptables -t mangle --zero
+
+echo; echo "* Configure iptables"
+doit modprobe nf_nat_ftp
+doit modprobe nf_nat_tftp
+doit modprobe nf_conntrack_ftp
+doit modprobe nf_conntrack_tftp
+
+# *** nat ***
+# INCOMING TRAFFIC
+ipt="iptables -t nat -A PREROUTING"
+# nothing here
+
+# LOCALLY ORIGINATED TRAFFIC
+ipt="iptables -t nat -A OUTPUT"
+# nothing here
+
+# OUTGOING TRAFFIC
+ipt="iptables -t nat -A POSTROUTING"
+# Masquerade boxes on my private net
+doit $ipt -s 192.168.0.0/24 -o $extif -j MASQUERADE
+
+# *** mangle ***
+### DEBUG
+### ipt="iptables -t mangle -A PREROUTING"
+### doit $ipt -s 192.168.0.0/24 -j RETURN
+### ipt="iptables -t mangle -A FORWARD"
+### doit $ipt -s 192.168.0.0/24 -j RETURN
+### ipt="iptables -t mangle -A POSTROUTING"
+### doit $ipt -s 192.168.0.0/24 -j RETURN
+# nothing here
+
+# *** filter ***
+#
+new_chain iext filter
+#doit $ipt -s 203.177.104.72 -j DROP # Some idiot probes my ssh
+#doit $ipt -d 203.177.104.72 -j DROP # Some idiot probes my ssh
+doit $ipt -m state --state ESTABLISHED,RELATED -j RETURN # FTP data etc is ok
+if test "$ext_open_tcp"; then
+ portlist="${ext_open_tcp// /,}"
+ doit $ipt -p tcp -m multiport --dports $portlist -j RETURN
+fi
+doit $ipt -p tcp -j REJECT # Anything else isn't ok. REJECT = irc opens faster
+ # (it probes proxy ports, DROP will incur timeout delays)
+ipt="iptables -t filter -A INPUT"
+doit $ipt -i $extif -j iext
+
+
+echo; echo "* Enabling forwarding"
+echo 1 >/proc/sys/net/ipv4/ip_forward
+echo "/proc/sys/net/ipv4/ip_forward: `cat /proc/sys/net/ipv4/ip_forward`"
+
+
+# Signal everybody that firewall is up
+date '+%Y-%m-%d %H:%M:%S' >"$rundir/up"
+
+# Ok, spew out gobs of info and disable ourself
+echo; echo "* IP:"
+ip a l
+echo; echo "* Routing:"
+ip r l
+echo; echo "* Firewall:"
+{
+echo '---FILTER--';
+iptables -v -L -x -n;
+echo '---NAT-----';
+iptables -t nat -v -L -x -n;
+echo '---MANGLE--';
+iptables -t mangle -v -L -x -n;
+} \
+| grep -v '^$' | grep -Fv 'bytes target'
+echo
+
+echo "* End of firewall configuration"
diff --git a/examples/var_service/fw/stat b/examples/var_service/fw/stat
new file mode 100755
index 0000000..08736ad
--- /dev/null
+++ b/examples/var_service/fw/stat
@@ -0,0 +1,12 @@
+#!/bin/sh
+
+echo; echo "* Firewall:"
+{
+echo '---FILTER--';
+iptables -v -L -x -n;
+echo '---NAT-----';
+iptables -t nat -v -L -x -n;
+echo '---MANGLE--';
+iptables -t mangle -v -L -x -n;
+} \
+| grep -v '^$' | grep -Fv 'bytes target' | $PAGER
diff --git a/examples/var_service/ifplugd_if/ifplugd_handler b/examples/var_service/ifplugd_if/ifplugd_handler
new file mode 100755
index 0000000..4962fcf
--- /dev/null
+++ b/examples/var_service/ifplugd_if/ifplugd_handler
@@ -0,0 +1,15 @@
+#!/bin/sh
+# parameters:
+# $1: interface
+# $2: state
+
+if test -d "/var/service/dhcp_$1"; then
+ if test x"$2" = x"down"; then
+ echo "Downing /var/service/dhcp_$1"
+ sv d "/var/service/dhcp_$1"
+ fi
+ if test x"$2" = x"up"; then
+ echo "Upping /var/service/dhcp_$1"
+ sv u "/var/service/dhcp_$1"
+ fi
+fi
diff --git a/examples/var_service/ifplugd_if/log/run b/examples/var_service/ifplugd_if/log/run
new file mode 100755
index 0000000..560d1b1
--- /dev/null
+++ b/examples/var_service/ifplugd_if/log/run
@@ -0,0 +1,21 @@
+#!/bin/sh
+
+user=logger
+
+logdir="/var/log/service/`(cd ..;basename $PWD)`"
+mkdir -p "$logdir" 2>/dev/null
+chown -R "$user": "$logdir"
+chmod -R go-rwxst,u+rwX "$logdir"
+rm logdir
+ln -s "$logdir" logdir
+
+# make this dir accessible to logger
+chmod a+rX .
+
+exec >/dev/null
+exec 2>&1
+exec \
+env - PATH="$PATH" \
+softlimit \
+setuidgid "$user" \
+svlogd -tt "$logdir"
diff --git a/examples/var_service/ifplugd_if/p_log b/examples/var_service/ifplugd_if/p_log
new file mode 100755
index 0000000..a2521be
--- /dev/null
+++ b/examples/var_service/ifplugd_if/p_log
@@ -0,0 +1,4 @@
+#!/bin/sh
+
+cd log/logdir || exit 1
+cat @* current | $PAGER
diff --git a/examples/var_service/ifplugd_if/run b/examples/var_service/ifplugd_if/run
new file mode 100755
index 0000000..44ddbc4
--- /dev/null
+++ b/examples/var_service/ifplugd_if/run
@@ -0,0 +1,32 @@
+#!/bin/sh
+
+exec 2>&1
+exec </dev/null
+
+pwd="$PWD"
+
+if="${PWD##*/ifplugd_}"
+
+echo "* Starting ifplugd [$$]"
+exec \
+env - PATH="$PATH" \
+softlimit \
+setuidgid root \
+ifplugd -apq -n -s -i "$if" -r "$pwd/ifplugd_handler"
+
+#-n Do not daemonize
+#-s Do not log to syslog
+#-i IFACE Interface
+#-f/-F Treat link detection error as link down/link up (otherwise exit on error)
+#-a Do not up interface automatically
+#-M Monitor creation/destruction of interface (otherwise it must exist)
+#-r PROG Script to run
+#-x ARG Extra argument for script
+#-I Dont exit on nonzero exit code from script
+#-p Dont run script on daemon startup
+#-q Dont run script on daemon quit
+#-l Run script on startup even if no cable is detected
+#-t SECS Poll time in seconds
+#-u SECS Delay before running script after link up
+#-d SECS Delay after link down
+#-m MODE API mode (mii, priv, ethtool, wlan, auto)
diff --git a/examples/var_service/ifplugd_if/w_log b/examples/var_service/ifplugd_if/w_log
new file mode 100755
index 0000000..34b19b3
--- /dev/null
+++ b/examples/var_service/ifplugd_if/w_log
@@ -0,0 +1,4 @@
+#!/bin/sh
+
+cd log/logdir || exit 1
+watch -n2 'w=`ttysize w`; h=`ttysize h`; tail -$((h-3)) current 2>&1 | cut -b0-$((w-2))'
diff --git a/examples/var_service/nmeter/run b/examples/var_service/nmeter/run
new file mode 100755
index 0000000..fa0837b
--- /dev/null
+++ b/examples/var_service/nmeter/run
@@ -0,0 +1,21 @@
+#!/bin/sh
+
+# Since per-process /proc/net/ (-> /proc/self/net/) appeared,
+# we need to be root
+user=root
+tty="/dev/tty9"
+
+chmod -R a+X . # or else env will moan
+chown $user: $tty # devfs made happy
+
+cmd="nmeter '%t %c x %x p%p f %f b %b m %m if%[nif]'"
+
+exec >/dev/null
+exec 2>&1
+exec </dev/null
+
+eval exec \
+setuidgid "$user" \
+env - PATH="$PATH" \
+<"$tty" >"$tty" 2>&1 \
+$cmd