Fake copy of a part of /proc/net fs, with about 200ms of latency

proxy-proc-net.sh

#!/bin/bash
OUTPUT="/dev/shm/fakenet/";

if [ ! -d "$OUTPUT" ]; then
        mkdir -p $OUTPUT/{rpc,stat,ip_vs}
fi

SOURCES="/proc/net/dev
/proc/net/ip_vs_stats
/proc/net/ip_vs/stats
/proc/net/netstat
/proc/net/rpc/nfs
/proc/net/rpc/nfsd
/proc/net/snmp
/proc/net/snmp6
/proc/net/softnet_stat
/proc/net/stat/conntrack
/proc/net/stat/nf_conntrack
/proc/net/stat/synproxy"

NETFILES=""
for SOURCE in $SOURCES; do
        if [ -f "$SOURCE" ]; then
                NETFILES="$NETFILES $SOURCE"
        fi
done

while [ true ]; do
        for NETFILE in $NETFILES; do
                OUTFILE="${NETFILE:10}"
                echo "$(<$NETFILE)" > $OUTPUT$OUTFILE
        done
        #date +%s.%N
        sleep 0.18
done