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#!/bin/bash
# loadbars-remote.sh - Emits loadbars protocol (M LOADAVG, M MEMSTATS, M NETSTATS, M DISKSTATS, M CPUSTATS)
# for local or remote execution. No Perl required.
# Usage: bash loadbars-remote.sh
# Interval for CPU sampling (seconds)
INTERVAL=0.14
while true; do
# Load average: first 3 fields of /proc/loadavg joined by ;
echo "M LOADAVG"
read -r l1 l5 l15 _ < /proc/loadavg 2>/dev/null || true
echo "${l1:-0};${l5:-0};${l15:-0}"
# Memory: full /proc/meminfo
echo "M MEMSTATS"
cat /proc/meminfo 2>/dev/null || true
# Network: /proc/net/dev, skip 2 header lines, then "iface: rx... tx..."
echo "M NETSTATS"
while IFS= read -r line; do
line="${line/:/ }"
set -- $line
# $1=iface, $2=rx_bytes $3=rx_packets $4=rx_errs $5=rx_drop ... $10=tx_bytes $11=tx_packets $12=tx_errs $13=tx_drop
if [ -n "$2" ] || [ -n "${10:-}" ]; then
echo "$1:b=${2:-0};tb=${10:-0};p=${3:-0};tp=${11:-0} e=${4:-0};te=${12:-0};d=${5:-0};td=${13:-0}"
fi
done < <(tail -n +3 /proc/net/dev 2>/dev/null)
# Disk: /proc/diskstats, one line per block device with cumulative counters
echo "M DISKSTATS"
while IFS= read -r line; do
set -- $line
# $1=major $2=minor $3=device $4=reads_completed $5=reads_merged
# $6=sectors_read $7=ms_reading $8=writes_completed $9=writes_merged
# $10=sectors_written $11=ms_writing $12=ios_in_progress $13=ms_io
[ -n "$3" ] && echo "$3:rs=${6:-0};ws=${10:-0};rt=${7:-0};wt=${11:-0};io=${13:-0}"
done < /proc/diskstats 2>/dev/null
# CPU: /proc/stat, 20 times with INTERVAL sleep
echo "M CPUSTATS"
for _ in 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20; do
cat /proc/stat 2>/dev/null || true
sleep "$INTERVAL" 2>/dev/null || true
done
done
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