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#!/bin/bash
# loadbars-remote-darwin.sh - macOS version using sysctl, vm_stat, netstat, and iostat
# Emits loadbars protocol (M LOADAVG, M MEMSTATS, M NETSTATS, M CPUSTATS)
# Interval for CPU sampling (seconds)
INTERVAL=0.14
# Get number of CPUs
NCPU=$(sysctl -n hw.ncpu)
while true; do
# Load average: from sysctl
echo "M LOADAVG"
sysctl -n vm.loadavg 2>/dev/null | awk '{print $2";"$3";"$4}' || echo "0;0;0"
# Memory: convert vm_stat output to /proc/meminfo-like format
echo "M MEMSTATS"
vm_stat 2>/dev/null | awk '
BEGIN { pagesize = 4096 }
/page size of ([0-9]+)/ { pagesize = $8 }
/Pages free:/ { free = $3 * pagesize / 1024 }
/Pages active:/ { active = $3 * pagesize / 1024 }
/Pages inactive:/ { inactive = $3 * pagesize / 1024 }
/Pages speculative:/ { speculative = $3 * pagesize / 1024 }
/Pages wired down:/ { wired = $4 * pagesize / 1024 }
/Pages occupied by compressor:/ { compressed = $5 * pagesize / 1024 }
END {
total = free + active + inactive + speculative + wired + compressed
printf "MemTotal: %d kB\n", total
printf "MemFree: %d kB\n", free
printf "MemAvailable: %d kB\n", free + inactive + speculative
printf "SwapTotal: 0 kB\n"
printf "SwapFree: 0 kB\n"
}
'
# Network: use netstat -ibn for interface stats
echo "M NETSTATS"
netstat -ibn 2>/dev/null | awk '
NR > 1 && $1 !~ /^Name/ && $3 ~ /^<Link/ {
# netstat -ibn output on macOS:
# Name Mtu Network Address Ipkts Ierrs Ibytes Opkts Oerrs Obytes Coll
iface = $1
ipkts = $5
ierrs = $6
ibytes = $7
opkts = $8
oerrs = $9
obytes = $10
if (ibytes ~ /^[0-9]+$/ && obytes ~ /^[0-9]+$/) {
printf "%s:b=%s;tb=%s;p=%s;tp=%s e=%s;te=%s;d=0;td=0\n",
iface, ibytes, obytes, ipkts, opkts, ierrs, oerrs
}
}
'
# CPU: macOS doesn't have /proc/stat, use iostat for CPU percentages
echo "M CPUSTATS"
for _ in 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20; do
# iostat output on macOS: user sys idle
# Convert to /proc/stat format: cpu user nice system idle iowait irq softirq steal guest guest_nice
# We'll simulate values since macOS doesn't provide all fields
iostat -c 1 2>/dev/null | tail -1 | awk -v ncpu="$NCPU" '
{
# iostat columns: %user %nice %sys %idle (approximately)
# Multiply by ncpu to get total ticks (simulated)
user = int($3 * ncpu * 10)
sys = int($4 * ncpu * 10)
idle = int($5 * ncpu * 10)
# Output in /proc/stat format
printf "cpu %d 0 %d %d 0 0 0 0 0 0\n", user, sys, idle
}
'
sleep "$INTERVAL" 2>/dev/null || true
done
done
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