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#!/usr/bin/env python3
#
# $Id: iotop.py 1160 2011-10-14 18:50:36Z g.rodola@gmail.com $
#
# Copyright (c) 2009, Giampaolo Rodola'. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
"""Shows real-time network statistics.
Author: Giampaolo Rodola' <g.rodola@gmail.com>
$ python3 scripts/nettop.py
-----------------------------------------------------------
total bytes: sent: 1.49 G received: 4.82 G
total packets: sent: 7338724 received: 8082712
wlan0 TOTAL PER-SEC
-----------------------------------------------------------
bytes-sent 1.29 G 0.00 B/s
bytes-recv 3.48 G 0.00 B/s
pkts-sent 7221782 0
pkts-recv 6753724 0
eth1 TOTAL PER-SEC
-----------------------------------------------------------
bytes-sent 131.77 M 0.00 B/s
bytes-recv 1.28 G 0.00 B/s
pkts-sent 0 0
pkts-recv 1214470 0
"""
import sys
import time
try:
import curses
except ImportError:
sys.exit('platform not supported')
import psutil
from psutil._common import bytes2human
lineno = 0
win = curses.initscr()
def printl(line, highlight=False):
"""A thin wrapper around curses's addstr()."""
global lineno
try:
if highlight:
line += " " * (win.getmaxyx()[1] - len(line))
win.addstr(lineno, 0, line, curses.A_REVERSE)
else:
win.addstr(lineno, 0, line, 0)
except curses.error:
lineno = 0
win.refresh()
raise
else:
lineno += 1
def poll(interval):
"""Retrieve raw stats within an interval window."""
tot_before = psutil.net_io_counters()
pnic_before = psutil.net_io_counters(pernic=True)
# sleep some time
time.sleep(interval)
tot_after = psutil.net_io_counters()
pnic_after = psutil.net_io_counters(pernic=True)
return (tot_before, tot_after, pnic_before, pnic_after)
def refresh_window(tot_before, tot_after, pnic_before, pnic_after):
"""Print stats on screen."""
global lineno
# totals
printl(
"total bytes: sent: {:<10} received: {}".format(
bytes2human(tot_after.bytes_sent),
bytes2human(tot_after.bytes_recv),
)
)
# per-network interface details: let's sort network interfaces so
# that the ones which generated more traffic are shown first
printl("")
nic_names = list(pnic_after.keys())
nic_names.sort(key=lambda x: sum(pnic_after[x]), reverse=True)
for name in nic_names:
stats_before = pnic_before[name]
stats_after = pnic_after[name]
templ = "{:<15s} {:>15} {:>15}"
# fmt: off
printl(templ.format(name, "TOTAL", "PER-SEC"), highlight=True)
printl(templ.format(
"bytes-sent",
bytes2human(stats_after.bytes_sent),
bytes2human(
stats_after.bytes_sent - stats_before.bytes_sent) + '/s',
))
printl(templ.format(
"bytes-recv",
bytes2human(stats_after.bytes_recv),
bytes2human(
stats_after.bytes_recv - stats_before.bytes_recv) + '/s',
))
printl(templ.format(
"pkts-sent",
stats_after.packets_sent,
stats_after.packets_sent - stats_before.packets_sent,
))
printl(templ.format(
"pkts-recv",
stats_after.packets_recv,
stats_after.packets_recv - stats_before.packets_recv,
))
printl("")
# fmt: on
win.refresh()
lineno = 0
def setup():
curses.start_color()
curses.use_default_colors()
for i in range(curses.COLORS):
curses.init_pair(i + 1, i, -1)
curses.endwin()
win.nodelay(1)
def tear_down():
win.keypad(0)
curses.nocbreak()
curses.echo()
curses.endwin()
def main():
setup()
try:
interval = 0
while True:
if win.getch() == ord('q'):
break
args = poll(interval)
refresh_window(*args)
interval = 0.5
except (KeyboardInterrupt, SystemExit):
pass
finally:
tear_down()
if __name__ == '__main__':
main()
|
