blob: cef4004f4537be5233e68f86370e0a55544748a5 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
|
#!/bin/bash
# Public Domain
# (someone claimed the next lines would be useful for…
# people. So here goes: © 2012 Stefan Breunig
# stefan+measure-net-speed@mathphys.fsk.uni-heidelberg.de)
# path to store the old results in
path="/dev/shm/measure-net-speed"
# grabbing data for each adapter.
# You can find the paths to your adapters using
# find /sys/devices -name statistics
# If you have more (or less) than two adapters, simply adjust the script here
# and in the next block.
eth0="/sys/devices/pci0000:00/0000:00:19.0/net/eth0/statistics"
wlan0="/sys/devices/pci0000:00/0000:00:1c.1/0000:03:00.0/net/wlan0/statistics"
read eth0_rx < "${eth0}/rx_bytes"
read eth0_tx < "${eth0}/tx_bytes"
read wlan0_rx < "${wlan0}/rx_bytes"
read wlan0_tx < "${wlan0}/tx_bytes"
# get time and sum of rx/tx for combined display
time=$(date +%s)
rx=$(( $eth0_rx + $wlan0_rx ))
tx=$(( $eth0_tx + $wlan0_tx ))
# write current data if file does not exist. Do not exit, this will cause
# problems if this file is sourced instead of executed as another process.
if ! [[ -f "${path}" ]]; then
echo "${time} ${rx} ${tx}" > "${path}"
chmod 0666 "${path}"
fi
# read previous state and update data storage
read old < "${path}"
echo "${time} ${rx} ${tx}" > "${path}"
# parse old data and calc time passed
old=(${old//;/ })
time_diff=$(( $time - ${old[0]} ))
# sanity check: has a positive amount of time passed
if [[ "${time_diff}" -gt 0 ]]; then
# calc bytes transferred, and their rate in byte/s
rx_diff=$(( $rx - ${old[1]} ))
tx_diff=$(( $tx - ${old[2]} ))
rx_rate=$(( $rx_diff / $time_diff ))
tx_rate=$(( $tx_diff / $time_diff ))
# shift by 10 bytes to get KiB/s. If the value is larger than
# 1024^2 = 1048576, then display MiB/s instead (simply cut off
# the last two digits of KiB/s). Since the values only give an
# rough estimate anyway, this improper rounding is negligible.
# incoming
rx_kib=$(( $rx_rate >> 10 ))
if [[ "$rx_rate" -gt 1048576 ]]; then
echo -n "${rx_kib:0:-3}.${rx_kib: -3:-2} M↓"
else
echo -n "${rx_kib} K↓"
fi
echo -n " "
# outgoing
tx_kib=$(( $tx_rate >> 10 ))
if [[ "$tx_rate" -gt 1048576 ]]; then
echo -n "${tx_kib:0:-3}.${tx_kib: -3:-2} M↑"
else
echo -n "${tx_kib} K↑"
fi
else
echo -n " ? "
fi
|
