├── net-speed.tmux
└── scripts
    ├── helpers.sh
    └── net-speed.sh


/net-speed.tmux:
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 1 | #!/usr/bin/env bash
 2 | 
 3 | SDIR=$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)
 4 | source "$SDIR/scripts/helpers.sh"
 5 | 
 6 | upload_speed_format()   {
 7 |     get_tmux_option @upload_speed_format   "%%7s"
 8 | }
 9 | download_speed_format() {
10 |     get_tmux_option @download_speed_format "%%7s"
11 | }
12 | 
13 | upload_speed="#($SDIR/scripts/net-speed.sh   tx_bytes '$(upload_speed_format)')"
14 | download_speed="#($SDIR/scripts/net-speed.sh rx_bytes '$(download_speed_format)')"
15 | 
16 | upload_interpolation="\#{upload_speed}"
17 | download_interpolation="\#{download_speed}"
18 | 
19 | do_interpolation() {
20 |     local input=$1
21 |     local result=""
22 | 
23 |     result=${input/$upload_interpolation/$upload_speed}
24 |     result=${result/$download_interpolation/$download_speed}
25 | 
26 |     echo "$result"
27 | }
28 | 
29 | update_tmux_option() {
30 |     local option=$1
31 |     local option_value=$(get_tmux_option "$option")
32 |     set_tmux_option "$option" "$(do_interpolation "$option_value")"
33 | }
34 | 
35 | main() {
36 |     update_tmux_option "status-right"
37 |     update_tmux_option "status-left"
38 | }
39 | main
40 | 


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/scripts/helpers.sh:
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 1 | set_tmux_option() {
 2 |     local option="$1"
 3 |     local value="$2"
 4 |     tmux set-option -gq "$option" "$value"
 5 | }
 6 | 
 7 | get_tmux_option() {
 8 |     local option=$1
 9 |     local default_value=$2
10 |     local option_value="$(tmux show-option -gqv "$option")"
11 | 
12 |     [[ -z "$option_value" ]] && echo $default_value || echo $option_value
13 | }
14 | 
15 | get_os() {
16 |     case "$OSTYPE" in
17 |         linux*)   echo "linux" ;;
18 |         darwin*)  echo "osx" ;;
19 |         solaris*) echo "solaris" ;;
20 |         freebsd*) echo "freebsd" ;;
21 |         netbsd*)  echo "netbsd" ;;
22 |         openbsd*) echo "openbsd" ;;
23 |         bsd*)     echo "bsd" ;;
24 |         msys*)    echo "windows" ;;
25 |         *)        echo "unknown" ;;
26 |     esac
27 | }
28 | 
29 | sum_column() {
30 |     awk '{sum += $1;}END{printf("%.0f",sum);}'
31 | }
32 | 
33 | # ref: https://unix.stackexchange.com/a/98790 @John
34 | bytestohuman() {
35 |     local L_BYTES="${1:-0}"
36 |     local L_BASE="${2:-1024}"
37 |     (awk -v bytes="${L_BYTES}" -v base="${L_BASE}" 'function human(x, base) {
38 |          if(base!=1024)base=1000
39 | 
40 |          s="BKMGTEPYZ"
41 |          while (x>=base && length(s)>1)
42 |                {x/=base; s=substr(s,2)}
43 |          s=substr(s,1,1)
44 |          xf=((s=="B")?"%4d": (x > 99 ? "%4d" : "%4.1f"))
45 |          return sprintf( (xf "%s\n"), x, s)
46 |       }
47 |       BEGIN{print human(bytes, base)}')
48 | }
49 | 


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/scripts/net-speed.sh:
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 1 | #!/usr/bin/env bash
 2 | 
 3 | SDIR=$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)
 4 | source "$SDIR/helpers.sh"
 5 | 
 6 | # $1: rx_bytes/tx_bytes
 7 | get_bytes() {
 8 |     case $(get_os) in
 9 |         osx)
10 |             netstat -ibn | sort -u -k1,1 | grep ':' | grep -Ev '^(lo|docker).*' |
11 |                 awk '{rx += $7;tx += $10;}END{print "rx_bytes "rx,"\ntx_bytes "tx}' |
12 |                 grep "$1" | awk '{print $2}'
13 |             ;;
14 |         linux)
15 |             for file in /sys/class/net/*; do
16 |                 [[ $file =~ .*/(lo|docker.*) ]] || cat "$file/statistics/$1"
17 |             done | sum_column 2>/dev/null
18 |             ;;
19 |         freebsd)
20 |             netstat -ibnW | sort -u -k1,1 | grep ':' | grep -Ev '^lo.*' |
21 |                 awk '{rx += $8;tx += $11;}END{print "rx_bytes "rx,"\ntx_bytes "tx}' |
22 |                 grep "$1" | awk '{print $2}'
23 |             ;;
24 |         netbsd|openbsd)
25 |             netstat -ibn | sort -u -k1,1 | grep ':' | grep -Ev '^lo.*' |
26 |                 awk '{rx += $5;tx += $6;}END{print "rx_bytes "rx,"\ntx_bytes "tx}' |
27 |                 grep "$1" | awk '{print $2}'
28 |             ;;
29 |         *)
30 |             echo 0
31 |             ;;
32 |     esac
33 | }
34 | 
35 | # $1: rx_bytes/tx_bytes
36 | get_speed() {
37 |     local pre cur diff speed pre_var
38 |     pre_var="@netspeed_$1"
39 |     cur=$(get_bytes "$1")
40 |     pre=$(get_tmux_option "$pre_var" "$cur")
41 |     diff=$((cur - pre))
42 |     (( diff < 0 )) && diff=0
43 |     speed=$(bytestohuman $diff)
44 |     # speed=$(numfmt --to=iec --padding=7 $diff)
45 |     echo "${speed}/s"
46 |     set_tmux_option "$pre_var" "$cur"
47 | }
48 | 
49 | # $1: tx_bytes/tx_bytes
50 | # $2: format
51 | main() {
52 |     printf "${2:-%8s}" "$(get_speed "$1")"
53 | }
54 | 
55 | main "$@"
56 | 


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