Post your handy self made command line utilities

awesome8x · 2016-03-17 23:53:00

Trilby,

Yeah, turns out that and the "--unneeded" flag were what I was looking for. Thank you, and sorry for posting a useless script.

drcouzelis · 2016-03-18 12:46:31

awesome8x wrote:

Yeah, turns out that and the "--unneeded" flag were what I was looking for. Thank you, and sorry for posting a useless script.

It wasn't useless. You learned something and I learned something.

quequotion · 2016-03-20 03:51:53

As usual, iBus was not working as advertised.

gnome-control-center keyboard sets the keys (Shift)+Super+Space to cycle input sources--but nothing recognizes the keys, whatever is set. Gnome-shell might be expected to make the connection somehow. However, iBus does recognize its own configurable key, set by ibus-setup.

I don't know what GNOME devs have in mind with two places to configure keys for the same purpose and one that doesn't work but, whatever, making my own solution (again).

ibus-toggle

#! /bin/bash
if [ -n "$(pidof ibus-daemon)" ]; then
  ibus exit
else
  ibus-daemon -drx
fi

To emulate the intended behavior, fix a few things in gnome-control-center keyboard:

Disable non-functional (Shift)+Super+Space shortcuts:

Add a new custom shortcut to toggle iBus:

Cycle individual input methods with the key set by ibus-setup:

ibus-toggle also comes in handy with those applications that do not recognize iBus's input.

Last edited by quequotion (2016-03-20 12:13:04)

Docbroke · 2016-03-20 10:31:35

simple script to toggle touchpad on/off, (used with keybinding to Fn+F5)

#!/bin/bash

pad=$(synclient | grep TouchpadOff | awk -F= '{print $2}')

if [ ${pad} == 0 ]; then synclient TouchpadOff=1
fi

if [ ${pad} == 1 ]; then synclient TouchpadOff=0
fi

Diraso · 2016-03-20 11:10:49

I use a similar script, but i also move the cursor out of view / back to the center of the screen.

#!/bin/bash

TPSTATUS=$(synclient -l | grep -c 'TouchpadOff.*=.*0')

# Move mouse out of the way, if xdotool is present
if [[ -x /usr/bin/xdotool ]]; then
    if [[ $TPSTATUS -eq 0 ]]; then
        /usr/bin/xdotool mousemove --polar 0 0
    else
        /usr/bin/xdotool mousemove --polar 135 5000
    fi
fi

synclient TouchpadOff=$TPSTATUS

Alad · 2016-03-20 11:36:26

Docbroke wrote:

simple script to toggle touchpad on/off, (used with keybinding to Fn+F5)

You can do it all in awk (trackpad-toggle)

#!/bin/sh
synclient TouchpadOff=$(synclient -l | awk '/TouchpadOff/ {print !$3}')

grep -c as ^ works too.

Last edited by Alad (2016-03-20 11:38:54)

Docbroke · 2016-03-20 11:58:26

that's awksome!
I'm just taking first baby-steps in bash-world!

Earnestly · 2016-03-20 12:30:14

This isn't bash though, it's using ! to negate the value under $3 in awk, thus if the value is 0, it returns 1, and if it's 1 (or anything non-zero) it returns 0. (NB. Awk also uses $1, $2, .., $n notation but for fields.)

PS: See http://wiki.bash-hackers.org/syntax/expansion/cmdsubst

Last edited by Earnestly (2016-03-20 12:33:26)

ewaller · 2016-03-20 15:52:10

Here is my tocuchpad toggle, with notifications

#! /usr/bin/bash

foo=$( synclient | grep TouchpadOff | grep 0 )
var=$?
if [ $var -eq  0 ]
then 
   notify-send "Touchpad State" off
   synclient TouchpadOff=1
else
   notify-send "Touchpad State" on
   synclient TouchpadOff=0
fi

I bind it to alt-space. Seems we all have the same problem

Last edited by ewaller (2016-03-20 15:52:43)

Trilby · 2016-03-20 15:57:23

ewaller wrote:

Seems we all have the same problem

Not me. In my xinitrc:

synclient TouchpadOff=1

Problem solved

(I love trackpoints.)

drcouzelis · 2016-03-22 17:10:52

Earnestly wrote:

This isn't bash though, it's using ! to negate the value under $3 in awk, thus if the value is 0, it returns 1, and if it's 1 (or anything non-zero) it returns 0. (NB. Awk also uses $1, $2, .., $n notation but for fields.)

I can't believe I actually understand and used awk at some point in my life. It's an amazing and super powerful language but... I think it took, like, 3 weeks for me to understand it and only 1 week for me to forget everything I learned.

Alad · 2016-03-22 23:00:32

I can't believe I actually understand and used awk at some point in my life. It's an amazing and super powerful language but... I think it took, like, 3 weeks for me to understand it and only 1 week for me to forget everything I learned.

info gawk

also: https://www.youtube.com/watch?v=Sg4U4r_AgJU

Last edited by Alad (2016-03-22 23:00:42)

Docbroke · 2016-03-23 06:44:03

I got some inspiration from "grep -c" usage and created one more script to run slock on lid-close. Here is the script

#!/bin/bash

# LID=$(cat /proc/acpi/button/lid/LID0/state | awk '{print $2}')


LID=$(cat /proc/acpi/button/lid/LID0/state | grep -c 'state:.*open')

if [ ${LID} == 0 ]; then slock
fi

and here is the service file

[Unit]
Description=slock on lid close

[Service]
Type=simple
User=sharad
Environment=DISPLAY=:0
ExecStart=/home/sharad/bin/lid
Restart=always
RestartSec=1

I am almost sure that I am not doing this right way, but it works, and I am happy to avoid acpid/xss-lock/xautolock etc! Suggestions are welcome!

EDIT: oops! the script is alright but service is wrongly configured, as it will keep triggering slock every second, when lid is closed, needs some improvement.

EDIT2: using this script with conky, systemd-service file posted above fails after single execution of slock!

Last edited by Docbroke (2016-03-23 09:59:30)

jasonwryan · 2016-03-23 06:53:36

Spare the feline:

# LID=$(awk '{print $2}' /proc/acpi/button/lid/LID0/state)
LID=$(grep -c 'state:.*open' /proc/acpi/button/lid/LID0/state)

Simpler:

(( LID = 0)) && slock

Docbroke · 2016-03-23 07:26:21

yeh spared the feline !

however "(( LID = 0)) && slock" didn't work

EDIT: worked after changing operator to == as suggested in next post

Last edited by Docbroke (2016-03-23 10:02:28)

jasonwryan · 2016-03-23 07:34:51

My bad: the operator is ==.

Trilby · 2016-03-23 10:20:40

So you've learned of grep -c, but apparently not grep -q:

grep -q 'state:.*open' /proc/acpi/button/lid/LID0/state || slock

This would be a bit better with a different match and a && instead of || - is the alternative to .*open *closed? If so the following would be best:

grep -q 'state:.*closed' /proc/acpi/button/lid/LID0/state && slock

The reason being the first version with the || will run slock if grep fails for some unexpected reason like that file not existing or being accessible.

Alad · 2016-03-23 12:08:56

People hardcoding DISPLAY variables gets a bit old, at least for those who use multiple display servers. I use this:

#!/bin/bash

pid=$(pgrep -t tty$(fgconsole) xinit)
pid=$(pgrep -P $pid -n)

import_environment() {
    (( pid )) && for var; do
        IFS='=' read key val < <(egrep -z "$var" /proc/$pid/environ)

        printf -v "$key" %s "$val"
        [[ ${!key} ]] && export "$key"
    done
}

import_environment XAUTHORITY USER DISPLAY

xscreensaver-command -activate
xscreensaver-command -lock

Assumes you use xinit to start your WM. /usr/lib/systemd/system-sleep snippet:

#!/bin/bash
case $1/$2 in
	pre/*) xscreensaver-asroot ;;
esac

If you want it only to happen when you close the lid, use grep as above, or:

[[ $(awk '$2 ~ /closed/' /proc/acpi/button/lid/LID0/state) ]] && ...

Last edited by Alad (2016-03-23 12:32:38)

Awebb · 2016-03-23 12:15:56

Do I come from another dimension, or is the -q switch redundant in this instance? If I'm not still with a fever from that damn flue, grep returns true on a find and false on no finds and/or errors.

respiranto · 2016-03-23 13:43:19

Awebb wrote:

Do I come from another dimension, or is the -q switch redundant in this instance? If I'm not still with a fever from that damn flue, grep returns true on a find and false on no finds and/or errors.

grep without the -q switch would also print the matching line(s).

Earnestly · 2016-03-23 13:50:26

read -r _ state < /proc/acpi/button/lid/LID0/state

case $state in
    ...
esac

Why overcomplicate everything?

Edit: Although just using grep's exit status is better if that's all you need

Last edited by Earnestly (2016-03-23 13:54:19)

Docbroke · 2016-03-23 13:51:45

@Trilby, thanks for "grep -q" idea, and yeh, closed is the another alternnative scenario for lid.

Spider.007 · 2016-04-10 12:33:00

karol wrote:

Have a look at expac.

Have a look at the title of this topic

Anyway, I just wrote a simple wrapper for applications that don't support multi-threading. This example encodes flac to aac, but it can really be used for anything.

#!/bin/bash
set -e; cd `dirname $0`
MAXTHREADS=6

t=()
while read -d '' p
do
	mkdir -p "aac.tmp/${p%/*}"
	flac -dc "$p" | fdkaac - -o"aac.tmp/$p" & t=(${t[*]} $!)

	[[ ${#t[*]} -lt $MAXTHREADS ]] && continue

	wait ${t[0]} && unset t[0]

done < <(find flac/ -type f -name \*.flac -print0)

# wait for running threads
while [[ ${#t[*]} -gt 0 ]]; do wait ${t[0]} && unset t[0]; done

It uses an array, and keeps the # of threads consistent by waiting for the first thread when the maximum # is reached. Works best when all sub-processes take roughly the same time

Last edited by Spider.007 (2016-04-10 12:38:24)

jasonwryan · 2016-04-30 23:07:20

#!/usr/bin/env bash
# Play subtitles for a film if they exist

movie="$1"
mdir="${movie%/*}"
name="${movie##*/}"

cd "$mdir"
for file in *; do
  if [[ ${file%.*} == ${name%.*} ]]; then
    title="${file%.*}"
    for match in "$title"*; do
      if [[ $match =~ @*.(ass|srt|sub) ]]; then
        subtitles="$match"
      fi
    done
  fi
done

if [[ -n $subtitles ]]; then
  mpv --subfile="$subtitles" "$name"
else
  printf "%s\n" "No subs found, playing film anyway..."
  mpv "$name"
fi

# vim:set sw=2 ts=2 et:

Prompted by this: http://unix.stackexchange.com/questions … nfig-files

Earnestly · 2016-05-01 22:31:12

...

# Quotes not necessary here
movie="$1"
mdir="${movie%/*}"
name="${movie##*/}"

...

# It is a bit anal but naked globs should have ./ prefixed, i.e. for a in ./*
# See <http://www.dwheeler.com/essays/filenames-in-shell.html>
# Edit: Also consider using nullglob if you're using bash.
for file in *; do

  # The RHS of the if statement needs to be quoted.
  # See <http://mywiki.wooledge.org/Quotes#When_Should_You_Quote.3F>
  if [[ ${file%.*} == ${name%.*} ]]; then

    # Unnecessary quoting here
    title="${file%.*}"

        # And here
        subtitles="$match"

# No need for -n here
if [[ -n $subtitles ]]; then

...

Last edited by Earnestly (2016-05-01 22:36:27)

Arch Linux

#2726 2016-03-17 23:53:00

Re: Post your handy self made command line utilities

#2727 2016-03-18 12:46:31

Re: Post your handy self made command line utilities

#2728 2016-03-20 03:51:53

Re: Post your handy self made command line utilities

#2729 2016-03-20 10:31:35

Re: Post your handy self made command line utilities

#2730 2016-03-20 11:10:49

Re: Post your handy self made command line utilities

#2731 2016-03-20 11:36:26

Re: Post your handy self made command line utilities

#2732 2016-03-20 11:58:26

Re: Post your handy self made command line utilities

#2733 2016-03-20 12:30:14

Re: Post your handy self made command line utilities

#2734 2016-03-20 15:52:10

Re: Post your handy self made command line utilities

#2735 2016-03-20 15:57:23

Re: Post your handy self made command line utilities

#2736 2016-03-22 17:10:52

Re: Post your handy self made command line utilities

#2737 2016-03-22 23:00:32

Re: Post your handy self made command line utilities

#2738 2016-03-23 06:44:03

Re: Post your handy self made command line utilities

#2739 2016-03-23 06:53:36

Re: Post your handy self made command line utilities

#2740 2016-03-23 07:26:21

Re: Post your handy self made command line utilities

#2741 2016-03-23 07:34:51

Re: Post your handy self made command line utilities

#2742 2016-03-23 10:20:40

Re: Post your handy self made command line utilities

#2743 2016-03-23 12:08:56

Re: Post your handy self made command line utilities

#2744 2016-03-23 12:15:56

Re: Post your handy self made command line utilities

#2745 2016-03-23 13:43:19

Re: Post your handy self made command line utilities

#2746 2016-03-23 13:50:26

Re: Post your handy self made command line utilities

#2747 2016-03-23 13:51:45

Re: Post your handy self made command line utilities

#2748 2016-04-10 12:33:00

Re: Post your handy self made command line utilities

#2749 2016-04-30 23:07:20

Re: Post your handy self made command line utilities

#2750 2016-05-01 22:31:12

Re: Post your handy self made command line utilities

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