Post your handy self made command line utilities

Trilby · 2013-08-11 02:37:00

I guess not - just another option. A link just seemed simpler than parsing the file, but no real difference.

jasonwryan · 2013-08-11 02:41:01

It probably is (simpler); I just hadn't thought of it...

Awebb · 2013-08-11 10:22:46

I just have one static wallpaper "file" with no name extention. It's just called "wallpaper" and is a symlink to whatever wallpaper I currently use. This link is used by the background setter, the screensaver and i3-lock. The moment you add another program, that calls this file, the less complicated it gets with a symlink. In your case, however, the only reason to prefer a symlink is, that anything, that changes a "critical" file like .xinitrc might corrupt that file in some edge cases.

But I think Trilby meant, that all that sed and awk is not very elegant here and that the symlink approach could solve this in half the lines. :-)

EDIT: Okay, I'm late to the show. Nevermind then.

Last edited by Awebb (2013-08-11 10:23:57)

Earnestly · 2013-08-11 16:17:52

display -window root -size 0000x000 ~/.local/share/wall

Can even handle .webp formats.
I find it hard to believe anyone doesn't have imagemagick or graphicsmagick installed.

karol · 2013-08-11 16:23:18

Kaustic wrote:

I find it hard to believe anyone doesn't have imagemagick or graphicsmagick installed.

https://www.archlinux.de/?page=PackageStatistics (the page is a bit big, may load a while)
* imagemagick 85.99 %
* graphicsmagick 22.67 %

HalosGhost · 2013-08-11 16:55:50

Kaustic wrote:

display -window root -size 0000x000 ~/.local/share/wall

I'm actually rather interested in using this option to display my wallpaper instead of `feh` as I, also, am trying to switch over to sxiv. However, I'm having some trouble with that -size argument. It doesn't seem to be correctly sizing the image. Instead, the image is scaled so that the height fits which then repeats the image as tiles. The argument to size is meant to be the pixel counts (width and height) for which the image should be displayed, right?

All the best,

-HG

Earnestly · 2013-08-11 17:18:44

karol wrote:

Kaustic wrote:
I find it hard to believe anyone doesn't have imagemagick or graphicsmagick installed.
https://www.archlinux.de/?page=PackageStatistics (the page is a bit big, may load a while)
* imagemagick 85.99 %
* graphicsmagick 22.67 %

Those statistics are far from true or accurate or even up to date. They're fun though

HalosGhost wrote:

The argument to size is meant to be the pixel counts (width and height) for which the image should be displayed, right?

The -size parameter is usually given when the size of an image isn't known (RAW) or to override the information in the image header. It's mostly unnecessary in this case as display automatically scales the image to fit the root window's dimensions.

Last edited by Earnestly (2013-08-11 17:21:30)

HalosGhost · 2013-08-11 17:22:31

Kaustic wrote:

The -size parameter is usually given when the size of an image isn't known or to override the information in the image header. It's mostly unnecessary in this case as display automatically scales the image to fit the root window's dimensions.

But, it appears to fit the image to the height of the window, not the width, correct? Is there a way to reverse this?

All the best,

-HG

Trilby · 2013-08-11 17:32:32

I've never used `display`, but most other imagemagick tools will preserve the aspect ratio while scaling (by default), so the smaller scale axis is used for both. Usually a '!' after the size will scale to the exact size ignoring aspect ratio. Otherwise, if you don't mind the top/bottom being cut off, you can just put a very large height and set the width to your screen width. Then the image will be scaled (vertically and horizontally) with a scale factor to fit the width to the screen.

Earnestly · 2013-08-11 18:11:29

I'm not sure, try asking on ##imagemagick on freenode or reading the documentation. I would be surprised if it couldn't.
Edit: Ahh, Trilby has already provided an idea. -gravity center may work but I haven't tested.

/me still has to learn a lot about the power of imagemagick.

Last edited by Earnestly (2013-08-11 18:17:01)

jefdaj · 2013-08-13 21:24:17

Slight modification of dmenu_run that pipes the output through xargs:

#!/bin/sh
# usage: dmenu_xargs <command> <dmenu_run args>

cmd="$1"; shift 1

cachedir=${XDG_CACHE_HOME:-"$HOME/.cache"}
if [ -d "$cachedir" ]; then
  cache=$cachedir/dmenu_xargs
else
  cache=$HOME/.dmenu_cache
fi

( IFS=:
  if stest -dqr -n "$cache" $PATH; then
    stest -flx $PATH | sort -u | tee "$cache" | dmenu -p "$cmd" "$@"
  else
    dmenu -p "$cmd" "$@" < "$cache"
  fi
) | xargs -0 $cmd

It also defaults to using the command as the prompt name. I use it with i3 to have a variety of prompts in addition to regular dmenu_run:

# ~/.config/i3/config

# dmenu prompts
bindsym $mod+r dmenu_run
bindsym $mod+n dmenu_xargs i3-rename
bindsym $mod+b dmenu_xargs xbacklight

etc.

EDIT: Oh, and i3-rename is this:

#!/bin/bash
i3-msg "rename workspace to \"$@\""

Last edited by jefdaj (2013-08-13 21:25:46)

windows_me · 2013-08-14 11:33:55

If you use PowerDNS as your nameserver, then this script provides an easy way to manage dynamic DNS:
https://github.com/battlesnake/ddns
Includes a hacky web interface to manage your dynamic DNS remotely (and of course, for updating the dynamic IP address via a curl command!)

If you access your home PC a lot from work/other external networks, but don't want to run up an energy bill, then turn a Raspberry Pi into a wake-on-lan proxy:
https://github.com/battlesnake/macs
(note: via cron job, also maintains a list of machines detected on your network, with IP/hostname/MAC address, so you don't have to remember your PC's MAC address)

Last edited by windows_me (2013-08-14 11:34:57)

wstewart90 · 2013-08-14 17:49:31

Just a handy vnc script I wrote to deal with the whole xauth thing.

#!/usr/bin/bash
# Run this command as root
CURRENTUSER=$(ps -u|sed -n 2p|awk '{print $1}')

if [ "$CURRENTUSER" == "root" ]; then
X11AUTH=$(ps x|grep X|awk '{print $14}')
echo $X11AUTH
x11vnc -forever -rfbport $1 -display :0 -auth $X11AUTH
else
echo "You must be root to run this command"
fi

Edit: You may need to edit the awk like depending on your display manager. kdm has it in the 14th column but gdm-old has it in column 10. Also thanks for the $USER and $UID tip.

Last edited by wstewart90 (2013-08-15 06:05:06)

Thaodan · 2013-08-14 17:54:36

you can use $USER or better $UID to detect if you're not root

x33a · 2013-08-14 17:57:29

or whoami

apoulos · 2013-08-14 21:15:44

After getting frustrated trying to find a TV episode downloader, I hacked together the following script. Anyone know of something similar?

#!/bin/bash

# Script to automatically scrape the kickass.to rss feed for tv episodes.
# Place episode configuration files with a .dl extension in same directory.
# Sample .dl file is shown below.  Script will source the .dl files one by one,
# and search for the episode by the variable URI. Results are filtered by
# variable MINSEEDS, and sorted to accept only the highest seeded match. If
# found, magnet is posted to transmission, and the EPISODE number in the .dl
# file is incremented.
#
# Dependencies: Script uses "transmission-cli", "curl", "xmlstarlet" for command "xml"
# Todo: season increment logic, download .torrent file to a "watch" directory
# 
# Example:
# Search for "burn notice 720p s07e10"
# file: burnNotice.dl
# ##################
# SEASON=7
# EPISODE=10
# SEASON0=`printf "%0*d" 2 ${SEASON}`
# EPISODE0=`printf "%0*d" 2 ${EPISODE}`
# URI="http://kickass.to/usearch/burn%20notice%20720p%20s${SEASON0}e${EPISODE0}/?rss=1"
# ##################

# authentication for transmission-remote
AUTH=user:password
# filter torrents with less than MINSEEDS
MINSEEDS=2

FILES=*.dl
for file in $FILES
do
	. $file
	echo curling rss feed of $file for s${SEASON0}e${EPISODE0}
	# xml command sorts descending on torrent:seeds where torrent:seeds >= $MINSEEDS
	MAGNET=$(curl --connect-timeout 2 -s "$URI" | xml sel -T -t -m /rss/channel/item -s D:N:- torrent:seeds -i "torrent:seeds>=$MINSEEDS" -v torrent:magnetURI 2>/dev/null)
	if [ "$MAGNET" != "" ]; then
		echo adding magnet to transmission...
		transmission-remote -n $AUTH -a "$MAGNET"
		if [ "$?" == "0" ]; then
			echo incrementing episode number
			SEDEX="s/^EPISODE=$EPISODE$/EPISODE=$(($EPISODE+1))/"
			sed "$SEDEX" -i $file
		else
			echo failed to submit magnet
		fi
	else
		echo failed to get magnet
	fi
	# give rss server a break
	sleep 1
done

Thaodan · 2013-08-14 21:17:53

x33a wrote:

or whoami

using a var is faster than calling an external command, but if you using a posix shell than this would be what I do.

Here my function to calculate on shell:

rechner() {
        echo "$@" | bc -l
}

karol · 2013-08-14 21:26:05

Thaodan wrote:

Here my function to calculate on shell:
rechner() {
        echo "$@" | bc -l
}

I suggest using e.g.

echo "scale=3;$@" | bc -l

for your ordinary calculations, like '20/7'.

Thaodan · 2013-08-15 00:21:36

karol wrote:

Thaodan wrote:
Here my function to calculate on shell:
rechner() {
        echo "$@" | bc -l
}
I suggest using e.g.
echo "scale=3;$@" | bc -l
for your ordinary calculations, like '20/7'.

Thanks I extended it a bit:

rechner() {
        local arg scale=3 ;
        while getopts s: arg ; do 
                case $arg in
                        s) scale=$OPTARG;
                esac
        done
        shift $((OPTIND-1))
        echo "scale=$scale;$@" | bc -l 
}

defer · 2013-08-15 16:11:31

repeat.sh - Repeat command $x times after $y interval

if [[ "$1" =~ ^[0-9]+$ ]] && [[ "$2" =~ ^[0-9]+$ ]]; then	
	max=$1
	count=$2
	shift
	shift
	for ((i=1; i <= max ; i++)); do
		sleep $count
		eval "$@"
	done
else
	echo "Usage: $0 [count] [interval] command"
fi

lolilolicon · 2013-08-15 16:27:10

defer wrote:

		eval "$@"

Don't do eval, not here. Simply "$@". Hint: repeat.sh 2 0 echo '$(:)'

windows_me · 2013-08-27 15:57:33

python -m http.server <port>

shares the current directory via HTTP over a certain port. Ctrl+C to stop sharing.

To make this nicer, try the following:

echo 'python -m http.server $1' | sudo tee /usr/bin/share && sudo chmod +x /usr/bin/share

Then to share a folder temporarily, just use:

share <port>

Ctrl+C is still of course used to stop the server.

To run the server in the background, use

share <port> &

Then to stop it, use your favourite syntax of the kill command.

Note that you need root permission to use a port less than 1024.

Last edited by windows_me (2013-08-27 15:58:09)

teckk · 2013-08-28 22:46:56

If anyone can use this.
A couple of scripts that I wrote for Google text to speech, and Google text to text translation.
They work from shell and allow you to translate until you quit.
The text to speech script concatenates to $FILE.mp3 so you can make a single file out of 100 char max. segments. The text to text dumps the output to sdout, redirect to $FILE if you want.
You might want to take it easy on how many times a minute you hit their server.

Text to text

#! /usr/bin/env bash

# Translate text using google. No google account needed.
# Requires curl, awk, iconv, html2text
# Language are:
# af ar az be bn bg bs ca cub zh-CN zh-TW cs cy da de en en_us en_gb en_au 
# el es et eu fa fi fr ga gl gu ht hi hmn hr hu hy is id it iw ja jw ka km 
# kn ko la lv lt mk mr ms mt no nl pl pt ro ru sr sk sl sq sw sv ta te th tl 
# tr uk ur vi yi

clear
OPTIONS="Input_Lang Output_Lang Enter_Text Translate Quit"
echo "Press Enter at any time to return to menu."
echo "Select an option:"
select opt in $OPTIONS; do

if [ "$opt" = "Quit" ]; then
clear
exit

elif [ "$opt" = "Input_Lang" ]; then
echo "Language options are:"
echo "en de fr es it" # Add languages here.
echo "What input language"
read ILAN

elif [ "$opt" = "Output_Lang" ]; then
echo "Language options are:"
echo "en de fr es it" # Add languages here.
echo "What ouput language"
read OLAN

elif [ "$opt" = "Enter_Text" ]; then
echo "Enter text"
read TEXT

elif [ "$opt" = "Translate" ]; then

result=$(curl -s -i --user-agent "" -d "sl=$ILAN" -d "tl=$OLAN" --data-urlencode "text=$TEXT" http://translate.google.com)
encoding=$(awk '/Content-Type: .* charset=/ {sub(/^.*charset=["'\'']?/,""); sub(/[ "'\''].*$/,""); print}' <<<"$result")

iconv -f $encoding <<<"$result" |  awk 'BEGIN {RS="</div>"};/<span[^>]* id=["'\'']?result_box["'\'']?/' | html2text

else
echo "Bad option"
fi; done

Text to voice

#! /usr/bin/env bash

# Text to speech conversion using google text to voice. No google account needed.
# Requires wget
# 100 char. max. Output to "$NAME.mp3"
# Language are:
# af ar az be bn bg bs ca cub zh-CN zh-TW cs cy da de en en_us en_gb en_au 
# el es et eu fa fi fr ga gl gu ht hi hmn hr hu hy is id it iw ja jw ka km 
# kn ko la lv lt mk mr ms mt no nl pl pt ro ru sr sk sl sq sw sv ta te th tl 
# tr uk ur vi yi

clear
OPTIONS="Language Enter_Text Filename Translate Quit"
echo "Press Enter at any time to return to menu."
echo "Select an option:"
select opt in $OPTIONS; do

if [ "$opt" = "Quit" ]; then
clear
exit

elif [ "$opt" = "Language" ]; then
echo "Language options are:"
echo "en de fr es it" # Add languages here.
echo "What Language?"
read LNG

elif [ "$opt" = "Enter_Text" ]; then
echo "Enter text to translate to voice"
read WORDS

elif [ "$opt" = "Filename" ]; then
echo "Output file name?"
read NAME

elif [ "$opt" = "Translate" ]; then
URL="http://translate.google.com/translate_tts?tl=${LNG}&q="
wget -q -U Mozilla -O - "$URL""$WORDS" >> "$NAME".mp3

else
echo "Bad option"
fi; done

Pascal C.Plusplus · 2013-08-30 12:56:03

inspired from this but with bookmarks in a text file :

mark() {
	echo "$1|$(pwd)" >> $HOME/.marks
}

unmark() {
	sed "/^$1|/d" $HOME/.marks -i
}

jump() {
	dir=$(grep $1 $HOME/.marks)
	dir=${dir/*|/}
	cd $dir
}

# this is for zsh :

function _completemarks {
	reply=($(sed 's/\(.*\)|.*/\1/' $HOME/.marks))
}

compctl -K _completemarks cdm
compctl -K _completemarks delmark

x33a · 2013-09-01 17:15:28

A simple wrapper for the surf browser, which removes the cookies.txt file (where surf stores its cookies) when surf exits.

#!/usr/bin/env bash

# start surf
/usr/bin/surf "$@"

# get pid
surf_running=$(pidof surf)

# if surf is not running, remove the cookies file
if [[ -z $surf_running ]]; then
    /usr/bin/rm "$HOME"/.surf/cookies.txt
    /usr/bin/rm -rf "$HOME"/.local/share/webkit
fi

Edit: Added the webkit directory. It has the localstorage crap and other unneeded stuff.

Last edited by x33a (2013-09-18 18:05:44)

Arch Linux

#2176 2013-08-11 02:37:00

Re: Post your handy self made command line utilities

#2177 2013-08-11 02:41:01

Re: Post your handy self made command line utilities

#2178 2013-08-11 10:22:46

Re: Post your handy self made command line utilities

#2179 2013-08-11 16:17:52

Re: Post your handy self made command line utilities

#2180 2013-08-11 16:23:18

Re: Post your handy self made command line utilities

#2181 2013-08-11 16:55:50

Re: Post your handy self made command line utilities

#2182 2013-08-11 17:18:44

Re: Post your handy self made command line utilities

#2183 2013-08-11 17:22:31

Re: Post your handy self made command line utilities

#2184 2013-08-11 17:32:32

Re: Post your handy self made command line utilities

#2185 2013-08-11 18:11:29

Re: Post your handy self made command line utilities

#2186 2013-08-13 21:24:17

Re: Post your handy self made command line utilities

#2187 2013-08-14 11:33:55

Re: Post your handy self made command line utilities

#2188 2013-08-14 17:49:31

Re: Post your handy self made command line utilities

#2189 2013-08-14 17:54:36

Re: Post your handy self made command line utilities

#2190 2013-08-14 17:57:29

Re: Post your handy self made command line utilities

#2191 2013-08-14 21:15:44

Re: Post your handy self made command line utilities

#2192 2013-08-14 21:17:53

Re: Post your handy self made command line utilities

#2193 2013-08-14 21:26:05

Re: Post your handy self made command line utilities

#2194 2013-08-15 00:21:36

Re: Post your handy self made command line utilities

#2195 2013-08-15 16:11:31

Re: Post your handy self made command line utilities

#2196 2013-08-15 16:27:10

Re: Post your handy self made command line utilities

#2197 2013-08-27 15:57:33

Re: Post your handy self made command line utilities

#2198 2013-08-28 22:46:56

Re: Post your handy self made command line utilities

#2199 2013-08-30 12:56:03

Re: Post your handy self made command line utilities

#2200 2013-09-01 17:15:28

Re: Post your handy self made command line utilities

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