ocv.me

MonkderVierte , 3 hours ago (edited 2 hours ago) to linux in Unix oneliners (mostly unorganized collection of bash oneliners)

Oneliner functions count too, right?

<span style="color:#323232;">binexist() {
</span><span style="color:#323232;">	##: lookup input in PATH, returns bool true/false
</span><span style="color:#323232;">#	IFS=:; find $PATH -executable -name "$1" 2>/dev/null |grep -q "/$1$" # slower
</span><span style="color:#323232;">	command -v "$1" >/dev/null 2>&1
</span><span style="color:#323232;">}
</span><span style="color:#323232;">contains() {
</span><span style="color:#323232;">	##: finds term in string, returns true/false
</span><span style="color:#323232;">	##: $ contains <search term> <string>
</span><span style="color:#323232;">	case "$1" in *${2}*) return 0;; *) return 1;; esac
</span><span style="color:#323232;">}
</span><span style="color:#323232;">
</span><span style="color:#323232;">error() {
</span><span style="color:#323232;">       ##: complain to STDERR and exit if given code 
</span><span style="color:#323232;">        printf '%sn' "$1" >&2; [ -n "$2" ] && exit "$2"
</span><span style="color:#323232;">}
</span><span style="color:#323232;">
</span><span style="color:#323232;">random() {
</span><span style="color:#323232;">	##: generate random number of <input> length
</span><span style="color:#323232;">	test "$1" -gt 1 && shuf -i 0-9 -n"$1" |tr -d 'n'
</span><span style="color:#323232;">}
</span><span style="color:#323232;">
</span><span style="color:#323232;">nfoview() {
</span><span style="color:#323232;">	##: view nfo files like intended
</span><span style="color:#323232;">	iconv -f CP866 <"$1" |less
</span><span style="color:#323232;">}
</span><span style="color:#323232;">
</span><span style="color:#323232;">mod_preset() {
</span><span style="color:#323232;">	##: print a nicely formatted preset of module options
</span><span style="color:#323232;">	modinfo -p "$1" |awk 
</span><span style="color:#323232;">		-F':' 
</span><span style="color:#323232;">		-v 'module="$1"' 
</span><span style="color:#323232;">		'{first=$1; $1="";print "n#"$0"n#options module "first"="}'
</span><span style="color:#323232;">}
</span><span style="color:#323232;">
</span><span style="color:#323232;">dpv() {
</span><span style="color:#323232;">	##: flash image to stick with progress bar, workaround for pv's flash bug #oflag=direct is fastest
</span><span style="color:#323232;">	##: https://askubuntu.com/questions/901481/writing-to-disk-using-pv-seems-to-be-fast-at-first-and-slow-at-the-end/961659#961659
</span><span style="color:#323232;">	pv "$1" |pkexec dd of="$2" bs=4M oflag=direct iflag=fullblock
</span><span style="color:#323232;">}
</span>

Not oneliners but still something i want to show off:

<span style="color:#323232;">functions() {
</span><span style="color:#323232;">	##: prints code of function files
</span><span style="color:#323232;">	function_s="$(sed '/^$/d;/##[^:]/d' "$SHELL_HOME"/functions)"
</span><span style="color:#323232;">	if [ -n "$1" ]
</span><span style="color:#323232;">		then echo "$function_s" |sed -n -e "/$1.*{/,/^}/ p" |highlight --line-numbers -qs candy --out-format=xterm256 --syntax=sh --stdout
</span><span style="color:#323232;">		else echo "$function_s" |highlight -qs candy --out-format=xterm256 --syntax=sh --stdout
</span><span style="color:#323232;">	fi
</span><span style="color:#323232;">}
</span><span style="color:#323232;">
</span><span style="color:#323232;">readconf() {
</span><span style="color:#323232;">	##: reads parameters from $config
</span><span style="color:#323232;">	##: format: readconf <parameter> <replacement> where replacement get's used if parameter is empty
</span><span style="color:#323232;">	var="$(grep "${1}=" "$config" |grep -Ev "^#|^$" |cut -d'=' -f2- |tr -d '"')"
</span><span style="color:#323232;">	if [ -z "$var" ]; then
</span><span style="color:#323232;">		var="$2"
</span><span style="color:#323232;">	fi
</span><span style="color:#323232;">	echo "$var"
</span><span style="color:#323232;">}
</span>

The readconf function is used like this:

<span style="color:#323232;">config content:
</span><span style="color:#323232;"># this a comment
</span><span style="color:#323232;">apple=red
</span><span style="color:#323232;">banana=yellow # this too
</span><span style="color:#323232;">
</span><span style="color:#323232;">config=/path/to/config.conf
</span><span style="color:#323232;">$ color_apple="$(readconf apple green)"
</span><span style="color:#323232;">$ color_banan="$(readconf banana)"
</span>

And the ‘functions’ function looks like this:

https://lemmy.ml/pictrs/image/3e6debf2-0e52-4ae3-aada-4ea3a13be245.png

Blaze , 4 hours ago to linux in Unix oneliners (mostly unorganized collection of bash oneliners)

Thanks, crossposted to !linux

thingsiplay , 6 hours ago to linux in Unix oneliners (mostly unorganized collection of bash oneliners)

I love such collections. But calling this one a one-liner is a bit of stretch:

`stty -icanon || stty -f /dev/stdin -icanon && perl -e ‘use strict; use Time::HiRes qw(usleep gettimeofday); use IO::Select; my $sel=IO::Select->new(); $sel->add(STDIN); my ($ts,$on,$t0,$td)=(0)x4; print “n”; while (1){ my $k=0; if($sel->can_read(.02)) {sysread(STDIN,$k,1)} my $t=int(gettimeofday100)/100; if($k eq “n”) {$on=0;$ts=0} $td=($ts+$t-$t0); if($on){printf “

Dirk , 6 hours ago

This is just absurd and totally defines NOT as a one-liner in my book.

thingsiplay , 6 hours ago

Yeah, just because there is no newline character, does not make it a one liner. It does not even fit into one line and needs to be soft-broken into next line multiple times. And it includes a whole perl script. :D If anyone want to execute these complex lines, I would recommend to save as a script and let it autoformat to something readable.