need some shell scripting help

like100ninjas · 12-16-2015, 03:51 AM

stop with the cussing and the getting angry. just go bother another thread. did you have questions here, or are you just here to troll? just go away.

edit: you can't make the script work. you're pasting from manpages with no idea what the actual problem is. you came here in the first place to start a flamewar and troll. just GO. AWAY. you're not answering my question or helping me understand anything. your only intention is to try and belittle me while offering nothing constructive. just don't reply again. find something else to occupy your time.

fu9ar · 12-16-2015, 02:23 PM

Calm down, sparky. First off, those aren't manpages. Those lines of output are from help read, which are not man pages. man pages are man pages.

Secondly: What? You came to the internet and expected someone to just fix a poorly written, uncommented, broken desktop rice script for you?

Finally: I'm teaching you something critical to the practice of programming, if you would pull your head from your behind long enough to learn it.

joe_2000 · 12-17-2015, 04:35 PM

Let's get back to topic.

In your while condition you are doing this:

Code:

$( read -r line )

Now, look at the following tests:

Code:

$ read -r line
bla bla
$ echo $line
bla bla
$ foobar=$( read -r line_2 )
bla blubb
$ echo $foobar

$ echo $line_2

$

So, as you correctly suggested, the read command happens in a subshell, and the assigned value of the line variable will never become available in your script.
On top of that, the read command does not write anything to stdout, so the $() returns an empty string. Hence, the length of the string (-n test) will never be non-zero, and your condition will never be true.

What you need to do is e.g. this:

Code:

read -r line
while [[ -n $line ]] {
    echo "You typed: "$line
    # do stuff
    read -r line

}

(I am sure it can be done in a more elegant way, but you get the point)

BW-userx · 12-18-2015, 09:17 AM

Quote:

Originally Posted by like100ninjas

edit: once again, trying to make this lemonbar script work. i fixed all the error messages, and the script runs. i think my problem might be that i'm testing `read -r line' in a subshell, so the script never really parses the lines i'm trying to read. just a hunch. anyone know how to fix this? or maybe something else is wrong.

edit again: i keep trying different things but no text shows up on the bar still. i've tried adding "print $line" underneath the while line and nothing shows up.

$HOME/etc/lemonbar/panel_bar

Code:

#!/usr/bin/zsh

off of another place on netland -> and lemonBar -> example

Code:

#!/usr/bin/bash

# Define the clock
Clock() {
        DATE=$(date "+a b %d, %T")

        echo -n "$DATE"
}

# Print the clock

while true; do
        echo "%{c}%{Fyellow}%{Bblue} $(Clock)%{F-}"
        sleep 1;
done

Pont is: it is using BASH too

I use i3Status (bar) myself

though that seems rather simple, have you tried typing it all out right, if it is the error that states it is near } -- usally means you might have something within that file that is tossing an error, as I seen no missing quote marks in the code.

you could try a fresh sheet of Epaper and write it out again or just saveAs over top of it, the same file, as well. to clean it up and seee if it might have been something within the file itself.

ot try a different info bar -- or just format and install fresh OS (just playing)

zsh, don't know but most likely it is a typo error missing something one of them really stupid formatting errors like a quote or a space missing or is there that is not suppose to be