Handy command-line stuff for terminals or scripts

Sector11 · 2020-11-02 20:47:11

Notice my little script does NOT use "pkill -9".

If running shut it down
If not running, start it up smile

sleekmason · 2020-11-03 01:33:15

*Ouch! Just saw where I may have inferred such inadvertently. Changed to reflect the ld-hotcorners script;)

vasa1 · 2020-11-03 07:03:46

Sector11 wrote:

...
I also have a SSC.sh file to Start|Stop Conky, various ones, that might help you, adapt it for your need:
#!/bin/bash
## Original idea by: GrouchyGaijin
## This idea by: Stinkeye - Jan 2013
## With another tweak by: arclance
## Final tweak by: Sector11
## click to start, click to stop

if pgrep -f "conky -q -c /media/5/Conky/easysid/MechClock/conkyrc_clock"
then
	pkill -xf "conky -q -c /media/5/Conky/easysid/MechClock/conkyrc_clock"
else
	conky -q -c "/media/5/Conky/easysid/MechClock/conkyrc_clock"
fi
It checks to see if the conky is running:
if yes - it kills it
if no - it starts it
Worth a try.
Remember the part inside the " " are the exact command to run the program.

Looks like the "pgrep" bit can be left out:

#!/bin/bash

pkill -xf "conky -c /path/to/conky" || conky -c "/path/to/conky"

ohnonot · 2020-11-06 22:08:11

sleekmason wrote:

What does the -9 do?

http://turnoff.us/image/en/dont-sigkill.png

sleekmason · 2020-11-07 02:27:50

ohnonot wrote:

sleekmason wrote:
What does the -9 do?
http://turnoff.us/image/en/dont-sigkill.png

Ha! This is good:)

sleekmason · 2020-12-11 18:30:27

Made this bit to find which window manager to display in Conky.

wmctrl -m | head -n1 | cut -d" " -f2

rbh · 2020-12-11 20:37:05

How do you manage the need to run as root or with sudo, when in conky?

ohnonot · 2020-12-11 21:17:02

rbh wrote:

How do you manage the need to run as root or with sudo, when in conky?

It comes down to being able to execute commands with superuser privileges without the need of entering a password (interactively).
Several approaches exist: with PAM I guess, or with adding certain commands to your sudoers config files under /etc.
For the latter, see: https://wiki.archlinux.org/index.php/Su … le_entries

ohnonot · 2021-02-15 07:18:53

I was playing around with using conky to display a visual notification from a shell script.
Conky can read config files from stdin! That opens a lot of possibilities...
Proof of concept: find your mouse cursor - displays a red square around your pointer for 2 seconds. Requires xdotool.

#!/bin/sh

showtime=2 # seconds
eval $(xdotool getmouselocation --shell)

cat <<EOF | conky -c - & conkypid=$!
conky.config = {
own_window = true,
own_window_transparent = false,
own_window_colour = '#ff0000',
own_window_hints = 'undecorated,skip_taskbar,skip_pager,sticky',
update_interval = 1,
double_buffer = true,
minimum_width = 20,
minimum_height = 20,
maximum_width = 20,
alignment = 'top_left',
gap_x = $X,
gap_y = $Y,
draw_borders = true,
draw_outline = false,
draw_shades = false,
border_width = 4,
border_outer_margin = 2,
default_color = '#ffffff',
};
conky.text = [[]];
EOF

# total_run_times is unreliable, therefore:
sleep "$showtime"
kill $conkypid

johnraff · 2021-02-15 09:18:36

ohnonot wrote:

I was playing around with using conky to display a visual notification from a shell script.
Conky can read config files from stdin! That opens a lot of possibilities...

Nice find!

---
Other topic:
sh -c '...some code...'
is sometimes useful when you want to run a snippet of shell code from a menu item, Thunar custom action or tint2 or any other situation that doesn't support shell syntax. sh (or bash if you need the extra features) is the command to run, and everything after the -c is just a parameter, so the launcher doesn't have to interpret it at all, just send it to the shell. It's highly advisable to wrap that shell code in single quotes so it won't be touched by anything else.

But this is already well known. Possibly slightly less well known is that you can pass positional parameters to that code snippet, just as if it was a function or separate script in a file.

Try this in a terminal:

sh -c 'echo "First: $1, Second: $2"' _ one two

Just a minute, what's that _ doing? That gets passed as $0, which usually means the shell name or script name. Here it's a placeholder (still accessible as $0) that gets used in error messages:

sh -c  'ecko "First: $1, Second: $2"' mycode one two

So sometimes there is value in using a meaningful string in the zeroth place, but usually _ is enough.

More reading:
https://superuser.com/questions/1526229 … ll-code-sh

#176 2020-11-02 20:47:11

Re: Handy command-line stuff for terminals or scripts

#177 2020-11-03 01:33:15

Re: Handy command-line stuff for terminals or scripts

#178 2020-11-03 07:03:46

Re: Handy command-line stuff for terminals or scripts

#179 2020-11-06 22:08:11

Re: Handy command-line stuff for terminals or scripts

#180 2020-11-07 02:27:50

Re: Handy command-line stuff for terminals or scripts

#181 2020-12-11 18:30:27

Re: Handy command-line stuff for terminals or scripts

#182 2020-12-11 20:37:05

Re: Handy command-line stuff for terminals or scripts

#183 2020-12-11 21:17:02

Re: Handy command-line stuff for terminals or scripts

#184 2021-02-15 07:18:53

Re: Handy command-line stuff for terminals or scripts

#185 2021-02-15 09:18:36

Re: Handy command-line stuff for terminals or scripts

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