Bash TUI type test
https://redd.it/1bw2jx1
@r_bash

Copy/backup directories inside multiple directories

I'm making a noscript to config my setup, It install some packages and copy my cloned .config/ and .bashrc to my home folder, originally this only happened with the current user where I had run the noscript, but then I wanted this to happen for all users' home folder (or for all users in home?), I was successful in copying the files and direc to all user homes with these commands:

echo /home/*/ | xargs -n 1 cp ~/dots/.bashrc
echo /home/*/ | xargs -n 1 cp ~/dots/.config/

But before the noscript does this, I want it to make a "backup" of current .config/ and bashrc off each created users, I thought something like this would work, but that's not the case:

#create .oldconfig/ for each user
echo /home/*/ | xargs -i mkdir {}.oldconfig/
#move the current .config/ and .bashrc From all user to each .oldconfig/ inside their home directory
echo /home/*/ | xargs -i mv # ... incomplete

I tried using this Xtendedargs instead of some loop, as it should be done in a single command (if it worked)

https://redd.it/1bx0s1q
@r_bash

Where Can I Find Well-Crafted Code?

I understand the importance of learning from bash noscripts written by others, but I want to avoid picking up bad habits or inefficient techniques.

Could anyone recommend a website or resource where I can find high-quality, real-world bash noscripts—not just examples?

Thanks for your help!

https://redd.it/1bx8mci
@r_bash

Getting information about a specific process using process id

How exactly would I go about achieving this in bash?

https://redd.it/1bx9n8a
@r_bash

A useful yet simple noscript to search simultaneously on mutliple Search Engines.

I was too lazy to create this noscript till today, but now that I have, I am sharing it with you.

I often have to search for groceries & electronics on different sites to compare where I can get the best deal, so I created this noscript which can search for a keyword on multiple websites.

# please give the noscript permissions to run before you try and run it by doing
$ chmod 700 noscriptname
#!/bin/bash

# Check if an argument is provided
if $# -eq 0 ; then
echo "Usage: $0 <keyword>"
exit 1
fi

keyword="$1"

firefox -new-tab "https://www.google.com/search?q=$keyword"
firefox -new-tab "https://www.bing.com/search?q=$keyword"
firefox -new-tab "https://duckduckgo.com/$keyword"

# a good way of finding where you should place the $keyboard variable is to just type some random word into the website you want to create the above syntax for and just go "haha" and after you search it, you replace the "haha" part by $keyword

This noscript will search for a keyword on Google, Bing and Duckduckgo. You can play around and create similar noscripts with custom websites, plus, if you add a shortcut to the Menu on Linux, you can easily seach from the menubar itself. So yeah, can be pretty useful!

Step 1: Save the bash noscript Step 2: Give the noscript execution permissions by doing chmod 700 noscript_name on terminal. Step 3: Open the terminal and ./noscriptname "keyword" (you must enclose the search query with "" if it exceeds more than one word)

After doing this firefox must have opened multiple tabs with search engines searching for the same keyword.

Now, if you want to search from the menu bar, here's a pictorial tutorial for that
Could not post videos, here's the full version: https://imgur.com/a/bfFIvSR


https://preview.redd.it/fbw7y9u4tusc1.png?width=717&format=png&auto=webp&s=bbc5b252419683f1ecf333fffbd389d9edfd16cd

&#x200B;

https://preview.redd.it/my994k3ktusc1.png?width=714&format=png&auto=webp&s=9e46fa2c059d56351edf965a7f159edf35cdee88

&#x200B;

copy this, !s basically is a unique identifier which tells the computer that you want to search. syntax for search would be: !s\[whitespace\keyword](https://preview.redd.it/j872qczktusc1.png?width=714&format=png&auto=webp&s=bce94396e4e03c9327de124eedf121b6c554628b)

If your search query exceeds one word use syntax: !s[whitespace]"keywords"

&#x200B;

https://preview.redd.it/j294497mtusc1.png?width=1667&format=png&auto=webp&s=a00d4340b7ad958fbdf577367170c07fcd36248f

https://redd.it/1bxamwp
@r_bash

A small app for coloring text

I didn't know if this was a good subreddit to submit this because it seems to be more focused on bash noscripting, but this app was made with bash noscript development in mind. If it doesn't belong here, please let me know.

&#x200B;

I made an app a few days ago that makes it easier to style text with ANSI escape codes called Gecko.

It uses a flavor of markup tags found in Spectre.Console. So if you wanted to change the color of text, you would simply use:

gecko "cyan1Hello, World!"

The tag to reset color is [/], and unlike Spectre.Console, can be used anywhere.

More information can be found at the GitHub repository: https://github.com/ScripturaOpus/ChameleonTerminal


I'm mostly looking for people to abuse this app so that I can find bugs, but also as a regular release for people to use.

Let me know if it can be useful and what else to add!

https://redd.it/1bxmcad
@r_bash

A noscript to rename folders

Hi! I have posted this : https://www.reddit.com/r/bash/comments/1bu34ld/a\_noscript\_to\_automatically\_rename\_music\_folders/?utm\_source=share&utm\_medium=web3x&utm\_name=web3xcss&utm\_term=1&utm\_content=share\_button

I want to rename all of the albums's folders of my music library like : Music/Artist/Album (YYYY)/ --> Music/Artist/YYYY_Album/

'YYYY' is the year of release year of the album.

I have now the following noscript :

#!/bin/bash

for dir in //;do
[[ $dir =~ (.)\ \(([:digit:]{4})\)/$ ]] &&
echo "${BASHREMATCH[0]}" "${BASHREMATCH2}${BASHREMATCH1% }/"
done#!/bin/bash

for dir in //;do
[[ $dir =~ (.)\ \(([:digit:]{4})\)/$ ]] &&
echo "${BASHREMATCH[0]}" "${BASHREMATCH2}${BASHREMATCH1% }/"
done

But it renames from : Music/Artist/Album (YYYY)/ to : Music/YYYY_Artist/Album/

What can I change to get the folders named like : Music/Artist/YYYY_Album/, i.e. YYYY_ to be set before the album's name and not before the artist's?

https://redd.it/1by4w09
@r_bash

Can you use GNU grep to check if a file is binary, in a fast and robust way?

In another thread, someone mentioned that neofetch is written in bash. I did not know that, so I made a small noscript to check what interpreters are being used by the executable files in my `$PATH`.
The main problem is testing if the file is text or binary. I found this 10-year-old discussion on Stack Overflow: https://stackoverflow.com/questions/16760378/how-to-check-if-a-file-is-binary

Anyway, here is my noscript:

#!/bin/bash
time for f in ${PATH//:/\/* }
do
[[ -f $f ]] &&

#checking if file is binary or noscript, some improvement would be nice
head -c 1024 "$f" | grep -qIF "" &&
value=$(awk 'NR==1 && /bash/ {printf "\033[1;32m%s is bash\033",FILENAME }
NR==1 && /\/sh/ {printf "\033[1;35m%s\033[0m is shell",FILENAME}
NR==1 && /python/ {printf "\033[1;33m%s\033[0m is python",FILENAME }
NR==1 && /perl/ {printf "\033[1;34m%s\033[0m is perl",FILENAME}
NR==1 && /ruby/ {printf "\033[31m%s\033[0m is ruby",FILENAME}
NR==1 && /awk/ {printf "\033[36m%s\033[0m is awk",FILENAME}' "$f")
[[ $value = *[[:print:]]* ]] && arr+=("$value"); unset value
#I first assign file to a $value because if I would have sent it directly to the the array, a '\n' would be added to `arr[]` if awk evalutes to nothing.
#for example, if the file would be written in a language not mentioned in the awk program, like lua, awk would return nothing and then arr+=('\n').
done

files=$(fzf --multi --ansi <<<"${arr[@]/%/$'\n'}" | cut -d " " -f 2) #f2 cause the first field is the ansi escape code for fzf, I guess...
#shellcheck disable=SC2086
[[ $files ]] && "${VISUAL:-${EDITOR:-cat}}" ${files/$'\n'/\ }


Any way to make it faster and more robust?
The idea behind it is to type in fzf `is\ bash` `is\ perl` `is\ shell` `is\ python` to see the numbers of noscripts you have for each language in your PATH and if you want multi-select the noscripts you want to read the source code in your EDITOR of choice, or it will be printed on the terminal via `cat`

https://redd.it/1byfsce
@r_bash

why shall IFS be set to "\n\b" and not just "\n" to work with space containing filenames ?

Hi all,

I don't get why simply setting IFS to "\\n" doesn't work .

let's say I have 2 files in the current directory named "big banana" and "huge apple" and "small orange"

$ IFS=$( echo -ne "\n" )

for i in $(ls *);

do echo "file: $i";

done

It doesn't work, the output is :


file: big banana

huge apple

small orange

instead of

file: big banana

file: huge apple

file: small orange



As a matter of fact it works if IFS is set the following way:

$ IFS=$( echo -ne "\n\b" )

Does someone know why \\b is also needed in IFS definition?

Thanks for your help

https://redd.it/1byha3q
@r_bash

Why won't it log ps -p?

read -r -p "Enter process name: " cpid
apid=$(pgrep "$cpid")
ps -p "$apid"
read -r -p "Log process yes/no " log
if [ $log == "yes" ]
then
ps -p "$apid" >> pslog.txt # this is where it fails

This is what I get when I run the noscript:

https://preview.redd.it/vpxc65zn9btc1.png?width=444&format=png&auto=webp&s=d7602ecad132d3ee980f6462a0c72b25f86a4d62

https://redd.it/1bz7mvy
@r_bash

How can I improve this recursive noscript?

**tl:dr; Need to handle git submodule recursion, so I wrote this. How can it be better?**

if [ -f ".gitmodules" ]; then # continue...

submodules=($(grep -oP '"\K[^"\047]+(?=["\047])' .gitmodules))

if [ "$1" == "--TAIL" ]; then
"${@:2}" # execute!
fi

for sm in "${submodules[@]}"; do
pushd "$sm" > /dev/null

if [ "$1" == "--TAIL" ] && [ ! -f ".gitmodules" ]; then
"${@:2}" # execute!
fi

if [ -f ".gitmodules" ]; then # recurse!
cp ../"${BASH_SOURCE[0]}" .
source "${BASH_SOURCE[0]}"
rm "${BASH_SOURCE[0]}"
fi

if [ "$1" == "--HEAD" ] && [ ! -f ".gitmodules" ]; then
"${@:2}" # execute!
fi

popd > /dev/null
done

if [ "$1" == "--HEAD" ]; then
"${@:2}" # execute!
fi

fi

The main reasons for this are the coupled use of git-submodules and the maven, where the we have one-overall-project aka the ROOT and it has NESTED submodules, while each submodule is a different maven module in the pom.xml file. This means we need to commit from the deepest edges before their parent-modules, while checking out should be done inversely.

*Yes, I know the 'submodule foreach' mechanism exists*, but it seems to use tail-recursion which does not work for what I'm trying to, though admittedly in a lot of cases it is sufficient.

**If anyone can offer up a better way than the noscript copying/removing itself, I'd be ecstatic!**

&#x200B;

https://redd.it/1bz6lb9
@r_bash

jq with variable containing a space, dash or dot

I have a json file that contains:

{
"disk_compatbility_info": {
"WD_BLACK SN770 500GB": {
"731030WD": {
"compatibility_interval": [{
"compatibility": "support",
}
]
}
}
},
"WD40PURX-64GVNY0": {
"80.00A80": {
"compatibility_interval": [{
"compatibility": "support",
}
]
}
}
},
}

If I quote the elements and keys that have spaces, dashes or dots, it works:

jq -r '.disk_compatbility_info."WD_BLACK SN770 500GB"' /<path>/<json-file>
jq -r '.disk_compatbility_info."WD40PURX-64GVNY0"."80.00A80"' /<path>/<json-file>

But I can't get it work with the elements and/or keys as variables. I either get "null" or an error. Here's what I've tried so far:

hdmodel="WD_BLACK SN770 500GB"
#jq -r '.disk_compatbility_info."$hdmodel"' /<path>/<json-file>
#jq --arg hdmodel "$hdmodel" -r '.disk_compatbility_info."$hdmodel"' /<path>/<json-file>
#jq -r --arg hdmodel "$hdmodel" '.disk_compatbility_info."$hdmodel"' /<path>/<json-file>
#jq -r --arg hdmodel "$hdmodel" '.disk_compatbility_info."${hdmodel}"' /<path>/<json-file>
#jq -r --arg hdmodel "${hdmodel}" '.disk_compatbility_info."$hdmodel"' /<path>/<json-file>
#jq -r --arg hdmodel "${hdmodel}" '.disk_compatbility_info.$hdmodel' /<path>/<json-file>
jq -r --arg hdmodel "$hdmodel" '.disk_compatbility_info.${hdmodel}' /<path>/<json-file>

I clearly have no idea when it comes to jq :) And my google foo is failing at finding an answer.

What am I missing?

https://redd.it/1bzhl55
@r_bash

Help with curl noscript

Hey guys, I have a noscript to list pages directory. The noscript is from a course and when the instructor runs in the video class works fine, but when I try to run on my PC it does't work. The test.txt file has a directory I know exists.

#!/bin/bash

for dir in $(cat test.txt); do
httpCode=$(curl -s -H "User-Agent: Teste" -o /dev/null -w "%{http_code}\n" $1/$dir/)
if [[ $httpCode == "200" ]]; then
echo "Directory found: $1/$dir"
fi
done


The var httpCode never gets 200, but when I run curl line in terminal, works fine. Can someone give me a hand here?


https://redd.it/1bzhilw
@r_bash

learning bash but why?

Hey guys and gals

Im new to the dev world and really new to bash but im just wondering whats the end game? like what is possible with bash can i change networks with a single .sh file, can i build and compile automation... im having a hard time finding anything about the more advanced process involved.
Just a noob looking to see why i should take the bash game to the end or just get the fundamentals and move on. by all means light me up as a noob but please bring some legit convo about it too.

https://redd.it/1c04j4f
@r_bash

How to extract a single string (containing a ) from a longer string

On KDE/Wayland. In a terminal I run:

kscreen-doctor --outputs

I get a long output:

Modes:  0:2560x1440@60!  1:2560x1440@170\  2:2560x1440@165......

I want to process the output so I just get the result shown in bold (the active setting). I think I should use grep, but not sure how to get it to select just the part of the output with the *. I searched for using grep to recognize a literal "*", but it's extracting just this bit of the output that I can't think how to approach. Any help appreciated.

https://redd.it/1c041ed
@r_bash

Will this work?

I want to parallelize a noscript, which is under a function() in .bashrc, and have the output logged to a text file. Will this work?

parallel noscript Log.txt noscriptname && exit

https://redd.it/1c0bews
@r_bash

trap '... ' ERR not working

I use that:

trap 'echo "ERROR: A command has failed. Exiting the noscript. Line was ($0:$LINENO): $(sed -n "${LINENO}p" "$0")"; exit 3' ERR
set -euo pipefail

This works for most cases.

But in one noscript the noscript terminates on non-zero exit, but I don't see the above message.

What could be the reason for that?

https://redd.it/1c0embh
@r_bash

What should I do to get over this? I cant find a solution online for this.

https://redd.it/1c0hwdf
@r_bash

What is the utility of read in the following noscript, and why we put genes.txt in the end of the loop?
https://redd.it/1c0ngvz
@r_bash