BASHAM! : A Simple Bash Script to Manage Your Assembly Projects.
I've been fooling away my days by doing my hobbies. I was supposed to learn assembly but my idiotic ass learnt bash scripting instead. At least I can still learn assembly a bit with it...
BASHAM!
Yeah, that's the repo. I'm looking for attention so I get some more contributors... 🫤
https://redd.it/1jynn7o
@r_bash
Replacing echo with printf broke my scripts
Taking the advice in https://www.reddit.com/r/bash/comments/1519wby/why\_printf\_over\_echo\_noob\_question/ and elsewhere, I proceeded to dosed -i 's/echo /printf \x27%s\\n\x27 /' bin/*.sh
Whereas echo had worked perfectly, many strings now mysteriously got truncated. I reverted back to echo and all is working well, again, but I'm intrigued why this happened. I tried replacing %s with %b but it made no difference.
Does printf %s not handle utf-8 correctly or something?
https://redd.it/1jxi95b
@r_bash
Actual Vim Motions in bash?
I only found like two posts on reddit and another on StackOverFlow where the user is expressing frustration of set -o vi and seeking an alternative approach to get vim motions in his shell, which is very shocking to me but maybe I just suck at googling right? or people know their shell keybinings unlike me - lazy to learn something new. Anyway, I found this project which pulls it off: https://github.com/akinomyoga/ble.sh
The problem though is that there's noticeable latency that I can't wrap my head around, so if someone uses this and it doesn't have latency please tell me what terminal emulator you use.
https://redd.it/1jwrevg
@r_bash
fuzpad - A minimalistic note management solution. Powered by fzf.
https://terminaltrove.com/fuzpad/
https://redd.it/1jvxzh1
@r_bash
Reading then writing the same file empties it
I have a script and when running it ./script >~/.config/chkupdates/chkupdates.conf ($conf in the script), I'm not sure why the output isn't overwriting the file with what shows in stdout--the file is instead cleared with a newline.
If I ./script >/tmp/test, I can see the expected output is saved to this arbitrary file, so something appears to be wrong with streaming the data and overwriting to $conf.
The script reads $conf, so I already made efforts to have the script reads this file in a loop which then outputs to a $tmpfile which the script print the $tmpfile's contents so that the user can pipe it out to $conf safely.
https://redd.it/1jvgvg5
@r_bash
Dynamic Motd (Message of the Day)
https://redd.it/1jvfhui
@r_bash
Shell script confounding me ...
I've been working on a shell script that automates file movements. I'm using the Mac Automator with a Folder action. Drop a file on a folder and the script disperses the file to specific folders based on the file extension {or other string the file name}. All works fine except it does not work with image files [.jpg, .jpeg, .png, .dng, .bmp, .gif, .heic files.\] Pages files, txt files, doc files, and most others work, Below is the opening snippet of the script, Can anyone see my blunders? Will this tool NOT work with image fiiles?
Even when I isolate this to one type of image file and repeat the block for aaeh type of file, it still fails,
\#start
for f in "$@"
do
DEST="" # Image files NOTE: "bmp" does not work
if [[ $f == *".png"* || $f == *".jpg"* || $f == *".jpeg"* || $f == *".dng"* || $f == *".gif"* || $f == *".heic"* \]\]
then
DEST="Users/dparcher/Documents/Images"
\# text files:
elif [[ $f == *".txt"* \]\]
then
DEST="/Users/dparcher/Documents/TXTFiles"
\# ... etc, (,csv files also do no process?)
\# and finally:
fi
if [[ $DEST != "" \]\]
then
osascript -e "display notification \\"Moved $f to $DEST\\""
\# now move the files accordingly
mv $f $DEST
elif
osascript -e "display notification \\"$f was NOT moved.\\""
done
{Bang Head Here}
Thanks for any help offered ...
https://redd.it/1jv605d
@r_bash
Can anyone suggest me good Bash book filled with small examples only?
Hi everyone,
Can anyone suggest me good Bash book filled with lots of small examples with explanation? . I'm already going on with Advanced Bash Scripting By Mandel sir, and would like to get a book/online resource that has plenty of Bash Examples with explanation to compliment it with Mandel sir's book.
Thanks and Regards
https://redd.it/1jtsqhr
@r_bash
Need Help for bash script
I'm trying to prepare a script in bash that books a seat in a library in my city via Affluences but i can't find any API on the web page, my idea was to use the cURL library and send a request to the server of the app, is there any advice or sub you could suggest?
https://redd.it/1jsc5s4
@r_bash
noob in bash, need learn
Hey guys, I’m a student and getting into sysadmin stuff. I heard knowing Bash scripting is kinda essential, and I really wanna learn it but I’m a total Linux noob and have no clue where to start. Any tips?
And sry for my english, im trying my best haha
https://redd.it/1jrmtqu
@r_bash
Command substitution, piping
If the following is written in with pipes instead of command substitutions, how would they compare, particularly at the lower level (e.g. do they involve the same # of forks and execs)? And differences in performance in general or other implications.
It's a very simple example, normally I would just use external commands and pipe if it's a one-off to be run on the command line, whereas for scripts I would like to be more a little more conscious about how to write better bash (beyond simple general optimizations like avoiding excessive unnecessary external commands).
filename="$(realpath "$1")"
dir="${filename%/}"
size="$(du -b "$filename")"
size=$(numfmt --to=iec --format='%0.5f' "${size%% }")
...
https://redd.it/1jqyeg8
@r_bash
An alias for show then edit and then execute? anything like :p for history command but for CLI command.
Hi I'd like to get an alias that let me edit and then <CR> for execute.
I will change the flag --date for -# ¿0? -# day according to the day I want to put with respect to the current day.
The command is this:
alias dd="touch ./markdown$(date --date='-1 day' +%a%-d).md"
Thank you and Regards!
https://redd.it/1jq1qop
@r_bash
Getting a job without experience
I have my bachelor's degree in Mechatronics Engineering, I graduated in a college in Mexico in 2015.
I did an internship of 6 months when I graduated and after that my family and I relocated to the States. But, since my visa didn't let me to work just to live here I wasn't able to work here until now that I have my permanent residency.
In the meantime I took 2 certifications one in C with Linux bash scripting and another one in SQL Databases.
I have been applying for a couple of months but haven't had answers from the companies I applied for.
What do you guys think is the best path to get hired?
I would greatly appreciate your advice and suggestions.
https://redd.it/1jp3bj0
@r_bash
how do I make such beautiful warning messages in my script like pnpm of NodeJS?
https://redd.it/1jobphj
@r_bash
If I'm in the wrong place, they can erase it. Excuse me! Has anyone references about this command or program? https: / / linrunner.de / tlp / index.html
Hi I have problem with my laptop battery: at 88% of charge shutdown the laptop without alert me.
I think that I need to calibrate the battery.
this program by command line from my repo Lubuntu works on batteries...
any reference about it?
TLP https://linrunner.de/tlp/index.html
Thank you and regards!
https://redd.it/1jo3yjm
@r_bash
Why does this work?
arg2list() {
local toset=$1
shift 1
# shellcheck disable=SC2145
# we actually want to eval on structured data.
# so mixing strings with arrays is the point
# shellcheck disable=SC2294
# and yes eval on a string negates the benefits of arrays,
# thats why we leave it an array.
eval "$toset=($@)"
}
addFlags() {
local n flag before after var
# Disable file globbing, since bash will otherwise try to find
# filenames matching the the value to be prefixed/suffixed if
# it contains characters considered wildcards, such as `?` and
# `*`. We want the value as is, except we also want to split
# it on on the separator; hence we can't quote it.
local reenableGlob=0
if [[ ! -o noglob ]]; then
reenableGlob=1
fi
set -o noglob
# shellcheck disable=SC2086
arg2list before $1
# shellcheck disable=SC2086
arg2list after $2
if (( reenableGlob )); then
set +o noglob
fi
var="argv_tmp"
printf '%s\n' "char **$var = calloc(${#before[@]} + argc + ${#after[@]} + 1, sizeof(*$var));"
printf '%s\n' "assert($var != NULL);"
printf '%s\n' "${var}[0] = argv[0];"
for ((n = 0; n < ${#before[@]}; n += 1)); do
flag=$(escapeStringLiteral "${before[n]}")
printf '%s\n' "${var}[$((n + 1))] = \"$flag\";"
done
printf '%s\n' "for (int i = 1; i < argc; ++i) {"
printf '%s\n' " ${var}[${#before[@]} + i] = argv[i];"
printf '%s\n' "}"
for ((n = 0; n < ${#after[@]}; n += 1)); do
flag=$(escapeStringLiteral "${after[n]}")
printf '%s\n' "${var}[${#before[@]} + argc + $n] = \"$flag\";"
done
printf '%s\n' "${var}[${#before[@]} + argc + ${#after[@]}] = NULL;"
printf '%s\n' "argv = $var;"
}
I need to know why this works.
Why does this function preserve the arg escaping correctly? I sorta get it, and I sorta don't. Is there a better way to do this that works in posix sh like this does?
All the explanations written in the PR are by me, they represent my current understanding, as are the explanations underneath the shellcheck disables.
Is my understanding correct?
arg2list() {
local toset=$1
shift 1
# shellcheck disable=SC2145
# we actually want to eval on structured data.
# so mixing strings with arrays is the point
# shellcheck disable=SC2294
# and yes eval on a string negates the benefits of arrays,
# thats why we leave it an array.
eval "$toset=($@)"
}
addFlags() {
local n flag before after var
# Disable file globbing, since bash will otherwise try to find
# filenames matching the the value to be prefixed/suffixed if
# it contains characters considered wildcards, such as `?` and
# `*`. We want the value as is, except we also want to split
# it on on the separator; hence we can't quote it.
local reenableGlob=0
if [[ ! -o noglob ]]; then
reenableGlob=1
fi
set -o noglob
# shellcheck disable=SC2086
arg2list before $1
# shellcheck disable=SC2086
arg2list after $2
if (( reenableGlob )); then
set +o noglob
fi
var="argv_tmp"
printf '%s\n' "char **$var = calloc(${#before[@]} + argc + ${#after[@]} + 1, sizeof(*$var));"
printf '%s\n' "assert($var != NULL);"
printf '%s\n' "${var}[0] = argv[0];"
for ((n = 0; n < ${#before[@]}; n += 1)); do
flag=$(escapeStringLiteral "${before[n]}")
printf '%s\n' "${var}[$((n + 1))] = \"$flag\";"
done
printf '%s\n' "for (int i = 1; i < argc; ++i) {"
printf '%s\n' " ${var}[${#before[@]} + i] = argv[i];"
printf '%s\n' "}"
for ((n = 0; n < ${#after[@]}; n += 1)); do
flag=$(escapeStringLiteral "${after[n]}")
printf '%s\n' "${var}[${#before[@]} + argc + $n] = \"$flag\";"
done
printf '%s\n' "${var}[${#before[@]} + argc + ${#after[@]}] = NULL;"
printf '%s\n' "argv = $var;"
}
A universal CLI run command for projects?
https://github.com/pran13-git/Vroom
https://redd.it/1jw7rjp
@r_bash
Can't seem to find decent commenting style
I want first comment (first line) to describe the entire group of code, second comment (second line) to describe only first line of code starts with `tracked=`. How to best make this more obvious? The second comment is too long to fit on the same line as the code.
# skip parsing to print full line when a line doesn't start with
# trim leading whitespaces. Ref:
# https://web.archive.org/web/20121022051228/http://codesnippets.joyent.com/posts/show/1816
tracked="${tracked#"${tracked%%[![:space:]]*}"}"
if [[ "$tracked" =~ ^[^[:alnum:]] ]]; then
echo "$tracked"
continue
fi
And in general, I'm not sure there's much decent logic at all to have a comment represent more than one block of code (it might imply multiple blocks, but how do you know when it should end)? Having an end marker comment seems excessive considering I never really come across it.
Probably more of a general coding question, looking for a solution that can work across multiple languages.
https://redd.it/1jvdhmr
@r_bash
Function to generate images with Gemini
https://preview.redd.it/ysghltkzxvte1.png?width=1408&format=png&auto=webp&s=fdbeb494d3dcc063f2314e8c93aaa2f0c25be10b
$ declare -f imagen
imagen ()
{
curl -s https://generativelanguage.googleapis.com/v1beta/models/imagen-3.0-generate-002:predict?key=$GEMINIAPIKEY -H 'Content-Type: application/json' -X POST -d '{"instances": {"prompt": "'"$1"'"},"parameters": {"sampleCount": 1, "aspectRatio": "16:9"}}' | jq -r '.predictions0.bytesBase64Encoded' | base64 -d > "$2.png"
}
$ imagen "A gorilla surfing near the beach" gorilla
$ file gorilla.png
gorilla.png: PNG image data, 1408 x 768, 8-bit/color RGB, non-interlaced
https://redd.it/1jvinxe
@r_bash
Replace partial lines of a file with another file's lines
I have a script that has the output e.g. (keeping the examples very short):
# date: 2025-04-01T16:31:24-0400
firejail-git 0.9.73.r10.gc66588df8
yt-dlp 2025.03.21
syncthing 1.23.4
libvirt 4.2.1
I want to replace all these lines (comments excluded) with lines in a file whose first field (delimited by space) matches the file's lines' first field and and potentially its second field (if it starts with a number), else add the version number as the second field. Such a file looks like this before replacement:
# date: 2024-04-01T16:31:24-0400
# blah blah blaah
abc 1.234
firejail-git 0.9.72.r10.gc66588df8
yt-dlp
# blah blah blaah
syncthing 1.20.4 # blah blah blah
libvirt
After replacement:
# date: 2025-04-01T16:31:24-0400
# blah blah blaah
abc 1.234
firejail-git 0.9.73.r10.gc66588df8
yt-dlp 2025.03.21
# blah blah blaah
syncthing 1.23.4 # blah blah blah
libvirt 4.2.1 # blah blah
The changes that were made:
The date line was changed (in this case, it should match 2 fields `# date:`
The file was updated to the following accordingly: firejail-git 0.9.72.r10.gc66588df8, yt-dlp 2025.03.21, syncthing 1.23.4 # blah blah blah (note that the comment is preserved, only the version was updated with field 2 changed), libvirt 4.2.1 # blah blah has the version added as second field)
I want only the relevant lines changed, with the rest of the file preserving their contents (comment lines and line order).
How to go about this? I had a solution with awk that was pretty close but realized arrays are ordered so couldn't preserve order of the lines. I'm not sure if there's a more efficient way that doesn't running involve running e.g. sed commands (not familiar with sed) on each line which seems to require writing the file for each replacement.
I want comments and line ordering to be preserved. I can't guarantee that the second field must be the version number--it could just be an arbitrary string and in that case I don't want to replace it--only insert the version number as the new second field.
https://redd.it/1juum98
@r_bash
how to combine find and identify? pipe or &&
Hi, I was trying to use these 2 commands together but I fail.
I used find . -type f -name "3434.jpg fine
I used identify ./ fine
how do you combine then?
¿ find -name ###.jpg | identify ??
Thank you and regards!
https://redd.it/1jutpsq
@r_bash
ShellCheck problem with sourcing a script
I'm using ShellCheck for the first time and I'm getting an error with a line in the script being checked which is sourcing another script.
My understanding of the ShellCheck documentation is that I should be able to embed a shellcheck directive telling it what to use for a source path.
It's not working.
The relevant lines in my script are:
SCRIPT_DIR=$(dirname "$0")
\# shellcheck source-path=SCRIPTDIR
source "$SCRIPT_DIR/bash_env.sh"
I get the following error:
In _setenv.sh line 45:
source "$SCRIPT_DIR/bash_env.sh"
\^-----------------------\^ SC1090: Can't follow non-constant source. Use a directive to specify location.
What am I doing wrong?
Thanks in advance for any help you can give me.
https://redd.it/1jtekj9
@r_bash
Digital footprint and website testing tool recommendations
I'm cybersecurity student and getting into bash scripting. I want to make my own universal tool to do Digital footprint checks, website vulnerabilitie check network scans and more. I have the website vulnerabilitie check partly done using, curl, nmap, testssl, webanalyse and ffuf. And I am working on retire js and npmjs to find old Java scripts. What more could I add to this?
Secondly I want to make a Digital footprint check. What tools / FOSS that can be used in bash script to do such a scan? are there any api's I need to get? I know that people sometimes use GB's worth of leaked credentials files is there any legal(open to dm's) way to obtain this.
Any more recommendation or other tools someone uses or likes to be made. when most of my tools work I'm thinking to open source everything on a Github
https://redd.it/1jr815b
@r_bash
Where can I read about CLI-colors for understand and learn about it?
Hi, my CLI has 16 colors using neofetch command,
screenshot 1 https://imgbox.com/PEfXpQZ4
where can I read about it?
If I do vim :xtermcolor(a plugin) I have a palette with more colors...
screenshot 2 https://imgbox.com/TugiCQy6
what are the colors I have?
THank you and regards!!!
https://redd.it/1jql3ov
@r_bash
Searching in always in the whole history
I search in my bash history, but somehow after I skipped something accidently by pressing:
ctrl + r a second time, I can not find it.
I love the search option, but this is so weird behaviour. Can anybody please explain, why this happens and suggest a solution, so that I can search all the time for everything?
https://redd.it/1jou6sf
@r_bash
OctoWatch - A minimalistic command-line octoprint dashboard
Want to monitor your 3D prints on the command line?
https://preview.redd.it/dr5jp1jv05se1.png?width=759&format=png&auto=webp&s=15aa7483d36c61f3525c56e0d13bb06fa3ec7563
https://preview.redd.it/w4cr4yiv05se1.png?width=762&format=png&auto=webp&s=340d805a21a63fc6d70f4f20b999dc7a682dbb51
OctoWatch is a quick and simple dashboard for monitoring 3D printers, in your network. It uses OctoPrint’s API, and displaying live print progress, timing, and temperature data, ideal for resource-constrained system and a Quick peak at the progress of your prints.
Since i have 2, 3D printers and after customizing their firmware (for faster baud rates and some gcode tweaks, for my personal taste) - i connected them with Raspberry pi zero 2W each. Installed octoprint for each printer so i can control them via network.
Since octoprint is a web UI made with python, and it always takes 5-8 seconds to just load the dashboard. So, I created octowatch - it shows you the current progress with the minimalistic view of the dashboard.
If by chance, you have can use this to test it - your feedback is highly appreciated.
Here's the link to the project: GitHub - TheKvc/octowatch: OctoWatch is a quick and simple dashboard for monitoring 3D printers, in your network. It uses OctoPrint’s API, and displaying live print progress, timing, and temperature data, ideal for resource-constrained system and a Qucik peak at the progress of your prints. 3
*Consider giving it a star on github
Note: This is made in bash, I will work on making it in batch/python as well, But i mainly use linux now...so, that might be taking time. Let me know, if you want this for other platforms too.
https://redd.it/1joljjd
@r_bash
If I'm in the wrong place, they can erase it. Excuse me! Has anyone references about this command or program? https: / / linrunner.de / tlp / index.html
Hi I have problem with my laptop battery: at 88% of charge shutdown the laptop without alert me.
I think that I need to calibrate the battery.
this program by command line from my repo Lubuntu works on batteries...
any reference about it?
TLP https://linrunner.de/tlp/index.html
Thank you and regards!
https://redd.it/1jo3zhy
@r_bash
Can someone explain this to me?
➜ ~ echo ' escaped_input=$(something)' > test.sh
sed -E 's/^(\s)escaped_input=\$\(.*\)$/\1user_input=$(whatever)/' test.sh
sed -iE 's/^(\s)escaped_input=\$\(.*\)$/\1user_input=$(whatever)/' test.sh; cat test.sh
user_input=$(whatever)
escaped_input=$(something)
