All Questions
15 questions
1
vote
2
answers
454
views
In Bash, how can I compute and capture the result from an intermediate node in a pipeline?
In Bash, how can I compute and capture the result from an intermediate node in a pipeline?
For example, given a list of integers and a command or function maximum, using a single Bash pipeline, how ...
- 567
2
votes
3
answers
1k
views
A universal `while read something` to `parallel` conversion/replacement
I have a ton of scripts which do this:
command | while read something; do
a
long
list
of
commands
done
Has anyone ever thought of how to run all the commands fed through the pipe ...
- 32.1k
1
vote
1
answer
477
views
bruteforcing keepassxc with bash
I have forgotten part of my password to Keepassxc database (.kdbx with keyfile). The password consists of 20 symbols, 17 of which are known. I have generated the list of all possible combinations ...
- 21
3
votes
3
answers
4k
views
Multiple commands and subshell execution after pipeline
Ok, I know that in Bash (by default, without 'lastpipe' bash option enabled) every variable assigned after a pipeline is, indeed, executed in a subshell and the variable itself dies after subshell ...
- 41
1
vote
2
answers
1k
views
How to pipe git log to curl command
My goal is to perform a curl with the output of a command as curl payload, separately they work, but I have not been able to merge both things into one.
This is my first command, it prints the ...
- 141
0
votes
0
answers
305
views
How to portably test for a SIGPIPE failure
In a bash script, I have a pipeline of this form
/bin/find ... | grep --quiet --max-count=1 .
Basically, I am just testing, yes/no, whether /bin/find found anything.
Therefore, if /bin/find fails ...
- 16.2k
0
votes
1
answer
53
views
Find files and specify some to come first in playlist, and the rest in random order?
The following code creates a list of the files in the directory and then shuffles them in a random order then spits out the file in a text document called list.txt
find *.EXT | sed 's:\ :\\\ :g' | ...
- 533
5
votes
1
answer
13k
views
Why isn't it possible to read from `stdin` with `read` when piping a script to bash?
I'm not looking for work-arounds or solutions for the issue. I'm fine with it not working like that in bash. I just don't understand why it doesn't work.
I'm looking for an in-depth answer why the ...
- 3,504
-2
votes
2
answers
9k
views
Calling sh with script on stdin and passing command line arguments
This works of course. I can run ./test1.sh cats and the argument cats is passed correctly to ls.
$ cat test1.sh
#!/bin/sh
ls -l $1
Can you tell me how do I make this second example — the same content ...
- 11
7
votes
1
answer
4k
views
How to exit early on pipe close?
I use golang for writing programs that are too complex to express as bash functions. The programs read stdin line by line and write modified output to stdout.
The problem with this iterating over all ...
- 9,095
1
vote
2
answers
2k
views
How to integrate multiple Python/Perl scripts to be executed in one bash script?
I have the following Perl scripts (though this applies to Python and other scripting languages): script1.pl, script2.pl, script3.pl
The way these scripts where written, users execute them with input ...
- 1,663
2
votes
2
answers
3k
views
viewing printf after pipe (or subshell?)
Ok, this is hard to distill to a single question because it really depends on how I'm going to troubleshoot it.
The following script is meant to pipe mount.cifs commands to a while loop that enters ...
- 297
1
vote
2
answers
943
views
Pipe to my own script
I've recently noticed this message from grep
"grep: warning: GREP_OPTIONS is deprecated; please use an alias or script"
I receive this warning because --color=always is defined in my .bashrc file. ...
- 13
1
vote
3
answers
203
views
Automating pipes?
I find myself using basically the same line over and over again:
cat file | command1 | command2 | command3 > file
Is there a way I can put all these pipes into one script, so I can just run
...
- 449
13
votes
2
answers
7k
views
Piping for loop output prevents local variable modification
I'm trying to write a simple bash function that takes, as its arguments, a number of files and/or directories. It should:
Fully qualify the filenames.
Sort them.
Remove duplicates.
Print all that ...
- 233