Questions tagged [arguments]
An argument is usually defined as the actual value passed to a function, procedure, or command line program.
0
votes
2answers
34 views
How do I use command line arguments passed to a shell script that uses xargs?
I have a script that will iterate a set of git checkouts and run a git command in each directory.
I now want to be able to pass a parameter to the shell script from the command line and have that ...
0
votes
0answers
10 views
How to execute a script on several nodes using Slurm?
I have a R code that I want to execute on several nodes using Slurm, with each iteration of my paramater which goes on a node. This is my Slurm code :
#!/bin/bash
#SBATCH -o job-%A_task.out
#SBATCH -...
3
votes
2answers
72 views
How to include custom command options in a bash script with $1 and $2?
I have a script myscript.sh
#!/bin/sh
echo $1 $2
which is used something like ...
./myscript.sh foo bar
which gives me an output of ...
foo bar
but how can i make this script include custom ...
2
votes
4answers
97 views
Correctly quote array that is being passed indirectly via another command
I need to pass an array of filenames to a command, preserving proper quoting. So far, so good. Unfortunately the command is actually a sub-command that is, in turn, invoked by another command. ...
-1
votes
1answer
61 views
Bash script, error “Arg list too long”
I need to run a bash script in a .lua file:
os.execute ("/path/to/file.sh")
file.sh:
#!/bin/bash
route add 149.36.98.78 reject
The permissions for file.sh is [-rwxr-x---] root www-data
I'm ...
1
vote
2answers
38 views
For loop printing echo command only once
In this small for loop I created, I need the loop to print this message only once for all arguments.
for arg in $@
do
echo "There are $(grep "$arg" cis132Students|wc -l) classmates in this ...
2
votes
2answers
86 views
How do I delete files except some specific files passed as parameters?
The task is to write a shell script with n+1 arguments where the first one is the directory and the rest is the specified files and will delete all but specified files.
E.g. calling rmexcept . '*....
6
votes
3answers
458 views
How can I list files in reverse time order by a command and pass them as arguments to another command?
I have a program which takes in some files as arguments in one command line. I would like to invoke it with all the files in a directory listed in reverse time order.
For example:
I have following ...
11
votes
4answers
2k views
Why doesn't using multiple commands with a || or && conditional work?
This works on a shell (bash, dash) prompt:
[ -z "" ] && echo A || echo B
A
However, I am trying to write a POSIX shell script, it starts like this:
#!/bin/sh
[ "${#}" -eq 1 ] || echo "...
2
votes
2answers
54 views
What is the Position_args in man page
I just Joined Linux
and I trying to explore commands with the available resources (mainly man pages)
It's easy to understand what are the option args(content in usage and options) in a command ...
1
vote
3answers
40 views
Script with more than one flag
I am trying to create a script that lowercases/uppercases files or directories.
modify [-r] [-l|-u] <dir/file names...>
I am currently using getopts to check for flags. However, I can't run ...
1
vote
1answer
547 views
Passing arguments from one script to another
Let's say I am in a Bash script and am sourcing a file. How do I pass variables to another script after I source the file like this.
sed -i 's/ = /=/' $file
source $file
Let's say file contains
...
0
votes
1answer
29 views
How to pass list of arguments into a function
I want to pass arguments from a loop into a function func. For simplicity let's say we are working with the loop
for x in {1..5}
do
for y in {a..c}
do
echo $x$y
done
done
I'm just ...
1
vote
1answer
18 views
Can a subshell fetch an argument within the parent shell scope?
I want to run different versions of a utility onto the same data like so:
current_dir$ (cd my_utility_version_dir && exec ./my_util my_data_file)
Is there a way for my_util to look for ...
0
votes
2answers
53 views
How to split a string argument in a bash over multiple lines without adding space
I'm running the following command:
some_command --flag "foo\
bar\
quux" arg2
This causes the string to be passed as foo\tbar\tquux.
I'm looking for a way to have this argument passed ...
3
votes
1answer
199 views
How to execute local script by passing arguments on remote via ssh as a different user?
I am trying to execute a local script on remote server via ssh using keytab authentication. I am able to connect to remote via ssh as sachin(user who gets the ticket) and then I am spawning a bash ...
1
vote
1answer
27 views
Stop a program from reading argument
I ran into an issue where I am using a wrapper around a compiler to do static code analysis.
The command looks like:
sourceanalyzer -b Program clang -E File
The -E argument is for the clang ...
1
vote
3answers
75 views
DOS command to Bash command conversion
I need to make Bash take DOS commands in with arguments and then convert the main command to a Bash command and still use the arguments if there are any arguments.
The part I am lost on is how to ...
0
votes
2answers
61 views
What does the -l argument mean in tcsh?
I'm running a tcsh shell.
I have questions about the -l option in set -l.
When I look at man for the set command, I don't see the -l argument.
When using tcsh shell, what does the -l argument mean?
...
1
vote
3answers
131 views
Why is it uncommon for stdin inputs to have option-like inputs, while common for command line arguments?
POSIX and GNU have their syntax styles for options.
For all the commands that I have seen, they accept option-like inputs as command line arguments.
Is it uncommon for a program to accept option-...
5
votes
1answer
824 views
What's going on with this dash '-' thing?
I was trying to export the Python environment requirements and this is what I intended to do:
conda list -e > requirements.txt
However I mistakenly typed this instead:
conda list -e -> ...
-1
votes
1answer
43 views
Shell Function: Sequence of Pipelines as Argument
I have a shell function (in .bashrc) which creates a temp file, executes the arguments (including all sequence of pipelines), redirects it to a temp file and then open it in VS Code.
I invoke the ...
4
votes
3answers
582 views
Passing generated empty strings as command line arguments
I do the following:
$ ./input ""
Output:
argc 2
argv[1][0] 0
But if I want to pass (several) empty quotes in program based manner:
$ python -c 'print "\"\""'
""
./input $(python -c 'print "\"\""'...
10
votes
3answers
614 views
How can I generate arguments to another command via command substitution
Following on from:
unexpected behaviour in shell command substitution
I have a command which can take a huge list of arguments, some of which can legitimately contain spaces (and probably other ...
6
votes
2answers
379 views
How to have a script work with “$@” or a default list of parameters while not breaking paths with whitespace?
I want a script that will run another utility over some default paths if no parameters are passed to it; ideally I want this safe for paths that contain spaces.
So far I have script.sh:
#!/bin/sh
...
0
votes
1answer
275 views
Understanding the combination of ufw --force enable
I rent a remote machine with Debian/Ubuntu and desire to filter all ports I don't use through iptables via ufw.
The only ports I allow (both with TCP and UPD) are 22,25,80,443.
If I understand man ...
0
votes
1answer
90 views
Require command line argument for script to run [closed]
I'm trying to require a script to only run if the command line argument provided is a specific text file called dailyUserProcs.20181203 in the same directory as the script. I am also running Putty.
...
2
votes
3answers
212 views
'rename' with expression|replacement with a leading '-' (hyphen|minus)
I have many files like xyz_123_foo.ext for which I would like to add -bar to the filenames at the end to result in xyz_123_foo-bar.ext. I tried:
rename . -bar. xyz_*
which resulted in:
rename: ...
5
votes
1answer
612 views
How to distinguish between a positional parameter and an option?
Both a positional parameter ($1, $2, and so forth) and an option (and/or argument) are both written directly after a command, so what is the definition or phrasing to explain how to distinct them?
In ...
0
votes
1answer
95 views
Does Konsole permit launching a terminal with a custom font-size on the command-line?
If I want to launch a Konsole can I do so with a font-size of 30px rather than the default?
0
votes
1answer
190 views
Where can I configure Chromium's default command line arguments?
I've seen lots of places people have suggested to store command line arguments,
~/.config/google-chrome-flags.conf
~/.config/chromium-flags.conf
/etc/default,
My version of chromium doesn't seem to ...
0
votes
3answers
432 views
Read arguments separated by newline
I have a script and I receive data from stdin as an argument separated by newlines say I have
string1,string2
string3,string4
And I want to take sperately string1,string2 and string3,string4.
But I ...
1
vote
1answer
63 views
How to make my bash function known to external program
I have bash functions foo and bar in my ~/.bashrc.
Function foo calls an external command ext_command that itself takes as one of its arguments another command. I want to pass bar as that command, i....
-3
votes
2answers
743 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 $1
Can you tell me how do I make this second example — the same ...
0
votes
2answers
51 views
Are `-name` and `-exec` options or non-option arguments of `find`?
Are -name and -exec options or non-option arguments of find? They look like short options, and they are called find expressions, if I am not mistaken. For example,
find . -name "*.txt" -exec echo {} ...
4
votes
2answers
453 views
find -exec {} + argument list limit
I know that when the maximum argument list size is reached, xargs keeps creating new lists until all of the files are included;
but does find -exec <command> {} + do the same thing or will it ...
2
votes
1answer
164 views
Does the system-wide limit on argument count apply in shell functions?
The other question asks about the limit on building up commands by find's -exec ... {} +. Here I'd like to know how those limits compare to shells' inner limits. Do they mimic system limits or are ...
1
vote
2answers
144 views
How does the find command know how many arguments to feed with “-exec … {} +”?
In a command like this:
find /data ! -type d -exec rm -f {} +
the + is for batch execution of rm -f. find should batch as many arguments as possible. But how does it know the limit?
1
vote
4answers
955 views
Argument list too long error with makefile
In a makefile, I have
@echo "$(IGNORE_DIRS) $(CLEAN_FILES) $(CLEAN_DIRS) $(REALCLEAN_FILES)" | tr ' ' '\n' >> $@
The problem is that $(CLEAN_FILES) is quite large, so when I run make, I get
...
1
vote
1answer
46 views
Partially use the -y argument when installing things in Debian in one line
I have a long apt-get install sequence and for most software packages I need the -y argument.
I could do the following in two lines:
apt-get upgrade unattended-upgrades sshguard curl wget git ...
1
vote
2answers
59 views
How can I provide an array as a file argument to a script, so that each element is like a line in a file?
Suppose a bash script expects an argument to be a file. But we have a bash array, and would like to provide the array in some way as an argument to the script, as if there were a file whose lines are ...
4
votes
1answer
231 views
First argument passed to wrapper script is ignored
So I've got the following script:
#!/bin/bash
echo '-------------------------'
echo $0
echo $1
echo $@
echo '-------------------------'
exec su -- someuser -c "/tmp/elasticsearch-6.4.2/bin/...
3
votes
1answer
368 views
does bash `shift` command change argument count `$#`
When I use the bash shift command, does that change the argument count in $#?
Note from author: When I had this question I did not find it (yet) on this community. Therefore I simply tried it and ...
0
votes
2answers
563 views
How to pass multiple parameters to su <USER> -c “command”
I want to execute composer as non root user. So I renamed main composer executable file to composer-call and then create another executable file called composer.
#composer.sh
su nginx -c "composer-...
0
votes
0answers
209 views
xargs argument in the middle of command [duplicate]
Why is this command not working?
echo 'foo
bar' | xargs -I % -L 1 echo yeah % yeah
It produces the following output:
yeah % yeah foo
yeah % yeah bar
While I expected the following output:
yeah ...
0
votes
1answer
445 views
How to pass argv arguments to a C program using a file or python script in linux?
I used to be able to pass input to C program by first writing a python script and using pipe to send it to the C program as an input
or write the output of python script to a file and just doing r &...
0
votes
1answer
223 views
How to detach-sign a file with a specific private key? || Why this fails?
I have a .tar.xz file which I would like to detach-sign using my gpg private key.
The problem is, I have multiple of private keys imported to my keyring and need to choose, which one to use.
...
0
votes
3answers
102 views
How to parse arguments with space inside bash function
In bash I am calling function:
myFunction "1 2"
myFunction()
{
echo "$1"
echo "$2"
}
this prints me "1 2" and empty row. How I can parse arguments so it will print on one row 1 and ...
2
votes
1answer
60 views
Optional commands for bash script
I have a Bash script that sets various environment variables and runs a program. I want one of those variables to change if I run the command with an argument debug.
I know 100% how to do this in Lua ...
2
votes
1answer
172 views
Escape keywords with tmux send
Using tmux to send commands along from one terminal to another, I realize that
$ tmux send -t mySession "text" ENTER
correctly sends text, but
$ tmux send -t mySession "up" ENTER
sends text again, ...
