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Take A QuizGeneral Tech Bugs & Fixes 2 years ago
Posted on 16 Aug 2022, this text provides information on Bugs & Fixes related to General Tech. Please note that while accuracy is prioritized, the data presented might not be entirely correct or up-to-date. This information is offered for general knowledge and informational purposes only, and should not be considered as a substitute for professional advice.
Your existing code tests for the existence of a file called *.csv
(literally). This is why it does not work. It does that because the *
is within double quotes.
Using [ -f *.csv ]
will not work as expected if there are multiple files matching the pattern. If there are multiple files matching *.csv
, the cp
command will additionally not work properly, unless listing.txt
is the name of a directory.
To rename the first of the files matching the filename globbing pattern *.cvs
in the current directory, do this:
#!/bin/sh
set -- *.csv
while [ "$#" -gt 0 ] && [ ! -f "$1" ]; do
shift
done
if [ -f "$1" ]; then
mv -- "$1" listing.txt
fi
This first sets the positional parameters, $1
, $2
, etc., the all names matching *.csv
in the current directory. Then it starts looking for the first regular file, or symbolic link to a regular file, among the matched names (the code assumes that the *.csv
glob may expand to directory names etc.). If a regular file, or a symbolic link to one, is found, it renames that file to listing.txt
.
In the zsh
shell:
mv -- *.csv(-.[1]) listing.txt
This uses a glob modifier for the *.csv
globbing pattern that returns the first regular file or symbolic link that matches the pattern.
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manpreet
Best Answer
2 years ago
I am trying to write a script that starts off with f="https://forum.tuteehub.com/tag/testing">testing for the f="https://forum.tuteehub.com/tag/existence">existence of a CSV file. If it finds one, rename it to listing.txt.
This is what I have but it doesn't work.