CODEWITHSUNDEEP
regexlinuxpathfilenames
csampi
csampi

Reputation: 55

regex for getting path and filename from string in linux

In bash I would like to get filename from a command line string. But not the current ($0) script!

I have a file full of scripts with parameters. I need just the scripts from it!

For example i have a string like: /path/to/file parameter1 -p2

i would like to get: /path/to/file (without the parameters) even in cases:

/an\ example/with.dot.in_it/.hidden_file.sh par\ ameter1 p.dot.2
./script.sh p1 p2
../script.sh p1 p2
/any////relative/../path/./to/script.sh p1 p2

So in any valid linux path and filename cases!

Is there a regex for this purpose, or is there any other way to get this?

Thanks in advance!

Upvotes: 2

Views: 2726

Answers (5)

Kevin
Kevin

Reputation: 56049

basename "$string"

Or

${string##*/}

Upvotes: 0

anubhava
anubhava

Reputation: 784938

You can use perl's command line regex feature combined with readlink command to always get full path to your script. Let's data is your file name with all the command and their parameters. You can use script like this to get full path of your scripts:

while read -r F
do
    SCRIPT=$(perl -pe 's/^(.*?)(?<!\\) .*$/\1/;s/\\//g' <<< $F)
    readlink -f "$SCRIPT"
done < data

Upvotes: 1

Hachi
Hachi

Reputation: 3289

if you really want to use regular expressions (many better solutions were discribed above) then this might help you:

/^(.+[^\\]) /

this matches all characters up to the first space, which doesn't follow a \

you get the path from the captured group

Upvotes: 0

dj_segfault
dj_segfault

Reputation: 12409

You can use the dirname command.

Upvotes: 0

jfs
jfs

Reputation: 414149

To get the name of the shell or shell script from inside .hidden_file.sh you could use $0:

echo "$0"

Upvotes: 0

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