CODEWITHSUNDEEP
bashconditional-statements
Elena Greg
Elena Greg

Reputation: 1165

Checking the existence of files

The following script checks whether FILE is in the directory.

The FILE includes 'name.pdf'

How to verify, that files name*.pdf are also in the directory?

if [ -f "$FILE" ]; then  # ----> how to add the condition that name*.pdf is also OK
    echo "OK $f"
else 
    echo "!!! Not OK $f"
fi

Upvotes: 0

Views: 106

Answers (3)

Nishant Jain
Nishant Jain

Reputation: 197

You could follow something like below

#!/bin/bash

if [[ $(find . -name "name-*.pdf") ]]; then
        echo "File Exists"
else
        echo "File Doesnt exists"
fi

Upvotes: -1

Leo Lamas
Leo Lamas

Reputation: 198

You can do this:

if [ -f name*.pdf ]; then
    echo "OK $f"
else 
    echo "!!! Not OK $f"
fi

EDIT: as stated in the comments this method won't work if more than one file match, so I've found another way:

name=name*.pdf;
if compgen -G $name > /dev/null; then
    echo "OK $f"
else 
    echo "!!! Not OK $f"
fi

Upvotes: 1

Mehmet Karatay
Mehmet Karatay

Reputation: 297

Does this do what you want?

 # List the files, but stream any output to /dev/null
 # We are only interested in the exit status                   
if ls name*.pdf >/dev/null 2>&1; then 
    echo File matching pattern exist
else
    echo Files matching pattern do not exist
fi

This works because if is checking the exit status of the ls command. This is exactly how if [ 'some condition' ] works, which is a shortcut for if test 'some condition': if is checking the exit status of test. ls has an exit status of 0 if it finds files, otherwise it's 1 or 2 both of which if will evaluate as false.

If you want a more general solution, you can define the prefix and extension as variables:

prefix='name' #You can define the prefix and extension as variables
ext='pdf'

if $prefix*.$ext >/dev/null 2>&1; then
#the rest of the code is the same as earlier.

Upvotes: 1

Related Questions