Bash: How to check if a zip file contain a specified path/file.ext?

Question

I've to handle 46 .zip file according to their internal structure.

The first usefull check to branch the elaboration is check if a specific file is presente in the .zip.

Actually i'm unzipping and testing the existence of unzipped file.

But, I ask you, is there a way to check if a file is inside a zip file without extract it entirely, using only bash commands?

Answer 1

To check for specific file, you can combine unzip -l with grep to search for that file. The command will look something like this

unzip -l archive.zip | grep -q name_of_file && echo $?

What this does is it lists all files in archive.zip, pipes them to grep which searches for name_of_file. grep exits with exit code 0 if it has find a match. -q silences the output of grep and exits immediatelly with exit code 0 when it finds a match. The echo $? will print the exit code of grep. If you want to use it in if statement, your bash script would look like this:

unzip -l archive.zip | grep -q name_of_file;
if [ "$?" == "0" ]
then
    ...
fi;

Answer 2

on command-line you can try:

$ if [[ `unzip -Z1 audio.zip | grep help.mp3` ]];then echo 'yes';fi

if the help.mp3 is found the output would be yes

see:

help [[  

on bash