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?
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;