What is Opendir in Perl?

Description. This function opens the directory EXPR, associating it with DIRHANDLE for processing, using the readdir function.

How do I read a directory in Perl?

To open a directory in Perl a short function opendir DIRHANDLE, PATH is used. The PATH here is the path of the directory to be opened. Reading a directory is a common task as one has to every time read what is stored in the files to run the code or to understand the code. To read a directory, readdir DIRHANDLE is used.

How do I list a directory in Perl?

If you want to get content of given directory, and only it (i.e. no subdirectories), the best way is to use opendir/readdir/closedir: opendir my $dir, “/some/path” or die “Cannot open directory: $!”; my @files = readdir $dir; closedir $dir; You can also use: my @files = glob( $dir .

What does the opendir function do in Perl?

Perl provides the opendir function for this. It has a slightly strange syntax, similarly to the open function but it only accepts two parameters: the first one is the not-yet defined variable that will hold the directory handle, the second is the relative or absolute path to the directory.

How to read the content of a directory in Perl?

If we would like to know the list of file and other things in a given directory we could use the external ls command, but that would make our code platform dependent – Windows has the dir command for directory listing – and it would create an an unnecessary execution of an outside command. Instead of that Perl provide two alternatives.

How does opendir return the next entry in a directory?

Returns the next directory entry for a directory opened by opendir. If used in list context, returns all the rest of the entries in the directory. If there are no more entries, returns the undefined value in scalar context and the empty list in list context.

How can I call a shell command in my Perl script?

Using backticks or qx// The backtick operator and it’s equivalent qx// excute the command and options inside the operator and return that commands output to STDOUT when it finishes. There are also ways to run external applications through creative use of open, but this is advanced use; read the documentation for more.

https://www.youtube.com/watch?v=vbAfIGR_5XM