You are correct.

my @files = glob('*'); # current directory
print "",join("\n",@files), "\n";
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# Note that these file names do not say whether or not they are directories, a file test is needed. I demo'ed this at Re: Getting a list of directories matching a pattern.

Update: I experimented with Windows 10 command line and found that I could indeed create a directory with a "dot suffix". That surprised me.Having said that, I have never seen such a thing in "real life". By convention, that is just not "the way that this is done". A long time ago, I was forced to use readdir and grep to get file names because of incompatible glob's. For production code, I still use readdir and grep because it will always work. For quick hacks, I am fine with glob().