The following perl script will list every file listed in the specified directory.

opendir(DIR, "/path/to/directory") or die "cannot open directory";
@files = readdir(DIR);
closedir DIR;

print "@files \n";

Only list certain files (grep)

Grep can be used to only list certain files in the directory. In this example, only txt files will be printed.

opendir(DIR, "/path/to/directory") or die "cannot open directory";
@files = grep {/.txt/} readdir(DIR);
closedir DIR;

print "@files \n";

Exclude hidden files

To exclude hidden files, you want to exclude files that begin with a period. To do this, use grep with a regular expression to not list files that begin with a period.

opendir(DIR, "/path/to/directory") or die "cannot open directory";
@files = grep {!/\./} readdir(DIR);
closedir DIR;

print "@files \n";