Just let the filehandle get closed when you're done with it.

The easiest way is to use a module like IO::File, and either undefine the filehandle when you're finished writing to it, or have it close automatically when it goes out of scope.

Here's one way (going out of scope):

use strict;
use warnings;
use IO::File;

# Create a new filehandle, and write to 'file.txt'
my $fname = "file.txt";
{
    my $fh = new IO::File($fname, ">");
    print $fh "Here's a single line of text\n";

    # Close the file once the user types [RETURN]
    print "Type [RETURN] to close file ...\n";
    <STDIN>;
}   # When this block ends, the enclose "scope" ends, and $fh is delet
+ed

print "Go check whether '$fname' was created (from a separate process)
+ ...\n";

while (1) {
    sleep 3;
    print "Still here... (type ^C when finished)\n";
}
[download]

And here's another (explicit deletion using undef) ...

use strict;
use warnings;
use IO::File;

# Create a new filehandle, and write to 'file.txt'
my $fname = "file.txt";
my $fh = new IO::File($fname, ">");
print $fh "Here's a single line of text\n";

# Close the file once the user types [RETURN]
print "Type [RETURN] to close file ...\n";
<STDIN>;
undef $fh;        # Undefine the filehandle and it will close automati
+cally

print "Go check whether '$fname' was created (from a separate process)
+ ...\n";

while (1) {
    sleep 3;
    print "Still here... (type ^C when finished)\n";
}
[download]