To know if a variable is a file handler

[Luis Angel Fdez. Fdez.]

Hi!

I was looking in Google and I don't find anything that solves my
doubt. Is there any way I can check if a variable is an file handler
of an opened file?.

Thanks in advance.

Bye!

 

[Sisyphus]

Hi!

I was looking in Google and I don't find anything that solves my
doubt. Is there any way I can check if a variable is an file handler
of an opened file?.

Thanks in advance.

# Untested
use warnings;
use strict;
use FileHandle::Fmode qwall);
my $fh;
# (optionally) other code that does stuff
if is_arg_ok($fh) {print "\$fh is a file handle to an open file"}
else {print "\$fh is NOT a file handle to an open file"}
__END__

Cheers,
Rob

 

[John W. Krahn]

I was looking in Google and I don't find anything that solves my
doubt. Is there any way I can check if a variable is an file handler
of an opened file?.

perldoc -f fileno


John