PERL fcntl Function

Syntax

Definition and Usage

The Perl version of the system fcntl( ) function. Performs the function specified by FUNCTION, using SCALAR on FILEHANDLE. SCALAR either contains a value to be used by the function or is the location of any returned information.

Return Value

• 0 but true if the return value from the fcntl()is 0 Value returned by system.

• undef on failure

Example

Following are the usage...

    use Fcntl;
    fcntl($filehandle, F_GETFL, $packed_return_buffer)
	or die "can't fcntl F_GETFL: $!";