Reference: open2

open2

open2 (\*rdr, \*wtr, cmd_with_args)

Forks a child process to execute the specified command. Takes the following arguments:

\*rdr

Represents a read filehandle that your program can use to read from the command $cmd's standard output. Can be a FileHandle object or a reference to a typeglob.

\*wtr

Represents a write filehandle that your program can use to write to the command $cmd's standard input. Can be a FileHandle object or a reference to a typeglob.

cmd_with_arguments

The command to be executed by the child process, and its arguments. Can be specified two ways:

$cmd_with_args
$cmd, "arg1", "arg2", ...