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8.134. IPC::Open2

Opens a child process that allows two-way communication between your program and the child. Returns the process ID of the child process or reports a fatal error on failure. Exports one function.

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

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


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