modbackchannel;modmonitor;modparent;modpipe;pub(super)useparent::exec_pty;usecrate::system::signal::SignalNumber;/// Continue running in the foreground
pub(super)constSIGCONT_FG: SignalNumber =-2;/// Continue running in the background
pub(super)constSIGCONT_BG: SignalNumber =-3;