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   libexpect    ( 3 )

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SLAVE CONTROL

void
       exp_slave_control(fd,enable)
       int fd;
       int enable;

       Pty trapping is normally done automatically by the expect
       functions.  However, if you want to issue an ioctl, for example,
       directly on the slave device, you should temporary disable
       trapping.

       Pty trapping can be controlled with exp_slave_control.  The first
       argument is the file descriptor corresponding to the spawned
       process.  The second argument is a 0 if trapping is to be
       disabled and 1 if it is to be enabled.