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   libexpect    ( 3 )

библиотека программных диалогов с интерактивными программами (programmed dialogue library with interactive programs)

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.