COTSE - Expect Reference

When a process is started by spawn, the variable spawn_id is set to a descriptor referring to that process. The variable spawn_out(slave,name) is set to the name of the pty slave device.

The process described by spawn_id is considered the current process. spawn_id may be read or written, in effect providing job control.

user_spawn_id is a global variable containing a descriptor which refers to the user. For example, when spawn_id is set to this value, expect behaves like expect_user.

error_spawn_id is a global variable containing a descriptor which refers to the standard error. For example, when spawn_id is set to this value, send behaves like send_error.

tty_spawn_id is a global variable containing a descriptor which refers to /dev/tty. If /dev/tty does not exist (such as in a cron, at, or batch script), then tty_spawn_id is not defined.


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