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spawn_id

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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