Asynchronous Serial Communications Programmer's Reference Manual (32022-90052)

78 Chapter3

Common Device Control Functions

Altering Terminal Deﬁceﬁles

Once an AEOR character is designated, any non-binary mode read

issued for that deviceﬁle can be terminated by entry of the AEOR

character, as well as in the normal ways, until the device is closed, or

until the AEOR character is disabled. You can disable the AEOR

character by calling FCONTROL(25) again, using a 0 as the new value

for AEOR.

A read terminated by means of an AEOR does not end normally. A ﬁle

system error is returned, indicating that the AEOR character was used.

The AEOR character is transmitted with the rest of the read data and

is added to the byte count. No carriage return or linefeed is sent to the

terminal. See the discussion of FCONTROL(25) in Chapter 8,

“Intrinsics Reference,” for additional details on this use of the

FCONTROL intrinsic.