Technical data

SunOS 5.5 Devices asy(7D)
IOCTLS The standard set of termio ioctl() calls are supported by asy.
Breaks can be generated by the TCSBRK, TIOCSBRK, andTIOCCBRK ioctl() calls.
The input and output line speeds may be set to any of the speeds supported by termio.
The speeds cannot be set independently; when the output speed is set, the input speed is
set to the same speed.
ERRORS An open() will fail if:
ENXIO The unit being opened does not exist.
EBUSY The dial-out device is beingopened and the dial-in device is already
open, or the dial-in device is being opened with a no-delay open and the
dial-out device is already open.
EBUSY The unit has been marked as exclusive-use by another process with a
TIOCEXCL ioctl( ) call.
EINTR The open was interrupted by the delivery of a signal.
FILES /dev/tty[00-03] hardwired tty lines
/dev/ttyd[0-3] dial-in tty lines
/dev/cua[0-3] dial-out tty lines
/kernel/drv/asy.conf asy configuration file.
SEE ALSO tip(1), uucp(1C), ldterm(7M), termio(7I), ttcompat(7M)
DIAGNOSTICS asyn : silo overflow.
The hardware overrun occurred before the input character could be serviced.
asyn : ring buffer overflow.
The driver’s character input ring buffer overflowed before it could be serviced.
modified 24 May 1995 7D-21