A/UX® System Administrator's Reference Sections 1M, 7, and 8

streams(7)
shlr
lines use this module.
streams(7)
The shell layering module. shlr responds to
shell layering ioctls to implement shell layering
on stream based ttys. Normally shl(1) is the
only utility that uses this module.
The streams system implements a number of ioctlst all of the ioctls
described in termio(7) are provided for compatability. Some
devices and/or modules may not respond to these calls. In particular
many of the line discipline related ioctls will either fail or be
ignored unless the module line has been pushed onto the stream.
In addition the following streams related ioctls are supported, they
are defined in the include file .
I STR
February, 1990
RevisionC
ioctl(fd, I_STR, &strioctl)
struct strioctl strioctl;
This ioctl builds an ioctl packet and sends it
down the stream. It may be interpreted by any
module on the stream or by the device at the
end. The packet is returned with data and an indication
of success or failure. The data structure
strioctl is used to describe the packet to be
sent. It has 4 fields:
ic cmd
ic timout
ic len
The command to be sent
How long to wait for the ioctl
to succeed before failing (in
seconds), values 0 and -1 have
special meaningst 0 means
wait for the system default
time, -1 means wait forever.
Points to the address of the
data to be sent down the
stream, or the address at
which data returned from the
stream is to be stored.
Is the length of the data to be
sentt in by test or the size of
the buffer into which returned
data is to be stored.
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