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

streams(7)
I MNAME
the argument is not valid.
ioetl(fd, I_MNAME, &par)
union {
int depth;
ehar buff[FMNAMESZ+l];
} par;
streams(7)
This ioctl returns the name of the module or
driver at the depth on the stream specified by the
parameter. The stream head is at depth O. The
last module found on the stream will be the
driver.
Note: this ioctl is not necessarily provided on all
systems that provide a stream interface. It
should not be used if program portability is a
factor.
Errors:
EFAULT if the address of the parameter is invalid
EINVAL if the depth is less than 0 or references
a module past the driver at the end of the stream
Terminal Lines
When using a stream based terminal, it is usually necessary to
push a line discipline module onto the stream before use. In almost
all cases this is done by jete/getty or /ete/init
when you log onto your system. When you are opening an unused
terminal line it may then be required. Pushing more than one line
discipline onto a stream should be avoided as the results are
undefined and will not be useful. Two methods are provided to
make pushing line disciplines easier. They both can be used on
non stream based character drivers without any undue effect and
they will avoid the multiple pushing of line disciplines if one is already
pushed.
line push(3) is a library routine that is passed the file descriptor
of and open device (from open(2». It will push a line discipline
onto the device if it is a streaming device and there is not one
pushed already.
February, 1990
Revision C
6