AT&T UNIX™PC Unix System V Users Manual - tenox

XT(7)
JAGENT
XT(7)
may return the error code EIO if the system clist is
empty.
Send the supplied data as a command packet to
invoke a windowing terminal agent routine, and
return the terminal's response to the calling process.
Invalid except on the file descriptor for channel 0.
See jagent (5). It may return the error code EIO if
the system clist is empty.
The third group of ioctl (2) requests concerns the configuration of xt, and
is described in the header file < sys/xt.h>. The requests are as follows:
XTIOCTYPE Returns the value XTIOCTYPE.
XTIOCLINK Requires an argument that is a structure, xtioclm ,
containing a file descriptor for the file to be multiplexed
and the maximum number of channels
allowed. Invalid except on channel 0. This request
may return one of the following errors:
EINV AL nchtzns has an illegal value.
ENOTTY fd does not describe a real tty (7) device.
ENXIO
EBUSY
linesw is not configured with xt.
An XTIOCLINK request has already
been issued for the channel group.
ENOMEM There is no system memory available
for allocating to the tty (7) structures.
EIO The JTIMOM packet described above
could not be delivered.
layers(!) in the User's Reference Manual.
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