Andrew,
There are no serial ports and hence no /dev/term/b on this system. In fact if
the USB<->RS-232 adapter is not plugged in, there is no /dev/term or /dev/cua
either. Which may explain some of the weirdness when I was setting up the port
as I don't think I had plugged in the Keyspan adapter when I started
configuring it. /dev/{term,cua}/0 don't get created until you plug in the
adapter and disappear when you unplug it.
ttymon holds /dev/term/0, so even root or uucp cannot open /dev/term/0. stty
just hangs until interrupted. Everything I've read suggests that it is not
possible to have a port be outbound only and that is must be bidirectional.
However, I've not attempted to test that. I've got enough annoyance as it is.
However, I can see lots of opportunity for trouble w/ ttymon running on a port
that goes away when the USB-serial adapter is unplugged.
I can open /dev/cua/0 w/ stty, but do not seem to be able to make any changes.
To wit:
root@openindiana:~# /bin/sh
root@openindiana:~# su uucp
root@openindiana:~# stty -a </dev/term/0
^Csu: /dev/term/0: cannot open [Interrupted system call]
root@openindiana:~# stty -a </dev/cua/0
speed 9600 baud; rows 0; columns 0;
intr = ^C; quit = ^\; erase = ^?; kill = ^U; eof = ^D; eol = <undef>;
eol2 = <undef>; swtch = <undef>; start = ^Q; stop = ^S; susp = ^Z; dsusp = ^Y;
rprnt = ^R; werase = ^W; lnext = ^V; flush = ^O;
-parenb -parodd cs8 -hupcl -cstopb cread -clocal -crtscts
-ignbrk brkint -ignpar -parmrk -inpck -istrip -inlcr -igncr icrnl ixon -ixoff
-iuclc -ixany imaxbel
opost -olcuc -ocrnl onlcr -onocr -onlret -ofill -ofdel nl0 cr0 tab3 bs0 vt0 ff0
isig icanon iexten echo echoe echok -echonl -noflsh -xcase -tostop -echoprt
echoctl echoke
root@openindiana:~# stty olcuc </dev/cua/0
root@openindiana:~# stty -a </dev/cua/0
speed 9600 baud; rows 0; columns 0;
intr = ^C; quit = ^\; erase = ^?; kill = ^U; eof = ^D; eol = <undef>;
eol2 = <undef>; swtch = <undef>; start = ^Q; stop = ^S; susp = ^Z; dsusp = ^Y;
rprnt = ^R; werase = ^W; lnext = ^V; flush = ^O;
-parenb -parodd cs8 -hupcl -cstopb cread -clocal -crtscts
-ignbrk brkint -ignpar -parmrk -inpck -istrip -inlcr -igncr icrnl ixon -ixoff
-iuclc -ixany imaxbel
opost -olcuc -ocrnl onlcr -onocr -onlret -ofill -ofdel nl0 cr0 tab3 bs0 vt0 ff0
isig icanon iexten echo echoe echok -echonl -noflsh -xcase -tostop -echoprt
echoctl echoke root@openindiana:~# stty olcuc
</dev/cua/0; stty -a </dev/cua/0
speed 9600 baud; rows 0; columns 0;
intr = ^C; quit = ^\; erase = ^?; kill = ^U; eof = ^D; eol = <undef>;
eol2 = <undef>; swtch = <undef>; start = ^Q; stop = ^S; susp = ^Z; dsusp = ^Y;
rprnt = ^R; werase = ^W; lnext = ^V; flush = ^O;
-parenb -parodd cs8 -hupcl -cstopb cread -clocal -crtscts
-ignbrk brkint -ignpar -parmrk -inpck -istrip -inlcr -igncr icrnl ixon -ixoff
-iuclc -ixany imaxbel
opost -olcuc -ocrnl onlcr -onocr -onlret -ofill -ofdel nl0 cr0 tab3 bs0 vt0 ff0
isig icanon iexten echo echoe echok -echonl -noflsh -xcase -tostop -echoprt
echoctl echoke
Note that attempting to set olcuc on /dev/cua/0 had no apparent effect.
Reg
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