DS3100/dc0 support for modem control
Timo Lehtinen
ttl at sti.fi
Mon Jul 23 05:18:23 AEST 1990
The dc(4) man page (in ULTRIX V3.1D) says that the serial line controller
on DECstation 3100 and 2100 only provide partial modem control. Could
anyone enlighten me as to what functionality specifically is missing ?
I'm writing a program which needs to sense whether Carrier Detect is on
and can't figure out how to do it. For instance
ioctl(fd, TIOCWONLINE); /* wait for carrier */
never blocks regardless of whether I have a cable on the port or not.
Is it me or the dc0 ?
Any help much appreciated,
Timo
--
Timo Lehtinen Internet: ttl at sti.fi
Stream Technologies Inc. X.400: C=fi,A=fumail,P=inet,O=sti
Kivihaantie 8 C 25 Phone: +358-0-573161
SF-00310 HELSINKI +358-49-424012
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