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- Newsgroups: comp.unix.sys5.r3
- Path: sparky!uunet!gatech!darwin.sura.net!spool.mu.edu!agate!ames!pacbell.com!att-out!cbfsb!cbnewsb.cb.att.com!mkenny
- From: mkenny@cbnewsb.cb.att.com (michael r..kenny)
- Subject: Re: Can Sys/V force DTR low or high?
- Message-ID: <1992Dec29.165407.13856@cbfsb.cb.att.com>
- Keywords: DTR
- Sender: news@cbfsb.cb.att.com
- Organization: AT&T
- References: <1406@minya.UUCP> <1992Dec28.201017.29140@hfsi.uucp>
- Distribution: usa
- Date: Tue, 29 Dec 1992 16:54:07 GMT
- Lines: 25
-
- In article <1992Dec28.201017.29140@hfsi.uucp> ata@hfsi.UUCP (John Ata - FSO) writes:
- >In article <1406@minya.UUCP> jcsu@minya.UUCP (John Chambers) writes:
- >>The subject is probably self-explanatory. On BSD-like systems, you can
- >>make a call of:
- >> ioctl(dev,TIOCCDTR,0L);
- >>and DTR will instantly drop, telling a (sane ;-) modem to hang up.
- >>I've poked around in TFM for several Sys/V releases (both R3 and R4),
- >>and as near as I can tell, there is no (documented) equivalent of this
- >>operation in Sys/V.
- >
- >Doesn't setting the baud rate to 0 drop DTR on SysVR3?
- >--
- >John G. Ata - Technical Consultant | Internet: ata@hfsi.com
- >HFS, Inc. VA20 | UUCP: uunet!hfsi!ata
- >7900 Westpark Drive MS:601 | Voice: (703) 827-6810
- >McLean, VA 22102 | FAX: (703) 827-3729
-
- Yes, and it is vaguely documented in Termio(7) of the administrators
- reference manual. Does anybody know how to bring it back up without
- closing and re-opening the port? Restoring the initial settings doesn't
- do it for me.
-
- Mike Kenny
-
-
-