Date: Mon, 3 Feb 1997 15:16:33 -0800 (PST) From: John-Mark Gurney <jmg@nike.efn.org> To: Troy Curtiss <troyc@sandy.merix.com> Cc: freebsd-hackers@freebsd.org Subject: Re: Two-way pipe possible without C/perl? Message-ID: <Pine.NEB.3.95.970203151149.27974E-100000@hydrogen.nike.efn.org> In-Reply-To: <troyc-9701032246.AA0002700@sandy>
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On Mon, 3 Feb 1997, Troy Curtiss wrote: > Hi, > I am looking for a very quick and dirty way to have my FreeBSD > box page me when certain systems go down at work. The easiest way > I can think of is to create a 2-way pipe between a chat command and > the cu command. Something like: > > chat " '' ATZ OK ATDT1800PAGER# CONNECT 'PIN12345' Sent ATH" <-> > cu -l /dev/cuaa0 -s 300 > > in a shell script or etc... Is there a shell (sh, csh, tcsh, bash) > mechanism to wire process A's stdin to process B's stdout, and vice- > versa, or am I going to have to use perl/expect/C (more time-consuming)? > No big deal, but if anybody has a good idea, I'd appreciate it. why not just do something like this: chat -f file < /dev/cuaa0 > /dev/cuaa0 and if you need uucp locking do something like this: if shlock -p $$ -f /var/log/LCK.ttyd0; then chat -f file < /dev/cuaa0 > /dev/cuaa0 else echo someone else has the modem fi hope this helps... John-Mark gurney_j@efn.org http://resnet.uoregon.edu/~gurney_j/ Modem/FAX: (541) 683-6954 (FreeBSD Box) Live in Peace, destroy Micro$oft, support free software, run FreeBSD (unix)
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