Xref: utzoo comp.sys.att:5712 comp.unix.questions:11975
Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!uflorida!haven!aplcen!jhunix!ecf_hap
From: ecf_hap@jhunix.HCF.JHU.EDU (Andrew Poling)
Newsgroups: comp.sys.att,comp.unix.questions
Subject: Uses of read MIN time (Was: termio under SysV (kbdhit() and getch()))
Summary: polling, long reads
Keywords: timeout on reads, polling, etc.
Message-ID: <939@jhunix.HCF.JHU.EDU>
Date: 2 Mar 89 15:16:34 GMT
Expires: 2 Apr 89 00:00:00 GMT
References: <1174@naucse.UUCP> <1182@naucse.UUCP>
Reply-To: ecf_hap@jhunix.UUCP (Andrew Poling)
Followup-To: comp.sys.att
Distribution: usa
Organization: The Johns Hopkins University - HCF
Lines: 29

In article <1182@naucse.UUCP> jdc@naucse.UUCP (John Campbell) writes:
>
>It turns out I misread the documentation.  Unlike another (to remain
>unamed) operating system I use, the MIN time is not the timeout value
>of the read, but rather the required number of 1/10 seconds the read
>must take!  Anyone want to tell me how useful this is?

I've used a MIN value of 0 to effect painless polling.  You can also put
the timing wait for a loop here instead - that way you spend what
would be "wasted" time watching the input.


>Thanks to all, patience requested of some, for who knows who else might be
>as confused as I appear to be?

Confused?...by System V?...Nah!   :-)



Andy
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