Date: Tue, 13 Feb 1996 16:46:32 +1030 (CST) From: Michael Smith <msmith@atrad.adelaide.edu.au> To: hackers@freebsd.org Subject: device driver ioctl for nonblocking IO? Message-ID: <199602130616.QAA10056@genesis.atrad.adelaide.edu.au>
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I've got a really stupid one here... In a device driver I'm writing, I'd like to support nonblocking I/O. If I open an fd on the device and fcntl(fd, F_SETFL, O_NONBLOCK), I get a mystery ioctl sent to my device. The question is : what is it? I haven't been able to find an example where this is done anywhere else (*grumble*), so I'm left a little puzzled. Any ideas? -- ]] Mike Smith, Software Engineer msmith@atrad.adelaide.edu.au [[ ]] Genesis Software genesis@atrad.adelaide.edu.au [[ ]] High-speed data acquisition and (GSM mobile) 0411-222-496 [[ ]] realtime instrument control (ph/fax) +61-8-267-3039 [[ ]] Collector of old Unix hardware. "I seek PEZ!" - The Tick [[
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