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lib/39244: ioctl(2) doesn't describe domains of ioctl commands

>Number:         39244
>Category:       lib
>Synopsis:       ioctl(2) doesn't describe domains of ioctl commands
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    lib-bug-people
>State:          open
>Class:          doc-bug
>Submitter-Id:   net
>Arrival-Date:   Tue Jul 29 05:25:00 +0000 2008
>Originator:     Aleksej Saushev <>
>Release:        NetBSD 4.99.70
System: NetBSD asau.local 4.99.70 NetBSD 4.99.70 (KERN) #1: Sat Jul 26 00:09:12 
MSD 2008 
Architecture: i386
Machine: i386
        Quoting manual page, "Some generic ioctls are not implemented
        for all types of file descriptors.  These include..."

        It isn't clear from the manual page itself and referenced pages:
        a) which distinct type of file descriptors exist;
        b) which generic ioctl commands apply to which type of descriptors;
        c) where to search for other non-generic commands, if needed.
        Read the manual page.
        Expand manual page, provide more references.

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