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From: Ed Schouten <ed@FreeBSD.org>
Date: Fri, 28 Aug 2009 10:25:26 +0000 (UTC)
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X-FreeBSD-CVS-Branch: RELENG_8
Subject: cvs commit: src/lib/libc/stdlib ptsname.3
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ed          2009-08-28 10:25:26 UTC

  FreeBSD src repository

  Modified files:        (Branch: RELENG_8)
    lib/libc/stdlib      ptsname.3 
  Log:
  SVN rev 196614 on 2009-08-28 10:25:26Z by ed
  
  MFC r196508:
    Our implementation of granpt(3) could be valid in the future.
  
    When I wrote the pseudo-terminal driver for the MPSAFE TTY code, Robert
    Watson and I agreed the best way to implement this, would be to let
    posix_openpt() create a pseudo-terminal with proper permissions in place
    and let grantpt() and unlockpt() be no-ops.
  
    This isn't valid behaviour when looking at the spec. Because I thought
    it was an elegant solution, I filed a bug report at the Austin Group
    about this. In their last teleconference, they agreed on this subject.
    This means that future revisions of POSIX may allow grantpt() and
    unlockpt() to be no-ops if an open() on /dev/ptmx (if the implementation
    has such a device) and posix_openpt() already do the right thing.
  
    I'd rather put this in the manpage, because simply mentioning we don't
    comply to any standard makes it look worse than it is. Right now we
    don't, but at least we took care of it.
  
    Approved by:  re (kib)
  
  Revision  Changes    Path
  1.2.2.2   +11 -15    src/lib/libc/stdlib/ptsname.3