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From: Robert Watson <rwatson@FreeBSD.org>
Date: Thu, 15 Sep 2005 20:53:56 +0000 (UTC)
To: src-committers@FreeBSD.org, cvs-src@FreeBSD.org, cvs-all@FreeBSD.org
X-FreeBSD-CVS-Branch: RELENG_6
Cc: 
Subject: cvs commit: src/sys/fs/fifofs fifo_vnops.c
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rwatson     2005-09-15 20:53:56 UTC

  FreeBSD src repository

  Modified files:        (Branch: RELENG_6)
    sys/fs/fifofs        fifo_vnops.c 
  Log:
  Merge fifo_vnops.c:1.121 from HEAD to RELENG_6:
  
    Introduce no-op nosup fifo kqueue filter and detach routine, which are
    used when a read filter is requested on a write-only fifo descriptor, or
    a write filter is requested on a read-only fifo descriptor.  This
    permits the filters to be registered, but never raises the event, which
    causes kqueue behavior for fifos to more closely match similar semantics
    for poll and select, which permit testing for the condition even though
    the condition will never be raised, and is consistent with POSIX's notion
    that a fifo has identical semantics to a one-way IPC channel created
    using pipe() on most operating systems.
  
    The fifo regression test suite can now run to completion on HEAD without
    errors.
  
  Approved by:    re (kensmith)
  
  Revision   Changes    Path
  1.113.2.8  +33 -1     src/sys/fs/fifofs/fifo_vnops.c