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Subject: [Bug 199472] Add extra hints to ftruncate.2
Date: Mon, 04 May 2015 14:47:45 +0000
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=199472

--- Comment #1 from commit-hook@freebsd.org ---
A commit references this bug:

Author: jhb
Date: Mon May  4 14:47:00 UTC 2015
New revision: 282417
URL: https://svnweb.freebsd.org/changeset/base/282417

Log:
  Various updates to the ftruncate(2) documentation:
  - Note that ftruncate(2) can operate on shared memory objects and cross
    reference shm_open(2).
  - Note that ftruncate(2) does not change the file position pointer (aka
    seek pointer) of the file descriptor.
  - ftruncate(2) will fail with EINVAL for all sorts of other fd types than
    just sockets, so instead note that it fails for all but regular files and
    shared memory objects.
  - Note that ftruncate(2) also appeared in 4.2BSD along with truncate(2).
    (Or at least the manpage for both appeared in 4.2, I did not check the
    kernel code itself to see if either predated 4.2.)

  PR:        199472 (2)
  Submitted by:    andrew@ugh.net.au (2)
  MFC after:    1 week

Changes:
  head/lib/libc/sys/truncate.2

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