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fcntl.2: Mention memfd_create() in the discussion of file seals 

Give the reader a clue about what kinds of objects can
be employed with file seals.

Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
This commit is contained in:
Michael Kerrisk 2017-03-30 11:20:30 +02:00
parent 547afefe40
commit 69ccc9f11d
1 changed files with 6 additions and 0 deletions
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6
man2/fcntl.2
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@ -1366,6 +1366,12 @@ and some code examples, see
Currently, only the
.BR tmpfs (5)
filesystem supports sealing.
Thus, for example,
file seals can be applied to the file descriptor returned by
.BR memfd_create (2)
(if the
.B MFD_ALLOW_SEALING
was employed).
On other filesystems, all
.BR fcntl ()
operations that operate on seals will return