.SS Portability notes
On some systems (but not Linux), pipes are bidirectional:
data can be transmitted in both directions between the pipe ends.
-According to POSIX.1-2001, pipes only need to be unidirectional.
+According to POSIX.1-2001, pipes need only need be unidirectional.
Portable applications should avoid reliance on
bidirectional pipe semantics.
.SH SEE ALSO
.BR epoll (7),
.BR fifo (7)
.SH COLOPHON
-This page is part of release 3.78 of the Linux
+This page is part of release 3.79 of the Linux
.I man-pages
project.
A description of the project,