These pages have the odd wording 'the external variable errno',
which does not occur in other pages. Make these pages conform with
the norm.
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
Since a successful call to
.BR getpriority ()
can legitimately return the value \-1, it is necessary
-to clear the external variable
+to clear
.I errno
prior to the
call, then check
If no messages are available at the socket, the receive calls wait for a
message to arrive, unless the socket is nonblocking (see
.BR fcntl (2)),
-in which case the value \-1 is returned and the external variable
+in which case the value \-1 is returned and
.I errno
is set to
.BR EAGAIN " or " EWOULDBLOCK .
.PP
If all the members of the hierarchy have been returned,
.BR fts_read ()
-returns
-NULL
-and sets the external variable
+returns NULL and sets
.I errno
to 0.
If an error unrelated to a file in the hierarchy occurs,