may be used to force the block out early.
(See
.BR fclose (3).)
-
+.PP
Normally all files are block buffered.
If a stream refers to a terminal (as
.I stdout
It may set
.I errno
on failure.
-
+.PP
The other functions do not return a value.
.SH ATTRIBUTES
For an explanation of the terms used in this section, see