Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
.SH DESCRIPTION
The
.BR ioctl ()
-function manipulates the underlying device parameters of special files.
+system call manipulates the underlying device parameters of special files.
In particular, many operating characteristics of character special files
(e.g., terminals) may be controlled with
.BR ioctl ()
calls.
The
.BR ioctl ()
-function call appeared in Version 7 AT&T UNIX.
+system call appeared in Version 7 AT&T UNIX.
.SH NOTES
In order to use this call, one needs an open file descriptor.
Often the