Let's use some consistent terminology for this device.
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
.BR getpt ()
opens a new pseudoterminal device and returns a file descriptor
that refers to that device.
-It is equivalent to
+It is equivalent to opening the pseudoterminal multiplexor device
.PP
.in +4n
.EX
.EE
.in
.PP
-on Linux systems, though the pseudoterminal master is located
+on Linux systems, though the pseudoterminal multiplexor device is located
elsewhere on some systems that use the GNU C library.
.SH RETURN VALUE
.BR getpt ()
.SH NOTES
Some older UNIX implementations that support System V
(aka UNIX 98) pseudoterminals don't have this function, but it
-is easy to implement:
+can be easily implemented by opening the pseudoterminal multiplexor device:
.PP
.in +4n
.EX
.SH DESCRIPTION
The file
.I /dev/ptmx
+(the pseudoterminal multiplexor device)
is a character file with major number 5 and
minor number 2, usually with mode 0666 and ownership root:root.
It is used to create a pseudoterminal master and slave pair.