returns a pointer to a string in static storage which will be
overwritten by subsequent calls.
This pointer must not be freed.
-On failure, a NULL pointer is returned.
+On failure, NULL is returned.
On success,
.BR ptsname_r ()
.BR unlockpt (3),
.BR pts (4),
.BR pty (7)
+.SH COLOPHON
+This page is part of release 3.79 of the Linux
+.I man-pages
+project.
+A description of the project,
+information about reporting bugs,
+and the latest version of this page,
+can be found at
+\%http://www.kernel.org/doc/man\-pages/.