npty
npty specifies the maximum number of pseudo-tty data
structures that are available on the system.
1
60
Specify integer value. For more information, see Specifying Parameter Values.
npty limits the number of the following structures that can
be used by the pseudo-teletype driver:
struct tty pt_tty[npty];
struct tty *pt_line[npty];
struct pty_info pty_info[npty];
None.