opensolaris man page for ptsname

ptsname(3C)						   Standard C Library Functions 					       ptsname(3C)

NAME
       ptsname - get name of the slave pseudo-terminal device

SYNOPSIS
       #include <stdlib.h>

       char *ptsname(int fildes);

DESCRIPTION
       The  ptsname()  function  returns the name of the slave pseudo-terminal device associated with a master pseudo-terminal device. fildes is a
       file descriptor returned from a successful open of the master device. ptsname() returns a pointer to a string  containing  the  null-termi-
       nated path name of the slave device of the form /dev/pts/N, where N is a non-negative integer.

RETURN VALUES
       Upon  successful  completion,  the  function ptsname() returns a pointer to a string which is the name of the pseudo-terminal slave device.
       This value points to a static data area that is overwritten by each call to ptsname(). Upon failure, ptsname()  returns	NULL.  This  could
       occur if fildes is an invalid file descriptor or if  the slave device name does not exist in the file system.

ATTRIBUTES
       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Interface Stability	     |Standard			   |
       +-----------------------------+-----------------------------+
       |MT-Level		     |Safe			   |
       +-----------------------------+-----------------------------+

SEE ALSO
       open(2), grantpt(3C), ttyname(3C), unlockpt(3C), attributes(5), standards(5)

       STREAMS Programming Guide

SunOS 5.11							    14 Aug 2002 						       ptsname(3C)