osf1 man page for ptsname

ptsname(3)						     Library Functions Manual							ptsname(3)

NAME
       ptsname, ptsname_r - Gets the name of a slave pseudoterminal device

LIBRARY
       Standard C Library (libc)

SYNOPSIS
       #include <stdlib.h>

       char *ptsname(	   int masterfd);

       The  following  function is not defined in current industry standards and is supported only for backward compatibility.	You should not use
       it in new designs.

       int ptsname_r(	   int masterfd,      char *slavename,	    int len);

STANDARDS
       Interfaces documented on this reference page conform to industry standards as follows:

       ptsname(): XSH5.0

       Refer to the standards(5) reference page for more information about industry standards and associated tags.

PARAMETERS
       Specifies a file descriptor that is returned from a successful open of the master pty.  Points to the character	array  for  the  resulting
       null-terminated pathname of the slave pty.  Specifies the length of the slave pty specified by slavename.  This length must be 32 bytes.

DESCRIPTION
       The ptsname() function returns the name of the slave pseudoterminal device associated with a master pseudoterminal device.

NOTES
       The  ptsname()  function  returns a pointer to thread-specific data.  Subsequent calls to this function from the same thread overwrite this
       data.

       [Tru64 UNIX]  The ptsname_r() function is an obsolete reentrant version of the ptsname() function.  It is supported in  order  to  maintain
       backward compatibility with previous versions of the operating system and should not be used in new designs.

RETURN VALUES
       Upon  successful  completion,  the  ptsname() function returns a pointer to a string that contains the pathname of the slave pseudoterminal
       device.	The pathname has the form: /dev/pts /N.  Upon failure, it returns a null pointer.  The function can fail if the masterfd parameter
       is an invalid file descriptor or if the slave device name does not exist in the file system.

       [Tru64  UNIX]  Upon successful completion, the ptsname_r() function stores a the string in slavename and returns a value of 0 (zero).  Upon
       failure, it returns a value of -1 and may place an appropriate value in the errno variable.

ERRORS
       If the following conditions occur, the ptsname_r() function sets errno to the following value: [Tru64  UNIX]  The  slavename  parameter	is
       invalid or the len parameter is too small.

RELATED INFORMATION
       Functions: openpty(3), pty(7)

       Standards: standards(5) delim off

																	ptsname(3)