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-terminated 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  attri-
     butes:

     ____________________________________________________________
    |       ATTRIBUTE TYPE        |       ATTRIBUTE VALUE       |
    |_____________________________|_____________________________|
    | MT-Level                    | Safe                        |
    |_____________________________|_____________________________|

SEE ALSO

     open(2),  grantpt(3C),  ttyname(3C),  unlockpt(3C),   attri-
     butes(5)

     STREAMS Programming Guide