ptsname(3C)             LIBRARY FUNCTIONS             ptsname(3C)



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

SYNOPSIS
     #include <stdio.h>

     char *ptsname(int fildes);

DESCRIPTION
     The  function  ptsname()  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 an
     integer between 0 and 255.

RETURN VALUE
     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.

SEE ALSO
     open(2), grantpt(3C), ttyname(3C), unlockpt(3C).
     Programmer's Guide: STREAMS.


























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