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PTSNAME(P)			    POSIX Programmer's Manual			       PTSNAME(P)

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

SYNOPSIS
       #include <stdlib.h>

       char *ptsname(int fildes);

DESCRIPTION
       The  ptsname()  function shall return the name of the slave pseudo-terminal device associ-
       ated with a master pseudo-terminal device. The fildes argument is a file  descriptor  that
       refers  to  the	master	device. The ptsname() function shall return a pointer to a string
       containing the pathname of the corresponding slave device.

       The ptsname() function need not be reentrant. A function that is not required to be  reen-
       trant is not required to be thread-safe.

RETURN VALUE
       Upon successful completion, ptsname() shall return a pointer to a string which is the name
       of the pseudo-terminal slave device. Upon failure, ptsname() shall return a null  pointer.
       This  could occur if fildes is an invalid file descriptor or if the slave device name does
       not exist in the file system.

ERRORS
       No errors are defined.

       The following sections are informative.

EXAMPLES
       None.

APPLICATION USAGE
       The value returned may point to a static data area that is overwritten  by  each  call  to
       ptsname().

RATIONALE
       None.

FUTURE DIRECTIONS
       None.

SEE ALSO
       grantpt()   ,   open()  ,  ttyname()  ,	unlockpt()  ,  the  Base  Definitions  volume  of
       IEEE Std 1003.1-2001, <stdlib.h>

COPYRIGHT
       Portions of this text are reprinted and	reproduced  in	electronic  form  from	IEEE  Std
       1003.1,	2003  Edition,	Standard  for Information Technology -- Portable Operating System
       Interface (POSIX), The Open Group Base Specifications Issue 6, Copyright (C) 2001-2003  by
       the  Institute  of  Electrical  and  Electronics Engineers, Inc and The Open Group. In the
       event of any discrepancy between this version and the original IEEE  and  The  Open  Group
       Standard, the original IEEE and The Open Group Standard is the referee document. The orig-
       inal Standard can be obtained online at http://www.opengroup.org/unix/online.html .

IEEE/The Open Group			       2003				       PTSNAME(P)
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