ptsname(3) [netbsd man page]

PTSNAME(3)						   BSD Library Functions Manual 						PTSNAME(3)

NAME

     ptsname -- get the pathname of the slave pseudo-terminal device

LIBRARY

     Standard C Library (libc, -lc)

SYNOPSIS

     #include <stdlib.h>

     char *
     ptsname(int masterfd);

DESCRIPTION

     The ptsname() function returns the pathname of the slave pseudo-terminal device that corresponds to the master pseudo-terminal device associ-
     ated with masterfd.  The ptsname() function is not reentrant or thread-safe.

RETURN VALUES

     If successful, ptsname() returns a pointer to a nul-terminated string containing the pathname of the slave pseudo-terminal device.  If an
     error occurs ptsname() will return NULL and errno is set to indicate the error.

ERRORS

     The ptsname() function will fail if:

     [EACCESS]		the corresponding pseudo-terminal device could not be accessed.

     [EBADF]		masterfd is not a valid descriptor.

     [EINVAL]		masterfd is not associated with a master pseudo-terminal device.

NOTES

     The error returns of ptsname() are a NetBSD extension.  The ptsname() function is equivalent to:

	     struct ptmget pm;
	     return ioctl(masterfd, TIOCPTSNAME, &pm) == -1 ? NULL : pm.ps;

SEE ALSO

     ioctl(2), grantpt(3), posix_openpt(3), unlockpt(3)

STANDARDS

     The ptsname() function conforms to IEEE Std 1003.1-2001 (``POSIX.1'').  Its first release was in X/Open Portability Guide Issue 4, Version 2
     (``XPG4.2'').

BSD
								   May 25, 2004 							       BSD

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 5.10							    14 Aug 2002 						       ptsname(3C)