GETPT(3)		   Linux Programmers Manual		     GETPT(3)



NAME
       getpt - open the pseudo-terminal master (PTM)

SYNOPSIS
       #define _GNU_SOURCE
       #include 

       int getpt(void);

DESCRIPTION
       getpt() opens a pseudo-terminal master and returns its file descriptor.
       It is equivalent to

	   open(/dev/ptmx, O_RDWR | O_NOCTTY);

       on Linux systems, though the pseudo-terminal master  is	located  else
       where on some systems that use GNU Libc.

RETURN VALUE
       getpt()	returns  an  open  file descriptor upon successful completion.
       Otherwise, it returns -1 and sets errno to indicate the error.

ERRORS
       getpt() can fail with various errors described in open(2).

VERSIONS
       getpt() is provided in glibc since version 2.1.

CONFORMING TO
       getpt() is glibc-specific; use posix_openpt(3) instead.

SEE ALSO
       grantpt(3), posix_openpt(3), ptsname(3), unlockpt(3), ptmx(4), pty(7)

COLOPHON
       This page is part of release 3.05 of the Linux  man-pages  project.   A
       description  of	the project, and information about reporting bugs, can
       be found at http://www.kernel.org/doc/man-pages/.



GNU				  2008-06-14			      GETPT(3)