NAME
getpt - open the pseudo-terminal master (PTM)
SYNOPSIS
#define _GNU_SOURCE
#include <stdlib.h>
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
elsewhere 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 3.24 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/.