GETPT(3) Linux Programmer's Manual GETPT(3)NAMEgetpt - open the pseudo-terminal master (PTM)
SYNOPSIS
#define _GNU_SOURCE
#include <stdlib.h>
int getpt(void);
DESCRIPTIONgetpt() 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 VALUEgetpt() returns an open file descriptor upon successful completion.
Otherwise, it returns -1 and sets errno to indicate the error.
ERRORSgetpt() can fail with various errors described in open(2).
VERSIONSgetpt() is provided in glibc since version 2.1.
CONFORMING TOgetpt() is glibc-specific; use posix_openpt(3) instead.
SEE ALSOgrantpt(3), posix_openpt(3), ptsname(3), unlockpt(3), ptmx(4), pty(7)COLOPHON
This page is part of release 3.15 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)