GETPT(3) Linux Programmer s Manual GETPT(3)

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 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 3.22 of the Linux man-pages project. A description of the project, and information about reporting bugs, can be found at

GNU 2008-06-14 GETPT(3)