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 3.23 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/.

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