GETPT(3) Linux Programmer's Manual GETPT(3)NAMEgetpt - open the pseudoterminal master (PTM)
SYNOPSIS
#define _GNU_SOURCE /* See feature_test_macros(7) */
#include <stdlib.h>
int getpt(void);
DESCRIPTIONgetpt() opens a pseudoterminal master and returns its file descriptor.
It is equivalent to
open(/dev/ptmx, O_RDWR | O_NOCTTY);
on Linux systems, though the pseudoterminal master is located elsewhere
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.
ATTRIBUTES
For an explanation of the terms used in this section, see
attributes(7).
┌──────────┬───────────────┬─────────┐
│Interface │ Attribute │ Value │
├──────────┼───────────────┼─────────┤
│getpt() │ Thread safety │ MT-Safe │
└──────────┴───────────────┴─────────┘
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 4.14 of the Linux man-pages project. A
description of the project, information about reporting bugs, and the
latest version of this page, can be found at
https://www.kernel.org/doc/man-pages/.
GNU 2015-03-02 GETPT(3)
