SYNOPSIS

#define _GNU_SOURCE /* See feature_test_macros(7) */
#include <stdlib.h>

---

int getpt(void);

DESCRIPTION

getpt() 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 VALUE

getpt() returns an open file descriptor upon successful completion. Otherwise, it returns -1 and sets errno to indicate the error.

VERSIONS

getpt() 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 TO

getpt() is glibc-specific; use posix_openpt(3) instead.

COLOPHON

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