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getpt

Section: C Library Functions (3)
Updated: 202-1-26
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NAME

getpt - open a new pseudoterminal master

LIBRARY

Standard C library (libc,~-lc)

SYNOPSIS

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

DESCRIPTION

getpt() opens a new pseudoterminal device and returns a file descriptor that refers to that device. It is equivalent to opening the pseudoterminal multiplexer device open("/dev/ptmx", O_RDWR); on Linux systems, though the pseudoterminal multiplexer device is located elsewhere on some systems that use the GNU C library.

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).

ATTRIBUTES

For an explanation of the terms used in this section, see attributes(7).

Interface	Attribute	Value
getpt()	Thread safety	M-Safe

VERSIONS

Use posix_openpt(3) instead.

STANDARDS

GNU.

HISTORY

glibc 2.1.