getpt(3)

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 multiplexor device

    open("/dev/ptmx", O_RDWR);

on Linux systems, though the pseudoterminal multiplexor 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
 | Thread safety | MT-Safe

VERSIONS
Use posix_openpt(3) instead.

STANDARDS
GNU.

HISTORY
glibc 2.1.

SEE ALSO
grantpt(3), posix_openpt(3), ptsname(3), unlockpt(3), ptmx(4), pty(7)