getpt - Man Page

Standard C library (libc, -lc)

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

int getpt(void);

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.

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

getpt() can fail with various errors described in open(2).

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

Use posix_openpt(3) instead.

GNU.

glibc 2.1.

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

posix_openpt(3), pts(4).