NAME¶
getpt - open the pseudoterminal master (PTM)
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.
ERRORS¶
getpt() can fail with various errors described in
open(2).
VERSIONS¶
getpt() is provided in glibc since version 2.1.
getpt() is glibc-specific; use
posix_openpt(3) instead.
SEE ALSO¶
grantpt(3),
posix_openpt(3),
ptsname(3),
unlockpt(3),
ptmx(4),
pty(7)
COLOPHON¶
This page is part of release 3.44 of the Linux
man-pages project. A
description of the project, and information about reporting bugs, can be found
at
http://www.kernel.org/doc/man-pages/.