GETPT
Section: Linux Programmer's Manual (3)
Updated: 2020-08-13
Page Index
NAME
getpt - open a new pseudoterminal master
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).
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.
SEE ALSO
grantpt(3),
posix_openpt(3),
ptsname(3),
unlockpt(3),
ptmx(4),
pty(7)
COLOPHON
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man-pages
project.
A description of the project,
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and the latest version of this page,
can be found at
https://www.kernel.org/doc/man-pages/.