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Man page of GETPT
GETPT
Section: Linux Programmer's Manual (3)
Updated: 2015-03-02
Index
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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.
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
This page is part of release 4.09 of the Linux
man-pages
project.
A description of the project,
information about reporting bugs,
and the latest version of this page,
can be found at
https://www.kernel.org/doc/man-pages/.
Index
- NAME
-
- SYNOPSIS
-
- DESCRIPTION
-
- RETURN VALUE
-
- ERRORS
-
- VERSIONS
-
- ATTRIBUTES
-
- CONFORMING TO
-
- SEE ALSO
-
- COLOPHON
-
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