getpt
Section: C Library Functions (3)
Updated: 2022-12-15
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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).
VERSIONS
getpt()
is provided since glibc 2.1.
ATTRIBUTES
For an explanation of the terms used in this section, see
attributes(7).
| Interface | Attribute | Value
|
|
getpt()
| Thread safety | MT-Safe
|
STANDARDS
getpt()
is glibc-specific;
use
posix_openpt(3)
instead.
SEE ALSO
grantpt(3),
posix_openpt(3),
ptsname(3),
unlockpt(3),
ptmx(4),
pty(7)
Index
- NAME
-
- LIBRARY
-
- SYNOPSIS
-
- DESCRIPTION
-
- RETURN VALUE
-
- ERRORS
-
- VERSIONS
-
- ATTRIBUTES
-
- STANDARDS
-
- SEE ALSO
-
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