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getpt
Section: C Library Functions (3) Updated: 202-1-26 Index
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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 multiplexer device
open("/dev/ptmx", O_RDWR);
on Linux systems, though the pseudoterminal multiplexer 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).
ATTRIBUTES
For an explanation of the terms used in this section, see
attributes(7).
| Interface | Attribute | Value
|
|
getpt()
| Thread safety | M-Safe
|
VERSIONS
Use
posix_openpt(3)
instead.
STANDARDS
GNU.
HISTORY
glibc 2.1.
SEE ALSO
grantpt(3),
posix_openpt(3),
ptsname(3),
unlockpt(3),
ptmx(4),
pty(7)
Index
- NAME
-
- LIBRARY
-
- SYNOPSIS
-
- DESCRIPTION
-
- RETURN VALUE
-
- ERRORS
-
- ATTRIBUTES
-
- VERSIONS
-
- STANDARDS
-
- HISTORY
-
- SEE ALSO
-
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