svcadm(8)을 검색하려면 섹션에서 8 을 선택하고, 맨 페이지 이름에 svcadm을 입력하고 검색을 누른다.
posix_openpt(3)
POSIX_OPENPT(3) Linux Programmer's Manual POSIX_OPENPT(3)
NAME
posix_openpt - open a pseudoterminal device
SYNOPSIS
#include <stdlib.h>
#include <fcntl.h>
int posix_openpt(int flags);
Feature Test Macro Requirements for glibc (see feature_test_macros(7)):
posix_openpt(): _XOPEN_SOURCE >= 600
DESCRIPTION
The posix_openpt() function opens an unused pseudoterminal master de‐
vice, returning a file descriptor that can be used to refer to that de‐
vice.
The flags argument is a bit mask that ORs together zero or more of the
following flags:
O_RDWR Open the device for both reading and writing. It is usual to
specify this flag.
O_NOCTTY
Do not make this device the controlling terminal for the
process.
RETURN VALUE
On success, posix_openpt() returns a nonnegative file descriptor which
is the lowest numbered unused file descriptor. On failure, -1 is re‐
turned, and errno is set to indicate the error.
ERRORS
See open(2).
VERSIONS
Glibc support for posix_openpt() has been provided since version 2.2.1.
ATTRIBUTES
For an explanation of the terms used in this section, see attrib‐
utes(7). allbox; lb lb lb l l l. Interface Attribute Value T{
posix_openpt() T} Thread safety MT-Safe
CONFORMING TO
POSIX.1-2001, POSIX.1-2008.
posix_openpt() is part of the UNIX 98 pseudoterminal support (see
pts(4)).
NOTES
Some older UNIX implementations that support System V (aka UNIX 98)
pseudoterminals don't have this function, but it is easy to implement:
int
posix_openpt(int flags)
{
return open("/dev/ptmx", flags);
}
Calling posix_openpt() creates a pathname for the corresponding
pseudoterminal slave device. The pathname of the slave device can be
obtained using ptsname(3). The slave device pathname exists only as
long as the master device is open.
SEE ALSO
open(2), getpt(3), grantpt(3), ptsname(3), unlockpt(3), pts(4), pty(7)
COLOPHON
This page is part of release 5.02 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/.
2017-09-15 POSIX_OPENPT(3)