06-10-2004
Some reasons I like it are
- security
- programming
- flexibilty
- stable
- easy to tweak and change
- can make my own distro if I want
That's just a few of the reasons. Also the support for Linux/UNIX is great. Yeah sure there isn't some helpdesk like Winblows has though that many around teh world use Linux/UNIX and most are willing to help each other out
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LEARN ABOUT MINIX
posix_openpt
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 device, returning a file descriptor that can be used to refer to that
device.
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
returned, 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 attributes(7).
+---------------+---------------+---------+
|Interface | Attribute | Value |
+---------------+---------------+---------+
|posix_openpt() | 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 4.15 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)