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posix_openpt
Langue: en
Version: 2007-01-08 (fedora - 16/08/07)
Section: 3 (Bibliothèques de fonctions)
NAME
posix_openpt - open a pseudo-terminal deviceSYNOPSIS
#define _XOPEN_SOURCE 600
#include <stdlib.h> #include <fcntl.h> int posix_openpt(int flags);
DESCRIPTION
The posix_openpt() function opens an unused pseudo-terminal 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 non-negative file descriptor which is the lowest numbered unused descriptor. On failure, -1 is returned, and errno is set to indicate the error.ERRORS
See open(2).CONFORMING TO
posix_openpt() is part of the Unix98 pseudo-terminal support (see pts(4)). This function is specified in POSIX.1-2001.NOTES
This function is a recent invention in POSIX. Some Unix implementations that support System V (aka Unix 98) pseudo-terminals don't have this function, but it is easy to implement:int posix_openpt(int flags) { return open("/dev/ptmx", flags); }
SEE ALSO
open(2), getpt(3), grantpt(3), ptsname(3), unlock(3), pts(4), feature_test_macros(7), pty(7)Contenus ©2006-2024 Benjamin Poulain
Design ©2006-2024 Maxime Vantorre