The OpenNET Project / Index page

[ новости /+++ | форум | теги | ]

Интерактивная система просмотра системных руководств (man-ов)

 ТемаНаборКатегория 
 
 [Cписок руководств | Печать]

openpty (3)
  • openpty (3) ( FreeBSD man: Библиотечные вызовы )
  • openpty (3) ( Русские man: Библиотечные вызовы )
  • >> openpty (3) ( Linux man: Библиотечные вызовы )
  •  

    NAME

    openpty, login_tty, forkpty - tty utility functions
     
    

    SYNOPSIS

    #include <pty.h>
    
    int openpty(int *amaster, int *aslave, char *name,
                struct termios *termp, struct winsize *winp);
    
    pid_t forkpty(int *amaster, char *name, struct termios *termp,
                  struct winsize *winp);
    
    #include <utmp.h>
    
    int login_tty(int fd);
    
    Link with -lutil.
    
     

    DESCRIPTION

    The openpty() function finds an available pseudo-terminal and returns file descriptors for the master and slave in amaster and aslave. If name is not NULL, the filename of the slave is returned in name. If termp is not NULL, the terminal parameters of the slave will be set to the values in termp. If winp is not NULL, the window size of the slave will be set to the values in winp.

    The login_tty() function prepares for a login on the tty fd (which may be a real tty device, or the slave of a pseudo-terminal as returned by openpty()) by creating a new session, making fd the controlling terminal for the calling process, setting fd to be the standard input, output, and error streams of the current process, and closing fd.

    The forkpty() function combines openpty(), fork(2), and login_tty() to create a new process operating in a pseudo-terminal. The file descriptor of the master side of the pseudo-terminal is returned in amaster, and the filename of the slave in name if it is not NULL. The termp and winp arguments, if not NULL, will determine the terminal attributes and window size of the slave side of the pseudo-terminal.  

    RETURN VALUE

    If a call to openpty(), login_tty(), or forkpty() is not successful, -1 is returned and errno is set to indicate the error. Otherwise, openpty(), login_tty(), and the child process of forkpty() return 0, and the parent process of forkpty() returns the process ID of the child process.  

    ERRORS

    openpty() will fail if:
    ENOENT
    There are no available ttys.

    login_tty() will fail if ioctl(2) fails to set fd to the controlling terminal of the calling process.

    forkpty() will fail if either openpty() or fork(2) fails.  

    CONFORMING TO

    These are BSD functions, present in libc5 and glibc2.  

    NOTES

    In versions of glibc before 2.0.92, openpty() returns file descriptors for a BSD pseudo-terminal pair; since glibc 2.0.92, it first attempts to open a Unix 98 pseudo-terminal pair, and falls back to opening a BSD pseudo-terminal pair if that fails.  

    BUGS

    Nobody knows how much space should be reserved for name. So, calling openpty() or forkpty() with non-NULL name may not be secure.  

    SEE ALSO

    fork(2), ttyname(3), pty(7)  

    COLOPHON

    This page is part of release 3.14 of the Linux man-pages project. A description of the project, and information about reporting bugs, can be found at http://www.kernel.org/doc/man-pages/.


     

    Index

    NAME
    SYNOPSIS
    DESCRIPTION
    RETURN VALUE
    ERRORS
    CONFORMING TO
    NOTES
    BUGS
    SEE ALSO
    COLOPHON


    Поиск по тексту MAN-ов: 




    Партнёры:
    PostgresPro
    Inferno Solutions
    Hosting by Hoster.ru
    Хостинг:

    Закладки на сайте
    Проследить за страницей
    Created 1996-2024 by Maxim Chirkov
    Добавить, Поддержать, Вебмастеру