The OpenNET Project / Index page

[ новости /+++ | форум | теги | ]

Интерактивная система просмотра системных руководств (man-ов)

 ТемаНаборКатегория 
 
 [Cписок руководств | Печать]

linkat (2)
  • >> linkat (2) ( Linux man: Системные вызовы )
  •  

    NAME

    linkat - create a file link relative to directory file descriptors
     
    

    SYNOPSIS

    #define _ATFILE_SOURCE
    #include <fcntl.h>           /* Definition of AT_* constants */
    #include <unistd.h>
    
    int linkat(int olddirfd, const char *oldpath,
               int newdirfd, const char *newpath, int flags);
    
     

    DESCRIPTION

    The linkat() system call operates in exactly the same way as link(2), except for the differences described in this manual page.

    If the pathname given in oldpath is relative, then it is interpreted relative to the directory referred to by the file descriptor olddirfd (rather than relative to the current working directory of the calling process, as is done by link(2) for a relative pathname).

    If oldpath is relative and olddirfd is the special value AT_FDCWD, then oldpath is interpreted relative to the current working directory of the calling process (like link(2)).

    If oldpath is absolute, then olddirfd is ignored.

    The interpretation of newpath is as for oldpath, except that a relative pathname is interpreted relative to the directory referred to by the file descriptor newdirfd.

    By default, linkat(), does not dereference oldpath if it is a symbolic link (like link(2)). Since Linux 2.6.18, the flag AT_SYMLINK_FOLLOW can be specified in flags to cause oldpath to be dereferenced if it is a symbolic link. Before kernel 2.6.18, the flags argument was unused, and had to be specified as 0.  

    RETURN VALUE

    On success, linkat() returns 0. On error, -1 is returned and errno is set to indicate the error.  

    ERRORS

    The same errors that occur for link(2) can also occur for linkat(). The following additional errors can occur for linkat():
    EBADF
    olddirfd or newdirfd is not a valid file descriptor.
    ENOTDIR
    oldpath is relative and olddirfd is a file descriptor referring to a file other than a directory; or similar for newpath and newdirfd
     

    VERSIONS

    linkat() was added to Linux in kernel 2.6.16.  

    CONFORMING TO

    POSIX.1-2008.  

    NOTES

    See openat(2) for an explanation of the need for linkat().  

    SEE ALSO

    link(2), openat(2), path_resolution(7), symlink(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
    VERSIONS
    CONFORMING TO
    NOTES
    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