The OpenNET Project / Index page

[ новости /+++ | форум | теги | ]

Интерактивная система просмотра системных руководств (man-ов)

 ТемаНаборКатегория 
 
 [Cписок руководств | Печать]

Errno (3)
  • >> Errno (3) ( Solaris man: Библиотечные вызовы )
  • Errno (3) ( Разные man: Библиотечные вызовы )
  • 
    
    

    NAME

         Errno - System errno constants
    
    
    

    SYNOPSIS

             use Errno qw(EINTR EIO :POSIX);
    
    
    
    

    DESCRIPTION

         `Errno' defines and conditionally exports all the error
         constants defined in your system `errno.h' include file. It
         has a single export tag, `:POSIX', which will export all
         POSIX defined error numbers.
    
         `Errno' also makes `%!' magic such that each element of `%!'
         has a non-zero value only if `$!' is set to that value. For
         example:
    
             use Errno;
    
             unless (open(FH, "/fangorn/spouse")) {
                 if ($!{ENOENT}) {
                     warn "Get a wife!\n";
                 } else {
                     warn "This path is barred: $!";
                 }
             }
    
         If a specified constant `EFOO' does not exist on the system,
         `$!{EFOO}' returns `""'.  You may use `exists $!{EFOO}' to
         check whether the constant is available on the system.
    
    
    

    CAVEATS

         Importing a particular constant may not be very portable,
         because the import will fail on platforms that do not have
         that constant.  A more portable way to set `$!' to a valid
         value is to use:
    
             if (exists &Errno::EFOO) {
                 $! = &Errno::EFOO;
             }
    
    
    
    

    AUTHOR

         Graham Barr <[email protected]>
    
    
    

    COPYRIGHT

         Copyright (c) 1997-8 Graham Barr. All rights reserved.  This
         program is free software; you can redistribute it and/or
         modify it under the same terms as Perl itself.
    
    
    
    


    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