h_errno(3p) - phpMan

H_ERRNO(3P)                POSIX Programmer's Manual               H_ERRNO(3P)

PROLOG
       This  manual  page is part of the POSIX Programmer's Manual.  The Linux
       implementation of this interface may differ (consult the  corresponding
       Linux  manual page for details of Linux behavior), or the interface may
       not be implemented on Linux.
NAME
       h_errno - error return value for network database operations
SYNOPSIS
       #include <netdb.h>
DESCRIPTION
       This method of returning errors is used only in connection  with  obso-
       lescent functions.
       The  <netdb.h> header provides a declaration of h_errno as a modifiable
       lvalue of type int.
       It is unspecified whether h_errno is a macro or an identifier  declared
       with  external linkage. If a macro definition is suppressed in order to
       access an actual object, or a program defines an  identifier  with  the
       name h_errno, the behavior is undefined.
RETURN VALUE
       None.
ERRORS
       No errors are defined.
       The following sections are informative.
EXAMPLES
       None.
APPLICATION USAGE
       Applications  should  obtain the definition of h_errno by the inclusion
       of the <netdb.h> header.
RATIONALE
       None.
FUTURE DIRECTIONS
       h_errno may be withdrawn in a future version.
SEE ALSO
       endhostent(),    errno(),    the    Base    Definitions    volume    of
       IEEE Std 1003.1-2001, <netdb.h>
COPYRIGHT
       Portions  of  this text are reprinted and reproduced in electronic form
       from IEEE Std 1003.1, 2003 Edition, Standard for Information Technology
       --  Portable  Operating  System  Interface (POSIX), The Open Group Base
       Specifications Issue 6, Copyright (C) 2001-2003  by  the  Institute  of
       Electrical  and  Electronics  Engineers, Inc and The Open Group. In the
       event of any discrepancy between this version and the original IEEE and
       The  Open Group Standard, the original IEEE and The Open Group Standard
       is the referee document. The original Standard can be  obtained  online
       at http://www.opengroup.org/unix/online.html .

IEEE/The Open Group                  2003                          H_ERRNO(3P)