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Linux 2.6 - man page for h_errno (linux section 3posix)

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

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 obsolescent 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 link-
       age. 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       h_errno may be withdrawn in a future version.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 orig-
       inal Standard can be obtained online at http://www.opengroup.org/unix/online.html .

IEEE/The Open Group			       2003				       H_ERRNO(P)


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