The Open Group Base Specifications Issue 6
IEEE Std 1003.1, 2004 Edition
Copyright © 2001-2004 The IEEE and The Open Group, All Rights reserved.

NAME

h_errno - error return value for network database operations

SYNOPSIS

[OB] [Option Start] #include <netdb.h> [Option End]

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 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h_errno may be withdrawn in a future version.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>

CHANGE HISTORY

First released in Issue 6. Derived from the XNS, Issue 5.2 specification.

End of informative text.
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