NAME
h_errno — error
return value for network database operations
SYNOPSIS
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.
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h_errno may be withdrawn in a future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(3) , errno(3) , the Base Definitions volume of IEEE Std 1003.1-2001 (“POSIX.1”), <netdb.h>
CHANGE HISTORY
First released in Issue 6. Derived from the XNS, Issue 5.2 specification.
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