Linux 2.6 - man page for h_errno (linux section 3posix)
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H_ERRNO(P) POSIX Programmer's Manual H_ERRNO(P)
h_errno - error return value for network database operations
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.
No errors are defined.
The following sections are informative.
Applications should obtain the definition of h_errno by the inclusion of the <netdb.h>
h_errno may be withdrawn in a future version.
endhostent() , errno() , the Base Definitions volume of IEEE Std 1003.1-2001, <netdb.h>
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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