Technical Reference: Communications, Volume 2

sethostid Subroutine

Purpose

Sets the unique identifier of the current host.

Library

Standard C Library (libc.a)

Syntax

int sethostid ( HostID) int HostID;

Description

The sethostid subroutine allows a calling process with a root user ID to set a new 32-bit identifier for the current host. The sethostid subroutine enables an application program to reset the host ID.

All applications containing the sethostid subroutine must be compiled with _BSD set to a specific value. Acceptable values are 43 and 44. In addition, all socket applications must include the BSD libbsd.a library.

Parameters

HostID

Specifies the unique 32-bit identifier for the current host.

Return Values

Upon successful completion, the sethostid subroutine returns a value of 0.

If the sethostid subroutine is unsuccessful, the subroutine handler performs the following functions:

Returns a value of -1 to the calling program.
Moves an error code, indicating the specific error, into the errno global variable. For further explanation of the errno variable see Error Notification Object Class in AIX 5L Version 5.2 General Programming Concepts: Writing and Debugging Programs.

Error Codes

The sethostid subroutine is unsuccessful if the following is true:

Error	Description
EPERM	The calling process did not have an effective user ID of root user.

Related Information

The getsockname subroutine, gethostid subroutine, gethostname subroutine.

Sockets Overview in AIX 5L Version 5.2 Communications Programming Concepts.