int getauid()
int setauid(auid) int auid;
The getauid() system call returns the audit user ID for the current process. This value is initially set at login time and inherited by all child processes. This value does not change when the real/effective user IDs change, so it can be used to identify the logged-in user, even when running a setuid program. The audit user ID governs audit decisions for a process.
The setauid() system call sets the audit user ID for the current process. Only the super-user may successfully execute these calls.
getauid() returns the audit user ID of the current process on success. On failure, it returns -1 and sets errno to indicate the error.
setauid() returns:
Created by unroff & hp-tools. © somebody (See intro for details). All Rights Reserved. Last modified 11/5/97