getuid, geteuid - get user identification
The getuid() function returns the real user ID of the calling process.
The geteuid() function returns the effective user ID of the
The real user ID is that of the user who has invoked the
program. As the
effective user ID gives the process additional permissions
of ``set-user-ID'' mode processes, getuid() is used to
real user ID of the calling process.
The getuid() and geteuid() functions are always successful,
and no return
value is reserved to indicate an error.
getgid(2), setreuid(2), setuid(2)
The getuid() and geteuid() functions conform to IEEE Std
OpenBSD 3.6 June 4, 1993
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