A/UX® Programmer's Reference

getuid(2) getuid(2)
NAME
get uid, geteuid, getgid, getegid - get real and
effective user IDs and group IDs
SYNOPSIS
#include
uid t getuid ()
uid t geteuid ( )
uid t getgid ( )
uid t getegid ( )
DESCRIPTION
get uid returns the real user ID of the calling process The real
user ID is a positive integer by which each user allowed on the
system is identified.
geteuid returns the effective user ID of the calling process.
Each active process has an effective user ID that is equal to the
process's real user ID unless the process of one of its ancestors
evolved from a fail that had the set-user-ID bit set (see exec(2».
getgid returns the real group ID of the calling process. A real
group ID is a positive integer that identifies each user as a member
ofagroup.
getegid returns the effective group ID of the calling process.
Each active process has an effective group ID that is equal to the
process's real group ID unless the process of one of its ancestors
evolved from a fail that had the set-group-ID bit set (see
exec(2».
RETURN VALUE
getuid
geteuid
getgid
getegid
February, 1990
Revision C
Returns the real user ID of the calling process.
Returns the effective user ID of the calling process.
Returns the real group ID of the calling process.
Returns the effective group ID of the calling
process.
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