SETUID(2) System Calls Manual SETUID(2)
NAME
setuid, setgid - set user and group ID
SYNOPSIS
setuid(uid)
setgid(gid)
DESCRIPTION
The user ID (group ID) of the current process is set to the argument.
Both the effective and the real ID are set. These calls are only per‐
mitted to the super-user or if the argument is the real or effective
ID.
SEE ALSO
getuid(2)
DIAGNOSTICS
Zero is returned if the user (group) ID is set; -1 is returned other‐
wise.
SETUID(2)