suid(category25-plesk.html) - phpMan
getresuid (2) - get real, effective and saved user/group IDs getresuid32 (2) - get real, effective and saved user/group IDs setfsuid (2) - set user identity used for file system checks setfsuid32 (2) - set user identity used for file system checks setresuid (2) - set real, effective and saved user or group ID setresuid32 (2) - set real, effective and saved user or group ID