wuid(category9-linux-distributionen.html) - phpMan

getpwuid (3)         - get password file entry
getpwuid (3p)        - search user database for a user ID
getpwuid_r (3)       - get password file entry
getpwuid_r (3p)      - search user database for a user ID
newuidmap (1)        - set the uid mapping of a user namespace