set-file-owner

[procedure] set-file-mode fname/fd/port mode

[procedure] set-file-owner fname/fd/port uid

[procedure] set-file-group fname/fd/port gid

Scsh: chmod(2) and chown(2).

Some implementations have the same functionality with the names like change-file-mode/change-file-owner, sys-chmod?/sys-chown?, or chmod.