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[[!meta title="file_exec"]]

    routine file_exec (
    	exec_file: file_t;
    	RPT
    	exec_task: task_t;
    	flags: int;
    	argv: data_t SCP;
    	envp: data_t SCP;
    	fdarray: portarray_t SCP;
    	portarray: portarray_t SCP;
    	intarray: intarray_t SCP;
    	deallocnames: mach_port_name_array_t SCP;
    	destroynames: mach_port_name_array_t SCP);

Overlay a task with a file.  Necessary initialization, including authentication
changes associated with set[ug]id execution must be handled by the filesystem.
Filesystems normally implement this by using [[`exec_newtask`|exec_newtask]] or
[[`exec_loadtask`|exec_loadtask]] as appropriate.