$ALLOC

   Allocates a device for exclusive use by a process and its
   subprocesses. No other process can allocate the device or assign
   channels to it until the image that called $ALLOC exits or
   explicitly deallocates the device with the Deallocate Device
   ($DALLOC) service.

   Format

     SYS$ALLOC  devnam ,[phylen] ,[phybuf] ,[acmode] ,[flags]

   C Prototype

     int sys$alloc  (void *devnam, unsigned short int *phylen, void

                    *phybuf, unsigned int acmode, unsigned int

                    flags);
 

Additional information available:

Arguments