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SYS$DGBLSC (OpenVMS)					  SYS$DGBLSC (OpenVMS)

NAME
       shmctl - perform shared memory control operations

       shmdt - detach a shared memory region

       SYS$DGBLSC - Delete global section

EXPLAINATION
       The Digital UNIX shmctl and shmdt functions combined are similar to the
       OpenVMS SYS$DGBLSC system service.  The shmctl function can  be	called
       with  the  command  (second)  argument set to IPC_RMID to mark a shared
       memory region for deletion.  The shared memory section will be  deleted
       when  the  last	process	 that has attached to it calls shmdt to detach
       from it.	 The shmdt function actually detaches the shared  memory  sec‐
       tion from the virtual memory map of the process.

RELATED INFORMATION
       Digital UNIX Functions:

	   shmctl(2), shmdt(2), munmap(2) delim off

							  SYS$DGBLSC (OpenVMS)

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