Remove the shared memory identifier specified by shmid from the system and destroy the shared memory segment and shmid_ds data structure associated with it.

1. 
   At the end of line 62578 in page 1942, add a new sentence:
   

   
   If any process currently has the shared memory segment attached to its address space by use of the shmat( ) function [Xref shmat on page 1940] the effect on that process, or of any attempt by that process to access the memory attached to the shared memory segment that has been removed is unspecified.
   

   
   


2. 
   At the end of line 62578 in page 1942, add a new sentence:
   

   
   If any process currently has the shared memory segment attached to its address space by use of the shmat( ) function [Xref shmat on page 1940] the IPC_RMID operation shall fail.
   

   
   Between lines 62585 and 62586 correctly format, and add a new error code:
   

   
   [EBUSY] The argument cmd is IPC_RMID and shmid specifies a shared memory segment that is currently mapped into the address space of one or more processes.
   

   
   


3. 
   At the end of line 62578 in page 1942, add new sentences:
   

   If any process currently has the shared memory segment attached to its address space by use of the shmat( ) function [Xref shmat on page 1940] that attachment shall be converted to appear as if it had attached a segment created by the shmget( ) function [Xref shmget on page 1946] with a key of IPC_PRIVATE, where the shared memory identified returned (the shmid) is no longer valid for any future use. The process shall otherwise be unaffected. Where multiple processes had attached to the shared memory segment being removed, the IPC_PRIVATE segment they each now have access to shall be shared between them.
   

   
   


4. Delete all of pages 1940 to 1947 (inclusive).