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return the address of a shared memory location

Posted on 1998-04-17
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Last Modified: 2010-04-21
I need the address of a shared memory location.  All I have is the key_t - is there anyway to get the shmid from this information?
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Question by:ethornsb
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by:ethornsb
ID: 2006257
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jpk041897 earned 600 total points
ID: 2006258
Use:

void *shmat(int shmid, void*shmaddr, int shmflag);

smid is obtained via a call to

int shmget(key_t key, int size, int shmflag);

and shmaddr should be (void *)0 for your purposes.

shmat will return a pointer to the shared memory segment.

See shmop(2) and shmget(2) in the Programmers Reference manual for more info.
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