return the address of a shared memory location

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?
ethornsbAsked:
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ethornsbAuthor Commented:
Adjusted points to 300
0
jpk041897Commented:
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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