Did you change the sizeof? You don't even use buffer in the first program, so you can get rid of that. Then when you shmget pass (sizeof(int) * 2) as the size argument.
Also, to the third argument, shmflg, you have to OR in IPC_CREAT. So the call should be:
Without IPC_CREAT, it's likely that shmget is returning -1 which, since you're not doing error checking, is then passed to shmat which is returning NULL. When you attempt to reference through the NULL pointer you are seg faulting.
I suggest reading the man pages for shmget!
edit: I also suggest not using 0666 and using the proper mode flags; but that's your prerogative. For example:
edit2: haha, beaten by hours, didn't even notice there was a second page.
Last edited by DreamWarrior; 12-16-2011 at 03:33 PM..
Dear Reader,
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