# Inter Process Communication
    March 14, 2018

We can attach nicely to same memory segment from 2 different processes:

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ {.c .numberLines}
// ipc via shared mem
// attach to shared memory;
key_t my_ftok = ftok("~/surf-webext-dom-shared-mem",'a');
 
int mem_seg=shmget(my_ftok,1024*1024,IPC_CREAT|0660);
if(mem_seg==-1)
{
g_print("shmget failed: %s\n",strerror(errno));
}
 
shared_buf=shmat(mem_seg,NULL,0);
if(shared_buf==(void*)-1)
{
g_print("shmat failed: %s\n",strerror(errno));
}
g_print("attached to shared memory.\n");
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~