/************ * shm.c * ************/#include <sys/types.h>#include <sys/ipc.h>#include <sys/shm.h>#define SHMKEY 74#define K 1024int shmid;cleanup(){shmctl(shmid,IPC_RMID,0);exit(0);}main(){int i;	int *pint;char *addr1,*addr2;extern char *shmat();extern cleanup();for (i=0;i<20;i++)signal(i,cleanup);shmid=shmget(SHMKEY,128*K,0777|IPC_CREAT);addr1=shmat(shmid,0,0);addr2=shmat(shmid,0,0);printf("addr1 0x%x addr2 0x%x\n",addr1,addr2);pint=(int*)addr1;for (i=0;i<256;i++)*pint++=i;pint=(int*)addr1;*pint=256;pint=(int*)addr2;for (i=0;i<256;i++)printf("index %d\tvalue%d\n",i,*pint++);shmdt(addr1);shmdt(addr2);pause();}