baitap1_3.cc

basic about Unix ptheard and pid

#include <sys/types.h>
#include <stdio.h>
#include <unistd.h>
#include <wait.h>
#include <iostream.h>
#include <stdlib.h>
#include <sys/shm.h>
#include <sys/stat.h>

int main(int argc, char *argv[])
{	
	int seg_id=atoi(argv[1]);
	shmid_ds m;
	shmctl(seg_id,IPC_STAT,&m);	
        
	cout<<"Segment ID: "<<seg_id<<endl;
	cout<<"Key:	   "<<m.shm_perm.__key<<endl;
	cout<<"Mode:	   "<<m.shm_perm.mode<<endl;
	cout<<"UID:	   "<<m.shm_perm.uid<<endl;
	cout<<"Attaches:   "<<m.shm_nattch<<endl;
}