#include"common.h"
int main()
{
int id;
int key=getpid();
id=shmget(key,100,0666|IPC_CREAT);//创建共享内存,注意读写权限
printf("id = %d\n",id);
sleep(10);
char buf[30];
char *p=shmat(id,NULL,0);//获取共享内存起始地址
memcpy(buf,p,30);
printf("buf = %s\n",buf);
}
#include"common.h"
int main()
{
printf("input id..\n");
int id;
scanf("%d",&id);
char buf[]="abcdefghijk";
char *p=shmat(id,NULL,0);//获取共享内存起始地址
memcpy(p,buf,sizeof(buf));
printf("buf = %s\n",p);
}
结果: