?? main.c~
字號:
#include <sys/types.h>#include <sys/ipc.h>#include <sys/msg.h>#include <stdio.h>#include <string.h>#include <sys/shm.h>#include <sys/wait.h>int main(){ struct shmid_ds buf; int a[10]={0,1,2,3,4,5,6,7,8,9}; int a1[10]={0,0,0,0,0,0,0,0,0,0}; pid_t pid; key_t key; int shmid; int *p,ps,i; if((key = ftok("./",'a'))==-1){ perror("key"); return -1; } if((shmid = shmget(key,30*sizeof(int),IPC_CREAT|0640))==-1){ perror("shmget"); return -1; } if((p=(int *)shmat(shmid,NULL,0))==(void *)-1){ perror("shmat"); return -1; } pid=fork(); switch(pid){ case -1: perror("fork"); return -1; case 0: memcpy(p,a,sizeof(a)); sleep(2); a1[0]=getpid(); memcpy(p,a1,sizeof(a1)); while(1); break; default: while(waitpid(pid,&ps,WNOHANG)==0){ for(i=0;i<sizeof(a)/sizeof(int);i++) printf("%d ",p[i]); usleep(500000); if(p[0]>0) kill(p[0],9); } printf("\n"); shmdt(p); if(shmctl(shmid,IPC_RMID,&buf)==-1){ perror("shmclt"); return -1; } }return 0;} ?? 快捷鍵說明
復(fù)制代碼
Ctrl + C
搜索代碼
Ctrl + F
全屏模式
F11
切換主題
Ctrl + Shift + D
顯示快捷鍵
?
增大字號
Ctrl + =
減小字號
Ctrl + -