lab1 : Xv6 and Unix utilities
环境配置
//step1
$ git clone git://g.csail.mit.edu/xv6-labs-2021
//step2
$ cd xv6-labs-2021
$ git checkout util
lab 1
sleep
// 新建user/sleep.c
#include "types.h"
#include "user.h"int main(int argc, char *argv[])
{// 检查参数是否正确if(argc != 2){fprintf(2, "usage: sleep n\n");exit(1);}// 转换参数为整数int n = atoi(argv[1]);// 等待n秒sleep(n);exit(0);
}
