stat命令的实现-mysate

学习使用stat(1),并用C语言实现

提交学习stat（1）的截图

stat --help

man stat

2. man -k ,grep -r的使用
man -k status

grep -r mystat

伪代码
判断输入中文件参数，有继续无输出错误提醒。
声明结构体，调用系统stat（）函数给结构体赋值
依次输出所需的文件名称、大小等信息
产品代码 mystate.c

#include <sys/types.h>
#include <sys/stat.h>
#include <time.h>
#include <stdio.h>
#include <stdlib.h>

int main(int argc, char *argv[])
{
struct stat stat1;
if (argc != 2) {
fprintf(stderr, "Usage: %s <pathname>\n", argv[0]);
exit(EXIT_FAILURE);
}
if (stat(argv[1], &stat1) == -1) {
perror("stat");
exit(EXIT_FAILURE);
}
printf("文件: %s\n",argv[1]);
printf("大小: %lld \n",(long long) stat1.st_size);
printf("块: %lld\n",(long long) stat1.st_blocks);

printf("IO块: %ld ",(long) stat1.st_blksize);
switch (stat1.st_mode & S_IFMT)
{
case S_IFBLK: printf("块设备\n");
break;
case S_IFCHR: printf("character device\n");
break;
case S_IFDIR: printf("目录\n");
break;
case S_IFIFO: printf("FIFO/管道\n");
break;
case S_IFLNK: printf("符号链接\n");
break;
case S_IFREG: printf("普通文件\n");
break;
case S_IFSOCK: printf("socket\n");
break;
default: printf("未知?\n");
break;
}
printf("Inode: %ld\n", (long) stat1.st_ino);
printf("硬链接: %ld\n", (long) stat1.st_nlink);
printf("权限: Uid = %ld Gid = %ld\n",(long) stat1.st_uid, (long) stat1.st_gid);
printf("最近访问: %s", ctime(&stat1.st_atime));
printf("最近更改: %s", ctime(&stat1.st_mtime));
printf("最近改动: %s", ctime(&stat1.st_ctime));
exit(EXIT_SUCCESS);
}