mystat

1. 提交学习stat（1）的截图

2. man -k ,grep -r的使用

 

 

 

 

 

 3. 伪代码

首先判断输入中是否包含文件参数，如果有则继续，没有则提示用户输入错误。 然后声明结构体，调用stat()函数 打印输出节点ino、 文件类型mode、 文件的硬链接数nlink、 用户ID uid和组ID gid、 块大小blksize、 字节数size、 块数目blocks、 三个时间atime、mtime和ctime按顺序输出。

4. 产品代码 mystate.c，提交码云链接
https://gitee.com/l20191305_li_tianqi/openssl/blob/master/mystat.c

#include <stdlib.h>

#include <sys/stat.h>

#include <unistd.h>

#include <stdio.h>

#include <string.h>

#include <pwd.h>

#include <grp.h>

#include <time.h>

 

long showtime(long timeval);

 

int main(int argc,char *argv[]){

if (argc<2) exit(1);

struct stat buf;

stat(argv[1],&buf);

printf(" 文件: %s\n",argv[1]);

 

printf(" 大小: %-16d块: %-11dIO 块: %-7d",buf.st_size,buf.st_blocks,buf.st_blksize);

if(S_ISREG(buf.st_mode)) {char style[30]="普通文件";printf("%s\n",style);} //判断文件类型

else if(S_ISDIR(buf .st_mode)) {char style[30]="目录文件";printf("%s\n",style);}

else if(S_ISCHR(buf.st_mode)) {char style[30]="字符设备文件";printf("%s\n",style);}

else if(S_ISBLK(buf.st_mode)) {char style[30]="块设备文件";printf("%s\n",style);}

else if(S_ISLNK(buf.st_mode)) {char style[30]="链接文件";printf("%s\n",style);}

else if(S_ISFIFO(buf.st_mode)) {char style[30]="管理文件";printf("%s\n",style);}

else if(S_ISSOCK(buf.st_mode)) {char style[30]="套接字文件";printf("%s\n",style);}

else {char style[30]="未知文件";printf("%s\n",style);}

 

printf("设备: %-5ld/%ldd Inode: %-12d硬链接: %d\n",buf.st_rdev,buf.st_dev,buf.st_ino,buf.st_nlink);

 

char str[10]={'-','-','-','-','-','-','-','-','-','\0'};// 判断权限

int mode=buf.st_mode;

str[0]=(mode&S_IRUSR)? 'r':'-';

str[1]=(mode&S_IWUSR)? 'w':'-';

str[2]=(mode&S_IXUSR)? 'x':'-';

str[3]=(mode&S_IRGRP)? 'r':'-';

str[4]=(mode&S_IWGRP)? 'w':'-';

str[5]=(mode&S_IXGRP)? 'x':'-';

str[6]=(mode&S_IROTH)? 'r':'-';

str[7]=(mode&S_IWOTH)? 'w':'-';

str[8]=(mode&S_IXOTH)? 'x':'-';

 

struct passwd *pw = getpwuid(buf.st_uid);

struct group *gr = getgrgid(buf.st_gid);

 

printf("权限: (%.4o/-%s) Uid: (%5d/%8s) Gid: (%5d/%8s)\n",buf.st_mode-32768,str,buf.st_uid,pw->pw_name,buf.st_gid,gr->gr_name);

printf("环境: \n");

printf("最近访问: ");

showtime(buf.st_atime);

printf("\n");

printf("最近更改: ");

showtime(buf.st_ctime);

printf("\n");

printf("最近改动: ");

showtime(buf.st_mtime);

printf("\n");

// printf("%s\n",style);

}

long showtime(long timeval)

{

 

struct tm *lccp;

lccp=localtime(&timeval);

printf("%d-%.2d-%.2d %.2d:%.2d:%.2d. ",lccp->tm_year+1900,lccp->tm_mon+1,lccp->tm_mday,(lccp->tm_hour)%24,lccp->tm_min,lccp->tm_sec);

time_t timeValue = 0;

struct tm *p = NULL;

time(&timeValue);

p = gmtime(&timeValue);

int i =p->tm_hour;

p = localtime(&timeValue);

int j =p->tm_hour;

// p2 = localtime(&timeValue);

printf("+%.2d00",((j-i)+24)%24);

}

5. 测试代码，mystat 与stat（1）对比，提交截图