#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>
//   File: `testfile'
//   Size: 102             Blocks: 8          IO Block: 4096   regular file
// Device: 807h/2055d      Inode: 1265161     Links: 1
// Access: (0644/-rw-r--r--)  Uid: (    0/    root)   Gid: (    0/    root)
// Access: 2014-08-13 14:07:20.000000000 +0800
// Modify: 2014-08-13 14:07:07.000000000 +0800
// Change: 2014-08-13 14:07:07.000000000 +0800
// 文件：bin/mys
//   大小：17016     	块：40         IO 块：4096   普通文件
// 设备：fd00h/64768d	Inode：2119409     硬链接：1
// 权限：(0700/-rwx------)  Uid：(    0/    root)   Gid：(    0/    root)
// 环境：unconfined_u:object_r:default_t:s0
// 最近访问：2021-11-06 10:52:42.717439983 +0800
// 最近更改：2021-11-06 10:52:34.182337354 +0800
// 最近改动：2021-11-06 10:52:34.182337354 +0800
// 创建时间：2021-11-06 10:52:34.170337210 +0800
// struct stat
// {
//     dev_t st_dev; //device 文件的设备编号
//     ino_t st_ino; //inode 文件的i-node
//     mode_t st_mode; //protection 文件的类型和存取的权限
//     nlink_t st_nlink; //number of hard links 连到该文件的硬连接数目, 刚建立的文件值为1.
//     uid_t st_uid; //user ID of owner 文件所有者的用户识别码
//     gid_t st_gid; //group ID of owner 文件所有者的组识别码
//     dev_t st_rdev; //device type 若此文件为装置设备文件, 则为其设备编号
//     off_t st_size; //total size, in bytes 文件大小, 以字节计算
//     unsigned long st_blksize; //blocksize for filesystem I/O 文件系统的I/O 缓冲区大小.
//     unsigned long st_blocks; //number of blocks allocated 占用文件区块的个数, 每一区块大小为512 个字节.
//     time_t st_atime; //time of lastaccess 文件最近一次被存取或被执行的时间, 一般只有在用mknod、utime、read、write 与tructate 时改变.
//     time_t st_mtime; //time of last modification 文件最后一次被修改的时间, 一般只有在用mknod、utime 和write 时才会改变
//     time_t st_ctime; //time of last change i-node 最近一次被更改的时间, 此参数会在文件所有者、组、权限被更改时更新
// };

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);
        
        // char h[2]={'-','\0'};
        // if(j-i>=0){h[0]='+';}
        // printf("%d-%d-%.2d %d:%d:%d.",cp->tm_year+1900,cp->tm_mon+1,cp->tm_mday,(cp->tm_hour+8)%24,cp->tm_min,cp->tm_sec);
        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);
}