一、stat(1)
- stat作用:用来显示文件的详细信息,包括inode, atime, mtime, ctime
- stat格式:stat [OPTION]…FILE…
- stat命令格式:
- -L:显示符号链接
- -f:显示文件所在的文件系统信息
- -t:以简洁的方式输出摘要信息
- stat输出内容:
- File:显示文件名
- Size:显示文件大小
- Blocks:文件使用的数据块总数
- IO Block:IO块大小
- regular file:文件类型(常规文件)
- Device:设备编号
- Inode:Inode号
- Links:链接数
- Access:文件的权限
- Gid、Uid:文件所有权的Gid和Uid
- 学习截图
二、man -k ,grep -r的使用
三、伪代码
声明结构体
读入命令行文件路径
调用stat()函数给结构体赋值
逐个打印结构体中的数据
四、产品代码 mystate.c的码云链接
#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 sb;
if (argc != 2) {
fprintf(stderr, "Usage: %s <pathname>\n", argv[0]);
exit(EXIT_FAILURE);
}
if (stat(argv[1], &sb) == -1) {
perror("stat");
exit(EXIT_FAILURE);
}
printf("File type: ");
switch (sb.st_mode & S_IFMT) {
case S_IFBLK: printf("block device\n");
break;
case S_IFCHR: printf("character device\n");
break;
case S_IFDIR: printf("directory\n");
break;
case S_IFIFO: printf("FIFO/pipe\n");
break;
case S_IFLNK: printf("symlink\n");
break;
case S_IFREG: printf("regular file\n");
break;
case S_IFSOCK: printf("socket\n");
break;
default: printf("unknown?\n");
break;
}
printf("I-node number: %ld\n", (long) sb.st_ino);
printf("Mode: %lo (octal)\n",(unsigned long) sb.st_mode);
printf("Link count: %ld\n", (long) sb.st_nlink);
printf("Ownership: UID=%ld GID=%ld\n",(long) sb.st_uid, (long) sb.st_gid);
printf("Preferred I/O block size: %ld bytes\n",(long) sb.st_blksize);
printf("File size: %lld bytes\n",(long long) sb.st_size);
printf("Blocks allocated: %lld\n",(long long) sb.st_blocks);
printf("Last status change: %s", ctime(&sb.st_ctime));
printf("Last file access: %s", ctime(&sb.st_atime));
printf("Last file modification: %s", ctime(&sb.st_mtime));
exit(EXIT_SUCCESS);
}