- 1.提交学习stat(1)的截图
man 1 stat查看
作用:获取文件信息
头文件:include <sys/types.h> #include <sys/stat.h> #include <unistd.h>
函数原型:int stat(const char *path, struct stat *buf)
返回值:成功返回0,失败返回-1;
参数:文件路径(名),struct stat 类型的结构体 - 2.man -k ,grep -r的使用
man -k stat | grep 2查找系统调用
grep -r快速搜索在目录下面的含有关键字的文件
- 3.伪代码
查看并存储文件各个属性
调用函数stat()
依次打印输出节点ino、
文件类型mode、
文件的连接数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 - 4.产品代码 mystate.c
#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
int main(int argc, char *argv[])
{
struct stat sb;
if (argc != 2) {
fprintf(stderr, "Usage: %s <pathname>
", 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
");
break;
case S_IFCHR: printf("character device
");
break;
case S_IFDIR: printf("directory
");
break;
case S_IFIFO: printf("FIFO/pipe
");
break;
case S_IFLNK: printf("symlink
");
break;
case S_IFREG: printf("regular file
");
break;
case S_IFSOCK: printf("socket
");
break;
default: printf("unknown?
");
break;
}
printf("I-node number: %ld
", (long) sb.st_ino);
printf("Mode: %lo (octal)
",(unsigned long) sb.st_mode);
printf("Link count: %ld
", (long) sb.st_nlink);
printf("Ownership: UID=%ld GID=%ld
",(long) sb.st_uid, (long) sb.st_gid);
printf("Preferred I/O block size: %ld bytes
",(long) sb.st_blksize);
printf("File size: %lld bytes
",(long long) sb.st_size);
printf("Blocks allocated: %lld
",(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);
}
码云链接:https://gitee.com/lan_yi_da/codes/kc9e0qigpyadl1hu8245m66
- 5.测试代码,mystat 与stat(1)对比