my_ls.c

LINUX下开发的FTP服务器,基本实现FTP的功能.实现PORT的模式.

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

int main()
{
	struct stat c_stat;
	struct dirent *tmp_file;
	struct tm *create_tm;
	char buff[500];
	int count=0;

	DIR *dirtmp_file = opendir(".");
	if(dirtmp_file == NULL)
	{
		printf("OPEN FAILD!\n");
		return 0;
	}

	while(1)
	{
		memset(&c_stat,0,sizeof(stat));
		tmp_file = readdir(dirtmp_file);
		if(tmp_file == NULL)
		{
			break;
		}
		stat(tmp_file->d_name,&c_stat);

		//文件类型
		switch(c_stat.st_mode & S_IFMT)
		{
			case S_IFSOCK:printf("s");break;
			case S_IFLNK:printf("l");break;
			case S_IFREG:printf("-");break;
			case S_IFBLK:printf("b");break;
			case S_IFDIR:printf("d");break;
			case S_IFCHR:printf("c");break;
			case S_IFIFO:printf("p");break;
		}

		// 文件所有者的权限
		if(c_stat.st_mode & S_IRUSR)
			printf("r");
		else
			printf("-");
		if(c_stat.st_mode & S_IWUSR)
			printf("w");
		else
			printf("-");
		if(c_stat.st_mode & S_IXUSR)
			printf("x");
		else
			printf("-");

		//用户组的权限
		if(c_stat.st_mode & S_IRGRP)
			printf("r");
		else
			printf("-");
		if(c_stat.st_mode & S_IWGRP)
			printf("w");
		else
			printf("-");
		if(c_stat.st_mode & S_IXGRP)
			printf("x");
		else
			printf("-");

		//其他用户的权限
		if(c_stat.st_mode & S_IROTH)
			printf("r");
		else
			printf("-");
		if(c_stat.st_mode & S_IWOTH)
			printf("w");
		else
			printf("-");
		if(c_stat.st_mode & S_IXOTH)
			printf("x");
		else
			printf("-");
		
		//文件硬连接数目
		printf("%5d",c_stat.st_nlink);

		//用户识别码
		printf("%7d",c_stat.st_uid);

		//组识别码
		printf("%7d",c_stat.st_gid);

		//文件大小
		printf("%15d",c_stat.st_size);

		//创建时间
		memset(buff,0,500);
		create_tm = localtime(&c_stat.st_mtime);
		strftime(buff,500,"%b %d %H:%M",create_tm);
		printf("  %s",buff);
		
		//文件名
		printf("   %-s\r\n",tmp_file->d_name);

		count ++;
	}
	printf("total %d\r\n",count);

	return 0;
}