[转载]Linux C编程-实现文件夹的递归拷贝

copy（读取的路径或名字，目标文件的路径或名字）

{

       if(读取的是一个文件夹)

       {     创造一个文件夹

             打开文件夹，读取文件夹的内容

             判断是否是一个文件夹  是：递归copy（xx，xx）； 

             否，说明是个文件，拷贝文件       

       }

}

int copy_r(char *read_dir_path, char *write_dir_path)
{
    DIR * p_dir;
    struct dirent * p_dirent;


    char read_buf[256];
    char write_buf[256];

    sprintf(read_buf,"%s/", read_dir_path);
    sprintf(write_buf,"%s/",write_dir_path);

    strcat(read_dir_path,"/");
    if( Is_dir(read_buf) )
    {
        //mkdir
        if(mkdir(write_buf, 0755) < 0)
        {
            printf("mkdir fall:%s
", strerror(errno));
            return -1;
        }


        //opendir and readdir

        if((p_dir = opendir(read_buf)) == NULL )
        {
            printf("Usage:cp -r <src_dir> <dat_dir> error:%s
",strerror(errno));
            return -1;
        }

        while((p_dirent=readdir(p_dir)) != NULL)
        {
            char read_buffer[256];
            char write_buffer[256];
            sprintf(read_buffer,"%s%s", read_buf, p_dirent->d_name);
            sprintf(write_buffer,"%s%s", write_buf, p_dirent->d_name);

            printf("%s
%s
",read_buffer,write_buffer);

            //it is a directory
            if( Is_dir(read_buffer) && 0 != strcmp(p_dirent->d_name, ".") && 0 != strcmp(p_dirent->d_name, "..") )
            {

                copy_r(read_buffer, write_buffer);
            }

            else if(0 != strcmp(p_dirent->d_name, ".") && 0 != strcmp(p_dirent->d_name, ".."))
            {
                //copy file
                if( file_copy_line(read_buffer, write_buffer) < 0 )
                    return 0;
            }


        }

        closedir(p_dir);

    }

}