关于readdir读出时的排序有关问题

关于readdir读出时的排序问题
linux 下 readdir 读出的文件或目录是按什么方式排序的啊？创建时间？还是？我想得到比较权威的观点，现在在做一个项目，感觉用这个函数非常好，现在苦于不知道readdir读出文件的排序方式。

[解决办法]
struct dirent
{
long d_ino; /* inode number */
off_t d_off; /* offset to this dirent */
unsigned short d_reclen; /* length of this d_name */
char d_name [NAME_MAX+1]; /* filename (null-terminated) */
}

d_ino is an inode number. d_off is the distance from the start of the directory to this dirent. d_reclen is the size
of d_name, not counting the null terminator. d_name is a null-terminated filename.


是按照d_off 来排序的， 我写了个小程序作测试。

C/C++ code

#include<sys/types.h>#include<stdio.h>#include<dirent.h>  #include<unistd.h>  main()  {    DIR   *dir;     struct   dirent   *ptr;     int   i;  dir   =opendir(".");  while((ptr   =   readdir(dir))!=NULL)  {         printf("  d_off:%d d_name: %s\n", ptr->d_off,ptr->d_name);     }        closedir(dir);}
[解决办法]
探讨

              struct dirent 
              { 
                  long d_ino;                /* inode number */ 
                  off_t d_off;                /* offset to this dirent */ 
                  unsigned short d_reclen;    /* length of this d_name */ 
                  char d_name [NAME_MAX+1];  /* filename (null-terminated) */ 
              } 

d_ino  is an inode number.  d_of…

[解决办法]
<?php
//Open images directory
$dir = opendir("images");//List files in images directory
while (($file = readdir($dir)) !== false)
 {
 echo "filename: " . $file . "<br />";
 }closedir($dir);
?> 

The output of the code above could be:
上述代码将输出下面的结果：

filename: .
filename: ..
filename: cat.gif
filename: dog.gif
filename: food
filename: horse.gif