Linux操作系统秉承“一切皆文件”的设计思想,将所有的设备页看作文件来进行处理。目前的Linux版本中,当内核发现一个块设备时,用户空间会利用udev这一数据结构以及相关的操作来为块设备创建其所需的块设备文件。 关于块设备文件,可以从两方面来进行 ...
socket在Linux中对应的文件系统叫Sockfs,每创建一个socket,就在sockfs中创建了一个特殊的文件,同时创建了sockfs文件系统中的inode,该inode唯一标识当前socket的通信。 如下图所示,左侧窗口使用nc工具创建一个TCP连接;右侧找到该进程id(3384),通过查看该进程下的描述符 ...
近年来脾气愈发温和的 Linus Torvalds,刚刚在 Linux 内核邮件列表中发布一篇措辞最为激烈的帖子,矛头直指谷歌一位贡献者关于文件系统的建议。 引发 Linus 愤怒情绪的导火索正是 inodes,即索引节点。根据红帽给出的定义,inodes 是“给定文件系统上特定元数据 ...
It started with a phone call. Could we build a Linux box that would mount and read a DEC drive and make the data available to NT workstations via Samba? The answer was “I'll have to get back to you.” ...
Some files on a Linux system can appear in more than one location. Follow these instructions to find and identify these "identical twins" and learn why hard links can be so advantageous. Identifying ...
It doesn’t take very much time working on a Unix system before your attention is drawn to the mysteries of the inode, especially these days with the concept of metadata getting so much public ...
A lot of information is available about individual files on a Unix system. For example, the ls -l command will display the permissions matrix and ls -i will display a file’s inode. But, if we want to ...
I am currently writing a version of File Tree Walk for my systems programming class for the UNIX operating system. I was wondering if there was a verion of the stat function that takes an inode number ...