什么是vold.fstab的内容，或dev_mount行的语法？

问题描述

我想了解如何实现各个部分的SD卡魔术在Android上一些帖子。这些职位是指/etc/vold.fstab，并建议修改其内容的附加或更改dev_mount行。

好了，有趣的，我想。我尝试使用Google vold.fstab和dev_mount更多地了解他们。奇怪的是，这些词似乎只有在有关如何做的SD卡神奇的事情Android的各种论坛帖子存在。

也就是说，我找不到什么是应该的vold.fstab文件中的任何官方手册页或文档中包含，是否如它是一个脚本，或者一个配置文件，dev_mount是命令或规范等。

所以，作为一个非常的n00b Android开发者，

1. 在哪里是在vold.fstab？官方文档或手册页
2. 除了developer.android.com，我应该在哪里寻找在Android COM prehensive文档

解决方案

我发现这是信息：

https://android.googlesource.com/platform/docs/source.android.com/+/android-4.2.1_r1.1/src/tech/storage/index.md

具体做法是：

  dev_mount＆LT;标签＆gt; ＆LT;装入点＆GT; ＆LT;分区＆GT; ＆LT; sysfs_path＆GT; [国旗]
 

• 标签：标签为卷
。
• 装入点：该卷应安装文件系统路径
• 分区：（基于1）分区号，或'自动'的第一个可用的分区
。
• sysfs_path ：一个或多个的sysfs路径设备，可以提供这种坐骑点。用空格分开，并且每个人都必须以 / 。
• 标志：可选的逗号分隔的标志位的列表，不能包含 / 。可能的值包括不可移动和可加密。

I am trying to understand some posts on how to accomplish various pieces of sd card magic on Android. These posts refer to /etc/vold.fstab and suggest modifying its contents with additional or changed dev_mount lines.

Okay, interesting, I think. And I try googling vold.fstab and dev_mount to learn more about them. Oddly, these terms only seem to exist in various forum posts about how to do magical things with sd cards for Android.

That is, I can't find any "official" man pages or documentation on what the vold.fstab file is supposed to contain, whether for instance it is a script, or a config file, whether dev_mount is a command or a specification, etc.

So as a very n00b Android developer,

1. Where is the official documentation or man pages on vold.fstab?
2. Apart from developer.android.com, where should I look for comprehensive documentation on Android

解决方案

I found this to be informative:

https://android.googlesource.com/platform/docs/source.android.com/+/android-4.2.1_r1.1/src/tech/storage/index.md

Specifically:

dev_mount <label> <mount_point> <partition> <sysfs_path> [flags]

• label: Label for the volume.
• mount_point: Filesystem path where the volume should be mounted.
• partition: Partition number (1 based), or 'auto' for first usable partition.
• sysfs_path: One or more sysfs paths to devices that can provide this mountpoint. Separated by spaces, and each must start with /.
• flags: Optional comma separated list of flags, must not contain /.Possible values include nonremovable and encryptable.

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