问题标签 [mount]

有没有人知道在 Solaris (10) 中获取文件系统挂载/卸载和/或新/删除设备通知的好（即有效）方法，而不需要 root？

我试图避免简单地轮询 /etc/mnttab 以获取新/删除/更改的条目，因此我的第一个原型涉及使用sysevent_subscribe_event侦听设备事件，然后将设备信息与 /etc/mnttab 结合使用来获取挂载点. 这很好用，但sysevent_subscribe_event需要 root 权限才能运行，而且我无法访问最终用户的盒子，所以我无法真正提升他们的权限。

我想这可能会很棘手，考虑到没有 root 运行的限制，但任何帮助都非常感激！

我正在编写一个 bash 脚本并且我已经errexit设置，所以如果任何命令没有返回 0 退出代码，即如果任何命令没有成功完成，脚本就会死掉。这是为了确保我的 bash 脚本是健壮的。

我必须挂载一些文件系统，复制一些文件，然后卸载它。我umount /mnt/temp在开头放了一个，这样它会在做任何事情之前卸载它。但是，如果未安装，则 umount 将失败并停止我的脚本。

有可能做一个umount --dont-fail-if-not-mounted /mnt/temp吗？如果设备未安装，它会返回 0 吗？喜欢rm -f？

映像文件有一个分区表，它包含多个分区。

环回设备可能是一种可能性。

相关话题：

• http://linux.derkeiler.com/Mailing-Lists/Kernel/2005-01/7183.html
• http://lists.gnu.org/archive/html/grub-devel/2005-01/msg00077.html
• ftp://ftp.hq.nasa.gov/pub/ig/ccd/enhanced_loopback/

I'm working on an embedded system whoose details are explained at the end of this post. Tools are ruby on linux.

I put my ruby code on a remote NAS device on network and mount it to the embedded system I'm working on using NFS v3. My project scenario is like this: there is an all-in-one auto starter which 1.mounts the nfs share, 2. starts the webrick ruby code on mounted dir, 3. starts some other biz-logic related ruby code again on mounted dir, 4. starts a ruby code on local file system which does some basic logging and stuff... I put each step in a loop that will retry when a start operation fails (start operations are made by system 'ruby XXXX' or popen3 calls). Here's what happens when I run this starter: step1 goes ok, step 2 fails, step 3 fails, step 4 goes ok, then step2 and 3 are retried and both starts ok too allways at second trial(I want to add that started codes are independent so; it doesnt matter which one starts first and changing the start order didnt make any difference).

I have inspected this problem and found out it also happens when I start things manually from shell and filtered it down to this: My webrick code loads .rb files that are at the same directory as itself and has some FileHandlers using the subdirs in NFS mount and my biz-logic also loads .rb files from nfs mount. And this, I believe, is the source of my problem (I have tried to load those files using both absolute paths like '/mnt/myMount/myLib.rb' and File.Join which both didnt make any difference).

Also, the webrick filehandlers too act pretty strange in this scenario, they always fail at first request of a file and then succeeds at the second request, no matter the file size.

To sum up, as the title says, when a Ruby code on NFS mount uses another file on same mount, ruby gives an EIO (Input Output Error). I was able to reproduce this problem using simple .rb files (that just print itselves filename) loading each other as explained in the above scenario on my environment (though I havent tried this on a regular PC). How can I solve this, is it about the paths given to load/require methods or what?

My working envrionment: The device I'm working with is an intelligent RFID reader, with an embedded linux arm based computer on-board. The only api/language manufacturer allows and provides (w/o getting out of license terms) is ruby, and they give no-support for installing extra-stuff and they have customized the kernel in device to make installing/compiling anything as hard as possible. I can use extra ruby stuff if they're just .rb lib files that is I can easily just include them in my code, but anything that requires compiling is a no-no. Also, this system does not have gem.

我编写了一个基于 FUSE 的小型文件系统，现在唯一缺少的部分是我想用 fstab(5) 注册它，以便在系统启动时自动挂载它和/或手动挂载它mount /srv/virtual-db。我怎样才能做到这一点？

我知道，我可以/usr/bin/vdbfs.py /srv/virtual-db从一些初始化脚本运行，但这并不完全漂亮。

我很抱歉，因为这可能不完全是一个编程问题，但它是高度相关的，因为打包和部署仍然是程序员的工作。

为什么statfs()andstatvfs()调用在它们如此相似时都存在？

在什么情况下我会更喜欢其中一种？

我觉得在 Android 模拟器上开发有点盲目，看不到 AVD (.img) 上的文件系统。

有没有办法在 Windows 或 Linux 中安装它，这样我至少可以看到文件列表和内容？

如果它也安装了写权限，则奖励。

谢谢你。

我正在尝试在 Mac OS 和 Linux 中开发一个程序，该程序列出 USB 驱动器中的文件和文件夹。当 USB 设备连接和移除时，我需要获取一些事件。我知道在 Mac OS XI 中可以使用 IOKit。但是我不知道如何获取挂载设备的挂载点。我可以使用 IOkit 获得它吗？是否有适用于 Linux 和 Mac 的跨平台解决方案？

问题说明了一切。我想要 C 函数调用，它返回已安装文件系统的列表以及文件系统类型等相关信息。

我正在尝试编写一个 Cocoa 程序来检测连接到 Mac OS 的 iPod。我正在收听 NSWorkspaceDidMountNotification 和 NSWorkspaceDidUnmountNotification 以获取 USB 设备安装和卸载通知。我可以使用 NSString *path = [[notif userInfo] objectForKey:@"NSDevicePath"]; 获取已安装设备的设备路径 但我也不需要知道设备 ID、供应商 ID、产品 ID 等来检查安装的设备是否是 iPod。我认为前进的方向是 IOKit。但我有一种感觉，它适用于低级编程。有没有其他方法可以找到这些？另外，如果是 IO 套件，当我提供安装路径时，是否有任何示例程序会给出 ID？

非常感谢。