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What's the simplest way to detect CDROM media removal/insertion in Linux

开发者 https://www.devze.com 2023-03-19 03:01 出处:网络
What\'s the simplest way to detect CDROM media removal and insertion in Linux? I want to write some simple code to handle this. For example, just bind an event for media insertion and implement the ha

What's the simplest way to detect CDROM media removal and insertion in Linux? I want to write some simple code to handle this. For example, just bind an event for media insertion and implement the handler.开发者_Go百科

Thanks!


Try man udev, or man hotplug.


The desktop 'standards' have options for this.

For example I think Gnome uses dbus for this:

http://www.linuxcertification.co.za/linux-training-sysfs-udev-hald-dbus

[..] These applications are mainly used by desktop environment to carry out tasks when an event occurs such as open the file browser when a USB drive is inserted or image application when a camera is inserted.

D-Bus is used for example to launch media players when a audio CD is inserted and to notify other applications of the currently playing song for example.

Configuration

You could just have your desktop shell (e.g. Gnome/nautilus) call your application when the even happens:

http://library.gnome.org/users/user-guide/stable/gosnautilus-61.html.en

Non-desktop

For the non-desktop version of this, man udev is indeed your friend. Info on writing udev rules is here:

http://reactivated.net/writing_udev_rules.html


The simplest way from user space is to grep the output of the mount command, provided you have configured the CDROM for automount ( in /etc/fstab).But if you want to have an asynchronous notification, you might need to look into udev rules and uevents.

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