Need drives information on linux

This is a discussion on Need drives information on linux within the Linux Programming forums, part of the Platform Specific Boards category; hi all, I need information regarding the Drives on linux, just like the information provided by ::GetLogicalDrives & ::GetDriveType on ...

  1. #1
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    Need drives information on linux

    hi all,
    I need information regarding the Drives on linux, just like the information provided by ::GetLogicalDrives & ::GetDriveType on Windows.
    Please help me out if u have any idea, basically I need to detect USB drive,
    also if anyone has any idea of about how to register my task, so as I can get the information(signal) when a pen drive is attached/detached(I need to do some task on the basis of this).

    Thanks in advance,
    Amit Sahrawat

  2. #2
    Kernel hacker
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    For detecting USB devices, you need to look up "Linux Hotplug" in google.

    --
    Mats
    Compilers can produce warnings - make the compiler programmers happy: Use them!
    Please don't PM me for help - and no, I don't do help over instant messengers.

  3. #3
    Cat without Hat CornedBee's Avatar
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    For finding out what drives are actually mounted, where, which devices, which filesystem and what options, parse /proc/mounts.
    All the buzzt!
    CornedBee

    "There is not now, nor has there ever been, nor will there ever be, any programming language in which it is the least bit difficult to write bad code."
    - Flon's Law

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    I need some point in my task where I can get messages like whether device is added/removed. On each addition/removed I need to keep track of these devices and browse them.
    So, how do we do that here?

    Thanks
    Amit Sahrawat

  5. #5
    Captain Crash brewbuck's Avatar
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    Quote Originally Posted by amit_sahrawat View Post
    I need some point in my task where I can get messages like whether device is added/removed. On each addition/removed I need to keep track of these devices and browse them.
    So, how do we do that here?
    Poll the /proc directory at some sane interval and watch for things being added/removed.

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    Some how I am not getting any entry in /proc/bus/usb, I am plugging in USB hub device with once CARD. So, I suppose I should get an entry into that...
    and I am not able to understand the /sys/bus/usb/devices/ things

    OR the entry would be some where else?

    Thanks,
    Amit Sahrawat

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    Now I have plugged in my Pen drive, but there is still no entry in /proc/bus/usb...

    But, I got something which might be useful...
    /sys/block/sda/

    An entry gets created each time(addition) under /sys/block/sda, and all the details related with the device are available here, but still auto mounting does not happen.

    Removing the pen drive the entry gets deleted.

    Thanks
    Amit Sahrawat

  8. #8
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    Do you want to get "it's_plugged_in"-events or do you need "it's_mounted_events"?
    In the latter case you have to check, if your usb stick file system really gets mounted. therefore just type mount[enter] in a root shell. mounting will create the /proc/mounts entries. if your stick doesn't get auto mounted you'll probably want to google for "automounting linux" or something like that. the /sys/-entries get created while the kernel detects if your device gets plugged in. After doing so you can also check the kernel message buffer with dmesg[enter] to see what the kernel detects.

  9. #9
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    anyways I would have to somehow create a listener thread on /sys/block and look out for the 'removable=1' option to get the the removable drives, rest I need to look further...

    neways thanks..

    Regards,
    Amit Sahrawat

  10. #10
    Crazy Fool Perspective's Avatar
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    just fork a `df` command and parse the output of that.

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