Baslinux mailing list

[sindi keesan <keesan AT sdf.lonestar.org>]

On Tue, 2 Jan 2007, Christof Lange wrote:

> Hi list,
>
> I have been trying to make the mounting of USB storage devices
> more user-friendly and seem to need some help with scripting.
>
> When I want to mount a floppy the device name is always
> the same, i.e. /dev/fd0 . So it is easy to write a script
> or an alias in order to mount and unmount the device. e.g.
>
>    alias a:='mkdir /A ; mount /dev/fd0 /A'
>    alias :a='umount /A ; rmdir /A'

You don't need to make and remove the /A directory every time.
We have it set up to type A, C, etc. to mount to /A and AU etc. to umount.
I don't think aliases work in an xterm but scripts do.

> With USB storages devices it is a bit more complicated. When I
> exchange them they show up at different addresses. When I tested
> Sindi's and David's 2.4.31 kernels I realized that the first
> deviced plugged in turns up at /dev/sda1 , the second one at
> /dev/sdb1 , the third one at /dev/sdc1 and the fourth at /dev/sdd1 .
> After that the next device can be mounted from /dev/sda1 again.
>
> I would like to write a script that uses one or more mount points,
> but will be able to mount a new device with only one command, eg.
> u: (and :u for unmounting). The script, however, must be able to
> check where a device is. When I open the 'file' /dev/sda1 in
> Midnight commander I get an error message if the device does not
> exist and some contents if it exists. How can I check the contents
> of these device files automatically? I tried:

When you boot with the USB-storage kernel or insert the module, it will 
tell you (probably on the last line) which /dev/ it found.  Can you use 
grep to search dmesg?  Or just watch while booting?

> cat /dev/sda1 |head -n1|cut -b10 >/dev/null && echo sda1 exists
>
> but this produced a lot of unwanted screen output (error messages
> obviously do not come from 'cat') and did not produce the
> wanted errorlevel for && in the script.
>
> Which Linux command could I use instead of cat?
>
> Christof
>
>
>
>
> is there
>
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keesan AT sdf.lonestar.org
SDF Public Access UNIX System - http://sdf.lonestar.org