detect usb stick

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Antique

detect usb stick

Posted on: 2013/4/15 22:11 #1

Home away from home

I'm having a problem i need help with. I'm trying to figure out a way to detect when user inserts a usb stick. For this i'm using the following code:


file_lock = Lock("usb0:",SHARED_LOCK); 

if(file_lock != (BPTR)NULL)

{ printf("found usb\n"); 

UnLock(file_lock);  

} 

else     

{     

printf("no usb\n"); 

UnLock(file_lock);

}

This works when the usb stick is allready inserted upon start of the program. But when i insert it when the program has been running for some time. It always gives me no usb whether the usb is inserted or not. Anyone has a clue why???

X5000

LyleHaze

Re: detect usb stick

Posted on: 2013/4/15 22:27 #2

Just popping in

I don't think it's necessary (or wise) to UnLock a lock that you never Lock'ed successfully.

I was going to say that you cannot get a shared lock if there is already an exclusive lock.. the docs says that only files will get exclusive locks though. :)

Antique

Re: detect usb stick

Posted on: 2013/4/16 21:47 #3

Home away from home

I've changed the code.

I found autorun.inf on my stick. Is this file present on all new sticks?

X5000

LiveForIt

Re: detect usb stick

Posted on: 2013/4/17 11:12 #4

Home away from home

(NutsAboutAmiga)

Basilisk II for AmigaOS4
AmigaInputAnywhere
Excalibur
and other tools and apps.

Antique

Re: detect usb stick

Posted on: 2013/4/20 12:48 #5

Home away from home

Any other solutions for detecting usb stick?

X5000

LiveForIt

Re: detect usb stick

Posted on: 2013/4/20 14:25 #6

Home away from home

http://www.os4depot.net/index.php?fun ... ty/filetool/freespace.lha

I think it has some source code you might modify, or look at to understand, if you like to.

Or else you might do a hock on Exec AddDevice and RemDevice its bit more dirty but at least you not dont need to pool for device is interserted or not, but its more risky as it might crash your OS, if do it wrong.

Edited by LiveForIt on 2013/4/20 14:43:43
Edited by LiveForIt on 2013/4/20 17:34:30

(NutsAboutAmiga)

Basilisk II for AmigaOS4
AmigaInputAnywhere
Excalibur
and other tools and apps.

cha05e90

Re: detect usb stick

Posted on: 2013/4/20 16:53 #7

Quite a regular

You might ask Fredrik Wikstrom/salass who implemented an "Autorun" feature already. See OS4Depot.

X1000|II/G4|440ep|2000/060|2000/040|1000

nbache

Re: detect usb stick

Posted on: 2013/4/20 20:43 #8

Just can't stay away

Why do you want to detect specifically that an USB stick is inserted? That's not very flexible. (And judging by your code sample, it would even have to be the first USB disk inserted, since you look specifically for USB0:)

Are you asking the user to make a particular file available, or is your program going to scan a volume, looking for particular types of files or something?

In any case, maybe you should let the user direct the program to the file or volume you need by means of a file requester.

That concept of having the system do something automagically when inserting a medium is contradicting the usual AmigaOS goal of giving the user control.

Just some thoughts for consideration.

Best regards,

Niels

Antique

Re: detect usb stick

Posted on: 2013/4/20 22:45 #9

Home away from home

Its a small project im fiddling with. And the only user will be me so the approach is fine. It's for detecting and scanning the usb stick for certain files. and will only be 1 usb available anyway.

X5000

Gilloo

Re: detect usb stick

Posted on: 2013/4/24 16:01 #10

Just popping in

How about intuition events IDCMP_DISKINSERTED and IDCMP_DISKREMOVED ?

http://gega.homelinux.net/AmigaDevDocs/lib_9.html

You can scan your disk if you get at least a IDCMP_DISKINSERTED event...

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