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Old 06-08-2009, 05:44 PM   #1
redhat00
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URGENT - Help with /dev/ttyACM0 ownership


OS - RHEL 4.

I'm configuring a USB 56k USRobotic modem. The modems device file
is /dev/ttyACM0. We have a Sitescope application that uses that device file. The owner of the device file is sitescope:sitescope. Every time I use modprobe -r cdc_acm, the ownership changes back to root:root. How do I make the ownership static in the /dev/udev/udev.conf file? I looked at the man pages but I still dont understand how to make the changes in that file. Please help. I need to meet my deadline. Thanks.
 
Old 06-08-2009, 05:46 PM   #2
acid_kewpie
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Please do not mark threads as urgent. They are not urgent for any of the members of this site who very kindly give up some of their spare time to help others.
 
Old 06-08-2009, 05:51 PM   #3
redhat00
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Originally Posted by acid_kewpie View Post
Please do not mark threads as urgent. They are not urgent for any of the members of this site who very kindly give up some of their spare time to help others.

Why not? I do understand that members are giving up there spare time to help others. That's what this forum is all about right? To help others!!!! Thanks.
 
Old 06-08-2009, 05:52 PM   #4
jamescondron
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Whuts a RHEL lolz... That sounds like one of those 'paying for support' distributions, perhaps you ought to try them, since they're the ones you're paying to listen to 'URGENT' help requests.

Since it is urgent, perhaps you ought to try google, urgently:
http://www.google.co.uk/search?hl=en...+linux&spell=1
 
Old 06-08-2009, 05:57 PM   #5
redhat00
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Originally Posted by jamescondron View Post
Whuts a RHEL lolz... That sounds like one of those 'paying for support' distributions, perhaps you ought to try them, since they're the ones you're paying to listen to 'URGENT' help requests.

Since it is urgent, perhaps you ought to try google, urgently:
http://www.google.co.uk/search?hl=en...+linux&spell=1
Okay, I guess I will tone down the "Urgent" to HELP lol..
I did not find a good hit on "google".
 
Old 06-08-2009, 06:02 PM   #6
jamescondron
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A hint though, people don't like to be told something is needed urgently from them; especially when its all voluntary, its a bit rude.

That being said, if you have RHEL, presumably you have the support paid for, so in that case you'll be far better getting in touch with them, that is what you're paying for of course.

Two questions, though, did you look at the man page, and do you really need the device ownership changing?
 
Old 06-08-2009, 06:21 PM   #7
redhat00
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Originally Posted by jamescondron View Post
A hint though, people don't like to be told something is needed urgently from them; especially when its all voluntary, its a bit rude.

That being said, if you have RHEL, presumably you have the support paid for, so in that case you'll be far better getting in touch with them, that is what you're paying for of course.

Two questions, though, did you look at the man page, and do you really need the device ownership changing?
Thanks for the hint and consideration. However, I guess it's different where I'm from. If something is urgent, it's urgent. I did not think it would be rude to say "Urgent". By the way, your right, I do have support. Yes, I need the device ownership to change.
 
Old 06-08-2009, 06:59 PM   #8
jamescondron
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You misunderstand, this is urgent to you, not urgent to us, to put us under your time constraint and tell us you need help urgently is what is rude, the implication that you need us to instantly come and help you.

But yes, get in touch with Red Hat, or man page- looking at the man page would have told you instantly what the answer was
 
Old 06-08-2009, 10:22 PM   #9
TB0ne
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Quote:
Originally Posted by redhat00 View Post
Thanks for the hint and consideration. However, I guess it's different where I'm from. If something is urgent, it's urgent. I did not think it would be rude to say "Urgent". By the way, your right, I do have support. Yes, I need the device ownership to change.
Sorry, but I have to agree with jamescondron....

Unless you're PAYING us to hurry up with an answer for you, it's rude, no matter where you're from. If a friend of yours offered to loan you his car, and you told him "Geez, this is filthy! Wash it, wax it, and be sure it's got a full tank of gas"....it's kinda the same thing. You're complaining about what you're getting for free...and around here, there are a LOT of people who purposely IGNORE threads marked as URGENT...even when they know the answer.

On that note...these may get you going in the right direction:


http://www.linuxquestions.org/questi...device-644237/
http://www.linuxquestions.org/questi...canner-490305/
http://reactivated.net/writing_udev_rules.html

The third link is a bit of a how-to with udev rules. Also, if you're totally new to things, and these links and RHEL support don't help you out, you may want to consider going 'low tech' with it, until you get a handle on udev. A small script file can easily be written, to check for the existence of the /dev/ttyACM0 device, and (if found), chown it accordingly. Put a sleep statement in it, so it only runs every minute or so, and it'll be sort-of-automatic.
 
Old 06-09-2009, 12:14 AM   #10
redhat00
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Originally Posted by TB0ne View Post
Sorry, but I have to agree with jamescondron....

Unless you're PAYING us to hurry up with an answer for you, it's rude, no matter where you're from. If a friend of yours offered to loan you his car, and you told him "Geez, this is filthy! Wash it, wax it, and be sure it's got a full tank of gas"....it's kinda the same thing. You're complaining about what you're getting for free...and around here, there are a LOT of people who purposely IGNORE threads marked as URGENT...even when they know the answer.

On that note...these may get you going in the right direction:


http://www.linuxquestions.org/questi...device-644237/
http://www.linuxquestions.org/questi...canner-490305/
http://reactivated.net/writing_udev_rules.html

The third link is a bit of a how-to with udev rules. Also, if you're totally new to things, and these links and RHEL support don't help you out, you may want to consider going 'low tech' with it, until you get a handle on udev. A small script file can easily be written, to check for the existence of the /dev/ttyACM0 device, and (if found), chown it accordingly. Put a sleep statement in it, so it only runs every minute or so, and it'll be sort-of-automatic.
We're all entitled to our opinions, which is good for a forum. I still don't think it's rude to ask for help even if it's marked as URGENT. I'm also not complaining about anything and I don't really care who purposely ignores the thread. Got the answer. Thanks for the links.
 
Old 06-09-2009, 04:47 PM   #11
TB0ne
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Quote:
Originally Posted by redhat00 View Post
We're all entitled to our opinions, which is good for a forum. I still don't think it's rude to ask for help even if it's marked as URGENT. I'm also not complaining about anything and I don't really care who purposely ignores the thread. Got the answer. Thanks for the links.
Well, glad you got the answer, but saying you don't care, isn't really very nice.

And since you say you got the answer, how about posting it here, so the entire community can benefit? Since you came here for help, it'd be nice if you helped others.........
 
  


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