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Old 10-23-2017, 03:34 PM   #1
RogerByrum
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Create a rule so that my USB device will have the same name each time my Raspberry Pi boots up.


BUS=="usb", KERNEL=="adutux[0-3]", SYSFS{manufacturer}=="www.ontrak.net", SYSFS{serial}=="A38165", SYMLINK="adutux4", MODE="0666"

Currently the device is identified as /dev/adutux0
I want to create /dev/adutux4 based on the serial number and manufacturer of the device. That way my code can always reference /dev/adutux4 no how many of the same device I have and plugged in and in any port.

Raspbian GNU/Linux9.1
 
Old 10-23-2017, 03:45 PM   #2
TheEzekielProject
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I don't have an answer for your question, but why not just use the UUID or PARTUUID of the device in your code?
 
Old 10-23-2017, 03:55 PM   #3
RogerByrum
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Sure. How do I find the UUID of my device?
 
Old 10-23-2017, 04:13 PM   #4
suicidaleggroll
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Depending on the class of device, it will often show up in a subdirectory of /dev/. For example, USB serial adapters go into /dev/serial. My machine currently has two USB serial adapters plugged in:
Code:
ls -l /dev/serial/by-id/
total 0
lrwxrwxrwx 1 root root 13 2017-10-05 10:10 usb-FTDI_FT230X_Basic_UART_DN020MNB-if00-port0 -> ../../ttyUSB0
lrwxrwxrwx 1 root root 13 2017-09-27 13:00 usb-FTDI_USB_Serial_Converter_FTGSITJ4-if00-port0 -> ../../ttyUSB1
These can be used as unique identifiers as well.

Last edited by suicidaleggroll; 10-23-2017 at 04:15 PM.
 
Old 10-23-2017, 04:14 PM   #5
TheEzekielProject
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Quote:
Originally Posted by RogerByrum View Post
Sure. How do I find the UUID of my device?
Type
Code:
blkid
in a root terminal
 
Old 10-23-2017, 04:21 PM   #6
onebuck
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Member response

Hi,

Welcome to LQ!

Quote:
Originally Posted by RogerByrum View Post
Sure. How do I find the UUID of my device?
As root from cli you can use;
Code:
ls -al /dev/disk/by-uuid/
Hope this helps.
Have fun & enjoy!


EDIT: sorry for my input, I see now you want to id a USB Flash so 'blkid' would provide uuid for that filesystem device.

Last edited by onebuck; 10-23-2017 at 04:29 PM. Reason: add comment correction
 
Old 10-23-2017, 04:25 PM   #7
michaelk
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FYI this is a data acquisition device and not a USB drive...

http://ontrak.net/Default.htm
 
Old 10-23-2017, 04:39 PM   #8
onebuck
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Member response

Hi,

Thanks for the input. Did not realize device is DAS since OP omitted that and I did not research it further.

Sorry for any information that I provided.
 
Old 10-23-2017, 04:48 PM   #9
RogerByrum
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I wish it were that easy. the Device is not listed in "/dev/serial/by-id"

It is only listed in "/dev" as adutux0

I tried "sudo blkid /dev" but got <blank>

Could it be in a different folder?
 
Old 10-25-2017, 12:56 PM   #10
RogerByrum
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Thumbs up Solution

Original Rule:
BUS=="usb", KERNEL=="adutux[0-3]", SYSFS{manufacturer}=="www.ontrak.net", SYSFS{serial}=="A38165", SYMLINK="adutux4", MODE="0666"

New Rule:
KERNEL=="adutux[0-3]", SUBSYSTEMS=="usb", ATTRS{manufacturer}=="www.ontrak.net", ATTRS{serial}=="A38165", MODE="0666", SYMLINK+="adutux4"

Thanks to everyone who helped.
 
Old 10-25-2017, 01:22 PM   #11
michaelk
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Well done.
 
  


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