Linux – udev rules don’t appear to be working

Just a couple of silly mistakes on my part. Below are the reasons for no output

1. udev does not produce output to any sort of terminal/notification. I found it here!

udev does not run these programs on any active terminal, and it does not execute them under the context of a shell. Be sure to ensure your program is marked executable, if it is a shell script ensure it starts with an appropriate shebang (e.g. #!/bin/sh), and do not expect any standard output to appear on your terminal.

2. for redirecting output to the file, I was using ~ instead of the whole path of the user's home directory. Changing it to absolute path did produce the output. For the record, I put my rule under 12-hf-usb.rules. The only problem I am facing is that the script is executed twice, even after using RUN=. I'll edit the answer once I find it. It looks like I have to make the rule more specific, to match only one device. It is not important for me at the moment so I will skip it

A lot of people are facing trouble while using udev. Here is some help to go through the problems:

udevinfo and related tools have been replaced by udevadm. Below are some useful commands:

• udevadm monitor --udev to view udev activity upon adding/removing hardware in real time
• lsusb to see attached usb devices
• udevadm info --attribute-walk --name /dev/sdc? to view hierarchical details of devices

Source: http://www.jpichon.net/blog/2011/12/debugging-udev-rules/

You can use GOTO in a rule to skip to a label as soon as the rule has been applied. If the label is at the very end of the rules, then all subsequent rules are skipped.

So in 30.myusb.rules:

ACTION=="add", SUBSYSTEM=="usb", ATTRS{idVendor}=="1f75", ATTRS{idProduct}=="0902", RUN+="/bin/mount.30.1f75.0902.sh", GOTO="myusb_end"

And at the end of 31.myusb.rules:

LABEL="myusb_end"

Or use GOTO="very_end", and put LABEL="very_end" in a file that is loaded last (/etc/udev/rules.d/zzzzzzzz.rules).