Software :: Udev Rule Fails When Symlink Is Defined?
Sep 19, 2010
I'm having some trouble with udev, in that it won't create me a symlink for the infrared device which is part of my Hauppauge Nova-TD-500 TV card.I've got the card installed, and for the most part working, but I want to have the infrared device on /dev/ir.I've created a rule in /etc/udev/rules.d/ called 55-dvb_usb_dib0700-ir.rules which contains this:
Code:
SUBSYSTEM=="input", ATTR{name}=="IR-receiver inside an USB DVB receiver", RUN="/bin/date > /home/xbmc/foo", SYMLINK+="ir"
[code]....
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Jan 13, 2010
I'm running Ubuntu 9.10 (Karmic Koala) on a laptop and would like NumLock to automatically toggle depending on whether my USB keyboard is plugged in (numlock on) or unplugged (numlock off).
To accomplish this, I first installed the "numlockx" package. numlockx on and numlockx off works fine.
To hook into the device system, I thought I'd use udev. I have read "Writing udev rules", but I'm having trouble getting the udev rule to work.
First, here's an example of the dmesg output:
[20906.985102] usb 3-2: new low speed USB device using uhci_hcd and address 6
[20907.166403] usb 3-2: configuration #1 chosen from 1 choice
[20907.192904] input: Microsoft Natural® Ergonomic Keyboard 4000 as /devices/pci0000:00/0000:00:1a.0/usb3/3-2/3-2:1.0/input/input20
[20907.193100] microsoft 0003:045E:00DB.000B: input,hidraw1: USB HID v1.11
[Code]....
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May 23, 2010
I am trying to write a udev rule for my headset but i don't understand where i get the information to make the rule. I know i need to add
Code: RUN+="bash /home/luke-jennings/headset" at the end of it so the script i wrote runs. I don't know how to get any of the identifying info for the headset and which bits to use where. How do I get the information?
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Jun 3, 2010
I'm trying to set my network interfaces so that they don't get random every boot.(eg assign eth0 to a network interface with a given MAC addr, and eth1 to the other one)I trew in a udev rule (in fact just modified the rules that was automatically generated and set the ethX in it) but the system ignores my udev rule.What am I missing ?Here is all the info :
Code:
$cat /etc/udev/rules.d/70-persistent-net.rules
# This file maintains persistent names for network interfaces.
[code]....
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Mar 29, 2011
I am not good at writing udev rules. I am using RHEL 4.7, I would like to invoke a file install.sh which is in CDROM as soon as the CDROM is inserted
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Aug 1, 2010
I have a UDEV rule below that maps a symlink from a specific usb device and 'Should' run a command.
Code:
BUS=="usb",SYSFS{serial}=="1111111111111111111111111111",SYMLINK+="myusbstick_%n",RUN+="/usr/local/bin/my_command"
The symlink part is fine but it does not appear to run the command when I plug the device in. I can run the command "/usr/local/bin/my_command" from the shell fine.
Code:
mount /dev/myusbstick_1 /media/TMPUSB && cryptsetup luksOpen /dev/md5 md5_crypt --key-file=/media/TMPUSB/key && vgscan && vgchange -ay && mount -a && umount /media/TMPUSB
What am I missing. I have tried +x in owner,group and other.By the way what does UDEV run as, I assumned +x on ROOT as that is the owner should be enough.
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May 2, 2011
On Ubuntu 10.04 I would like to setup udev to execute a backup script when a specific USB drive is inserted. Udev detects the USB drive, but my script is executed 7 times instead of just once. Can't figure out what's wrong.
My udev rules file:
Code:
/etc/udev/rules.d# cat 20-stick.rules
ACTION=="add", ATTRS{vendor}=="Kingston", ATTRS{model}=="DataTraveler G2 ", RUN="/usr/local/bin/sync.sh"
Dummy backup script: connecting USB drive results in 7 times date written to /tmp/test
code....
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May 12, 2010
i need all my /media/* newly created by insertion of usb drives, chmodded 666.I tried some tips using various threads, but i failed.I'm on Slack 64 13.0.
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May 29, 2011
I'm trying to configure gpsd 2.96 to start automatically from udev rule on a Slack 13.37 box.1. I've compiled and installed gpsd from sources and made sure it starts manually.2. I've copied the /lib/udev/gpsd.hotplug and /lib/udev/gpsd.hotplug.wrapper scripts in their places from the source tree and made them executable.3. I've copied the gpsd.rules file from sources into /etc/udev/rules.d4. I renamed it 99-persistent-gpsd.rules to run late in the bootup process.5. I've copied the /etc/default/gpsd file from sources and made sure it has the right settings inside.
Now, for the results. If I plug the gps usb dongle in while the system runs, it starts gpsd if it is not started, and it connects to it just as it should. But if I start the system with the dongle in, gpsd doesn't get started during boot. I can't find any relevant message in /var/log/syslog or /var/log/messages for boot time. There is stuff there from when I plug the dongle in while the system is running though. It's like udev ignores the rules for it at boot time.Is there something in the Slackware boot scripts that would prevent running those scriptssd.hotplug.wrapper which in turn runs /lib/udev/gpsd.hotplug which is a Python script)?Here is the contents of 99-persistent-gpsd.rules (ignore the comments referring to Debian, it was meant for a Debian box). My usb gps adapter is the first one - the Prolific chipset one:
Code:
# udev rules for gpsd
# $Id: gpsd.rules 5861 2009-08-03 13:41:01Z bzed $
[code]....
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Apr 19, 2011
I have a trayless SATA hotswap bay that is really terrific for quickly attaching and removing SATA hard drives. I'm trying to write a udev rule to create a symbolic link to the device node for the drive that is attached through the hotswap bay (/dev/bay -> /dev/sdX). This eliminates any ambiguity when performing destructive tasks (fdisk, etc). I'm running squeeze amd64. I've read through several tutorials and have it working somewhat. Here's the output of udevadm info for a drive attached via the hotswap bay.
looking at device '/devices/pci0000:00/0000:00:11.0/host7/target7:0:0/7:0:0:0/block/sdb':
KERNEL=="sdb"
SUBSYSTEM=="block"
DRIVER==""
ATTR{range}=="16"
ATTR{ext_range}=="256"
ATTR{removable}=="0"
ATTR{ro}=="0"
ATTR{size}=="156301488"
ATTR{alignment_offset}=="0"
ATTR{capability}=="52" ....
Here is my udev rule
DEVPATH=="/devices/pci0000:00/0000:00:11.0/host7/*", SUBSYSTEM=="block", SYMLINK+="bay%n"
This produces the desired behavior and gives me an fdisk-able device node. The problem I am having is that the "host" component of the DEVPATH varies from bootup to bootup. I'm just using on onboard SATA, host2-7, specifically host7. There is also onboard PATA, host0-1. It seems to just be random which "host"s are assigned to which controller. For example, the next time I boot the system, the onboard SATA will be host0-5 and the onboard PATA will be host6-7. In this simple case, I could just write 2 rules, one for each possibility and it would still be correct because of the different PCI addresses of the two controllers. But on systems with more SCSI (uh... libata, actually) controllers, a "host" file can point to different physical ports between bootstraps. This would be bad. Does anyone know of a way to write a rule to tie a device node to a specific physical SATA port on the motherboard/hba?
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Jan 24, 2010
I have a netbook (MSI Wind U100 rebrand) that has one of those card readers built into the handrest. The thing is I've never used it once, and it keeps popping up in powertop as waking the cpu when it should just shut up and be quiet.Aside from breaking open the case and tearing it out, the immediate solution is to browse to /sys/bus/usb/devices/usb1/1-6/ and pipe 1 to the file remove. That disables it until system reboot or resume, at which point I have to do it all over again.
Code:
$ echo 1 | sudo tee /sys/bus/usb/devices/usb1/1-6/remove
Now I'd like to create an udev rule to make it not get initialized at all. A quick Google search found me this article on creating udev rules, and after toying about with the udevadm tool I managed to produce the attributes/properties of the device.
Code:
zorael@lethe:/sys/bus/usb/devices/usb1/1-6$ udevadm info -a -p $(pwd)
Udevadm info starts with the device specified by the devpath and then walks up the chain of parent devices. It prints for every device found, all possible attributes in the udev rules key format. A rule to match, can be composed by the attributes of the device and the attributes from one single parent device.
looking at device '/bus/usb/devices/usb1/1-6':
KERNEL=="1-6"
SUBSYSTEM=="usb"
DRIVER=="usb"
ATTR{configuration}=="CARD READER
[code].....
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Sep 1, 2010
Debian testing: Kernel: Linux 2.6.32-5-amd64I can now only boot into safemode because I cannot get these 4 packages to upgrade:
udev
media-player-info
xserver-xorg-core
[code]....
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Jul 16, 2010
Question (and Google results aren't making this clear): Ubuntu has both iptables & ip6tables installed. 1. If I set a rule in iptables, does that rule also apply to ipv6, or just ipv4?
2. If "no" to above, then it would be prudent to *also* set ip6tables rules as well if I want to maintain an active firewall, correct?
3. Does ip6tables rules have the same syntax and behavior (more or less) to iptables rules - i.e. can I just copy my iptables rules & change "iptables" to "ip6tables"?
4. Any gotchas or issues that I should be aware of?
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Aug 28, 2009
On a Sun Ultra10 333MHz, 512M, 9gB HDD. Booting Fedora-9. Silo v1.4.14 into kernel 2.6.27 64bit (vmlinuz-2.6.27.12-78.2.9fc9.sparc64). This is a brand-new installation.Although it's running on a Sparc it makes v.litte difference so far as this bootprocess, teh way Linux runs, where everything is - is concerned. That's why I've cross posted this query here.Booting merrily, in the interactive startup section just past "Starting udev", "Setting hostname", at "Checking filesystems" I get:
/: clean, 155284/557056 files, 920932/2225412 blocks
fsck.ext2: Device or resource busy while trying to open /dev/sda
Filesystem mounted or opened exclusively by another program? [FAILED]
*** An error occured during the filesystem check
*** Dropping you to a shell, the system will reboot
*** when you leave the shell
*** Warning --SELinux is active
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Dec 29, 2010
i have Ubuntu10.10 (kernel-2.6.35-22-generic) installed. struct stat StatBuff;
[Code]...
I have mounted a windows share folder on /mnt. When i gave any directory within /mnt/ to stat function it fails with errorno 75. perror shows "Value too large for defined data type". Example 1 is fail but Example 2 works fine.
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Jun 14, 2010
If I have the below sudoers entryusera ALL=(userb) NOPASSWD: /home/userc/bin/executable-fileusera ALL=(userb) NOPASSWD: /home/userc/bin/link-to-another-executable-fileWhen I log-on as usera and try running the below commands, it workssudo -u userb /home/userc/bin/executable-filebut NOT the one below.sudo -u userb /home/userc/bin/link-to-another-executable-fileSorry, user usera is not allowed to execute '/home/userc/bin/link-to-another-executable-file' as userb on hostname.
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Feb 27, 2010
How can be changed a symlink from the /etc/rc2.d directory.I want tho change the time of start from S20 to S60.
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Oct 10, 2010
I have a server with my music on it. There is a network share where all my machines can access that music. In the past I have created a link inside the Music folder of each user/machine which links to the Samba share. I have been doing this by linking to /home/[username]/.gvfs/share on server.
In 8.10 I am able to drag and drop to create the necessary link from Music to share on server. With maybe 9.10 I lost the ability to drag and drop the link and had to resort to the command line ( ln -s "/home/[username]/.gvfs/share on server" /home/[username]/Music ). With 10.10 I don't seem to be able to create this link using any method. (Any link which is created is linked to / .) (After 8.10 admin rights are required to create the link from ~/.gvfs/whatever.) This method is very handy as all of the machines and users point to the exact same location for their music (~/Music/share) and if I can't create that link this system of organization fails.
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Feb 4, 2011
how to undo this?
"Simply change the symlink so that it points to /bin/bash. To do this, open a terminal, and type the following:
sudo rm -f /bin/sh
sudo ln -s /bin/bash /bin/sh
From now on your scripts should work as their authors expected."
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Aug 22, 2011
So, I made a bash script that I need to be executed on booting, I created it in /etc/sbin/mount_folder.sh
Code:
sudo chmod +x mount_folder.sh
sudo ln -s mount_folder.sh /etc/init.d/mount_folder.sh
Then I try to:
[Code].....
Also, if I create the symbolic link in the same folder I can execute it normally
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Mar 13, 2010
In my MIDI music collection, I have a "best" folder with duplicate copies of only my favorite files. Recently I thought, why waste memory with duplicates--can't I just put symlinks in the "best" folder? So I tried to, in Konqueror. It would only let me make the symlinks from the Konqueror superuser account.
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Jun 7, 2011
2.6.38-8-generic
Mint 11 64 bit
I'm trying to move a file from a directory to another one and create a symlink but seem to be doing something wrong. Have done "man ln" and looked up info in coreutils but I don't seem to be able to get it right. There are two files in ./home/jim/.config/banshee-1/ that I want to move to ./home/jim/Dropbox/banshee. I have created backups of both and created the new folder in Dropbox. see attached screen shots. I then run
Code: jim@saturn ~ $ sudo ln - ./home/jim/Dropbox/banshee/banshee.db ./home/jim/.config/banshee-1/banshee.db
ln: creating symbolic link `./home/jim/.config/banshee-1/banshee.db': No such file or directory and get the above error message. Now I know symlinks do not need to be complete at the time of creation, but I'm not sure if I have done this right or not and if I try and read and write banshee.db at the original location if it will do it properly and efficiently. Is this a case where I should do a hardlink instead and have both files. If I want to do this every time at start up, how do I automate the commands once I have them right?
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Jun 16, 2010
if it is possible to copy and paste as a symlink.
It seems to me that the only way to create a shortcut or symlink is through the command line. I use KDE.
This was one of the most basic things Windows could do since Windows 95, and is one of the simplest shortcuts I dearly miss since leaving Windows.
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Feb 10, 2010
I have a directory containing files and symlinks to files elswhere. I make a copy of the directory like this:
cp -rp dir/* new_dir
The files in new_dir have their original timestamps, but the symlinks have the current time. touch -t does not operate on the symblink but on the files they reference. Is there a way to set the timestamp of the symlink to a time in the past?
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Feb 11, 2011
I have been using linux for about 4 months now and decided i fancy the challenge of building a LFS system(Using book version 6.7). I have got all the way up to the point of gcc being installed and then have to create the symlink to libgcc.a
Now i have typed in the command and tried copy and pasting but i always get the following output:
Code:
Now it cannot find -gcc it appears but states at the bottom ./libgcc.a file exists.
If its a fatal error or what I can do to possibly correct it!
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Jul 4, 2010
I have a CMS I have developed, which will run on several sites all hosted in sub directories on my dedicated server. I want to create symlinks for the main files of the CMS, including all config files, functions and admin sections. Then there will be a few files specific to each site.I read some tutorials on creating symlinks, although most are not very good in my opinion.
Do you have to create a symlink for every file I want to include? Or can I just create a symlink to a directory? For example:CMS is located at /www/cms/.Can I make www/domain1/ point to that directory, and if so, will all files include themselves correctly. I think I am a bit confused on how this works.
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Feb 19, 2011
Because I am working with some 3d software, and to be able to start it I need to symlink libGL.so.1 and libGL.so.1.2 from /usr/lib64/ to libGL.so.1 and libGL.so.1.2 from /usr/lib64/catalyst/ folder. I move existing libs to new names by adding .bak at the end of file name.
But everytime I restart machine soemthing changes libGL.so.1 linking from libGL.so.1.2 (in catalyst folder) to libGL.so.1.2.bak (in usr/lib64/ folder), original file. And I can not start 3d software. Can I stop that from happening somehow? Why is that happening at all?
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Dec 10, 2010
I'm trying to figure out how to tell the shell (tcsh) to remember when I've gone into a symlinked folder, and allow 'cd' to navigate back out of the symlink rather than just navigate to the parent directory of the linked-to folder...
For example:
$ ls -al /jobs
tech -> /mnt/projects1/tech
temp -> /mnt/projects2/temp
$ cd /jobs/tech
$ cd ../temp
../temp: No such file or directory.
$ pwd
/mnt/projects1/tech
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Jul 27, 2011
I'm wondering how I'd be able to symlink all the files in a dir structure and then also copy files of a certain extension in that dir. I'm basically symlinking all files within /foo/a,b,c to /bar/a,b,c and then copying over certain files with a certain extensions.
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Jul 26, 2010
I have mounted a samba share on my desktop from a remote server (with smb4k). There I created a symlink to "/". When I open the symlink with konqueror it opens the right one (the root directory of the server), but when i open this link with the shell (cd rootfs/), then it opens my local root directory (of my host)... Is it possible to open the right link with the shell?
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