#5285 closed enhancement (fixed)
Replace eudev with udev extracted from systemd
| Reported by: | Douglas R. Reno | Owned by: | Douglas R. Reno |
|---|---|---|---|
| Priority: | normal | Milestone: | 12.0 |
| Component: | Book | Version: | git |
| Severity: | normal | Keywords: | |
| Cc: |
Description
This ticket is to convert eudev to systemd-udev. See BLFS Ticket 18292 for details - but eudev is using libudev 243. libgudev now needs at least 247 because of using some newer API to properly handle tags.
The goal is to do similar to what was suggested back in #4914. I'll test this system with some libgudev consumers as well to make sure that this doesn't result in any problems.
Work on this will be done in the renodr/libudev-from-systemd branch
Change History (30)
comment:1 by , 10 months ago
| Owner: | changed from to |
|---|---|
| Status: | new → assigned |
comment:2 by , 10 months ago
comment:3 by , 10 months ago
I just looked at what we are installing now with eudev.
Two files in /sbin: udevadm and udevd One library: libudev.so.1.6.3 Two headers: libudev.h and udev.h
There are some files in /usr/lib/udev/ that are interesting. There are 11 binary files there like ata_id.
All the other files are .hwdb, rules, manpages, scripts, and other data type files.
comment:4 by , 10 months ago
| Summary: | Replace eudev with libudev extracted from systemd → Replace eudev with udev extracted from systemd |
|---|
Retitle because udev is not only a library.
follow-up: 6 comment:5 by , 10 months ago
I made a try in a VM but the boot process hangs starting udevd.
comment:6 by , 10 months ago
Replying to Xi Ruoyao:
I made a try in a VM but the boot process hangs starting udevd.
Alright, it's because I've installed udevadm into /usr/bin but LFS bootscript expects it in /sbin.
follow-ups: 8 10 17 comment:7 by , 10 months ago
My instruction:
# use systemd tarball
tar xf systemd-253.tar.gz
cd systemd-253
sed -i -e 's/GROUP="render"/GROUP="video"/' \
-e 's/GROUP="sgx", //' rules.d/50-udev-default.rules.in
# meson
# -Dlink-udev-shared=false is added so we won't need to install libsystemd-shared-253.so
# The other flags are same as systemd
mkdir -p build
cd build
meson setup \
--prefix=/usr \
--buildtype=release \
-Ddefault-dnssec=no \
-Dfirstboot=false \
-Dinstall-tests=false \
-Dldconfig=false \
-Dsysusers=false \
-Drpmmacrosdir=no \
-Dhomed=false \
-Duserdb=false \
-Dman=false \
-Dmode=release \
-Dpamconfdir=no \
-Ddev-kvm-mode=0660 \
-Ddocdir=/usr/share/doc/systemd-253 \
-Dlink-udev-shared=false
# build
ninja udevadm \
$(grep '^build' build.ninja | sed 's/build \([^:]*\).*/\1/' | grep -E "^src/libudev|^src/udev|^rules.d|^hwdb.d") \
$(realpath libudev.so --relative-to .)
# install
install -d -vm755 {/usr/lib,/etc}/udev/{hwdb,rules}.d
install -vm755 udevadm /usr/bin
ln -sv ../bin/udevadm /usr/sbin/udevd
install -vm755 libudev.so{,*[0-9]} /usr/lib
install -vm755 $(find src/udev -type f | grep -F -v ".") /usr/lib/udev
install -vm644 src/libudev/*.pc /usr/lib/pkgconfig
install -vm644 src/udev/*.pc /usr/share/pkgconfig
install -vm644 ../src/udev/udev.conf /etc/udev
install -vm644 rules.d/* ../rules.d/{*.rules,README} /usr/lib/udev/rules.d
install -vm644 hwdb.d/* ../hwdb.d/{*.hwdb,README} /usr/lib/udev/hwdb.d
# man pages
tar xf ../../systemd-man-pages-253.tar.xz --strip-components=1 -C /usr/share/man \
systemd-man-pages-253/{man3/libudev.3,man5/udev.conf.5,man7/{udev,hwdb}.7,man8/{systemd-udevd.service.8,udevadm}.8}
mv /usr/share/man/man8/{systemd-udevd.service,udevd}.8
# configuring: generate /etc/udev/hwdb.bin
udevadm hwdb --update
Note:
- udevadm is installed as /usr/bin/udevadm, not /usr/sbin/udevadm. So we need to edit the LFS bootscripts to call /bin/udevadm instead of /sbin/udevadm. I don't think we should really put udevadm into /usr/sbin because actually it can be used as a normal user (at least
udevadm settledoes not need any privilege). - Tested on a complete LFS system ("overwriting" eudev, and the system has MarkupSafe and Jinja2 installed), but not tested with a build from scratch yet.
follow-up: 9 comment:8 by , 10 months ago
Replying to Xi Ruoyao:
My instruction:
<snip>
Looks good but you forgot to include usr/include/libudev.h in the install.
comment:9 by , 10 months ago
comment:10 by , 10 months ago
Replying to Xi Ruoyao:
> # install
> install -d -vm755 {/usr/lib,/etc}/udev/{hwdb,rules}.d
> install -vm755 udevadm /usr/bin
> ln -sv ../bin/udevadm /usr/sbin/udevd
> install -vm755 libudev.so{,*[0-9]} /usr/lib
> install -vm755 $(find src/udev -type f | grep -F -v ".") /usr/lib/udev
> install -vm644 src/libudev/*.pc /usr/lib/pkgconfig
> install -vm644 src/udev/*.pc /usr/share/pkgconfig
> install -vm644 ../src/udev/udev.conf /etc/udev
> install -vm644 rules.d/* ../rules.d/{*.rules,README} /usr/lib/udev/rules.d
> install -vm644 hwdb.d/* ../hwdb.d/{*.hwdb,README} /usr/lib/udev/hwdb.d
I did a manual DESTDIR install into /build/systemd/install/. I needed to
mkdir /build/systemd/install/usr/sbin and
mkdir -p /build/systemd/install/usr/share/pkgconfig
I want to validate the installed files against the current files installed by eudev. I'll report back what I find.
follow-up: 12 comment:11 by , 10 months ago
Needed mkdir $DEST/usr/bin/ Needed mkdir $DEST/usr/lib/pkgconfig/ install -vm755 udevadm /usr/bin is missing a trailing /. Currently $ ll /usr/sbin/udev* -rwxr-xr-x 1 root root 364512 Jul 11 11:37 /usr/sbin/udevadm -rwxr-xr-x 1 root root 348160 Jul 11 11:37 /usr/sbin/udevd are different files, but above instructions have /usr/sbin/udevd -> ../bin/udevadm libudev.so and libudev.so.1 are not symlinks /usr/lib/udev/rules.d: 60-infiniband.rules is new 70-power-switch.rules is new 70-uaccess.rules is new 71-seat.rules is new 73-seat-late.rules is new 80-net-name-slot.rules is missing 80-net-setup-link.rules is new 90-vconsole.rules is new 99-systemd.rules is new README is new /usr/lib/udev/collect is missing There are no files in /etc/udev/hwdb.d. They appear to be in /usr/lib/udev/hwdb.d/ 60-autosuspend-chromiumos.hwdb is new /usr/include is missing. /usr/lib/libudev.la is mission (not a bad thing)
follow-up: 14 comment:12 by , 10 months ago
Replying to Bruce Dubbs:
install -vm755 udevadm /usr/bin is missing a trailing /.
Hmm, why a trailing / is necessary here?
Currently $ ll /usr/sbin/udev* -rwxr-xr-x 1 root root 364512 Jul 11 11:37 /usr/sbin/udevadm -rwxr-xr-x 1 root root 348160 Jul 11 11:37 /usr/sbin/udevd are different files, but above instructions have /usr/sbin/udevd -> ../bin/udevadm
In a systemd installation it's a symlink:
$ readlink /usr/lib/systemd/systemd-udevd ../../bin/udevadm
libudev.so and libudev.so.1 are not symlinks
Ah it's wrong. I guess we need to use cp -av instead of install -vm755 here.
/usr/lib/udev/collect is missing
I can't find this file in the systemd build. What it is for?
There are no files in /etc/udev/hwdb.d. They appear to be in /usr/lib/udev/hwdb.d/
/etc/udev/{hwdb.d,rules.d} are designed to be "system administrator only". So in a fresh installation they should be empty. But lfs-udev installs 3 rules into /etc/udev/hwdb.d and I'm not sure if we should change it to /usr/lib/udev/hwdb.d instead.
60-autosuspend-chromiumos.hwdb is new
/usr/include is missing.
As Joe pointed out, I've forgotten to install the header(s) :(.
follow-up: 16 comment:13 by , 10 months ago
The install section should be updated:
# install
install -d -vm755 {/usr/lib,/etc}/udev/{hwdb,rules}.d
install -vm755 udevadm /usr/bin
ln -sv ../bin/udevadm /usr/sbin/udevd
cp -av libudev.so{,*[0-9]} /usr/lib # <===== Ensure libudev.so and libudev.so.1 are symlinks
install -vm644 ../src/libudev/libudev.h /usr/include/libudev.h # <===== Install the header
install -vm755 $(find src/udev -type f | grep -F -v ".") /usr/lib/udev
install -vm644 src/libudev/*.pc /usr/lib/pkgconfig
install -vm644 src/udev/*.pc /usr/share/pkgconfig
install -vm644 ../src/udev/udev.conf /etc/udev
install -vm644 rules.d/* ../rules.d/{*.rules,README} /usr/lib/udev/rules.d
install -vm644 hwdb.d/* ../hwdb.d/{*.hwdb,README} /usr/lib/udev/hwdb.d
Eudev also installs udev.h, but I cannot find it in systemd tree.
follow-up: 15 comment:14 by , 10 months ago
Replying to Xi Ruoyao:
Replying to Bruce Dubbs:
install -vm755 udevadm /usr/bin is missing a trailing /.Hmm, why a trailing / is necessary here?
If /usr/bin/ is missing in a DESDIR install, the file is named 'bin'.
Currently $ ll /usr/sbin/udev* -rwxr-xr-x 1 root root 364512 Jul 11 11:37 /usr/sbin/udevadm -rwxr-xr-x 1 root root 348160 Jul 11 11:37 /usr/sbin/udevd are different files, but above instructions have /usr/sbin/udevd -> ../bin/udevadmIn a systemd installation it's a symlink:
Perhaps it's OK then.
libudev.so and libudev.so.1 are not symlinksAh it's wrong. I guess we need to use cp -av instead of install -vm755 here.
/usr/lib/udev/collect is missingI can't find this file in the systemd build. What it is for?
$ /usr/lib/udev/collect --help collect [options] <checkpoint> <id> <idlist> Collect variables across events. -h --help Print this message -a --add Add ID <id> to the list <idlist> -r --remove Remove ID <id> from the list <idlist> -d --debug Debug to stderr Adds ID <id> to the list governed by <checkpoint>. <id> must be part of the list <idlist>. If all IDs given by <idlist> are listed (ie collect has been invoked for each ID in <idlist>) collect returns 0, the number of missing IDs otherwise. On error a negative number is returned.
I do not know how to use this or if it it is needed at all.
There are no files in /etc/udev/hwdb.d. They appear to be in /usr/lib/udev/hwdb.d/
/etc/udev/{hwdb.d,rules.d} are designed to be "system administrator only". So in a fresh installation they should be empty. But lfs-udev installs 3 rules into /etc/udev/hwdb.d and I'm not sure if we should change it to /usr/lib/udev/hwdb.d instead.
I'm good with using /etc for the LFS specific files.
comment:15 by , 10 months ago
Replying to Bruce Dubbs:
$ /usr/lib/udev/collect --help collect [options] <checkpoint> <id> <idlist> Collect variables across events. -h --help Print this message -a --add Add ID <id> to the list <idlist> -r --remove Remove ID <id> from the list <idlist> -d --debug Debug to stderr Adds ID <id> to the list governed by <checkpoint>. <id> must be part of the list <idlist>. If all IDs given by <idlist> are listed (ie collect has been invoked for each ID in <idlist>) collect returns 0, the number of missing IDs otherwise. On error a negative number is returned.I do not know how to use this or if it it is needed at all.
In systemd it's dropped in https://github.com/systemd/systemd/pull/9920/, the maintainer considered it "nonsense". The removal happens almost 5 years ago, if something depended on it the systemd revision would already blow up. So I think we can just leave it...
comment:16 by , 10 months ago
Replying to Xi Ruoyao:
The install section should be updated:
# install install -d -vm755 {/usr/lib,/etc}/udev/{hwdb,rules}.d install -vm755 udevadm /usr/bin ln -sv ../bin/udevadm /usr/sbin/udevd cp -av libudev.so{,*[0-9]} /usr/lib # <===== Ensure libudev.so and libudev.so.1 are symlinks install -vm644 ../src/libudev/libudev.h /usr/include/libudev.h # <===== Install the header install -vm755 $(find src/udev -type f | grep -F -v ".") /usr/lib/udev install -vm644 src/libudev/*.pc /usr/lib/pkgconfig install -vm644 src/udev/*.pc /usr/share/pkgconfig install -vm644 ../src/udev/udev.conf /etc/udev install -vm644 rules.d/* ../rules.d/{*.rules,README} /usr/lib/udev/rules.d install -vm644 hwdb.d/* ../hwdb.d/{*.hwdb,README} /usr/lib/udev/hwdb.dEudev also installs
udev.h, but I cannot find it in systemd tree.
Hmm, the eudev udev.h is completely unusable. It contains things like
#include "libudev-private.h"
But libudev-private.h is not installed anywhere. So it's already broken and dropping it should be fine.
follow-up: 19 comment:17 by , 10 months ago
Replying to Xi Ruoyao:
My instruction:
... Note:
- udevadm is installed as /usr/bin/udevadm, not /usr/sbin/udevadm. So we need to edit the LFS bootscripts to call /bin/udevadm instead of /sbin/udevadm. I don't think we should really put udevadm into /usr/sbin because actually it can be used as a normal user (at least
udevadm settledoes not need any privilege).
We should also keep the mkinitramfs script (BLFS) in mind - it does some checks if and where to find udevadm and some other udev-files. Maybe that has to be tweaked.
comment:18 by , 10 months ago
The LFS change is queued in xry111/systemd-udevd-for-sysv.
Installed files:
/etc/udev/hwdb.bin 11878541 root:root 444 /etc/udev/rules.d/55-lfs.rules 525 root:root 644 /etc/udev/rules.d/81-cdrom.rules 204 root:root 644 /etc/udev/rules.d/83-cdrom-symlinks.rules 551 root:root 644 /etc/udev/udev.conf 305 root:root 644 /usr/bin/udev-hwdb 225896 root:root 755 /usr/bin/udevadm 1669248 root:root 755 /usr/include/libudev.h 9798 root:root 644 /usr/lib/libudev.so 12 root:root 777 libudev.so.1 /usr/lib/libudev.so.1 16 root:root 777 libudev.so.1.7.6 /usr/lib/libudev.so.1.7.6 308192 root:root 755 /usr/lib/pkgconfig/libudev.pc 569 root:root 644 /usr/lib/udev/ata_id 136400 root:root 755 /usr/lib/udev/cdrom_id 160968 root:root 755 /usr/lib/udev/dmi_memory_id 151384 root:root 755 /usr/lib/udev/fido_id 212608 root:root 755 /usr/lib/udev/hwdb.d/20-OUI.hwdb 2519164 root:root 644 /usr/lib/udev/hwdb.d/20-acpi-vendor.hwdb 153543 root:root 644 /usr/lib/udev/hwdb.d/20-bluetooth-vendor-product.hwdb 140340 root:root 644 /usr/lib/udev/hwdb.d/20-dmi-id.hwdb 832 root:root 644 /usr/lib/udev/hwdb.d/20-net-ifname.hwdb 111 root:root 644 /usr/lib/udev/hwdb.d/20-pci-classes.hwdb 15708 root:root 644 /usr/lib/udev/hwdb.d/20-pci-vendor-model.hwdb 3561723 root:root 644 /usr/lib/udev/hwdb.d/20-sdio-classes.hwdb 783 root:root 644 /usr/lib/udev/hwdb.d/20-sdio-vendor-model.hwdb 4181 root:root 644 /usr/lib/udev/hwdb.d/20-usb-classes.hwdb 8070 root:root 644 /usr/lib/udev/hwdb.d/20-usb-vendor-model.hwdb 1480035 root:root 644 /usr/lib/udev/hwdb.d/20-vmbus-class.hwdb 1810 root:root 644 /usr/lib/udev/hwdb.d/60-autosuspend-chromiumos.hwdb 2218 root:root 644 /usr/lib/udev/hwdb.d/60-autosuspend-fingerprint-reader.hwdb 6478 root:root 644 /usr/lib/udev/hwdb.d/60-autosuspend.hwdb 2438 root:root 644 /usr/lib/udev/hwdb.d/60-evdev.hwdb 24936 root:root 644 /usr/lib/udev/hwdb.d/60-input-id.hwdb 2427 root:root 644 /usr/lib/udev/hwdb.d/60-keyboard.hwdb 97840 root:root 644 /usr/lib/udev/hwdb.d/60-seat.hwdb 1119 root:root 644 /usr/lib/udev/hwdb.d/60-sensor.hwdb 42703 root:root 644 /usr/lib/udev/hwdb.d/70-analyzers.hwdb 1243 root:root 644 /usr/lib/udev/hwdb.d/70-av-production.hwdb 2860 root:root 644 /usr/lib/udev/hwdb.d/70-cameras.hwdb 679 root:root 644 /usr/lib/udev/hwdb.d/70-joystick.hwdb 1751 root:root 644 /usr/lib/udev/hwdb.d/70-mouse.hwdb 25014 root:root 644 /usr/lib/udev/hwdb.d/70-pda.hwdb 926 root:root 644 /usr/lib/udev/hwdb.d/70-pointingstick.hwdb 7712 root:root 644 /usr/lib/udev/hwdb.d/70-touchpad.hwdb 2316 root:root 644 /usr/lib/udev/hwdb.d/80-ieee1394-unit-function.hwdb 48344 root:root 644 /usr/lib/udev/hwdb.d/README 518 root:root 644 /usr/lib/udev/init-net-rules.sh 3673 root:root 644 /usr/lib/udev/mtd_probe 56800 root:root 755 /usr/lib/udev/rule_generator.functions 3540 root:root 644 /usr/lib/udev/rules.d/50-udev-default.rules 5287 root:root 644 /usr/lib/udev/rules.d/60-autosuspend.rules 704 root:root 644 /usr/lib/udev/rules.d/60-block.rules 703 root:root 644 /usr/lib/udev/rules.d/60-cdrom_id.rules 1071 root:root 644 /usr/lib/udev/rules.d/60-drm.rules 413 root:root 644 /usr/lib/udev/rules.d/60-evdev.rules 1093 root:root 644 /usr/lib/udev/rules.d/60-fido-id.rules 491 root:root 644 /usr/lib/udev/rules.d/60-infiniband.rules 379 root:root 644 /usr/lib/udev/rules.d/60-input-id.rules 282 root:root 644 /usr/lib/udev/rules.d/60-persistent-alsa.rules 616 root:root 644 /usr/lib/udev/rules.d/60-persistent-input.rules 2719 root:root 644 /usr/lib/udev/rules.d/60-persistent-storage-tape.rules 2204 root:root 644 /usr/lib/udev/rules.d/60-persistent-storage.rules 9371 root:root 644 /usr/lib/udev/rules.d/60-persistent-v4l.rules 769 root:root 644 /usr/lib/udev/rules.d/60-sensor.rules 1618 root:root 644 /usr/lib/udev/rules.d/60-serial.rules 1136 root:root 644 /usr/lib/udev/rules.d/64-btrfs.rules 616 root:root 644 /usr/lib/udev/rules.d/70-camera.rules 281 root:root 644 /usr/lib/udev/rules.d/70-joystick.rules 432 root:root 644 /usr/lib/udev/rules.d/70-memory.rules 184 root:root 644 /usr/lib/udev/rules.d/70-mouse.rules 734 root:root 644 /usr/lib/udev/rules.d/70-power-switch.rules 576 root:root 644 /usr/lib/udev/rules.d/70-touchpad.rules 473 root:root 644 /usr/lib/udev/rules.d/70-uaccess.rules 3366 root:root 644 /usr/lib/udev/rules.d/71-seat.rules 3818 root:root 644 /usr/lib/udev/rules.d/73-seat-late.rules 643 root:root 644 /usr/lib/udev/rules.d/75-net-description.rules 452 root:root 644 /usr/lib/udev/rules.d/75-probe_mtd.rules 174 root:root 644 /usr/lib/udev/rules.d/78-sound-card.rules 4816 root:root 644 /usr/lib/udev/rules.d/80-drivers.rules 600 root:root 644 /usr/lib/udev/rules.d/80-net-setup-link.rules 295 root:root 644 /usr/lib/udev/rules.d/81-net-dhcp.rules 528 root:root 644 /usr/lib/udev/rules.d/90-vconsole.rules 489 root:root 644 /usr/lib/udev/rules.d/99-systemd.rules 5039 root:root 644 /usr/lib/udev/rules.d/README 435 root:root 644 /usr/lib/udev/scsi_id 164672 root:root 755 /usr/lib/udev/v4l_id 56656 root:root 755 /usr/lib/udev/write_cd_rules 3595 root:root 755 /usr/lib/udev/write_net_rules 4345 root:root 755 /usr/sbin/udevd 14 root:root 777 ../bin/udevadm /usr/share/doc/udev-20171102/lfs/55-lfs.txt 758 root:root 644 /usr/share/doc/udev-20171102/lfs/README 1040 root:root 644 /usr/share/man/man8/udev-hwdb.8 1980 root:root 644 /usr/share/man/man8/udevd.8 8297 root:root 644 /usr/share/pkgconfig/udev.pc 426 root:root 644
The list is generated by jhalfs and it seems not complete. The instruction installs many man pages into /usr/share/man/man3 (for documenting functions provided by libudev) but jhalfs does not list them.
comment:19 by , 10 months ago
Replying to thomas:
Replying to Xi Ruoyao:
My instruction:
... Note:
- udevadm is installed as /usr/bin/udevadm, not /usr/sbin/udevadm. So we need to edit the LFS bootscripts to call /bin/udevadm instead of /sbin/udevadm. I don't think we should really put udevadm into /usr/sbin because actually it can be used as a normal user (at least
udevadm settledoes not need any privilege).We should also keep the
mkinitramfsscript (BLFS) in mind - it does some checks if and where to find udevadm and some other udev-files. Maybe that has to be tweaked.
The script has:
# Systemd installs udevadm in /bin. Other udev implementations have it in /sbin if [ -x /usr/bin/udevadm ] ; then binfiles="$binfiles udevadm"; fi
So it should work.
comment:20 by , 10 months ago
Did more testing and so far the only issue I've noticed is that nothing is getting logged. This is probably because by default all systemd services log to the journal so udev is trying doing the same. There are options to override the logging but that is with using the StandardOutput=/StandardError= options in the service unit file. It doesn't help here because the udev daemon isn't started by systemd.
comment:21 by , 10 months ago
I'm not sure this is working. On my workstation with eudev I can plug in a USB drive and it shows up as /dev/sdc. On my development system with the new udev from systemd, I see no changes to /dev/when plugging in the same drive.
On my workstation:
Jul 16 16:56:48 lfs11 kernel: [432469.962478] sd 8:0:0:0: [sdc] Synchronizing SCSI cache
On my development system -- nothing.
follow-up: 25 comment:22 by , 10 months ago
Correction. On my development system it was a HW problem. Probably a loose cable on my USB hub. Now the new udev recognizes when the drive is plugged in and removed.
Also, I don't understand Joe's comment about logging. At least as far as a USB drive goes, the messages are from the kernel and they show up fine. What udev specific message(s) should I be looking for?
comment:23 by , 10 months ago
Bruce, can you look for /lib/udev/rules.d/70-power-switch.rules? I read from Gentoo that it may interfere with elogind, so we might want to remove it and let elogind install its version.
comment:24 by , 10 months ago
The udev version has:
ACTION=="remove", GOTO="power_switch_end"
SUBSYSTEM=="input", KERNEL=="event*", ENV{ID_INPUT_SWITCH}=="1", TAG+="power-switch"
SUBSYSTEM=="input", KERNEL=="event*", ENV{ID_INPUT_KEY}=="1", TAG+="power-switch"
LABEL="power_switch_end"
I'm not familiar with the TAG reference and I don't know where the ID_INPUT* variables would be set.
After elogind I have:
ACTION=="remove", GOTO="power_switch_end"
SUBSYSTEM=="input", KERNEL=="event*", ENV{ID_INPUT_SWITCH}=="1", TAG+="power-switch"
SUBSYSTEM=="input", KERNEL=="event*", ENV{ID_INPUT_KEY}=="1", TAG+="power-switch"
#if 1 /// elogind supports eudev and needs some extra rules.
SUBSYSTEM=="input", KERNEL=="event*", SUBSYSTEMS=="acpi", TAG+="power-switch"
SUBSYSTEM=="input", KERNEL=="event*", KERNELS=="thinkpad_acpi", TAG+="power-switch"
SUBSYSTEM=="input", KERNEL=="event*", ATTRS{name}=="twl4030_pwrbutton", TAG+="power-switch"
SUBSYSTEM=="input", KERNEL=="event*", ATTRS{name}=="tps65217_pwr_but", TAG+="power-switch"
SUBSYSTEM=="input", KERNEL=="event*", ATTRS{name}=="* WMI hotkeys", TAG+="power-switch"
#endif // 1
LABEL="power_switch_end"
Personally I rarely use the power switch to turn off the computer. I do it with the poweroff command or via a menu item. It may be more useful on a laptop though.
comment:25 by , 10 months ago
Replying to Bruce Dubbs:
Correction. On my development system it was a HW problem. Probably a loose cable on my USB hub. Now the new udev recognizes when the drive is plugged in and removed.
Also, I don't understand Joe's comment about logging. At least as far as a USB drive goes, the messages are from the kernel and they show up fine. What udev specific message(s) should I be looking for?
During the boot:
* Setting hostname to lfs-udev ... [OK]
Populating /dev with device nodes... Starting systemd-udevd version 253
* ... [OK]
I suppose the "Starting systemd-udevd" line should be sent to system journal, not stderr. But I've not figured out how yet.
follow-up: 27 comment:26 by , 10 months ago
I didn't notice that before. I suppose we need:
sed -i "/Starting/s|||" src/udev/udevd.c
follow-up: 28 comment:27 by , 10 months ago
Replying to Bruce Dubbs:
I didn't notice that before. I suppose we need:
sed -i "/Starting/s|||" src/udev/udevd.c
diff --git a/bootscripts/lfs/init.d/udev b/bootscripts/lfs/init.d/udev
index 612685af7..f7d4b9bff 100644
--- a/bootscripts/lfs/init.d/udev
+++ b/bootscripts/lfs/init.d/udev
@@ -45,7 +45,7 @@ case "${1}" in
# Start the udev daemon to continually watch for, and act on,
# uevents
- /sbin/udevd --daemon
+ SYSTEMD_LOG_TARGET=kmsg /sbin/udevd --daemon
# Now traverse /sys in order to "coldplug" devices that have
# already been discovered
This will make the logging work. Ideally we should use the "syslog" target here, but when udevd starts sysklogd is not started yet so we have to use "kmsg".
comment:28 by , 10 months ago
Replying to Xi Ruoyao:
Replying to Bruce Dubbs:
I didn't notice that before. I suppose we need:
sed -i "/Starting/s|||" src/udev/udevd.c
diff --git a/bootscripts/lfs/init.d/udev b/bootscripts/lfs/init.d/udev index 612685af7..f7d4b9bff 100644 --- a/bootscripts/lfs/init.d/udev +++ b/bootscripts/lfs/init.d/udev @@ -45,7 +45,7 @@ case "${1}" in # Start the udev daemon to continually watch for, and act on, # uevents - /sbin/udevd --daemon + SYSTEMD_LOG_TARGET=kmsg /sbin/udevd --daemon # Now traverse /sys in order to "coldplug" devices that have # already been discoveredThis will make the logging work. Ideally we should use the "syslog" target here, but when udevd starts sysklogd is not started yet so we have to use "kmsg".
Viewing the log, there are two udev rules referring to systemd helper programs and they should be removed.
comment:29 by , 10 months ago
| Resolution: | → fixed |
|---|---|
| Status: | assigned → closed |
Fixed:
- r11.3-156-g2cbb6135e Merge branch 'xry111/systemd-udevd-for-sysv' into trunk
- r11.3-155-g51c7e709c udev: Update SBU and DU
- r11.3-154-gf24a041cd udev: Remove two udev rules requiring a full systemd installation
- r11.3-153-g870d24c5c bootscripts: udev: Set SYSTEMD_LOG_TARGET=kmsg for udevd
- r11.3-152-g06610cefa dependencies: Update for Udev
- r11.3-151-g4ca4e8b1b udev: Fix a typo
- r11.3-150-gf7c36d049 udev: Create /usr/{lib,share}/pkgconfig
- r11.3-149-gcce6c9246 udev: Install man pages from systemd man pages tarball
- r11.3-148-g13288b916 SysV: Add MarkupSafe and Jinja2
- r11.3-147-ga28986066 Replace eudev with udev from systemd
- r11.3-146-gc7ee38fb5 bootscripts: Use /bin/udevadm instead of /sbin/udevadm
This lfs-dev thread from 2 years ago addressed that: https://lists.linuxfromscratch.org/sympa/arc/lfs-dev/2021-08/msg00132.html