5 The last WAIT_FOR_SYSFS rule is removed from the default rules.
7 The symlinks to udevadm for the debugging tools: udevmonitor and
8 udevtest are no longer created.
10 The symlinks to the udevadm man page for the old tool names are
13 Abstract namespace sockets paths in RUN+="socket:@<path>" rules,
14 should be prefixed with '@' to indicate that the path is not a
25 Udevstart is removed from the tree, it did not get installed for
26 a long time now, and is long replaced by trigger and settle.
32 All udev tools are merged into a single binary called udevadm.
33 The old names of the tools are built-in commands in udevadm now.
34 Symlinks to udevadm, with the names of the old tools, provide
35 the same functionality as the standalone tools. There is also
36 only a single udevadm.8 man page left for all tools.
38 Tools like mkinitramfs should be checked, if they need to include
39 udevadm in the list of files.
49 The etc/udev/rules.d/ directory now contains a default set of basic
50 udev rules. This initial version is the result of a rules file merge
51 of Fedora and openSUSE. For these both distros only a few specific
52 rules are left in their own file, named after the distro. Rules which
53 are optionally installed, because they are only valid for a specific
54 architecture, or rules for subsystems which are not always used are
55 in etc/udev/packages/.
61 Dynamic rules can be created in /dev/.udev/rules.d/ to trigger
62 actions by dynamically created rules.
64 SYMLINK=="<value>" matches agains the entries in the list of
65 currently defined symlinks. The links are not created in the
66 filesystem at that point in time, but the values can be matched.
68 RUN{ignore_error}+="<program>" will ignore any exit code from the
69 program and not record as a failed event.
75 Final merge of patches/features from the Ubuntu package.
81 Control characters in filesystem label strings are no longer silenty
82 removed, but hex-encoded, to be able to uniquely identify the device
83 by its symlink in /dev/disk/by-label/.
84 If libvolume_id is used by mount(8), LABEL= will work as expected,
85 if slashes or other characters are used in the label string.
87 To test the existence of a file, TEST=="<file>" and TEST!="<file>"
88 can be specified now. The TEST key accepts an optional mode mask
89 TEST{0100}=="<is executable file>".
91 Scsi_id now supports a mode without expecting scsi-specific sysfs
92 entries to allow the extraction of cciss-device persistent properties.
98 In the future, we may see uuid's which are just simple character
99 strings (see the DDF Raid Specification). For that reason vol_id now
100 exports ID_FS_UUID_SAFE, just like ID_FS_LABEL_SAFE. For things like
101 the creation of symlinks, the *_SAFE values ensure, that no control
102 or whitespace characters are used in the filename.
104 Possible users of libvolume_id, please use the volume_id_get_* functions.
105 The public struct will go away in a future release of the library.
111 Removal of useless extras/eventrecorder.sh.
121 The directory multiplexer for dev.d/ and hotplug.d are finally removed
122 from the udev package.
128 Symlinks can have priorities now, the priority is assigned to the device
129 and specified with OPTIONS="link_priority=100". Devices with higher
130 priorities overwrite the symlinks of devices with lower priorities.
131 If the device that currently owns the link, goes away, the symlink
132 will be removed, and recreated, pointing to the next device with the
133 highest actual priority. This should make /dev/disk/by-{label,uuid,id}
134 more reliable, if multiple devices contain the same metadata and overwrite
137 The dasd_id program is removed from the udev tree, and dasdinfo, with the
138 needed rules, are part of the s390-tools now.
140 Please add KERNEL=="[0-9]*:[0-9]*" to the scsi wait-for-sysfs rule,
141 we may get the scsi sysfs mess fixed some day, and this will only catch
142 the devices we are looking for.
144 USB serial numbers for storage devices have the target:lun now appended,
145 to make it possibble to distinguish broken multi-lun devices with all
146 the same SCSI identifiers.
148 Note: The extra "run_directory" which searches and executes stuff in
149 /etc/hotplug.d/ and /etc/dev.d/ is long deprecated, and will be removed
150 with the next release. Make sure, that you don't use it anymore, or
151 provides your own implementation of that inefficient stuff.
152 We are tired of reports about a "slow udev", because these directories
153 contain stuff, that runs with _every_ event, instead of using rules,
154 that run programs only for the matching events.
164 DRIVER== will match only for devices that actually have a real
165 driver. DRIVERS== must be used, if parent devices should be
166 included in the match.
168 Libvolume_id's "linux_raid" detection needed another fix.
176 Add additional check to volume_id detection of via_raid, cause
177 some company decided to put a matching pattern all over the empty
178 storage area of their music players.
182 Fix path_id for SAS devices.
186 The udev daemon can be started with --debug-trace now, which will
187 execute all events serialized to get a chance to catch a possible
188 action that crashes the box.
190 A warning is logged, if PHYSDEV* keys, the "device" link, or a parent
191 device attribute like $attr{../file} is used, only WAIT_FOR_SYSFS rules
192 are excluded from the warning. Referencing parent attributes directly
193 may break when something in the kernel driver model changes. Udev will
194 just find the attribute by walking up the parent chain.
196 Udevtrigger now sorts the list of devices depending on the device
197 dependency, so a "usb" device is triggered after the parent "pci"
202 Revert persistent-storage ata-serial '_' '-' replacement.
208 Udevtrigger can now filter the list of devices to be triggered. Matches
209 for subsystems or sysfs attributes can be specified.
211 The entries in /dev/.udev/queue and /dev/.udev/failed have changed to
212 zero-sized files to avoid pointing to /sys and confuse broken tools which
213 scan the /dev directory. To retry failed events, udevtrigger --retry-failed
216 The rules and scripts to create udev rules for persistent network
217 devices and optical drives are in the extras/rules_generator directory
218 now. If you use something similar, please consider replacing your own
219 version with this, to share the support effort. The rule_generator
220 installs its own rules into /etc/udev/rules.d.
222 The cdrom_id tool installs its own rule now in /etc/udev/rules.d, cause
223 the rule_generator depends on cdrom_id to be called in an earlier rule.
229 Renaming of some key names (the old names still work):
230 BUS -> SUBSYSTEMS, ID -> KERNELS, SYSFS -> ATTRS, DRIVER -> DRIVERS.
231 (The behavior of the key DRIVER will change soon in one of the next
232 releases, to match only the event device, please switch to DRIVERS
233 instead. If DRIVER is used, it will behave like DRIVERS, but an error
235 With the new key names, we have a more consistent and simpler scheme.
236 We can match the properties of the event device only, with: KERNEL,
237 SUBSYSTEM, ATTR, DRIVER. Or include all the parent devices in the match,
238 with: KERNELS, SUBSYSTEMS, ATTRS, DRIVERS. ID, BUS, SYSFS, DRIVER are no
239 longer mentioned in the man page and should be switched in the rule
242 ATTR{file}="value" can be used now, to write to a sysfs file of the
243 event device. Instead of:
244 ..., SYSFS{type}=="0|7|14", RUN+="/bin/sh -c 'echo 60 > /sys$$DEVPATH/timeout'"
246 ..., ATTR{type}=="0|7|14", ATTR{timeout}="60"
248 All the PHYSDEV* keys are deprecated and will be removed from a
250 PHYDEVPATH - is the path of a parent device and should not be
252 PHYSDEVBUS - is just a SUBSYSTEM value of a parent, and can be
253 matched with SUBSYSTEMS==
254 PHYSDEVDRIVER - for bus devices it is available as ENV{DRIVER}.
255 Newer kernels will have DRIVER in the environment,
256 for older kernels udev puts in. Class device will
257 no longer carry this property of a parent and
258 DRIVERS== can be used to match such a parent value.
259 Note that ENV{DRIVER} is only available for a few bus devices, where
260 the driver is already bound at device event time. On coldplug, the
261 events for a lot devices are already bound to a driver, and they will have
262 that value set. But on hotplug, at the time the kernel creates the device,
263 it can't know what driver may claim the device after that, therefore
264 in most cases it will be empty.
266 Failed events should now be re-triggered with:
267 udevtrigger --retry-failed.
268 Please switch to this command, so we keep the details of the /dev/.udev/failed/
269 files private to the udev tools. We may need to switch the current symlink
270 target, cause some obviously broken tools try to scan all files in /dev
271 including /dev/.udev/, find the links to /sys and end up stat()'ing sysfs files
272 million times. This takes ages on slow boxes.
274 The udevinfo attribute walk (-a) now works with giving a device node
275 name (-n) instead of a devpath (-p). The query now always works, also when
276 no database file was created by udev.
278 The built-in /etc/passwd /etc/group parser is removed, we always depend on
279 getpwnam() and getgrnam() now. One of the next releases will depend on
280 fnmatch() and may use getopt_long().
284 Bugfixes and small improvements.
288 Fix path_id for recent kernels.
294 Added support for swapping network interface names, by temporarily
295 renaming the device and wait for the target name to become free.
299 The built-in MODALIAS key and substitution is removed.
303 The binary firmware helper is replaced by the usual simple
304 shell script. Udevsend is removed from the tree.
312 Some more keys require the correct use of '==' and '=' depending
313 on the kind of operation beeing an assignment or a match. Rules
314 with invalid operations are skipped and logged to syslog. Please
315 test with udevtest if the parsing of your rules throws errors and
316 fix possibly broken rules.
320 Provide "udevsettle" to wait for all current udev events to finish.
321 It also watches the current kernel netlink queue by comparing the
322 even sequence number to make sure that there are no current pending
323 events that have not already arrived in the daemon.
327 Fix rule to skip persistent rules for removable IDE devices, which
328 also skipped optical IDE drives.
330 All *_id program are installed in /lib/udev/ by default now.
332 No binary is stripped anymore as this should be done in the
333 packaging process and not at build time.
335 libvolume_id is provided as a shared library now and vol_id is
336 linked against it. Also one of the next HAL versions will require
337 this library, and the HAL build process will also require the
338 header file to be installed. The copy of the same code in HAL will
339 be removed to have only a single copy left on the system.
343 Add persistent links for SCSI tapes. The rules file is renamed
344 to 60-persistent-storage.rules.
346 Create persistent path for usb devices. Can be used for all sorts
347 of devices that can't be distinguished by other properties like
348 multiple identical keyboards and mice connected to the same box.
350 Provide "udevtrigger" program to request events on coldplug. The
351 shell script is much too slow with thousends of devices.
355 Fix persistent disk rules to exclude removable IDE drives.
357 Warn if %e, $modalias or MODALIAS is used.
361 Fix queue export, which wasn't correct for subsequent add/remove
362 events for the same device.
366 Fix cramfs detection on big endian.
368 Make WAIT_FOR_SYSFS usable in "normal" rules and silent if the whole
373 If BUS== and SYSFS{}== have been used in the same rule, the sysfs
374 attributes were only checked at the parent device that matched the
375 by BUS requested subsystem. Fix it to also look at the device we
376 received the event for.
378 Build variable CROSS has changed to CROSS_COMPILE to match the kernel
383 Fix a bug where NAME="" would prevent RUN from beeing executed.
385 RUN="/bin/program" does not longer automatically add the subsystem
386 as the first parameter. This is from the days of /sbin/hotplug
387 which is dead now and it's just confusing to need to add a space at
388 the end of the program name to prevent this.
389 If you use rules that need the subsystem as the first parameter,
390 like the old "udev_run_hotlugd" and "udev_run_devd", add the subsystem
391 to the key like RUN+="/bin/program $env{SUBSYSTEM}".
395 The udev man page has moved to udev(7) as it does not describe a command
396 anymore. The programs udev, udevstart and udevsend are no longer installed
397 by default and must be copied manually, if they should be installed or
398 included in a package.
400 Fix a bug where "ignore_device" could run earlier collected RUN keys before
401 the ignore rule was applied.
403 More preparation for future sysfs changes. usb_id and scsi_id no longer
404 depend on a magic order of devices in the /devices chain. Specific devices
405 should be requested by their subsytem.
407 This will always find the scsi parent device without depending on a specific
409 dev = sysfs_device_get(devpath);
410 dev_usb = sysfs_device_get_parent_with_subsystem(dev, "scsi");
412 The "device" link in the current sysfs layout will be automatically
413 _resolved_ as a parent and in the new sysfs layout it will just _be_ the
414 parent in the devpath. If a device is requested by it's symlink, like all
415 class devices in the new sysfs layout will look like, it gets automatically
416 resolved and substituted with the real devpath and not the symlink path.
419 A similar logic must be applied to _all_ sysfs users, including
420 scripts, that search along parent devices in sysfs. The explicit use of
421 the "device" link must be avoided. With the future sysfs layout all
422 DEVPATH's will start with /devices/ and have a "subsystem" symlink poiting
423 back to the "class" or the "bus". The layout of the parent devices in
424 /devices is not necessarily expected to be stable across kernel releases and
425 searching for parents by their subsystem should make sysfs users tolerant
426 for changed parent chains.
430 Prepare udev to work with the experimental kernel patch, that moves
431 /sys/class devices to /sys/devices and /sys/block to /sys/class/block.
433 Clarify BUS, ID, $id usage and fix $id behavior. This prepares for
434 moving the class devices to /sys/devices.
436 Thanks again to Marco for help finding a hopefully nice compromise
437 to make %b simpler and working again.
441 Complete removal of libsysfs, replaced by simple helper functions
442 which are much simpler and a bit faster. The udev daemon operatesentirely
443 on event parameters and does not use sysfs for simple rules anymore.
444 Please report any new bugs/problems, that may be caused by this big
445 change. They will be fixed immediately.
447 The enumeration format character '%e' is deprecated and will be
448 removed sometimes from a future udev version. It never worked correctly
449 outside of udevstart, so we can't use it with the new parallel
450 coldplug. A simple enumeration is as useless as the devfs naming
451 scheme, just get rid of both if you still use it.
453 MODALIAS and $modalias is not needed and will be removed from one of
454 the next udev versions, replace it in all rules with ENV{MODALIAS} or
455 the sysfs "modalias" value.
457 Thanks a lot to Marco for all his help on finding and fixing bugs.
461 Let scsi_id request libata drive serial numbers from page 0x80.
463 Renamed etc/udev/persistent.rules to persistent-disk.rules and
464 added /dev/disk/by-name/* for device mapper device names.
466 Removed %e from the man page. It never worked reliably outside
467 of udevstart and udevstart is no longer recommended to use.
471 Symlinks are now exported to the event environment. Hopefully it's no
472 longer needed to run udevinfo from an event process, like it was
473 mentioned on the hotplug list:
474 UDEV [1134776873.702967] add@/block/sdb
477 DEVLINKS=/dev/disk/by-id/usb-IBM_Memory_Key_0218B301030027E8 /dev/disk/by-path/usb-0218B301030027E8:0:0:0
481 Fix a problem if udevsend is used as the hotplug handler and tries to use
482 syslog, which causes a "vc" event loop. 2.6.15 will make udevsend obsolete
483 and this kind of problems will hopefully go away soon.
487 All built-in logic to work around bad sysfs timing is removed with this
488 version. The need to wait for sysfs files is almost fixed with a kernel
489 version that doesn't work with this udev version anyway. Until we fix
490 the timing of the "bus" link creation, the former integrated logic should
491 be emulated by a rule placed before all other rules:
492 ACTION=="add", DEVPATH=="/devices/*", ENV{PHYSDEVBUS}=="?*", WAIT_FOR_SYSFS="bus"
494 The option "udev_db" does no longer exist. All udev state will be in
495 /$udev_root/.udev/ now, there is no longer an option to set this
497 If the init script or something else used this value, just depend on
498 this hardcoded path. But remember _all_content_ of this directory is
499 still private to udev and can change at any time.
501 Default location for rule sripts and helper programs is now: /lib/udev/.
502 Everything that is not useful on the commandline should go into this
503 directory. Some of the helpers in the extras folder are installed there
504 now. The rules need to be changed, to find the helpers there.
506 Also /lib/udev/devices is recommended as a directory where packages or
507 the user can place real device nodes, which get copied over to /dev at
508 every boot. This should replace the various solutions with custom config
511 Udevsend does no longer start the udev daemon. This must be done with
512 the init script that prepares /dev on tmpfs and creates the initial nodes,
513 before starting the daemon.
517 Silent a too verbose error logging for the old hotplug.d/ dev.d/
520 The copy of klibc is removed. A systemwide installed version of klibc
521 should be used to build a klibc udev now.
525 NAME="" will not create any nodes, but execute RUN keys. To completely
526 ignore an event the OPTION "ignore_device" should be used.
528 After removal of the reorder queue, events with a TIMEOUT can be executed
529 without any queuing now.
533 Fixed bug in udevd, if inotify is not available. We depend on netlink
534 uevents now, kernels without that event source will not work with that
535 version of udev anymore.
539 The rule parsing happens now in the daemon once at startup, all udev
540 event processes inherit the already parsed rules from the daemon.
541 It is shipped with SUSE10.0 and reduces heavily the system load at
542 startup. The option to save precompiled rules and let the udev process
543 pick the them up is removed, as it's no longer needed.
545 Kernel 2.6.15 will have symlinks at /class/input pointing to the real
546 device. Libsysfs is changed to "translate" the requested link into the
547 real device path, as it would happen with the hotplug event. Otherwise
548 device removal and the udev database will not work.
550 Using 'make STRIPCMD=' will leave the binaries unstripped for debugging
553 A few improvements for vol_id, the filesytem probing code.
557 Fix a stupid typo in extras/run_directory for "make install".
559 scsi_id creates the temporary devnode now in /dev for usage with a
560 non-writable /tmp directory.
562 The uevent kernel socket buffer can carry app. 50.000 events now,
563 let's see who can break this again. :)
565 The upcoming kernel will have a new input driver core integration.
566 Some class devices are now symlinks to the real device. libsysfs
567 needs a fix for this to work correctly. Udevstart of older udev
568 versions will _not_ create these devices!
572 Fix a 'install' target in the Makefile, that prevents EXTRAS from
577 A bunch of mostly trivial bugfixes. From now on no node name or
578 symlink name can contain any character than plain whitelisted ascii
579 characters or validated utf8 byte-streams. This is needed for the
580 /dev/disk/by-label/* links, because we import untrusted data and
581 export it to the filesystem.
585 More bugfixes. If udevd was started from the kernel, we don't
586 have stdin/stdout/stderr, which broke the forked tools in some
591 Bugfix. udevstart event ordering was broken for a long time.
592 The new run_program() uncovered it, because /dev/null was not
593 available while we try to run external programs.
594 Now udevstart should create it before we run anything.
598 Minor bugfixes and some distro rules updates. If you don't have the
599 persistent disk rules in /dev/disk/by-*/* on your distro, just
600 grab it from here. :)
604 We can use socket communication now to pass events from udev to
606 RUN+="socket:/org/freedesktop/hal/udev_event"
607 will pass the whole udev event to the HAL daemon without the need
608 for a forked helper. (See ChangeLog for udevmonitor, as an example)
612 Mostly bugfixes and see ChangeLog.
614 The test for the existence of an environment value should be
616 ENV{KEY}=="*" to ENV{KEY}=="?*"
617 because "*" will not fail anymore, if the key does not exist or
622 Bugfixes and a few tweaks described in the ChangeLog.
626 Mostly a Bugfix release.
628 Added WAIT_FOR_SYSFS="<attribute>" to be able to fight against the sysfs
629 timing with custom rules.
633 We changed the internal rule storage format. Our large rule files took
634 2 MB of RAM, with the change we are down to 99kB.
636 If the device-node has been created with default name and no symlink or
637 options are to remenber, it is not longer stored in the udevdb. HAL will
638 need to be updated to work correctly with that change.
640 To overrride optimization flags, OPTFLAGS may be used now.
648 Major changes happened with this release. The goal is to take over the
649 complete kernel-event handling and provide a more efficient way to dispatch
650 kernel events. Replacing most of the current shell script logic and the
651 kernel forked helper with a netlink-daemon and a rule-based event handling.
653 o udevd listens to netlink events now. The first valid netlink event
654 will make udevd ignore any message from udevsend that contains a
655 SEQNUM, to avoid duplicate events. The forked events can be disabled
657 echo "" > /proc/sys/kernel/hotplug
658 For full support, the broken input-subsytem needs to be fixed, not to
659 bypass the driver core.
661 o /etc/dev.d/ + /etc/hotplug.d/ directory multiplexing is completely
662 removed from udev itself and must be emulated by calling small
663 helper binaries provided in the extras folder:
664 make EXTRAS=extras/run_directory/
665 will build udev_run_devd and udev_run_hotplugd, which can be called
666 from a rule if needed:
667 RUN+="/sbin/udev_run_hotplugd"
668 The recommended way to handle this is to convert all the calls from
669 the directories to explicit udev rules and get completely rid of the
670 multiplexing. (To catch a ttyUSB event, you now no longer need to
671 fork and exit 300 tty script instances you are not interested in, it
672 is just one rule that matches exactly the device.)
674 o udev handles now _all_ events not just events for class and block
675 devices, this way it is possible to control the complete event
676 behavior with udev rules. Especially useful for rules like:
677 ACTION="add", DEVPATH="/devices/*", MODALIAS=="?*", RUN+="/sbin/modprobe $modalias"
679 o As used in the modalias rule, udev supports now textual
680 substitution placeholder along with the usual format chars. This
681 needs to be documented, for now it's only visible in udev_rules_parse.c.
683 o The rule keys support now more operations. This is documented in the
684 man page. It is possible to add values to list-keys like the SYMLINK
685 and RUN list with KEY+="value" and to clear the list by assigning KEY="".
686 Also "final"-assignments are supported by using KEY:="value", which will
687 prevent changing the key by any later rule.
689 o kernel 2.6.12 has the "detached_state" attribute removed from
690 sysfs, which was used to recognize sysfs population. We switched that
691 to wait for the "bus" link, which is only available in kernels after 2.6.11.
692 Running this udev version on older kernels may cause a short delay for
695 o To provide infrastructure for persistent device naming, the id programs:
696 scsi_id, vol_id (former udev_volume_id), and ata_id (new) are able now
697 to export the probed data in environment key format:
698 pim:~ # /sbin/ata_id --export /dev/hda
699 ID_MODEL=HTS726060M9AT00
700 ID_SERIAL=MRH401M4G6UM9B
704 KERNEL="hd*[!0-9]", IMPORT="/sbin/ata_id --export $tempnode"
705 KERNEL="hd*[!0-9]", ENV{ID_SERIAL}=="?*", SYMLINK+="disk/by-id/$env{ID_MODEL}_$env{ID_SERIAL}"
708 kay@pim:~> tree /dev/disk
711 | |-- HTS726060M9AT00_MRH401M4G6UM9B -> ../../hda
712 | `-- IBM-Memory_Key -> ../../sda
714 | |-- swap -> ../../hda1
715 | |-- date -> ../../sda1
716 | `-- home -> ../../hda3
718 |-- 2E08712B0870F2E7 -> ../../hda3
719 |-- 9352cfef-7687-47bc-a2a3-34cf136f72e1 -> ../../hda1
720 |-- E845-7A89 -> ../../sda1
721 `-- b2a61681-3812-4f13-a4ff-920d70604299 -> ../../hda2
723 The IMPORT= operation will import these keys in the environment and make
724 it available for later PROGRAM= and RUN= executed programs. The keys are
725 also stored in the udevdb and can be queried from there with one of the
728 o A few binaries are silently added to the repository, which can be used
729 to replay kernel events from initramfs instead of using coldplug. udevd
730 can be instructed now to queue-up events while the stored events from
731 initramfs are filled into the udevd-queue. This code is still under
732 development and there is no documentation now besides the code itself.
733 The additional binaries get compiled, but are not installed by default.
735 o There is also a temporary fix for a performance problem where too many
736 events happen in parallel and every event needs to parse the rules.
737 udev can now read precompiled rules stored on disk. This is likely to be
738 replaced by a more elegant solution in a future udev version.
742 With kernel version 2.6.12, the sysfs file "detached_state" was removed.
743 Fix for libsysfs not to expect this file was added.
747 All rules are applied now, but only the first matching rule with a NAME-key
748 will be applied. All later rules with NAME-key are completely ignored. This
749 way system supplied symlinks or permissions gets applied to user-defined
753 Please check your rules setup, if you may need to add OPTIONS="last_rule"
754 to some rules, to keep the old behavior.
756 The rules are read on "remove"-events too. That makes is possible to match
757 with keys that are available on remove (KERNEL, SUBSYSTEM, ID, ENV, ...) to
758 instruct udev to ignore an event (OPTIONS="ignore_device").
759 The new ACTION-key may be used to let a rule act only at a "remove"-event.
761 The new RUN-key supports rule-based execution of programs after device-node
762 handling. This is meant as a general replacement for the dev.d/-directories
763 to give fine grained control over the execution of programs.
765 The %s{}-sysfs format char replacement values are searched at any of the
766 devices in the device chain now, not only at the class-device.
768 We support log priority levels now. The value udev_log in udev.conf is used
769 to determine what is printed to syslog. This makes it possible to
770 run a version with compiled-in debug messages in a production environment
771 which is sometimes needed to find a bug.
772 It is still possible to supress the inclusion of _any_ syslog usage with
773 USE_LOG=false to create the smallest possible binaries if needed.
774 The configured udev_log value can be overridden with the environment variable
779 Possible use of a system-wide klibc:
780 make USE_KLIBC=true KLCC=/usr/bin/klcc all
781 will link against an external klibc and our own version will be ignored.
785 We support an unlimited count of symlinks now.
787 If USE_STATIC=true is passed to a glibc build, we link statically and use
788 a built-in userdb parser to resolve user and group names.
790 The PLACE= key is gone. It can be replaced by an ID= for a long time, because
791 we walk up the chain of physical devices to find a match.
793 The KEY="<value>" format supports '=', '==', '!=,' , '+=' now. This makes it
794 easy to skip certain attribute matches without composing rules with weird
795 character class negations like:
796 KERNEL="[!s][!c][!d]*"
797 this can now be replaced with:
799 The current simple '=' is still supported, and should work as it does today,
800 but existing rules should be converted if possible, to be better readable.
802 We have new ENV{}== key now, to match against a maximum of 5 environment
805 udevstart is its own binary again, because we don't need co carry this araound
806 with every forked event.
~ianmdlvl / elogind.git / blob