Property:watchdog (device)

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BoxMatrix >> System >> watchdog (device)

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Name-Collision - multiple objects in this wiki use the name watchdog! watchdog (bbcmd) Periodically write to the specified watchdog device. watchdog (device) Userspace device for controlling AVM-Watchdogs. watchdog (initscr) TODO watchdog (process) TODO

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Linux-Device

Device:	watchdog (device)   -   type Char	Wiki	Freetz	IPPF	whmf	AVM	Web
Location:	System >> Linux-Devices   -   Origin: AVM
Path:	Release: /dev, /dev* Lab+Rel: /dev, /dev*
Properties:	Maj/Min: 241/0, 241/0, 243/0, 242/0, 243/0, 244/0, 249/0, 245/0, 245/0, 247/0, 245/0, 250/0, 246/0, 247/0, 247/0, 249/0, 248/0, 248/0, 249/0, 248/0, 251/0, 249/0, 250/0, 251/0, 252/0, 253/0, 254/0   -   Firmware: 4.07 - 7.90
Function:	Userspace device for controlling AVM-Watchdogs.

Goto:   Commands  -  Dependencies   -   Model-Matrix   -   SMW-Browser

Details

watchdog is the userspace device for controlling AVM-Watchdogs. See the supported Commands below.
It is typically only accessed directly in scripts. Executables access it through libwdt.so.
Since fw 7.08 there is also the avm_watchdog command to access it from scripts.

watchdog is provided by ar7wdt_file.ko. Since fw 7.19 it is set up in watchdog (initscr) at boot time:

mknod -m 0660 /dev/watchdog c "${major}" 0
chown root:watchdog /dev/watchdog

The major is gathered by the major_nr script before.

AVM-Watchdogs:

• Commands: avm_watchdog, watchdog (initscr)
• Startup: S05-watchdog, rc.tail.sh, watchdog.service
• Devices: watchdog (device)
• Procfs: wdt
• Sources: avm_event_remotewatchdog
• Sinks: avm_event_remotewatchdog_sink
• Events: remotewatchdog
• Libraries: libwdt.so
• Bundles: ar7wdt.ko, avmwdt.ko, avm_sammel.ko, avm.ko
• Drivers: ar7wdt_main.ko, ar7wdt_file.ko
• Special: ar7wdt_hw_wdtremote.ko, ar7wdt_hw_shim.ko
• Hardware: wdtimer.ko, ar7wdt_hw.ko, ar7wdt_hw_26.ko
• Hardware: ifxmips_wdt.ko, ar7wdt_hw_puma.ko, davinci_watchdog_hw.ko
• Hardware: ikan_wdt.ko, grx_wdt.ko, brcm_wdt.ko, ath_wdt.ko, qcom_wdt.ko

Commands

The watchdog device can be used by one of these methods;

echo <command> [<arg>] > /dev/watchdog

avm_watchdog <command> [<arg>]

Registering

A watchdog is registered at start time of a process and released when it terminates gracefully

register <wdname>             # Register a new watchdog, def. timeout is 10-40s platf. dep.
release <wdname>              # Release a watchdog gracefully

Triggering

A watchdog needs to be triggered before the timeout expired to avoid a reboot.

trigger <wdname>              # Trigger the named watchdog
timeout <wdname> <timeout>    # Change the timeout of a watchdog with triggering it
time <wdname> <timeout>       # Change the timeout of a watchdog with triggering it

Disabling

For debugging purposes and during updates all watchdogs could be disabled:

disable                       # Disable all watchdogs
start                         # Start all watchdogs (again)

Init-Monitor

The System Init Monitor handles an anonymous watchdog to supervise the boot process of FRITZ!OS.

init-start [<timeout>]        # Start System Init Monitor - default 120 secs
init-done                     # End System Init Monitor 

In older fw these were called by scripts, 7272 fw 6.83:

S05-watchdog:   echo init-start 120 >/dev/watchdog
rc.tail.sh:     echo init-done >/dev/watchdog

Recent supervisor equipped firmware uses a different approach:

watchdog.service:   ExecStart=/sbin/avm_watchdog init-start 120

The init-done is passed by the watchdog_init_done function of libwdt.so which is called by the libsupervisor.so
function watchdog_all_loaded which is called by supervisor once all services are running.

Model-Matrix

Daily updated index of the presence, path and size of this device for each model. Last update: 2024-04-19 05:50 GMT.
Showing all models using this device. Click any column header (click-wait-click) to sort the list by the respective data.
The (main/scrpn/boot/arm/prx/atom) label in the Model column shows which CPU is meant for models with multiple Linux instances.
Note that this list is merged from Firmware-Probes of all known AVM firmware for a model, including Recovery.exe and Labor-Files.

Model	Firmw	Path	Maj/Min
FRITZ!Box 2110	4.52	/dev*	242/0
FRITZ!Box 2170	4.31 - 4.57	/dev*	242/0
FRITZ!Box SL WLAN	4.33 - 4.34	/dev, /dev*	242/0
FRITZ!Box WLAN 3020	4.33 - 4.34	/dev, /dev*	242/0
FRITZ!Box WLAN 3030	4.33 - 4.34	/dev*	242/0
FRITZ!Box WLAN 3050	4.07	/dev	254/0
FRITZ!Box WLAN 3070	4.15	/dev	254/0
FRITZ!Box WLAN 3130	4.34	/dev*	242/0
FRITZ!Box WLAN 3131	4.29 - 4.57	/dev*	242/0
FRITZ!Box WLAN 3170	4.31 - 4.58	/dev*	242/0
FRITZ!Box WLAN 3270	4.57 - 4.86	/dev*	242/0
FRITZ!Box WLAN 3270 v3	4.77 - 4.87	/dev*	242/0
FRITZ!Box 4020	7.01	/dev	253/0
FRITZ!Box 4060	7.30 - 7.39	/dev	244/0, 249/0
FRITZ!Box Fon	4.30 - 4.49	/dev*	242/0
FRITZ!Box Fon 5010	4.43	/dev*	242/0
FRITZ!Box Fon 5050	4.30 - 4.31	/dev*	242/0
FRITZ!Box Fon 5113	4.82 - 4.83	/dev*	242/0
FRITZ!Box Fon 5124	4.47 - 4.77	/dev*	242/0
FRITZ!Box Fon 5140	4.37 - 4.67	/dev*	242/0
VoIP Gateway 5188	4.28 - 4.81	/dev*	242/0
FRITZ!Box 6360 Cable	4.85 - 5.25	/dev, /dev*	242/0, 253/0
FRITZ!Box 6850 LTE	7.39	/dev	245/0
FRITZ!Box 6850 5G	7.39	/dev	245/0
FRITZ!Box Fon WLAN	4.33 - 4.49	/dev*	242/0
FRITZ!Box Fon WLAN 7050	4.30 - 4.50	/dev, /dev*	242/0
FRITZ!Box Fon WLAN 7112	4.76 - 4.88	/dev*	242/0
FRITZ!Box Fon WLAN 7113	4.40 - 4.86	/dev*	242/0
FRITZ!Box Fon WLAN 7113 DE	4.40 - 4.77	/dev*	242/0
FRITZ!Box Fon WLAN 7113 INT	4.82 - 4.86	/dev*	242/0
FRITZ!Box Fon WLAN 7140	4.30 - 4.77	/dev, /dev*	242/0
FRITZ!Box Fon WLAN 7141	4.14 - 4.77	/dev*	242/0
FRITZ!Fon 7150	4.30 - 4.77	/dev, /dev*	242/0
FRITZ!Box Fon WLAN 7170	4.22 - 4.99	/dev*	242/0
FRITZ!Box Fon WLAN 7170 v1	4.22 - 4.99	/dev*	242/0
FRITZ!Box Fon WLAN 7170 v2	4.22 - 4.99	/dev*	242/0
FRITZ!Box Fon WLAN 7240	4.65 - 6.06	/dev, /dev*	242/0, 252/0
FRITZ!Box Fon WLAN 7270 v1	4.44 - 4.99	/dev*	242/0
FRITZ!Box Fon WLAN 7270 v2	4.67 - 4.94	/dev*	242/0
FRITZ!Box Fon WLAN 7270 v3	4.76 - 4.99	/dev*	242/0
FRITZ!Box 7272	6.88	/dev	252/0
FRITZ!Box Fon WLAN 7320	6.55	/dev	251/0
FRITZ!Box Fon WLAN 7340	4.83 - 4.90	/dev*	242/0
FRITZ!Box 7362 SL	7.12	/dev	251/0
FRITZ!Box Fon WLAN 7390	4.81 - 6.04	/dev, /dev*	242/0, 254/0
FRITZ!Box 7412	6.87	/dev	251/0
FRITZ!Box 7430	7.29	/dev	251/0
FRITZ!Box 7510	7.30	/dev	243/0
FRITZ!Box 7520	7.29 - 7.50	/dev	245/0, 250/0
FRITZ!Box 7530	7.39	/dev	245/0
FRITZ!Box 7530 AX	7.31 - 7.51	/dev	248/0, 251/0
FRITZ!Box Fon WLAN 7570 vDSL	4.70 - 4.94	/dev*	242/0
FRITZ!Box 7581	7.17	/dev	252/0
FRITZ!Box 7590	7.57 - 7.90	/dev	248/0
FRITZ!Box 7590 AX	7.31 - 7.39	/dev	248/0, 249/0
FRITZ!Smart Gateway	7.57 - 7.58	/dev	241/0
FRITZ!WLAN Repeater N/G	4.65 - 4.88	/dev*	242/0
FRITZ!Repeater 1200 AX	7.30 - 7.39	/dev	241/0, 243/0
FRITZ!WLAN Repeater 1750E	7.29	/dev	253/0
FRITZ!Repeater 6000	7.29 - 7.39	/dev	244/0, 249/0
congstar DSL-Box	4.25 - 4.81	/dev*	242/0
congstar komplett Box	4.68 - 4.81	/dev*	242/0
Speedport W 501V	4.38	/dev*	242/0
Speedport W 503V	4.68 - 4.81	/dev*	242/0
Speedport W 503V MK	4.79	/dev*	242/0
Speedport W 701V	4.25 - 4.81	/dev*	242/0
Speedport W 721V	4.74 - 4.75	/dev*	242/0
Speedport W 722V	4.76 - 4.79	/dev*	242/0
Speedport W 900V	4.21 - 4.57	/dev*	242/0
Speedport W 920V	4.78 - 4.79	/dev*	242/0
Speedport W 101 Bridge	4.68	/dev*	242/0
Eumex 300 IP	4.44	/dev*	242/0
Alice IAD 5130	4.65 - 4.71	/dev*	242/0
Alice IAD WLAN 3331	4.90	/dev*	242/0
Alice IAD 7570 vDSL	4.86 - 5.09	/dev*	242/0
75 models use this device

SMW-Browser

Property:watchdog (device)

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