Property:log server (avmcmd)

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BoxMatrix >> Shell-Commands >> log_server (avmcmd)

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Name-Collision - multiple objects in this wiki use the name log_server! log_server (avmcmd) Inter-CPU logging receiver daemon for x490 models. log_server (process) Process running log_server log_server (watchdog) Watchdog for log_server

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AVM-Command

Command:	log_server (avmcmd)   -   type Exec	Wiki	Freetz	IPPF	whmf	AVM	Web
Location:	Shell-Commands >> AVM-Commands   -   Origin: AVM
Path:	Release: /usr/bin Lab+Rel: /usr/bin
Properties:	Size: 36.5k - 44.5k   -   Firmware: 6.98 - 7.51
Function:	Inter-CPU logging receiver daemon for x490 models.

Goto:   Source  -  Dependencies   -   Model-Matrix   -   Symbols   -   SMW-Browser

Details

log_server and log_sink are a remote logger solution to forward the Scorpion Linux logs to the VR9 Linux
on 3490, 5490, 5491 and 7490 models.

log_server listens to a range of internal IPv6 UDP ports on the wasp interfacee of the VR9 Linux which connects the Scorpion.
It writes all received data to a range of logs on the VR9 Linux, excerpt from a 7490 fw 7.29 ps on VR9:

5018 root      2464 S<   log_server -d -t 0 -i wasp -w 20 4201 /var/log/panic2
5021 root      2464 S<   log_server -d -t 0 -i wasp -w 20 4202 /var/log/debug2
5025 root      2464 S<   log_server -d -t 0 -i wasp -w 20 4210 /var/log/wland_hal_remoted.log
5029 root      1572 S<   log_server -d -t 0 -i wasp -w 20 4211 /var/log/hostapd.log
5031 root      2464 S<   log_server -d -t 0 -i wasp -w 20 4212 /var/log/wpa_supplicant.log
5033 root      1572 S<   log_server -d -t 0 -i wasp -w 20 4213 /var/log/acfg.trace
5035 root      2464 S<   log_server -d -t 0 -i wasp -w 20 4214 /var/log/crash2

The counterpart daemon runninng on the Scoripion Linux is log_sink which forwards the data to log_server.
There's also one instance of log_server running on Scoripion Linux which awaits remote commands from the VR9.
Excerpt from a 7490 fw 7.29 ps on Scorpion:

 110     1 root     S     1440  1.2   0  0.0 log_server -d -b 1 -t 0 -c -i eth0 -w 10 4220 /tmp/rcmd_vr9

See the log_sink article how this is used during supportdata creation on both sides.
rcmd_vr9 is a normal file which, if present, is interpreted by watch_supportdata_trigger and deleted after dispatching it.
It is recreated by log_server once a new command arrives.

fw 7.29 help:

fritz3:/var/media/ftp $ log_server -?

Usage: log_server [OPTION...] Port output_file

log_server listens to a UDP port and writes data to a given file (IPv6only).
The log data will be held in a ring buffer, if 'readback' is enabled the
internal ring buffer is filled with the content of the provided file.
When no data is received for [timeout] seconds, the content of the ring buffer
will be written into the provided file.

  -b, --buffer=KB            log write buffer (128)
  -c, --clean                clean buffer after write
  -d, --daemon               start daemonized
  -i, --interface=intf       interface name
  -l, --listen-ip=IPv6       listen ip address
  -r, --readback             fill log buffer with the content of output_file
  -t, --write-timeout=sec    log write timeout (5)
  -v, --verbose              verbose
  -w, --watchdog-timeout=sec watchdog timeout (0)
  -?, --help                 Give this help list
      --usage                Give a short usage message
  -V, --version              Print program version 

Mandatory or optional arguments to long options are also mandatory or optional
for any corresponding short options. 

Report bugs to j.balke@avm.de.

Source

The names of source files compiled into an executable often help to understand function blocks (and show gaps in the docs).
fw 7.29 source files:

$ strings /usr/bin/log_server | grep -e '\.c$' -e '\.cpp$'

argp-parse.c
argp-help.c  

Dependencies

Daily updated index of all dependencies of this command. Last update: 2025-05-26 06:16 GMT.
A * in the Mod column marks info from Supportdata-Probes, which will always stay incomplete.

Relation	Typ	Object	Mod	Firmware	Info	Origin
Runs as	proc	log_server (process)	8*	7.01 - 7.59	Process running log_server	AVM
Registers	wdog	log_server (watchdog)	8*	7.01 - 7.59	Watchdog for log_server	AVM
Serving	port	Port-4201-udp	4*	7.01 - 7.59	log_server Inter-CPU logging to panic2 on VR9 of x490 models.	AVM
Serving	port	Port-4202-udp	4*	7.01 - 7.59	log_server Inter-CPU logging to debug2 on VR9 of x490 models.	AVM
Serving	port	Port-4210-udp	4*	7.01 - 7.59	log_server Inter-CPU logging to wland_hal_remoted.log on VR9 of x490 models.	AVM
Serving	port	Port-4211-udp	4*	7.01 - 7.59	log_server Inter-CPU logging to hostapd.log on VR9 of x490 models.	AVM
Serving	port	Port-4212-udp	4*	7.01 - 7.59	log_server Inter-CPU logging to wpa_supplicant.log on VR9 of x490 models.	AVM
Serving	port	Port-4213-udp	4*	7.01 - 7.59	log_server Inter-CPU logging to acfg.trace on VR9 of x490 models.	AVM
Serving	port	Port-4214-udp	4*	7.01 - 7.59	log_server Inter-CPU logging to crash2 on VR9 of x490 models.	AVM
Serving	port	Port-4220-udp	4*	7.01 - 7.59	log_server Inter-CPU logging to rcmd_vr9 on Scorpion of x490 models.	AVM
Serving	port	Port-4221-udp	1*	7.08 - 7.19	log_server Inter-CPU logging to supportdata_wlan_offload on VR9 of x490 models.	AVM
Serving	sock	avmnexus_WLANConfigMaster.ctl	41*	6.90 - 8.00	avmnexusd worker endpoint for WLAN config sharing (master)	AVM
Serving	sock	avmnexus_WLANStationExchangeMaster.ctl	41*	6.90 - 8.00	avmnexusd worker endpoint for WLAN steering (master)	AVM
Serving	sock	wlancsi_async.socket	74*	6.25 - 8.00	TODO	AVM
Depends on	lib	ld.so	8	7.01 - 7.51	Dynamic linker / loader	Linux
Depends on	lib	libbacktrace.so	8	6.98 - 7.51	Crash handler and logger	AVM
Depends on	lib	libc.so	8	6.98 - 7.51	Standard C library	Linux
Depends on	lib	libwdt.so	8	6.98 - 7.51	AVM-Watchdogs management API	AVM
18 dependencies for this command

Model-Matrix

Daily updated index of the presence, path and size of this command for each model. Last update: 2025-05-26 04:32 GMT.
Showing all models using this command. Click any column header (click-wait-click) to sort the list by the respective data.
The (main/scrpn/boot/arm/prx/atom/rtl) label in the Model column shows which CPU is meant for Multi-Linux models.
Note that this list is merged from Firmware-Probes of all known AVM firmware for a model, including Recovery.exe and Labor-Files.

Model	Firmware	Path	Size
FRITZ!Box 3490 (main)	7.01 - 7.30	/usr/bin	38.2k - 40.5k
FRITZ!Box 3490 (scrpn)	6.98 - 7.29	/usr/bin	41.2k - 44.5k
FRITZ!Box 5490 (main)	7.01 - 7.29	/usr/bin	38.2k - 40.5k
FRITZ!Box 5490 (scrpn)	6.98 - 7.29	/usr/bin	41.2k - 44.5k
FRITZ!Box 5491 (main)	7.01 - 7.29	/usr/bin	38.2k - 40.5k
FRITZ!Box 5491 (scrpn)	6.98 - 7.29	/usr/bin	41.2k - 44.5k
FRITZ!Box 7490 (main)	6.98 - 7.51	/usr/bin	36.5k - 40.5k
FRITZ!Box 7490 (scrpn)	6.98 - 7.51	/usr/bin	36.5k - 44.5k
8 models use this command

Symbols

Daily updated index of all symbols of this command. Last update: 2025-05-26 06:16 GMT.

Firmware	Symbol
6.98 - 7.51	argp_error
6.98 - 7.51	argp_failure
6.98 - 7.51	argp_fmtstream_free
6.98 - 7.51	argp_fmtstream_printf
6.98 - 7.51	argp_help
6.98 - 7.51	argp_make_fmtstream
6.98 - 7.51	argp_parse
6.98 - 7.51	argp_state_help
6.98 - 7.51	argp_usage
6.98 - 7.51	close_log
6.98 - 7.51	logd_get_running
6.98 - 7.51	logd_install_crashhandler
6.98 - 7.51	logd_install_sighandler
6.98 - 7.51	logd_install_watchdog
6.98 - 7.51	main
6.98 - 7.51	open_log
16 symbols for this command

SMW-Browser

Property:log server (avmcmd)

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