idevicesyslog - Man Page

• Relay syslog messages from the connected device: idevicesyslog
• Suppress kernel messages and print everything else: idevicesyslog --no-kernel

tldr.sh

idevicesyslog [Options]

Relay syslog of a connected device.

-u,  --udid UDID

target specific device by UDID

-n,  --network

connect to network device

-x,  --exit

exit when device disconnects

-d,  --debug

enable communication debugging

-h,  --help

prints usage information

-v,  --version

Prints version information.

--no-colors

disable colored output

-o,  --output FILE

Write to FILE instead of stdout. This will disable writing colored output, but can be re-enabled with --colors. If FILE already exists, it will be overwritten without warning.

--colors

Force writing colored output, e.g. when using --output.

-m,  --match STRING

only print messages that contain STRING

This option will set a filter to only printed log messages that contain the given string.

-t,  --trigger STRING

start logging when matching STRING

When specified, logging will start as soon as a log messages is encountered that contains the given string. See also -T, --untrigger. Other filters are still applied but obviously filtered messages are only printed after logging has started.

-T,  --untrigger STRING

stop logging when matching STRING

When specified logging will halt as soon as a log message is encountered that contains the given string. See also -t, --trigger. Other filters are still applied but obviously filtered messages are only printed before logging stops.

NOTE: If no --trigger is given, idevicesyslog will exit after a matching log message was encountered.

-p,  --process PROCESS

only print messages from matching process(es)

PROCESS is a string that can either be a numeric pid or a process name. It also supports multiple process names or pids in one string, separated by | (make sure to use quotes!).

-e,  --exclude PROCESS

print all messages except matching process(es)

PROCESS is a string that can either be a numeric pid or a process name. It also supports multiple process names or pids in one string, separated by | (make sure to use quotes!).

-q,  --quiet

set a filter to exclude common noisy processes

Since the syslog can be quite noisy, this quick command line switch allows silencing a predefined set of commonly known processes. The list of processes that are silenced can be retrieved with --quiet-list.

--quiet-list

prints the list of processes for --quiet and exits

-k,  --kernel

only print kernel messages

This is actually equivalent to passing --process kernel with the exception that it can be used with --quiet to silence out the noisy process but still get all the kernel log messages.

-K,  --no-kernel

suppress kernel messages

This is equivalent to passing --exclude kernel.

idevicesyslog -u 00008030-0000111ABC000DEF

Relay syslog of device with UDID 00008030-0000111ABC000DEF.

idevicesyslog -x

Relay syslog of device and exit when the device is unplugged.

idevicesyslog -m '####' -e 'identityservicesd' -K

Only print log messages that contain the string #### and do NOT originate from identityservicesd or the kernel.

idevicesyslog -p MyApp -p ReportCrash

Only print log messages from the process named 'MyApp' and 'ReportCrash'.

idevicesyslog -p 'MyApp|ReportCrash'

Same as previous example with different syntax.

idevicesyslog -e 'backboardd|CommCenter|mDNSResponder'

Suppress log messages from backboardd, CommCenter, and mDNSResponder.

idevicesyslog -q -k

Suppress log messages from common noisy processes, but DO print kernel log messages.

idevicesyslog -K

Suppress log messages from kernel, but print everything else

idevicesyslog -t 'backlight on' -T 'backlight off' -q

Start logging when the device turns on backlight and stop logging when it turns backlight off, and suppress noisy processes

Nikias Bassen, Martin Szulecki

Man page written to conform with Debian by Julien Lavergne.

https://libimobiledevice.org

https://github.com/libimobiledevice/libimobiledevice