How can I direct messages from mac console.app to a log file? Post: 303038443

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Operating Systems OS X (Apple) How can I direct messages from mac console.app to a log file? Post 303038443 by dallas88 on Tuesday 3rd of September 2019 09:22:48 AM

09-03-2019

Registered User

How can I direct messages from mac console.app to a log file?

I'm trying to complete a bash script to capture if an external webcam is active in a video conference session. Some users will switch the camera to the built-in MAC camera. When this happens I want to trigger a set of events.

Things tried: reviewed the console.app to look for patterns on when the switch occurs in a user test & discovered messages indicating when the facetime camera changes state. I found this

Code:

019-08-31 22:59:57.387405 -0500 AppleCameraInterface default 0 22:59:57.387405 -0500 kernel AppleCamIn::power_on_hardware

2019-08-31 22:59:57.814936 -0500 AppleCameraAssistant default 438 22:59:57.814936 -0500 AppleCameraAssistant StartHardwareStream: creating frame receiver: 1280 x 720 (420v) [12.00,30.00]fps

2019-08-31 22:59:59.679037 -0500 AppleCameraAssistant default 438 22:59:59.679037 -0500 AppleCameraAssistant StopHardwareStream 2019-08-31 22:59:59.809252 -0500 AppleCameraInterface default 0 22:59:59.809252 -0500 kernel AppleCamIn::power_off_hardware

I thought I could simply grep these message from the console.app but it seems to be easier said than done. I thought i could find the msgs in one of the console report files but When I look at the various reports on the console, i'm not finding a report that contains the messages above. How can I direct messages from console.app to a log file versus manually copying and pasting the info from the console?or point me to a direction? Am I missing something?

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LEARN ABOUT DEBIAN

fs_messages

FS_MESSAGES(1)						       AFS Command Reference						    FS_MESSAGES(1)

NAME

       fs_messages - Sets whether the Cache Manager writes log messages

SYNOPSIS

       fs messages [-show (user|console|all|none)] [-help]

       fs me [-s (user|console|all|none)] [-h]

DESCRIPTION

       The fs messages command controls whether the Cache Manager displays status and warning messages on user screens, the client machine
       console, on both, or on neither.

       There are two types of Cache Manager messages:

       o   User messages provide user-level status and warning information, and the Cache Manager directs them to user screens.

       o   Console messages provide system-level status and warning information, and the Cache Manager directs them to the client machine's
	   designated console.

       Disabling messaging completely is not recommended, because the messages provide useful status and warning information.

OPTIONS

       -show (user|console|all|none)
	   Specifies the types of messages to display. Choose one of the following values:

	   user
	       Send user messages to user screens.

	   console
	       Send console messages to the console.

	   all Send user messages to user screens and console messages to the console (the default if the -show argument is omitted).

	   none
	       Do not send any messages to user screens or the console.

       -help
	   Prints the online help for this command. All other valid options are ignored.

EXAMPLES

       The following command instructs the Cache Manager to display both types of messages:

	  % fs messages -show all

PRIVILEGE REQUIRED

       The issuer must be logged in as the local superuser root.

SEE ALSO

       afsd(8)

COPYRIGHT

       IBM Corporation 2000. <http://www.ibm.com/> All Rights Reserved.

       This documentation is covered by the IBM Public License Version 1.0.  It was converted from HTML to POD by software written by Chas
       Williams and Russ Allbery, based on work by Alf Wachsmann and Elizabeth Cassell.

OpenAFS 							    2012-03-26							    FS_MESSAGES(1)