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Full Discussion: Log file in shell script
Top Forums Shell Programming and Scripting Log file in shell script Post 302961808 by Don Cragun on Friday 4th of December 2015 04:37:51 AM
Old 12-04-2015
Quote:
Originally Posted by arun888
thanks for your help don. i would need to assign the exit status[0,1] to a variable $var and redirect it to the log file.
You can't write to a log file after you exit.

Why do you care if the exit status is stored in a variable before you write it?

What is the name of the log file?

Do you want to append data to the end of the log file, or do you want to replace the entire contents of your log file each time you run your script?

Do you really just want to write a 0 or 1 to your log file? Or, do you want the name of the program producing that line to be included in the log file?

If you just want a 0 or 1 in a file, why not just capture the exit status of your program after it completes instead of creating a file?

Do you want a timestamp showing when that entry was written to your log file? If you do, what format do you want to use? And, do you want to use local time or coordinated universal time (AKA GMT)?
This User Gave Thanks to Don Cragun For This Post:
arun888
 

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LEARN ABOUT OPENSOLARIS

ds.log

ds.log(4)							   File Formats 							 ds.log(4)

NAME

       ds.log - Availability Suite data services log file

DESCRIPTION

       The  /var/adm/ds.log file contains the Availability Suite data services command log. The administration commands log activities to the file
       in the format:

	 date time product: message

       Note that when the size of the log file exceeds 10 Mbytes, ds.log is renamed  /var/adm/ds.log.bak  and a new /var/adm/ds.log file  is  cre-
       ated.

       The ds.log fields are:

       date

	   The	date format is mmm nn, where mmm  is  the local three-character abbreviation for the month and nn is the day of the month on which
	   the event occurred.

       time

	   The time of the event, in hh:mm:ss format.

       product

	   A product code that identifies which component of the data services produced the event. The code is separated  from	the  message  that
	   follows by a colon (:) and a space.

       message

	   A  message  that  can extend over  more  than  one  line describing the event that occurred. The second or following lines are not pre-
	   fixed by  the  date, time, and product code strings.

EXAMPLES

       The example below shows sample ds.log file content:

	 Jan 25 05:26:17 ii: iiboot suspend cluster tag <none>
	 Jan 25 05:32:02 ii: iiboot resume cluster tag <none>
	 Jan 25 05:32:04 sv: svboot: resume /dev/vx/rdsk/bigmaster
	 Jan 25 05:32:04 sv: svboot: resume /dev/vx/rdsk/bigshadow
	 Jan 25 05:32:04 sv: svboot: resume /dev/vx/rdsk/mstvxfs
	 Jan 25 05:32:04 sv: svboot: resume /dev/vx/rdsk/master01

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +---------------------+---------------------------------------------------------+
       |   ATTRIBUTE TYPE    |			   ATTRIBUTE VALUE		       |
       +---------------------+---------------------------------------------------------+
       |Architecture	     | x86						       |
       +---------------------+---------------------------------------------------------+
       |Availability	     | SUNWscmu 					       |
       +---------------------+---------------------------------------------------------+
       |Interface Stability  | Committed					       |
       +---------------------+---------------------------------------------------------+

SEE ALSO

       iiadm(1M), sndradm(1M), svadm(1M), attributes(5)

SunOS 5.11							    08 Jun 2007 							 ds.log(4)
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