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Full Discussion: ksh PS4 variable assign to `date` output
Top Forums Shell Programming and Scripting ksh PS4 variable assign to `date` output Post 302868939 by aoussenko on Tuesday 29th of October 2013 10:09:44 AM
Old 10-29-2013
ksh PS4 variable assign to `date` output
Hi guys,
Is there a way to assign curent time to PS4 variable in ksh. My goal is to have each line produced by 'set -x' command to have a time stamp.
Here is my code:

Code:
$cat test
#!/usr/bin/ksh
export PS4="`date` [${LINENO}]"
set -x
echo "TRACE LINE ONE"
echo "I WILL SLEEP FOR 10 SEC"
sleep 10
echo "TRACE LINE TWO"
exit 0
$

and this is an output:

Code:
$./test
Tue Oct 29 10:05:53 EDT 2013 [2]echo TRACE LINE ONE
TRACE LINE ONE
Tue Oct 29 10:05:53 EDT 2013 [2]echo I WILL SLEEP FOR 10 SEC
I WILL SLEEP FOR 10 SEC
Tue Oct 29 10:05:53 EDT 2013 [2]sleep 10
Tue Oct 29 10:05:53 EDT 2013 [2]echo TRACE LINE TWO
TRACE LINE TWO
Tue Oct 29 10:05:53 EDT 2013 [2]exit 0
$

Note: the time stamp remains the same although 'sleep 10' should have change it.
May be someone know how to make the time to change dynamically
I am in ksh88.
Thanks a lot for any advice.....
 

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LEARN ABOUT SUSE

sleep

SLEEP(1)							   User Commands							  SLEEP(1)

NAME

       sleep - delay for a specified amount of time

SYNOPSIS

       sleep NUMBER[SUFFIX]...
       sleep OPTION

DESCRIPTION

       Pause for NUMBER seconds.  SUFFIX may be `s' for seconds (the default), `m' for minutes, `h' for hours or `d' for days.	Unlike most imple-
       mentations that require NUMBER be an integer, here NUMBER may be an arbitrary floating point number.  Given two or  more  arguments,  pause
       for the amount of time specified by the sum of their values.

       --help display this help and exit

       --version
	      output version information and exit

AUTHOR

       Written by Jim Meyering and Paul Eggert.

REPORTING BUGS

       Report sleep bugs to bug-coreutils@gnu.org
       GNU coreutils home page: <http://www.gnu.org/software/coreutils/>
       General help using GNU software: <http://www.gnu.org/gethelp/>

COPYRIGHT

       Copyright (C) 2009 Free Software Foundation, Inc.  License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>.
       This is free software: you are free to change and redistribute it.  There is NO WARRANTY, to the extent permitted by law.

SEE ALSO

       sleep(3)

       The  full  documentation  for sleep is maintained as a Texinfo manual.  If the info and sleep programs are properly installed at your site,
       the command

	      info coreutils 'sleep invocation'

       should give you access to the complete manual.

GNU coreutils 7.1						     July 2010								  SLEEP(1)
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