topic Re: Compare two variables in Operating System - HP-UX

Compare two variables

Graham Van der vaart_1 — Tue, 08 Sep 2009 05:46:28 GMT

Hi
I have a shell script:

#!/usr/bin/sh

NOW=`date +%b' '%e' '`
HR=22
SP=$NOW$HR

CHECK=`ll -tr /tmp/myfile*| awk ' { print $6,$7,substr
($8,1,2)}'|tail -n 1`

if [ "$SP" = "$CHECK" ]
then
{
echo "File did arrive at 22h00 today"
exit 0
}
else
{
echo "File did not arrive at 22h00 today"
exit 0
}
fi

I want to schedule this script to run at 22h05 to check if a new version of a file (myfile*) has arrived at 22h00.
No matter how I script the expression in the if statement it doesn't behave as expected.
What am I doing wrong?

Regards
Graham

Re: Compare two variables

Matti_Kurkela — Tue, 08 Sep 2009 06:12:41 GMT

Your awk expression produces an output like "Sep 8 10", with a single space between each element.

However, the date command produces two spaces between "Sep" and "8". The "%e" format code for the "date" command always output exactly two characters.

MK

Re: Compare two variables

Hakki Aydin Ucar — Tue, 08 Sep 2009 06:44:30 GMT

>NOW=`date +%b' '%e' '`
Try this:
NOW=`date +%b%e`

Re: Compare two variables

Graham Van der vaart_1 — Tue, 08 Sep 2009 09:00:09 GMT

Thanks,

This works (and tested with |xd):

NOW=`date +%b%e`
HR=22
SP=$NOW" "$HR
echo $SP

CHECK=`ll -tr /tmp/myfile*| awk ' { print $6,$7,substr($8,1,2)}'|tail -n
1`
echo $CHECK

if [ "$SP" = "$CHECK" ]

Thanks again.