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unable to read a parameter

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Top Forums Shell Programming and Scripting unable to read a parameter
# 8  
Old 05-02-2012
PHP
Shailesh,
My requirement is to read a log file (pe.txt) of 35kB and send an alert if any string "Component Manager stopped" is received. also not to report the same alert again.
So ,I am parsing file from bottom to top to get latest alert.

with the code I posted I get following output which is not correct
[output]
151617
tivoli already generated
151617
tivoli already generated
[\output]

Please Help .
# 9  
Old 05-02-2012
To get the last one,

you can use the below awk

Code:
 
awk '/Component Manager stopped/ {gsub(":","",$2);last=$2}END{print last}' pe.txt

it will print the last time
This User Gave Thanks to itkamaraj For This Post:
dhirajdsharma
# 10  
Old 05-02-2012
Question
Hi ,

I get the intended result , however I also get this output -
[output]
./tivoliscript.ksh[22]: ^[^[[A^[[A^[d: not found.
[/output]

Please help.Smilie
# 11  
Old 05-04-2012
MySQL Working Now.
Issue resolved.

I was using
Code:
sed 's/://g' newfile.txt | read temp

at the start of my script which was giving output

Code:
./tivoliscript.ksh[22]: ^[^[[A^[[A^[d:  not found.

I removed the above code since I was actually not generating newfile.txt to have any colon based data...all data it has is place 6 digits.. :-) ..

Thanks Everyone. !!
Last edited by Corona688; 05-04-2012 at 01:43 PM..
# 12  
Old 07-08-2012
Question How to tackle an empty string caught in read command
Hi All,

In code below,if pe.txt does not have a string "Component Manager stopped" then when my awk does not find the intended string in the txt file then 'read' command passes an empty value to "msgtime" parameter , I tried to put an if statement to check for an empty string still error comes shown below code..

Please suggest how should I tackle it here ..

Code:
cat newfile.txt | read temp

awk '/Component Manager stopped/ {gsub(":","",$2);last=$2}END{print last}' pe.txt | while read msgtime
                                                                                        do
                                                                                                if [$msgtime -ne null]; then
                                                                                                test $temp -eq $msgtime
                                                                                                if [ $? -eq 0 ]; then
                                                                                                        echo $msgtime
                                                                                                        echo "tivoli already generated"
                                                                                                else
                                                                                                        echo "$msgtime" > newfile.txt
                                                                                                        touch ComponentManagerDown_on_`hostname`.txt
                                                                                                fi
                                                                                                else
                                                                                                        echo "timestamp is null" > /dev/null 2>&1
                                                                                                fi
                                                                                        done

running the above gives me error -
[error]
[aeadmin@FNPRODXT1:/AELogs]$ ksh tivoliscript.ksh
tivoliscript.ksh[11]: test: 0403-021 A ] character is missing.
[/error]

Eagerly awaiting your valuable replies.
# 13  
Old 07-08-2012
Code:
cat newfile.txt | read temp

awk '/Component Manager stopped/ {gsub(":","",$2);last=$2}END{print last}' pe.txt | while read msgtime
                                                                                        do
                                                                                                if [ ! -z "$msgtime" ]; then
                                                                                                test $temp -eq $msgtime
                                                                                                if [ $? -eq 0 ]; then
                                                                                                        echo $msgtime
                                                                                                        echo "tivoli already generated"
                                                                                                else
                                                                                                        echo "$msgtime" > newfile.txt
                                                                                                        touch ComponentManagerDown_on_`hostname`.txt
                                                                                                fi
                                                                                                else
                                                                                                        echo "timestamp is null" > /dev/null 2>&1
                                                                                                fi
                                                                                        done

# 14  
Old 07-08-2012
$temp won't be set for comparison. you'd need to set it without using a pipe.

Code:
temp=$(cat newfile.txt)
or
read temp < newfile.txt
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