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expr: syntax error

 
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# 1  
Old 04-16-2010
expr: syntax error
Hi All,

This is a piece of code from one of my scripts:


Code:
t1=`cat temp3.21447 | grep WEALTHTOUC_TRANS_20100409_233127.txt.txt.TRG | awk '{print $3}' | cut -c1-5`
t2=`cat temp3.21447 | grep WEALTHTOUC_TRANS_20100409_233127.txt.txt.TRG | awk '{print $5}' | cut -c1-5`
 
#t1=23:43
#t2=23:40
        shr=`echo $t1 | cut -c1-2`
        smin=`echo $t1 | cut -c4-5`
        stot=`expr $shr \* 60`
        stot=`expr $stot + $smin`
        ehr=`echo $t2 | cut -c1-2`
        emin=`echo $t2 | cut -c4-5`
        etot=`expr $ehr \* 60`
        etot=`expr $etot + $emin`
        if [ $stot -gt $etot ]
        then
        etot=`expr $etot + 1440`
        fi
        diff=`expr $etot - $stot`

its giving me 3 times syntax error, though its giving the desired result. but this error is very annoying.
Code:
expr: syntax error
expr: syntax error
expr: syntax error

I'm using #!/bin/ksh
at the top of my script. Pls help.Thanks
Last edited by pludi; 04-16-2010 at 03:09 AM.. Reason: code tags, please...
# 2  
Old 04-16-2010
i hope you have some undefined variables used in expr, thats why you get this syntax error.
# 3  
Old 04-16-2010
Hi.

I would surround the identified area of the script with:
Code:
set -x
...
set +x

as a kind of trace that will show you commands as they are executed. That should get you farther ... cheers, drl
# 4  
Old 04-16-2010
You can replace this snippet of your code with all the cat, awk, cut, grep and expr commands:
Code:
t1=`cat temp3.21447 | grep WEALTHTOUC_TRANS_20100409_233127.txt.txt.TRG | awk '{print $3}' | cut -c1-5`
t2=`cat temp3.21447 | grep WEALTHTOUC_TRANS_20100409_233127.txt.txt.TRG | awk '{print $5}' | cut -c1-5`
 
#t1=23:43
#t2=23:40
        shr=`echo $t1 | cut -c1-2`
        smin=`echo $t1 | cut -c4-5`
        stot=`expr $shr \* 60`
        stot=`expr $stot + $smin`
        ehr=`echo $t2 | cut -c1-2`
        emin=`echo $t2 | cut -c4-5`
        etot=`expr $ehr \* 60`
        etot=`expr $etot + $emin`
        if [ $stot -gt $etot ]
        then
        etot=`expr $etot + 1440`
        fi
        diff=`expr $etot - $stot`

with one awk command:
Code:
diff=`awk '/WEALTHTOUC_TRANS_20100409_233127.txt.txt.TRG/{
  t1=sub($3,1,5)
  t2=sub($5,1,5)
  split(t1,s,":")
  split(t2,e,":")
  stot=s[1] * 60 + s[2]
  etot=e[1] * 60 + e[2]
  if(stot > etot){ etot+=1440 }
  print etot - stot
}
' temp3.21447`

echo $diff

Regards
# 5  
Old 04-16-2010
It would be interesting to see the output from this command:

Code:
cat temp3.21447 | grep WEALTHTOUC_TRANS_20100409_233127.txt.txt.TRG

# 6  
Old 04-16-2010
expr issue
Code:
t1=`cat temp3.21447 | grep WEALTHTOUC_TRANS_20100409_233127.txt.txt.TRG | awk '{print $3}' | cut -c1-5`

try like this

Code:
t1=`cat temp3.21447 | grep 'WEALTHTOUC_TRANS_20100409_233127.txt.txt.TRG' | awk '{print $3}' | cut -c1-5`

Last edited by Franklin52; 04-18-2010 at 08:43 AM.. Reason: Please use code tags, thank you
 
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