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Korn shell script required

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Top Forums Shell Programming and Scripting Korn shell script required
# 1  
Old 02-25-2013
Code Korn shell script required
Want a Korn shell script which reads the records in a file and at a specific position it is to be checked whether tht is blank.
eg-

Code:
dhgadjhkwdkwyuywu< blank spaces for 8 chrs >gdwyduyweeduy
xvgjdwtdjtwktdtwtdt< blank spaces for 8 chrs >udedeiueduuedu

suppose tht one line in file is of 100 characters nd position 20-28 have to be checked for blank or empty string.

Please help...
using awk will be preferred
Last edited by Scrutinizer; 02-25-2013 at 08:49 AM.. Reason: code tags
# 2  
Old 02-25-2013
Hi, what have you tried so far? Are you looking for an awk or a Kornshell solution...
# 3  
Old 02-25-2013
kornshell using awk will be fine
i have tried

---------- Post updated at 07:55 AM ---------- Previous update was at 07:54 AM ----------

Code:
#!/bin/sh
i=1
cat file1 | while read line
do
str1=`echo $line | cut -c5-10 `
if [ -z "$str1" ]
then
echo "Line No. $i -- No String in position 5-10 "
else
echo "Line No. $i -- String in position 5-10 : $str1"
fi
i=`expr $i + 1`
done

~
~

---------- Post updated at 07:56 AM ---------- Previous update was at 07:55 AM ----------

but this does not work correctly if the file is like the format I have mentioned above
Last edited by Scrutinizer; 02-25-2013 at 09:00 AM.. Reason: code tags
# 4  
Old 02-25-2013
Using awk program with substr function:
Code:
awk '
substr($0, 5, 5) ~ /^[ \t]+$/ {
        print "Line No. " NR "-- No String in position 5-10 "
}

substr($0, 5, 5) !~ /^[ \t]+$/ {
        print "Line No. " NR " -- String in position 5-10 : " substr($0, 5, 5)
} ' file

# 5  
Old 02-25-2013
Wat if the file is '|' (pipe) delimited and 5th field is to be checked for empty string and if it is found to be empty the whole data is to be pushed to another file?
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