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nawk and space in the parameter

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# 1  
Old 08-04-2011
nawk and space in the parameter
Hi,

Could you please tell me how nawk command works when there is a asterisk <*> or space with asterisk <[space] *> or <*[space] > in the parameter.

I am just trying to read line by line and fetch fourth parameter separated by delimiter (|).
But if there is a * or <[space] *> or <*[space] > in the fourth parameter it gets all the files in that directory. How to address this issue..

Code:
PARAM4=`echo $LINE | nawk -F"|" '{print $4}'
echo $PARAM4

output for echo comes like that 123 file1.csv file2.txt
Last edited by radoulov; 08-04-2011 at 08:05 AM.. Reason: Code tags!
# 2  
Old 08-04-2011
It's not awk, it's the shell ...
You need to quote the parameters in order to avoid shell filed splitting and filename generation (globbing)!

Code:
PARAM4=`echo "$LINE" | nawk -F"|" '{print $4}'
echo "$PARAM4"

Or better:

Code:
PARAM4=$(
  printf '%s\n' "$LINE" | 
    nawk -F"|" '{ print $4 }'
  )

printf '%s\n' "$PARAM4"

This User Gave Thanks to radoulov For This Post:
nram_krishna@ya
# 3  
Old 08-04-2011
second option works good.. Thank you..
if i want to make some kind of string manipulation on PARAM4, how should i do.. like using sed or etc., when i use PARAM4 with sed, i getting stuck with same problem again.
# 4  
Old 08-04-2011
We'll need to see a sample of your input and an example of the desired/expected output.
This User Gave Thanks to radoulov For This Post:
nram_krishna@ya
# 5  
Old 08-04-2011
Thanks,

Here is the script <test.ksh> i use

Code:
#!/bin/ksh
LINE="nramak|BFS|121 * 789 * 85#2[123]|7539|"
PARAM4=$(printf '%s\n' "$LINE" | nawk -F"|" '{ print $3 }')
printf '%s\n' "$PARAM4"

PARAM5=`echo "$PARAM4" |  sed 's/\[/ /g'  | sed 's/\]/ /g' | sed 's/#/ /g'`

echo $PARAM5


when i ran it, i got below:
Code:
121 * 789 * 85#2[123]
121 test.ksh 789 test.ksh 85 2 123

seems like i have trouble in line#5 while using sed command on PARAM4.

Any idea how to get this done.
Thanks in advance!
Last edited by radoulov; 08-04-2011 at 11:11 AM.. Reason: Code tags.
# 6  
Old 08-04-2011
Try this:

Code:
line='nramak|BFS|121 * 789 * 85#2[123]|7539|'

param4=$(
  printf '%s\n' "$line" |
    cut -d\| -f3 |
          tr ']#[' '   '
  )

printf '%s\n' "$param4"

This User Gave Thanks to radoulov For This Post:
nram_krishna@ya
# 7  
Old 08-04-2011
It works. Thank you very much
Which command gives better performance sed or tr
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