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How to put a word starting at particular position in a file using shell scripting

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Top Forums Shell Programming and Scripting How to put a word starting at particular position in a file using shell scripting
# 22  
Old 12-01-2009
Code:
cat -vte temp.txt
1^I^I123^I12 34^I1$
A^IAB^IABC^IABDC^Ie$

# 23  
Old 12-01-2009
So why are you expecting a different output?
In the config file you posted the third filed should start at position 5 ...
Last edited by radoulov; 12-01-2009 at 12:14 PM..
# 24  
Old 12-01-2009
My mistake radalouv. I apolgise. I had changed the config files in IBM and HP and hence was getting diff outputs. Your code is PERFECT.
I have tested the code in both IBM and HP and it works fine.
Hopefully it'll work in SUN as well.

Thanks a tonne for your help.
You are a life saver.
# 25  
Old 12-01-2009
Quote:
Originally Posted by subhrap.das
[...]
Hopefully it'll work in SUN as well.
[...]
On Solaris you should use nawk or /usr/xpg4/bin/awk.
# 26  
Old 03-02-2010
Some addition
Hi Radoulov,
Just need to add 1 more condition in the script to check if the 2nd tab separated value = U then i ignore the complete line and move to the next line in temp.txt.
How can this be done?
i have added some pathetic logic by reading line by line of the file generated by the above script and storing it in a temp file. and then using cut -d. Its taking ages.
Please help
# 27  
Old 03-03-2010
Try this:

Code:
awk -F'\t' 'NR == FNR {
  /^[ \t]*\47name/ && c++      # get the field number
  if (/^[ \t]*\47size/) {
    split($0, t, ":")          
    gsub(/[ \t\47,]/, x, t[2]) # strip punctuation
    fmt[c] = t[2]              # get the size 
    }
  next                         # run the above actions                                     
  }                            # + only for the first input file
$2 != "U" { 
  for (i=1; i<=NF; i++)        # output the strings in the correct format
    printf "%" (length($i) > fmt[i] + 0 ? "." : "-" ) fmt[i] "s", $i           
  print x
  }' config.txt temp.txt
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