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How printf handles empty variables

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# 1  
Old 04-24-2008
How printf handles empty variables
See attached file that includes code, input and output.

I am processing a colon delimited input file and building a ":" (colon) delimited output file.
My printf statement prints contents of each of 20 variables and puts them into a record file. I am pushing out approximately 120 records.
The problem is that if any of those happens to be empty, the ":" is not printed either, so that record is off by one field.
For example my input file has a populated $Comment (6th field) in each of the first two records , but it is empty in the second two records. This throws off my output file by one field.

How do I force it to print ":" so my records will print correctly?

I can get around it by using a test to see if it is empty and populating it but that seems cludgy to me.

Thanks,
SyyyBuggSmilie
code_input_output.txt (1.2 KB) 
# 2  
Old 04-24-2008
Put the variables between double quotes :
Code:
printf '\n:%2s:%10s:%15s:%15s:%10s:%15s:%1s:%2s:%2s:%10s:%2d:%2d:%1d:%1d:%1d:%1d:%1d:%1d:%1d:%3d' \
          "$Stat" "$Update" "$ip" . . .

Jean-Pierre.
# 3  
Old 04-24-2008
Jean-Perre,
That worked! Thanks,
SkyyBuggSmilie
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