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Shell Programming and Scripting

Disable wildcard

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# 1  
Old 01-24-2007
Disable wildcard
Hi,


Please advise how can I modify my command to extract all strings with exact match only (no wildcard character).

Command:
cat /home/source_file.dat | awk -f /home/filter.awk criteria1=abc > /home/destn_file.dat


Thanks,
Rock
# 2  
Old 01-24-2007
It would help if you posted the code that is actually doing the work ie. filter.awk.
# 3  
Old 01-24-2007
I can extract all strings start with abc (like abc*) with the symbol '^'. Is there any similiar method to handle the wildcard situation?

e.g.
cat /home/source_file.dat | awk -f /home/filter.awk criteria1=^abc > /home/destn_file.dat


Thanks,
Rock
# 4  
Old 01-24-2007
Do you want to find strings starting with text ( for ex : "abc" ) without using the wild characters?
Code:
awk -F, '{ if( substr($1,1,3) == "abc" ) print $1 }' file1

# 5  
Old 01-24-2007
# all lines which start with abc
grep "^abc" file
#all line which end with abd
grep "abc$" file
#all line with abc somewhere in it
grep "abc" file
#all line with only abc and nothing else
grep "^abc$"
#all line with only only abc and leading and trailing whitespace
grep "^[ ]*abc[ ]*$"
Between the brackets [] has to be space and a tab.
# 6  
Old 01-24-2007
Quote:
Originally Posted by Rock
I can extract all strings start with abc (like abc*) with the symbol '^'. Is there any similiar method to handle the wildcard situation?

e.g.
cat /home/source_file.dat | awk -f /home/filter.awk criteria1=^abc > /home/destn_file.dat
Code:
awk -f /home/filter.awk criteria1="^\\\*"  \
/home/source_file.dat > /home/destn_file.dat

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