laes_
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quote problem in awk
i get unmatch problem in awk
cat file| awk ' { if($0 ~/^val=track/) { print "/bin/awk '{ print $4 ; exit 0 }'" } else { print $2 } }'
the problem is due to the awk quote in the if block ("/bin/awk '=> this quote cause the crash)
even if i place a back slash before (i.e /bin/awk \') it stays the same problem
so could u help me
thanks
cat file| awk ' { if($0 ~/^val=track/) { print "/bin/awk '{ print $4 ; exit 0 }'" } else { print $2 } }'
the problem is due to the awk quote in the if block ("/bin/awk '=> this quote cause the crash)
even if i place a back slash before (i.e /bin/awk \') it stays the same problem
so could u help me
thanks
man sh
Backslash has no special meaning inside a pair of single quotes.
...
but a single quote can not be quoted inside a pair of single quotes.
..
Will this command work as you like?
awk '/^val=track/{print $4; next};{print $2}' file
it's not you have asked for
that is closer for your question:
awk "/^val=track/{ print \"/bin/awk '{print \$4; exit 0}'\"; next};{print \$2}"
Also if you want to get real $4 instead of just literal:
awk "/^val=track/{ print \"/bin/awk '{print \" $4 \"; exit 0}'\"; next};{print \$2}"
Backslash has no special meaning inside a pair of single quotes.
...
but a single quote can not be quoted inside a pair of single quotes.
..
Will this command work as you like?
awk '/^val=track/{print $4; next};{print $2}' file
it's not you have asked for
that is closer for your question:
awk "/^val=track/{ print \"/bin/awk '{print \$4; exit 0}'\"; next};{print \$2}"
Also if you want to get real $4 instead of just literal:
awk "/^val=track/{ print \"/bin/awk '{print \" $4 \"; exit 0}'\"; next};{print \$2}"
ASKER
i have resolved the problem
i put the awk command into file with this quote
and i called awk -f awkscript file
i put the awk command into file with this quote
and i called awk -f awkscript file
Using two single quotes inside the pair of single quotes that delimit the awk statement also works.
ASKER CERTIFIED SOLUTION
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Use two single quotes:
cat file| awk ' { if($0 ~/^val=track/) { print "/bin/awk ''{ print $4 ; exit 0 }''" } else { print $2 } }'