sed - pattern match - apply substitution Post: 302981565

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Top Forums Shell Programming and Scripting sed - pattern match - apply substitution Post 302981565 by Don Cragun on Wednesday 14th of September 2016 03:41:12 PM

09-14-2016

Registered User

Quote:

Originally Posted by chill3chee

Thank you Ravinder Singh, RudiC, Don Cragun, Bakunin for your inputs. Have used the RudiC's suggestion along with Don's excellent considerations. The error I was facing for

Code:

sed "/$line/ s/^/--/g"

was

Code:

sed: Function TAB1_COL1 s/^/--/g cannot be parsed /

However, when in command prompt when I assign line=TAB1_COL1 and then sed "/$line/ s/^/--/g" gives me the correct result. However, used the awk solution for now. Bakunin, yes, you summarized accurately my requirement. Will give a try of your suggestion

Code:

sed '/'"$ITEM"'/ s/^/-- /'

There is no logical difference between the commands:

Code:

sed "/$line/ s/^/--/g"

and:

Code:

sed '/'"$line"'/ s/^/-- /'

The diagnostic message:

Code:

sed: Function TAB1_COL1 s/^/--/g cannot be parsed /

would be more likely to occur if the slashes around the pattern had been dropped... I.e.:

Code:

sed "$line s/^/--/g"

instead of:

Code:


Code:

sed "/$line/ s/^/--/g"

Don Cragun

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