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Using sed inside system call in awk

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Top Forums Shell Programming and Scripting Using sed inside system call in awk
# 8  
Old 07-20-2016
Quote:
Originally Posted by Yoda
Another approach:-
Code:
awk '/[^/]+/{sub(/\/$/,X)}1'

Hi Yoda, the / character needs to be escaped within an awk regex constant expression that is terminated by two slashes, even within a bracket expression:
Code:
awk '/[^\/]/{sub("/$",x)}1'


Quote:
Using a <slash> character within an ERE requires [the] escaping ...
awk: Regular Expressions



---
Other options:
Code:
sed 's|\(.\)/$|\1|'

Code:
perl -pe 's/(?<=.)\/$//'

Last edited by Scrutinizer; 07-20-2016 at 03:10 AM..
# 9  
Old 07-20-2016
Quote:
Originally Posted by Jcpratap
thanks

Code:
awk '/[^/]+/{sub(/\/$/,X)}1'

works

can you explain the same
/[^/]+/ - if record has one or more occurrence of any character other than / (to exclude root fs)

sub(/\/$/,X) - substitute or replace / in the end with X which is null or undefined variable.

1 - a non zero value or true, forces awk to print record.
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