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Add a line after last occurnace of a pattern.

 
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# 1  
Old 12-07-2007
Add a line after last occurnace of a pattern.
Hey guys,

I was looking for a simple script to add a line after a pattern. Only that the pattern can occur tons of times in a file.

I have to add a line once after the "last" occurance of the pattern.

eg. file xyz

agwer
asdf234
pattern...
212541234
df
pattern
.
.
.
.
last occurance of pattern
(LINE ADDED HERE)
.
.
.
.
file ends


Hope I was clear here.

-n_rajitr
# 2  
Old 12-07-2007
tac file | sed -e '1,/pattern/G' | tac

u can reduce this to a single line sed command, if you are able to find the command in sed for finding the last command

Hope this helps you

Rakesh UV
# 3  
Old 12-07-2007
Code:
awk 'NR == FNR {
	if ($0 ~ /pattern/)
		x=FNR+1
		next
}
FNR == x { 
	print "added line"
}1' filename filename

Use nawk or /usr/xpg4/bin/awk on Solaris.
 
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