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Read command stop on either EOF or a specific line

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# 1  
Old 07-22-2014
Read command stop on either EOF or a specific line
I'm trying to stop reading a file until the end of the file is reached or a defined delimiter line is reached. Some how I need to test the fail state of the last 2 commands, not just the last command.

Code:
echo -e "hello\ngoodbye\n####\ntesting" | while read line; [[ "$line" != "####" ]]; do echo "$line"; done
hello
goodbye

However
Code:
echo -e "hello\ngoodbye\n####\ntesting" | while read line; [[ "$line" != "XXXX" ]]; do echo "$line"; do

keeps running expecting input.

I tried
Code:
echo -e "hello\ngoodbye\n####\ntesting" | while read line; [[ "$?" -ne 0 || "$line" != "XXXX" ]]; do echo "$line"; done

but it does not work.

Mike
Last edited by Michael Stora; 07-22-2014 at 04:51 PM..
# 2  
Old 07-22-2014
Try
Code:
echo -e "hello\ngoodbye\n####\ntesting" | while read line && [ "$line" != "XXXX" ]; do echo "$line"; done
hello
goodbye
####
testing

This User Gave Thanks to RudiC For This Post:
Michael Stora
# 3  
Old 07-22-2014
Code:
perl -ne 'last if /####/ or eof;print' infile

# 4  
Old 07-22-2014
You mysteriously switched "####" in your examples to "XXXX". Which is it?

Code:
sed -n "/####/q;p" file

# 5  
Old 07-22-2014
Quote:
Originally Posted by Scott
You mysteriously switched "####" in your examples to "XXXX". Which is it?

Code:
sed -n "/####/q;p" file

No mystery. My question is how to detect EOF when the defined delimiter is not present.

RudiC's answer was perfect. I want to do other things in the while loop with $line and I want to do things with the rest of stdin after the second delimiter line.

Mike
This User Gave Thanks to Michael Stora For This Post:
Scott
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