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End of file in AWK


 
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# 1  
Old 11-11-2009
End of file in AWK

Hello!

I need to control when i arrive to the end of my file, any built-in? or another way to do?

Thanks!
# 2  
Old 11-11-2009
No built-in for EOF in awk, you can do something like this:

Code:
awk -v eof=$(wc -l < file) '
NR==eof{print "Last line: " $0}
' file

# 3  
Old 11-11-2009
the so called "EOF" in awk is the END{} block or when getline returns 0. what do you want to "control" ?
Code:
# more file
1
2
3
$ awk 'BEGIN{ while(1) { if ( (getline line < "file") == 0 ) {print "eof: "line;break} } }'
eof: 3


Last edited by ghostdog74; 11-11-2009 at 09:28 AM..
# 4  
Old 11-11-2009
Quote:
Originally Posted by claw82
Hello!

I need to control when i arrive to the end of my file, any built-in? or another way to do?
[...]
You have the END special pattern. If more than one input file is processed you can either use the new experimental ENDFILE pattern (available with a separate patch for Gnu AWK) or write it yourself using the FILENAME built-in variable.

This link is also relevant.
# 5  
Old 11-16-2009
The solution proposed for Franklin is good for me, because i can't use the END instruction, i need to know the end of file in the body of my awk.

Thanks!

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