End of file in AWK

claw82 · #1 (**permalink**) 1 Week Ago

Hello!

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

Thanks!

Franklin52 · #2 (**permalink**) 1 Week Ago

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

ghostdog74 · #3 (**permalink**) 1 Week Ago

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

radoulov · #4 (**permalink**) 1 Week Ago

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.

claw82 · #5 (**permalink**) 4 Days Ago

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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