Include first line with AWK and set output based on filename

Question

cat /path/to/file1 /path/to/file2 | awk '{if ($3~/^TCF/ || $3~/^GLI/) print $0;}' > /path/to/test1.txt

Do you know how to:

Include the first row in file1 in the test1.txt output? And, is it possible to include if TCF and GLI came from file1 or file2?

Thank you very much!

Answer 1

Try this command:

 awk '$3~/^TCF/ || $3~/^GLI/ || NR==1 { print FILENAME, $0 }' /path/to/file1 /path/to/file2 > /path/to/test1.txt

• NR is the current record number in the total input stream.
• FILENAME is the name of the current input file.

Answer 2

awk '{
      if ($3~/^TCF/ || $3~/^GLI/ || NR==1 ) 
      print $0,FILENAME
     }' /path/to/file1 /path/to/file2 >/path/to/test1.txt

Answer 3

Can be shorten some

awk '{if ($3~/^TCF|^GLI/ || NR==1 ) print $0,FILENAME}' /path/to/file1 /path/to/file2 > /path/to/test1.txt