Adding text to end of line using awk -

i'll lay out. input test.bat files looks like:

awk '{ gsub("\r", "\n"); print $0;}' airtrac_data_frame001.txt  awk '{ gsub("\r", "\n"); print $0;}' airtrac_data_frame002.txt  ...  awk '{ gsub("\r", "\n"); print $0;}' airtrac_data_frame405.txt 

what want in end is:

awk '{ gsub("\r", "\n"); print $0;}' airtrac_data_frame001.txt airtrac_data_frame001.tst  awk '{ gsub("\r", "\n"); print $0;}' airtrac_data_frame002.txt airtrac_data_frame001.tst  ...  awk '{ gsub("\r", "\n"); print $0;}' airtrac_data_frame405.txt airtrac_data_frame001.tst 

this awk command takes file in , prints original nicely, saving file name appended.

cmd:

 awk '{temp = $7} {printf("%s\n", $0)}' mactounix_convert_line_return.bat 

output:

**awk '{temp = $7} {printf("%s\n", $0)}' mactounix_convert_line_return.bat** 

the problem when try append captured string end of line

cmd:

awk '{temp = $7} {printf "%s %s\n", $0, temp}' mactounix_convert_line_return.bat 

output:

**airtrac_data_frame405.txtrint $0;}' airtrac_data_frame405.txt** 

it appears captured text ($7)is overwriting original string.

any appreciated.

not sure if understood requirement correctly based on input , output can try -

awk '{ a=$0; sub (/txt$/,"tst",$nf); print a,$nf}' file  [jaypal:~/temp] cat file awk '{ gsub("\r", "\n"); print $0;}' airtrac_data_frame001.txt awk '{ gsub("\r", "\n"); print $0;}' airtrac_data_frame002.txt awk '{ gsub("\r", "\n"); print $0;}' airtrac_data_frame405.txt  [jaypal:~/temp] awk '{ a=$0; sub (/txt$/,"tst",$nf); print a,$nf}' file awk '{ gsub("\r", "\n"); print $0;}' airtrac_data_frame001.txt airtrac_data_frame001.tst awk '{ gsub("\r", "\n"); print $0;}' airtrac_data_frame002.txt airtrac_data_frame002.tst awk '{ gsub("\r", "\n"); print $0;}' airtrac_data_frame405.txt airtrac_data_frame405.tst 

if intend redirect output new tst files you'll need > (re-direction) operator too. can add in between print statements.

awk '{ a=$0; sub (/txt$/,"tst",$nf); print a" > "$nf}' file