How to add filename to end of every line - all files in all subdirectories

Question

I want to add a line to my bash script (ubuntu 16) to add the filename to the end of every line in a file - that is every file in a folder and all files in all subfolders.

Filenames are alphanumeric with some special characters like -_.

For example:

Line in file filename_ghrut.txt before:

blah blah blah
blahblah blahblah

Line in file filename_ghrut.txt after:

blah blah blah filename_ghrut.txt
blahblah blahblah filename_ghrut.txt

I have searched around but most commands don't seem to work.

I want to run this on all files in all subfolders of a specific directory.

Big thanks.

I found this, but it doesn't quite work:

ls file{1..5}.txt|xargs -I% sed -i 's/$/;%/' %

Answer 1

With perl and find

find . -type f -exec perl -i -pe 's/$/ $ARGV/' {} +

• s/$/ $ARGV/ add space and filename to end of each line
• -i for inplace editing, use i.bkp if you want to retain a backup of original files
• If your find doesn't support +, use \; instead
• find . -type f will give list of all files in current directory
• -exec allows to use a command to act upon all those files
• Use find . -type f -name '*.txt' if you want to restrict to only files ending with .txt

Thanks @thiagowfx for pointing that above solution will add filename as ./file.txt, ./foo/file2.txt, etc

Use this to add only filename without any ./ etc

find . -type f -exec perl -i -pe 's/$/$ARGV=~s|.*\/| |r/e' {} +

• $ARGV=~s|.*\/| |r will give filename with all characters upto / removed

Answer 2

With GNU awk:

LC_ALL=C find . -type f -exec gawk -i /usr/share/awk/inplace.awk '
  BEGINFILE {suffix = FILENAME; sub(/.*\//, "", suffix)}
  {print $0, suffix}' {} +

Beware that if there are several hard links of the same file, the name for each will be added (in no particular order) to each line of that file.

In any case, do not use -i inplace as gawk tries to load the inplace extension (as inplace or inplace.awk) from the current working directory first, where someone could have planted malware. The path of the inplace extension supplied with gawk may vary with the system, see the output of gawk 'BEGIN{print ENVIRON["AWKPATH"]}'

Answer 3

Try this, using find and sed:

find /path/to/top_directory -type f -execdir sed -i -e "s/$/ {}/" {} \;

Replace /path/to/top_directory with the directory where the files you want to edit are.