On the Unix Sources archive on The Unix Heritage Society website there are several tapes that Henry Spencer rescued. Among them is uk1.tar.gz which was created from several universities in the UK in 1980. There's a ton of my code there.
This tape has several files called cont.a - which are UNIX archive files - but they don't match V6 because they have a different magic number. I wrote a tape lister and extractor in Python 3 to read these - see rdar.
The cptree came from the Glasgow section of the tape - and seems a useful addition to V6.
The compile script compiles cptree.
You can delete all the files in a directory tree using:
rm -r DIRIf you need to add the -f flag, then it must be added as a separate argument:
rm -r -f DIRBut there is no -r flag to rmdir. The rmtree shell script will remove a whole tree. This script does:
rm -r -f DIRdeleting all the files under the directory.- generate a list of directories using find, and sort into reverse order
- edit the file to add rmdir to the start of each line
- execute the file to delete all the directories
- clean up the temporary files on /tmp