--- - branch: MAIN date: Thu Aug 29 15:22:08 UTC 2019 files: - new: '1.5' old: '1.4' path: src/share/man/man4/null.4 pathrev: src/share/man/man4/null.4@1.5 type: modified id: 20190829T152208Z.436432a179a51feb0b2470359b437d4be60166e5 log: | Earliest reference to /dev/null I can find is in v4 sh(1) and nulldev in nsys/ken/subr.c via TUHS archive https://minnie.tuhs.org/cgi-bin/utree.pl?file=V4 module: src subject: 'CVS commit: src/share/man/man4' unixtime: '1567092128' user: sevan