New Features in Version 7
Many new features were introduced in Version 7.
- Programming tools: lex, yacc, lint, pcc, and make.
These first appeared in the Research Unix lineage in Version 7, although early versions of some of them had already been picked up by PWB/UNIX.
- New commands: the Bourne shell, at, awk, calendar, f77, fortune, tar (replacing the tp command), touch, uucp
- New system calls: access, acct, alarm, chroot (originally used to test the v7 distribution during preparation), ioctl, lseek (previously only 24-bit offsets were available), umask, utime
- New library calls: The new stdio routines, malloc, getenv, popen/system
- Environment variables
- The #! convention
The combination of the Bourne shell and the hashbang convention meant that scripts and scripting languages could provide the same user experience as native C programs.
Read more about this topic: Version 7 Unix
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