Keynote

Steve Bourne will talk about about sh/adb which he has never covered before in public. These include:

• sh memory management and interfaces used to interleave heap and stack these were not C stack
• sh has no string length or any other "arbitrary" length restrictions and what that meant for implementation
• sbrk and porting grief people had (things you dont think of when you write the code)
• my opinion of shellshock
• tricks used and why (eg using top bit of byte as quoted string marker)
• reasons we did all this and wouldn't do it today
• adb interesting problem it runs on one machine is debugging another and compiled on a third
• why i wrote it (Algol68 port) and Dennis added overlays (exec)
• invention of environment variables and why
• How I talked Dennis into putting 'void' into C and other C changes
• why setjmp and longjmp are a good idea (so I could write sh)
• why Bill Joy wrote the C shell