Timeline for Why is `[` a shell builtin and `[[` a shell keyword?

8 events

when toggle format	what		by	license	comment
Mar 3, 2015 at 6:06	history	edited	Anthon	CC BY-SA 3.0	edited body
Feb 10, 2015 at 6:46	comment	added	Volker Siegel		@JonathanLeffler Oh, thanks, I missed that `[` is both - that means some changes...
Feb 10, 2015 at 6:15	comment	added	Jonathan Leffler		Note that although `[` was originally an external command, it was added as a built-in to the shell quite early on, probably by the time Unix System III was released and definitely before Unix System V was released. So, the 'extra process' hasn't been a problem for ages. However, the syntax remained unchanged — it was treated as if it would be an external command.
Feb 10, 2015 at 6:07	history	edited	Volker Siegel	CC BY-SA 3.0	Add details.
S Feb 10, 2015 at 5:55	history	edited	Volker Siegel	CC BY-SA 3.0	Fix ] to [ etc.
S Feb 10, 2015 at 5:55	history	suggested	Jonathan Leffler	CC BY-SA 3.0	Fix ] to [ etc.
Feb 10, 2015 at 5:47	review	Suggested edits
S Feb 10, 2015 at 5:55
Feb 9, 2015 at 19:22	history	answered	Volker Siegel	CC BY-SA 3.0