5 Jan
2020
5 Jan
'20
8:41 a.m.
On 1/4/20 6:53 PM, Dave Horsfall wrote:
On Sat, 4 Jan 2020, Chet Ramey wrote:
Define "true comment." The v7 shell had `#' as the comment character, but
it only worked when in non-interactive shells. I think it was the Sys III
shell that made it work when the shell was interactive.
This is, incidentally, why bash has the `interactive_comments' option,
which I saw in another message. BSD, which most of the GNU developers were
using at the (pre-POSIX) time, used the v7 shell and didn't have
interactive comments. When a sufficiently-advanced POSIX draft required
them, we added it.
--
``The lyf so short, the craft so long to lerne.'' - Chaucer
``Ars longa, vita brevis'' - Hippocrates
Chet Ramey, UTech, CWRU chet(a)case.edu http://tiswww.cwru.edu/~chet/
It's elegant until you forget that `:'
continues to process redirections.
So just keep remembering that it's an actual command :-)
Which reminds me: which Shell introduced "#" as a true comment?