5 Jan
2020
5 Jan
'20
2:15 p.m.
V7 indeed did not have "#" as a comment. Programs use the ":" command
for that, and was careful of what was in the comment. The ":" command was called
SYSNULL in the source.
Later versions of Steve's shell had COMCHAR defined to be a "#" and
tested for that symbol in word(), eating up all the characters until it got to a newline.
The version of Seventh Edition I used to carry around and embed in things had that mod. My
original Seventh did not.
On Jan 4, 2020, at 9:44 PM, Chet Ramey
<chet.ramey(a)case.edu> wrote:
On 1/4/20 8:49 PM, Adam Thornton wrote:
v7 Bourne shell does not appear to treat
'#' as a comment.
It does, when the shell is not interactive and reading input from a script,
pipe, or input redirection.
--
``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/