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Re: Future shell work - comments reqyuested
Robert Elz <kre%munnari.OZ.AU@localhost> wrote:
|| I think the standard says IN and ERR rather than IN and OUT for
|| this condition?!
|It does, but we implement the latter (always have I think) - not sure
|whether that should be changed or not, or what the effects might be.
Yes, it does. If possible it should be changed, then. At least
in $POSIXLY_CORRECT / posix mode. I think the virtue would be to
be standard compliant while still being able to rock it.
|| fact it seems i never understood why this should be in and err,
|They are the fd's that the shell (as distinct from utilities that it
|runs, including built in ones) actually read from and write to.
Not to forget out!!
|| i think i thought use cases like "< template prog" to start into
|| interactive mode should be valid.
|That wouldn't just start, it would start and finish. When the shell
|reads eof on its input file (stdin in a case like this) it exits.
My console library only supports fullscreen mode. I don't know,
for that "< template prog 2>err.log" could very well have been
a valid interactive case, too. It was an error to hard code that
dependency, i see this now. For the MUA i think i should try to
end up with a logically sensitive detection of "interactive",
possibly allowing the user to force interactivity. Unfortunately
-i is given to "ignore SIGINT", only -I could be used.
|But perhaps I am misunderstanding what you meant?
Oh, it is ok to talk about a shell. We are learning from that.
|It is possible to do
| sh -sic '. template'
|to start an interactive shell after reading a template file (the -i works
|there because -s is also specified.)
And there is a lot to learn. .. Interesting, this seems to be
a speciality of the Almquist SHell, bash and mksh simply logout
?0[sdaoden@wales sdaoden]$ echo 'echo bla'|sh -sic 'echo da'
Logging out ... and:
?0[sdaoden@wales sdaoden]$ sh -sic 'echo da'
Logging out ... and:
dash logs out only the former.
|Der Kragenbaer, The moon bear,
|der holt sich munter he cheerfully and one by one
|einen nach dem anderen runter wa.ks himself off
|(By Robert Gernhardt)
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