Robert Elz <k...@munnari.oz.au> wrote: |I have more or less finished work on shell arithmetic, completing the |currently missing (not posix required, but allowed) operators, that is |the unary ++, -- (prefix & postfix) and the ',' operator. There's |nothing much to say (or ask) about that, but...
A pretty impressive run, if that comment is allowed! ... |Second, the -i (iinteractive) flag to sh is handled quite strangely on |the command line. After the shell has started it can be turned on or |off at will (doing so is not often an intelligent thing to do, but it |does have some uses.) But on the command line, unlike all other options, |it cannot simply be set - the shell deduces it is interactive when input |is from stdin, and stdin and stdout are ttys, and -i can be set, but only |in conjunction with -s. I think the standard says IN and ERR rather than IN and OUT for this condition?! One more problem i cannot handle in my MUA (currently, for the upcoming release), which unfortunately uses IN and OUT for that purpose. My console library used out and err, in fact it seems i never understood why this should be in and err, i think i thought use cases like "< template prog" to start into interactive mode should be valid. --steffen | |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)
