Re: forwarded weirdness report

[Chet Ramey]

On 3/28/22 3:06 PM, Martin Schulte wrote:
> Hello,
>
> on Mon, 28 Mar 2022 20:34:40 +0200 Alex fxmbsw7 Ratchev <fxmbsw7@gmail.com> 
> wrote:
> > https://pastebin.com/raw/T7ZnFapt
> >
> > about inconsitency, about chets 'uh no bugs'
> >
> > ive experienced this and such x times already ( got better, this is not my
> > code )
>
> Here's a somewhat stripped down version:
>
> $ bash --noprofile --norc -i -c "echo \$BASH_VERSION; shopt -s expand_aliases ; source <(echo 
> \"alias x='echo hallo'\"); alias; x"
> 5.1.4(1)-release
> alias x='echo hallo'
> bash: x: command not found

OK, once more from the top.

The argument to -c is a single command. Bash always reads a complete 
command before executing any of it. The argument string is parsed into a
compound command: a compound list. Since the entire compound list is parsed
before executing any of the commands it contains, the `x' is parsed as a
simple command with no defined alias -- the parsing takes place before
executing the `alias x=...' command.

--
``The lyf so short, the craft so long to lerne.'' - Chaucer
                 ``Ars longa, vita brevis'' - Hippocrates
Chet Ramey, UTech, CWRU    chet@case.edu    http://tiswww.cwru.edu/~chet/