[cs631apue] How *nix commands support regex ?

[Minhui Gu]

It's true. I tried to printf all argv and found them already expanded in
the output.
Maybe we should look into a real shell source for details.

-Minhui


On Fri, Sep 6, 2013 at 10:32 PM, Nick Smith <nsmith1 at stevens.edu> wrote:

>  Hongyi,
> This expansion is handled in the shell, before the command is executed.
> For example, with the following:
> $ tree test
> test
> ├── a
> ├── b
> └── c
>
> 0 directories, 3 files
> $ cp test/* /tmp
>
> cp here receives 4 parameters,
> test/a
> test/b
> test/c
> /tmp
>
> Hope that helps
> -Nick
>
>
> On 09/06/2013 09:15 PM, Hongyi Shen wrote:
>
> Sorry, it's me again.
> When comes to the commands like ls, rm, mv, cp, how do they handle the
> operands with regular expressions? Is there a library contains regex parser
> or something like that?
>
>  I failed to found that in source code or search on Google. I tried to
> use strace, but it only present system calls.
>
>
>  Hongyi Shen.
>
>
>
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