On Mon, Dec 27, 2010 at 10:51 PM, Rodolfo Alcazar Portillo
<nosp...@gmail.com> wrote:
> On Mon, 2010-12-27 at 13:31 -0500, Chris Tyler wrote:
>> On Mon, 2010-12-27 at 17:05 +0100, Rodolfo Alcazar Portillo wrote:
>> > Hello. See this:
>> >
>> > # A="echo 'hi'"
>> >
>> > # echo $($A)
>> > 'hi'
>> >
>> > # echo 'hi'
>> > hi
>> >
>> > Does anyone understand why does the first command
>> > evals the echo but echoes the simple quotes?
>>
>> $() provides a type of quoting, so it's evaluated similar to:
>>
>>    "echo" "'hi'"
>>
>> which produces the observed result.
>
> Hmmm. Somehow obvious. Is that "type of quoting" documented
> somewhere? Why does it eval just the first word?

While I don't agree with the above characterization the process is
documented in the EXPANSION section of the bash manpage.

John
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