I think it is the order of expansions:
The order of expansions is:
brace
, tilde expansion, parameter,
expansion
variable
and arithmetic expansion and
command substitution (done in a
left-to-right fashion), word
splitting, andpathname expansion
.
So if your variable is substituted, brace expansion doesn’t take place anymore. This works for me:
eval ls $dirs
Be very careful with eval. It will execute the stuff verbatimly. So if dirs contains f{m,k}t*; some_command
, some_command will be executed after the ls finished. It will execute the string you give to eval
in the current shell. It will pass /content/dev01 /content/dev02
to ls, whether they exist or not. Putting *
after the stuff makes it a pathname-expansion, and it will omit non-existing paths:
dirs=/content/{dev01,dev02}*
I’m not 100% sure about this, but it makes sense to me.