Garrick Staples wrote:
On Tue, Feb 26, 2008 at 04:33:30PM -0600, Les Mikesell alleged:
Does anyone have a quick reference to the order of operations as the
shell parses a command line (variable parsing,i/o redirection, wildcard
and variable expansion, splitting on IFS, quote removal, command
substitution etc.)? That's really the first thing you need to know
about the shell and if there is a simple description it must be buried
in the middle of some obscure manual.
This is from the "EXPANSION" section of the bash manpage:
The order of expansions is: brace expansion, tilde expansion, parameter, variable and arithmetic
expansion and command substitution (done in a left-to-right fashion), word splitting, and pathname
expansion.
That's one step in the bigger picture. I want the one that includes
variable assignment, i/o redirection, quote removal, and a few other
operations. I think I knew that a few decades ago, but now I don't even
know where to look it up.
--
Les Mikesell
lesmikesell@xxxxxxxxx
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