[OpenWrt-Devel] Question regarding call python script

Bastian Bittorf bittorf at bluebottle.com
Fri Mar 11 05:51:46 EST 2016

* Paul Fertser <fercerpav at gmail.com> [11.03.2016 11:15]:
> As a sidenote, POSIX shell doesn't support associative arrays (which
> were mentioned in this thread), so it's probably worth clarifying
> whether it's ok to require bash >= 4 for OpenWrt build scripts or not.

yes, POSIX is "missing" some goodies of a full bash but:

"Stick to portable constructs where possible, and
 you will make somebody's life easier in the future.
 Maybe your own."

For all things you can use a workaround.
So, if you need an array e.g.


for e.g. easy iterating over it? use e.g. this approach:

	local message="$1"
	local dim1="$2"
	local dim2="$3"

	eval ${ARRAYNAME:-default}_${dim1}_${dim2}='$message'

	local dim1="$1"
	local dim2="$2"
	local var

	eval var="\"\${${ARRAYNAME:-default}_${dim1}_${dim2}:-unset}\""
	echo "$var"

array_set "test" 7
array_get 7

or for 2-dimensional arrays:
array_set "2dim" 3 14
array_get 3 14

you can simplify this by removing dim2 and ARRAYNAME if this is too much.

bye, bastian
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