On Thu, 11 Feb 2016, Makarius wrote:
I am a long-term user of GNU bash who is depending on the "export -f" feature
of that shell (in an application that is on the free market for decades). The
bash guys turn a shell function "foo" into the environment variable
"BASH_FUNC_foo%%" and hope to be able to pick it up later on.
Dash gets into this game, because Ubuntu and Debian have chosen to make it
the default for /bin/sh some years ago. This means that typical "system"
invocations of Unix tools and libraries are now going through dash: /bin/sh
-c is often seen in practice instead of more delicate execve invocations.
This means with /bin/sh -> dash users have no proper chance to avoid it.
Sitting right there in the center /bin/sh, dash acquires special
responsibilities to play nice with other shells.
After reading the official (!) sources of bash-4.3, I've found out the
following: Not the bash guys are introducing this ill-formed name
decoration "%%", but the Debian guys. See
http://sourcesdev.debian.net/patches/bash/4.3-14/bash43-027.diff
This means dash is not working against bash, but against Debian. Or
rather: Debian is working against themselves and their users.
Makarius
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