You guys are correct on -r issue.
As I tested on bash and dash, checking for -f returns true for symlink
and file. So [ -f "$f" ] && [ -r "$f" ] should be OK as I fixed here.
[ -r $f -a ! -d $f ] && . $f && break is as good.
But I do not understand the meaning of following:
[ ! ]
So I did not include it. If I am incorrect, please tell me.
As for ennvironment variable, GDM reset it per its configuration even if
you set it before in /etc/environment. Look into ~/.dmrc which set it.
I will upload new version soon.
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