[Bug 10231] /bin/sh not handling some environment variable

bugzilla at busybox.net bugzilla at busybox.net
Thu Aug 24 15:53:43 UTC 2017


--- Comment #3 from Ron Yorston <rmy at pobox.com> ---
Environment variables are defined here:


Environment variable names can contain pretty much anything apart from '='.

However, shell variable ('parameter') names are much more restricted.  Section
2.3.2 of this document covers parameter expansion:


and points to the definition of an 'XBD Name':


where an 'XBD Name' is defined as:

In the shell command language, a word consisting solely of underscores, digits,
and alphabetics from the portable character set. The first character of a name
is not a digit.

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