sh changes
Andrew Koenig
ark at alice.UucP
Thu Jun 19 01:42:02 AEST 1986
> In case you missed it, the difference is the extra colon in the Sun 3.0
> system. Questions: when and why was this change made? Are there any
> other variants of Unix with this change? Has anybody's command file
> broken on account of this?
In case you missed it, the other difference is "if parameter is set"
vs. "if parameter is set and non-null." I believe that the Sys V
shell supports both usages. The point is that a parameter that
is not set is not necessarily the same as one that is set to null.
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