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Ask HN: Why is CD.. in the root directory not an error?
2 points
by
oweiler
on Feb 19, 2023
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2 comments
The title says it all. Why is the resulting status code 0?
$ cd / $ cd .. $ echo $? # is 0, but shouldn't that be 1?
josephcsible
on Feb 19, 2023
[–]
If ".." didn't exist in the root directory, then it would be an error. But it does exist, and it just points back at itself like "." does.
simonblack
on Feb 20, 2023
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parent
[–]
Just like zero is the lowest number you can obtain in an unsigned number series.
0 -1 = 0;
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