Carson Gaspar wrote:
> Christopher Gorski wrote:
>
>> I noticed that the first calls in the "cp" and "ls" to getdents() return
>> similar file lists, with the same values.
>>
>> However, in the "ls", it makes a second call to getdents():
>
> If this is Sun's cp, file a bug. It's failing to notice that it didn't
> provide a large enough buffer to getdents(), so it only got partial results.
>
> Of course, the getdents() API is rather unfortunate. It appears the only
> safe algorithm is:
>
> while ((r = getdents(...)) > 0) {
> /* process results */
> }
> if (r < 0) {
> /* handle error */
> }
>
> You _always_ have to call it at least twice to be sure you've gotten
> everything.
>
Yes, it is Sun's cp. I'm trying, with some difficulty, to figure out
exactly how to reproduce this error in a way not specific to my data. I
copied a set of randomly generated files with a deep directory structure
and cp seems to correctly call getdents() multiple times.
-Chris
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