sockstat и знаки вопроса

Знаки вопроса увидел в ответе sockstat на FreeBSD 8.3

sockstat -4 | grep 3308

 sockstat и знаки вопроса

Объяснение простое

The question marks in sockstat are intended behaviour and not a bug. 

The change between 8.2 and 8.3 is that sockstat now also shows sockets that are not associated with a file descriptor. Formerly, these were not shown, causing a discrepancy between sockstat and netstat -a because netstat has always shown them.

freebsd.org

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