On Mon, 03 Jun 2013 21:57:07 -0500, Doug Hardie <bc...@lafn.org> wrote:
I have an unusual situation. A program is doing a DNS lookup and often the IP address has no reverse DNS entries. As a result the program hangs for several timeouts. The call is not being made directly in its code, but is occurring in a system call. There are no specific calls to DNS, its something else doing it. I have been trying to track down which system call is doing it, but without success so far. I have tried syslog calls around each of the system calls I thought might be the culprit, but my guessing is not very good. How can I identify the system call that is calling DNS? If I can find it, I hopefully can find another way to do whatever it does that does not involve a reverse DNS lookup.
The system DNS lookups are handled by libc. Probably somewhere in the code here:
http://svnweb.freebsd.org/base/head/lib/libc/nameser/ _______________________________________________ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "freebsd-questions-unsubscr...@freebsd.org"
