Date: Thu, 8 Dec 2016 15:31:32 +0100 From: Dimitri Staessens <dimitri.staessens@intec.ugent.be> To: Bob Bishop <rb@gid.co.uk> Cc: freebsd-bugs@freebsd.org Subject: Re: Call to accept() does not time out when setting SO_RCVTIMEO on a socket Message-ID: <3fc9cf5b-2e33-d667-0494-359ee6a93085@intec.ugent.be> In-Reply-To: <22926F6A-7E4A-49D4-BD54-1E81B1002D61@gid.co.uk> References: <76cee3a4-18d0-1f8c-eda3-e19c496c39b6@intec.ugent.be> <22926F6A-7E4A-49D4-BD54-1E81B1002D61@gid.co.uk>
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Hi Bob, thanks for the response. Setting the socket to non-blocking eats the CPU. I'll probably use select() or poll() with a single fd then. kind regards, Dimitri On 12/08/16 14:37, Bob Bishop wrote: > Hi, > >> On 8 Dec 2016, at 12:41, Dimitri Staessens <dimitri.staessens@intec.ugent.be> wrote: >> >> Dear devs, >> >> I'm trying to get an accept() call to time out using setsockopt. >> >> On Linux, the example below terminates: >> >> [dstaesse@phoneutria]$ gcc accept_st.c -o accept_st >> [dstaesse@phoneutria]$ ./accept_st >> Timeout is 0:100000. >> Check is 0:103333. >> Accept returned: Resource temporarily unavailable. >> Accept returned: Resource temporarily unavailable. >> Accept returned: Resource temporarily unavailable. >> Bye. >> >> On FreeBSD 11.0-RELEASE however, it hangs on the accept() forever. > > accept() doesn’t work like that on *BSD. Set the socket non-blocking and then accept() returns EWOULDBLOCK if there is nothing to accept. > >> Is this a known issue? >> >> Thanks for your help, >> >> Dimitri >> >> --- example source: >> [snip] >> -- >> Dimitri Staessens >> Ghent University - imec >> Dept. of Information Technology (INTEC) >> Internet Based Communication Networks and Services >> Technologiepark 15 >> 9052 Zwijnaarde >> T: +32 9 331 48 70 >> F: +32 9 331 48 99 > -- > Bob Bishop > rb@gid.co.uk > > > > -- Dimitri Staessens Ghent University - imec Dept. of Information Technology (INTEC) Internet Based Communication Networks and Services Technologiepark 15 9052 Zwijnaarde T: +32 9 331 48 70 F: +32 9 331 48 99
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