Date: 16 Jan 2016 19:03:50 +0000 From: "Mark Delany" <n7w@delta.emu.st> To: freebsd-hackers@freebsd.org Subject: Re: How to send EOF to the popen(3) pipe? Message-ID: <20160116190350.4824.qmail@f5-external.bushwire.net> In-Reply-To: <569A8508.80908@rawbw.com> References: <5699BAC9.3060407@rawbw.com> <5699C8AB.7070006@missouri.edu> <569A8508.80908@rawbw.com>
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On 16Jan16, Yuri allegedly wrote:
> No, pclose kills the process and returns the exit code. Half-closed
> connection though can be alive for a while, until the other side
> finishes and closes the pipe.
> I think the answer to my question is "no". popen(3) can't send EOF.
> Protocol needs to support EOF signal on the application-level.
Right.
Sounds like you need an fshutdown(FILE*, int how) that is analogous to
shutdown(2).
Unfortunately you can't hack it with:
fflush(FILE*);
shutdown(fileno(FILE*), SHUT_WR);
as shutdown() only works on sockets, not pipes.
I guess your best choice is to implement your own popen() with
socketpair() then you can shutdown() on it.
Mark.
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