Date: Tue, 15 Oct 2002 12:30:17 -0500 From: Dan Nelson <dnelson@allantgroup.com> To: alireza mahini <alirezamahini@yahoo.com> Cc: questions@FreeBSD.ORG Subject: Re: How can i use the socket that created by a child in parent? Message-ID: <20021015173016.GB16975@dan.emsphone.com> In-Reply-To: <20021015171750.59644.qmail@web40702.mail.yahoo.com> References: <20021015171750.59644.qmail@web40702.mail.yahoo.com>
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In the last episode (Oct 15), alireza mahini said:
> I create a stream socket in a child process and i want
> to use it outside of child.
> main(){
> int sd;
> int fd[2];
> char buf[20];
> pipe(fd));
> if(!fork()){
> sd=socket();
> ...
> ...
> write(fd[1]....);//write sd to the pipe
> }
> read(fd[0],...)//read sd from pipe
> send(sd,....);//error is occured in this line at
> executing the program
> ...
> }
> I understand that the descriptors don't send via pipe
> to the outside of childs so guide me please.
You'll need to use the sendmsg() and recvmsg() functions to pass the
descriptor. See the unix(4), and recvmsg(2) manpages for more info.
--
Dan Nelson
dnelson@allantgroup.com
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