LinuxQuestions.org - Redirecting socket output to a file

Hi,

I need help on these questions:
a) How do I redirect the data that flows through a socket to a file, without cutting the flow?
b) Can a file number be returned from a function, and when I do a read() or a write() call, will it remain the same? (see below).

What I was thinking for the first question is to:
- create a pipe with the pipe() system call
- make the file descriptor of the "write" side of the pipe to be the same as the file descriptor of the socket
- create a file with the O_ASYNC flag, in so a way that when there's something to be written to the file, a signal is sent.
- make the file descriptor of the "read" side of the pipe to be the same as the file descriptor of this file.

But there are two things:
a) Is there a better approach?
b) How do I open() a file that has the file descriptor number I want?

What I was thinking for the second question was:

Code:

void mkchild(int fd)

{

    struct child_struct child;

    child->sockfd = fd;

    send(child->sockfd, ...);  /* will this work? */

}



void getsock(void)

{

    int sockfd;

    sockfd = accept();

    mkchild(sockfd);

}

But I don't know if it'll work.

Thanks in advance.