On Wed, Nov 28, 2012 at 8:57 PM, Richard Crowley <r...@rcrowley.org> wrote: > How does the standard library cluster module pass a newly-opened file > descriptor from a parent process to a child process in a way that > allows the child process to accept(2) and not get EBADF? > > I made it to src/tcp_wrap.cc and from there into libuv and then got lost. > > I only care about Linux. Does it use the CLONE_FILES flag to > clone(2)? (I don't think it does because I can't find it in the source > code but this seems to me like the only sane way to accomplish this.)
The child process inherits one end of an socketpair(AF_UNIX) tuple and sendmsg() with CMSG_DATA() is used to send over file descriptors. The meat of the code is in uv__write() in src/unix/stream.c. By the way, if you have more libuv specific questions, there's a libuv mailing list: http://groups.google.com/group/libuv -- Job Board: http://jobs.nodejs.org/ Posting guidelines: https://github.com/joyent/node/wiki/Mailing-List-Posting-Guidelines You received this message because you are subscribed to the Google Groups "nodejs" group. To post to this group, send email to nodejs@googlegroups.com To unsubscribe from this group, send email to nodejs+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/nodejs?hl=en?hl=en
