Re: [PATCH 2/3] sendfd, recvf pass file descriptors along Unix domain sockets

[Paolo Bonzini]

On 03/03/2011 10:33 PM, Eric Blake wrote:
> I just createdhttp://sourceware.org/bugzilla/show_bug.cgi?id=12539  - it
> would be nice if the kernel and glibc would give us a way to atomically
> set the FD_CLOEXEC flag on fd's created by recvfd.  But even without
> atomic support from the kernel, it would be nice for gnulib to provide
> provide something like recvfd2(int sock, int flags), where flags can be
> O_CLOEXEC (or maybe SOCK_CLOEXEC), as a way to set it as soon as
> possible after receiving the fd, in anticipation of the kernel catching
> up and providing such an interface.

Good idea.  This is already implemented in the kernel as 
MSG_CMSG_CLOEXEC, but I like mapping it to O_CLOEXEC in the gnulib API.

Paolo