Messages in this thread | | | Date | Thu, 06 Sep 2007 15:38:58 +0200 | From | "Michael Kerrisk" <> | Subject | Re: O_CLOEXEC / MSG_CMSG_CLOEXEC documentation |
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Ulrich,
> On 9/5/07, Michael Kerrisk <mtk-manpages@gmx.net> wrote: > > O_CLOEXEC (Since Linux 2.6.23) > > Enable the close-on-exec flag for the new file > > descriptor. This is useful in multithreaded programs > > since using a separate fcntl(2) F_SETFD operation to > > set the FD_CLOEXEC flag does not suffice to avoid race > > conditions in multithreaded programs where one thread > > opens a file descriptor at the same time as another > > thread does a fork(2) plus execve(2). > > Correct,
Good. Thanks.
> although you might want to reconsider the repetition of "in > multithreaded programs".
Yes.
> Plus, it's also useful in other programs since it avoids the > additional system call to fcntl.
Okay, I may add some words about this.
Cheers,
Michael -- Michael Kerrisk maintainer of Linux man pages Sections 2, 3, 4, 5, and 7
Want to help with man page maintenance? Grab the latest tarball at http://www.kernel.org/pub/linux/docs/manpages , read the HOWTOHELP file and grep the source files for 'FIXME'.
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