* Maximum number of file descriptors that may be passed via SCM_RIGHTS @ 2011-05-25 23:57 Sam Varshavchik [not found] ` <cone.1306367829.726700.9970.500-eRFusrvvrKWtZOM0fQ182pBYcbvojoGw@public.gmane.org> 0 siblings, 1 reply; 2+ messages in thread From: Sam Varshavchik @ 2011-05-25 23:57 UTC (permalink / raw) To: linux-man-u79uwXL29TY76Z2rM5mHXA [-- Attachment #1: Type: text/plain, Size: 421 bytes --] Anyone knows if the maximum number of file descriptors that can be passed via SCM_RIGHTS is documented anywhere? Up to at least 2.6.35, I could stuff as many as 255 file descriptors. Which sort of made sense. I updated to Fedora 15, which is based on 2.6.38, and the maximum number of file descriptors I can stuff into a message seems to be 253. With 254, strace tells me that the kernel refuses with EINVAL. [-- Attachment #2: Type: application/pgp-signature, Size: 198 bytes --] ^ permalink raw reply [flat|nested] 2+ messages in thread
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* Re: Maximum number of file descriptors that may be passed via SCM_RIGHTS [not found] ` <cone.1306367829.726700.9970.500-eRFusrvvrKWtZOM0fQ182pBYcbvojoGw@public.gmane.org> @ 2011-09-14 6:07 ` Michael Kerrisk 0 siblings, 0 replies; 2+ messages in thread From: Michael Kerrisk @ 2011-09-14 6:07 UTC (permalink / raw) To: Sam Varshavchik; +Cc: linux-man-u79uwXL29TY76Z2rM5mHXA Hello Sam, On Thu, May 26, 2011 at 1:57 AM, Sam Varshavchik <mrsam-W1w4QoW4mIDgLSHwZvcCBg@public.gmane.org> wrote: > Anyone knows if the maximum number of file descriptors that can be passed > via SCM_RIGHTS is documented anywhere? > > Up to at least 2.6.35, I could stuff as many as 255 file descriptors. Which > sort of made sense. > > I updated to Fedora 15, which is based on 2.6.38, and the maximum number of > file descriptors I can stuff into a message seems to be 253. With 254, > strace tells me that the kernel refuses with EINVAL. No info on this sorry. Let me know if you determine(d) the details. Cheers, Michael -- Michael Kerrisk Linux man-pages maintainer; http://www.kernel.org/doc/man-pages/ Author of "The Linux Programming Interface"; http://man7.org/tlpi/ -- To unsubscribe from this list: send the line "unsubscribe linux-man" in the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html ^ permalink raw reply [flat|nested] 2+ messages in thread
end of thread, other threads:[~2011-09-14 6:07 UTC | newest] Thread overview: 2+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2011-05-25 23:57 Maximum number of file descriptors that may be passed via SCM_RIGHTS Sam Varshavchik [not found] ` <cone.1306367829.726700.9970.500-eRFusrvvrKWtZOM0fQ182pBYcbvojoGw@public.gmane.org> 2011-09-14 6:07 ` Michael Kerrisk
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