Date: Fri, 26 Jan 2001 10:33:44 -0800 (PST) From: Matt Dillon <dillon@earth.backplane.com> To: mouss <usebsd@free.fr> Cc: hackers@FreeBSD.ORG Subject: Re: [kernel patch] fcntl(...) to close many descriptors Message-ID: <200101261833.f0QIXi434137@earth.backplane.com> References: <4.3.0.20010126193228.06e2a200@bluesun>
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I think it is worth doing. A quick google search shows that
the linux folks discussed the AIX thingy in March 1999, but
I don't think they actually implemented. From the discussion,
it appears that the fcntl would be useful and (not having seen
your patches), almost certainly trivial to implement.
-Matt
:Hi,
:
:I've modified the kerenl to add F_CLOSEM functionality to fcntl.
:(I've seen this in some AIX docs).
:
:The purpose is allow a process to close all its filedescriptors starting
:from a given value without issuing thousands of close() syscalls.
:This may be used for programs that daemonize themselves (or one of
:their children) after some amount of work, when many fd's has been
:opened. The program would simply call
: fcntl(minclose, F_CLOSEM, 0);
:
:The patch concerns /sys/kern/kern_descriptors.c and fcntl.h
:(and of course the corresponding manpage).
:
:Is this functionality worth inclusion in the kernel (or should I throw
:away the patch)? are there any kind souls to review the patch?
:
:cheers,
:mouss
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