add closefrom() call

[Peter Jeremy]

On 2007-Jul-15 16:51:38 -0700, Julian Elischer <julian at elischer.org> wrote:
>> void
>> closefrom(int lowfd)
>> {
>> 	fcntl(lowfd, F_CLOSEM, NULL);
>> }
>
>what on earth would that achieve?
>(as opposed to just a simple syscall)

The only benefit I can think of is minimising the number of syscalls.
Is there any other benefit?

-- 
Peter Jeremy
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