[Bug libc/10353] Methods for deleting all file descriptors greater than given integer (closefrom)

["stsp at users dot sourceforge.net" <sourceware-bugzilla@sourceware.org>]

https://sourceware.org/bugzilla/show_bug.cgi?id=10353

Stas Sergeev <stsp at users dot sourceforge.net> changed:

           What    |Removed                     |Added
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                 CC|                            |stsp at users dot sourceforge.net

--- Comment #19 from Stas Sergeev <stsp at users dot sourceforge.net> ---
Hi.

What do you think about this closefrom() to only set
FD_CLOEXEC rather than to do the actual close()?
Seems more consistent to me.
- compatible with popen(), posix_spawn(), system() and co
as you can just do it before fork()
- does exactly what we need, and in a less invasive way -
don't we need to close files only at exec()?
- clearly underlines the fact that O_CLOEXEC should have
been on by default since the creation of posix, but its not.
So it fixes exactly that rather than working around that by
doing explicit close().

Just an idea.

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