[OT] figuring out which files have F_CLOEXEC
nick at ccl4.org
Fri Mar 27 16:30:54 GMT 2009
Sorry for mentioning the four letter word, but I have a problem.
Without resorting to XS, Inline, or similar skulduggery, is there a way to
do the following:
1: Work out which file descriptors have F_CLOEXEC set
2: Close those that do
[without doing an exec :-)]
My problem seems to be that I
1: Can't call fcntl to enquire about F_CLOEXEC without having a file handle.
2: Whilst I can create a Perl file handle from a number, to get a
handle open on that numeric file descriptor, I
3: now have a file handle open which uses that very numeric file descriptor
4: so if it goes out of scope, or otherwise is closed, the numeric file
descriptor gets closed, come what may,
5: which isn't what I want, as I want to keep open files that have F_CLOEXEC
and I can't see a way round this.
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