Re: [exim-dev] fopen(), umask, and file permissions

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Auteur: Philip Hazel
Date:  
À: Wakko Warner
CC: exim-dev
Sujet: Re: [exim-dev] fopen(), umask, and file permissions
On Wed, 22 Feb 2006, Wakko Warner wrote:

> You're creating a file with mode 777 and later chmodding it.


No, I'm creating it with mode 000.

> I don't know the code that uses fopen, but it could also be possible that a
> file that already exsists with a specific mode gets it's mode clobbered.


These files should not exist - they are all "working files" used by the
content scanning code. Anyway, whether they exist or not, they should
all have the mode that is being set for them.

> One could use open(2) then fdopen(3), but again, I don't know the code well
> enough to know for sure.


That is another possibility, but it would involve decoding the second
argument of "fopen", and I'm not sure it is worth it.

-- 
Philip Hazel            University of Cambridge Computing Service
Get the Exim 4 book:    http://www.uit.co.uk/exim-book