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Re: mkstemp

From: Eric Blake
Subject: Re: mkstemp
Date: Wed, 27 Apr 2011 16:48:29 -0600
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On 04/27/2011 04:37 PM, Bruno Haible wrote:
> Eric Blake wrote:
>>> +# On some hosts, mkstemp creates files with mode 0666, which is a security
>>> +# problem.
>> Also, it was valid in POSIX 2001, but violates POSIX 2008.
> What about mkstemps? Does it have the same problem as mkstemp?

In all my testing, I couldn't even find one of the "older platforms"
where mkstemp used 0666 instead of 0600 - HP-UX 10.20 has broken
mkstemp, but still had correct permissions.

mkstemps is a newer interface, not yet standardized in POSIX - any
platform new enough to implement it is already starting from a decent
mkstemp interface.

> The answer is fortunately "no". The platforms x symbols matrix shows that
> mkstemps() is defined on MacOS X, FreeBSD, OpenBSD, Solaris 11, and Cygwin 
> 1.7.

Which matches the fact that mkstemps is newer.

Eric Blake   address@hidden    +1-801-349-2682
Libvirt virtualization library http://libvirt.org

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