proposal: add setresuid() system call to python

[travis+ml-python at subspacefield.org]

On Mon, Jul 20, 2009 at 04:10:35PM +0200, Hrvoje Niksic wrote:
> To emulate the os-module-type calls, it's better to raise exceptions
> than return negative values:
> 
> > def setresuid(ruid, euid, suid):
> >     return _setresuid(__uid_t(ruid), __uid_t(euid), __uid_t(suid))
> 
> def setresuid(ruid, euid, suid):
>     res = _setresuid(__uid_t(ruid), __uid_t(euid), __uid_t(suid))
>     if res < 0:
>         raise OSError('[Errno %d] %s' % (os.errno, errno.strerror(os.errno)))

I am working on a module to implement all of this, but that raise command
won't work in Python 2.6.1; it turns out that os.errno is a module, not
an integer.  Does anyone know how to do what I want (that is, how to access
the errno set in C functions)?
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