[libvirt] FreeBSD and sysconf(_SC_GETPW_R_SIZE_MAX)

[Eric Blake]

On 05/16/2011 03:03 PM, Eric Blake wrote:
>> getpwnam() returns ERANGE if the allocated buffer is too small. So
>> we should do something along the lines of
>>
>>     size_t len = sysconf(_SC_GETPW_R_SIZE_MAX)
> 
> Guarded by #ifdef, and defaulting to -1 if _SC_GETPW_R_SIZE_MAX is not
> defined (since it is a handy extension, but not present everywhere).

Or not - we only use it inside #if HAVE_FUNC_GETPWNAM_R and friends; so
far, all platforms that have the *_r functions also happen to have a
decent set of sysconf() names where we aren't running into compilation
errors by trying to use _SC_GETPW_R_SIZE_MAX.

> But indeed this is the correct response.

I've posted
https://www.redhat.com/archives/libvir-list/2011-May/msg01074.html

-- 
Eric Blake   eblake at redhat.com    +1-801-349-2682
Libvirt virtualization library http://libvirt.org

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