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@xxxxxxxxxx +1-801-349-2682 Libvirt virtualization library http://libvirt.org
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