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Re: [Xen-devel] [PATCH] libxen-3.0 (libxc rewrite)

Christian Limpach wrote:

You're right. Some of the interfaces are a little awkward (especially the memory mapping ones). It seemed like a reasonable trade-off to make though.

What about perror, warn, err and the likes, I really like to use those.
It seems very illogical having to stick the returned value into errno to be
able to use those...
You're not going to like this answer but I don't think I would use any of those functions in a real management application. Management tools should be using standard logging suites (like syslog).

strerror() still works with these return codes btw. My test code usually likes like this:

domid_t domid;
int ret = dom_create_domain(3000, 0, &domid);

if (ret < 0) error("dom_create_domain: failed %s", strerror(-ret));

This would be even easier if the library returned errno instead of -errno ;-)

Anthony Liguori

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