When the hypervisor returns and error through the kernel or when simply when the kernel returns an error, the ioctl() call in userspace returns -1 with the error value in errno. This lib_xc was dropping this useful errno value by only returning the -1. This change continues to propagate the -errno value up the call chain. The impetus for this change was xc_domain_getinfo() previously it was not possible to distinguish the difference between an error and the domainID (or greater) not existing in the hypervisor. Now callers can compare the return value against -ESRCH to distinguish the difference between errors and the domain not existing. Signed-off-by: Josh Nicholas <jnicholas@virtualiron.com> Signed-off-by: Ben Guthro <bguthro@virtualiron.com> _______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com http://lists.xensource.com/xen-devel