Re: [libvirt] [PATCH v2 11/19] util: Introduce libvirt_udevhelper

This is a small helper intended to be run by udev. On its input (either as the only command line argument or in DEVNODE environment vairable) it is given a device and on the output it will either put nothing (meaning the device is not used by any of the libvirt domains), or it will print out security labels in the following form: UID GID SELABEL Signed-off-by: Michal Privoznik <mprivozn(a)redhat.com&gt; --- libvirt.spec.in | 1 + mingw-libvirt.spec.in | 2 + po/POTFILES.in | 1 + src/Makefile.am | 20 ++++++++ src/util/udevhelper.c | 137 ++++++++++++++++++++++++++++++++++++++++++++++++++ 5 files changed, 161 insertions(+) create mode 100644 src/util/udevhelper.c

+static int +printLabels(const char *device) +{ + char *filename = NULL; + virUdevMgrPtr mgr = NULL; + int ret = -1; + virSecurityDeviceLabelDefPtr *labels = NULL; + size_t i, nlabels = 0; + const char *dacLabel = NULL; + const char *seLabel = NULL; + + if (virAsprintf(&filename, + "%s/run/libvirt/qemu/devices.udev", LOCALSTATEDIR) < 0) + goto cleanup; + + if (!(mgr = virUdevMgrNewFromFile(filename))) + goto cleanup; + + if (virUdevMgrLookupLabels(mgr, device, &labels, &nlabels) < 0) + goto cleanup;