[notify] qemu/qemu-all: add udev rules for /dev/kvm

This change requires you to run the bundled pre-install script, that will a
new group 'kvm' with proper permissions for the /dev/kvm device, to allow
unprivileged users (members of the kvm group) to run kvm-accelerated qemu
instances.

Please note that this change prevents non-root and non-kvm members from using
/dev/kvm acceleration.

qemu-all/.footprint

@@ -1,6 +1,9 @@
 drwxr-xr-x	root/root	etc/
 drwxr-xr-x	root/root	etc/qemu/
 -rw-r--r--	root/root	etc/qemu/target-x86_64.conf (EMPTY)
+drwxr-xr-x	root/root	etc/udev/
+drwxr-xr-x	root/root	etc/udev/rules.d/
+-rw-r--r--	root/root	etc/udev/rules.d/60-kvm.rules
 drwxr-xr-x	root/root	usr/
 drwxr-xr-x	root/root	usr/bin/
 -rwxr-xr-x	root/root	usr/bin/qemu-aarch64

qemu-all/Pkgfile

@@ -3,7 +3,7 @@
 # Maintainer:  Thomas Penteker, tek at serverop dot de
 # Packager:    Lucas Hazel, lucas at die dot net dot au
 # Depends on:  libsdl
-# Nice to have: libseccomp libiscsi 
+# Nice to have: libseccomp libiscsi libusb usbredir
  
 name=qemu-all
 version=2.0.0
@@ -38,5 +38,9 @@ build() {
   install -D -m 644 qemu-img.1 $PKG/usr/man/man1/qemu-img.1
   install -D -m 644 qemu-nbd.8 $PKG/usr/man/man8/qemu-nbd.8
 
+  install -d $PKG/etc/udev/rules.d/
+  echo 'KERNEL=="kvm", NAME="kvm", OWNER="root", GROUP="kvm", MODE="0660"' > \
+  $PKG/etc/udev/rules.d/60-kvm.rules
+
   rm -rf $PKG/usr/share/locale
 }

qemu-all/pre-install

@@ -0,0 +1,2 @@
+#!/bin/sh
+getent group kvm || /usr/sbin/groupadd kvm

qemu/.footprint

@@ -1,6 +1,9 @@
 drwxr-xr-x	root/root	etc/
 drwxr-xr-x	root/root	etc/qemu/
 -rw-r--r--	root/root	etc/qemu/target-x86_64.conf (EMPTY)
+drwxr-xr-x	root/root	etc/udev/
+drwxr-xr-x	root/root	etc/udev/rules.d/
+-rw-r--r--	root/root	etc/udev/rules.d/60-kvm.rules
 drwxr-xr-x	root/root	usr/
 drwxr-xr-x	root/root	usr/bin/
 -rwxr-xr-x	root/root	usr/bin/qemu-ga

qemu/Pkgfile

@@ -39,5 +39,9 @@ build() {
   install -D -m 644 qemu-img.1 $PKG/usr/man/man1/qemu-img.1
   install -D -m 644 qemu-nbd.8 $PKG/usr/man/man8/qemu-nbd.8
 
+  install -d $PKG/etc/udev/rules.d/
+  echo 'KERNEL=="kvm", NAME="kvm", OWNER="root", GROUP="kvm", MODE="0660"' > \
+  $PKG/etc/udev/rules.d/60-kvm.rules
+
   rm -rf $PKG/usr/share/locale
 }

qemu/pre-install

@@ -0,0 +1,2 @@
+#!/bin/sh
+getent group kvm || /usr/sbin/groupadd kvm