xen: Don't emit warning message if /proc/xen/capabilities file does not exist.

[virt-what.git] / virt-what.in

diff --git a/virt-what.in b/virt-what.in
index d50426a..4b6d3b8 100644 (file)
--- a/virt-what.in
+++ b/virt-what.in
@@ -26,10 +26,15 @@
 # The following resources were useful in writing this script:
 # . http://www.dmo.ca/blog/20080530151107
 
+# Do not allow unset variables, and set defaults.
+set -u
+root=''
+skip_qemu_kvm=false
+
 VERSION="@VERSION@"
 
 function fail {
-    echo "virt-what: $1"
+    echo "virt-what: $1" >&2
     exit 1
 }
 
@@ -55,7 +60,7 @@ while true; do
             root="$2"
             shift 2
             ;;
-       -v|--version) echo $VERSION; exit 0 ;;
+       -v|--version) echo "$VERSION"; exit 0 ;;
        --) shift; break ;;
        *) fail "internal error ($1)" ;;
     esac
@@ -66,12 +71,11 @@ done
 # Add /usr/libexec to the path so we can find the helper binary.
 prefix=@prefix@
 exec_prefix=@exec_prefix@
-PATH=$root@libexecdir@:$root/sbin:$root/usr/sbin:$PATH
+PATH="${root}@libexecdir@:${root}/sbin:${root}/usr/sbin:${PATH}"
 
 # Check we're running as root.
 
-uid=`id -u`
-if [ "$uid" != 0 ]; then
+if [ "x$root" = "x" ] && [ "$EUID" -ne 0 ]; then
     fail "this script must be run as root"
 fi
 
@@ -127,39 +131,53 @@ fi
 # container)
 # /proc/bc - exists on node, but not inside container.
 
-if [ -d $root/proc/vz -a ! -d $root/proc/bc ]; then
+if [ -d "${root}/proc/vz" -a ! -d "${root}/proc/bc" ]; then
     echo openvz
 fi
 
+# Check for LXC containers
+# http://www.freedesktop.org/wiki/Software/systemd/ContainerInterface
+# Added by Marc Fournier
+
+if [ -e "${root}/proc/1/environ" ] &&
+    cat "${root}/proc/1/environ" | tr '\000' '\n' | grep -Eiq '^container='; then
+    echo lxc
+fi
+
 # Check for Linux-VServer
-if cat $root/proc/self/status | grep -q "VxID: [0-9]*"; then
+if cat "${root}/proc/self/status" | grep -q "VxID: [0-9]*"; then
     echo linux_vserver
+    if grep -q "VxID: 0$" "${root}/proc/self/status"; then
+        echo linux_vserver-host
+    else
+        echo linux_vserver-guest
+    fi
 fi
 
 # Check for UML.
 # Added by Laurent Léonard.
-if grep -q 'UML' $root/proc/cpuinfo; then
+if grep -q 'UML' "${root}/proc/cpuinfo"; then
     echo uml
 fi
 
 # Check for IBM PowerVM Lx86 Linux/x86 emulator.
-if grep -q '^vendor_id.*PowerVM Lx86' $root/proc/cpuinfo; then
+if grep -q '^vendor_id.*PowerVM Lx86' "${root}/proc/cpuinfo"; then
     echo powervm_lx86
 fi
 
 # Check for Hitachi Virtualization Manager (HVM) Virtage logical partitioning.
 if echo "$dmi" | grep -q 'Manufacturer.*HITACHI' &&
-   echo "$dmi" | grep -q 'Product.*HVM LPAR'; then
+   echo "$dmi" | grep -q 'Product.* LPAR'; then
     echo virtage
 fi
 
 # Check for IBM SystemZ.
-if grep -q '^vendor_id.*IBM/S390' $root/proc/cpuinfo; then
+if grep -q '^vendor_id.*IBM/S390' "${root}/proc/cpuinfo"; then
     echo ibm_systemz
-    if [ -f $root/proc/sysinfo ]; then
-        if grep -q 'VM.*Control Program.*z/VM' $root/proc/sysinfo; then
+    if [ -f "${root}/proc/sysinfo" ]; then
+        if grep -q 'VM.*Control Program.*z/VM' "${root}/proc/sysinfo"; then
             echo ibm_systemz-zvm
-        elif grep -q '^LPAR' $root/proc/sysinfo; then
+        elif grep -q '^LPAR' "${root}/proc/sysinfo"; then
             echo ibm_systemz-lpar
         else
             # This is unlikely to be correct.
@@ -171,30 +189,30 @@ fi
 # Check for Parallels.
 if echo "$dmi" | grep -q 'Vendor: Parallels'; then
     echo parallels
-    skip_qemu_kvm=1
+    skip_qemu_kvm=true
 fi
 
 # Check for Xen.
 
 if [ "$cpuid" = "XenVMMXenVMM" ]; then
     echo xen; echo xen-hvm
-    skip_qemu_kvm=1
-elif [ -f $root/proc/xen/capabilities ]; then
+    skip_qemu_kvm=true
+elif [ -d "${root}/proc/xen" ]; then
     echo xen
-    if grep -q "control_d" $root/proc/xen/capabilities; then
+    if grep -q "control_d" "${root}/proc/xen/capabilities" 2>/dev/null; then
         echo xen-dom0
     else
         echo xen-domU
     fi
-    skip_qemu_kvm=1
-elif [ -f $root/sys/hypervisor/type ] &&
-    grep -q "xen" $root/sys/hypervisor/type; then
+    skip_qemu_kvm=true
+elif [ -f "${root}/sys/hypervisor/type" ] &&
+    grep -q "xen" "${root}/sys/hypervisor/type"; then
     # Ordinary kernel with pv_ops.  There does not seem to be
     # enough information at present to tell whether this is dom0
     # or domU.  XXX
     echo xen
 elif [ "$arch" = "ia64" ]; then
-    if [ -d $root/sys/bus/xen -a ! -d $root/sys/bus/xen-backend ]; then
+    if [ -d "${root}/sys/bus/xen" -a ! -d "${root}/sys/bus/xen-backend" ]; then
         # PV-on-HVM drivers installed in a Xen guest.
         echo xen
         echo xen-hvm
@@ -217,7 +235,7 @@ fi
 # seen that it's Parallels.  Xen uses QEMU as the device model, so
 # skip this test if we know it is Xen.
 
-if [ ! "$skip_qemu_kvm" ]; then
+if ! "$skip_qemu_kvm"; then
     if [ "$cpuid" = "KVMKVMKVM" ]; then
        echo kvm
     else
@@ -225,7 +243,7 @@ if [ ! "$skip_qemu_kvm" ]; then
         # option, since /proc/cpuinfo will not contain the QEMU
         # string.  The long term fix for this would be to export
         # another CPUID leaf for non-accelerated qemu.
-        if grep -q 'QEMU' $root/proc/cpuinfo; then
+        if grep -q 'QEMU' "${root}/proc/cpuinfo"; then
            echo qemu
        fi
     fi