diff -r ed2b863f938f -r ebe549994431 kvmtool.sh
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/kvmtool.sh	Sat Aug 08 01:20:27 2009 +0200
@@ -0,0 +1,201 @@
+#! /bin/bash
+# $Id$
+# $URL$
+# status: in development
+# 2008 Heiko Schlittermann
+
+# Should be written in Perl!
+
+# Structure of virtual machine directories
+# $BASE     (see below, hard coded into this script)
+# |
+# +--<vm1>
+# |   +--conf
+# |   |     +--options
+# |   |     +--id
+# |   +--var
+# |   |     +--pid
+# |   |     +--running_options
+# |   +--<image1>
+# |   +-- ....
+# |   +--<imageN>
+# |
+# +--<vm2>             
+# | ....
+# +--<vmN>
+
+
+action="${1?}"; shift           # mandatory
+vm="$1"       ; shift           # optional
+
+# no user service able parts below
+
+PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
+unset ${!LC_*} LANG CDPATH
+
+ME=$(basename $0)
+BASE=/kvm
+KVM=$(command -v kvm)
+NC=$(command -v nc)
+FUSER=$(command -v fuser)
+VNCVIEWER=$(command -v vncviewer)
+TIMEOUT=30
+
+
+for f in "/etc/$ME.conf" ~/.$ME; do test -r "$f" && source "$f"; done
+
+
+die()       { echo $ME: "$@" >&2; exit 1; }
+warn()      { echo $ME: "$@" >&2; }
+silently()  { "$@" &>/dev/null; }
+
+debug()     { echo "DEBUG: $@" >&2; }
+
+unique_ids() {
+    local dups=$(cat $BASE/*/conf/id 2>/dev/null | sort -n | uniq -c \
+        | egrep -v '^[[:space:]]+1 ' | tr -s ' ' | cut -f2 -d:)
+    test "$dups" || return 0
+    ERR="$dups"  && return 1
+}
+
+convert_dirs() {
+    for dir in $BASE/*; do
+        test -d $dir/kvm || test -d $dir/conf || continue
+        local old=$dir/kvm
+        local new=$dir/conf
+        test -d $old && mv $old $new
+        test -f $new/cmdline && mv $new/cmdline $new/options
+    done
+}
+
+monitor() {
+    local port=$1;      shift
+    local command="$1"; shift
+
+    # check, if the monitor is available, kill if somebody
+    # else is using it
+    local client=$(netstat -tn | egrep ":$port[[:space:]]+EST" | tr -s ' ' | cut -f4 -d' ')
+    test "${client%:*}" = 127.0.0.1 && fuser -k ${client#*:}/tcp
+
+    local pid0 pid1
+    (
+        local a=$tmp/a.fifo; mkfifo $a
+        trap "rm -v $a" EXIT
+        exec 10<>$a
+        $NC localhost $port <&10 | {
+            read || exit       # banner
+            while read -d' '; do test "$REPLY" = "(qemu)" && break; done
+            echo "$command" >&10
+            while read -d' '; do test "$REPLY" = "(qemu)" && break; done
+        }
+    ) &  pid0=$!
+    ( sleep $TIMEOUT; kill $pid0 ) & pid1=$!
+    wait $pid0
+    silently kill $pid0 $pid1
+}
+
+### MAIN
+
+# sanity
+test -x "$NC"       || die "need nc (netcat)"
+test -x "$KVM"      || die "need kvm/qemu/kqemu"
+test -x "$FUSER"    || die "need fuser"
+test -d "$BASE"     || die "base dir $BASE does not exist"
+test -d "$BASE/$vm" || die "vm $vm does not exist"
+
+unique_ids          || die "duplicate ids (id: $ERR)"
+convert_dirs
+
+trap 'test "$TMP" && rm -fr $TMP' EXIT
+
+for vm in ${vm:-$(echo $BASE/*)}; do
+    vm=$(basename $vm)
+    conf=$BASE/$vm/conf
+    var=$BASE/$vm/var
+
+    tmp=$(mktemp -d)
+    TMP="$TMP $tmp"
+
+    test -d $conf           || continue
+    test -f $conf/id        || { warn "need id file (vm: $vm)" && continue; } 
+    test -f $conf/options   || { warn "need options file (vm: $vm)" && continue; }
+    test -d $var            || mkdir $var || exit 2
+
+    id=$(cat $conf/id)
+    port=$((4000 + id))
+    pid=$(cat $var/pid 2>/dev/null)
+
+    case "$action" in
+
+    start)
+        echo "starting $vm"
+        options="$(grep -v '^#' $conf/options) \
+        -pidfile var/pid \
+        -name "$vm" \
+        -vnc :$id \
+        -monitor tcp:localhost:$port,server,nowait \
+        $@"
+        options=$(echo "" $options)        # shorten it
+        echo "$options" > $var/running_options
+        test -f $var/frozen && options="$options $(cat $var/frozen)"
+
+        if silently fuser $var/pid; then
+            echo "running, pid: $pid, display :$id, monitor tcp:127.0.0.1:$port" 
+        else
+            ( cd $BASE/$vm && $KVM $options -daemonize )
+            pid=$(cat $var/pid 2>/dev/null)
+            test "$pid" || { warn "serious problem ($vm), no pid" && continue; }
+            echo "started, pid: $pid, display :$id, monitor tcp:127.0.0.1:$port" 
+        fi
+
+        test "$DISPLAY" && test "$VNCVIEWER" && test -t \
+        && ( silently exec $VNCVIEWER :$id </dev/null & )
+
+        ;;
+    stop)   
+        {
+        echo "stopping (powerdown) $vm"
+        monitor $port "system_powerdown"
+        silently fuser $var/pid && $0 quit $vm
+        } &
+        ;;
+    quit) 
+        {
+        echo "quit $vm"
+        monitor $port "quit"
+        silently fuser $var/pid && $0 kill $vm
+        } &
+        ;;
+    kill)   
+        echo "killing $vm"
+        kill $pid 
+        ;;
+    freeze) 
+        {
+        echo "freezing $vm"
+        monitor $port "savevm HIBERNATED"
+        monitor $port "quit" 
+        echo "-loadvm HIBERNATED" >$var/frozen
+        } &
+        ;;
+    qemu)
+        echo "DO *NOT* USE \"quit\", use ^C for exiting!"
+        $NC localhost $port
+        ;;
+
+    list)
+        echo "$vm:" $(silently fuser $var/pid \
+            && echo "running (pid: $pid)" \
+            || echo "not running")
+        ;;
+
+    *)  die "unknown command \"$action\""
+        ;;
+
+    esac
+
+done
+
+wait
+
+# vim:ts=4 sw=4 et: