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libvirt-guests: Add documentation and clean up to use virsh's improved list

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This patch adds documentation to functions defined in the libvirt-guests
init script and changes use of virsh's new commands to make the script
easier.
This commit is contained in:
Peter Krempa 2012-02-28 13:58:59 +01:00
parent 04dec5826d
commit 0d77f746ec
1 changed files with 40 additions and 20 deletions
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60
tools/libvirt-guests.init.sh
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@ -53,6 +53,9 @@ VAR_SUBSYS_LIBVIRT_GUESTS="$localstatedir"/lock/subsys/libvirt-guests
RETVAL=0
# retval COMMAND ARGUMENTS...
# run command with arguments and convert non-zero return value to 1 and set
# the global return variable
retval() {
"$@"
if [ $? -ne 0 ]; then
@ -63,6 +66,10 @@ retval() {
fi
}
# run_virsh URI ARGUMENTS...
# start virsh and let it execute ARGUMENTS on URI
# If URI is "default" virsh is called without the "-c" argument
# (using libvirt's default connection)
run_virsh() {
uri=$1
shift
@ -74,64 +81,67 @@ run_virsh() {
fi
}
# run_virsh_c URI ARGUMENTS
# Same as "run_virsh" but the "C" locale is used instead of
# the system's locale.
run_virsh_c() {
( export LC_ALL=C; run_virsh "$@" )
}
# list_guests URI PERSISTENT
# List running guests on URI.
# PERSISTENT argument options:
# --persistent: list only persistent guests
# --transient: list only transient guests
# [none]: list both persistent and transient guests
list_guests() {
uri=$1
persistent=$2
list=$(run_virsh_c "$uri" list)
list=$(run_virsh_c "$uri" list --uuid $persistent)
if [ $? -ne 0 ]; then
RETVAL=1
return 1
fi
uuids=
for id in $(echo "$list" | awk 'NR > 2 {print $1}'); do
uuid=$(run_virsh_c "$uri" dominfo "$id" | awk '/^UUID:/{print $2}')
if [ -z "$uuid" ]; then
RETVAL=1
return 1
fi
uuids="$uuids $uuid"
done
echo $uuids
echo $list
}
# guest_name URI UUID
# return name of guest UUID on URI
guest_name() {
uri=$1
uuid=$2
name=$(run_virsh_c "$uri" dominfo "$uuid" 2>/dev/null | \
sed -ne 's/^Name: *//p')
[ -n "$name" ] || name=$uuid
echo "$name"
run_virsh "$uri" domname "$uuid" 2>/dev/null
}
# guest_is_on URI UUID
# check if guest UUID on URI is running
# Result is returned by variable "guest_running"
guest_is_on() {
uri=$1
uuid=$2
guest_running=false
info=$(run_virsh_c "$uri" dominfo "$uuid")
id=$(run_virsh "$uri" domid "$uuid")
if [ $? -ne 0 ]; then
RETVAL=1
return 1
fi
id=$(echo "$info" | awk '/^Id:/{print $2}')
[ -n "$id" ] && [ "x$id" != x- ] && guest_running=true
return 0
}
# started
# Create the startup lock file
started() {
touch "$VAR_SUBSYS_LIBVIRT_GUESTS"
}
# start
# Start or resume the guests
start() {
[ -f "$LISTFILE" ] || { started; return 0; }
@ -187,6 +197,9 @@ start() {
started
}
# suspend_guest URI GUEST
# Do a managed save on a GUEST on URI. This function returns after the guest
# was saved.
suspend_guest()
{
uri=$1
@ -213,6 +226,9 @@ suspend_guest()
retval wait "$virsh_pid" && printf '\r%s%-12s\n' "$label" "$(gettext "done")"
}
# shutdown_guest URI GUEST
# Start a ACPI shutdown of GUEST on URI. This function return after the quest
# was successfully shutdown or the timeout defined by $SHUTDOWN_TIMEOUT expires.
shutdown_guest()
{
uri=$1
@ -241,6 +257,8 @@ shutdown_guest()
fi
}
# stop
# Shutdown or save guests on the configured uris
stop() {
# last stop was not followed by start
[ -f "$LISTFILE" ] && return 0
@ -304,6 +322,8 @@ stop() {
rm -f "$VAR_SUBSYS_LIBVIRT_GUESTS"
}
# gueststatus
# List status of guests
gueststatus() {
set -f
for uri in $URIS; do