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|
#! /bin/bash
. /usr/lib/network/globals
usage() {
cat << END
Usage: netctl {COMMAND} [PROFILE]
[--help|--version]
Commands:
list List available profiles
store Save which profiles are active
restore Load saved profiles
stop-all Stops all profiles
start [PROFILE] Start a profile
stop [PROFILE] Stop a profile
restart [PROFILE] Restart a profile
switch-to [PROFILE] Switch to a profile
status [PROFILE] Show runtime status of a profile
enable [PROFILE] Enable the systemd unit for a profile
disable [PROFILE] Disable the systemd unit for a profile
is-enabled [PROFILE] Check whether a profile is enabled
reenable [PROFILE] Reenable the systemd unit for a profile
END
}
sd_booted() {
[[ -d /run/systemd/system ]]
}
sd_escape() {
local IFS=''
# Prevent a recursion loop on backspaces
set -- "${@//\\/\\x5c}"
while [[ "$*" =~ [^[:alnum:].:_/\\] ]]; do
set -- "${@//$BASH_REMATCH/$(printf '\\x%x' "'$BASH_REMATCH")}"
done
printf '%s\n' "${@//\//-}"
}
# Wrapper around systemctl to convert profile names to unit names
sd_call() {
local command=$1
shift
set -- $(sd_escape "$@")
systemctl $command $(printf 'netctl@%s.service\n' "$@")
}
list() {
local indicators=( '*' ' ' )
list_profiles | while read -r Profile; do
sd_call "is-active --quiet" "$Profile" &> /dev/null
# Make the return value boolean
printf '%s %s\n' "${indicators[!! $?]}" "$Profile"
done
}
store() {
mkdir -p "$(dirname "$STATE_FILE")"
list_profiles | while read -r Profile; do
if sd_call "is-active --quiet" "$Profile" &> /dev/null; then
printf "%s\n" "$Profile"
fi
done > "$STATE_FILE"
}
restore() {
if [[ ! -r $STATE_FILE ]]; then
exit_error "Could not read state file '$STATE_FILE'"
elif [[ ! -s $STATE_FILE ]]; then
report_debug "No profiles to restore in state file '$STATE_FILE'"
else
mapfile -t Profiles < "$STATE_FILE"
do_debug sd_call start "${Profiles[@]}"
fi
}
stop_all() {
# We cannot pipe to mapfile, as the end of a pipe is inside a subshell
mapfile -t Profiles < <(list_profiles)
[[ $Profiles ]] && do_debug sd_call stop "${Profiles[@]}" 2> \
>(grep -Fv "not loaded" >&2)
}
switch_to() {
cd "$PROFILE_DIR"
if [[ ! -r $1 ]]; then
exit_error "Profile '$1' does not exist or is not readable"
fi
# We assume interface names are not quoted
# Using read removes leading whitespace
read InterfaceLine < \
<(grep -om1 "^[[:space:]]*Interface=[[:alnum:]:._-]\+" "$1")
if [[ -z $InterfaceLine ]]; then
exit_error "Profile '$1' does not specify an interface"
fi
mapfile -t AllProfiles < <(list_profiles)
mapfile -t Profiles < <(grep -Fl "$InterfaceLine" "${AllProfiles[@]}")
[[ $Profiles ]] && do_debug sd_call stop "${Profiles[@]}" 2> \
>(grep -Fv "not loaded" >&2)
do_debug sd_call start "$1"
}
unit_enable() {
local unit="@systemdsystemconfdir@/netctl@$(sd_escape "$1").service"
if [[ -e $unit ]]; then
report_error "A unit file for profile '$1' already exists"
return 1
fi
load_profile "$1"
do_readable touch "$unit"
echo ".include @systemdsystemunitdir@/netctl@.service" > "$unit"
echo -e "\n[Unit]" >> "$unit"
[[ -n $Description ]] && echo "Description=$Description" >> "$unit"
declare -p BindsToInterfaces &> /dev/null || BindsToInterfaces=$Interface
if (( ${#BindsToInterfaces[@]} )); then
: ${InterfaceRoot=sys/subsystem/net/devices/}
printf "BindsTo=$(sd_escape "$InterfaceRoot")%s.device\n" \
$(sd_escape "${BindsToInterfaces[@]}") >> "$unit"
printf "After=$(sd_escape "$InterfaceRoot")%s.device\n" \
$(sd_escape "${BindsToInterfaces[@]}") >> "$unit"
fi
if (( ${#After[@]} )); then
printf 'After="netctl@%s.service"\n' \
$(sd_escape "${After[@]}") >> "$unit"
fi
mkdir -p "@systemdsystemconfdir@/multi-user.target.wants"
echo "ln -s '$unit' '${unit/system\//system/multi-user.target.wants/}'"
ln -s "$unit" "${unit/system\//system/multi-user.target.wants/}"
}
unit_disable() {
local unit="@systemdsystemconfdir@/netctl@$(sd_escape "$1").service"
if sd_call "is-enabled --quiet" "$1" &> /dev/null; then
sd_call disable "$1"
fi
if [[ ! -f $unit ]]; then
report_error "No regular unit file found for profile '$1'"
return 1
fi
do_debug rm "$unit"
}
case $# in
1)
case $1 in
--version)
report_notice "netctl version $NETCTL_VERSION";;
--help)
usage;;
list)
list;;
store|restore)
ensure_root "$(basename "$0")"
"$1";;
stop-all)
stop_all;;
*)
exit_error "$(usage)";;
esac;;
2)
case $1 in
start|stop|restart|status|is-enabled)
sd_call "$1" "$2";;
switch-to)
ensure_root "$(basename "$0")"
switch_to "$2";;
enable|disable)
ensure_root "$(basename "$0")"
"unit_$1" "$2"
if sd_booted; then
systemctl daemon-reload
fi;;
reenable)
ensure_root "$(basename "$0")"
unit_disable "$2"
unit_enable "$2"
if sd_booted; then
systemctl daemon-reload
fi;;
*)
exit_error "$(usage)";;
esac;;
*)
exit_error "$(usage)";;
esac
# vim: ft=sh ts=4 et sw=4:
|
