Port to Alpine

Makefile

@@ -10,12 +10,14 @@ install:
 	install -Dm755 create_ap $(DESTDIR)$(BINDIR)/create_ap
 	install -Dm644 create_ap.conf $(DESTDIR)/etc/create_ap.conf
 	[ ! -d /lib/systemd/system ] || install -Dm644 create_ap.service $(DESTDIR)$(PREFIX)/lib/systemd/system/create_ap.service
+	[ ! -e /sbin/openrc-run ] || install -Dm755 create_ap.openrc $(DESTDIR)/etc/init.d/create_ap
 	install -Dm644 bash_completion $(DESTDIR)$(PREFIX)/share/bash-completion/completions/create_ap
 	install -Dm644 README.md $(DESTDIR)$(PREFIX)/share/doc/create_ap/README.md
 
 uninstall:
 	rm -f $(DESTDIR)$(BINDIR)/create_ap
 	rm -f $(DESTDIR)/etc/create_ap.conf
 	[ ! -f /lib/systemd/system/create_ap.service ] || rm -f $(DESTDIR)$(PREFIX)/lib/systemd/system/create_ap.service
+	[ ! -e /sbin/openrc-run ] || rm -f $(DESTDIR)/etc/init.d/create_ap
 	rm -f $(DESTDIR)$(PREFIX)/share/bash-completion/completions/create_ap
 	rm -f $(DESTDIR)$(PREFIX)/share/doc/create_ap/README.md

create_ap

@@ -62,6 +62,8 @@ usage() {
     echo "  --mac <MAC>             Set MAC address"
     echo "  --dhcp-dns <IP1[,IP2]>  Set DNS returned by DHCP"
     echo "  --daemon                Run create_ap in the background"
+    echo "  --pidfile <pidfile>     Save daemon PID to file"
+    echo "  --logfile <logfile>     Save daemon messages to file"
     echo "  --stop <id>             Send stop command to an already running create_ap. For an <id>"
     echo "                          you can put the PID of create_ap or the WiFi interface. You can"
     echo "                          get them with --list-running"
@@ -101,6 +103,17 @@ usage() {
     echo "  "$PROGNAME" --stop wlan0"
 }
 
+# Busybox polyfills
+if cp --help 2>&1 | grep -q -- --no-clobber; then
+    cp_n() {
+        cp -n "$@"
+    }
+else
+    cp_n() {
+        yes n | cp -i "$@"
+    }
+fi
+
 # on success it echos a non-zero unused FD
 # on error it echos 0
 get_avail_fd() {
@@ -628,6 +641,8 @@ COUNTRY=
 FREQ_BAND=2.4
 NEW_MACADDR=
 DAEMONIZE=0
+DAEMON_PIDFILE=
+DAEMON_LOGFILE=/dev/null
 NO_HAVEGED=0
 USE_PSK=0
 
@@ -636,7 +651,7 @@ REDIRECT_TO_LOCALHOST=0
 
 CONFIG_OPTS=(CHANNEL GATEWAY WPA_VERSION ETC_HOSTS DHCP_DNS NO_DNS NO_DNSMASQ HIDDEN MAC_FILTER MAC_FILTER_ACCEPT ISOLATE_CLIENTS
              SHARE_METHOD IEEE80211N IEEE80211AC HT_CAPAB VHT_CAPAB DRIVER NO_VIRT COUNTRY FREQ_BAND
-             NEW_MACADDR DAEMONIZE NO_HAVEGED WIFI_IFACE INTERNET_IFACE
+             NEW_MACADDR DAEMONIZE DAEMON_PIDFILE DAEMON_LOGFILE NO_HAVEGED WIFI_IFACE INTERNET_IFACE
              SSID PASSPHRASE USE_PSK)
 
 FIX_UNMANAGED=0
@@ -790,6 +805,10 @@ _cleanup() {
 
     mutex_unlock
     cleanup_lock
+
+    if [[ $RUNNING_AS_DAEMON -eq 1 && -n "$DAEMON_PIDFILE" && -f "$DAEMON_PIDFILE" ]]; then
+        rm $DAEMON_PIDFILE
+    fi
 }
 
 cleanup() {
@@ -1028,7 +1047,7 @@ for ((i=0; i<$#; i++)); do
     fi
 done
 
-GETOPT_ARGS=$(getopt -o hc:w:g:de:nm: -l "help","hidden","hostapd-debug:","redirect-to-localhost","mac-filter","mac-filter-accept:","isolate-clients","ieee80211n","ieee80211ac","ht_capab:","vht_capab:","driver:","no-virt","fix-unmanaged","country:","freq-band:","mac:","dhcp-dns:","daemon","stop:","list","list-running","list-clients:","version","psk","no-haveged","no-dns","no-dnsmasq","mkconfig:","config:" -n "$PROGNAME" -- "$@")
+GETOPT_ARGS=$(getopt -o hc:w:g:de:nm: -l "help","hidden","hostapd-debug:","redirect-to-localhost","mac-filter","mac-filter-accept:","isolate-clients","ieee80211n","ieee80211ac","ht_capab:","vht_capab:","driver:","no-virt","fix-unmanaged","country:","freq-band:","mac:","dhcp-dns:","daemon","pidfile:","logfile:","stop:","list","list-running","list-clients:","version","psk","no-haveged","no-dns","no-dnsmasq","mkconfig:","config:" -n "$PROGNAME" -- "$@")
 [[ $? -ne 0 ]] && exit 1
 eval set -- "$GETOPT_ARGS"
 
@@ -1148,6 +1167,16 @@ while :; do
             shift
             DAEMONIZE=1
             ;;
+        --pidfile)
+            shift
+            DAEMON_PIDFILE="$1"
+            shift
+            ;;
+        --logfile)
+            shift
+            DAEMON_LOGFILE="$1"
+            shift
+            ;;
         --stop)
             shift
             STOP_ID="$1"
@@ -1285,10 +1314,16 @@ if [[ $FIX_UNMANAGED -eq 1 ]]; then
 fi
 
 if [[ $DAEMONIZE -eq 1 && $RUNNING_AS_DAEMON -eq 0 ]]; then
-    echo "Running as Daemon..."
+    # Assume we're running underneath a service manager if PIDFILE is set
+    # and don't clobber it's output with a useless message
+    if [ -z "$DAEMON_PIDFILE" ]; then
+        echo "Running as Daemon..."
+    fi
     # run a detached create_ap
-    RUNNING_AS_DAEMON=1 setsid "$0" "${ARGS[@]}" &
+    RUNNING_AS_DAEMON=1 setsid "$0" "${ARGS[@]}" >>$DAEMON_LOGFILE 2>&1 &
     exit 0
+elif [[ $RUNNING_AS_DAEMON -eq 1 && -n "$DAEMON_PIDFILE" ]]; then
+    echo $$ >$DAEMON_PIDFILE
 fi
 
 if [[ $FREQ_BAND != 2.4 && $FREQ_BAND != 5 ]]; then
@@ -1494,12 +1529,12 @@ mkdir -p $COMMON_CONFDIR
 
 if [[ "$SHARE_METHOD" == "nat" ]]; then
     echo $INTERNET_IFACE > $CONFDIR/nat_internet_iface
-    cp -n /proc/sys/net/ipv4/conf/$INTERNET_IFACE/forwarding \
+    cp_n /proc/sys/net/ipv4/conf/$INTERNET_IFACE/forwarding \
        $COMMON_CONFDIR/${INTERNET_IFACE}_forwarding
 fi
-cp -n /proc/sys/net/ipv4/ip_forward $COMMON_CONFDIR
+cp_n /proc/sys/net/ipv4/ip_forward $COMMON_CONFDIR
 if [[ -e /proc/sys/net/bridge/bridge-nf-call-iptables ]]; then
-    cp -n /proc/sys/net/bridge/bridge-nf-call-iptables $COMMON_CONFDIR
+    cp_n /proc/sys/net/bridge/bridge-nf-call-iptables $COMMON_CONFDIR
 fi
 mutex_unlock
 
@@ -1757,7 +1792,7 @@ if [[ "$SHARE_METHOD" != "none" ]]; then
             ip link add name $BRIDGE_IFACE type bridge || die
             ip link set dev $BRIDGE_IFACE up || die
             # set 0ms forward delay
-            echo 0 > /sys/class/net/$BRIDGE_IFACE/bridge/forward_delay
+            echo -n 0 > /sys/class/net/$BRIDGE_IFACE/bridge/forward_delay
 
             # attach internet interface to bridge interface
             ip link set dev $INTERNET_IFACE promisc on || die

create_ap.openrc

@@ -0,0 +1,11 @@
+#!/sbin/openrc-run
+
+name=$RC_SVCNAME
+
+cfgfile=/etc/$RC_SVCNAME.conf
+pidfile=/run/$RC_SVCNAME.pid
+
+command=/usr/bin/create_ap
+command_args="--config $cfgfile"
+command_args_background="--daemon --pidfile $pidfile"
+stopsig=USR1