From 7f9aac7a355a60dff40a9efc6c8a9467a070065f Mon Sep 17 00:00:00 2001
From: Silvan Calarco <silvan.calarco@mambasoft.it>
Date: Tue, 19 Nov 2013 10:59:44 +0100
Subject: [PATCH] network: rework android_usb support by using udev and avoid
 calling blocking systemctl for ttyG* but create symlinks

---
 Makefile                  |  9 ++++++++-
 postplug.d/20network      | 11 ++++++-----
 udev/76-android_usb.rules |  7 +++++++
 udev/android_usb          | 10 ++++++++++
 4 files changed, 31 insertions(+), 6 deletions(-)
 create mode 100644 udev/76-android_usb.rules
 create mode 100755 udev/android_usb

diff --git a/Makefile b/Makefile
index ff61ac7..d3daeba 100644
--- a/Makefile
+++ b/Makefile
@@ -94,6 +94,12 @@ install-plugins: $(pck_plugins)
 	      $(DESTDIR)$(postplugrcdir)/$$plugin;\
 	done
 
+install-udev-files:
+	@echo "installing udev files..."
+	@$(INSTALL_DIR) $(DESTDIR)/lib/udev/rules.d
+	$(INSTALL_SCRIPT) udev/android_usb $(DESTDIR)/lib/udev/android_usb
+	$(INSTALL_DATA) udev/76-android_usb.rules $(DESTDIR)/lib/udev/rules.d/76-android_usb.rules
+
 install-sysconfig: $(pck_sysconfig)
 	@$(INSTALL_DIR) $(DESTDIR)$(sysconfigdir)
 	$(INSTALL_DATA) $^ $(DESTDIR)$(sysconfigdir)
@@ -114,7 +120,8 @@ install: \
 	install-initscript \
 	install-logrotate  \
 	install-locales    \
-	install-sysconfig
+	install-sysconfig  \
+	install-udev-files
 
 uninstall:
 	rm -f $(DESTDIR)$(sbin)/$(PACKAGE)
diff --git a/postplug.d/20network b/postplug.d/20network
index aa1631b..2cf8f7e 100644
--- a/postplug.d/20network
+++ b/postplug.d/20network
@@ -106,8 +106,6 @@ function android_usb() {
       echo 0 > /sys/class/android_usb/android0/enable
       echo rndis,acm > /sys/class/android_usb/android0/functions
       echo 2 > /sys/class/android_usb/android0/f_acm/instances
-      systemctl enable getty@ttyGS0
-      systemctl enable getty@ttyGS1
       echo $ANDROID_ETHADDR > /sys/class/android_usb/android0/f_rndis/ethaddr
       echo 2d01 > /sys/class/android_usb/android0/idProduct
       echo 1 > /sys/class/android_usb/android0/enable
@@ -123,6 +121,7 @@ ONBOOT=yes
 NM_CONTROLLED=no
 _EOF
       }
+
       [ -e /etc/dhcpd-rndis0.conf ] || {
          [ "$NETWORK_ANDROID_SUBNET" ] && ANDROID_SUBNET=$NETWORK_ANDROID_SUBNET
          [ "$NETWORK_ANDROID_RANGE_FROM" ] && ANDORID_RANGE_FROM=$NETWORK_ANDROID_RANGE_FROM
@@ -134,9 +133,11 @@ subnet $ANDROID_SUBNET netmask $ANDROID_NETMASK {
 }
 _EOF
       }
-      ifup rndis0
-      touch /var/lib/dhcp/dhcpd-rndis0.leases
-      /sbin/dhcpd -q rndis0 -pf /run/dhcpd-rndis0.pid -cf /etc/dhcpd-rndis0.conf -lf /var/lib/dhcp/dhcpd-rndis0.leases
+
+      for d in ttyGS0 ttyGS1; do
+         [ -e /etc/systemd/system/getty.target.wants/getty@$d.service ] ||
+            ln -s /lib/systemd/system/getty@.service /etc/systemd/system/getty.target.wants/getty@$d.service
+      done
    fi
 }
 
diff --git a/udev/76-android_usb.rules b/udev/76-android_usb.rules
new file mode 100644
index 0000000..9196f7e
--- /dev/null
+++ b/udev/76-android_usb.rules
@@ -0,0 +1,7 @@
+# do not edit this file, it will be overwritten on update
+
+ACTION!="add|change", GOTO="android_usb_probe_end"
+
+SUBSYSTEM=="android_usb", KERNEL=="android*", IMPORT{program}="android_usb %p"
+
+LABEL="android_usb_probe_end"
diff --git a/udev/android_usb b/udev/android_usb
new file mode 100755
index 0000000..e007edd
--- /dev/null
+++ b/udev/android_usb
@@ -0,0 +1,10 @@
+#!/bin/bash
+# FIXME: hardcoded values
+if [ -e /sys$1 ]; then
+   ANDROID_STATE=`cat /sys$1/state`
+   [ "$ANDROID_STATE" = "CONFIGURED" ] || exit 0
+
+   ifup rndis0
+   touch /var/lib/dhcp/dhcpd-rndis0.leases
+   /sbin/dhcpd rndis0 -d -pf /run/dhcpd-rndis0.pid -cf /etc/dhcpd-rndis0.conf -lf /var/lib/dhcp/dhcpd-rndis0.leases
+fi