Add target to make a flashable su addon

Run 'make addonsu' to make a flashable zip to install the addon and
'make addonsu-remove' for a flashable zip that removes it.

Change-Id: I5b2fe67f98f2474b923c074dc6025b47c6db2ae0

4 files changed, 90 insertions, 0 deletions

diff --git a/addonsu/51-addonsu.sh b/addonsu/51-addonsu.sh
new file mode 100644
index 0000000..4e36c4c
--- /dev/null
+++ b/addonsu/51-addonsu.sh
@@ -0,0 +1,37 @@
+#!/sbin/sh
+
+. /tmp/backuptool.functions
+
+list_files() {
+cat <<EOF
+bin/su
+xbin/su
+EOF
+}
+
+case "$1" in
+  backup)
+    list_files | while read FILE DUMMY; do
+      backup_file $S/"$FILE"
+    done
+  ;;
+  restore)
+    list_files | while read FILE REPLACEMENT; do
+      R=""
+      [ -n "$REPLACEMENT" ] && R="$S/$REPLACEMENT"
+      [ -f "$C/$S/$FILE" -o -L "$C/$S/$FILE" ] && restore_file $S/"$FILE" "$R"
+    done
+  ;;
+  pre-backup)
+    # Stub
+  ;;
+  post-backup)
+    # Stub
+  ;;
+  pre-restore)
+    # Stub
+  ;;
+  post-restore)
+    # Stub
+  ;;
+esac
diff --git a/addonsu/mount-system.sh b/addonsu/mount-system.sh
new file mode 100644
index 0000000..2e209fb
--- /dev/null
+++ b/addonsu/mount-system.sh
@@ -0,0 +1,13 @@
+#!/sbin/sh
+
+if mount /system; then
+    exit 0
+fi
+
+# Try to get the block from /etc/recovery.fstab
+block=`cat /etc/recovery.fstab | cut -d '#' -f 1 | grep /system | grep -o '/dev/[^ ]*' | head -1`
+if [ -n "$block" ] && mount $block /system; then
+    exit 0
+fi
+
+exit 1
diff --git a/addonsu/updater-script-install b/addonsu/updater-script-install
new file mode 100644
index 0000000..762ddc5
--- /dev/null
+++ b/addonsu/updater-script-install
@@ -0,0 +1,21 @@
+ui_print("Installing su addon...");
+ifelse(is_mounted("/system"), unmount("/system"));
+package_extract_file("mount-system.sh", "/tmp/mount-system.sh");
+set_metadata("/tmp/mount-system.sh", "uid", 0, "gid", 0, "mode", 0755);
+run_program("/tmp/mount-system.sh") == 0 || abort("Could not mount /system");
+
+if getprop("ro.build.system_root_image") != "true" then
+  package_extract_dir("system", "/system");
+  set_metadata("/system/addon.d/51-addonsu.sh", "uid", 0, "gid", 0, "mode", 0755, "selabel", "u:object_r:system_file:s0");
+  set_metadata("/system/xbin/su", "uid", 0, "gid", 2000, "mode", 0755, "selabel", "u:object_r:su_exec:s0");
+  symlink("/system/xbin/su", "/system/bin/su");
+else
+  package_extract_dir("system", "/system/system");
+  set_metadata("/system/system/addon.d/51-addonsu.sh", "uid", 0, "gid", 0, "mode", 0755, "selabel", "u:object_r:system_file:s0");
+  set_metadata("/system/system/xbin/su", "uid", 0, "gid", 2000, "mode", 0755, "selabel", "u:object_r:su_exec:s0");
+  symlink("/system/xbin/su", "/system/system/bin/su");
+endif;
+
+unmount("/system");
+ui_print("Done");
+set_progress(1.000000);
diff --git a/addonsu/updater-script-remove b/addonsu/updater-script-remove
new file mode 100644
index 0000000..dab1df9
--- /dev/null
+++ b/addonsu/updater-script-remove
@@ -0,0 +1,19 @@
+ui_print("Removing su addon...");
+ifelse(is_mounted("/system"), unmount("/system"));
+package_extract_file("mount-system.sh", "/tmp/mount-system.sh");
+set_metadata("/tmp/mount-system.sh", "uid", 0, "gid", 0, "mode", 0755);
+run_program("/tmp/mount-system.sh") == 0 || abort("Could not mount /system");
+
+if getprop("ro.build.system_root_image") != "true" then
+  delete("/system/addon.d/51-addonsu.sh");
+  delete("/system/bin/su");
+  delete("/system/xbin/su");
+else
+  delete("/system/system/addon.d/51-addonsu.sh");
+  delete("/system/system/bin/su");
+  delete("/system/system/xbin/su");
+endif;
+
+unmount("/system");
+ui_print("Done");
+set_progress(1.000000);