Exported utility functions for RTC and system sleep

client/common_lib/sys_power.py

Index: client/common_lib/sys_power.py
diff --git a/client/common_lib/sys_power.py b/client/common_lib/sys_power.py
new file mode 100644
index 0000000000000000000000000000000000000000..3ddcfee237b217f93dfc04e85c0bd6a497f0222d
--- /dev/null
+++ b/client/common_lib/sys_power.py
@@ -0,0 +1,32 @@
+import os
+
+
+def set_state(state):
+    """
+    Set the system power state to 'state'.
+    """
+    file('/sys/power/state', 'w').write("%s\n" % state)
+
+
+def suspend_to_ram():
+    """
+    Suspend the system to RAM (S3)
+    """
+    if os.path.exists('/usr/bin/powerd_suspend'):
+        os.system('/usr/bin/powerd_suspend')
+    else:
+        set_power_state('mem')
+
+
+def suspend_to_disk():
+    """
+    Suspend the system to disk (S4)
+    """
+    set_power_state('disk')
+
+def standby():
+    """
+    Power-on suspend (S1)
+    """
+    set_power_state('standby')
+