3 # Copyright (C) 2009 The Android Open Source Project
5 # Licensed under the Apache License, Version 2.0 (the "License");
6 # you may not use this file except in compliance with the License.
7 # You may obtain a copy of the License at
9 # http://www.apache.org/licenses/LICENSE-2.0
11 # Unless required by applicable law or agreed to in writing, software
12 # distributed under the License is distributed on an "AS IS" BASIS,
13 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 # See the License for the specific language governing permissions and
15 # limitations under the License.
19 # Usage: post_process_props.py file.prop [blacklist_key, ...]
20 # Blacklisted keys are removed from the property file, if present
22 # See PROP_NAME_MAX and PROP_VALUE_MAX system_properties.h.
23 # The constants in system_properties.h includes the termination NUL,
24 # so we decrease the values by 1 here.
28 # Put the modifications that you need to make into the /system/build.prop into this
29 # function. The prop object has get(name) and put(name,value) methods.
30 def mangle_build_prop(prop):
33 # Put the modifications that you need to make into the /default.prop into this
34 # function. The prop object has get(name) and put(name,value) methods.
35 def mangle_default_prop(prop):
36 # If ro.debuggable is 1, then enable adb on USB by default
37 # (this is for userdebug builds)
38 if prop.get("ro.debuggable") == "1":
39 val = prop.get("persist.sys.usb.config")
44 prop.put("persist.sys.usb.config", val)
45 # UsbDeviceManager expects a value here. If it doesn't get it, it will
46 # default to "adb". That might not the right policy there, but it's better
48 if not prop.get("persist.sys.usb.config"):
49 prop.put("persist.sys.usb.config", "none");
52 """Validate the properties.
55 True if nothing is wrong.
58 buildprops = prop.to_dict()
59 for key, value in buildprops.iteritems():
60 # Check build properties' length.
61 if len(key) > PROP_NAME_MAX:
63 sys.stderr.write("error: %s cannot exceed %d bytes: " %
65 sys.stderr.write("%s (%d)\n" % (key, len(key)))
66 if len(value) > PROP_VALUE_MAX:
68 sys.stderr.write("error: %s cannot exceed %d bytes: " %
69 (key, PROP_VALUE_MAX))
70 sys.stderr.write("%s (%d)\n" % (value, len(value)))
75 def __init__(self, lines):
76 self.lines = [s.strip() for s in lines]
80 for line in self.lines:
81 if not line or line.startswith("#"):
84 key, value = line.split("=", 1)
90 for line in self.lines:
91 if line.startswith(key):
92 return line[len(key):]
95 def put(self, name, value):
97 for i in range(0,len(self.lines)):
98 if self.lines[i].startswith(key):
99 self.lines[i] = key + value
101 self.lines.append(key + value)
103 def delete(self, name):
105 self.lines = [ line for line in self.lines if not line.startswith(key) ]
108 f.write("\n".join(self.lines))
114 lines = f.readlines()
117 properties = PropFile(lines)
119 if filename.endswith("/build.prop"):
120 mangle_build_prop(properties)
121 elif filename.endswith("/default.prop"):
122 mangle_default_prop(properties)
124 sys.stderr.write("bad command line: " + str(argv) + "\n")
127 if not validate(properties):
130 # Drop any blacklisted keys
132 properties.delete(key)
134 f = open(filename, 'w+')
138 if __name__ == "__main__":