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_VALUE_MAX system_properties.h.
23 # PROP_VALUE_MAX in system_properties.h includes the termination NUL,
24 # so we decrease it by 1 here.
27 # Put the modifications that you need to make into the /system/build.prop into this
28 # function. The prop object has get(name) and put(name,value) methods.
29 def mangle_build_prop(prop):
32 # Put the modifications that you need to make into the /default.prop into this
33 # function. The prop object has get(name) and put(name,value) methods.
34 def mangle_default_prop(prop):
35 # If ro.debuggable is 1, then enable adb on USB by default
36 # (this is for userdebug builds)
37 if prop.get("ro.debuggable") == "1":
38 val = prop.get("persist.sys.usb.config")
43 prop.put("persist.sys.usb.config", val)
44 # UsbDeviceManager expects a value here. If it doesn't get it, it will
45 # default to "adb". That might not the right policy there, but it's better
47 if not prop.get("persist.sys.usb.config"):
48 prop.put("persist.sys.usb.config", "none");
51 """Validate the properties.
54 True if nothing is wrong.
57 buildprops = prop.to_dict()
58 dev_build = buildprops.get("ro.build.version.incremental",
60 for key, value in buildprops.iteritems():
61 # Check build properties' length.
62 if len(value) > PROP_VALUE_MAX:
63 # If dev build, show a warning message, otherwise fail the
64 # build with error message
66 sys.stderr.write("warning: %s exceeds %d bytes: " %
67 (key, PROP_VALUE_MAX))
68 sys.stderr.write("%s (%d)\n" % (value, len(value)))
69 sys.stderr.write("warning: This will cause the %s " % key)
70 sys.stderr.write("property return as empty at runtime\n")
73 sys.stderr.write("error: %s cannot exceed %d bytes: " %
74 (key, PROP_VALUE_MAX))
75 sys.stderr.write("%s (%d)\n" % (value, len(value)))
80 def __init__(self, lines):
81 self.lines = [s.strip() for s in lines]
85 for line in self.lines:
86 if not line or line.startswith("#"):
89 key, value = line.split("=", 1)
95 for line in self.lines:
96 if line.startswith(key):
97 return line[len(key):]
100 def put(self, name, value):
102 for i in range(0,len(self.lines)):
103 if self.lines[i].startswith(key):
104 self.lines[i] = key + value
106 self.lines.append(key + value)
108 def delete(self, name):
110 self.lines = [ line for line in self.lines if not line.startswith(key) ]
113 f.write("\n".join(self.lines))
119 lines = f.readlines()
122 properties = PropFile(lines)
124 if filename.endswith("/build.prop"):
125 mangle_build_prop(properties)
126 elif filename.endswith("/default.prop"):
127 mangle_default_prop(properties)
129 sys.stderr.write("bad command line: " + str(argv) + "\n")
132 if not validate(properties):
135 # Drop any blacklisted keys
137 properties.delete(key)
139 f = open(filename, 'w+')
143 if __name__ == "__main__":