141 lines
4.0 KiB
Python
Executable File
141 lines
4.0 KiB
Python
Executable File
#!/usr/bin/env python
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#
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# Copyright (C) 2009 The Android Open Source Project
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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import sys
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# Usage: post_process_props.py file.prop [blacklist_key, ...]
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# Blacklisted keys are removed from the property file, if present
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# See PROP_NAME_MAX and PROP_VALUE_MAX system_properties.h.
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# The constants in system_properties.h includes the termination NUL,
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# so we decrease the values by 1 here.
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PROP_NAME_MAX = 31
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PROP_VALUE_MAX = 91
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# Put the modifications that you need to make into the /system/build.prop into this
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# function. The prop object has get(name) and put(name,value) methods.
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def mangle_build_prop(prop):
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pass
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# Put the modifications that you need to make into the /default.prop into this
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# function. The prop object has get(name) and put(name,value) methods.
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def mangle_default_prop(prop):
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# If ro.debuggable is 1, then enable adb on USB by default
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# (this is for userdebug builds)
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if prop.get("ro.debuggable") == "1":
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val = prop.get("persist.sys.usb.config")
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if "adb" not in val:
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if val == "":
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val = "adb"
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else:
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val = val + ",adb"
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prop.put("persist.sys.usb.config", val)
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# UsbDeviceManager expects a value here. If it doesn't get it, it will
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# default to "adb". That might not the right policy there, but it's better
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# to be explicit.
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if not prop.get("persist.sys.usb.config"):
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prop.put("persist.sys.usb.config", "none");
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def validate(prop):
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"""Validate the properties.
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Returns:
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True if nothing is wrong.
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"""
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check_pass = True
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buildprops = prop.to_dict()
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for key, value in buildprops.iteritems():
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# Check build properties' length.
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if len(key) > PROP_NAME_MAX:
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check_pass = False
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sys.stderr.write("error: %s cannot exceed %d bytes: " %
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(key, PROP_NAME_MAX))
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sys.stderr.write("%s (%d)\n" % (key, len(key)))
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if len(value) > PROP_VALUE_MAX:
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check_pass = False
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sys.stderr.write("error: %s cannot exceed %d bytes: " %
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(key, PROP_VALUE_MAX))
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sys.stderr.write("%s (%d)\n" % (value, len(value)))
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return check_pass
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class PropFile:
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def __init__(self, lines):
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self.lines = [s.strip() for s in lines]
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def to_dict(self):
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props = {}
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for line in self.lines:
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if not line or line.startswith("#"):
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continue
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if "=" in line:
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key, value = line.split("=", 1)
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props[key] = value
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return props
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def get(self, name):
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key = name + "="
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for line in self.lines:
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if line.startswith(key):
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return line[len(key):]
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return ""
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def put(self, name, value):
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key = name + "="
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for i in range(0,len(self.lines)):
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if self.lines[i].startswith(key):
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self.lines[i] = key + value
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return
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self.lines.append(key + value)
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def delete(self, name):
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key = name + "="
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self.lines = [ line for line in self.lines if not line.startswith(key) ]
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def write(self, f):
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f.write("\n".join(self.lines))
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f.write("\n")
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def main(argv):
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filename = argv[1]
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f = open(filename)
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lines = f.readlines()
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f.close()
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properties = PropFile(lines)
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if filename.endswith("/build.prop"):
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mangle_build_prop(properties)
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elif filename.endswith("/default.prop"):
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mangle_default_prop(properties)
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else:
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sys.stderr.write("bad command line: " + str(argv) + "\n")
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sys.exit(1)
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if not validate(properties):
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sys.exit(1)
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# Drop any blacklisted keys
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for key in argv[2:]:
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properties.delete(key)
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f = open(filename, 'w+')
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properties.write(f)
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f.close()
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if __name__ == "__main__":
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main(sys.argv)
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