fs_config: introduce TARGET_FS_CONFIG_GEN
Introduce TARGET_FS_CONFIG_GEN, an option for generating
android_filesystem_config.h files from multiple intermediate
file formats. See the README for more details.
Change-Id: Ibdb2f65702657802e34b0cec18fb43709d7452bb
Signed-off-by: William Roberts <william.c.roberts@intel.com>
diff --git a/tools/fs_config/fs_config_generator.py b/tools/fs_config/fs_config_generator.py
new file mode 100755
index 0000000..e66e295
--- /dev/null
+++ b/tools/fs_config/fs_config_generator.py
@@ -0,0 +1,277 @@
+#!/usr/bin/env python
+
+import ConfigParser
+import re
+import sys
+
+
+GENERATED = '''
+/*
+ * THIS IS AN AUTOGENERATED FILE! DO NOT MODIFY
+ */
+'''
+
+INCLUDE = '#include <private/android_filesystem_config.h>'
+
+DEFINE_NO_DIRS = '#define NO_ANDROID_FILESYSTEM_CONFIG_DEVICE_DIRS\n'
+DEFINE_NO_FILES = '#define NO_ANDROID_FILESYSTEM_CONFIG_DEVICE_FILES\n'
+
+DEFAULT_WARNING = '#warning No device-supplied android_filesystem_config.h, using empty default.'
+
+NO_ANDROID_FILESYSTEM_CONFIG_DEVICE_DIRS_ENTRY = '{ 00000, AID_ROOT, AID_ROOT, 0, "system/etc/fs_config_dirs" },'
+NO_ANDROID_FILESYSTEM_CONFIG_DEVICE_FILES_ENTRY = '{ 00000, AID_ROOT, AID_ROOT, 0, "system/etc/fs_config_files" },'
+
+IFDEF_ANDROID_FILESYSTEM_CONFIG_DEVICE_DIRS = '#ifdef NO_ANDROID_FILESYSTEM_CONFIG_DEVICE_DIRS'
+ENDIF = '#endif'
+
+OPEN_FILE_STRUCT = 'static const struct fs_path_config android_device_files[] = {'
+OPEN_DIR_STRUCT = 'static const struct fs_path_config android_device_dirs[] = {'
+CLOSE_FILE_STRUCT = '};'
+
+GENERIC_DEFINE = "#define %s\t%s"
+
+FILE_COMMENT = '// Defined in file: \"%s\"'
+
+# from system/core/include/private/android_filesystem_config.h
+AID_OEM_RESERVED_START = 2900
+AID_OEM_RESERVED_END = 2999
+
+
+AID_MATCH = re.compile('AID_[a-zA-Z]+')
+
+def handle_aid(file_name, section_name, config, aids, seen_aids):
+ value = config.get(section_name, 'value')
+
+ errmsg = '%s for: \"' + section_name + '" file: \"' + file_name + '\"'
+
+ if not value:
+ raise Exception(errmsg % 'Found specified but unset "value"')
+
+ v = convert_int(value)
+ if not v:
+ raise Exception(errmsg % ('Invalid "value", not a number, got: \"%s\"' % value))
+
+ # Values must be within OEM range
+ if (v < AID_OEM_RESERVED_START) or (v > AID_OEM_RESERVED_END):
+ s = '"value" not in valid range %d - %d, got: %s'
+ s = s % (AID_OEM_RESERVED_START, AID_OEM_RESERVED_END, value)
+ raise Exception(errmsg % s)
+
+ # use the normalized int value in the dict and detect
+ # duplicate definitions of the same vallue
+ v = str(v)
+ if v in seen_aids[1]:
+ # map of value to aid name
+ a = seen_aids[1][v]
+
+ # aid name to file
+ f = seen_aids[0][a]
+
+ s = 'Duplicate AID value "%s" found on AID: "%s".' % (value, seen_aids[1][v])
+ s += ' Previous found in file: "%s."' % f
+ raise Exception(errmsg % s)
+
+ seen_aids[1][v] = section_name
+
+ # Append a tuple of (AID_*, base10(value), str(value))
+ # We keep the str version of value so we can print that out in the
+ # generated header so investigating parties can identify parts.
+ # We store the base10 value for sorting, so everything is ascending
+ # later.
+ aids.append((file_name, section_name, v, value))
+
+def convert_int(num):
+
+ try:
+ if num.startswith('0x'):
+ return int(num, 16)
+ elif num.startswith('0b'):
+ return int(num, 2)
+ elif num.startswith('0'):
+ return int(num, 8)
+ else:
+ return int(num, 10)
+ except ValueError:
+ pass
+ return None
+
+def handle_path(file_name, section_name, config, files, dirs):
+
+ mode = config.get(section_name, 'mode')
+ user = config.get(section_name, 'user')
+ group = config.get(section_name, 'group')
+ caps = config.get(section_name, 'caps')
+
+ errmsg = 'Found specified but unset option: \"%s" in file: \"' + file_name + '\"'
+
+ if not mode:
+ raise Exception(errmsg % 'mode')
+
+ if not user:
+ raise Exception(errmsg % 'user')
+
+ if not group:
+ raise Exception(errmsg % 'group')
+
+ if not caps:
+ raise Exception(errmsg % 'caps')
+
+ caps = caps.split()
+
+ tmp = []
+ for x in caps:
+ if convert_int(x):
+ tmp.append('(' + x + ')')
+ else:
+ tmp.append('(1ULL << CAP_' + x.upper() + ')')
+
+ caps = tmp
+
+ path = '"' + section_name + '"'
+
+ if len(mode) == 3:
+ mode = '0' + mode
+
+ try:
+ int(mode, 8)
+ except:
+ raise Exception('Mode must be octal characters, got: "' + mode + '"')
+
+ if len(mode) != 4:
+ raise Exception('Mode must be 3 or 4 characters, got: "' + mode + '"')
+
+
+ caps = '|'.join(caps)
+
+ x = [ mode, user, group, caps, section_name ]
+ if section_name[-1] == '/':
+ dirs.append((file_name, x))
+ else:
+ files.append((file_name, x))
+
+def handle_dup(name, file_name, section_name, seen):
+ if section_name in seen:
+ dups = '"' + seen[section_name] + '" and '
+ dups += file_name
+ raise Exception('Duplicate ' + name + ' "' + section_name + '" found in files: ' + dups)
+
+def parse(file_name, files, dirs, aids, seen_paths, seen_aids):
+
+ config = ConfigParser.ConfigParser()
+ config.read(file_name)
+
+ for s in config.sections():
+
+ if AID_MATCH.match(s) and config.has_option(s, 'value'):
+ handle_dup('AID', file_name, s, seen_aids[0])
+ seen_aids[0][s] = file_name
+ handle_aid(file_name, s, config, aids, seen_aids)
+ else:
+ handle_dup('path', file_name, s, seen_paths)
+ seen_paths[s] = file_name
+ handle_path(file_name, s, config, files, dirs)
+
+def generate(files, dirs, aids):
+ print GENERATED
+ print INCLUDE
+ print
+
+ are_dirs = len(dirs) > 0
+ are_files = len(files) > 0
+ are_aids = len(aids) > 0
+
+ if are_aids:
+ # sort on value of (file_name, name, value, strvalue)
+ aids.sort(key=lambda x: x[2])
+ for a in aids:
+ # use the preserved str value
+ print FILE_COMMENT % a[0]
+ print GENERIC_DEFINE % (a[1], a[2])
+
+ print
+
+ if not are_dirs:
+ print DEFINE_NO_DIRS
+
+ if not are_files:
+ print DEFINE_NO_FILES
+
+ if not are_files and not are_dirs and not are_aids:
+ print DEFAULT_WARNING
+ return
+
+ if are_files:
+ print OPEN_FILE_STRUCT
+ for tup in files:
+ f = tup[0]
+ c = tup[1]
+ c[4] = '"' + c[4] + '"'
+ c = '{ ' + ' ,'.join(c) + ' },'
+ print FILE_COMMENT % f
+ print ' ' + c
+
+ if not are_dirs:
+ print IFDEF_ANDROID_FILESYSTEM_CONFIG_DEVICE_DIRS
+ print ' ' + NO_ANDROID_FILESYSTEM_CONFIG_DEVICE_DIRS_ENTRY
+ print ENDIF
+ print CLOSE_FILE_STRUCT
+
+ if are_dirs:
+ print OPEN_DIR_STRUCT
+ for d in dirs:
+ f[4] = '"' + f[4] + '"'
+ d = '{ ' + ' ,'.join(d) + ' },'
+ print ' ' + d
+
+ print CLOSE_FILE_STRUCT
+
+def file_key(x):
+
+ # Wrapper class for custom prefix matching strings
+ class S(object):
+ def __init__(self, str):
+
+ self.orig = str
+ self.is_prefix = str[-1] == '*'
+ if self.is_prefix:
+ self.str = str[:-1]
+ else:
+ self.str = str
+
+ def __lt__(self, other):
+
+ # if were both suffixed the smallest string
+ # is 'bigger'
+ if self.is_prefix and other.is_prefix:
+ b = len(self.str) > len(other.str)
+ # If I am an the suffix match, im bigger
+ elif self.is_prefix:
+ b = False
+ # If other is the suffix match, he's bigger
+ elif other.is_prefix:
+ b = True
+ # Alphabetical
+ else:
+ b = self.str < other.str
+ return b
+
+ return S(x[4])
+
+def main():
+
+ files = []
+ dirs = []
+ aids = []
+ seen_paths = {}
+
+ # (name to file, value to aid)
+ seen_aids = ({}, {})
+
+ for x in sys.argv[1:]:
+ parse(x, files, dirs, aids, seen_paths, seen_aids)
+
+ files.sort(key= lambda x: file_key(x[1]))
+ generate(files, dirs, aids)
+
+if __name__ == '__main__':
+ main()