fs_config: introduce passwd generator am: 316f9462af am: 62d75469b1

am: 13be8e4305

Change-Id: I9a8681f10746bad905225f52d6774ace3799973c

tools/fs_config/Android.mk

@@ -105,7 +105,6 @@ LOCAL_GENERATED_SOURCES := $(oem) $(gen)
 
 my_fs_config_h := $(gen)
 my_gen_oem_aid := $(oem)
-system_android_filesystem_config :=
 gen :=
 oem :=
 endif
@@ -151,6 +150,25 @@ LOCAL_EXPORT_C_INCLUDE_DIRS := $(dir $(my_gen_oem_aid))
 LOCAL_EXPORT_C_INCLUDE_DEPS := $(my_gen_oem_aid)
 include $(BUILD_STATIC_LIBRARY)
 
+##################################
+# Generate the system/etc/passwd text file for the target
+# This file may be empty if no AIDs are defined in
+# TARGET_FS_CONFIG_GEN files.
+include $(CLEAR_VARS)
+
+LOCAL_MODULE := passwd
+LOCAL_MODULE_CLASS := ETC
+
+include $(BUILD_SYSTEM)/base_rules.mk
+
+$(LOCAL_BUILT_MODULE): PRIVATE_LOCAL_PATH := $(LOCAL_PATH)
+$(LOCAL_BUILT_MODULE): PRIVATE_TARGET_FS_CONFIG_GEN := $(TARGET_FS_CONFIG_GEN)
+$(LOCAL_BUILT_MODULE): PRIVATE_ANDROID_FS_HDR := $(system_android_filesystem_config)
+$(LOCAL_BUILT_MODULE): $(LOCAL_PATH)/fs_config_generator.py $(TARGET_FS_CONFIG_GEN) $(system_android_filesystem_config)
+	@mkdir -p $(dir $@)
+	$(hide) $< passwd --aid-header=$(PRIVATE_ANDROID_FS_HDR) $(PRIVATE_TARGET_FS_CONFIG_GEN) > $@
+
+system_android_filesystem_config :=
 endif
 
 ANDROID_FS_CONFIG_H :=

tools/fs_config/fs_config_generator.py

@@ -1153,6 +1153,79 @@ class OEMAidGen(BaseGenerator):
         print OEMAidGen._GENERIC_DEFINE % (aid.identifier, aid.value)
 
 
+@generator('passwd')
+class PasswdGen(BaseGenerator):
+    """Generates the /etc/passwd file per man (5) passwd."""
+
+    _GENERATED = ('#\n# THIS IS AN AUTOGENERATED FILE! DO NOT MODIFY!\n#')
+
+    _FILE_COMMENT = '# Defined in file: \"%s\"'
+
+    def __init__(self):
+
+        self._old_file = None
+
+    def add_opts(self, opt_group):
+
+        opt_group.add_argument(
+            'fsconfig', nargs='+', help='The list of fsconfig files to parse.')
+
+        opt_group.add_argument(
+            '--aid-header',
+            required=True,
+            help='An android_filesystem_config.h file'
+            'to parse AIDs and OEM Ranges from')
+
+    def __call__(self, args):
+
+        hdr_parser = AIDHeaderParser(args['aid_header'])
+
+        parser = FSConfigFileParser(args['fsconfig'], hdr_parser.oem_ranges)
+
+        aids = parser.aids
+
+        # nothing to do if no aids defined
+        if len(aids) == 0:
+            return
+
+        print PasswdGen._GENERATED
+
+        for aid in aids:
+            self._print_aid_passwd_line(aid)
+
+    def _print_aid_passwd_line(self, aid):
+        """
+        Prints the aid to stdout in the passwd format.
+        Internal use only.
+
+        Colon delimited:
+            login name, friendly name
+            encrypted password (optional)
+            uid (int)
+            gid (int)
+            User name or comment field
+            home directory
+            interpreter (optional)
+
+        Args:
+            aid (AID): The aid to print.
+        """
+        if self._old_file != aid.found:
+            self._old_file = aid.found
+            print PasswdGen._FILE_COMMENT % aid.found
+
+        logon = aid.friendly
+        uid = aid.normalized_value
+        if ':' in uid:
+            sys.exit('Cannot specify delimiter character ":" in uid: "%s"' %
+                     uid)
+        if ':' in logon:
+            sys.exit('Cannot specify delimiter character ":" in logon: "%s"' %
+                     logon)
+
+        print "%s::%s:%s::/:/system/bin/sh" % (logon, uid, uid)
+
+
 def main():
     """Main entry point for execution."""