Android mobile workflow: init. c startup notebook

After Android kernel upload is triggered, the init initialization line will be performed, and the agent will be in system/CORE/init. -Producer creates/dev,/proc,/sys object metadata, producer creates/dev/PTS object metadata (producer metadata) and/dev/socket, in addition, the Mount-pilot command creates a null setting point, the command creates a kmsg setting point, and the log-parsing init is initialized. RC-kernel is automatically saved in/proc/kernel line:-qemu-androidboot. console-androidboot. mode-factory-factory2-androidboot. serialno-androidboot. baseband-androidboot. carrier-androidboot. bootloader-androidboot. hardware-configure gets the hardware information. If the parameter line does not indicate it, find-parsing/init in/proc/cupinfo. "hardware information 」. RC-early-init -Set the initialization parameters, coldboot/sys/class/sys/block/sys/devices, and locate the uevent files under these categories, and make the kernel regenerate those events before the start of the init Configuration Manager. -Initialize the property and retrieve the property from/Default. Prop. -If Ro. when debuggable is set to 1, the keychord listener is initialized to open the console, if the console is not specified in the production line, the/dev/console-steal with the default password is used to retrieve the/initlogo. rle is the bitwise operator of the 565 RLE operator. If it succeeds, the logo is displayed in/dev/fb0, in case of loss, set/dev/tty0 to text mode and enable/dev/tty0. The Android text is displayed as follows. -Determine the number of bytes in the queue:-If the bootmode is-factory, set Ro. factorytest is set to 1-factory2 and Ro is set. factorytest value is 2-Other preset Ro. factorytest value is 0-If serialno exists, set Ro. serialno, otherwise it is ""-If bootmod is available, set Ro. bootmod, otherwise "unknown"-If baseband exists, set Ro. baseband, otherwise "unknown"-If carrier exists, set Ro. carrier, otherwise "unknown"-If bootloader exists, set Ro. bootloader, otherwise "unknown"-set Ro. hardware-set Ro. version-when all the tokens in the row are identified as init action-start the property server and retrieve some property files. The operation must be performed after the previous Ro. Foo settings so that/data/local. Prop cannot be used to them. -/System/build. prop-/system/default. prop-/data/local. prop-obtain the presistent propertie after the primary node obtains the recognized property, in/data/property-create a letter for sigchld handler Handler-confirm all initialization work completed-device_fd (device init completed)-property_set_fd (property Server start completed) -signal_recv_fd) -When all tokens in the row are identified as early-boot action-when all tokens in the row are identified as boot action-based on the previous property signature, the action-Token-token event that identifies a property in all the tokens in the primary row:-device_fd-property_set_fd-signal_recv_fd-If keychord exists, the primary key chord_fd-If bootchart is supported, initialize bootchart-import main progress cycle:-reset the acceptance cycle of the zookeeper event, revents is 0-check whether the action parameter column-repeat the progress that needs to be re-processed-Zookeeper event-if the revents of signal_recv_fd is Pollin, a message is obtained, fetch and handle-if the revents of device_fd is Pollin, call handle_device_fd-if the revents of property_fd is Pollin, call notify-if the revents of keychord_fd is Pollin, call handle_keychord