i.mx6 Android5.1.1 系统属性

 属性变更的请求时init事件循环处理的另一个事件，在Android平台中，为了让运行中的所有进程共享系统运行时所需要的各种设置值，系统开辟了属性存储区域，并提供了访问该区域的API。属性由键(key)与值(value)构成，其表现形式为“键=值”。在Linux系统中，属性服务主要用来设置环境变量，提供各进程访问设定的环境变量值。在Android平台中，在访问属性值时，添加了访问权限控制，增强了访问的安全性。系统中所有运行中的进程都可以访问属性值，但仅有init进程才能修改属性值。其他进程修改属性值时，必须向init进程提出请求，最终由init进程负责修改属性值。在此过程中，init进程会先检查各属性的访问权限，而后再修改属性值，当属性值更改后，若定义在init.rc文件中的某个特定条件得到满足，则与此条件相匹配的动作就会发生，每个动作都有一个触发器，决定动作的执行时间，记录在“on property”关键字后的命令即被执行。

 

 

root@sabresd_6dq:/ # getprop
[CPU]: [i.MX6 Cortex A9 1.0GHz]
[FileSystemVersion]: [001]
[RAM]: [DDR3 1.0GB]
[SoftwarePartNumber]: [0713625406xx]
[alsa.mixer.capture.headset]: [Capture]
[alsa.mixer.capture.master]: [Capture]
[alsa.mixer.playback.headset]: [Headphone]
[alsa.mixer.playback.master]: [Playback]
[alsa.mixer.playback.speaker]: [Playback]
[back_camera_orient]: [0]
[camera.disable_zsl_mode]: [1]
[dalvik.vm.dex2oat-Xms]: [64m]
[dalvik.vm.dex2oat-Xmx]: [512m]
[dalvik.vm.dexopt-flags]: [m=y]
[dalvik.vm.heapgrowthlimit]: [80m]
[dalvik.vm.heapmaxfree]: [8m]
[dalvik.vm.heapminfree]: [512k]
[dalvik.vm.heapsize]: [384m]
[dalvik.vm.heapstartsize]: [8m]
[dalvik.vm.heaptargetutilization]: [0.75]
[dalvik.vm.image-dex2oat-Xms]: [64m]
[dalvik.vm.image-dex2oat-Xmx]: [64m]
[dalvik.vm.isa.arm.features]: [default]
[dalvik.vm.stack-trace-file]: [/data/anr/traces.txt]
[debug.egl.hw]: [1]
[debug.force_rtl]: [0]
[debug.sf.enable_hgl]: [1]
[debug.sf.showfps]: [0]
[dev.bootcomplete]: [1]
[front_camera_orient]: [0]
[gsm.current.phone-type]: [1]
[gsm.network.type]: [Unknown]
[gsm.operator.alpha]: []
[gsm.operator.iso-country]: []
[gsm.operator.isroaming]: [false]
[gsm.operator.numeric]: []
[gsm.ril.delay]: [15]
[gsm.sim.operator.alpha]: []
[gsm.sim.operator.iso-country]: []
[gsm.sim.operator.numeric]: []
[gsm.sim.state]: [NOT_READY]
[hw.backlight.dev]: [pwm-backlight.0]
[hwc.enable_dither]: [1]
[hwc.stretch.filter]: [1]
[init.svc.adbd]: [running]
[init.svc.bootanim]: [stopped]
[init.svc.console]: [running]
[init.svc.debuggerd]: [running]
[init.svc.drm]: [running]
[init.svc.healthd]: [running]
[init.svc.installd]: [running]
[init.svc.keystore]: [running]
[init.svc.lmkd]: [running]
[init.svc.logd]: [running]
[init.svc.media]: [running]
[init.svc.netd]: [running]
[init.svc.ril-daemon]: [running]
[init.svc.sdcard]: [running]
[init.svc.servicemanager]: [running]
[init.svc.surfaceflinger]: [running]
[init.svc.ueventd]: [running]
[init.svc.vold]: [running]
[init.svc.watchdogd]: [running]
[init.svc.wifi_mac]: [stopped]
[init.svc.zygote]: [running]
[media.omxgm.enable-player]: [1]
[media.omxgm.enable-record]: [1]
[media.omxgm.enable-scan]: [1]
[media.wfd.video-bitrate]: [3000000]
[net.bt.name]: [Android]
[net.change]: [net.qtaguid_enabled]
[net.hostname]: [android-83a3ccab22cf4b3e]
[net.qtaguid_enabled]: [1]
[net.tcp.default_init_rwnd]: [60]
[persist.sampling_profiler]: [1]
[persist.sys.dalvik.vm.lib.2]: [libart.so]
[persist.sys.profiler_ms]: [0]
[persist.sys.strictmode.disable]: [1]
[persist.sys.strictmode.visual]: [0]
[persist.sys.usb.config]: [mtp,adb]
[ro.FSL_AAC_PARSER]: [1]
[ro.FSL_ASF_PARSER]: [0]
[ro.FSL_AVI_PARSER]: [1]
[ro.FSL_FLAC_PARSER]: [1]
[ro.FSL_FLV_PARSER]: [1]
[ro.FSL_MKV_PARSER]: [1]
[ro.FSL_MPG2_PARSER]: [1]
[ro.FSL_REAL_PARSER]: [0]
[ro.adb.secure]: [0]
[ro.allow.mock.location]: [1]
[ro.baseband]: [unknown]
[ro.board.platform]: [imx6]
[ro.boot.console]: [ttymxc0]
[ro.boot.hardware]: [freescale]
[ro.boot.selinux]: [disabled]
[ro.boot.serialno]: [102231d4e6b416f0]
[ro.boot.storage_type]: [emmc]
[ro.bootloader]: [unknown]
[ro.bootmode]: [unknown]
[ro.build.characteristics]: [tablet]
[ro.build.date.utc]: [1498616731]
[ro.build.date]: [三  6月 28 10:25:31 CST 2017]
[ro.build.description]: [sabresd_6dq-user 5.1.1 2.1.0-ga-rc3 20151218 release-keys]
[ro.build.display.id]: [2.1.0-ga-rc3 release-keys]
[ro.build.fingerprint]: [Freescale/sabresd_6dq/sabresd_6dq:5.1.1/2.1.0-ga-rc3/20151218:user/release-keys]
[ro.build.flavor]: [sabresd_6dq-user]
[ro.build.host]: [imx6]
[ro.build.id]: [2.1.0-ga-rc3]
[ro.build.product]: [sabresd_6dq]
[ro.build.tags]: [release-keys]
[ro.build.type]: [user]
[ro.build.user]: [lee]
[ro.build.version.all_codenames]: [REL]
[ro.build.version.base_os]: []
[ro.build.version.codename]: [REL]
[ro.build.version.incremental]: [20151218]
[ro.build.version.release]: [5.1.1]
[ro.build.version.sdk]: [22]
[ro.build.version.security_patch]: [2015-11-01]
[ro.carrier]: [unknown]
[ro.config.alarm_alert]: [Alarm_Classic.ogg]
[ro.config.notification_sound]: [OnTheHunt.ogg]
[ro.crypto.state]: [unencrypted]
[ro.dalvik.vm.native.bridge]: [0]
[ro.debuggable]: [1]
[ro.factorytest]: [0]
[ro.hardware.lightsensor]: [/sys/class/i2c-dev/i2c-2/device/2-0044/]
[ro.hardware]: [freescale]
[ro.lightsensor.threshold]: [20]
[ro.opengles.version]: [131072]
[ro.product.board]: [SABRESD]
[ro.product.brand]: [Freescale]
[ro.product.cpu.abi2]: [armeabi]
[ro.product.cpu.abi]: [armeabi-v7a]
[ro.product.cpu.abilist32]: [armeabi-v7a,armeabi]
[ro.product.cpu.abilist64]: []
[ro.product.cpu.abilist]: [armeabi-v7a,armeabi]
[ro.product.device]: [sabresd_6dq]
[ro.product.locale.language]: [en]
[ro.product.locale.region]: [US]
[ro.product.manufacturer]: [Freescale]
[ro.product.model]: [SABRESD-MX6DQ]
[ro.product.name]: [sabresd_6dq]
[ro.revision]: [0]
[ro.ril.wake_lock_timeout]: [300]
[ro.runtime.firstboot]: [1507795631553]
[ro.secure]: [0]
[ro.serialno]: [102231d4e6b416f0]
[ro.sf.hwrotation]: [0]
[ro.sf.lcd_density]: [160]
[ro.soc]: [i.MX6DL]
[ro.tether.denied]: [false]
[ro.wifi.channels]: []
[rw.VIDEO_RENDER_NAME]: [video_render.surface]
[selinux.reload_policy]: [1]
[service.bootanim.exit]: [1]
[sys.boot_completed]: [1]
[sys.emulated.battery]: [1]
[sys.interactive]: [active]
[sys.sysctl.extra_free_kbytes]: [12294]
[sys.usb.config]: [mtp,adb]
[sys.usb.state]: [mtp,adb]
[vold.post_fs_data_done]: [1]
[wifi.ap.interface]: [wlan0]
[wifi.interface]: [wlan0]
[wlan.interface]: [wlan0]

 

转载于:https://www.cnblogs.com/maogefff/p/7655337.html