dnf属性变更系统在哪里（dnf属性转移系统）

大家好，我是公众号3分钟学堂的郭立员~

前言

对于安卓系统属性的查看和修改需要命令行工具 getprop 和 setprop。

getprop 获取系统属性

setprop 修改系统属性

涉及到几个文件：

/default.prop /system/build.prop

研究这个是在找adb相关资料的时候找到的，发现只运行getprop 命令时，会输出很多系统属性。

Import "zm.luae" TracePrint zm.Execute("getprop")

输出结果：

[ack-trace-file]: [/data/anr/traces.txt] [app.setupwizard.disable]: [0] [dalvik.vm.appimageformat]: [lz4] [dalvik.vm.checkjni]: [false] [dalvik.vm.dex2oat-Xms]: [64m] [dalvik.vm.dex2oat-Xmx]: [512m] [dalvik.vm.heapgrowthlimit]: [192m] [dalvik.vm.heapmaxfree]: [8m] [dalvik.vm.heapminfree]: [512k] [dalvik.vm.heapsize]: [512m] [dalvik.vm.heapstartsize]: [16m] [dalvik.vm.heaptargetutilization]: [0.75] [dalvik.vm.image-dex2oat-Xms]: [64m] [dalvik.vm.image-dex2oat-Xmx]: [64m] [dalvik.vm.isa.x86.features]: [default] [dalvik.vm.isa.x86.variant]: [x86] [dalvik.vm.isa.x86_64.features]: [default] [dalvik.vm.isa.x86_64.variant]: [silvermont] [dalvik.vm.lockprof.threshold]: [500] [dalvik.vm.stack-trace-file]: [/data/anr/traces.txt] [dalvik.vm.usejit]: [true] [dalvik.vm.usejitprofiles]: [true] [debug.atrace.tags.enableflags]: [0] [debug.force_rtl]: [0] [debug.sf.nobootanimation]: [1] [dev.bootcomplete]: [1] [gsm.current.phone-type]: [1] [gsm.network.type]: [Unknown] [gsm.operator.alpha]: [] [gsm.operator.iso-country]: [] [gsm.operator.isroaming]: [false] [gsm.operator.numeric]: [] [gsm.sim.operator.alpha]: [] [gsm.sim.operator.iso-country]: [] [gsm.sim.operator.numeric]: [] [gsm.sim.state]: [NOT_READY] [init.svc.adbd]: [running] [init.svc.audioserver]: [running] [init.svc.cameraserver]: [running] [init.svc.debuggerd]: [running] [init.svc.debuggerd64]: [running] [init.svc.drm]: [running] [init.svc.gatekeeperd]: [running] [init.svc.healthd]: [running] [init.svc.installd]: [running] [init.svc.keystore]: [running] [init.svc.ldinit]: [running] [init.svc.lmkd]: [running] [init.svc.logd]: [running] [init.svc.logd-reinit]: [stopped] [init.svc.media]: [running] [init.svc.mediacodec]: [running] [init.svc.mediadrm]: [running] [init.svc.mediaextractor]: [running] [init.svc.nativebridge]: [stopped] [init.svc.netd]: [running] [init.svc.ril-daemon]: [running] [init.svc.servicemanager]: [running] [init.svc.su_daemon]: [running] [init.svc.surfaceflinger]: [running] [init.svc.ueventd]: [running] [init.svc.vold]: [running] [init.svc.zygote]: [running] [init.svc.zygote_secondary]: [running] [keyguard.no_require_sim]: [true] [media.sf.extractor-plugin]: [libffmpeg_extractor.so] [media.sf.hwaccel]: [1] [media.sf.omx-plugin]: [libffmpeg_omx.so] [net.bt.name]: [Android] [net.change]: [net.dns3] [net.dns1]: [192.168.31.1] [net.dns2]: [119.29.29.29] [net.dns3]: [114.114.114.114] [net.hostname]: [android-55b499c67c51e632] [net.qtaguid_enabled]: [0] [net.tcp.default_init_rwnd]: [60] [persist.imei]: [869394025762798] [persist.logd.logpersistd]: [] [persist.logd.logpersistd.buffer]: [] [persist.rtc_local_time]: [1] [persist.sys.build.time]: [1654223609] [persist.sys.country]: [CN] [persist.sys.dalvik.vm.lib.2]: [libart.so] [persist.sys.gps.lpp]: [] [persist.sys.language]: [zh] [persist.sys.locale]: [zh-CN] [persist.sys.localevar]: [] [persist.sys.nativebridge]: [1] [persist.sys.profiler_ms]: [0] [persist.sys.strictmode.disable]: [1] [persist.sys.strictmode.visual]: [0] [persist.sys.timezone]: [Asia/Shanghai] [persist.sys.usb.config]: [none] [persist.sys.webview.vmsize]: [169343248] [pm.dexopt.ab-ota]: [speed-profile] [pm.dexopt.bg-dexopt]: [speed-profile] [pm.dexopt.boot]: [verify-profile] [pm.dexopt.core-app]: [speed] [pm.dexopt.first-boot]: [interpret-only] [pm.dexopt.forced-dexopt]: [speed] [pm.dexopt.install]: [interpret-only] [pm.dexopt.nsys-library]: [speed] [pm.dexopt.shared-apk]: [speed] [ro.adb.secure]: [1] [ro.alarm.volume.adjustable]: [true] [ro.allow.mock.location]: [0] [ro.arch]: [x86] [ro.baseband]: [unknown] [ro.board.platform]: [aosp-user] [ro.boot.console]: [tty0] [ro.boot.selinux]: [permissive] [ro.boot.serialno]: [00d21e88] [ro.bootimage.build.date]: [Fri Jun 3 10:08:51 CST 2022] [ro.bootimage.build.date.utc]: [1654222131] [ro.bootimage.build.fingerprint]: [google/android_x86_64/x86_64:7.1.2/N2G47O/327:user/release-keys] [ro.bootloader]: [unknown] [ro.bootmode]: [unknown] [ro.build.characteristics]: [tablet] [ro.build.date]: [Fri Jun 3 10:08:51 CST 2022] [ro.build.date.utc]: [1654222131] [ro.build.description]: [android_x86_64-user 7.1.2 N2G47O 327 release-keys] [ro.build.display.id]: [N2G47O] [ro.build.fingerprint]: [google/android_x86_64/x86_64:7.1.2/N2G47O/327:user/release-keys] [ro.build.flavor]: [aosp-user] [ro.build.host]: [UBNX] [ro.build.id]: [N2G47O] [ro.build.product]: [aosp] [ro.build.tags]: [release-keys] [ro.build.time]: [1654223609] [ro.build.type]: [user] [ro.build.user]: [build] [ro.build.version.all_codenames]: [REL] [ro.build.version.base_os]: [] [ro.build.version.codename]: [REL] [ro.build.version.incremental]: [327] [ro.build.version.preview_sdk]: [0] [ro.build.version.release]: [7.1.2] [ro.build.version.sdk]: [25] [ro.build.version.security_patch]: [2017-10-05] [ro.carrier]: [unknown] [ro.com.android.dataroaming]: [true] [ro.com.android.dateformat]: [MM-dd-yyyy] [ro.config.alarm_alert]: [Alarm_Classic.ogg] [ro.config.notification_sound]: [OnTheHunt.ogg] [ro.config.sync]: [yes] [ro.crypto.state]: [unsupported] [ro.dalvik.vm.isa.arm]: [x86] [ro.dalvik.vm.isa.arm64]: [x86_64] [ro.dalvik.vm.native.bridge]: [libnb.so] [ro.debuggable]: [1] [ro.device_owner]: [false] [ro.enable.native.bridge.exec]: [1] [ro.enable.native.bridge.exec64]: [1] [ro.hardware]: [android_x86_64] [ro.hwui.drop_shadow_cache_size]: [4.0] [ro.hwui.gradient_cache_size]: [0.8] [ro.hwui.layer_cache_size]: [32.0] [ro.hwui.path_cache_size]: [24.0] [ro.hwui.text_large_cache_height]: [1024] [ro.hwui.text_large_cache_width]: [2048] [ro.hwui.text_small_cache_height]: [512] [ro.hwui.text_small_cache_width]: [1024] [ro.hwui.texture_cache_flushrate]: [0.4] [ro.hwui.texture_cache_size]: [48.0] [ro.opengles.max]: [196609] [ro.opengles.version]: [196609] [ro.product.board]: [V1938CT] [ro.product.brand]: [vivo] [ro.product.cpu.abi]: [x86_64] [ro.product.cpu.abilist]: [x86_64,x86,arm64-v8a,armeabi-v7a,armeabi] [ro.product.cpu.abilist32]: [x86,armeabi-v7a,armeabi] [ro.product.cpu.abilist64]: [x86_64,arm64-v8a] [ro.product.device]: [aosp] [ro.product.locale]: [en-US] [ro.product.locale.language]: [zh] [ro.product.locale.region]: [CN] [ro.product.manufacturer]: [vivo] [ro.product.model]: [V1938CT] [ro.product.name]: [V1938CT] [ro.radio.use-ppp]: [yes] [ro.revision]: [0] [ro.ril.gprsclass]: [10] [ro.ril.hsxpa]: [1] [ro.runtime.firstboot]: [1704614344671] [ro.secure]: [1] [ro.serialno]: [00d21e88] [ro.setupwizard.mode]: [DISABLED] [ro.sf.lcd_density]: [320] [ro.simulated.phone]: [false] [ro.wifi.channels]: [] [ro.zygote]: [zygote64_32] [security.perf_harden]: [1] [selinux.reload_policy]: [1] [service.bootanim.exit]: [1] [status.battery.level]: [5] [status.battery.level_raw]: [50] [status.battery.level_scale]: [9] [status.battery.state]: [Slow] [sys.boot_completed]: [1] [sys.logbootcomplete]: [1] [sys.media.vdec.drop]: [0] [sys.sysctl.extra_free_kbytes]: [10800] [sys.sysctl.tcp_def_init_rwnd]: [60] [sys.usb.config]: [adb] [sys.usb.configfs]: [0] [sys.usb.state]: [adb] [vold.has_adoptable]: [1] [vold.post_fs_data_done]: [1]

进一步查找发现这些系统属性保存在上面提到的文件：

/default.prop /system/build.prop

在上面的输出结果中，格式是这样的：[key]:[value]

key是属性名，value是属性值

getprop的用法：

getprop [key] 取得对应的key的属性值

比如获取手机品牌：

Import "zm.luae" TracePrint zm.Execute("getprop ro.product.brand") //输出结果：vivo

setprop的用法：

setprop [key] [value] 设置指定key的属性值。

如修改模拟器定位：

Import "zm.luae" TracePrint zm.Execute("getprop call.locate 117,29")