从一个多行输出中提取多行 Bash

Question

我有一个命令 dumpsys power 输出为：

    POWER MANAGER (dumpsys power)
    Power Manager State: mDirty=0x0
    mWakefulness=Awake #
    mWakefulnessChanging=false
    mIsPowered=false
    mPlugType=0
    mBatteryLevel=67 #
    mBatteryLevelWhenDreamStarted=0
    mDockState=0
    mStayOn=false #
    mProximityPositive=false
    mBootCompleted=true #
    mSystemReady=true #
    mHalAutoSuspendModeEnabled=false
    mHalInteractiveModeEnabled=true
    mWakeLockSummary=0x0
    mUserActivitySummary=0x1
    mRequestWaitForNegativeProximity=false
    mSandmanScheduled=false
    mSandmanSummoned=false
    mLowPowerModeEnabled=false #
    mBatteryLevelLow=false #
    mLastWakeTime=134887327 (59454 ms ago) #
    mLastSleepTime=134881809 (64972 ms ago) #
    mLastUserActivityTime=134946670 (111 ms ago)
mLastUserActivityTimeNoChangeLights=134794061 (152720 ms ago)
mLastInteractivePowerHintTime=134946670 (111 ms ago)
mLastScreenBrightnessBoostTime=0 (134946781 ms ago)
mScreenBrightnessBoostInProgress=false
mDisplayReady=true #
mHoldingWakeLockSuspendBlocker=false
mHoldingDisplaySuspendBlocker=true
    Settings and Configuration:
mDecoupleHalAutoSuspendModeFromDisplayConfig=false
mDecoupleHalInteractiveModeFromDisplayConfig=true
mWakeUpWhenPluggedOrUnpluggedConfig=true
mWakeUpWhenPluggedOrUnpluggedInTheaterModeConfig=false
mTheaterModeEnabled=false
mSuspendWhenScreenOffDueToProximityConfig=false
mDreamsSupportedConfig=true
mDreamsEnabledByDefaultConfig=true
mDreamsActivatedOnSleepByDefaultConfig=false
mDreamsActivatedOnDockByDefaultConfig=true
mDreamsEnabledOnBatteryConfig=false
mDreamsBatteryLevelMinimumWhenPoweredConfig=-1
mDreamsBatteryLevelMinimumWhenNotPoweredConfig=15
mDreamsBatteryLevelDrainCutoffConfig=5
mDreamsEnabledSetting=false
mDreamsActivateOnSleepSetting=false
mDreamsActivateOnDockSetting=true
mDozeAfterScreenOffConfig=true
mLowPowerModeSetting=false
mAutoLowPowerModeConfigured=false
mAutoLowPowerModeSnoozing=false
mMinimumScreenOffTimeoutConfig=10000
mMaximumScreenDimDurationConfig=7000
mMaximumScreenDimRatioConfig=0.20000005
mScreenOffTimeoutSetting=60000 #
mSleepTimeoutSetting=-1
mMaximumScreenOffTimeoutFromDeviceAdmin=2147483647 (enforced=false)
mStayOnWhilePluggedInSetting=0
mScreenBrightnessSetting=102
mScreenAutoBrightnessAdjustmentSetting=-1.0
mScreenBrightnessModeSetting=1
mScreenBrightnessOverrideFromWindowManager=-1
mUserActivityTimeoutOverrideFromWindowManager=-1
mTemporaryScreenBrightnessSettingOverride=-1
mTemporaryScreenAutoBrightnessAdjustmentSettingOverride=NaN
mDozeScreenStateOverrideFromDreamManager=0
mDozeScreenBrightnessOverrideFromDreamManager=-1
mScreenBrightnessSettingMinimum=10
mScreenBrightnessSettingMaximum=255
mScreenBrightnessSettingDefault=102
Sleep timeout: -1 ms
Screen off timeout: 60000 ms
Screen dim duration: 7000 ms
Wake Locks: size=0 Suspend Blockers: size=4
PowerManagerService.WakeLocks: ref count=0
PowerManagerService.Display: ref count=1
PowerManagerService.Broadcasts: ref count=0
PowerManagerService.WirelessChargerDetector: ref count=0
Display Power: state=ON #

我想以以下格式获取标有#的行：

mScreenOffTimeoutSetting=60000
mDisplayReady=true
***
ScreenOfftimeoutSetting = 60000
DisplayReady = true

命令输出可能因设备而异，有些行可能不存在或位于不同的位置。因此，如果搜索到的行不存在，则不应生成任何错误。

Answer 1

不清楚你想要什么。 Aou 可以使用 sed 从文件中提取变量并用它们做任何你想做的事。这是一个例子：

sed -n -e 's/^mSomeName=\(.*\)/newVariable=/p' -e 's/^mOtherName=.*+\(.*\)/newVariable2=/p' myFile

解释：

-n 默认情况下不输出任何内容
-e 后跟一个表达式。这是必需的，因为我们有多个表达式
s/^mSomeName=$.*$/newVariable=/p 如果文件以 mSomeName= 开头 (^) 捕获后面的内容 ($.*$)，将行替换为 newVariable=，其中 </code> 是被捕获的，打印出来 (<code>p)
's/^mOtherName=.+(.)/newVariable2=/p' 类似于前面的表达式，但会捕获 + 符号后面的内容并将其打印在 newVariable2

这类似于：

$ sed -n -e 's/^mSomeName=\(.*\)/newVariable=/p' -e 's/^mOtherName=.*+\(.*\)/newVariable2=/p' <<<$'mSomeName=SomeValue\nmOtherName=OtherValue+Somethingelse'
newVariable=SomeValue
newVariable2=Somethingelse

<<<$'...' 是一种将带有换行符的字符串 \n 直接传递给 bash 中的命令的方法。您可以将其替换为文件。这个命令只是输出一个字符串，什么都不会改变。

如果您在 bash 变量中需要它们，请使用 eval:

$ eval $(sed -n -e 's/^mSomeName=\(.*\)/newVariable=/p' -e 's/^mOtherName=.*+\(.*\)/newVariable2=/p' <<<$'mSomeName=SomeValue\nmOtherName=OtherValue+Somethingelse')
$ echo newVariable=$newVariable - newVariable2=$newVariable2
newVariable=SomeValue - newVariable2=Somethingelse

eval 将执行在本例中设置变量值的字符串：

$ eval a=1
$ echo $a
1

Answer 2

如果只想使用 Grep 命令，可以使用 -A（之后）和 -B（之前）选项和管道。

这是一个包含 2 行的示例。

文件test.txt:

test
aieauieaui
test
caieaieaipe

mSomeName=SomeValue
mOtherName=OtherValue+Somethingelse
nothing
blabla
mSomeName=SomeValue2
mOtherName=OtherValue+Somethingelse2

要使用的命令：

grep -A 1 'mSomeName' test.txt |grep -B 1 'mOtherName'

输出：

mSomeName=SomeValue
mOtherName=OtherValue+Somethingelse
--
mSomeName=SomeValue2
mOtherName=OtherValue+Somethingelse2

从一个多行输出中提取多行 Bash

Greping multiple lines from one multiline output Bash

bash

awk

output

dumpsys