１、我們的平臺編譯kernel的時候總是要輸入項目名稱，很麻煩

################################################ ## Compile kernel and pack it into boot.img ## ################################################ #!/bin/sh PROJECT=$1 echo $PROJECT if [ "$1" = "" ];thenecho "Use: makeMtk.ini file for the mkkernel project_name" #exit 修改　sen -n "1p" makeMtk.ini獲取makeMtk.ini的第一行數據 #awk '{print $3}'獲取第三個參數　 #read LINE 把之前傳進來的參數讀取出來sed -n "1p" makeMtk.ini|awk '{print $3}'|while read LINEdoPROJECT=$LINE./makeMtk $PROJECT new kernel./makeMtk $PROJECT remake kernelecho ./mediatek/build/tools/images/mkbootimg --kernel ./out/Download/flash/kernel_$PROJECT.bin --ramdisk ./out/target/product/$PROJECT/ramdisk.img -o ./out/target/product/$PROJECT/boot.img./mediatek/build/tools/images/mkbootimg --kernel ./out/Download/flash/kernel_$PROJECT.bin --ramdisk ./out/target/product/$PROJECT/ramdisk.img -o ./out/target/product/$PROJECT/boot.imgdone#編譯完成后退出 exit elseecho "Use: $1 for the project name"PROJECT=$1 fi echo ./makeMtk $PROJECT new kernel ./makeMtk $PROJECT remake kernel echo ./mediatek/build/tools/images/mkbootimg --kernel ./out/Download/flash/kernel_$PROJECT.bin --ramdisk ./out/target/product/$PROJECT/ramdisk.img -o ./out/target/product/$PROJECT/boot.img ./mediatek/build/tools/images/mkbootimg --kernel ./out/Download/flash/kernel_$PROJECT.bin --ramdisk ./out/target/product/$PROJECT/ramdisk.img -o ./out/target/product/$PROJECT/boot.img

看到代碼里面我們每次要編譯內核的時候都要輸入./mkkernel mid713l_lp_lvds mid713l_lp_lvds 是項目名稱，我覺得很麻煩。

２、sed讀取文件的某一行

讀取文件的某一行可以看看sed 這個命令
sed -n “1p” mkkernel 顯示文件的第一行
sed -n “1,4p” mkkernel 顯示文件第一行到第四行

weiqifa@weiqifa-Inspiron-3847:~/weiqifa/new_tm100/tm100$ sed -n "1p" mkkernel ################################################ weiqifa@weiqifa-Inspiron-3847:~/weiqifa/new_tm100/tm100$ sed -n "1,4p" mkkernel ################################################ ## Compile kernel and pack it into boot.img ## ################################################ #!/bin/sh weiqifa@weiqifa-Inspiron-3847:~/weiqifa/new_tm100/tm100$

３、 awk截取某一列

awk ‘{print $3}’ 把管道前面的第三列顯示出來

weiqifa@weiqifa-Inspiron-3847:~/weiqifa/new_tm100/tm100$ cat makeMtk.ini project = mid713l_lp_lvds build_mode = eng weiqifa@weiqifa-Inspiron-3847:~/weiqifa/new_tm100/tm100$ cat makeMtk.ini |awk '{print $3}' mid713l_lp_lvds eng weiqifa@weiqifa-Inspiron-3847:~/weiqifa/new_tm100/tm100$

４、while read LINE ;do done 讀取文件

do done會重新起一個子shell　這是為什么我不能把$LINE傳下去的原因

sed -n "1p" makeMtk.ini|awk '{print $3}'|while read LINE do PROJECT=$LINE ./makeMtk $PROJECT new kernel ./makeMtk $PROJECT remake kernel echo ./mediatek/build/tools/images/mkbootimg --kernel ./out/Download/flash/kernel_$PROJECT.bin --ramdisk ./out/target/product/$PROJECT/ramdisk.img -o ./out/target/product/$PROJECT/boot.img ./mediatek/build/tools/images/mkbootimg --kernel ./out/Download/flash/kernel_$PROJECT.bin --ramdisk ./out/target/product/$PROJECT/ramdisk.img -o ./out/target/product/$PROJECT/boot.img done

５、用set -x set +x調試上面的說法

################################################ ## Compile kernel and pack it into boot.img ## ################################################ #!/bin/sh set -x if [ "$1" = "" ];thenecho "Use: makeMtk.ini file for the mkkernel project_name" #exit 修改　sen -n "1p" makeMtk.ini獲取makeMtk.ini的第一行數據 #awk '{print $3}'獲取第三個參數　 #read LINE 把之前傳進來的參數讀取出來sed -n "1p" makeMtk.ini|awk '{print $3}'|while read LINEdoPROJECT=$LINEecho $PROJECTbreakdoneecho $PROJECT#編譯完成后退出 #exit elseecho "Use: $1 for the project name"PROJECT=$1 fi echo ./makeMtk $PROJECT new kernel set +x #./makeMtk $PROJECT remake kernel #echo ./mediatek/build/tools/images/mkbootimg --kernel ./out/Download/flash/kernel_$PROJECT.bin --ramdisk ./out/target/product/$PROJECT/ramdisk.img -o ./out/target/product/$PROJECT/boot.img #./mediatek/build/tools/images/mkbootimg --kernel ./out/Download/flash/kernel_$PROJECT.bin --ramdisk ./out/target/product/$PROJECT/ramdisk.img -o ./out/target/product/$PROJECT/boot.img

輸出結果如下

weiqifa@weiqifa-Inspiron-3847:~/weiqifa/new_tm100/tm100$ ./wmkkernel ++ '[' '' = '' ']' ++ echo 'Use: makeMtk.ini file for the mkkernel project_name' Use: makeMtk.ini file for the mkkernel project_name ++ sed -n 1p makeMtk.ini ++ read LINE ++ awk '{print $3}' ++ PROJECT=mid713l_lp_lvds ++ echo mid713l_lp_lvds mid713l_lp_lvds ++ break ++ echo++ echo ./makeMtk new kernel ./makeMtk new kernel ++ set +x weiqifa@weiqifa-Inspiron-3847:~/weiqifa/new_tm100/tm100$ vim wmkkernel

所以最終我的修改方案是第一種，網上查的辦法行不通。

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