腳本的那些事兒

• 文件列表
  作爲一個碼農，經常需要看內核代碼。內核代碼萬萬，筆者需要生成一個實際使用編譯的文件列表。下面是生成的腳本。

簡單版

#!/bin/bash

cat /dev/null > /dev/shm/kernel.files
for file in $(find -L src -type f -regex '.*\.o')
do
    [ -f ${file%.o}.c ] && echo ${file%.o}.c >> /dev/shm/kernel.files
    [ -f ${file%.o}.h ] && echo ${file%.o}.h >> /dev/shm/kernel.files
done

[ -f /dev/shm/kernel.files ] && cp /dev/shm/kernel.files kernel.files

增強版

#!/bin/bash

add_files()
{
    for file in $@
    do
        [ -f $file ] && echo $file >> /dev/shm/kernel.files
    done
}

add_dirs()
{
    for dir in $@
    do
        for file in $(find -L $dir -type f -regex '.*\.[ch]')
        do
            [ -e ${file} ] && echo ${file} >> /dev/shm/kernel.files
        done
    done
}

IGNORE_DIR="-path obj/source/oe-workdir"
# IGNORE_DIR+="-o -path $your_dir_want_to_ignore"

cat /dev/null > /dev/shm/kernel.files

## Please add extern files here.
# add_files your_files

## Please add extern files here.
add_dirs    obj/arch/arm/include/generated      \
            obj/include/generated               \
            obj/include/config/snd

for file in $(find -L obj \( ${IGNORE_DIR} \) -prune -o -type f -regex '.*\.o')
do
    tmp=src${file#obj}
    [ -f ${tmp%.o}.c ] && echo ${tmp%.o}.c >> /dev/shm/kernel.files
    [ -f ${tmp%.o}.h ] && echo ${tmp%.o}.h >> /dev/shm/kernel.files
done

[ -f /dev/shm/kernel.files ] && cp /dev/shm/kernel.files kernel.files

在文件列表的基礎上，增加字符串查找。

#!/bin/bash

for file in $(cat kernel.files)
do
    [ -f ${file} ] && (
        info=$(grep -rn "${1}" ${file})
        [ -n "$info" ] && echo -E "${file} $info"
    )
done