shell脚本，对指定目录下C文件，替换和删除字符串

#!/bin/sh
echo -e "file patch"
read file_path

find $file_path -name "*.c" > path.txt
dos2unix -q path.txt
line_number=$(cat path.txt | wc-l)
for(i=1;i<$line_number;i++)
{
    sed_para="$(i)p"

    cmd="sed -n "$sed_para" path.txt"

    scm_file=$($cmd)

    sed -i '/xxxxx/d' $scm_file #delete line include xxxxx

    sed -i '/xxxxx/yyyyy/d' $scm_file #replace xxxxx to yyyyy

}
rm -f path_txt