linux - 读取 shell 脚本时如何处理未找到的文件

Question

我正在通过 shell 脚本从文件中读取一个字符串。它是这样的:

count = 0
while read LINE
do
    count++
    if [ "$LINE" == "NONE" ]
    then
       echo "state is NONE"
    else
       if [ "$LINE" == "PLAYING" ]
       then
           echo "state is PLAYING"
       fi
    fi
done<$FILENAME

这是我从文件中读取的内容，以及我如何处理它，如果找不到文件，现在我想做其他事情，有没有办法做到这一点？例如:

if[ file not found]
then
   do something
fi

Answer 1

if [ -f path_to_file ]
then
  echo "file was found"
else
  echo "file was not found"
fi