Question

我有一个文本文件done.txt，其中包含我需要执行某些操作的文件路径。这是我done.txt的第一部分：

/data/voice/Voice27Folds/1000/1017_009.flac
/data/voice/Voice27Folds/1000/1017_010.flac
/data/voice/Voice27Folds/1000/1017_013.flac
/data/voice/Voice27Folds/1000/1017_014.flac
/data/voice/Voice27Folds/1000/1017_015.flac
/data/voice/Voice27Folds/1000/1017_020.flac
/data/voice/Voice27Folds/1000/1017_025.flac
/data/voice/Voice27Folds/1000/1017_026.flac
/data/voice/Voice27Folds/1000/1017_027.flac
/data/voice/Voice27Folds/1000/1017_030.flac

.....

当我运行此命令时：

while IFS= read -r var
do
echo "$var" 
done < /data/voice/done.txt

我完全掌握了done.txt：

/data/voice/Voice27Folds/1000/1017_009.flac
/data/voice/Voice27Folds/1000/1017_010.flac
/data/voice/Voice27Folds/1000/1017_013.flac
/data/voice/Voice27Folds/1000/1017_014.flac
/data/voice/Voice27Folds/1000/1017_015.flac
/data/voice/Voice27Folds/1000/1017_020.flac
/data/voice/Voice27Folds/1000/1017_025.flac
/data/voice/Voice27Folds/1000/1017_026.flac
/data/voice/Voice27Folds/1000/1017_027.flac
/data/voice/Voice27Folds/1000/1017_030.flac

....

然而，当我尝试：

while IFS= read -r var
do
mv "$var" /data/voice #move all files to this directory
done < /data/voice/done.txt

我收到大量与目录相关的错误，如下所示：

mv: cannot stat '/data/voice/Voice27Folds/1000/1017_009.flac\r': No such file and directory
mv: cannot stat '/data/voice/Voice27Folds/1000/1017_013.flac\r': No such file and directory

...

我注意到正确的目录可能已更改，并在末尾附加了“\ _”。我该如何解决这个问题？

Answer 1

$'\r'是回车符 - 将光标发送回行首的指令。

在DOS（和Windows）上，文本文件的每一行以$'\r\n'（CRLF）结尾，而在UNIX上，每行仅以$'\n'结尾。因此，在UNIX上读取DOS文本文件时，每行似乎都有一个额外的$'\r'。

因为当echo打印该字符时，它会将光标移动到行的开头而不是创建任何类型的可见输出，因此无法使用echo "$var"区分存在拖尾回车情况（除非你在它之后打印任何内容 - echo "[$var]"会将]放在行的开头而不是结尾处。如果要以直观明确的方式打印显示隐藏字符的可变内容，请改用printf 'var=%q\n' "$var"。

while IFS= read -r var; do
  var=${var%$'\r'}         # remove any trailing carriage return from var
  mv -- "$var" /data/voice #move all files to this directory
done < /data/voice/done.txt

从文本文件中读取目录时更改

1 个答案: