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basename 命令会随文件名一起输出“enter”字符

tag-icon • tag-icon linux command-line bash unix shell
basename 命令会随文件名一起输出“enter”字符

我正在使用 while 循环逐行读取文本文件，其内容是目录和文件名。我使用 basename 命令读取文件名。我想检查该文件是否存在于目录中。但下面写的代码不起作用。当我回显 basename 命令时，它会随文件名一起输出“enter”字符。我如何删除“enter”字符？

while read line;do
   file=`basename "$line"`
   dir=`dirname "$line"`
   if [ -f "/data/config/${file}" ]; then
    echo "${file} is present"
   fi
done < /data/textfile.txt*

textfile.txt 的内容如下

config/local/common/environment.properties
config/local/common/jmsservices.xml
config/local/common/ejbservices.xml

答案1

每man basename：

NAME
   basename - strip directory and suffix from filenames 
...
   -z, --zero
          end each output line with NUL, not newline

如果您决定使用-z，shell 可能会抱怨 NUL，这意味着您可能必须发送错误流至/dev/null。

答案2

这是 的默认行为echo。来自手册页

echo 实用程序将任何指定的操作数（以单个空格（“ ') characters and followed by a newline (\n'”）分隔）写入标准输出。

您可以指定-n避免添加换行符：

 -n    Do not print the trailing newline character.  This may also be achieved by appending `\c' to the end of the string, as is done by iBCS2 compatible systems.  Note that this option
       as well as the effect of `\c' are implementation-defined in IEEE Std 1003.1-2001 (``POSIX.1'') as amended by Cor. 1-2002.  Applications aiming for maximum portability are
       strongly encouraged to use printf(1) to suppress the newline character.

答案3

您可以使用删除多余的输入tr basename "$PWD" | tr -d '\n'

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