使用重定向在文件中写入变量的内容在 Bash 脚本的 for 循环中不起作用？

Question

#!/bin/bash

files=$( grep " jane " ../data/list.txt)

for f in $files; 
do 
    if test -e f; 
    then
        echo f >> oldFiles.txt;
    else
        echo "File doesn't exist";
    fi;
done

---

This code searches list.txt's file contents for "jane" and store results in files. This file is full of directory path addresses. Some of the directory path addresses include the word "jane".

After that, the for loop iterates over the files variable files, and one-by-one runs a test to check if the directory path is valid and actually does exist.

If the directory path exists, it copies the address in the iterator using redirection method into the file oldFiles.txt

When I do not create a file to run this script, and instead just use CLI directly to declare the 'files' variable and use the redirection method, it works. So, for example, when I enter the following in CLI directly:

files=$( grep " jane " ../data/list.txt) 

echo $files >> oldFiles.txt

This does the job. But the Bash script above does not work. What am I doing wrong?

Answer 1

#!/bin/bash

files=$( grep " jane " ../data/list.txt)

for f in $files; 
do 
    if test -e f; 
    then
        echo f >> oldFiles.txt;
    else
        echo "File doesn't exist";
    fi;
done

---

This code searches list.txt's file contents for "jane" and store results in files. This file is full of directory path addresses. Some of the directory path addresses include the word "jane".

After that, the for loop iterates over the files variable files, and one-by-one runs a test to check if the directory path is valid and actually does exist.

If the directory path exists, it copies the address in the iterator using redirection method into the file oldFiles.txt

When I do not create a file to run this script, and instead just use CLI directly to declare the 'files' variable and use the redirection method, it works. So, for example, when I enter the following in CLI directly:

files=$( grep " jane " ../data/list.txt) 

echo $files >> oldFiles.txt

This does the job. But the Bash script above does not work. What am I doing wrong?

Answer 2

#!/bin/bash

files=$( grep " jane " ../data/list.txt)

for f in $files; 
do 
    if test -e f; 
    then
        echo f >> oldFiles.txt;
    else
        echo "File doesn't exist";
    fi;
done

---

This code searches list.txt's file contents for "jane" and store results in files. This file is full of directory path addresses. Some of the directory path addresses include the word "jane".

After that, the for loop iterates over the files variable files, and one-by-one runs a test to check if the directory path is valid and actually does exist.

If the directory path exists, it copies the address in the iterator using redirection method into the file oldFiles.txt

When I do not create a file to run this script, and instead just use CLI directly to declare the 'files' variable and use the redirection method, it works. So, for example, when I enter the following in CLI directly:

files=$( grep " jane " ../data/list.txt) 

echo $files >> oldFiles.txt

This does the job. But the Bash script above does not work. What am I doing wrong?