逐行读取文件并在 bash 中为每个文件执行操作
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Read file line by line and perform action for each in bash
提问by Marc S.
I have a text file, it contains a single word on each line.
我有一个文本文件，它每行包含一个单词。
I need a loop in bash to read each line, then perform a command each time it reads a line, using the input from that line as part of the command.
我需要一个 bash 循环来读取每一行，然后在每次读取一行时执行一个命令，使用该行的输入作为命令的一部分。
I am just not sure of the proper syntax to do this in bash. If anyone can help, it would be great. I need to use the line from the test file obtained as a paramter to call another function. The loop should stop when there are no more lines in the text file.
我只是不确定在 bash 中执行此操作的正确语法。如果有人可以提供帮助，那就太好了。我需要使用从测试文件中获取的行作为参数来调用另一个函数。当文本文件中没有更多行时，循环应该停止。
Psuedo code:
伪代码：
Read testfile.txt.
For each in testfile.txt
{
some_function linefromtestfile
}
回答by beny23
How about:
怎么样：
while read line
do
echo $line
// or some_function "$line"
done < testfile.txt
回答by Fredrik Pihl
As an alternative, using a file descriptor (#4 in this case):
作为替代方案，使用文件描述符（在本例中为 #4）：
file='testfile.txt'
exec 4<$file
while read -r -u4 t ; do
echo "$t"
done
Don't use cat! In a loop catis almost always wrong, i.e.
不要用cat！在循环cat中几乎总是错误的，即
cat testfile.txt | while read -r line
do
# do something with "$line" here
done
and people might start to throw an UUoCAat you.
人们可能会开始向你扔UUoCA。
回答by user12349296
while read line
do
nikto -Tuning x 1 6 -h $line -Format html -o NiktoSubdomainScans.html
done < testfile.txt
Tried this to automate nikto scan of list of domains after changing from cat approach. Still just read the first line and ignored everything else.
从 cat 方法更改后，尝试使用此方法自动执行域列表的 nikto 扫描。仍然只是阅读第一行并忽略其他所有内容。
