击：读行的文件，并避免与＃线

问题描述

我试过这样：

file="myfile"
while read -r line
    do
        [[ $line = \#* ]] && continue
        "address=\$line\127.0.0.1"
    done < "$file"

这code不避免与注释开头的行。即使我没有任何意见，的dnsmasq 告诉有错误。

This code doesn't avoid the lines that begin with comments. Even if I don't have any comments, dnsmasq tells that there are errors.

它会是一个的dnsmasq 的conf文件，它会读取并插入域名，就像这样：地址= \\ mydomain.com \\ 127.0 .0.1 。

Its going to be a dnsmasq conf file, and it will read and insert domain names like so: address=\mydomain.com\127.0.0.1.

输入文件：

domain1.com
domain2.com
domain3.com
#domain4.com
domain5.com

输出应该是：

address=/domain1.com/127.0.0.1
address=/domain2.com/127.0.0.1
address=/domain3.com/127.0.0.1
address=/domain5.com/127.0.0.1

我会的 /etc/dnsmasq.d / 的下降脚本目录，这样的可以处理它时，启动的dnsmasq 。

I will drop the script in /etc/dnsmasq.d/ directory so that dnsmaq.conf can process it when dnsmasq is started.

推荐答案

它的安全使用 [$行=\\＃*]]

顺便说一句，地址=\\\\ $ {}行\\\\ 127.0.0.1

UPD

如果我理解你的权利，你需要在每个注释掉域更改为地址= \\域\\ 127.0.0.1 。它可以做快速和容易与 SED ，还有在bash程序没有必要。

If I've understand you right you need to change every uncommented domains to address=\domain\127.0.0.1. It could be done fast and easy with sed, there is no need in bash-program.

$> cat ./text
domain1.com
domain2.com
domain3.com
#domain4.com
domain5.com

$> sed -r -e 's/(^[^#]*$)/address=\/\1\/127.0.0.1/g' ./text2
address=/domain1.com/127.0.0.1
address=/domain2.com/127.0.0.1
address=/domain3.com/127.0.0.1
#domain4.com
address=/domain5.com/127.0.0.1

如果您需要删除注释行，用sed可以用 / matched_line / D

If you need to remove commented lines, sed can do it too with /matched_line/d

$> sed -r -e 's/(^[^#]*$)/address=\/\1\/127.0.0.1/g; /^#.*$/d' ./text2
address=/domain1.com/127.0.0.1
address=/domain2.com/127.0.0.1
address=/domain3.com/127.0.0.1
address=/domain5.com/127.0.0.1

UPD2 ：如果你想要做的bash脚本里面所有的东西，这里是你的code修改：

UPD2: if you want to do all that stuff inside the bash script, here is your code modification:

file="./text2"
while read -r line; do
    [[ "$line" =~ ^#.*$ ]] && continue
    echo "address=/${line}/127.0.0.1"
done < "$file"

和它的输出：

address=/domain1.com/127.0.0.1
address=/domain2.com/127.0.0.1
address=/domain3.com/127.0.0.1
address=/domain5.com/127.0.0.1

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