sed 插入行命令用新行 OSX 添加文本

Question

我正在尝试使用 sed 将文本插入到文件的第 100 行，我在其他论坛上找到的语法是：

sed -i '' "100i\ text to insert" filename

当我使用它时，我能够在特定行上添加文本，但它会影响已经存在的其他文本并将其放错位置。

我想在添加到文件的文本之前和之后添加一个新行。

我试过这个sed -i '' "100i\\ text to insert other text to insert" filename但它没有正常工作。

这是我运行上述命令时的输出。 顺序应该是<key>和下面应该是<string>标签。

<key>NSBluetoothAlwaysUsageDescription</key>    <key>NSLocationAlwaysAndWhenInUseUsageDescription</key>
<string>This will allow "App" to find and connect to Bluetooth accessories. This app may also use bluetooth to know when you are nearby.</string>   <string>This app requires constant access to your location in order to track your position, even when the screen is off or the app is in the background.</string>

我似乎无法弄清楚应该在命令中添加什么来添加新行。

我不想打扰订单，我只想在第 100 行插入文本，如果已经有文本，那么该文本应该转到新行。

我使用的是 OSX，这就是为什么我有一个空的 ' ' 作为我的扩展名。

谢谢！

Answer 1

如果你想添加一个换行符，你应该使用： $'\\n' ; ANSI 引用

有关 sed 换行符的更多信息

---

回答问题； 用：

sed -i '' -e "3s/^//p; 3s/^.*/text to insert/" /tmp/so.txt

1. 3s/^//p; 重复第 3 行
2. 3s/^.*/text to insert/"用您的文本替换新的第 3 行

编辑;

sed -i '' -e "3s/^//p; 3s/^.*/<key>NSBluetoothAlwaysUsageDescription<\/key>/" /tmp/so.txt

记住要转义任何/字符！

Answer 2

如果需要，请尝试 ed(1)。

printf '%s\n' 3a 'text to insert' . w | ed -s file

这里不需要逃避。

printf '%s\n' '100a' '<key>NSBluetoothAlwaysUsageDescription</key>    <key>NSLocationAlwaysAndWhenInUseUsageDescription</key>' '<string>This will allow "App" to find and connect to Bluetooth accessories. This app may also use bluetooth to know when you are nearby.</string>   <string>This app requires constant access to your location in order to track your position, even when the screen is off or the app is in the background.</string>' . w | ed -s file.txt

...或使用 Heredoc

ed -s file.txt <<'EOE'
100a
<key>NSBluetoothAlwaysUsageDescription</key>    <key>NSLocationAlwaysAndWhenInUseUsageDescription</key>
<string>This will allow "App" to find and connect to Bluetooth accessories. This app may also use bluetooth to know when you are nearby.</string>   <string>This app requires constant access to your location in order to track your position, even when the screen is off or the app is in the background.</string>
.
w
EOE

只需将file.txt替换为您的文件名。