使用awk将修改保存到位 [英] Save modifications in place with awk

问题描述

我正在学习awk，我想知道是否存在将更改写入文件的选项，与sed类似，在这里我将使用-i选项将更改保存到文件中.

I am learning awk and I would like to know if there is an option to write changes to file, similar to sed where I would use -i option to save modifications to a file.

我确实知道我可以使用重定向来编写更改.但是awk中有一个选项可以做到吗?

I do understand that I could use redirection to write changes. However is there an option in awk to do that?

推荐答案

最新的GNU Awk(因为 就地"文件编辑:

In latest GNU Awk (since 4.1.0 released), it has the option of "inplace" file editing:

[...]使用新工具构建的"inplace"扩展名可以用来模拟GNU"sed -i"功能. [...]

[...] The "inplace" extension, built using the new facility, can be used to simulate the GNU "sed -i" feature. [...]

示例用法:

$ gawk -i inplace '{ gsub(/foo/, "bar") }; { print }' file1 file2 file3

要保留备份:

$ gawk -i inplace -v INPLACE_SUFFIX=.bak '{ gsub(/foo/, "bar") }
> { print }' file1 file2 file3

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