问题描述
我在Linux上使用此sed命令来修补一个文件，并且工作正常:
I am using this sed command on Linux, to patch one file, and it works fine:
sed -i -r "s/(\tpublic function __call.*)/\1\n\t\treturn null;/" rb.php
但是当我在OS X上尝试此命令时，出现错误:
But when I try this command on OS X, I am getting an error:
sed: 1: "s/(\tpublic function __ ...": \1 not defined in the RE
那么，有人可以帮助我做出在Linux和OS X上都可以使用的命令吗?
So, can anybody help me to make command that will work both on Linux and OS X?
顺便说一句，我尝试了类似的命令:
By the way, I tried command like:
sed -i '' -r "s/(\tpublic function __call.*)/\1\n\t\treturn null;/" rb.php
但它在Linux上不起作用.
but it doesn't work on Linux.
推荐答案
对于Mac OS X sed，请使用-E而不是-r来获取ERE.此外，还不存在GNU扩展，因此您需要文字字符而不是\t和\n元字符.
For the Mac OS X sed, use -E instead of -r to get EREs. Additionally, the GNU extensions aren't there, so you'll need literal characters instead of the \t and \n metacharacters.
或者当然也可以安装GNU sed.
Or just install GNU sed, of course.
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