sed 就地标志,适用于 Mac (BSD) 和 Linux [英] sed in-place flag that works both on Mac (BSD) and Linux
问题描述
是否可以在 Linux 和 Mac 上调用 sed
在没有备份的情况下进行就地编辑?虽然 OS X 附带的 BSD sed
似乎需要 sed -i '' ...
,但 GNU sed
Linux 发行版通常带有解释引号作为空输入文件名(而不是备份扩展名),并且需要 sed -i ...
代替.
Is there an invocation of sed
todo in-place editing without backups that works both on Linux and Mac? While the BSD sed
shipped with OS X seems to need sed -i '' …
, the GNU sed
Linux distributions usually come with interprets the quotes as empty input file name (instead of the backup extension), and needs sed -i …
instead.
是否有适用于两种风格的命令行语法,以便我可以在两个系统上使用相同的脚本?
Is there any command line syntax which works with both flavors, so I can use the same script on both systems?
推荐答案
如果您真的只想使用 sed -i
'简单' 的方式,以下在 GNU 和 BSD 上都适用/Mac sed
:
If you really want to just use sed -i
the 'easy' way, the following DOES work on both GNU and BSD/Mac sed
:
sed -i.bak 's/foo/bar/' filename
注意缺少空格和点.
证明:
# GNU sed
% sed --version | head -1
GNU sed version 4.2.1
% echo 'foo' > file
% sed -i.bak 's/foo/bar/' ./file
% ls
file file.bak
% cat ./file
bar
# BSD sed
% sed --version 2>&1 | head -1
sed: illegal option -- -
% echo 'foo' > file
% sed -i.bak 's/foo/bar/' ./file
% ls
file file.bak
% cat ./file
bar
显然,您可以删除 .bak
文件.
Obviously you could then just delete the .bak
files.
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