sed就地标志，可在Mac(BSD)和Linux上使用

本文介绍了sed就地标志，可在Mac(BSD)和Linux上使用的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

是否调用了sed以进行就地编辑而无需备份，而该备份在Linux和Mac上都可以使用?虽然OS X附带的BSD sed似乎需要sed -i '' …，但GNU sed Linux发行版通常随附将引号解释为空的输入文件名(而不是备份扩展名)，而需要使用sed -i ….

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.

是否有任何两种语法都可以使用的命令行语法，所以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

如果您真的只想简单地使用sed -i，那么以下方法在GNU和BSD/Mac sed上均可使用:

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

请注意缺少空格和点.

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

很显然，您可以删除.bak文件.

Obviously you could then just delete the .bak files.