bash 如果任何命令失败，如何撤消“set -e”使bash立即退出的效果？
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How to undo the effect of "set -e" which makes bash exit immediately if any command fails?
提问by Tianyi Cui
After entering set -ein an interactive bash shell, bash will exit immediately if any command exits with non-zero. How can I undo this effect?
进入set -e交互式 bash shell 后，如果任何命令以非零值退出，bash 将立即退出。我怎样才能撤销这个效果？
回答by zwol
With set +e. Yeah, it's backward that you enableshell options with set -and disablethem with set +. Historical raisins, donchanow.
与set +e. 是啊，这是落后的，你能够用shell选项set -，并禁止与他们set +。历史葡萄干，donchanow。
回答by szeryf
It might be unhandy to use set +e/set -eeach time you want to override it. I found a simpler solution.
每次要覆盖它时都使用set +e/可能不方便set -e。我找到了一个更简单的解决方案。
Instead of doing it like this:
而不是这样做：
set +e
command_that_might_fail_but_we_want_to_ignore_it
set -e
you can do it like this:
你可以这样做：
command_that_might_fail_but_we_want_to_ignore_it || true
or, if you want to save keystrokes and don't mind being a little cryptic:
或者，如果你想保存击键并且不介意有点神秘：
command_that_might_fail_but_we_want_to_ignore_it || :
Hope this helps!
希望这可以帮助！
