意外标记附近的语法错误 - bash
我正在尝试编写一个简单的 bash 脚本。它只是根据满足某些条件输出几行。我陷入了 if-else 条件，似乎无法找到出路。
这是代码：
if [ ( "${MODE}" == "top10gainers" ) || ( "${MODE}" == "top10losers" ) ]; then
echo "Top Gainers"
elif [ "${MODE}" == "solo" ]; then
echo "Going solo"
fi
我得到的错误是：
syntax error near unexpected token `"${MODE}"'
`if [ ( "${MODE}" == "top10gainers" ) || ( "${MODE}" == "top10losers" ) ]; then'
我已经用谷歌搜索并尝试搜索论坛（包括SO）但没有找到解决方案。我还在 OR 条件下尝试了不同的括号，但它们也没有起作用。
I am trying to write a simple bash script. It just puts out a few lines based on some conditions being satisfied. I am getting stuck on an if-else condition and cannot seem to figure a way out.
Here is the code:
if [ ( "${MODE}" == "top10gainers" ) || ( "${MODE}" == "top10losers" ) ]; then
echo "Top Gainers"
elif [ "${MODE}" == "solo" ]; then
echo "Going solo"
fi
The error I get is:
syntax error near unexpected token `"${MODE}"'
`if [ ( "${MODE}" == "top10gainers" ) || ( "${MODE}" == "top10losers" ) ]; then'
I have googled and tried to search forums (including SO) but have not come across a solution. I have also tried out different brackets in the OR condition, but they have not worked either.
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评论（3）
或者
or
括号在子 shell 中执行其内容，这不是您想要的，并且字符串与单个
=进行比较。请注意，如果您以后想要比较数字，请使用
-eq而不是=。编辑：测试，我发现
==也有效，但手册页中没有提及它们；它可能是 bash 内置版本的扩展。如果你想完全便携，我会坚持使用=。Parentheses execute their contents in a subshell, that's not what you want, and strings are compared with a single
=.Note that if you want to compare numbers in the future, use
-eqinstead of=.Edit: Testing, I found
==works too, but there's no mention of them in the man page; it might be an extension in the bash built-in version. I'd stick to=if you want to be at all portable.如果您显式使用 bash（即以
#!/bin/bash而不是#!/bin/sh开头），另一种选择是使用 bash 的内置 < code>[[ 命令，如下所示：请注意，
[[不需要引用可能包含空格的变量，这与[或test 不同。Another option, if you are explicitly using bash (that is, starting with
#!/bin/bashinstead of#!/bin/sh) is to use bash's builtin[[command, like so:Note that
[[doesn't require quoting around variables that may contain spaces, unlike[ortest.