bash 意外标记“<”附近的语法错误
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原文地址: http://stackoverflow.com/questions/36144610/
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syntax error near unexpected token `<'
提问by Billy Chan
StudentAnwser=()
inputScriptFile=001.sh
while IFS= read -r line;
do
StudentAnwser+=( "$line" )
done < <( sh $inputScriptFile test.txt )
it returns a error
它返回一个错误
foo.sh: line 22: syntax error near unexpected token `<'
foo.sh: line 22: ` done < <( sh $inputScriptFile test.txt )'
what's wrong with that? I follow the solution from other question for reading line from result
那有什么问题？我按照其他问题的解决方案从结果中读取行
回答by Lin
You get the error because process substitution(the <(some command)part) is not a standard feature (defined in POSIX) in sh, which means it may work on some OS but may not in others or in the same OS with different configuration.
您会收到错误消息，因为进程替换（<(some command)部分）不是 中的标准功能（在 POSIX 中定义）sh，这意味着它可能适用于某些操作系统，但可能不适用于其他操作系统或具有不同配置的同一操作系统。
You clarified that you have #!/bin/bashat the top of your script, but I guess you still run the script via sh foo.sh, as such, #!/bin/bashwill be ignored and the script is interpreted by sh.
您澄清说您#!/bin/bash在脚本的顶部，但我猜您仍然通过 运行脚本sh foo.sh，因此，#!/bin/bash将被忽略并且脚本由sh.
I assume your default shell is bash(run echo $SHELL), so all problems are gone if you paste the script in terminal and execute.
我假设您的默认 shell 是bash(run echo $SHELL)，因此如果您将脚本粘贴到终端中并执行，所有问题都会消失。
==== UPDATE ====
==== 更新 ====
Possible solution if my assumption is correct:
如果我的假设是正确的，可能的解决方案：
Leave #!/bin/bashas it is, make your script an executable by chmod +x foo.sh. Then run it directly by ./foo.sh
保持#!/bin/bash原样，使您的脚本成为可执行文件chmod +x foo.sh。然后直接运行./foo.sh
