意外令牌'<'附近的语法错误 [英] syntax error near unexpected token `<'

问题描述

StudentAnwser=()
inputScriptFile=001.sh

while IFS= read -r line;
do
    StudentAnwser+=( "$line" )
done < <( sh $inputScriptFile test.txt )

返回错误

foo.sh: line 22: syntax error near unexpected token `<'
foo.sh: line 22: `  done < <( sh $inputScriptFile test.txt )'

这有什么问题?我按照其他问题的解决方案从结果中读取行

what's wrong with that? I follow the solution from other question for reading line from result

推荐答案

由于流程替换(<(some command)部分)不是sh，这意味着它可以在某些操作系统上运行，但不能在其他操作系统或具有不同配置的同一操作系统上运行.

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.

您已说明脚本的顶部有#!/bin/bash，但我想您仍然通过sh foo.sh运行脚本，因此，#!/bin/bash将被忽略，脚本由sh解释.

You clarified that you have #!/bin/bash at the top of your script, but I guess you still run the script via sh foo.sh, as such, #!/bin/bash will be ignored and the script is interpreted by sh.

我假设您的默认shell是bash(运行echo $SHELL)，因此如果将脚本粘贴到终端并执行，所有问题都将消失.

I assume your default shell is bash (run echo $SHELL), so all problems are gone if you paste the script in terminal and execute.

====更新====

==== UPDATE ====

如果我的假设是正确的，可能的解决方案:

Possible solution if my assumption is correct:

保留#!/bin/bash的原样，通过chmod +x foo.sh使您的脚本成为可执行文件.然后直接通过./foo.sh

Leave #!/bin/bash as it is, make your script an executable by chmod +x foo.sh. Then run it directly by ./foo.sh

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