bash 如何在 shell 脚本中解决此错误：“读取：非法选项 -t”？
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How can I resolve this error in shell scripting: "read: Illegal option -t"?
提问by Utkarsh Parekh
#!/bin/bash
echo -n "Hurry up and type something! > "
if read -t 10 response ; then
echo "Greate, you made it in time!"
else
echo "sorry, you are too slow!"
fi
I have written above code in terminal and got error "read: Illegal option -t".
我在终端中编写了上面的代码并收到错误“读取：非法选项 -t”。
采纳答案by Karoly Horvath
Bash supports -t, so it looks like you're trying to execute it with shor some other shell, which is odd, since you have the correct shebang.
Bash 支持-t，所以看起来您正在尝试使用sh或其他一些 shell来执行它，这很奇怪，因为您有正确的 shebang。
Make sure you run it with ./scriptor path_to_script/script. If you just run it in the terminal, first start bash.
确保使用./script或运行它path_to_script/script。如果您只是在终端中运行它，请先启动bash.
回答by Adrian Frühwirth
bashsupports the -toption for the readbuiltin since version bash-2.04(see ChangeLog), so either you are using an ancient version of bash(<= 2.03) or are not really running your script under bash.
bash支持自版本以来-t的read内置选项bash-2.04（请参阅ChangeLog），因此要么您使用的是bash(<= 2.03)的旧版本，要么没有真正在bash.
Run bash --versionto check the version and double-check that your shebang really looks like #!/bin/bashin your script.
运行bash --version以检查版本并仔细检查您的 shebang 是否真的#!/bin/bash在您的脚本中看起来像。
