Bash - “fi ;;”有什么用？
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Bash - what's the use of "fi ;;"?
提问by Roger
I have been searching everywhere for an explanation. Here's a real example taken from the apt-fast.sh script:
我一直在到处寻找解释。这是一个取自 apt-fast.sh 脚本的真实示例：
if [ ! -x /usr/bin/axel ]
then echo "axel is not installed, perform this?(y/n)"
read ops
case $ops in
y) if apt-get install axel -y --force-yes
then echo "axel installed"
else echo "unable to install the axel. you are using sudo?" ; exit
fi ;;
n) echo "not possible usage apt-fast" ; exit ;;
esac
fi
What's the use of "fi ;;"in the middle of the ifblock?
块"fi ;;"中间有什么用if？
回答by Nicola Musatti
ficloses the ifstatement, while ;;closes the current entry in the casestatement.
fi关闭if语句，同时;;关闭语句中的当前条目case。
回答by Manny D
The fiis to close the if-block in the y)case statement and the ;;is used to end the y)case.
该fi是关闭，如果块中的y)case语句和;;用于结束的y)情况下。
回答by glglgl
fiterminates the preceding if, while ;;terminates the y)case in the case...esac.
fi终止前面的if，而;;终止 中的y)情况case...esac。
回答by hughes
ficloses the ifstatement opened 3 lines up. ;;closes the case opened by y).
fi关闭if语句打开 3 行。;;关闭由打开的案例y)。
