bash 整数比较总是返回 true？

Question

我有以下简单的 bash 脚本。由于某种原因，它总是返回 true。

#!/bin/bash
service=hhvm
status=($(ps -ef | grep -v grep | grep $service | wc -l))
if [[ $status -eq 0 ]]; then
    echo "starting $service"
    service hhvm start
else
    echo "$service running"
fi

Answer 1

最终有效的脚本。在聊天中

#!/bin/bash
service=hhvm
if ! (($(ps -ef | grep -v "grep"| grep "$service" | wc -l))) ; then
    echo "starting $service"
    service hhvm start
else
    echo "$service is running"
fi

Answer 2

foo=3
if [[ $foo -eq 0 ]]; then     # -eq: equal
  echo "foo equals 0"
else
  echo "foo is not equal to 0"
fi