linux 判断当前用户是否是root

linux 中，如何判断当前用户是否是root 呢？
判断当前用户是否是root

复制代码

代码如下:

#---------------------------- root user check ---------------------start
if [ `id -u` -ne 0 ]; then
echo "please re-run ${this_file} as root."
exit 1
fi
#---------------------------- root user check ---------------------end
if [ x"$user" = x"" ];then
if id |grep "^uid=0(root)">/dev/null ;then
:
else
echo "please rerun `basename $0` as root ."
exit 1
fi
else
if [ ! x"$user" = x"root" ];then
echo "please rerun `basename $0` as root ."
exit 1
fi
fi
#=============== check current user start ================
if [ ! $user = root ];then
echo "please rerun this script as root ."
exit 1
fi
#=============== check current user end ================
#!/bin/sh
if id |grep "^uid=0(root)">/dev/null ;then
echo is root
else
echo not root
fi
check_user(){
if [ $uid -ne 0 ];then
echo "current user is not root."
echo "please rerun the installer as root user."
exit 11
fi
}