Question

我有一个mount脚本，当Python命令输出中包含字符时，我需要运行一个命令，如果输出为空，则运行其他东西。

示例：

## define a function that launched the zenity username dialog
get_username(){
    zenity --entry --width=300 --title="Mount $MOUNTDIR" --text="Username:"
}
# define a function that launched the zenity password dialog
get_password(){
    zenity --entry --width=300 --title="Mount $MOUNTDIR" --text="Password:" --hide-text
}

# attempt to get the username and exit if cancel was pressed.
wUsername=$(get_username) || exit

# if the username is empty or matches only whitespace.
while [ "$(expr match "$wUsername" '.')" -lt "1" ]; do
    zenity --error --title="Error in username!" --text="Please check your username! Username field can not be empty!"  || exit
    wUsername=$(get_username) || exit
done

wPassword=$(get_password) || exit

while [ "$(expr match "$wPassword" '.')" -lt "1" ]; do
    zenity --error --title="Error in password!" --text="Please check your password! Password field can not be empty!" || exit
    wPassword=$(get_password) || exit
done

Save_pwd=$(python -c "import keyring; keyring.set_password('My namespace', 'wUsername', '$wPassword')")

Get_wPassword=$(python -c "import keyring; keyring.get_password('My namespace', '$wUsername')")

echo $Get_wPassword
# mount windows share to mountpoint
#sudo mount -t cifs //$SERVER/$SHARE ${HOME}/${DIRNAME} -o username=${wUsername},password=${Get_wPassword},domain=${DOMAIN}

# show if mounting was OK or failed
#if [ $? -eq 0 ]; then
#       zenity --info --title="Mounting public share succeeded!" --text="Location Documents/Shares/public!"
#else
#       zenity --error --title="Mounting public did not succed!" --text="Please contact system administrator!"
#fi

现在在这个脚本中我需要先运行zenity用户名输入。一旦运行，Python $ Get_wPassword 将运行，一旦它提供非空的输出，它将运行mount命令，其用户名和密码来自 $ Get_wPassword 即可。如果 $ Get_wPassword 为空，那么我需要使用 $ Save_pwd 和mount命令运行密码输入，以便将密码保存到密钥环中脚本运行的时间从那里获取密码。

我怎样才能做到这一点？使用 while 循环？如果是的话，你能举一些例子吗？我是脚本新手。

Answer 1

据我了解，如果名为Get_wPassword的shell变量为非空，则需要一些命令，如果为空，则需要另一个命令。幸运的是，对于空字符串有一个简单的shell测试：

if [ -n "$Get_wPassword" ]
then
    CommandIfNotEmpty
else
    CommandIfEmpty
fi

如果[ -n somestring ]具有非零长度，则构造somestring返回true，如果字符串为空，则返回false。有关详细信息，请参阅man bash。

猜测你真正想做的事情，考虑一下：

if [ -n "$Get_wPassword" ]
then
    if sudo mount -t cifs //$SERVER/$SHARE ${HOME}/${DIRNAME} -o username=${wUsername},password=${Get_wPassword},domain=${DOMAIN}
    then
        zenity --info --title="Mounting public share succeeded!" --text="Location Documents/Shares/public!"
    else
        zenity --error --title="Mounting public did not succed!" --text="Please contact system administrator!"
    fi
else
    echo "Password was empty..."
fi

如果输出有字符，我需要运行bash命令，如果输出为空，我需要运行其他命令

1 个答案: