33.Linux-实现U盘自动挂载(详解)

在上章学习33.linux-实现u盘自动挂载(详解)后,只是讲解了普通u盘挂载,并没有涉及到多分区u盘,接下来本章来继续学习

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1.多分区u盘和普通u盘区别

• 1)u盘插上只会创建一个/dev/sda文件,这种一般表示该u盘没有分区,这个sda文件便代表该u盘总大小,我们只需要挂载/dev/sda即可
• 2)另一种u盘则会创建/dev/sda以及/dev/sda1文件,这种一般表示该u盘只有一个分区sda1,我们只需要挂载/dev/sda1即可
• 3)最后一种u盘则是多分区情况,会创建/dev/sda,/dev/sda1,/dev/sda2... .../dev/sdan等,这种表示该u盘有sda1~sdan多个分区,我们需要挂载/dev/sda1~sdan才行

 

2.接下来重新修改/etc/mdev.conf文件

sd[a-z] 0:0 660 * if [ $action = "add" ]; then /etc/hotplug/usb/udisk_insert.sh; else /etc/hotplug/usb/udisk_remove.sh; fi
sd[a-z][1-9]+ 0:0 660 * if [ $action = "add" ]; then /etc/hotplug/usb/udisk_insert1.sh; else /etc/hotplug/usb/udisk_remove.sh; fi

上面表示:

• 当出现/dev/sda时,则会调用/etc/hotplug/usb/udisk_insert.sh,当移除/dev/sda时,则会调用/etc/hotplug/usb/udisk_remove.sh
• 当出现/dev/sda1~9时,则会调用/etc/hotplug/usb/udisk_insert1.sh,当移除/dev/sda1~9时,则会调用/etc/hotplug/usb/udisk_remove.sh

 

3.添加/etc/hotplug/usb/udisk_insert.sh文件

#!/bin/sh

mount_point=/mnt/usbdisk

if [ ! -f $mdev ]; then
    if [ ! -d $mount_point ]; then   #判断挂载目录是否存在
           mkdir -p $mount_point    
fi

echo "${mdev}  usb insert"
sleep 0.5                           #延时500ms,判断一下是否有sda1,如果没有,则表示没有分区

if [!  -e "/dev/sda1"]; then        #如果有/dev/sda1,则属于多分区u盘,所以不需要再挂载/dev/sda了    
          echo " ${mdev} don't have to create " > /dev/console
          exit
fi

echo "create usb disk mount point: $mount_point." > /dev/console

mount -t vfat,exfat,ntfs    /dev/$mdev $mount_point
   if [ $? -ne 0 ]; then
        echo "mount usb disk ${mdev} falied!" > /dev/console
   else
        echo "mount usb disk successfully!" > /dev/console
   fi
fi

注意: 由于/dev/sda文件最先创建,所以上面需要延时500ms后,判断是否有/dev/sda1,来区别是否是多分区

 

4.添加/etc/hotplug/usb/udisk_insert1.sh文件

#!/bin/sh

point_source=/mnt/usbdisk
num=${mdev#*sda}                         #获取sda后缀数字

mount_point=${point_source}${num}

if [ ! -f $mdev ]; then
        if [ ! -d $mount_point ]; then
                mkdir -p $mount_point
fi

echo "${mdev}  usb insert1"
echo "create usb disk mount point: $mount_point." > /dev/console

mount -t vfat,exfat,ntfs    /dev/$mdev $mount_point
        if [ $? -ne 0 ]; then
                echo "mount usb disk ${mdev} falied!" > /dev/console

        else
                echo "mount usb disk successfully!" > /dev/console
        fi
fi
    

 

5.添加/etc/hotplug/usb/udisk_remove.sh文件

#!/bin/sh
point_source=/mnt/usbdisk
num=${mdev#*sda}
mount_point=${point_source}${num}

umount $mount_point
if [ $? -ne 0 ]; then
    echo "umount usb disk falied!    ${mdev} " > /dev/console
else
    echo "umount usb disk successfully!" > /dev/console
fi

rm -rf $mount_point
echo "remove usb disk mount point: $mount_point." > /dev/console