普通U盘及多分区U盘的自动挂载【转】

原文：https://www.cnblogs.com/lifexy/p/10107310.html
上篇博客只是讲解了普通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

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