之前有分析过mdev，这次富林写了一个demo，跟一下，不过呢，在过之后觉得，需要优化，后面提供了一种兼容eMMC、SD、U盘、SATA自动挂载的方式，在功能上可以进步的进行优化。
/*********************************************************************
* mdev USB disk auto mount demo
* 说明：
* 之前有分析过mdev，这次富林写了一个demo，跟一下，不过呢，在看过之后
* 觉得，需要优化，后面提供了一种兼容eMMC、SD、U盘、SATA自动挂载的方式，
* 在功能上可以进步的进行优化，其中的eMMC、SD卡功能需要加强区分，这份脚本
* 中没有进一步识别区分，这份参考来自参考文档第二点链接。
*
* 2017-8-21 深圳 龙华樟坑村 曾剑锋
********************************************************************/
一、参考文档：
1. MDEV Primer
http://www.cnblogs.com/zengjfgit/p/5133307.html
2. [Linux] Auto mount 自動掛載 usb disk & SD card
http://www.awaysu.acsite.org/linux/linux-auto-mount-usb-disk-sd-card/
3. SD card automount for Embedded Linux
http://infosoure.blogspot.com/2011/04/sd-card-automount-for-embedded-linux.html
4. How to mount removable media in /media/<LABEL> automatically when inserted, without any desktop environment?
https://unix.stackexchange.com/questions/44454/how-to-mount-removable-media-in-media-label-automatically-when-inserted-with
二、代码阅读：
1. /etc/mdev.conf
...
sda1 0:0 0660 @/etc/usb_disk1_insert
sda 0:0 0660 $/etc/usb_disk1_remove
sdb1 0:0 0660 @/etc/usb_disk2_insert
sdb 0:0 0660 $/etc/usb_disk2_remove
...
2. /etc/usb_disk1_insert
#!/bin/sh
if [ ! -e /media/sda1 ]; then
mkdir /media/sda1 -p
fi
mount -t vfat /dev/sda1 /media/sda1
3. /etc/usb_disk1_remove
#!/bin/sh
umount /media/sda1
if [ -d /media/sda1 ]; then
rm /media/sda1 -rf
fi
4. /etc/usb_disk2_insert
#!/bin/sh
if [ ! -e /media/sdb1 ]; then
mkdir /media/sdb1 -p
fi
mount -t vfat /dev/sdb1 /media/sdb1
5. /etc/usb_disk2_remove
#!/bin/sh
umount /media/sdb1
if [ -d /media/sdb1 ]; then
rm /media/sdb1 -rf
fi
三、更好的处理方式：
1. /etc/mdev.conf
...
sd[a-z][0-9] 0:0 600 *(/etc/init.d/automount.sh $MDEV &)
mmcblk0p[0-9] 0:0 600 *(/etc/init.d/automount.sh $MDEV &)
...
2. /etc/init.d/automount.sh
#!/bin/sh
# 挂载路径
MOUNT_PATH=""
# 信息输出串口
MSG_PATH="/dev/ttyS0"
# 设备节点为空检查，退出
if [ $1 == "" ]; then
echo "[AutoMount] automount.sh parameter is none" > $MSG_PATH
exit 0
# eMMC或者SD卡挂载
elif [ $1 == "mmcblk0p1" ]; then
MOUNT_PATH="/mnt/sdcard"
# 其他类型的盘挂载
else
name=$1
check=${name%[1-9]}
vendor=`cat /sys/block/$check/device/vendor`
# SATA挂载
if [ $vendor == "ATA" ]; then
MOUNT_PATH="/mnt/hdd/"$name
# U盘挂载
else
MOUNT_PATH="/mnt/usb/"$name
fi
fi
# 将挂载点信息输出到串口
echo "[AutoMount] mount path : $MOUNT_PATH" >> $MSG_PATH
# 获取当前需要挂载、卸载的分区格式
FORMAT=`/sbin/fdisk -l | grep $1`
# 查看是否已经有挂载设备了，如果已经挂载，那当前次就要卸载
OLD_MOUNT_PATH=`mount | grep $MOUNT_PATH`
# 未挂载，那么当前次就是需要进行挂载
if [ "$OLD_MOUNT_PATH" == "" ]; then
# 如果挂载点不存在，那么就自动创建挂载点
if [ ! -x $MOUNT_PATH ]; then
mkdir -p $MOUNT_PATH
fi
# 针对格式进行挂载
for token in $FORMAT
do
if [ $token == "FAT32" ]; then
mount -t vfat /dev/$1 $MOUNT_PATH
echo "[AutoMount] mount -t vfat /dev/$1 $MOUNT_PATH" > $MSG_PATH
elif [ $token == "FAT16" ]; then
mount -t vfat /dev/$1 $MOUNT_PATH
echo "[AutoMount] mount -t vfat /dev/$1 $MOUNT_PATH" > $MSG_PATH
elif [ $token == "HPFS/NTFS" ]; then
if [ -f /usr/app/ntfs-3g ]; then
echo "[AutoMount] /usr/app/ntfs-3g /dev/"$1" "$MOUNT_PATH > /var/log/automount/mount.log
export LD_LIBRARY_PATH=/lib/:${LD_LIBRARY_PATH}
/usr/app/ntfs-3g /dev/$1 $MOUNT_PATH
echo "[AutoMount] /usr/app/ntfs-3g /dev/$1 $MOUNT_PATH" > $MSG_PATH
else
mount -t ntfs /dev/$1 $MOUNT_PATH
echo "[AutoMount] mount -t ntfs /dev/$1 $MOUNT_PATH" > $MSG_PATH
fi
# 没有针对的格式，直接进行挂载
elif [ $token == "Linux" ]; then
mount /dev/$1 $MOUNT_PATH
echo "[AutoMount] mount /dev/$1 $MOUNT_PATH" > $MSG_PATH
fi
done
# 自动卸载
else
umount $MOUNT_PATH
echo "[AutoMount] umount "$MOUNT_PATH > $MSG_PATH
fi
3. 插入U盘，输出信息：
[rootzengjf init.d]# [ 1233.252058] usb 1-1.2: new high-speed USB device number 5 using musb-hdrc
[ 1233.372824] usb 1-1.2: New USB device found, idVendor=0781, idProduct=556b
[ 1233.380358] usb 1-1.2: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[ 1233.388402] usb 1-1.2: Product: Cruzer Edge
[ 1233.393128] usb 1-1.2: Manufacturer: SanDisk
[ 1233.397922] usb 1-1.2: SerialNumber: 2005395413192CA2C0DB
[ 1233.411004] usb-storage 1-1.2:1.0: USB Mass Storage device detected
[ 1233.450259] scsi host2: usb-storage 1-1.2:1.0
[ 1234.455868] scsi 2:0:0:0: Direct-Access SanDisk Cruzer Edge 1.27 PQ: 0 ANSI: 6
[ 1234.476271] sd 2:0:0:0: [sdc] 15431338 512-byte logical blocks: (7.90 GB/7.36 GiB)
[ 1234.523098] sd 2:0:0:0: [sdc] Write Protect is off
[ 1234.548813] sd 2:0:0:0: [sdc] Write cache: disabled, read cache: enabled, doesn't support DPO or FUA
[ 1234.603919] sdc: sdc1
[ 1234.625862] sd 2:0:0:0: [sdc] Attached SCSI removable disk
[AutoMount] mount path : /mnt/usb/sdc1
[ 1234.922506] FAT-fs (sdc1): Volume was not properly unmounted. Some data may be corrupt. Please run fsck.
[AutoMount] mount -t vfat /dev/sdc1 /mnt/usb/sdc1
