在嵌入式Linux上自动挂载插入的USB磁盘和SD/TF卡
笔者使用的是iTop-4412和iTop-4418核心板，挂载了Qt/E的Linux文件系统
编译BusyBox
iTop-4418和iTop-4412的Qt/E文件系统已原生支持mdev，无需重新编译BusyBox的以下支持：
Linux System Utilities --->
[*] mdev
[*] Support /etc/mdev.conf
[*] Support command execution at device addition/removal
创建脚本
以下操作均把Qt/E文件系统所在的目录视为根目录。
USB磁盘
创建/etc/hotplug/目录，创建usbdisk文件，赋予执行权限，写入以下内容：
#!/bin/sh
#Judge device action variable ($ACTION)
if [ $ACTION == "add" ]
then
#Device plugged operations
echo "Hotplug: USB disk $MDEV plugged." > /dev/console
if [ -e "/dev/$MDEV" ] ; then
mkdir -p /mnt/$MDEV
mount -rw /dev/$MDEV /mnt/$MDEV
echo "Hotplug: USB disk $MDEV mounted to /mnt/$MDEV ." > /dev/console
fi
else
#Device unplugged operations
echo "Hotplug: USB disk $MDEV unplugged. Unmounting /mnt/$MDEV ..." > /dev/console
umount /mnt/$MDEV
rm -r /mnt/$MDEV
fi
SD卡
创建/etc/hotplug/目录，创建sdcard文件，赋予执行权限，写入以下内容：
#!/bin/sh
#Judge device action variable ($ACTION)
if [ $ACTION == "add" ]
then
#Device plugged operations
echo "Hotplug: USB disk $MDEV plugged." > /dev/console
if [ -e "/dev/$MDEV" ] ; then
mkdir -p /mnt/$MDEV
mount -rw /dev/$MDEV /mnt/$MDEV
echo "Hotplug: SD card $MDEV mounted to /mnt/$MDEV ." > /dev/console
fi
else
#Device unplugged operations
echo "Hotplug: USB disk $MDEV unplugged. Unmounting /mnt/$MDEV ..." > /dev/console
umount /mnt/$MDEV
rm -r /mnt/$MDEV
fi
编辑mdev.conf
编辑Qt/E文件系统的/etc/mdev.conf，删除：
# misc devices
mmcblk0p1 0:0 0600 =sdcard */bin/hotplug
sda1 0:0 0600 =udisk * /bin/hotplug
文件末尾添加：
# USB disk
sd[a-z][0-9] 0:0 666 * /etc/hotplug/usbdisk
# SD card
mmcblk1p[0-9] 0:0 666 * /etc/hotplug/sdcard
参考资料
页面版本: 2, 最后编辑于: 10 Mar 2022 14:20
