Implementation of auto-mount on embedded Linux under U-disk __linux

implementation of embedded Linux under U-disk automatic mounting One, method one

Because I am debugging the system is based on LSDK, so can not directly use the HotPlug in OpenWrt to complete this function. So the following methods are used.

The way I realized it was simple, the main is the cycle of reading file/proc/partitions file, when you insert, the file will have U disk information: "SDB1, SDB2" and so on, when the system detects this information, execute the command mount, the U disk mounted to the file system. You can open a thread in your application to read a file periodically/proc/partition

I implemented the method is very simple, mainly is the cycle read file/proc/partitions file, when you insert the disk, the file will have U disk information: "SDB1, SDB2," and so on,

When the system detects this information, it executes a command mount and mounts the U disk to the file system.

You can open a thread cycle in your application to read file/proc/partitions files, and to automatically mount your internship files.

This is simply a U-disk automatic mount, you can also use HotPlug to achieve the automatic Mount U disk.

Two, method two

Here's how to use Mdev on the Web:

Under Arm Embedded Linux, to let U disk automatically mount, you can use the Mdev way to achieve (Mdev is a busybox in a Udev management program of a compact version, it can achieve the automatic device node creation and equipment mount automatically), the following is the steps to achieve: 1, Confirm that BusyBox does the root file system with the following options selected: Linux system utilities-> [*] Mdev
[*] Support/etc/mdev.conf
[*]         Support command execution at Device Addition/removal 2, to determine HOTPLUG because it is a config_hotplug=y feature that utilizes the Linux kernel. 3, modify the root file system inside the Etc/init.d/rcs file, add the following: Mount-t tmpfs mdev/dev mount-t Sysfs Sysfs/sys Ir/dev/pts mount-t devpts devpts/dev/pts
        # Mdev For/dev          Echo/sbin/mdev >/proc/sys/kernel/hotplug         mdev-s          echo "***************starting mdev ..... [OK] "     4, add the corresponding to hot plug events, support U disk automatic mount:          Modify the etc/mdev.conf file in the root file system as follows:         sd[a-z][0-9]         0:0 666            @/etc/mdev/udisk_insert       & nbsp                            & nbsp            sd[a-z]                0 : 0 666            $/etc/mdev/udisk_remove         &NBsp    Note: @ Indicates that the following script is executed after inserting (creating the device node), and $ indicates that the following              is executed before unplugging (removing the device node)        Scripts.         5, adding corresponding script files:           the etc/mdev/in the root file system Udisk_insert file content:              #!/bin/sh              if [-d/sys/block/*/$MDEV]; Then               mkdir-p/media/$MDEV         &NB Sp     mount/dev/mdev/media/mdev/media/mdev-t vfat-o utf8=1           &nbs p;  fi              root file system Etc/mdev/udisk_remove file contents:      & nbsp       #!/bin/sh              umount-l/media/$MDEV   &NB Sp          rm-rf/media/$MDEV         At this point, you can implement automatic Plug and pull mount