Automatically mount removable media - Revision history

JulienB: /* Default case */

2014-09-17T18:43:57Z

‎Default case

JulienB: /* Default case */

2014-09-17T18:42:57Z

‎Default case

JulienB: /* Default case */

2014-09-17T16:58:26Z

‎Default case

JulienB at 12:16, 17 February 2012

2012-02-17T12:16:23Z

JulienB: /* Other cases */

2012-02-16T18:47:35Z

‎Other cases

JulienB: /* Links */

2012-02-16T18:46:24Z

‎Links

JulienB: /* Default case */

2012-02-16T18:40:25Z

‎Default case

JulienB: /* Default case */

2012-02-16T18:27:27Z

‎Default case

JulienB: /* Default case */

2012-02-16T18:26:41Z

‎Default case

JulienB: /* Default case */

2012-02-16T18:05:05Z

‎Default case

@@ Line 1: / Line 1: @@
 When using USB key or MMC/SD in a final application, it could be useful if these media were automatically mount when inserted by the user. We will explain you how to implement this behaviour in this tutorial.
-==Default case==
+==Default case (mdev)==
 * If you are using default armadeus rootfs, hotplugging is handled by an application called ''mdev''. This can be easily checked with:
 <pre class="apf">

@@ Line 69: / Line 69: @@
 </pre>
-* As we now use /media to create dynamic mount points we will move it from FLASH to RAM by using a tmpfs mount. Take your favorite editro again and edit /etc/fstab file to add it the following line at the end:
+* As we now use ''/media'' to create dynamic mount points we will move it from FLASH to RAM by using a tmpfs mount. Take your favorite editor again and edit ''/etc/fstab'' file to add it the following line:
 <source lang="diff">
 ...
@@ Line 76: / Line 76: @@
 </source>
+:
-* then reboot and everything should now work :-). For example when plugging a MMC/SD you will get:
+* Then, reboot and everything should now work :-). For example when plugging a MMC/SD you will get:
 <pre class="apf">
 # mmc0: host does not support reading read-only switch. assuming write-enable.
@@ Line 94: / Line 94: @@
 </pre>
-* Don't forget that if you want to remove your device, you will have to manually umount it before:
+* Don't forget that if you want to remove your device, you will have to manually umount it before. Example for a MMC/SD:
 <pre class="apf">
 # umount /media/mmcblk0p1

@@ Line 20: / Line 20: @@
 </source>
-* this way mdev will call a script named ''/lib/mdev/automount.sh'' each time a USB drive or an MMC/SD, with a recognized partition table, is plugged in.
+* this way ''mdev'' will call a script named ''/lib/mdev/automount.sh'' each time a USB drive or an MMC/SD (with a recognized partition table) is plugged in.
 * create directory ''/lib/mdev''
 <pre class="apf">

@@ Line 16: / Line 16: @@
 +sd[a-z]          0:6     660
 +mmcblk[0-9]     0:6     660
-+sd[a-z][0-9]      0:6     660 */etc/hotplug/automounter.sh
++sd[a-z][0-9]      0:6     660 */lib/mdev/automounter.sh
-+mmcblk[0-9]p[0-9] 0:6     660 */etc/hotplug/automounter.sh
++mmcblk[0-9]p[0-9] 0:6     660 */lib/mdev/automounter.sh
 </source>
-* this way mdev will call a script named ''/etc/hotplug/automount.sh'' each time a USB drive or an MMC/SD, with a recognized partition table, is plugged in.
+* this way mdev will call a script named ''/lib/mdev/automount.sh'' each time a USB drive or an MMC/SD, with a recognized partition table, is plugged in.
-* create directory ''/etc/hotplug''
+* create directory ''/lib/mdev''
 <pre class="apf">
-# mkdir /etc/hotplug
+# mkdir /lib/mdev
 </pre>
-*then we will have to write what this script is going to do. So take your favorite editor and fill ''/etc/hotplug/automounter.sh'' with:
+*then we will have to write what this script is going to do. So take your favorite editor and fill ''/lib/mdev/automounter.sh'' with:
 <pre class="apf">
-# vi /etc/hotplug/automounter.sh
+# vi /lib/mdev/automounter.sh
 </pre>
@@ Line 66: / Line 66: @@
 </source>
 <pre class="apf">
-# chmod a+x /etc/hotplug/automounter.sh
+# chmod a+x /lib/mdev/automounter.sh
 </pre>

@@ Line 101: / Line 101: @@
 ==Other cases==
 * well... in that cases I suppose you know what you're doing !:-)
-* if using udev instead of mdev for example, then you will have to activate correspondign Buildroot packages (eg usbmount)
+* if using udev instead of mdev for example, then you will have to activate corresponding Buildroot packages (eg usbmount)
 ==Links==
 * http://lists.busybox.net/pipermail/buildroot/2011-August/045187.html
 * http://linux.die.net/man/8/hotplug

← Older revision		Revision as of 18:46, 16 February 2012
Line 105:		Line 105:
	==Links==		==Links==
	* http://lists.busybox.net/pipermail/buildroot/2011-August/045187.html		* http://lists.busybox.net/pipermail/buildroot/2011-August/045187.html
		+	* http://linux.die.net/man/8/hotplug

@@ Line 8: / Line 8: @@
 </pre>
-* It means that each time Linux kernel detect a new device it will call ''/sbin/mdev'' program with specific paramaeters.
+* It means that each time Linux kernel detect a new device it will call ''/sbin/mdev'' program with specific parameters.
 * You can configure mdev with its config file: ''/etc/mdev.conf''. To add automatic mount of USB and SD/MMC devices you can apply the following changes (- -> remove line, + -> add line) in the configuration file:
 <source lang="diff">
@@ Line 14: / Line 14: @@
 -sd[a-z].*       0:6     660
 -mmcblk[0-9].*   0:6     660
-+sd[a-z]*          0:6     660
++sd[a-z]          0:6     660
-+mmcblk[0-9]*     0:6     660
++mmcblk[0-9]     0:6     660
 +sd[a-z][0-9]      0:6     660 */etc/hotplug/automounter.sh
 +mmcblk[0-9]p[0-9] 0:6     660 */etc/hotplug/automounter.sh
 </source>
-* this way mdev will called a script named ''/etc/hotplug/automount.sh'' each time a USB drive or an MMC/SD is plugged with a recognised partition table is plugged in.
+* this way mdev will call a script named ''/etc/hotplug/automount.sh'' each time a USB drive or an MMC/SD, with a recognized partition table, is plugged in.
-* Now we have to write what this script will have to do. So take your favorite editor and fill ''/etc/hotplug/automounter.sh'' with:
+* create directory ''/etc/hotplug''
 <pre class="apf">
-mkdir /etc/hotplug
+# mkdir /etc/hotplug
-vi /etc/hotplug/automounter.sh
+</pre>
 </pre>
@@ Line 32: / Line 35: @@
 destdir=/media
-eumount()
+my_umount()
+{
 	if grep -qs "^/dev/$1 " /proc/mounts ; then
@@ Line 41: / Line 44: @@
+}
-emount()
+my_mount()
+{
 	mkdir -p "${destdir}/$1" || exit 1
@@ Line 54: / Line 57: @@
 case "${ACTION}" in
 add|"")
-	eumount ${MDEV}
+	my_umount ${MDEV}
-	emount ${MDEV}
+	my_mount ${MDEV}
 	;;
 remove)
-	eumount ${MDEV}
+	my_umount ${MDEV}
 	;;
 esac
@@ Line 64: / Line 67: @@
 <pre class="apf">
 # chmod a+x /etc/hotplug/automounter.sh
 </pre>
@@ Line 91: / Line 93: @@
 /dev/mmcblk0p1 on /media/mmcblk0p1 type vfat (rw,sync,fmask=0000,dmask=0000,allow_utime=0022,codepage=cp437,iocharset=iso8859-1)
 </pre>
 ==Links==
 * http://lists.busybox.net/pipermail/buildroot/2011-August/045187.html