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kENNy_
n00b
Joined: 06 Dec 2002
Posts: 45
Location: Hannover/Germany
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 Posted: Mon Oct 04, 2004 11:13 pm Post subject: HOWTO: hotpluging usbstick automounting |
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Hi,
I spend some time in automounting usb-sticks.
I'm using udev and hotpluging
for automounting create a bash script "usb-storage"
in the directory /etc/hotplug/usb/
| Code: | #!/bin/sh
source /etc/profile
N=0
while [ 100 -gt $N ] ; do
if [ -e /dev/sda1 ]; then
N=100
fi
sleep 1
N=$(( $N + 1 ))
done
/usr/bin/logger "mount -t vfat -o sync,umask=0 /dev/sda1 /mnt/usb"
mkdir -p /mnt/usb
mount -t vfat -o sync,umask=0 /dev/sda1 /mnt/usb |
This script will try for 100 seconds to mount /dev/sda1 to /mnt/usb
make this script executable
| Code: | | chmod a+x /etc/hotplug/usb/usb-storage |
next create an unmount script "usb-storage-remove" in the same directory /etc/hotplug/usb/
| Code: | #!/bin/sh
/usr/bin/logger "umount /mnt/usb"
/bin/fuser -m -k /mnt/usb/
sleep 3
/bin/umount /mnt/usb |
this script will kill all processes that access /mnt/usb after unplugging the usbstick
make this script executable
| Code: | | chmod a+x /etc/hotplug/usb/usb-storage-remove |
test it, and watch your syslog...
have fun with this 
kENNy |
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servilvo
n00b
Joined: 29 Apr 2004
Posts: 3
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| Posted: Mon Oct 04, 2004 11:41 pm Post subject: |
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Hi, guys.
I make it this script also. Try it.
You have to put the next script "usb-storage"
in the directory /etc/hotplug/usb/
and make it executable chmod +x usb-storage
| Code: | #!/bin/bash
#wait for logging messages
sleep 2
tail /var/log/messages -n11 > /tmp/usblog
DEVICE=`cat /tmp/usblog |grep sd | tail -n2 |head -n1 |cut -d ":" -f4 |cut -d " " -f2`
MOUNTDEV="/dev/$DEVICE"
NAMEDEV=`cat /tmp/usblog |grep Model |cut -d ":" -f 5|awk -F" " 'OFS="_"{$NF=""; print}'|sed -e "s/_$//g"`
MOUNTPOINT="/mnt/$NAMEDEV"
MOUNTOWNER=root
MOUNTGROUP=users
FESTIVALNAMEDEV=`cat /tmp/usblog |grep Model |cut -d ":" -f 5|awk -F" " '{$NF=""; print}'`
echo "Found a new U.S.B camera or disk which name is $FESTIVALNAMEDEV" | aoss festival --tts - &
#wait for the dev/sd* to be created
for I in 1 2 3 4 5 6 7 8 9 10 11 12 13
do
if [ -e /dev/$DEVICE ]
then
logger "`basename $0`: $I s to found $MOUNTDEV "
break
fi
sleep 1
done
if [ -e /dev/$DEVICE ]
then
logger "`basename $0`: Mounting $NAMEDEV at $MOUNTPOINT "
else
logger "`basename $0`: ERROR $MOUNTDEV not found "
exit
fi
aplay /usr/share/sounds/k3b_wait_media1.wav
#make fstab
FS=vfat
OPTIONS="users,uid=$MOUNTOWNER,gid=$MOUNTGROUP,sync,umask=007"
MOUNTCMD="$MOUNTDEV $MOUNTPOINT -t $FS -o $OPTIONS"
FSTABENTRY="$MOUNTDEV $MOUNTPOINT $FS noauto,$OPTIONS 0 0"
cat /etc/fstab | grep "$FSTABENTRY" > /dev/null || echo "$FSTABENTRY # $REMOVER" >> /etc/fstab
#automount usb-disk
mkdir $MOUNTPOINT
mount $MOUNTPOINT
#creating REMOVER
echo "#!/bin/bash" > $REMOVER
echo "echo \"Removing U.S.B camera or disk which name is $FESTIVALNAMEDEV \" | aoss festival --tts - & " >> $REMOVER
echo "rm -f /etc/fstab.usbremover" >> $REMOVER
echo "/bin/umount $MOUNTPOINT" >> $REMOVER
echo "/bin/cat /etc/fstab | /bin/grep -v \"$REMOVER\" > /etc/fstab.usbremover" >> $REMOVER
echo "test -f /etc/fstab.old && rm /etc/fstab.old" >> $REMOVER
echo "mv /etc/fstab /etc/fstab.old " >> $REMOVER
echo "mv /etc/fstab.usbremover /etc/fstab " >> $REMOVER
echo "rmdir $MOUNTPOINT" >> $REMOVER
chmod +x $REMOVER |
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codergeek42
Bodhisattva
Joined: 05 Apr 2004
Posts: 5142
Location: Anaheim, CA (USA)
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| Posted: Tue Oct 05, 2004 12:05 am Post subject: |
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Not to sound condescending or anything, but isn't this what the HAL/dbus/{ivman,gnome-volume-manager} combo was meant to do but in a device-independent way?
_________________
~~ Peter: Programmer, Mathematician, STEM & Free Software Advocate, Enlightened Agent, Transhumanist, Fedora contributor
Who am I? :: EFF & FSF |
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Twink
Apprentice
Joined: 06 Dec 2002
Posts: 178
Location: New Zealand
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| Posted: Tue Oct 05, 2004 6:39 am Post subject: |
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| codergeek42 wrote: | | Not to sound condescending or anything, but isn't this what the HAL/dbus/{ivman,gnome-volume-manager} combo was meant to do but in a device-independent way? |
Actually last I checked ivman doesn't support usb sticks yet. |
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Naib
Watchman
Joined: 21 May 2004
Posts: 5785
Location: Removed by Neddy
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| Posted: Tue Oct 05, 2004 11:05 am Post subject: |
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| codergeek42 wrote: | | Not to sound condescending or anything, but isn't this what the HAL/dbus/{ivman,gnome-volume-manager} combo was meant to do but in a device-independent way? |
and that is all well and good for GNOME2.8, what abt teh rest of us? |
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nevynxxx
Veteran
Joined: 12 Nov 2003
Posts: 1123
Location: Manchester - UK
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| Posted: Tue Oct 05, 2004 11:34 am Post subject: |
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| Naib wrote: | | codergeek42 wrote: | | Not to sound condescending or anything, but isn't this what the HAL/dbus/{ivman,gnome-volume-manager} combo was meant to do but in a device-independent way? |
and that is all well and good for GNOME2.8, what abt teh rest of us? |
Helping to get ivman working?
HAL depends only on DBUS, DBUS depends only on glib ( as far as I know, I run it on a comp without X-windows anyway) and ivman depends only on DBUS and HAL.
Its only the GVM that's gnome dependant.
Ivman is young, if you want the usb stick functionality, contact ikke and help.
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My Public Key
Wanted: Instructor in the art of Bowyery |
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codergeek42
Bodhisattva
Joined: 05 Apr 2004
Posts: 5142
Location: Anaheim, CA (USA)
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| Posted: Tue Oct 05, 2004 2:53 pm Post subject: |
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| Twink wrote: | | codergeek42 wrote: | | Not to sound condescending or anything, but isn't this what the HAL/dbus/{ivman,gnome-volume-manager} combo was meant to do but in a device-independent way? |
Actually last I checked ivman doesn't support usb sticks yet. |
Aha. Thanks for clearing that up for me. 
_________________
~~ Peter: Programmer, Mathematician, STEM & Free Software Advocate, Enlightened Agent, Transhumanist, Fedora contributor
Who am I? :: EFF & FSF |
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Twink
Apprentice
Joined: 06 Dec 2002
Posts: 178
Location: New Zealand
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| Posted: Thu Oct 07, 2004 5:20 am Post subject: |
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| my logs show that the usb device was inserted and detected however the usb-storage script is never run, any ideas? |
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lduperval
Apprentice
Joined: 14 Jun 2003
Posts: 189
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| Posted: Wed Dec 08, 2004 3:46 pm Post subject: |
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After tinkering a bit last nigh, I found out that the usb-storage script was never run. Instead (on 2.6, at least) it tries to run a script that has the name of the kernel module. In my case, it was "ub". So my /etc/hotplug/usb/ub script looks like this:
| Code: |
#!/bin/bash
sleep 2
DEVICE=`/usr/local/bin/usbid2ubdev $PRODUCT`
/usr/bin/logger "Device is $DEVICE"
MOUNTDEV="/dev/$DEVICE"
case "$PRODUCT" in
4cb/16e/100) # Fuji camera
echo "Mounting Fuji camera" | festival --tts - &
MOUNTPOINT="/mnt/camera"
;;
esac
case "$PRODUCT" in
781/7113/2033) # USB stick
echo "Mounting Sandisk USB stick" | festival --tts - &
MOUNTPOINT="/mnt/usbdrive"
;;
esac
MOUNTOWNER=root
MOUNTGROUP=users
#wait for the dev/sd* to be created
for I in 1 2 3 4 5 6 7 8 9 10 11 12 13
do
if [ -e /dev/$DEVICE ]
then
logger "`basename $0`: $I s to found $MOUNTDEV "
break
fi
sleep 1
done
if [ -e /dev/$DEVICE ]
then
logger "`basename $0`: Mounting $NAMEDEV at $MOUNTPOINT "
else
logger "`basename $0`: ERROR $MOUNTDEV not found "
exit
fi
# aplay /usr/share/sounds/k3b_wait_media1.wav
#make fstab
FS=vfat
OPTIONS="users,uid=$MOUNTOWNER,gid=$MOUNTGROUP,sync,umask=007"
MOUNTCMD="$MOUNTDEV $MOUNTPOINT -t $FS -o $OPTIONS"
FSTABENTRY="$MOUNTDEV $MOUNTPOINT $FS noauto,$OPTIONS 0 0"
cat /etc/fstab | grep "$FSTABENTRY" > /dev/null || echo "$FSTABENTRY # $REMOVER" >> /etc/fstab
#automount usb-disk
mkdir $MOUNTPOINT
mount $MOUNTPOINT
#creating REMOVER
echo "#!/bin/bash" > $REMOVER
echo "echo \"Removing U.S.B camera or disk \" | festival --tts - & " >> $REMOVER
echo "rm -f /etc/fstab.usbremover" >> $REMOVER
echo "/bin/umount $MOUNTPOINT" >> $REMOVER
echo "/bin/cat /etc/fstab | /bin/grep -v \"$REMOVER\" > /etc/fstab.usbremover" >> $REMOVER
echo "test -f /etc/fstab.old && rm /etc/fstab.old" >> $REMOVER
echo "mv /etc/fstab /etc/fstab.old " >> $REMOVER
echo "mv /etc/fstab.usbremover /etc/fstab " >> $REMOVER
echo "rmdir $MOUNTPOINT" >> $REMOVER
chmod +x $REMOVER
|
The usbid2ubdev script is a Tcl script (I don't do Perl):
| Code: |
#!/usr/bin/tclsh
if {[llength $argv] != 1} {
puts stderr "Usage: $argv0 <device>"
exit 1
}
if {![regexp {(.*)/(.*)/.*} [lindex $argv 0] -> vendorId productId]} {
puts stderr "Device format should be xxxx/xxxx/xxxx"
exit 2
}
proc padZero {num} {
set pad [expr 4-[string length $num]]
return [string repeat 0 $pad]$num
}
set vendorId [padZero $vendorId]
set productId [padZero $productId]
set deviceFile /proc/bus/usb/devices
set busInfo [split [exec grep "^T:" $deviceFile] \n]
set productInfo [split [exec grep "^P:" $deviceFile] \n]
for {set i 0} {$i < [llength $productInfo]} {incr i} {
if {[string match "*Vendor=$vendorId ProdID=$productId*" [lindex $productInfo $i]]} {
regexp {.*Port=(..)} [lindex $busInfo $i] -> port
if {[string match "00" $port]} {
puts "uba1"
} elseif {[string match "01" $port]} {
puts "ubb1"
} else {
puts stderr "Unknown port for $vendorId/$productId"
exit 3
}
exit
}
}
puts stderr "No match found"
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Veneroso
n00b
Joined: 26 May 2004
Posts: 27
Location: Batavia, New York
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| Posted: Sat Jan 22, 2005 10:44 pm Post subject: |
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This was working for me beautifully until gentoo-dev-sources-2.6.10-r4/6. And if I use the old kernel, is still works.
I guess they changed something. Looks like I have to look into alternatives, oh well. 
The script is still called if the device is plugged in, but REMOVER is not executed if unplugged. Also, hotplug isn't automounting it if it is plugged in at power on.
_________________
All you need is the handyman's secret weapon, duct-tape. |
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rasto
n00b
Joined: 27 Nov 2002
Posts: 43
Location: NJ
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| Posted: Sun Feb 13, 2005 10:00 pm Post subject: |
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| Veneroso wrote: | This was working for me beautifully until gentoo-dev-sources-2.6.10-r4/6. And if I use the old kernel, is still works.
I guess they changed something. Looks like I have to look into alternatives, oh well.
The script is still called if the device is plugged in, but REMOVER is not executed if unplugged. Also, hotplug isn't automounting it if it is plugged in at power on. |
Works for me...
2.6.10-gentoo-r4 sys-apps/hotplug-20040923 sys-fs/udev-045
I had to add this to recognize my usbstick and mount it to /mnt/usbstick
| Code: |
case "$PRODUCT" in
ea0/2168/200) # USB stick
echo "Mounting STF USB stick" | festival --tts - &
MOUNTPOINT="/mnt/usbstick"
FS=msdos
;;
esac
|
because i had to mount my usb stick with fs=msdos i added
| Code: |
if [ -z FS ] ; then
FS=vfat
fi
|
also this was needed to fix creation of $REMOVER script
| Code: |
echo $'#!/bin/bash' > $REMOVER
|
so. now it looks like this.
| Code: |
#!/bin/bash
FS=
sleep 2
DEVICE=`/usr/local/bin/usbid2ubdev $PRODUCT`
/usr/bin/logger "Device is $DEVICE"
MOUNTDEV="/dev/$DEVICE"
case "$PRODUCT" in
4cb/16e/100) # Fuji camera
echo "Mounting Fuji camera" | festival --tts - &
MOUNTPOINT="/mnt/camera"
;;
esac
case "$PRODUCT" in
781/7113/2033) # USB stick
echo "Mounting Sandisk USB stick" | festival --tts - &
MOUNTPOINT="/mnt/usbdrive"
;;
esac
case "$PRODUCT" in
ea0/2168/200) # USB stick
echo "Mounting STF USB stick" | festival --tts - &
MOUNTPOINT="/mnt/usbstick"
FS=msdos
;;
esac
MOUNTOWNER=root
MOUNTGROUP=users
#wait for the dev/sd* to be created
for I in 1 2 3 4 5 6 7 8 9 10 11 12 13
do
if [ -e /dev/$DEVICE ]
then
logger "`basename $0`: $I s to found $MOUNTDEV "
break
fi
sleep 1
done
if [ -e /dev/$DEVICE ]
then
logger "`basename $0`: Mounting $NAMEDEV at $MOUNTPOINT "
else
logger "`basename $0`: ERROR $MOUNTDEV not found "
exit
fi
# aplay /usr/share/sounds/k3b_wait_media1.wav
#make fstab
if [ -z FS ] ; then
FS=vfat
fi
OPTIONS="users,uid=$MOUNTOWNER,gid=$MOUNTGROUP,sync,umask=007"
MOUNTCMD="$MOUNTDEV $MOUNTPOINT -t $FS -o $OPTIONS"
FSTABENTRY="$MOUNTDEV $MOUNTPOINT $FS noauto,$OPTIONS 0 0"
cat /etc/fstab | grep "$FSTABENTRY" > /dev/null || echo "$FSTABENTRY # $REMOVER"
>> /etc/fstab
#automount usb-disk
mkdir $MOUNTPOINT
mount $MOUNTPOINT
#creating REMOVER
echo $'#!/bin/bash' > $REMOVER
echo "echo \"Removing U.S.B camera or disk \" | festival --tts - & " >> $REMOVER
echo "rm -f /etc/fstab.usbremover" >> $REMOVER
echo "/bin/umount $MOUNTPOINT" >> $REMOVER
echo "/bin/cat /etc/fstab | /bin/grep -v \"$REMOVER\" > /etc/fstab.usbremover"
>> $REMOVER
echo "test -f /etc/fstab.old && rm /etc/fstab.old" >> $REMOVER
echo "mv /etc/fstab /etc/fstab.old " >> $REMOVER
echo "mv /etc/fstab.usbremover /etc/fstab " >> $REMOVER
echo "rmdir $MOUNTPOINT" >> $REMOVER
chmod +x $REMOVER
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soya
Guru
Joined: 29 Jan 2004
Posts: 425
|
| Posted: Sun Feb 13, 2005 11:57 pm Post subject: |
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| lduperval wrote: | After tinkering a bit last nigh, I found out that the usb-storage script was never run. Instead (on 2.6, at least) it tries to run a script that has the name of the kernel module. In my case, it was "ub". So my /etc/hotplug/usb/ub script looks like this:
| Code: |
#!/bin/bash
sleep 2
DEVICE=`/usr/local/bin/usbid2ubdev $PRODUCT`
/usr/bin/logger "Device is $DEVICE"
MOUNTDEV="/dev/$DEVICE"
case "$PRODUCT" in
4cb/16e/100) # Fuji camera
echo "Mounting Fuji camera" | festival --tts - &
MOUNTPOINT="/mnt/camera"
;;
esac
case "$PRODUCT" in
781/7113/2033) # USB stick
echo "Mounting Sandisk USB stick" | festival --tts - &
MOUNTPOINT="/mnt/usbdrive"
;;
esac
MOUNTOWNER=root
MOUNTGROUP=users
#wait for the dev/sd* to be created
for I in 1 2 3 4 5 6 7 8 9 10 11 12 13
do
if [ -e /dev/$DEVICE ]
then
logger "`basename $0`: $I s to found $MOUNTDEV "
break
fi
sleep 1
done
if [ -e /dev/$DEVICE ]
then
logger "`basename $0`: Mounting $NAMEDEV at $MOUNTPOINT "
else
logger "`basename $0`: ERROR $MOUNTDEV not found "
exit
fi
# aplay /usr/share/sounds/k3b_wait_media1.wav
#make fstab
FS=vfat
OPTIONS="users,uid=$MOUNTOWNER,gid=$MOUNTGROUP,sync,umask=007"
MOUNTCMD="$MOUNTDEV $MOUNTPOINT -t $FS -o $OPTIONS"
FSTABENTRY="$MOUNTDEV $MOUNTPOINT $FS noauto,$OPTIONS 0 0"
cat /etc/fstab | grep "$FSTABENTRY" > /dev/null || echo "$FSTABENTRY # $REMOVER" >> /etc/fstab
#automount usb-disk
mkdir $MOUNTPOINT
mount $MOUNTPOINT
#creating REMOVER
echo "#!/bin/bash" > $REMOVER
echo "echo \"Removing U.S.B camera or disk \" | festival --tts - & " >> $REMOVER
echo "rm -f /etc/fstab.usbremover" >> $REMOVER
echo "/bin/umount $MOUNTPOINT" >> $REMOVER
echo "/bin/cat /etc/fstab | /bin/grep -v \"$REMOVER\" > /etc/fstab.usbremover" >> $REMOVER
echo "test -f /etc/fstab.old && rm /etc/fstab.old" >> $REMOVER
echo "mv /etc/fstab /etc/fstab.old " >> $REMOVER
echo "mv /etc/fstab.usbremover /etc/fstab " >> $REMOVER
echo "rmdir $MOUNTPOINT" >> $REMOVER
chmod +x $REMOVER
|
The usbid2ubdev script is a Tcl script (I don't do Perl):
| Code: |
#!/usr/bin/tclsh
if {[llength $argv] != 1} {
puts stderr "Usage: $argv0 <device>"
exit 1
}
if {![regexp {(.*)/(.*)/.*} [lindex $argv 0] -> vendorId productId]} {
puts stderr "Device format should be xxxx/xxxx/xxxx"
exit 2
}
proc padZero {num} {
set pad [expr 4-[string length $num]]
return [string repeat 0 $pad]$num
}
set vendorId [padZero $vendorId]
set productId [padZero $productId]
set deviceFile /proc/bus/usb/devices
set busInfo [split [exec grep "^T:" $deviceFile] \n]
set productInfo [split [exec grep "^P:" $deviceFile] \n]
for {set i 0} {$i < [llength $productInfo]} {incr i} {
if {[string match "*Vendor=$vendorId ProdID=$productId*" [lindex $productInfo $i]]} {
regexp {.*Port=(..)} [lindex $busInfo $i] -> port
if {[string match "00" $port]} {
puts "uba1"
} elseif {[string match "01" $port]} {
puts "ubb1"
} else {
puts stderr "Unknown port for $vendorId/$productId"
exit 3
}
exit
}
}
puts stderr "No match found"
|
|
For what i understand every time you plug a device using ub driver, ub script is executed. But when is the remover executed? Is it executed automatically? i don't understand how the remover works, so if someone wants to explain please. Another thing is, would ub-remove be executed after unplugging the device? I understand bash script so i understand the whole script, but don't know how remover works, when and why it is executed. i have another simply ub automoutn script and would like to run some commands when unplugging the device but as i have those questions i don't know how to do. thanks in advanced
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Si el tonto te alaba lamentalo, si el listo te censura piensalo... |
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DrWoland
l33t
Joined: 13 Nov 2004
Posts: 603
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| Posted: Mon Feb 14, 2005 12:36 am Post subject: |
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| Twink wrote: | | codergeek42 wrote: | | Not to sound condescending or anything, but isn't this what the HAL/dbus/{ivman,gnome-volume-manager} combo was meant to do but in a device-independent way? |
Actually last I checked ivman doesn't support usb sticks yet. |
 Mine works fine.
_________________
I'm not a Guru, I just ask a lot of questions. |
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Teh Penguin D00d
n00b
Joined: 31 Dec 2004
Posts: 35
Location: Tampa, FL
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| Posted: Mon Feb 14, 2005 1:50 pm Post subject: Hmm... |
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...correct me if I'm wrong...and I very well may be...
...but wouldn't pulling a mounted USB device without umounting it first cause nasty problems? Or at the very least, "Device was not cleanly umounted" error messages?
And doesn't "killing all processes that access /mnt/usb" cause further issues? I mean, if you have to kill the processes hard, who's to say they weren't in the middle of reading/writing the data? The second case, of course, being far worse (as far as data integrity goes).
Wouldn't it make more sense to have a hotplug script, and then have a timer with a reasonable interval (say, 30 seconds?) that syncs, then umounts the drive? Subsequent accesses to /mnt/usb could be handled as they were requested (I know rox can automount directories if they are in /etc/fstab, and requested, but not mounted...).
...or am I all wrong? |
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soya
Guru
Joined: 29 Jan 2004
Posts: 425
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| Posted: Mon Feb 14, 2005 3:31 pm Post subject: |
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i've done a very simply script that creates a kde icon after plugging the device, but i don't know how the remover works, my intention is to unmount the device with the kde icon and then the remover shoould act, removing the desktop icon. Is very simply but i'm stack wth teh remover, so hope someone can explain me how it works cause i've read something but can't get success
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Si el tonto te alaba lamentalo, si el listo te censura piensalo... |
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chidychi
Tux's lil' helper
Joined: 18 Dec 2004
Posts: 82
Location: Canada
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| Posted: Wed Feb 23, 2005 6:11 pm Post subject: |
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| soya wrote: | | i've done a very simply script that creates a kde icon after plugging the device, but i don't know how the remover works, my intention is to unmount the device with the kde icon and then the remover shoould act, removing the desktop icon. Is very simply but i'm stack wth teh remover, so hope someone can explain me how it works cause i've read something but can't get success |
hey
i'm just wondering if you figured it out.....
and if not ..
does the original remove script above work for you ? |
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mike_d
n00b
Joined: 05 Feb 2004
Posts: 45
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| Posted: Thu Feb 24, 2005 11:34 pm Post subject: Re: Hmm... |
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| Teh Penguin D00d wrote: | ...correct me if I'm wrong...and I very well may be...
...but wouldn't pulling a mounted USB device without umounting it first cause nasty problems? Or at the very least, "Device was not cleanly umounted" error messages?
And doesn't "killing all processes that access /mnt/usb" cause further issues? I mean, if you have to kill the processes hard, who's to say they weren't in the middle of reading/writing the data? The second case, of course, being far worse (as far as data integrity goes).
Wouldn't it make more sense to have a hotplug script, and then have a timer with a reasonable interval (say, 30 seconds?) that syncs, then umounts the drive? Subsequent accesses to /mnt/usb could be handled as they were requested (I know rox can automount directories if they are in /etc/fstab, and requested, but not mounted...).
...or am I all wrong? |
i also have this same question. i just got a creative nomad muvo which is basically a usb flash drive. i can manually mount it and copy files over to it, but the copying doesn't take place until the umount command is issued. how does hotplug handle this?
mike |
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Teh Penguin D00d
n00b
Joined: 31 Dec 2004
Posts: 35
Location: Tampa, FL
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| Posted: Fri Feb 25, 2005 5:50 pm Post subject: Re: Hmm... |
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| mike_d wrote: |
i also have this same question. i just got a creative nomad muvo which is basically a usb flash drive. i can manually mount it and copy files over to it, but the copying doesn't take place until the umount command is issued. how does hotplug handle this?
mike |
Actually Mike, umount will call sync before umounting. Sync finishes up all I/O requests, then returns. After sync returns, umount does it's duty.
Try it for yourself. Issue the copy command. Execute sync. So long as your copy command was decently long, it will pause for a while, then return to prompt. Check mount to be sure that the device is still mounted. It is. Hard pull it. You'll find the music still on the device.
The problem with the script, however, is that sync doesn't get called. It's impossible to call sync once the drive is removed. Well, I mean, you *can* call it. But it's impossible for sync to do it's duty properly without the drive in place. It can't sync to a drive that's not plugged in, after all. |
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mike_d
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Joined: 05 Feb 2004
Posts: 45
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| Posted: Fri Feb 25, 2005 7:44 pm Post subject: Re: Hmm... |
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| Teh Penguin D00d wrote: |
Actually Mike, umount will call sync before umounting. Sync finishes up all I/O requests, then returns. After sync returns, umount does it's duty.
Try it for yourself. Issue the copy command. Execute sync. So long as your copy command was decently long, it will pause for a while, then return to prompt. Check mount to be sure that the device is still mounted. It is. Hard pull it. You'll find the music still on the device.
The problem with the script, however, is that sync doesn't get called. It's impossible to call sync once the drive is removed. Well, I mean, you *can* call it. But it's impossible for sync to do it's duty properly without the drive in place. It can't sync to a drive that's not plugged in, after all. |
ah ha! i never knew about the sync command. i just assumed that umount did syncing on its own. so basically, i need to execute two commands (1) cp to tell the stuff to go over to the flash drive and (2) sync to make sure it gets there.
my goal is to make the use of the flashdrive wife proof. so is there a away to tell gnome or kde to do a sync after a copy if the files are dragged and dropped (i.e. not close the 'copying files' dialog until the files are physically there)? oviously i can write a script to do a cp and a sync actomatically from the command line, but that would be for my use only. |
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Teh Penguin D00d
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Joined: 31 Dec 2004
Posts: 35
Location: Tampa, FL
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| Posted: Fri Feb 25, 2005 11:19 pm Post subject: Re: Hmm... |
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| mike_d wrote: |
ah ha! i never knew about the sync command. i just assumed that umount did syncing on its own. so basically, i need to execute two commands (1) cp to tell the stuff to go over to the flash drive and (2) sync to make sure it gets there.
my goal is to make the use of the flashdrive wife proof. so is there a away to tell gnome or kde to do a sync after a copy if the files are dragged and dropped (i.e. not close the 'copying files' dialog until the files are physically there)? oviously i can write a script to do a cp and a sync actomatically from the command line, but that would be for my use only. |
And here's the problem with making something "wife proof." The instant you create a brilliant modal window with no way of closing until the operation has completed, the wife creates a desire to move on (Or, dare I say, moves on to a different WM/DE  ). Just like the "little happy globe of magic and wonder" I tell my girlfriend to click for Windows updates, your Window will get ignored, and the drive will be pulled. Now, if you create a piece of hardware that somehow causes the USB drive to "lock" in, and become physically impossible to remove the flash drive until sync has completed, let me know.
You could always create a script that got mean and nasty with users if they pulled out the drive during a sync operation. That's essentially Microsoft's approach. Yell at users if they don't Eject the drive, or "Safely Remove Hardware."
I still think the idea of actively monitoring usage, and after a defined interval, umounting the drive is a good one. And then, only remounting as the drive is requested.
...Perhaps I'll just have to take the aforementioned script into my own hands. Perhaps when the kid goes to sleep tonight...
Keep me posted on that magical USB device locker, though. |
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Teh Penguin D00d
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Joined: 31 Dec 2004
Posts: 35
Location: Tampa, FL
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| Posted: Fri Feb 25, 2005 11:19 pm Post subject: Re: Hmm... |
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| mike_d wrote: |
ah ha! i never knew about the sync command. i just assumed that umount did syncing on its own. so basically, i need to execute two commands (1) cp to tell the stuff to go over to the flash drive and (2) sync to make sure it gets there.
my goal is to make the use of the flashdrive wife proof. so is there a away to tell gnome or kde to do a sync after a copy if the files are dragged and dropped (i.e. not close the 'copying files' dialog until the files are physically there)? oviously i can write a script to do a cp and a sync actomatically from the command line, but that would be for my use only. |
And here's the problem with making something "wife proof." The instant you create a brilliant modal window with no way of closing until the operation has completed, the wife creates a desire to move on (Or, dare I say, moves on to a different WM/DE ). Just like the "little happy globe of magic and wonder" I tell my girlfriend to click for Windows updates, your Window will get ignored, and the drive will be pulled. Now, if you create a piece of hardware that somehow causes the USB drive to "lock" in, and become physically impossible to remove the flash drive until sync has completed, let me know.
You could always create a script that got mean and nasty with users if they pulled out the drive during a sync operation. That's essentially Microsoft's approach. Yell at users if they don't Eject the drive, or "Safely Remove Hardware."
I still think the idea of actively monitoring usage, and after a defined interval, umounting the drive is a good one. And then, only remounting as the drive is requested.
...Perhaps I'll just have to take the aforementioned script into my own hands. Perhaps when the kid goes to sleep tonight...
Keep me posted on that magical USB device locker, though. |
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