I managed to break my micro sd card in half today and I wasn't able to pickup a class 10 or 6 replacement locally so I thought I could use some of the 6gb of internal memory as a virtual filesystem to get me out of trouble.
So, after quickly looking at the android docs and the supported busybox commands I created a 2gb sdcard.img in /data and mounted to /sdcard. I copied some files to it with astro filemanager and fired up raging thunder 2 and it went ahead and downloaded the game data to /sdcard/ and worked correctly.
But, a few apps won't recognise it as an sdcard (Motorola SD card and phone storage settings applet) as well as things like PlayPro (states I have no sdcard present). I thought perhaps I could modify the /etc/vold.fstab file to auto mount the sdcard.img I created using vi but I'm a bit clueless as to what I should change on the dev_mount /sdcard line to get it automounted at boot and hopefully fool the rest of the apps into thinking it is a physical sdcard.
Can anyone possibly point me in the right direction? Not sure how to invoke cmd mode in vi using the milestone qwerty either but I'll keep digging.
What I did (roughly), maybe I'm going about it wrong but any advice would be appreciated.
1. rooted device
2. installed the free terminal app from the market
3. fired up the terminal shell
4. su
5. dd if/dev/zero of=/data/sdcard.img bs=1024 count=1 seek=2000000
6. busybox mkfs.vfat /data/sdcard.img (didn't seem to support -F 32)
7. busybox mount -o loop /data/sdcard.img /sdcard/
+ 1 for this, it would be great to can use internal storage for user data
Why do you let this nice post die.. so "flibbulator" found anything more out?.. I'd like to know more.. like if you got it to work with Music Players and Video players??
Try to mount /data/sdcard.img to /mnt/sdcard (/sdcard is a link to /mnt/sdcard)
or try "export EXTERNAL_STORAGE /sdcard"
I made in a different way: created a 4GB storage.img in /data and mounted it in /sdcard/storage, so internal storage is finally usable for user data
the problem was to set mount point on boot, I can't find a way to execute a script on boot (you can't permanently modify init.rc)
flibbulator said:
What I did (roughly), maybe I'm going about it wrong but any advice would be appreciated.
1. rooted device
2. installed the free terminal app from the market
3. fired up the terminal shell
4. su
5. dd if/dev/zero of=/data/sdcard.img bs=1024 count=1 seek=2000000
6. busybox mkfs.vfat /data/sdcard.img (didn't seem to support -F 32)
7. busybox mount -o loop /data/sdcard.img /sdcard/
Click to expand...
Click to collapse
I have actually tried this on my Droid2Global, and I get the error "unknown operand if/dev/zero" I feel like I am missing the point or do not fully understanding how to use the "dd" command?
the correct syntax is:
dd if=/dev/zero of=/data/sdcard.img bs=1024 count=4194340
4194340 --> 4GB
patton82 said:
the correct syntax is:
dd if=/dev/zero of=/data/sdcard.img bs=1024 count=4194340
4194340 --> 4GB
Click to expand...
Click to collapse
Thank you bro.
Quick question I keep getting these errors. I do have a folder in "/" named "sdcard-int"
Better Terminal Emulator Pro
/ # busybox mount -o loop /data/sdcard.img /sdcard-int/
mount: can't setup loop device: No such file or directory
/ # busybox mount -o /data/sdcard.img /sdcard-int
mount: can't read /etc/fstab: No such file or directory
/ #
Sent from my DROID2 GLOBAL using Tapatalk
you can't place anything in root folder, /sdcard is a link to /mnt/sdcard and is created by init.rc (you can't edit init.rc, it's provided by boot.img, so need to extract from boot.img and repack)
I made in this way but I have to manually execute a script or a command from terminal after every boot to mount storage.img
mkdir /sdcard/storage
su
dd if=/dev/zero of=/data/storage.img bs=1024 count=4194340
busybox mkfs.vfat /data.storage.img
mount -o loop -t vfat /data/storage.img /sdcard/storage
Will be lost anything after reboot when use this storage?
Sent from my MotoA953 using XDA App
all the stuff in img file will not be lost, as long as you put it in /data/
on the contrary the mount point must be restored after reboot
patton82 said:
you can't place anything in root folder, /sdcard is a link to /mnt/sdcard and is created by init.rc (you can't edit init.rc, it's provided by boot.img, so need to extract from boot.img and repack)
I made in this way but I have to manually execute a script or a command from terminal after every boot to mount storage.img
mkdir /sdcard/storage
su
dd if=/dev/zero of=/data/storage.img bs=1024 count=4194340
busybox mkfs.vfat /data.storage.img
mount -o loop -t vfat /data/storage.img /sdcard/storage
Click to expand...
Click to collapse
Thank you, I will use the Thank you button when I login via PC.
I still get the same error, I know that I'm doing something incorrectly or maybe I don't understand "mount" comment correctly?
/ $ su
/ # mkdir /sdcard/storage
/ # dd if=/dev/zero of=/data/storage.img bs=1024 count=41943404194340+0 recordsn
4194340+0 records out
4295004160 bytes (4.0GB) copied, 339.823883 seconds, 12.1MB/s
/ # busybox mkfs.vfat /data/storage.img
/ # mount -o loop -t vfat /data/storage.img /sdcard/storage
mount: can't setup loop device: No such file or directory
/ #
I am using my sdcard also, I'm not too sure if that makes any difference?
Sent from my DROID2 GLOBAL using Tapatalk
Better terminal pro uses BASH shell, I presume
try to switch to android shell, in preferences
or to use terminal emulator (free) from market
Okay, I tried Android Terminal Emulator, and this is a new error.
export PATH=/data/local/bin:$PATH
$ $ su
# mount -o loop -t vfat /data/storage.img /sdcard/storage
ioctl LOOP_SET_FD failed: Device or resource busy
#
Not too sure where to go now. I thank you again for all your help, and time.
Sent from my DROID2 GLOBAL using Tapatalk
resource busy, you have to reboot the phone
I use Gscript lite, add a script with the string
mount -o loop -t vfat /data/storage.img /sdcard/storage
and create a shortcut to homescreen, so when I reboot, I can mount the img file in one click
Cool mod for my ROM. Could I take it??
sure, they are simple shell commands
the best would be to do what happen with Samsung Galaxy S: internal storage mounted as sdcard and physical sdcard mounted in a folder /sdcard/sd
storage.img is 3-4 times faster than my peak 8GB class 6
There is an application "Autostart" in the market, which can automatially execute a script with root after boot up.
I up because I'm now also interested in making profit of the huge internal storage. I'd like to put my wikipedia data from wikidroyd to the internal storage. Hopefully I'm skilled enough to follow the given steps...I doubt that though
fKngFtd said:
Okay, I tried Android Terminal Emulator, and this is a new error.
export PATH=/data/local/bin:$PATH
$ $ su
# mount -o loop -t vfat /data/storage.img /sdcard/storage
ioctl LOOP_SET_FD failed: Device or resource busy
#
Not too sure where to go now. I thank you again for all your help, and time.
Click to expand...
Click to collapse
Guys, I need your help! I have exactly. The same problem:
Every time I try to mount my storage.img I get
Ioctl LOOP_SET_FD failed: Device or resource busy.
I rebooted several times and also tried to mount smaller images (first I tried 3gb then I tried 1mb).
Any solution?
Edit: I solved it myself. I always forgot to punch in busybox before the command. Now it worked for me!!
I do have a question now. With help of Gscript I made a shortcut to mount the storage.img to my sdcard. But my pc wont recognise the sdcard as long as the image is mounted. What is the command to unmount the partition so I wouldnt have to reboot my phone before connecting it to the pc...?
Any help is much appreciated! Thx
(Something like busybox unmount -o loop -t vfat...?)
Sent from my MotoA953 using XDA App
Credit to sofauxboho for performing dumps.
Partition Dump
http://gititbit.ch/sk4g2 - partition dump
Code:
bml1 256 KB contains boot.bin (262144 bytes), Primary Boot Loader (low-level hardware initialization)
bml2 256 KB contains PIT file first 512 bytes
bml3 10240 KB /dev/block/stl3 /efs
bml4 1280 KB contains Sbl.bin (1310720 bytes) Secondary Boot Loader (loads the Linux kernel and passes the necessary arguments)
bml5 1280 KB contains Secondary Boot Loader (for recovery, ect)
bml6 5120 KB param.lfs /mnt/.lfs j4fs
bml7 7680 KB contains zImage and initramfs
bml8 7680 KB empty - on Epic 4G and Fascinate, contains recovery.bin
bml9 293376 KB factoryfs.rfs ( /system RFS Partition) /dev/block/stl9
bml10 137216 KB dbdata.rfs ( /dbdata RFS Partition) /dev/block/stl10
bml11 35840 KB cache.rfs ( /cache RFS Partition) /dev/block/stl11
bml12 12800 KB modem.bin
EDIT: It has come to my attention that the Super One Click works, no need for a script.
More Mirrors
http://gititbit.ch/sk41 - Sidekick 4G system dump
http://gititbit.ch/sk4g1 - Sidekick 4G Info Dump
dev.txt
devblock.txt
efs.txt
mount.txt
partitions.txt
proc.txt
Kernel + Platform Source
http://gititbit.ch/sk4g5 - SGH-T839_OpenSource.zip
Now for custom roms...
SK4G development chat can be found at irc.freenode.net #sk4g
hey, sorry i'm not super code-savvy.... do i simply place the .rar file on my sd card, or open it with say, 7zip, and copy the autoroot folder over? i'm getting 'unable to chmod, operation not permitted' the second way, and 'not found, no such directory, etc' when i place the .rar file on my sd card. both of these are appearing after the first line with chmod 755 etc.
Use winrar to extract the .rar then place the extracted folder onto the sdcard.
dasmoover said:
Use winrar to extract the .rar then place the extracted folder onto the sdcard.
Click to expand...
Click to collapse
ok, think i did that, but am still getting 'operation not permitted'..... perhaps i'll hold off and see if someone else has success with it?
Hmm...
Should line 14 specify the su file rather than the containing directory?
It currently reads:
Code:
cp su /system/xbin/ && chmod 4755 /system/xbin/
But perhaps it should read:
Code:
cp su /system/xbin/ && chmod 4755 /system/xbin/su
Updated the script in the main download.
yogi2010 said:
hey, sorry i'm not super code-savvy.... do i simply place the .rar file on my sd card, or open it with say, 7zip, and copy the autoroot folder over? i'm getting 'unable to chmod, operation not permitted' the second way, and 'not found, no such directory, etc' when i place the .rar file on my sd card. both of these are appearing after the first line with chmod 755 etc.
Click to expand...
Click to collapse
Im getting this when I try the lines too.
When I copied the autoroot folder to my SK4G, the contents of the folder were already set to 775, so there should be no need to chmod (though I also get the permission error when trying to chmod them).
The bigger issue is that my device doesn't have the cp command. I'd assume it would be in /system/bin along with things like ls and mv, but it's not.
Huh. That's odd. You guys are using the newer download, right?
Do you have any idea which chmod command is erroring out? I'm wondering if it's the chmod on the rage...bin in line 9 or the chmod on su in line 14.
Unfortunately I can't test without wiping my SK4G back to unrooted, which I would rather not do as it's my primary handset.
If you don't know which line is causing the trouble, could you try copying the kit but then entering each line manually?
sofauxboho said:
Huh. That's odd. You guys are using the newer download, right?
Do you have any idea which chmod command is erroring out? I'm wondering if it's the chmod on the rage...bin in line 9 or the chmod on su in line 14.
Unfortunately I can't test without wiping my SK4G back to unrooted, which I would rather not do as it's my primary handset.
If you don't know which line is causing the trouble, could you try copying the kit but then entering each line manually?
Click to expand...
Click to collapse
No I was usin the old link didn't try new one yet. Still says same thing on new version
Sent From SK4G
sofauxboho said:
Huh. That's odd. You guys are using the newer download, right?
Do you have any idea which chmod command is erroring out? I'm wondering if it's the chmod on the rage...bin in line 9 or the chmod on su in line 14.
Unfortunately I can't test without wiping my SK4G back to unrooted, which I would rather not do as it's my primary handset.
If you don't know which line is causing the trouble, could you try copying the kit but then entering each line manually?
Click to expand...
Click to collapse
I tried the newer download. All of the chmods error because my user doesn't own those files or already have write permissions for any of them. I don't have read, write, or execute permissions for /data/local/tmp either, so I can't list or copy to that location. But, separate from that, there is no cp command, so I can't copy anything anywhere.
jarrodlombardo said:
When I copied the autoroot folder to my SK4G, the contents of the folder were already set to 775, so there should be no need to chmod (though I also get the permission error when trying to chmod them).
The bigger issue is that my device doesn't have the cp command. I'd assume it would be in /system/bin along with things like ls and mv, but it's not.
Click to expand...
Click to collapse
Ah, right! That's why I used cat instead of cp when I rooted mine.
Try this:
Code:
#!/bin/sh
#autoroot script for sidekick v0.1
#chmod 755 autoroot.sh
echo "Copying binaries to /data/local/tmp/"
cat su > /data/local/tmp/su
cat Superuser.apk > /data/local/tmp/Superuser.apk
cat rageagainstthecage-arm5.bin > /data/local/tmp/rageagainstthecage-arm5.bin
cd /data/local/tmp/
echo "I'm about to chmod rageagainstthecage-arm5.bin"
chmod 755 rageagainstthecage-arm5.bin
echo "Executing exploit, please wait"
./rageagainstthecage-arm5.bin
sleep 20
echo "Attempting to spawn root shell"
sh
whoami
echo "Attempting to mount /system read-write"
mount -o remount,rw /dev/block/stl9 /system
echo "Attempting to copy and chmod su"
cat /data/local/tmp/su > /system/xbin/su && chmod 4755 /system/xbin/su
echo "Attempting to copy Superuser.apk"
cat /data/local/tmp/Superuser.apk > /system/app/Superuser.apk
sleep 5
mount -o remount,ro /dev/block/stl9 /system
#add root entry to passwd and group
echo "root::0:0:root:/data/local:/system/bin/sh" > /etc/passwd
echo "root::0:" > /etc/group
echo "autoroot completed succesfully."
I've also added a bunch of echoed comments to help us track where things go wrong if it doesn't work.
sofauxboho said:
Ah, right! That's why I used cat instead of cp when I rooted mine.
Try this:
Code:
#!/bin/sh
#autoroot script for sidekick v0.1
#chmod 755 autoroot.sh
echo "Copying binaries to /data/local/tmp/"
cat su > /data/local/tmp/su
cat Superuser.apk > /data/local/tmp/Superuser.apk
cat rageagainstthecage-arm5.bin > /data/local/tmp/rageagainstthecage-arm5.bin
cd /data/local/tmp/
echo "I'm about to chmod rageagainstthecage-arm5.bin"
chmod 755 rageagainstthecage-arm5.bin
echo "Executing exploit, please wait"
./rageagainstthecage-arm5.bin
sleep 20
echo "Attempting to spawn root shell"
sh
whoami
echo "Attempting to mount /system read-write"
mount -o remount,rw /dev/block/stl9 /system
echo "Attempting to copy and chmod su"
cat /data/local/tmp/su > /system/xbin/su && chmod 4755 /system/xbin/su
echo "Attempting to copy Superuser.apk"
cat /data/local/tmp/Superuser.apk > /system/app/Superuser.apk
sleep 5
mount -o remount,ro /dev/block/stl9 /system
#add root entry to passwd and group
echo "root::0:0:root:/data/local:/system/bin/sh" > /etc/passwd
echo "root::0:" > /etc/group
echo "autoroot completed succesfully."
I've also added a bunch of echoed comments to help us track where things go wrong if it doesn't work.
Click to expand...
Click to collapse
Type this into terminal right?
Actually, I whipped up a modified version of dasmoover's tool with my changes:
http://notfine.com/android/sk4g/autoroot-V01b-sfb.zip
Unzip that and copy the "autoroot" folder to your SD card.
Next, eject your SK, turn off USB Storage mode, and unplug it from your computer.
Then follow dasmoover's instructions (I've cleaned them up slightlly):
1. Place autoroot folder on sdcard
2. Install the Terminal Emulator app from the Marketplace
3. Open the Terminal Emulator app and type the following commands exactly, one at a time, hitting enter at the end of the line:
Code:
chmod 755 /sdcard/autoroot/autoroot.sh
./sdcard/autoroot/autoroot.sh
If the sdcard is mounted as noexec, follow these steps:
1. Place autoroot folder on sdcard
2. Install the Terminal Emulator app from the Marketplace
3. Open the Terminal Emulator app and type the following commands exactly, one at a time, hitting enter at the end of the line:
Code:
cat > /sdcard/autoroot/autoroot.sh /data/local/tmp/autoroot.sh
chmod 755 /data/local/tmp/autoroot.sh
cd /sdcard/autoroot/
./data/local/tmp/autoroot.sh
Click to expand...
Click to collapse
All credit to dasmoover, btw! Thanks, and I hope you don't mind me modifying and repackaging your tool. Just trying to help get it working.
BTW, here are some good goodies on how this root exploit works for the technical and curious:
I'd read this one first: http://intrepidusgroup.com/insight/2010/09/android-root-source-code-looking-at-the-c-skills/
And this one second:
http://dtors.org/2010/08/25/reversing-latest-exploid-release/
How did you get rid of the $ sign and get a # ? When I type the first line with the ca it sayd directory can't be found.
Sent From SK4G
I copied the new cat version onto my device and did the following:
$ chmod 755 /sdcard/autoroot/autoroot.sh
Unable to chmod /sdcard/autoroot/autoroot.sh: Operation not permitted
$ cat /sdcard/autoroot/autoroot.sh > /data/local/tmp/autoroot.sh
Cannot create /data/local/tmp/autoroot.sh: permission denied
So, I'm still stuck since /data/local/tmp isn't writable. (Also, you'll note I fixed the small error in the cat line I used.)
Ace42 said:
How did you get rid of the $ sign and get a # ? When I type the first line with the ca it sayd directory can't be found.
Sent From SK4G
Click to expand...
Click to collapse
So, the # means root. The $ means not root. The whole point of this is to get the #, which indicates a root prompt.
If it says the directory can't be found then either the command was typed incorrectly or the files are in the wrong place. The files have to be in the exact right places with the exact right names.
Download my modified version:
http://notfine.com/android/sk4g/autoroot-V01b-sfb.zip
Unzip it, and it should give you a folder called "autoroot". Inside that should be four files:
autoroot.sh
rageagainstthecage-arm5.bin
su
Superuser.apk
Make sure there is only a folder named "autoroot" with those four files inside. If there is another directory inside it won't work. If the names are at all different it won't work.
Copy this "autoroot" folder to the top level of your SD card. There should be other folders there like Music, DCIM, Playlists, and Android. Maybe some others. Make sure it's at the very top level, along with these other directories.
Here, take a look at my directory structure:
{
"lightbox_close": "Close",
"lightbox_next": "Next",
"lightbox_previous": "Previous",
"lightbox_error": "The requested content cannot be loaded. Please try again later.",
"lightbox_start_slideshow": "Start slideshow",
"lightbox_stop_slideshow": "Stop slideshow",
"lightbox_full_screen": "Full screen",
"lightbox_thumbnails": "Thumbnails",
"lightbox_download": "Download",
"lightbox_share": "Share",
"lightbox_zoom": "Zoom",
"lightbox_new_window": "New window",
"lightbox_toggle_sidebar": "Toggle sidebar"
}
(Yes, I'm on a Mac, but your SK and Android don't care. File locations work the same on Windows or Linux or whatever. Also, I may have some folders you don't have. That's ok.)
Next, eject your SK, turn off USB Storage mode, and unplug it from your computer. **I forgot this part earlier! It's important.**
Then open up Terminal Emulator an your SK4G. Type:
Code:
cd /sdcard/autoroot
Then type:
Code:
ls
This should list the same four files above. If it does, you're ready to start the instructions I posted previously.
If it doesn't, type:
Then type:
Code:
ls /sdcard/
Let me know what it says.
jarrodlombardo said:
I copied the new cat version onto my device and did the following:
$ chmod 755 /sdcard/autoroot/autoroot.sh
Unable to chmod /sdcard/autoroot/autoroot.sh: Operation not permitted
$ cat /sdcard/autoroot/autoroot.sh > /data/local/tmp/autoroot.sh
Cannot create /data/local/tmp/autoroot.sh: permission denied
So, I'm still stuck since /data/local/tmp isn't writable. (Also, you'll note I fixed the small error in the cat line I used.)
Click to expand...
Click to collapse
Yeah, I've confirmed this problem.
Folks, this thing won't work right now. We need a location that is both writable and allows execution. Any ideas?
(To confirm, you can still root by using adb to manually put these files at /data/local/tmp/ For some reason, adb has rights to this location. However, the standard Terminal Emulator does not. This is only a hang-up for on-device rooting, not rooting in general.)
sofauxboho said:
Yeah, I've confirmed this problem.
Folks, this thing won't work right now. We need a location that is both writable and allows execution. Any ideas?
Click to expand...
Click to collapse
I've poked around some and not found anywhere yet. :/
Recently was running ParanoidKANGdroid and then updated to ParanoidKANGdroid 2.30 (4/5) but phone got stuck in samsung logo. (phone wouldnt boot up). I then had to use this method to restore my phone http://forum.xda-developers.com/showthread.php?t=1762204
It was the only way to get my phone to get bootup and have su.
I finally got it back to working but now it shows factory test mode has stopped working and keeps popping up on my verizon galaxy s3. I ve tried every possible solution. I am on rooted stock rom and i cannot install any other rom. I have my IMEI number but when I look in the /efs folder there are no files. I did not create a backup. Please help
Oh and I tried the following but it did not help it just says it cannot create folder.
Open a terminal emulator
Type su
Then enter the following after the #
echo -n ON > /efs/FactoryApp/factorymode
i found this
Open terminal emulator and type as ;
su
rm /efs/FactoryApp/keystr
rm /efs/FactoryApp/factorymode
echo -n ON >> /efs/FactoryApp/keystr
echo -n ON >> /efs/FactoryApp/factorymode
chown 1000.1000 /efs/FactoryApp/keystr
chown 1000.1000 /efs/FactoryApp/factorymode
chmod 0744 /efs/FactoryApp/keystr
chmod 0744 /efs/FactoryApp/factorymode
reboot
I tried that but right after I enter
rm /efs/FactoryApp/keystr
It gives me the following:
rm failed for /efs/FactoryApp/keystr, No such file or directory
Same problem with me
psychojv said:
I tried that but right after I enter
rm /efs/FactoryApp/keystr
It gives me the following:
rm failed for /efs/FactoryApp/keystr, No such file or directory
Click to expand...
Click to collapse
same problem is coming with me..
some one help..
i have same here, solutions?
So, I deleted the files, not the sdcard. The internal files. And I keep getting this screen. Any help would be greatly appreciated. I have Odin, Odin w/re partition, restored from nandroid, and full wipe with a factory reset. No matter what it keeps coming back every 2 mins. And, there is no lock screen,,, Thank you
Awesome.. Found a solution. I am up and running. It was a corrupt EFS partition. To fix you have to follow this guide.
You have to root your phone and install Terminal Emulator from Google Play.
Open terminal emulator and type as ;
su
rm /efs/FactoryApp/keystr
rm /efs/FactoryApp/factorymode
echo -n ON >> /efs/FactoryApp/keystr
echo -n ON >> /efs/FactoryApp/factorymode
chown 1000.1000 /efs/FactoryApp/keystr
chown 1000.1000 /efs/FactoryApp/factorymode
chmod 0744 /efs/FactoryApp/keystr
chmod 0744 /efs/FactoryApp/factorymode
reboot
You now should not see the that message anymore. Its because of an EFS corruption. ( Thanks to yesilcin*com) for exact solution.