Develop Bugs

Can't mount /system as read-write

Hello folks,
on my HTC Desire with OpenDesire 3.5.2 I'm trying to install the dropbear ssh-deamon according to a german tutorial (I'm not allowed to put the link here... ).
It is on www and then android-hilfe.de and then, go /root-hacking-modding-fuer-motorola-milestone/14241-per-ssh-auf-den-milestone.html
I'm connected to the phone using adb and shell'd into.
Now, they say that I have to mount /system as read-write to put a file (dropbear) into /system/bin. The command is
Code:
mount -o remount,rw /dev/block/mtdblock3 /system
and results in no errors. mount then says:
Code:
rootfs on / type rootfs (ro,relatime)
tmpfs on /dev type tmpfs (rw,relatime,mode=755)
devpts on /dev/pts type devpts (rw,relatime,mode=600)
proc on /proc type proc (rw,relatime)
sysfs on /sys type sysfs (rw,relatime)
none on /acct type cgroup (rw,relatime,cpuacct)
tmpfs on /mnt/asec type tmpfs (rw,relatime,mode=755,gid=1000)
none on /dev/cpuctl type cgroup (rw,relatime,cpu)
/dev/block/mtdblock3 on /system type yaffs2 (rw,relatime)
/dev/block/mtdblock5 on /data type yaffs2 (rw,nosuid,nodev,relatime)
/dev/block/mtdblock4 on /cache type yaffs2 (rw,nosuid,nodev,relatime)
/sys/kernel/debug on /sys/kernel/debug type debugfs (rw,relatime)
/dev/block/vold/179:1 on /mnt/sdcard type vfat (rw,dirsync,nosuid,nodev,noexec,relatime,uid=1000,gid=1015,fmask=0702,dmask=0702,allow_utime=0020,codepage=cp437,iocharset=iso8859-1,shortname=mixed,utf8,errors=remount-ro)
/dev/block/vold/179:1 on /mnt/secure/asec type vfat (rw,dirsync,nosuid,nodev,noexec,relatime,uid=1000,gid=1015,fmask=0702,dmask=0702,allow_utime=0020,codepage=cp437,iocharset=iso8859-1,shortname=mixed,utf8,errors=remount-ro)
tmpfs on /mnt/sdcard/.android_secure type tmpfs (ro,relatime,size=0k,mode=000)
so in my opinion, /system shoult be writable.
But everything I try results in an "Out of memory" error: Creating directories, copying files - anything.
Only deleting files is possible: I backed-up and then deleted some ringtones from /system/media/audio/ringtones, and I'm also not able to copy the backup of them I did before onto the sdcard back into the directory again
I read in another thread, that the error "Out of memory" itself is a bug and should mean "No permission". But why don't I have permission?
df -h gives me
Code:
Filesystem Size Used Available Use% Mounted on
tmpfs 203.4M 0 203.4M 0% /dev
tmpfs 203.4M 0 203.4M 0% /mnt/asec
/dev/block/mtdblock3 250.0M 106.4M 143.6M 43% /system
/dev/block/mtdblock5 147.6M 53.9M 93.8M 36% /data
/dev/block/mtdblock4 40.0M 1.1M 38.9M 3% /cache
/dev/block/vold/179:1
3.7G 2.9G 744.3M 80% /mnt/sdcard
/dev/block/vold/179:1
3.7G 2.9G 744.3M 80% /mnt/secure/asec
so there definitively IS enough memory for a 720kB file.
Any ideas?

You can only write to system on the desire via adb from recovery.

If above post didn't explain it enough...
There is no write access to /system partition yet, except via a overlay file system. Have a search and you'll find, like everybody else.

thank you! Yes, that is the problem. I read this also somewhere, but didn't remember it.

I still cant write files even though im in recovery?

zoltrix said:
I still cant write files even though im in recovery?
Click to expand...
Click to collapse
Type "adb remount"
(Without "")

zHk3R said:
Type "adb remount"
(Without "")
Click to expand...
Click to collapse
Im trying to relfash my recovery and i keep getting the no space issue.
If i type in adb remount, i can no longer mount my sd card that is holding my image..
http://forum.xda-developers.com/showthread.php?t=805141
EDIT: If i figure out how to s-off my phone, will that fix it?

zoltrix said:
Im trying to relfash my recovery and i keep getting the no space issue.
If i type in adb remount, i can no longer mount my sd card that is holding my image..
http://forum.xda-developers.com/showthread.php?t=805141
EDIT: If i figure out how to s-off my phone, will that fix it?
Click to expand...
Click to collapse
Just follow the thread in Desire Android Development and you'll have S-OFF easy.
PRO TIP: Use a flash drive rather than burning the .iso on a CD.

Yea but, will i need s-off to flash this recovery?
I know s-off lets you do stuff within fastboot, but im not too sure what taht really means

zoltrix said:
Yea but, will i need s-off to flash this recovery?
I know s-off lets you do stuff within fastboot, but im not too sure what taht really means
Click to expand...
Click to collapse
nevermind, ive done my research and s-off fixed my problem!

details
could you please describe in a little bit more details how you have managed to write the /system mount point ?
thanks in advance ...
btw, there are o bunch of guys that want this answer

What? and Why?
I too would like to know more about writing to /system.
adb remount appears to switch the mount point from "ro" to "rw" (as shown with mount command) but I still get the same "Read-only file system" response when I try to adb push files.
What exactly is the issue here? Is it related to S-ON / S-OFF ?
What do I have to do to be able to write to /system?
(other than reboot into recovery; when I copy files in Recovery, they are gone after a normal reboot)
Thanks

[Q] What if formatting with mkfs.vfat does not complete?

As already noted here http://forum.xda-developers.com/showthread.php?p=35801278#post35801278
my KF's SD card seems to be "corrupt". When booting into recovery all I see is the TWRP boot/background screen (no menus etc). I can launch adb shell.
"df" does not complete:
#df
Filesystem 1K-blocks Used Available Use% Mounted on
tmpfs 228596 32 228564 0% /dev
but nothing more...
"mount" completes and shows (all?) mount points:
#mount
rootfs on / type rootfs (rw)
tmpfs on /dev type tmpfs (rw,relatime,mode=755)
devpts on /dev/pts type devpts (rw,relatime,mode=600)
proc on /proc type proc (rw,relatime)
sysfs on /sys type sysfs (rw,relatime)
/dev/block/mmcblk0p12 on /sdcard type vfat (rw,nodev,noatime,nodiratime,fmask=0000,dmask=0000 ,allow_utime=0022,codepage=cp437,iocharset=iso8859-1,shortname=mixed,errors=remount-ro)
Then I tried formatting the the SD card:
#busybox1 mkfs.vfat /dev/block/mmcblk0p12
but this does not complete neither.
What else can/should I try?
I also played around with with SoupKit. To no avail.
Thx
Clemens

If this is a first gen. kindle http://forum.xda-developers.com/showthread.php?t=1949372 and http://forum.xda-developers.com/showthread.php?t=1850038 may be useful.

# umount /sdcard
umount: can't umount /sdcard: Device or resource busy
who could be using the mount point?
Side note (as mentioned in the other thread):
Switching into fastboot moe
# idme bootmode 4002
fails too... the command does not complete

Check to see if you have bad blocks on your sdcard:
Code:
adb shell
dd if =/dev/block/mmcblk0p12 of=/dev/null
It should return your ins, outs and partition size. If it freezes or doesn't do anything for more than 10 minutes, you probably have bad blocks.
And you should probably check the data and cache partitions as well.
If you run into bad blocks (the dreaded EMMC bug), you'll have to use the partition workaround found somewhere in this thread.
"That's a special kind of stupid. The kind that makes me laugh."

First of all thanks for all your help and of course: Merry Christmas!
soupmagnet said:
If it freezes or doesn't do anything for more than 10 minutes, you probably have bad blocks.
Click to expand...
Click to collapse
thats what it does ...rather...
soupmagnet said:
And you should probably check the data and cache partitions as well.
Click to expand...
Click to collapse
How? I recreated them using SoupKit several time...
soupmagnet said:
partition workaround
Click to expand...
Click to collapse
are you talking about this here? http://forum.xda-developers.com/showthread.php?t=1388996

Usually, if the sdcard is affected by the EMMC bug, so too will the data and cache partitions be affected (possibly even system). As a matter of fact, based on your description, it probably wouldn't hurt to check the recovery partition as well
Check them the same as with the sdcard:
Code:
dd if=/dev/block/mmcblk0p5 of=/dev/null <recovery>
dd if=/dev/block/mmcblk0p9 of=/dev/null <system>
dd if=/dev/block/mmcblk0p10 of=/dev/null <data>
dd if=/dev/block/mmcblk0p11 of=/dev/null <cache>
"That's a special kind of stupid. The kind that makes me laugh."

soupmagnet said:
Code:
dd if=/dev/block/mmcblk0p5 of=/dev/null <recovery>
dd if=/dev/block/mmcblk0p9 of=/dev/null <system>
dd if=/dev/block/mmcblk0p10 of=/dev/null <data>
dd if=/dev/block/mmcblk0p11 of=/dev/null <cache>
Click to expand...
Click to collapse
as expected, none of the dd's comes to an end ...

If only I could unmount the sdcard ...
I guess it's recovery "sitting" on it?
#ps
...
1291 root 19544 R /sbin/recovery
1292 root 3416 S /sbin/adbd recovery
...
How can I proceed? Having no fastboot, not being able to use parted...

[Q] N7105 Bootloop / Access Internal Storage Recovery / Signature Verfication Failed

Hello everyone!
I am (until recently) happy user of a Galaxy Note II N7105. And because it already did everything I needed, I never rooted it, installed CWN/TWRP or flashed a custom ROM. It is 4.1.2 (Hong Kong) version and had only OTA updates until now.
Problem description:
At some point I ran out of internal storage about which the system notified me. I deleted some stuff and rebooted - and then it got stuck in a boot loop. That is after the initial splash screen, it repeats the pretty blue/purple swoosh animation with SAMSUNG indefinitely (at least 20min, battery pulled after that).
As for now, I can get into RECOVERY MODE and DOWNLOAD MODE. Because I still have important data on the internal sd, I don't want to wipe the data/factory reset it. My goal now is just to access the internal storage and extract the data stored on it.
What I have tried:
After installing the drivers I could connect my phone with my laptop. From there I could access my phone via adb
Code:
>adb devices
List of devices attached
42f71b0bf29aaf97 recovery
where I entered the shell (no root --> no su rights) to access all the data and, if possible, use adb pull to copy it to my laptop. But somehow, the two folders sdcard and sdcard1 are empty:
Code:
>adb shell
[email protected]:/ $ ls
ls
cache
data
default.prop
dev
efs
etc
fstab.smdk4x12
init
init.rc
lib
lpm.rc
preload
proc
res
root
sbin
sdcard
sdcard1
sys
system
tmp
ueventd.goldfish.rc
ueventd.rc
ueventd.smdk4x12.rc
[email protected]:/ $ cd sdcard
cd sdcard
[email protected]:/sdcard $ ls
ls
[email protected]:/sdcard $ cd ../sdcard1
cd ../sdcard1
[email protected]:/sdcard1 $ ls
ls
[email protected]:/sdcard1 $
So I was wondering if the internal sdcard (suspect it should be /sdcard) needed to be mounted first, but I could not find a mount point to do so:
Code:
[email protected]:/sdcard1 $ mount
mount
rootfs / rootfs rw 0 0
tmpfs /dev tmpfs rw,nosuid,relatime,mode=755 0 0
devpts /dev/pts devpts rw,relatime,mode=600 0 0
proc /proc proc rw,relatime 0 0
sysfs /sys sysfs rw,relatime 0 0
/dev/block/mmcblk0p12 /cache ext4 rw,nodev,noatime,nodiratime,barrier=1,data=ord
ered 0 0
/dev/block/mmcblk0p13 /system ext4 rw,nodev,noatime,nodiratime,barrier=1,data=or
dered 0 0
==> Is there a way to mount/access the internal sd card from recovery?​I also tried to simple use the command adb pull so that it would copy everything. sadly, it only copied the two folders /sys and /system which are no use to me.
What I have also tried:
Install stock ROMS of 4.1.2 and 4.3 from external sd, via ODIN and adb sideload
GT-N7105_TGY_1_20121026091349_N7105ZHALJ4.zip
NEE-N7105XXUEMK5-20131119111744.zip
(and several others, accidentally also ones for N7100 which also didn't work)​but it resulted in E: signature verification failed
Install CWM and TWRP from external sd and ODIN but both also ended up in E: signature verification failed
Kies: But this somehow always entails a factory reset/wipe data which I want to avoid
==> Where can I get an original 4.1.2 stock ROM that is signed by Samsung?​
I'm open to whatever approaches to get the data.
My thought is: Once it is connected to the laptop, can't I access it as an external hard drive? Any program to do that?
Any help is greatly appreciated!
mrmuhkuh

nexus with broken file system, cannot wipe

Hi everybody,
I'm in deep troubles with my nexus (maguro).
Yesterday, it started to reboot after showing for about 5-10 seconds the lock screen.
the phone is rooted, Iand the last rom (cyanogenmod) was running stable in the last 6 months.
twrp 2.8.0.1 was installed, so I Rebooted to fastboot to flash the 2.8.6.0.
And then the weird part begins:
it's like every partition is read only, but from the mount command it doesn't look like it.
flashing the new recovery is a success, but after reboot the 2.8.0.1 is still there.
factory reset successful, and everything is like before.
wiping sdcard, nothing happens.
if I try to create a backup in twrp, it fails after 20 seconds or so. (I've copied everything to the pc using the pull command in adb).
Try to fix or to change the partitions filesystem in twrp doesn't change anything.
I tried also to change the file system in parted, through the adb shell,this happens:
Code:
~ # ←[6nparted /dev/block/mmcblk0p12 mkfs ext2
parted /dev/block/mmcblk0p12 mkfs ext2
Warning: The existing file system will be destroyed and all data on the
partition will be lost. Do you want to continue?
parted: invalid token: ext2
Yes/No? yes
yes
yes
Partition number? 1
1
1
File system type? [ext2]?
Error: File system was not cleanly unmounted! You should run e2fsck. Modifying
an unclean file system could cause severe corruption.
Ignore/Cancel? i
i
i
Error: File system has an incompatible feature enabled. Compatible features are
has_journal, dir_index, filetype, sparse_super and large_file. Use tune2fs or
debugfs to remove features.
You found a bug in GNU Parted! Here's what you have to do:
Don't panic! The bug has most likely not affected any of your data.
Help us to fix this bug by doing the following:
Check whether the bug has already been fixed by checking
the last version of GNU Parted that you can find at:
...
Please check this version prior to bug reporting.
If this has not been fixed yet or if you don't know how to check,
please visit the GNU Parted website:
...
for further information.
Your report should contain the version of this release (1.8.8.1.179-aef3)
along with the error message below, the output of
parted DEVICE unit co print unit s print
and the following history of commands you entered.
Also include any additional information about your setup you
consider important.
Error: SEGV_MAPERR (Address not mapped to object)
Aborted
and of course nothing changes.
so, I have access to adb in recovery and to fastboot, there is a way to wipe completely the filesystem and start from scratch, or load a different kernel, that would help?
If I send with adb push a new rom to the sdcard, twrp fails and at the next reboot the files disappear.
this is my mount result:
Code:
~ # ←[6nmount
mount
rootfs on / type rootfs (rw)
tmpfs on /dev type tmpfs (rw,seclabel,nosuid,relatime,mode=755)
devpts on /dev/pts type devpts (rw,seclabel,relatime,mode=600)
proc on /proc type proc (rw,relatime)
sysfs on /sys type sysfs (rw,seclabel,relatime)
selinuxfs on /sys/fs/selinux type selinuxfs (rw,relatime)
tmpfs on /tmp type tmpfs (rw,seclabel,relatime)
/dev/block/mmcblk0p11 on /cache type ext4 (rw,seclabel,relatime,user_xattr,barri
er=1,data=ordered)
/dev/block/mmcblk0p12 on /data type ext4 (rw,seclabel,relatime,user_xattr,barrie
r=1,data=writeback)
/dev/block/mmcblk0p12 on /sdcard type ext4 (rw,seclabel,relatime,user_xattr,barr
ier=1,data=writeback)
/dev/block/mmcblk0p10 on /system type ext4 (rw,seclabel,relatime,user_xattr,barr
ier=1,data=ordered)
and remounting in rw the partitions has no effect.
Even the parted, e2fsck, etc files disappear from /sbin after each reboot.
thank you
edit:
Having a second nexus, I could take a look at the partitions, and the difference seems to be the data=writeback options.
I'm looking for a procedure to make them "ordered" as the other phone.
edit2:
Code:
/tmp # ←[6ntune2fs -l /dev/block/mmcblk0p12 | grep features
tune2fs -l /dev/block/mmcblk0p12 | grep features
__bionic_open_tzdata: couldn't find any tzdata when looking for localtime!
__bionic_open_tzdata: couldn't find any tzdata when looking for GMT!
__bionic_open_tzdata: couldn't find any tzdata when looking for posixrules!
Filesystem features: has_journal ext_attr resize_inode filetype needs_recov
ery extent sparse_super large_file
/tmp # ←[6ne2fsck -f /dev/block/mmcblk0p12
e2fsck -f /dev/block/mmcblk0p12
e2fsck 1.42.9 (28-Dec-2013)
/dev/block/mmcblk0p12: recovering journal
Superblock needs_recovery flag is clear, but journal has data.
Run journal anyway<y>? y
y
yes
e2fsck: unable to set superblock flags on /dev/block/mmcblk0p12
/dev/block/mmcblk0p12: ********** WARNING: Filesystem still has errors *********
*
/tmp #
/tmp # ←[6ntune2fs -O ^has_journal /dev/block/mmcblk0p12
tune2fs -O ^has_journal /dev/block/mmcblk0p12
tune2fs 1.42.9 (28-Dec-2013)
The needs_recovery flag is set. Please run e2fsck before clearing
the has_journal flag.
Stuck here at the moment, cannot set superblock flags..
edit3:
Tested every possible superblock position, no luck.
I'm starting to think that the internal memory could be dead, but the phone in fastboot and recovery mode works fine.
I forgot to say that I've tried also the fastboot -w command, it works a lot (about 270 seconds) but no effect.

Help with /dev/block/mmcblkxxx (HTC Desire 816)

The problem started when I flashed the philz touch recovery, and used the "Clear for new rom" in the wipe menu. I then proceeded to try to install two different roms unsuccessfully, as well as trying two different recoveries, and they always return the same error:
Code:
Mount:failed to mount /dev/block/mmcblk0p6
This is a strange error, since using the df command returns the following results:
Code:
tmpfs 683452 160 683292 0% /dev
tmpfs 683452 652 682800 0% /tmp
/dev/block/mmcblk0p42
273948 4408 269540 2% /cache
/dev/block/mmcblk0p44
4506568 707644 3798924 16% /data
/dev/block/mmcblk0p44
4506568 707644 3798924 16% /sdcard
/dev/block/mmcblk1p1 15540224 4846896 10693328 31% /external_sd
If I am understanding this correctly, the ROM should be installed on mmcblk0p44 since it is the internal drive and always has been, not mmcblk0p6, and I don't see why it needs access to mmcblk0p6.
I tried a method of repairing the filesystem using a mkfs.ext4 file, found in a blog.
I then used the following commands after putting the mkfs file in /tmp:
Code:
chmod 777 /tmp/mkfs.ext4
/tmp/mkfs.ext4 -b 4096 -O ^huge_file,^dir_nlink,^ext_attr,^resize_inode,^extra_isize -m 0 /dev/block/mmcblk0p37
After this, I managed to get a ROM to report installing successfully, but when I booted the phone, it got stuck in a boot loop which was better than the immediate booting to recovery, and am now getting the same error again, and I can't boot the phone at all, it just goes into recovery.
I have tried to restore from previous backups, with no luck.
Can anyone help?

jacobjake683 said:
The problem started when I flashed the philz touch recovery, and used the "Clear for new rom" in the wipe menu. I then proceeded to try to install two different roms unsuccessfully, as well as trying two different recoveries, and they always return the same error:
Code:
Mount:failed to mount /dev/block/mmcblk0p6
This is a strange error, since using the df command returns the following results:
Code:
tmpfs 683452 160 683292 0% /dev
tmpfs 683452 652 682800 0% /tmp
/dev/block/mmcblk0p42
273948 4408 269540 2% /cache
/dev/block/mmcblk0p44
4506568 707644 3798924 16% /data
/dev/block/mmcblk0p44
4506568 707644 3798924 16% /sdcard
/dev/block/mmcblk1p1 15540224 4846896 10693328 31% /external_sd
If I am understanding this correctly, the ROM should be installed on mmcblk0p44 since it is the internal drive and always has been, not mmcblk0p6, and I don't see why it needs access to mmcblk0p6.
I tried a method of repairing the filesystem using a mkfs.ext4 file, found in a blog.
I then used the following commands after putting the mkfs file in /tmp:
Code:
chmod 777 /tmp/mkfs.ext4
/tmp/mkfs.ext4 -b 4096 -O ^huge_file,^dir_nlink,^ext_attr,^resize_inode,^extra_isize -m 0 /dev/block/mmcblk0p37
After this, I managed to get a ROM to report installing successfully, but when I booted the phone, it got stuck in a boot loop which was better than the immediate booting to recovery, and am now getting the same error again, and I can't boot the phone at all, it just goes into recovery.
I have tried to restore from previous backups, with no luck.
Can anyone help?
Click to expand...
Click to collapse
Could you please provide me with the mkfs.ext4 binary? The link in that blog has expired.
I'm also having problems with my partitions and can't flash anything. I can't relock the bootloader either.
If you have stock recovery installed on your phone, you should relock the bootloader. Then run the ruu. That should fix the problem.
Thanks in advance.

uhm said:
Could you please provide me with the mkfs.ext4 binary? The link in that blog has expired.
I'm also having problems with my partitions and can't flash anything. I can't relock the bootloader either.
If you have stock recovery installed on your phone, you should relock the bootloader. Then run the ruu. That should fix the problem.
Thanks in advance.
Click to expand...
Click to collapse
Sorry, but I do not have the file anymore due to the fact that I have gone through various hard drive formats and I don't seem to have it on the HTC anymore.

No problem. Thanks for your reply.