Re: [gentoo-user] mtp cannot create directories on SD card on cellphone
Walter, On Wednesday, 2024-05-15 17:28:46 -0400, you wrote: > What I *CAN* do... upload/download/create/delete *FILES* on SD card > > What I *CANNOT* do... create new *DIRECTORIES* on SD card > > [x8940][waltdnes][~/tablet/sdcard1] mkdir data > mkdir: cannot create directory ‘data’: Input/output error > > This happens with both "jmtps" and "simple-mtpfs", so I think it's > probably a systemic issue that affects all implementions. Though I also have "simple-mtpfs" installed I'm mostly using it with the SD cards mounted read-only. For "real" work I'm using "adb" provided by "dev-util/android-tools". Among many other things like pushing files to or pulling files from your mobile phone, it provides a "shell" sub-com- mand which allows executing a single shell command on the mobile device or opening a shell on it for issuing more commands in a row: $ adb shell herolte:/ $ cd /storage/emulated/0 herolte:/storage/emulated/0 $ ls -ld . drwxrwx--x 27 root sdcard_rw 4096 2024-05-16 08:01 . herolte:/storage/emulated/0 $ touch xxx herolte:/storage/emulated/0 $ ls -l xxx -rw-rw 1 root sdcard_rw 0 2024-05-16 16:13 xxx herolte:/storage/emulated/0 $ mkdir yyy herolte:/storage/emulated/0 $ ls -ld yyy drwxrwx--x 2 root sdcard_rw 4096 2024-05-16 16:13 yyy herolte:/storage/emulated/0 $ rmdir yyy herolte:/storage/emulated/0 $ rm xxx herolte:/storage/emulated/0 $ cd /storage/5BC5-805B herolte:/storage/5BC5-805B $ ls -ld . drwxrwx--x 7 root sdcard_rw 32768 2024-02-21 20:20 . herolte:/storage/5BC5-805B $ touch xxx herolte:/storage/5BC5-805B $ ls -l xxx -rwxrwx--x 1 root sdcard_rw 0 2024-05-16 16:14 xxx herolte:/storage/5BC5-805B $ mkdir yyy herolte:/storage/5BC5-805B $ ls -ld yyy drwxrwx--x 2 root sdcard_rw 32768 2024-05-16 16:15 yyy herolte:/storage/5BC5-805B $ rmdir yyy herolte:/storage/5BC5-805B $ rm xxx herolte:/storage/5BC5-805B $ exit Three additional remarks: - The mobile phone is not required to be rooted. - But to get "adb" working requires "USB Debugging" to be enabled on the mobile device. On your mobile device this option can be found under "Settings -> Developer Options" (if the "Developer Options" are still hidden in the "Settings" menu, make them visible once and forever by opening "Settings -> About Device -> Software Information" and tapping "Build Number" seven times). - For security reasons (for instance when charging your phone at a pub- lic charging station) you should only enable "USB Debugging" on your own phone while connecting it with your own computer for file transfer or similar work. Sincerely, Rainer
Re: [gentoo-user] mtp cannot create directories on SD card on cellphone
On Wed, May 15, 2024 at 03:06:50PM -0700, Mark Knecht wrote > > Have you checked that the directory where you are attempting to > do this is one that your account owns? I generally have to su - to > root, create a directory at the top level, change it so that I own it and > have rwx permissions, and then exit root. After that I can do what I want. I have a short script ~/bin/tabon [x8940][waltdnes][~] cat bin/tabon #!/bin/bash sudo /usr/bin/jmtpfs /home/waltdnes/tablet -o allow_other,auto_unmount,rw # # Only needed once #sudo /bin/chown -R waltdnes:users /home/waltdnes/tablet The last (commented out) line *USED TO WORK*. Now it spits out a whole slew of... /bin/chown: changing ownership of '/home/waltdnes/tablet/sdcard1/blah_blah_blah': Function not implemented ...one for each direcory and file. I believe the phone formats the card as either FAT32 or XFAT. -- Roses are red Roses are blue Depending on their velocity Relative to you
Re: [gentoo-user] mtp cannot create directories on SD card on cellphone
On Wed, May 15, 2024 at 4:38 PM Walter Dnes wrote: > > > Have you checked that the directory where you are attempting to do > > this is one that your account owns? I generally have to su - to root, > > create a directory at the top level, change it so that I own it and > > have rwx permissions, and then exit root. After that I can do what > > I want. > > So I did "su" and tried changing ownership... failed > > x8940 /home/waltdnes/tablet # chown waltdnes:users sdcard1 > chown: changing ownership of 'sdcard1': Function not implemented > > Let's try "chmod"... failed silently > > [x8940][root][/home/waltdnes/tablet] chmod 777 sdcard1 > [x8940][root][/home/waltdnes/tablet] ll > total 24 > drwxr-xr-x 4 root root 0 Dec 31 1969 . > drwxr-xr-x 144 waltdnes users 24576 May 15 18:17 .. > drwxr-xr-x 5 root root 0 Nov 16 4456932 sdcard > drwxr-xr-x 6 root root 0 Apr 22 4456932 sdcard1 > > root can't chmod sdcard1. > > [x8940][root][/home/waltdnes/tablet] mkdir sdcard1/data > mkdir: cannot create directory ‘sdcard1/data’: Input/output error > > and root can't create a directory!!! Let's try top level... > > [x8940][root][~] cd /home/waltdnes/tablet > [x8940][root][/home/waltdnes/tablet] mkdir data > mkdir: cannot create directory ‘data’: Read-only file system > So it seems very strange to me that, per the initial message, you can create and delete files, which implies the file system is not read only, but the mkdir command thinks it is read only. And from what I've read there is no read-only switch on this SD card, correct? It's just something like a chip that plugs into a Raspberry Pi or a camera, correct? I am not exactly clear from rereading what the actual SD card is or how it's attached, and you are using file system types I know nothing about. However, if only for clarity, what I've had to do even with ext3/4 is essentially the following: 1) su - and enter root password. 2) As root navigate to /home/walter/tablet or whatever the location is where you believe you are really ON the SD card 3) Create a file using vi, save the file, make sure it's there and make sure it's owned root:root. 4) Exit the su and make sure the file is there. Unmount the SD card, remount the SD card and check that it's really there. Put the SD card in some other system where you can see the file, if possible. 5) Assuming all of that makes sense, remount the CD card, su there again, and chown the file to walter:walter or walter:user or whatever is appropriate. Make sure you can edit the file from some other terminal process. 6) As root in the su, then try to create a directory. If it's still read only then this is way above my pay grade. However if you can create the directory, which I've always been able to do as root, then chown -R the directory to your user ID. It is important to ensure that OS believes you have read/write access all the way up and down the chain so you might need to chown -R walter:walter AS ROOT from your home directory into the mount point, which if I understand, is /home/walter/tablet, so I'd be root and doing the command sitting in /home/walter. Sorry. Wish I could be more helpful but this has been a problem on my systems ever since I started using Linux 25-30 years ago and I struggle with it maybe once a year. Good luck, Mark
Re: [gentoo-user] mtp cannot create directories on SD card on cellphone
> Have you checked that the directory where you are attempting to do > this is one that your account owns? I generally have to su - to root, > create a directory at the top level, change it so that I own it and > have rwx permissions, and then exit root. After that I can do what > I want. So I did "su" and tried changing ownership... failed x8940 /home/waltdnes/tablet # chown waltdnes:users sdcard1 chown: changing ownership of 'sdcard1': Function not implemented Let's try "chmod"... failed silently [x8940][root][/home/waltdnes/tablet] chmod 777 sdcard1 [x8940][root][/home/waltdnes/tablet] ll total 24 drwxr-xr-x 4 root root 0 Dec 31 1969 . drwxr-xr-x 144 waltdnes users 24576 May 15 18:17 .. drwxr-xr-x 5 root root 0 Nov 16 4456932 sdcard drwxr-xr-x 6 root root 0 Apr 22 4456932 sdcard1 root can't chmod sdcard1. [x8940][root][/home/waltdnes/tablet] mkdir sdcard1/data mkdir: cannot create directory ‘sdcard1/data’: Input/output error and root can't create a directory!!! Let's try top level... [x8940][root][~] cd /home/waltdnes/tablet [x8940][root][/home/waltdnes/tablet] mkdir data mkdir: cannot create directory ‘data’: Read-only file system A suggestion at https://ubuntuforums.org/showthread.php?p=7317638 > The permissions for non-linux filesystems are defined for the whole > partition at the time it's mounted, and you can change them by > configuring the drive in /etc/fstab. So I added a line to /etc/fstab, but no luck... /sys/fs/fuse/connections /home/waltdnes/tablet auto noauto,users,noatime,nodiratime,async,rw 0 0 No luck. -- Roses are red Roses are blue Depending on their velocity Relative to you
Re: [gentoo-user] mtp cannot create directories on SD card on cellphone
On Wed, May 15, 2024 at 2:29 PM Walter Dnes wrote: > > What I *CAN* do... upload/download/create/delete *FILES* on SD card > > What I *CANNOT* do... create new *DIRECTORIES* on SD card > > [x8940][waltdnes][~/tablet/sdcard1] mkdir data > mkdir: cannot create directory ‘data’: Input/output error > > This happens with both "jmtps" and "simple-mtpfs", so I think it's > probably a systemic issue that affects all implementions. For now I'm > using the "screenshots" directory for transferring miscellaneous files, > but I'd really like to solve the core problem. Any ideas? Have you checked that the directory where you are attempting to do this is one that your account owns? I generally have to su - to root, create a directory at the top level, change it so that I own it and have rwx permissions, and then exit root. After that I can do what I want. HTH, Mark
[gentoo-user] mtp cannot create directories on SD card on cellphone
What I *CAN* do... upload/download/create/delete *FILES* on SD card What I *CANNOT* do... create new *DIRECTORIES* on SD card [x8940][waltdnes][~/tablet/sdcard1] mkdir data mkdir: cannot create directory ‘data’: Input/output error This happens with both "jmtps" and "simple-mtpfs", so I think it's probably a systemic issue that affects all implementions. For now I'm using the "screenshots" directory for transferring miscellaneous files, but I'd really like to solve the core problem. Any ideas? -- Roses are red Roses are blue Depending on their velocity Relative to you
