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2011-01-04
, 11:20
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Posts: 840 |
Thanked: 823 times |
Joined on Nov 2009
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#2
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because you are in mydocs which is FAT32 you cannot do the same linux permission stuff there as you can with your linux partition.
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2011-01-04
, 11:24
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Posts: 73 |
Thanked: 24 times |
Joined on Jan 2010
@ Paris
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#3
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Arg ! This is happening to me all the time, I forgot wich FSystem I'm working on...! Thanks !
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2011-01-04
, 11:46
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Posts: 1,048 |
Thanked: 1,127 times |
Joined on Jan 2010
@ Amsterdam
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#4
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Actually you can chmod files on the MyDocs partition, unless I am misunderstanding your problem. But every time I run into the problem you describe, I have to do a filesystemcheck because the superblock got corrupted, one way or another.
So, when I run into that problem, I unmount the MyDocs partition, fsck -a the now unmounted partition and remount after that.
So, when I run into that problem, I unmount the MyDocs partition, fsck -a the now unmounted partition and remount after that.
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2011-01-04
, 12:13
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Posts: 244 |
Thanked: 354 times |
Joined on Jul 2010
@ Scotland
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#5
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The mount options for /home/user/MyDocs specify noexec along with a fmask to ensure files are 644 (note dmask sets chmod 7777 for directories); see here:
You'll need to either:
a) Remove the noexec option and alter the fmask to force any file to be executable from with /etc/fstab (which is autogenerated, so this will need to be altered every time you boot?)
or
b) unmount manually /home/user/MyDocs and then manually remount with your preferred mount options.
Check the mount manpage for more details on mount options
http://linux.die.net/man/8/mount
There may be other threads on here regarding the specifics of fstab manipulation - give the search option a whirl.
Last edited by gregoranderson; 2011-01-04 at 12:16.
Code:
~ $ grep MyDocs /etc/fstab /dev/mmcblk0p1 /home/user/MyDocs vfat noauto,nodev,noexec,nosuid,noatime,nodiratime,utf8,uid=29999,shortname=mixed,dmask=000,fmask=0133,rodir 0 0 ~ $
a) Remove the noexec option and alter the fmask to force any file to be executable from with /etc/fstab (which is autogenerated, so this will need to be altered every time you boot?)
or
b) unmount manually /home/user/MyDocs and then manually remount with your preferred mount options.
Check the mount manpage for more details on mount options
http://linux.die.net/man/8/mount
There may be other threads on here regarding the specifics of fstab manipulation - give the search option a whirl.
Last edited by gregoranderson; 2011-01-04 at 12:16.
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2011-01-04
, 12:15
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Posts: 244 |
Thanked: 354 times |
Joined on Jul 2010
@ Scotland
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#6
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Originally Posted by anthonie
Are you subsequently mounting with defaults rather than the directives from fstab?
Actually you can chmod files on the MyDocs partition, unless I am misunderstanding your problem. But every time I run into the problem you describe, I have to do a filesystemcheck because the superblock got corrupted, one way or another.
So, when I run into that problem, I unmount the MyDocs partition, fsck -a the now unmounted partition and remount after that.
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2011-01-04
, 12:30
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Posts: 1,048 |
Thanked: 1,127 times |
Joined on Jan 2010
@ Amsterdam
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#7
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Originally Posted by gregoranderson
Yesterday I had to chmod some files in a subdir from MyDocs. Experienced the same problems as OP, no error message from the terminal, but no changed file permissions either.
Are you subsequently mounting with defaults rather than the directives from fstab?
So, in order to get the job done, I did the following
Code:
sudo gainroot umount /home/user/MyDocs fsck -a /dev/mmcblk0p1 mount /home/user/MyDocs
AFAIK, sh scripts can be run from a noexec partition. Binaries not.
So the answer is, yes, I use defaults.
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2011-01-04
, 13:16
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Posts: 244 |
Thanked: 354 times |
Joined on Jul 2010
@ Scotland
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#8
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Thinking out loud, the only reason I can see you wanting to use the large partition for executables would be if you had ran out of room in /dev/mmcblk0p2 and wanted to store a large executable in there (although the original poster never stated any specific intentions).
If so, one solution would be to create a ext3 device with dd in /home/user/MyDocs/somewhere, and loopmount then add to your path. You can then symlink like a crazy mofo.
I'll use my mounted SD card just to be safe
Use DD to create a block device (in this case 500MB).
Use mkfs.ext3 to create a filesystem.
Create a mount point:
And mount:
Create a script for the normal user:
And test:
If so, one solution would be to create a ext3 device with dd in /home/user/MyDocs/somewhere, and loopmount then add to your path. You can then symlink like a crazy mofo.
I'll use my mounted SD card just to be safe
Use DD to create a block device (in this case 500MB).
Code:
Nokia-N900:~# dd if=/dev/zero of=/media/mmc1/bigbin bs=1024 count=512000 512000+0 records in 512000+0 records out Nokia-N900:~# ls -l /media/mmc1/ drwxrwxrwx 2 user root 24576 Dec 31 23:30 DCIM drwxrwxrwx 41 user root 4096 Nov 20 23:02 Music drwxrwxrwx 2 user root 4096 Dec 31 16:47 Video -rw-r--r-- 1 user root 524288000 Jan 4 13:01 bigbin
Code:
Nokia-N900:~# mkfs.ext3 /media/mmc1/bigbin mke2fs 1.41.3.maemo0 (12-Oct-2008) /media/mmc1/bigbin is not a block special device. Proceed anyway? (y,n) y Filesystem label= OS type: Linux Block size=1024 (log=0) Fragment size=1024 (log=0) 128016 inodes, 512000 blocks 25600 blocks (5.00%) reserved for the super user First data block=1 Maximum filesystem blocks=67633152 63 block groups 8192 blocks per group, 8192 fragments per group 2032 inodes per group Superblock backups stored on blocks: 8193, 24577, 40961, 57345, 73729, 204801, 221185, 401409 Writing inode tables: done Creating journal (8192 blocks): done Writing superblocks and filesystem accounting information: done This filesystem will be automatically checked every 38 mounts or 180 days, whichever comes first. Use tune2fs -c or -i to override. Nokia-N900:~#
Code:
Nokia-N900:~# mkdir /home/user/bin Nokia-N900:~# chown user:users /home/user/bin
Code:
Nokia-N900:~# mount -o loop /media/mmc1/bigbin /home/user/bin
Code:
Nokia-N900:~# su - user BusyBox v1.10.2 (Debian 3:1.10.2.legal-1osso30+0m5) built-in shell (ash) Enter 'help' for a list of built-in commands. ~ $ echo "date" > bin/test.sh ; chmod u+x bin/test.sh
Code:
~ $ PATH=$PATH:/home/user/bin ~ $ test.sh Tue Jan 4 13:03:50 GMT 2011
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2011-01-04
, 13:39
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Posts: 1,048 |
Thanked: 1,127 times |
Joined on Jan 2010
@ Amsterdam
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#9
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Interesting. I am on the verge of completely wiping my device for the first time since I got it, and I must admit your approach sounds tempting.
I might actually follow that path.
PS: Forgot to ask, are there any repercussions, removing the noexec paramater from fstab?
I might actually follow that path.
PS: Forgot to ask, are there any repercussions, removing the noexec paramater from fstab?
Consider this :
~/MyDocs/.documents $ ls -la myfile
-rw-r--r-- 1 user root 579498 Jan 6 02:14 myfile
~/MyDocs/.documents $ chmod 755 myfile
~/MyDocs/.documents $ ls -la myfile
-rw-r--r-- 1 user root 579498 Jan 6 02:14 myfile
Why is the file still non-executable ? And why did the shell not issue some kind of error ? I tried to
~/MyDocs/.documents $ sudo chmod 755 myfile
But that w/ the exact same result : Job not done and no error.
When I issue a "which chmod" I get a reassuring
/bin/chmod...
I'm obviously missing something, a week ago I tried to create a simple symlink but to no avail...
Please point me in the right direction, as for now I can't do much w/ the shell