Comments (9)
adminx01
commented on June 6, 2024
1
anyway thanks!
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mhx
commented on June 6, 2024
Interesting. I don't think this error comes directly from dwarfs. Cannot with a capital C doesn't occur even once in the source code.
Can you please provide a full example that would reproduce this error?
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adminx01
commented on June 6, 2024
This issue might actually be caused by some setting me and my team use in our scripts. however i only started seeing this error after 0.7 so naturally I'm more suspicious towards that.
dummy-test.tar.gz
I attached an archive with a dummy dwarfs image and 2 scripts, one for mounting and one for unmounting.
Run the mounting one first and then the unmount one where I expect you to see the output:
Cannot stat file /proc/814/fd/0: Permission denied
Cannot stat file /proc/814/fd/1: Permission denied
Cannot stat file /proc/814/fd/2: Permission denied
Cannot stat file /proc/814/fd/3: Permission denied
Cannot stat file /proc/814/fd/4: Permission denied
Cannot stat file /proc/814/fd/5: Permission denied
Cannot stat file /proc/814/fd/6: Permission denied
Cannot stat file /proc/814/fd/7: Permission denied
Cannot stat file /proc/814/fd/9: Permission denied
Cannot stat file /proc/814/fd/10: Permission denied
Cannot stat file /proc/814/fd/11: Permission denied
Cannot stat file /proc/814/fd/12: Permission denied
Cannot stat file /proc/814/fd/13: Permission denied
Cannot stat file /proc/814/fd/14: Permission denied
Cannot stat file /proc/814/fd/15: Permission denied
Cannot stat file /proc/814/fd/16: Permission denied
Cannot stat file /proc/814/fd/19: Permission denied
Cannot stat file /proc/814/fd/20: Permission denied
Cannot stat file /proc/814/fd/21: Permission denied
Cannot stat file /proc/814/fd/23: Permission denied
Cannot stat file /proc/814/fd/24: Permission denied
Cannot stat file /proc/814/fd/25: Permission denied
Cannot stat file /proc/814/fd/36: Permission denied
Cannot stat file /proc/814/fd/37: Permission denied
Cannot stat file /proc/814/fd/38: Permission denied
Cannot stat file /proc/814/fd/39: Permission denied
Cannot stat file /proc/814/fd/40: Permission denied
Cannot stat file /proc/814/fd/41: Permission denied
Cannot stat file /proc/814/fd/42: Permission denied
Cannot stat file /proc/814/fd/43: Permission denied
Cannot stat file /proc/814/fd/44: Permission denied
Cannot stat file /proc/814/fd/45: Permission denied
Cannot stat file /proc/814/fd/46: Permission denied
Cannot stat file /proc/1049/fd/0: Permission denied
Cannot stat file /proc/1049/fd/1: Permission denied
Cannot stat file /proc/1049/fd/2: Permission denied
Cannot stat file /proc/1049/fd/3: Permission denied
Cannot stat file /proc/1049/fd/4: Permission denied
Cannot stat file /proc/1049/fd/5: Permission denied
Cannot stat file /proc/1049/fd/6: Permission denied
Cannot stat file /proc/1049/fd/7: Permission denied
Cannot stat file /proc/1049/fd/8: Permission denied
Cannot stat file /proc/1049/fd/9: Permission denied
Cannot stat file /proc/1049/fd/10: Permission denied
Cannot stat file /proc/1049/fd/11: Permission denied
Cannot stat file /proc/1049/fd/12: Permission denied
Cannot stat file /proc/1049/fd/13: Permission denied
Cannot stat file /proc/1049/fd/14: Permission denied
Cannot stat file /proc/1049/fd/15: Permission denied
Cannot stat file /proc/1049/fd/16: Permission denied
Cannot stat file /proc/1049/fd/17: Permission denied
Cannot stat file /proc/1049/fd/18: Permission denied
Cannot stat file /proc/1049/fd/19: Permission denied
Cannot stat file /proc/1049/fd/20: Permission denied
Cannot stat file /proc/1049/fd/21: Permission denied
Cannot stat file /proc/1049/fd/22: Permission denied
Cannot stat file /proc/1049/fd/23: Permission denied
Cannot stat file /proc/1049/fd/24: Permission denied
Cannot stat file /proc/1049/fd/25: Permission denied
Cannot stat file /proc/1049/fd/26: Permission denied
Cannot stat file /proc/1049/fd/27: Permission denied
/***/test/files/.groot-mnt: 5039
rm: cannot remove '/***/test/files/.groot-work': Directory not empty
Unmounted game.
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adminx01
commented on June 6, 2024
Also I am on GNU/Linux Arch. If you have a distro which is slower on updates and is perhaps on an older version of fuse then that could yield a different result, if fuse is the culprit.
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mhx
commented on June 6, 2024
Pretty certain the error gets emitted by the fuser call in unmount.sh, so it's likely neither DwarFS nor FUSE.
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mhx
commented on June 6, 2024
I cannot reproduce the behaviour (on an up-to-date Gentoo system), but I do see
$ strings /bin/fuser | grep 'Cannot stat file'
Cannot stat file %s: %s
as well as
$ strace fuser -k tmp 2>&1 | grep 'stat.*/proc/' | wc -l
3100
Perhaps you can gain some insight by checking what the processes belonging to the PIDs in the error message actually are. If the user running fuser -k doesn't have permission to access/kill these processes, then the error seems reasonable to me.
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mhx
commented on June 6, 2024
For completeness, I'm using fuser from psmisc-23.6.
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adminx01
commented on June 6, 2024
yep fuser -k was the issue. weird that it started giving these errors out of nowhere. we use fuser -k to force all processes of the program to close in order to make sure dwarfs can be unmounted immediately. these errors cause confusion to users though. i should find a more silent way to go about it
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mhx
commented on June 6, 2024
As I said, probably worth checking what the problematic processes are.
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