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Specify the inode of a file?

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Operating Systems Solaris Specify the inode of a file?
# 8  
Old 03-26-2014
That's the reason why Bartus11 asked you about what your application uses to read the inode number. "ls -li file" uses stat64 which is temporarily "patched" with the dtrace script, "ls -li" alone uses getdents which is not.

You should trace your application to figure out what it uses. Use the truss command to do it.
This User Gave Thanks to jlliagre For This Post:
unblockable
# 9  
Old 03-26-2014
Quote:
Originally Posted by jlliagre
That's the reason why Bartus11 asked you about what your application uses to read the inode number. "ls -li file" uses stat64 which is temporarily "patched" with the dtrace script, "ls -li" alone uses getdents which is not.

You should trace your application to figure out what it uses. Use the truss command to do it.
Ah, I see thank you. I ran my command with truss, and greped the output for both stat64 and getdents. Grep for stat64 returned many results including:
Code:
[root@sol10: /test]# cat truss.log |grep stat64
...
fstat64(3, 0xFFBFF810)                          = 0
fstat64(2, 0xFFBFE2D8)                          = 0
stat64("./libc.so.1", 0xFFBFD328)               Err#2 ENOENT
fstat64(4, 0xFFBFD160)                          = 0
fstat64(4, 0xFFBFD008)                          = 0
fstat64(4, 0xFFBFD3B8)                          = 0
fstat64(4, 0xFFBFD260)                          = 0
/1:     lstat64("/test", 0xFFBFD600)                    = 0
/1:     fstat64(4, 0xFFBFD358)                          = 0
/1:     lstat64("/test", 0xFFBFD340)                    = 0
/1:     lstat64("/test/..", 0xFFBFD340)                 = 0
/1:     lstat64("/test/passwd2", 0xFFBFD340)            = 0
/1:     lstat64("/test/fake_inode.d", 0xFFBFD340)       = 0
/1:     lstat64("/test/truss.log", 0xFFBFD340)          = 0
/1:     fstat64(5, 0xFFBFD368)                          = 0
/1:     fstat64(5, 0xFFBFD210)                          = 0

And grep for getdents returns:
Code:
[root@sol10: /test]# cat truss.log |grep getdents
/1:     getdents64(4, 0xFE994000, 8192)                 = 144
/1:     getdents64(4, 0xFE994000, 8192)                 = 0

edit: Is there a way to change the inode of a file permanently? Or specify the inode when creating a new file?
Last edited by unblockable; 03-26-2014 at 03:14 PM..
# 10  
Old 03-26-2014
As far as I'm aware, it is not possible (or very hard to do). Did you confirm that the DTrace script did not change the inode reported by your application?
# 11  
Old 03-26-2014
Quote:
Originally Posted by bartus11
As far as I'm aware, it is not possible (or very hard to do). Did you confirm that the DTrace script did not change the inode reported by your application?
Ah darn, okay. Unfortunately I did not get my expected results while running the script. Thank you for the help though!
# 12  
Old 03-26-2014
It is possible that the application is using "fstat*" system calls to get inode numbers. I can prepare a new version of the DTrace script tomorrow, if you are interested.
# 13  
Old 03-26-2014
Quote:
Originally Posted by bartus11
It is possible that the application is using "fstat*" system calls to get inode numbers. I can prepare a new version of the DTrace script tomorrow, if you are interested.
I'm actually going to be out of town for a few days starting tomorrow so I won't be able to look at this issue until I return, but if is still unresolved when I get back I will attempt to bump the thread. Thanks again!
# 14  
Old 03-27-2014
Quote:
Originally Posted by unblockable
edit: Is there a way to change the inode of a file permanently? Or specify the inode when creating a new file?
Kind of. Create more than four billion empty files and the next ones will have an inode not fitting in a 32 bit integer. That might be a lenghty task though ...
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