[gpfsug-discuss] immutable file in an immutable folder can be touched

[Hannappel, Juergen]

... if I try a similar action e.g on ext4 where I can use the posix way
with
ioctl(fd, FS_IOC_GETFLAGS, &flags)
flags |= FS_IMMUTABLE_FL;
ioctl(fd, FS_IOC_SETFLAGS, &flags)

the touch fails and the mtime remains unchanged....

----- Original Message -----
> From: "Juergen Hannappel" <juergen.hannappel at desy.de>
> To: "gpfsug main discussion list" <gpfsug-discuss at spectrumscale.org>
> Sent: Monday, 28 March, 2022 11:50:50
> Subject: [gpfsug-discuss] immutable file in an immutable folder can be touched

> Hi,
> I have an immutable file in an immutable folder:
> 
> mmchattr -i yes mutabilityTest/file
> mmchattr -i yes mutabilityTest
> ls -la mutabilityTest
> total 18
> drwxr-xr-x 2 hannappj it 4096 Mar 28 11:45 .
> drwxr-xr-x 7 hannappj it 8192 Mar 28 11:45 ..
> -rw-r--r-- 1 hannappj it   30 Mar 28 11:45 file
> 
> mmlsattr -L mutabilityTest mutabilityTest/file | grep immu
> immutable:            yes
> immutable:            yes
> 
> 
> Now i do a touch:
> touch mutabilityTest/file
> 
> no error, and the modification time is changed:
> ls -la mutabilityTest
> total 18
> drwxr-xr-x 2 hannappj it 4096 Mar 28 11:45 .
> drwxr-xr-x 7 hannappj it 8192 Mar 28 11:45 ..
> -rw-r--r-- 1 hannappj it   30 Mar 28 11:46 file
> 
> stat mutabilityTest/file
>  File: ‘mutabilityTest/file’
>  Size: 30        	Blocks: 2          IO Block: 4194304 regular file
> Device: 2eh/46d	Inode: 112989      Links: 1
> Access: (0644/-rw-r--r--)  Uid: (28851/hannappj)   Gid: ( 1000/      it)
> Access: 2022-03-28 11:46:28.454807982 +0200
> Modify: 2022-03-28 11:46:28.454807982 +0200
> Change: 2022-03-28 11:46:28.454807982 +0200
> 
> 
> Shouldn't the immutability of the file include its change time?
> 
> 
> 
> --
> Dr. Jürgen Hannappel  DESY/IT    Tel.  : +49 40 8998-4616
> 
> _______________________________________________
> gpfsug-discuss mailing list
> gpfsug-discuss at gpfsug.org
> http://gpfsug.org/mailman/listinfo/gpfsug-discuss_gpfsug.org