Description of problem:
I like using 'chattr +i filename' to protect a file from being modified by anything. Imagine my surprise when I found that the file was still growing after I had typed that command.
Version-Release number of selected component (if applicable):
Steps to Reproduce:
1. ping -n 220.127.116.11 > filename &
2. chattr +i filename
3. ls -l filename; sleep 2; ls -l filename
4. lsattr filename
The file keeps growing, even though the immutable bit is on.
The file should become frozen, any program currently writing to it should get an error, probably EACCES, EPERM, EDQUOT, EIO, EROFS, or ENOSPC, depending on what's most commonly checked for by programs that actually do error checking on writes.
I suppose the current behaviour may be desired, simply because that's the way permissions have always worked: typing 'chmod a-w filename' had no effect on programs that were already writing to the file, for example.
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