On Thursday, August 8, 2013 12:25:07 PM UTC-5, Dahong Tang wrote:
> 
> It's strange isn't it? You think nobody could mess with 644 files that belong 
> to you, but if another user has write permission to the same directory, then 
> he can overwrite your files using vim and totally mess them up. I don't 
> understand why this was chosen as the default behavior of vim. Seems 
> dangerous.

When you do ":e yourfile | wq!" Vim is basically doing:

$ cat yourfile > myfile
$ rm yourfile
$ mv myfile yourfile

You're the one who gave others permission to mess with your filesystem.

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