Re: Weird tramp scp permissions issue with

[Ian Eure <ian@digg.com>]

On Nov 8, 2008, at 12:43 PM, Kevin Rodgers wrote:

> Ian Eure wrote:
>> Any file I create on a remote host using tramp's scp method gets a  
>> mode of 0600, rather than the 0644 I would like. If I use the  
>> (slower) ssh method, the file gets the correct mode.
>> What seems to be happening is that the local file gets created with  
>> 0600, which is preserved when it's SCP'd over. Indeed, 'tramp- 
>> methods shows that the `-p' argument is passed to scp, which does  
>> exactly this.
>> My umask is 0022 on both ends, which is correct. So tramp seems to  
>> be creating the file with 0600 before it copies it.
>> Does anyone know how I can fix this?
>
> ,----[ C-h f default-file-modes RET ]
> ,----[ C-h f set-default-file-modes RET ]
>
> For the familiar octal notation:
>
> (format "%03o" (default-file-modes))
>
This shows the default mode is "755", not 0600. If this were the  
source of the problem, all files created with Emacs would be created  
with that mode, not just ones with Tramp. Files created locally, or on  
a remote machine via the ssh method get the correct (0644) mode. Only  
files created on a remote machine with the scp method get mode 0600.

Digging through tramp.el, I found: tramp-set-auto-save-file-modes,  
"Set permissions of autosaved remote files to the original  
permissions." It has a hard-coded "0600" in it, and this is the only  
place I see any specific permissions in the Tramp source. I changed  
that to 0644, and eval'd the function. It didn't change anything, I  
still get the same behavior.


  - Ian