On 18/01/2023 16:02, Ihor Radchenko wrote:
> bhrgunatha<bhrgunatha@gmail.com>  writes:
>
>> Open emacs.
>> Open some .org file with src blocks in some folder <path to file>/some.org
>> Notice a new folder called babel-stable-nnn (some randome 3 digit
>> number) appears in the folder containing the .org file.
>>
>> I think these should be created in my /tmp/ folder, not the folder
>> containing the .org file.
>>
>> Sometimes they ARE created in my /tmp/ folder.
> Thanks for reporting!
>
> Could you open one of the folders where babel-stable-nnn directories are
> present and then run M-: (temporary-file-directory) ?
> Is the printed output "/tmp"? Something else?
>
Thanks for responding Ihor.

Opening e.g. "/mnt/data/src/learning/zig/zig_notes.org"
In the buffer visiting zig_notes.org:
M-: (temporary-file-directory) -
"/mnt/data/src/learning/zig/"
The variable though:
temporary-file-directory -
"/tmp/"

Looking at that function and from the same buffer I also checked:
default-directory -
"/mnt/data/src/learning/zig/"
mounted-file-systems -
"^\\(?:/\\(?:afs/\\|m\\(?:edia/\\|nt\\)\\|\\(?:ne\\|tmp_mn\\)t/\\)\\)"
(find-file-name-handler default-directory 'temporary-file-directory) -
0

I wondered about a buffer not visiting a file. In my default *scratch* 
buffer I get:
(temporary-file-directory) -
"/tmp/"
temporary-file-directory -
"/tmp/"
mounted-file-systems -
"^\\(?:/\\(?:afs/\\|m\\(?:edia/\\|nt\\)\\|\\(?:ne\\|tmp_mn\\)t/\\)\\)"
(find-file-name-handler default-directory 'temporary-file-directory) -
nil

The same in some *help* buffer though _except_:
(temporary-file-directory) -
"/mnt/data/src/learning/zig/"