file write operations produces IOError errno13 permission denied

[Hani]

Hi,

I'm a Python and Django newbie. I have searched about this issue and
found nothing.

I have a simple Django app where I want to write to a file when
certain steps have occurred.

When the following line of code is reached:

logstep=open(filename,'a')

an IOError, error 13, permission denied is produced.

Any insight as to why this may happen would be greatly appreciated.

BTW, this works fine from the shell.

Thanks,
Hani

[Martin Diers]

Probably because your web server process does not have write
permissions to the file / directory in question?

Are you running from the shell as the same user that is running your
code in the webserver?

[Hani]

This is on my ubuntu machine at home. I am not sure what user is
running the code in the webserver but I would assume it's the same
user ( I don't know that much about linux permissions).

Thanks,
Hani

[Hani]

Martin,

I think you solved it.

I added a path to the /tmp folder and the error went away and it
started writing to the file.

Thanks,
Hani

On Jul 31, 12:22 pm, Martin Diers <mar...@diers.us> wrote:

[Martin Diers]

If you are running the development server (./manage.py runserver),
then you are correct, it should be running under your user account.

If, however, you are running under a web server, such as Apache, then
it will be running under the Apache user's account.

Any process can write to /tmp, so that of course should always work,
but it's not the best place to put log files.

Presuming you are running the development server, I would check to
make absolutely sure the filename string is what you expect it to be.
You can easily check this by adding a "print filename" above that line
of code, and checking the dev server's console.

[James Matthews]

Also in regard to permissions you can look here http://en.wikipedia.org/wiki/Chmod

--
http://www.jewelerslounge.com
http://www.goldwatches.com/mens/

[Gwyn Evans]

Another useful thing with the development server is the ability to
just add "import pdb; pdb.set_trace()" in a view function to break to
the debugger!

/Gwyn